WorldWideScience

Sample records for paraguayan cnea

  1. CNEA's quality system documentation

    International Nuclear Information System (INIS)

    Mazzini, M.M.; Garonis, O.H.

    1998-01-01

    Full text: To obtain an effective and coherent documentation system suitable for CNEA's Quality Management Program, we decided to organize the CNEA's quality documentation with : a- Level 1. Quality manual. b- Level 2. Procedures. c-Level 3. Qualities plans. d- Level 4: Instructions. e- Level 5. Records and other documents. The objective of this work is to present a standardization of the documentation of the CNEA's quality system of facilities, laboratories, services, and R and D activities. Considering the diversity of criteria and formats for elaboration the documentation by different departments, and since ultimately each of them generally includes the same quality management policy, we proposed the elaboration of a system in order to improve the documentation, avoiding unnecessary time wasting and costs. This will aloud each sector to focus on their specific documentation. The quality manuals of the atomic centers fulfill the rule 3.6.1 of the Nuclear Regulatory Authority, and the Safety Series 50-C/SG-Q of the International Atomic Energy Agency. They are designed by groups of competent and highly trained people of different departments. The normative procedures are elaborated with the same methodology as the quality manuals. The quality plans which describe the organizational structure of working group and the appropriate documentation, will asses the quality manuals of facilities, laboratories, services, and research and development activities of atomic centers. The responsibilities for approval of the normative documentation are assigned to the management in charge of the administration of economic and human resources in order to fulfill the institutional objectives. Another improvement aimed to eliminate unnecessary invaluable processes is the inclusion of all quality system's normative documentation in the CNEA intranet. (author) [es

  2. Antioxidant activity of Paraguayan plant extracts.

    Science.gov (United States)

    Velázquez, E; Tournier, H A; Mordujovich de Buschiazzo, P; Saavedra, G; Schinella, G R

    2003-02-01

    The antioxidant properties of six medical herbs used in the traditional Paraguayan medicine were studied using free radical-generating systems. The methanol extracts from Aristolochia giberti, Cecropia pachystachya, Eugenia uniflora, Piper fulvescens, Schinus weinmannifolia and Schinus terebinthifolia protected against enzymatic and non-enzymatic lipid peroxidation in microsomal membranes of rat. C. pachystachya, E. uniflora, S. weinmannifolia and S. terebinthifolia showed the highest scavenging activity on the superoxide and DPPH radicals.

  3. [Brazilian colonization in the Paraguayan agricultural frontier].

    Science.gov (United States)

    Neupert, R F

    1991-04-01

    This work briefly describes Brazilian colonization of the Paraguayan agricultural frontier, analyzes factors responsible for expelling population from Brazil and for attracting Brazilians to Paraguay, and assesses the economic and social consequences of immigration to the area. Paraguay's vast and sparsely populated agricultural frontier in areas outside the Central subregion underwent a process of intense colonization from the early 1960s to the mid-1980s. The Paraguayan government initiated an ambitious colonization program in 1963 to increase production, relieve population pressure and subdivision of small parcels in the Central subregion, encourage agricultural modernization, and produce a more diversified agriculture. Paraguayan agriculture in the early 1960s suffered from excessive concentration of land in a few hands and resulting exclusion of around 3/4 of workers from ownership and from any possibility of obtaining credit to fund technological improvements. Results of studies 2 decades after implementation of the colonization plan suggest that it has failed in significant areas. Although a considerable population redistribution alleviated pressure in the Central subregion, it apparently resulted more from spontaneous movement of peasants outside the colonization areas than from the official program. Concentration of lands is now occurring in the colonization area. Assistance for agricultural modernization and diversification of production in the peasant sector has been minimal. On the other hand, production of soy, wheat, and cotton for export increased substantially, because of an entrepreneurial agriculture capitalized by foreign as well as national interests The unmet goals of the colonization program would have required structural reforms rather than simple spatial redistribution of the population. Many of the colonists in the 1970s were Brazilian families displaced by mechanized agriculture in the southern states of Parana, Santa Catarina, and Rio

  4. Environmental impact statement requirements for CNEA

    International Nuclear Information System (INIS)

    Ciurciolo, Melisa N.; Mender, J. A.

    2009-01-01

    The purpose of this paper is to describe the legal framework on Environmental Impact Assessment (EIA) regarding the activities of the National Atomic Energy Commission (Comision Nacional de Energia Atomica, CNEA), and particularly, the Procedure for Internal Management of Environmental Impact Statements of CNEA (PN-PR-027). According to the distribution of powers stated in article 41 of the National Constitution, the environmental legal framework is constituted by National minimum standards for environmental protection and complementary provincial and municipal regulations. As a result, the EIA legal framework is not uniform across the Nation, and therefore, it differs according to the jurisdiction in which the activity subject to EIA is developed. Notwithstanding, the General Statute of the Environment (25.675) requires EIA for any project or activity developed in the National territory, which may cause a significant degradation to the environment, any of its components, or affect the populations' quality of life in a significant way. Since CNEA develops activities along the National territory, it is not possible to determine a uniform legal EIA framework for the entire Institution. Consequently, the binding requirements for Environmental Impact Statements (EISs) of CNEA activities differ among the activities developed in the different locations and atomic centers. In order to achieve a uniform environmental performance in CNEA, it has been considered necessary to uniform, in the internal sphere, the binding requirements for EIS, by means of a procedure written within the framework of the Environmental Management System of the Institution. The purpose of the Procedure for Internal Management of Environmental Impact Statements is to determine the requirements to be complied by the atomic centers, locations and enterprises associated with CNEA, regarding EIS Management. This Procedure shall apply to those projects and activities subjected to EIA, according to a

  5. IFPE/CNEA-MOX-RAMP, CNEA Power Ramp Irradiations with (PHWR) MOX Fuels

    International Nuclear Information System (INIS)

    Marino, Armando Carlos; Turnbull, J.A.

    2000-01-01

    Description: The irradiation of the first MOX nuclear fuel rods fabricated in Argentina began in 1986. These experiences were made in the HFR-Petten reactor, Holland. The six rods were fabricated in the a Facility (GAID-CNEA-Argentina). The first rod has been used for destructive pre-irradiation characterization in the KFK (Kernforschungszentrum Karlsruhe), Germany. The second one was a pathfinder for calibrating HFR systems in Petten. Two other rods included pellets doped with iodine. The first contained mostly CsI whilst the second contained elemental iodine. The concentration of iodine was intended to simulate a burn-up of 15000 MWd/ton(M). The power histories were defined from calculations performed with the BACO code. A 15 day cycle was assumed with a power history that induced PCMI during power cycling. The last high power period was maintained until stress corrosion cracking (SCC) was induced. Two further un-doped rods were used in a sub-program named BU15. Here a burn-up of 15000 MWd/ton(M) was achieved at a low power followed by a final power ramp for one of the rods. The ramp was similar to that used for the Iodine test. The HFR irradiation was conducted satisfactorily. The objective was to attempt a correspondence in behaviour between the doped rods and BU15 rods. PIE detected the presence of micro-cracks inside the cladding of the iodine doped rods. Ramping of the BU15 rod was interrupted when an increase of coolant activity was detected. After discharge, a visual inspection of the rod showed the presence of a small circular hole in the cladding. Additional PIE showed that the hole was due to a SCC failure

  6. 2004 status of RERTR activities of CNEA - Argentina

    International Nuclear Information System (INIS)

    Audero, M.; Balart, S.; Boero, N.; Cabot, P.; Manzini, A.; Pasqualini, E.; Ruggirello, G.; Taboada, H.

    2005-01-01

    During 2004 several activities related to RERTR topics has taken place. In what follows, a resume of those activities is presented. During 2004 the Nuclear Fuel Cycle Program has supported the activities of about a hundred of researchers and technicians involved on different aspects of Very high density fuel developpement (VHD) fuel development as R and D, mini-plates, plates and fuel assemblies fabrication, irradiation and PIE analyses of VHD fuels. CNEA's LEU MTR fuel waste disposal plans are concerned with spent fuel from the reactor RA-3. The SF will be kept in interim storage until a geological repository is available for disposal. According to the current planning, this repository would be available in the year 2050 to receive the SF from the NPPs or the HLW from their reprocessing. Since 2002 the domestic production of Mo99 and other fission radioisotopes is performed using LEU targets, fulfilling international technical and quality standards. Up to present more than 600 targets bearing LEU material have been fabricated irradiated and processed. Very recently CNEA has also become an international supplier of targets for Mo-99 production. This status report deals as well with the International framework i.e. Global Threat Reduction Initiative and the historical involvement of Argentina in the peaceful applications of nuclear energy

  7. Accreditation of testing laboratories in CNEA (National Atomic Energy Commission)

    International Nuclear Information System (INIS)

    Piacquadio, N.H.; Casa, V.A.; Palacios, T.A.

    1993-01-01

    The recognition of the technical capability of a testing laboratory is carried out by Laboratory Accreditation Bodies as the result of a satisfactory evaluation and the systematic follow up of the certified qualification. In Argentina the creation of a National Center for the Accreditation of Testing Laboratories, as a first step to assess a National Accreditation System is currently projected. CNEA, as an institution involved in technological projects and in the development and production of goods and services, has adopted since a long time ago quality assurance criteria. One of their requirements is the qualification of laboratories. Due to the lack of a national system, a Committee for the Qualification of Laboratories was created jointly by the Research and Development and Nuclear Fuel Cycle Areas with the responsibility of planning and management of the system evaluation and the certification of the quality of laboratories. The experience in the above mentioned topics is described in this paper. (author)

  8. Molecular Diagnosis of Polycystic Echinococcosis Due to Echinococcus vogeli in a Paraguayan Immigrant in Argentina

    Science.gov (United States)

    Frider, B.; Alvarez Rodriguez, J.; Amante, M.; Pestalardo, M. L.; Cazorla, A.; Bresson-Hadni, S.; Millon, L.

    2013-01-01

    Polycystic echinococcosis due to Echinococcus vogeli is a rare parasitic infection that occurs in rural areas of Central and South America. Only molecular identification performed on formalin-fixed paraffin-embedded liver tissue samples gave an unequivocal diagnosis of this disease in a Paraguayan immigrant in Argentina. PMID:23824768

  9. Guarani Morphology in Paraguayan Spanish: Insights from Code-Mixing Typology

    Science.gov (United States)

    Estigarribia, Bruno

    2017-01-01

    In this paper we examine the use of Guarani affixes and clitics in colloquial Paraguayan Spanish. We depart from the traditional view of these as "borrowings," and instead explore the idea that these phenomena can be integrated within Muysken's (2000, 2013, 2014) typology of code-mixing. We claim that most of these uses may stem from a…

  10. Cognition, culture and utility: plant classification by Paraguayan immigrant farmers in Misiones, Argentina.

    Science.gov (United States)

    Kujawska, Monika; Jiménez-Escobar, N David; Nolan, Justin M; Arias-Mutis, Daniel

    2017-07-25

    This study was conducted in three rural communities of small farmers of Paraguayan origin living in the province of Misiones, Argentina. These Criollos (Mestizos) hail chiefly from departments located in the east of Paraguay, where the climate and flora have similar characteristics as those in Misiones. These ecological features contribute to the continuation and maintenance of knowledge and practices related to the use of plants. Fieldwork was conducted between September 2014 and August 2015. Forty five informants from three rural localities situated along the Parana River participated in an ethno-classification task. For the classification event, photographs of 30 medicinal and edible plants were chosen, specifically those yielding the highest frequency of mention among the members of that community (based on data obtained in the first stage of research in 2014). Variation in local plant classifications was examined and compared using principal component analysis and cluster analysis. We found that people classify plants according to application or use (primarily medicinal, to a lesser extent as edible). Morphology is rarely taken into account, even for very similar and closely-related species such as varieties of palms. In light of our findings, we highlight a dominant functionality model at work in the process of plant cognition and classification among farmers of Paraguayan origin. Salient cultural beliefs and practices associated with rural Paraguayan plant-based medicine are described. Additionally, the manner by which residents' concepts of plants articulate with local folk epistemology is discussed. Culturally constructed use patterns ultimately override morphological variables in rural Paraguayans' ethnobotanical classification.

  11. Technology transfer in the CNEA: Between 'supply-slide' and nuclear plan

    International Nuclear Information System (INIS)

    Enriquez, Santiago N

    2012-01-01

    This paper reflects on linkage activities and technology transfer of Atomic Energy National Commission (CNEA). Given that the CNEA was a S and T institution, which was pioneer in activities to reach out the productive sector; it will show that, since 1961, the year of the creation of the Service of Technical Assistance to Industry (SATI) -; until today -where the Law 23.877 of Promotion of the Technological Innovation is fully implemented, different modes of technology transfer based on certain S and T policies are detected. First, it will describe the characteristics of the technology transfer made by SATI, and its connection with the political decisions made by the Department of Metallurgy of CNEA to relate the domestic industry and the Nuclear Plan. In a second instance, it will describe the effects on the technology transfer after the disabling of the Nuclear Plan in 1994, the enforcement of Law 23,877 in CNEA and progressive deactivation of SATI. Finally, it will reflect on the two main stages of technology transfer in CNEA for potential S and T policies (author)

  12. The role of CNEA as a TSO in the enhancement of nuclear safety

    International Nuclear Information System (INIS)

    Gho, C.J.

    2007-01-01

    Argentina's National Atomic Energy Commission (CNEA) was created in 1950 to promote the development of the pacific technological applications of nuclear energy within the country. Since its very beginning CNEA considered that nuclear development is possible only if it is supported by broad scientific knowledge and accompanied by an adequate progress of the needed technological capacities. Thus, an important investment was done to educate and prepare professionals to form a technical staff that had broad backgrounds; as a consequence, excellent educational and training Institutes were created, and a number of researchers, engineers and technologists were educated. Since the early days, CNEA has paid special attention to crucial aspects such as radiological protection and nuclear safety. CNEA has had a role in contributing to the national growth of Argentine scientific and technical sector. This role has been necessary not only to provide the basis for the development in national nuclear industry but also to set up its own professional staff, which lately gave technical and scientific support to the emerging sector. This was done by means of agreements with the main Argentine Universities as a new way to educate and train professional and efficient staff

  13. ANL progress in developing a target and process for converting CNEA Mo-99 production to LEU

    International Nuclear Information System (INIS)

    Vandegrift, G.F.; Gelis, A.; Aase, S.; Bakel, A.; Freiberg, E.; Conner, C.

    2002-01-01

    The primary mission of the Reduced Enrichment in Research and Test Reactors (RERTR) Program is to facilitate the conversion of research and test reactor fuel and targets from high-enriched uranium (HEU) to low-enriched uranium (LEU). One of the current goals at Argonne National Laboratory (ANL) is to convert 99 Mo production at Argentine Commission Nacional de Energia Atomica (CNEA) from HEU to LEU targets. Specifically addressed in this paper is ANL R and D related to this conversion: (1) designing a prototype production vessel for digesting irradiated LEU foils in alkaline solutions, (2) developing means to improve digestion efficiency, and (3) modifying ion-exchange processes used in the CNEA recovery and purification of 99 Mo to deal with the lower volumes generated from LEU-foil digestion. (author)

  14. Development and applications of monocrystalline silicon radiation sensors fabricated at Comision Nacional de Energia Atomica (CNEA)

    International Nuclear Information System (INIS)

    Bolzi, C; Bruno, C; Duran, J; Godfrin, E; Martinez Bogado, M; Pla, J; Tamasi, M

    2005-01-01

    The development of silicon photovoltaic sensors at CNEA has begun in 1998.These sensors, fabricated in the Photovoltaic Laboratory of the Solar Energy Group at Constituyentes Atomic Center, have been used to build low cost radiometers as well as solar angular position sensors on board of artificial satellites.The design, fabrication and calibration of these sensors have been made in different prototypes in order to analyze its performance and to evaluate its limitations.Nowadays, several commercial prototypes have been distributed in different laboratories of our country in order to evaluate them in real work conditions.Particularly, the first experiment of argentine solar cells on space performed on board of SAC-A satellite, included the fabrication of position sensors of this satellite as part of the alignment system of the solar array respect to the sun.In this article, the state of the art of monocrystalline silicon photovoltaic sensors fabricated at CNEA for terrestrial and space applications is presented

  15. Implementation of the TDCR liquid scintillation method at CNEA-LMR, Argentina.

    Science.gov (United States)

    Arenillas, Pablo; Cassette, Philippe

    2006-01-01

    During the last two years, a triple-to-double coincidence ratio (TDCR) system was assembled and adjusted at the CNEA-LMR, Argentina. The new counting system will add complementary capabilities to the absolute measurements section of the CNEA-LMR. This work describes its implementation and validation. Several checks and a set of beta-emitting standard solutions were used in order to perform the validation experiments. In preliminary measurements, a 3H LNHB solution with reference activity concentration of (119.7+/-0.9) kBq/g on 11 November 2003 was used. The CNEA-LMR TDCR counter gave, at the same reference date, an activity concentration of (120+/-1) kBq/g. Results and improvements are presented in detail. Concerning the asymmetry of the system, the quantum efficiency of the three photomultiplier tubes was studied for different operating conditions of the focusing voltage. The counter also includes an automatic system to change the efficiency by defocusing the photomultipliers and on the other hand, it was coupled to a HPGe detector to also measure beta-gamma coincidences.

  16. Implementation of the TDCR liquid scintillation method at CNEA-LMR, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Arenillas, Pablo [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Cassette, Philippe [Laboratoire National Henri Becquerel, LNE-LNHB, 91191, Gif sur Yvette cedex (France)

    2006-10-15

    During the last two years, a triple-to-double coincidence ratio (TDCR) system was assembled and adjusted at the CNEA-LMR, Argentina. The new counting system will add complementary capabilities to the absolute measurements section of the CNEA-LMR. This work describes its implementation and validation. Several checks and a set of beta-emitting standard solutions were used in order to perform the validation experiments. In preliminary measurements, a {sup 3}H LNHB solution with reference activity concentration of (119.7{+-}0.9) kBq/g on 11 November 2003 was used. The CNEA-LMR TDCR counter gave, at the same reference date, an activity concentration of (120{+-}1) kBq/g. Results and improvements are presented in detail. Concerning the asymmetry of the system, the quantum efficiency of the three photomultiplier tubes was studied for different operating conditions of the focusing voltage. The counter also includes an automatic system to change the efficiency by defocusing the photomultipliers and on the other hand, it was coupled to a HPGe detector to also measure beta-gamma coincidences.

  17. Implementation of the TDCR liquid scintillation method at CNEA-LMR, Argentina

    International Nuclear Information System (INIS)

    Arenillas, Pablo; Cassette, Philippe

    2006-01-01

    During the last two years, a triple-to-double coincidence ratio (TDCR) system was assembled and adjusted at the CNEA-LMR, Argentina. The new counting system will add complementary capabilities to the absolute measurements section of the CNEA-LMR. This work describes its implementation and validation. Several checks and a set of beta-emitting standard solutions were used in order to perform the validation experiments. In preliminary measurements, a 3 H LNHB solution with reference activity concentration of (119.7±0.9) kBq/g on 11 November 2003 was used. The CNEA-LMR TDCR counter gave, at the same reference date, an activity concentration of (120±1) kBq/g. Results and improvements are presented in detail. Concerning the asymmetry of the system, the quantum efficiency of the three photomultiplier tubes was studied for different operating conditions of the focusing voltage. The counter also includes an automatic system to change the efficiency by defocusing the photomultipliers and on the other hand, it was coupled to a HPGe detector to also measure beta-gamma coincidences

  18. a-glucosidase Inhibitors From Paraguayan Natural Medicine, Ñangapiry, The Leaves Of Eugenia Uniflora.

    Science.gov (United States)

    Matsumura, T; Kasai, M; Hayashi, T; Arisawa, M; Momose, Y; Arai, I; Amagaya, S; Komatsu, Y

    2000-01-01

    The water-soluble extract from a Paraguayan natural medicine, Nangapiry, the leaves of Eugenia uniflora L. (Myrtaceae), which has been used as an antidiabetic agent, was found to show inhibitory activities on the increase of plasma glucose level in the sucrose tolerance test (STT) conducted with mice. The portion adsorbed on a cation exchange resin was also found to inhibit a-glucosidases. From the active portion, two new active compounds named uniflorines A ( 1 ) and B ( 2 ) and known (+)-(3a, 4a, 5ß)-1-methylpiperidine-3, 4, 5-triol ( 3 ) were isolated. The structures of uniflorines A and B were determined as (-)-(1S, 2R, 6S, 7R, 8R, 8aR)-1,2,6,7,8-pentahydroxyindolizidine and (+)-(1S, 2R, 5R, 7R, 8S, 8aS)-1,2,5,7,8-pentahydroxyindolizidine by spectral means, respectively.

  19. Human resources development: capabilities and experience of CNEA and its institutes in Argentina

    International Nuclear Information System (INIS)

    Sbaffoni, M.M.; Soler, S.G.; Harriague, S.

    2007-01-01

    Full text: The Argentinean Atomic Energy Commission (Comision Nacional de Energia Atomica - CNEA) was created in 1950. CNEA and its related companies of the nuclear sector are presently active in several fields: operation of two nuclear power plants, construction of a third one, operation of several research reactors and critical facilities, production of Mo-99 from low enrichment targets (having world leadership in that field). Argentina has also exported, in the last twenty-five years, four research reactors (the last one, OPAL in Australia, attained criticality last year), and is active in the fuel cycle (having attained maturity in high-density and very high-density fuel for research reactors, among others), in radioisotope production and in nuclear medicine. The successful attainment of these achievements has always been supported by an active policy of human resources development, either through 'on the job' training activities guided by experienced professionals and sustained on a fellowship programme, or via institutes for under and postgraduate studies. This programme not only satisfies CNEA demands, but also helps providing highly qualified personnel to the local industry and research institutions. Nowadays, the perspective for nuclear energy is promising, but for many years nuclear activities had been loosing momentum worldwide. The nuclear sector became weaker, and CNEA was not an exception. However, it never stopped its activities in educational areas, knowing that many years are needed to form a solid professional in the nuclear field, and having the conviction that, for a sustainable development of the country, nuclear energy should necessarily be part of the supply. Nuclear engineers, material scientists and technologists, physicists, radio chemists, etc., ended up working in industries, universities and R and D institutions after finishing their education, instead of joining CNEA. In 2006 the Argentinean government re-launched nuclear energy

  20. Hosts and vectors of Trypanosoma cruzi discrete typing units in the Chagas disease endemic region of the Paraguayan Chaco

    OpenAIRE

    ACOSTA, NIDIA; L?PEZ, ELSA; LEWIS, MICHAEL D.; LLEWELLYN, MARTIN S.; G?MEZ, ANA; ROM?N, FABIOLA; MILES, MICHAEL A.; YEO, MATTHEW

    2017-01-01

    SUMMARY Active Trypanosoma cruzi transmission persists in the Gran Chaco region, which is considered hyperendemic for Chagas disease. Understanding domestic and sylvatic transmission cycles and therefore the relationship between vectors and mammalian hosts is crucial to designing and implementing improved effective control strategies. Here we describe the species of triatomine vectors and the sylvatic mammal reservoirs of T. cruzi, in different localities of the Paraguayan and Bolivian Chaco....

  1. New nuclear data service at CNEA: retrieval of the update libraries from a local Web-Server; Nuevo servicio de datos nucleares en CNEA: obtencion de bibliotecas actualizadas desde un Servidor Local

    Energy Technology Data Exchange (ETDEWEB)

    Suarez, Patricia M [Comision Nacional de Energia Atomica, Ezeiza (Argentina). Centro Atomico Ezeiza; Pepe, Maria E [Comision Nacional de Energia Atomica, General San Martin (Argentina). Centro Atomico Constituyentes; Sbaffoni, Maria M [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Gerencia de Tecnologia

    2000-07-01

    A new On-line Nuclear Data Service was implemented at National Atomic Energy Commission (CNEA) Web-Site. The information usually issued by the Nuclear Data Section of IAEA (NDS-IAEA) on CD-ROM, as well as complementary libraries periodically downloaded from the a mirror server of NDS-IAEA Service located at IPEN, Brazil are available on the new CNEA Web page. In the site, users can find numerical data on neutron, charged-particle, and photonuclear reactions, nuclear structure, and decay data, with related bibliographic information. This data server is permanently maintained and updated by CNEA staff members. This crew also offers assistance on the use and retrieval of nuclear data to local users. (author)

  2. Qualification of testing laboratories of Comision Nacional de Energia Atomica - CNEA

    International Nuclear Information System (INIS)

    Casa, Adriana; Palacios, Tulio; Peretti, Matilde; Pucci, Gladys; Resnizki, Sara

    1996-01-01

    Testing and calibration laboratories of the Argentine Atomic Energy Commission which made services for the nuclear and conventional industries must prove the reliability of their results. It is achieved implanting at the laboratories, a management quality system, to proof the capacity and technical aptitude, with the establish minimal requirements. When the requirement are fulfilled, the laboratory would be in conditions for a national level accreditation within the National System of Standards, Quality and Certification, recently created for our national government. The Laboratories Calibration Board of CNEA had made some assessments of a group of laboratories in order to determine their quality level. (author)

  3. The Paraguayan Rhinella toad venom: Implications in the traditional medicine and proliferation of breast cancer cells.

    Science.gov (United States)

    Schmeda-Hirschmann, Guillermo; Gomez, Celeste Vega; Rojas de Arias, Antonieta; Burgos-Edwards, Alberto; Alfonso, Jorge; Rolon, Miriam; Brusquetti, Francisco; Netto, Flavia; Urra, Félix A; Cárdenas, César

    2017-03-06

    Toads belonging to genus Rhinella are used in Paraguayan traditional medicine to treat cancer and skin infections. The objective of the study was to determine the composition of venoms obtained from three different Paraguayan Rhinella species, to establish the constituents of a preparation sold in the capital city of Paraguay to treat cancer as containing the toad as ingredient, to establish the effect of the most active Rhinella schneideri venom on the cell cycle using human breast cancer cells and to assess the antiprotozoal activity of the venoms. The venom obtained from the toads parotid glands was analyzed by HPLC-MS-MS. The preparation sold in the capital city of Paraguay to treat cancer that is advertised as made using the toad was analyzed by HPLC-MS-MS. The effect of the R. schneideri venom and the preparation was investigated on human breast cancer cells. The antiprotozoal activity was evaluated on Leishmania braziliensis, L. infantum and murine macrophages. From the venoms of R. ornata, R. schneideri and R. scitula, some 40 compounds were identified by spectroscopic and spectrometric means. Several minor constituents are reported for the first time. The preparation sold as made from the toad did not contained bufadienolides or compounds that can be associated with the toad but plant compounds, mainly phenolics and flavonoids. The venom showed activity on human breast cancer cells and modified the cell cycle proliferation. The antiprotozoal effect was higher for the R. schneideri venom and can be related to the composition and relative ratio of constituents compared with R. ornata and R. scitula. The preparation sold in the capital city of Paraguay as containing the toad venom, used popularly to treat cancer did not contain the toad venom constituents. Consistent with this, this preparation was inactive on proliferation of human breast cancer cells. In contrast, the toad venoms of Rhinella species altered the cell cycle progression, affecting the

  4. New nuclear data service at CNEA: retrieval of the update libraries from a local Web-Server

    International Nuclear Information System (INIS)

    Suarez, Patricia M.; Pepe, Maria E.; Sbaffoni, Maria M.

    2000-01-01

    A new On-line Nuclear Data Service was implemented at National Atomic Energy Commission (CNEA) Web-Site. The information usually issued by the Nuclear Data Section of IAEA (NDS-IAEA) on CD-ROM, as well as complementary libraries periodically downloaded from the a mirror server of NDS-IAEA Service located at IPEN, Brazil are available on the new CNEA Web page. In the site, users can find numerical data on neutron, charged-particle, and photonuclear reactions, nuclear structure, and decay data, with related bibliographic information. This data server is permanently maintained and updated by CNEA staff members. This crew also offers assistance on the use and retrieval of nuclear data to local users. (author)

  5. HIV infection and high-risk behaviours in a Paraguayan military population.

    Science.gov (United States)

    Laguna-Torres, V Alberto; Aguayo, Nicolás; Aguilar, Gloria; Ampuero, Julia S; Galeano, Adolfo; Barboza, Alma; Villafane, Margarita; Jiménez, Liliana; Perez, Juan; Kochel, Tadeusz J; Halsey, Eric S

    2014-10-01

    Between July 2005 and January 2006 we evaluated 1248 Paraguayan active duty military volunteers. Participants provided a blood sample for HIV testing and answered an anonymous survey. HIV seroprevalence was 0.4% (5 of 1248) among participants. The median age at first sexual intercourse was 16 years. Only 14.8% of participants reported condom use with every sexual encounter. Military students used condoms the most. Participants older than 45 years, compared with younger participants, had a fourfold (adjusted odds ratio 4.3) increased risk of not using condoms. Men were less likely to use a condom, more likely to practice anal intercourse, and had more sexual partners than women. Officers and non-commissioned officers were identified to have a twofold (as measured by adjusted odds ratio = 2.00 and 2.22, respectively) increased risk of having more than two sexual partners in the last month compared with students. Both officers and non-commissioned officers were twice as likely as students to practice anal intercourse. Despite the high-risk behaviours reported by those surveyed, HIV seroprevalence in active duty personnel was low. Future efforts should emphasize on the correct condom use keeping focus on the high-risk behaviours of groups at risk, and on routinely testing the military personnel for HIV. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  6. From Resident to President: The Sinuous Participation of Paraguayan Women in Politics and the Emergence of the Feminist Political Movement Kuña Pyrenda

    Directory of Open Access Journals (Sweden)

    Sarah Cerna Villarga

    2015-07-01

    Full Text Available Paraguayan women have transcended history as the mothers of the “Guarani breed”, as The Resident Woman Residentas, the social role of these has been undeniable, but in other scopes, such as the political area, its social and historical role is still invisible, because the policy has historically been considered a male activity. However, many women have contributed to the construction of the history of this nation, and although the asymmetries in the real access to power between men and women are notorious today, Paraguayan want power and will seek, as it was found in the last two presidential elections of 2008 and 2013. On this basis, this paper aims to describe what has been the impact of feminism in Paraguayan politics and, in turn, explain the factors that have influenced raid Kuña Pyrenda feminist movement in the elections of 2013.

  7. Brazil-Argentina bilateral cooperation - Protocol 11. Nuclear safety and radiation protection. Visit of CNEA engineers to Brazil

    International Nuclear Information System (INIS)

    Gasparian, A.E.

    1991-01-01

    The activities carried out by Techniques of Argentine Organization (CNEA) during visitation to Angra dos Reis (Brazil) are related. Licensing procedures for nuclear installations (reactors), and transport, licensing of personnels for nuclear installations, quality assurance and regulatory inspections were discussed. (M.C.K.)

  8. From Bishop to President: historical and mediatic constructions of the Paraguayan president Fernando Lugo in brazilian weekly magazines

    Directory of Open Access Journals (Sweden)

    Rafael Foletto

    2011-12-01

    Full Text Available This article’s purpose is to understand the historical and mediatic constructions made bay brazilian magazines about Bishop Fernando Lugo, in its path from priesthood to president of Paraguay in 2008, and the repercussions of those in the diplomatic relations between the two countries. The research identified, analyzed and questioned the communication processes promoted by the brazilian ma- gazines Carta Capital, Época, Isto É and Veja, from 2007 to 2010, questioning and problematizing the construction of the symbolic representation of the new politi- cal actor, Paraguayan president Fernando Lugo.

  9. ANL progress in developing an LEU target and process for Mo-99 production: Cooperation with CNEA

    International Nuclear Information System (INIS)

    Gelis, A.V.; Vandegrift, G.F.; Aase, S.B.; Bakel, A.J.; Falkenberg, J.R.; Regalbuto, M.C.; Quigley, K.J.

    2003-01-01

    The primary mission of the Reduced Enrichment in Research and Test Reactors (RERTR) Program is to facilitate the conversion of research and test-reactor fuel and targets from high-enriched uranium (HEU) to low-enriched uranium (LEU). One of the current goals at Argonne National Laboratory (ANL) is to assist the Argentine Comision Nacional de Energia Atomica (CNEA) in developing an LEU foil target and a process for 99 Mo production. Specifically addressed in this paper is ANL R and D related to this conversion: (1) designing a prototype production vessel for digesting irradiated LEU foils in alkaline solutions and (2) developing a new digestion method to address all issues related to HEU to LEU conversion. (author)

  10. Advances and highlights of the CNEA qualification program as high density fuel manufacturer for research reactors

    Energy Technology Data Exchange (ETDEWEB)

    Adelfang, P.; Alvarez, L.; Boero, N.; Calabrese, R.; Echenique, P.; Markiewicz, M.; Pasqualini, E.; Ruggirello, G.; Taboada, H. [Unidad de Actividad Combustibles Nucleares Comision Nacional de Energia Atomica (CNE4), Avda. del Libertador, 8250 C1429BNO Buenos Aires (Argentina)

    2002-07-01

    One of the main objectives of CNEA regarding the fuel for research reactors is the development and qualification of the manufacturing of LEU high-density fuels. The qualification programs for both types of fuels, Silicide fuel and U- x Mo fuel, are similar. They include the following activities: development and set up of the fissile compound manufacturing technology, set up of fuel plate manufacturing, fabrication and irradiation of mini plates and plates, design and fabrication of fuel assembly prototypes for irradiation, post-irradiation examination and feedback for manufacturing improvements. This paper describes the different activities performed within each program during the last year and the main advances and achievements of the programs within this period. The main achievements may be summarized in the following activities: Continuation of the irradiation of the first silicide fuel element in the R A3. Completion of the manufacturing of the second silicide fuel element, licensing and beginning of its irradiation in the R A3. Development of the HMD Process to manufacture U-Mo powder (pUMA project). Set up of fuel plates manufacturing at industrial level using U-Mo powder. Preliminary studies and the design for the irradiation of mini plates, plates and full scale fuel elements with U-Mo and 7 g U/cm{sup 3}. PIE destructive studies for the P-04 silicide fuel prototype (accurate burnup determination through chemical analysis, metallography and SEM of samples from the irradiated fuel plates). Improvement and development of new characterization techniques for high density fuel plates quality control including US testing and densitometric analysis of X-ray examinations. The results obtained in this period are encouraging and also allow to foresee a wider participation of CNEA in the international effort to qualify U-Mo as a new material for the manufacturing of research reactor fuels. (author)

  11. Advances and highlights of the CNEA qualification program as high density fuel manufacturer for research reactors

    International Nuclear Information System (INIS)

    Adelfang, P.; Alvarez, L.; Boero, N.; Calabrese, R.; Echenique, P.; Markiewicz, M.; Pasqualini, E.; Ruggirello, G.; Taboada, H.

    2002-01-01

    One of the main objectives of CNEA regarding the fuel for research reactors is the development and qualification of the manufacturing of LEU high-density fuels. The qualification programs for both types of fuels, Silicide fuel and U- x Mo fuel, are similar. They include the following activities: development and set up of the fissile compound manufacturing technology, set up of fuel plate manufacturing, fabrication and irradiation of mini plates and plates, design and fabrication of fuel assembly prototypes for irradiation, post-irradiation examination and feedback for manufacturing improvements. This paper describes the different activities performed within each program during the last year and the main advances and achievements of the programs within this period. The main achievements may be summarized in the following activities: Continuation of the irradiation of the first silicide fuel element in the R A3. Completion of the manufacturing of the second silicide fuel element, licensing and beginning of its irradiation in the R A3. Development of the HMD Process to manufacture U-Mo powder (pUMA project). Set up of fuel plates manufacturing at industrial level using U-Mo powder. Preliminary studies and the design for the irradiation of mini plates, plates and full scale fuel elements with U-Mo and 7 g U/cm 3 . PIE destructive studies for the P-04 silicide fuel prototype (accurate burnup determination through chemical analysis, metallography and SEM of samples from the irradiated fuel plates). Improvement and development of new characterization techniques for high density fuel plates quality control including US testing and densitometric analysis of X-ray examinations. The results obtained in this period are encouraging and also allow to foresee a wider participation of CNEA in the international effort to qualify U-Mo as a new material for the manufacturing of research reactor fuels. (author)

  12. ANL progress on the cooperation with CNEA for the MO-99 production: Base-side digestion process

    International Nuclear Information System (INIS)

    Gelis, A.V.; Quigley, K.J.; Aase, S.B.; Bakel, A.J.; Leyva, A.; Regalbuto, M.C.; Vandergrift, G.F.

    2005-01-01

    Conversion from high-enriched uranium (HEU) to low-enriched uranium (LEU) targets for the Mo-99 production requires certain modifications of the target design, the digestion and the purification processes. ANL and the Argentine Comision Nacional de Energia Atomica (CNEA) are collaborating to overcome all the concerns caused by the conversion of the CNEA process to use LEU foil targets. A new digester with stirring system has been successfully applied for the digestion of the low burn-up U foil targets in KMnO 4 alkaline media. In this paper, we report the progress on the development of the digestion procedure utilizing effective stirring and focusing on minimization of the liquid radioactive waste. (author)

  13. Lab of conservation and restoration of paper collections of CNEA: gamma radiation treatment of books and documents affected by microorganisms

    International Nuclear Information System (INIS)

    Alfaro, Laura; Miranda, Maria V.; Gonzalez, Maria E.; Calvo, Ana M.

    2009-01-01

    In 2005 the CNEA's Laboratory of Conservation and Restoration of Paper Collections was inaugurated at the Ezeiza Atomic Centre. This lab takes advantage of the experience of CNEA in the utilization of the biocide effects of gamma radiation for decontamination and sterilization of different products, mainly medical products. In recent years the application of gamma radiation to the other goods was explored. Gamma radiation can be utilized for disinfection in the case of biological contamination, such as contamination of books and documents by fungi or insects, and in the case of some disasters (inundation or fire controlled with water in libraries and archives) to prevent the growing of fungi and pathogenic bacteria. (author) [es

  14. Towards a strategic line of intellectual capital development for CNEA (Comision Nacional de Energia Atomica de Argentina)

    International Nuclear Information System (INIS)

    Lopez, M.P.; Martinez Demarco, S.; Sbaffoni, Monica; Harriague, Santiago

    2009-01-01

    After an extended stagnation period, during which there was a big staff reduction in the nuclear sector in general and in CNEA in particular, with no new personnel hired, ageing staff and risk of skills and knowledge loss, in 2006 the Argentinean government launched a nuclear power programme based on the necessity of expanding the national energy matrix and taking into account the general concerns about greenhouse effects. The new projects drove to CNEA to the elaboration of a ten year Strategic Plan for CNEA, which includes the activities to be performed during the period 2009-2018. Conceived with wide participation of internal areas, the definition of the strategic plan included objectives, goals, management indicators, and periodical revisions. The Intellectual Capital being a fundamental asset to reach the goals, a chapter on these subject was included, for every knowledge domain. Even if the work is still in progress, partial results and tendencies can be shown. Every area of the organization is working on the analysis of their own strengths and weaknesses in terms of intellectual capital, knowledge loss risk analysis, and definition of future needs in terms of knowledge and skills. Analyzing strengths and weaknesses, there appeared common elements to most of the areas, indicating that besides the use of specific knowledge management, education and training tools, a Strategic Line for Intellectual Capital Development should be quickly implemented, to fill in gaps and protect the current knowledge asset. This presentation summarizes the work done up to now, showing tendencies in the situation, and proposing a strategic line for intellectual capital development, to help solving major staffing problems in CNEA. (author)

  15. Qualification of high-density fuel manufacturing for research reactors at CNEA

    Energy Technology Data Exchange (ETDEWEB)

    Adelfang, P.; Alvarez, L.; Boero, N.; Calabrese, R.; De La Fuente, M.; Echenique, P.; Markiewicz, M.; Pasqualini, E.; Ruggirello, G.; Taboada, H. [CNEA, Buenos Aires (Argentina)

    2001-07-01

    CNEA, the National Atomic Energy Commission of Argentina, is at the present a qualified supplier of uranium oxide fuel for research reactors. A new objective in this field is to develop and qualify the manufacturing of LEU high-density fuel for this type of reactors. According with the international trend Silicide fuel and U-xMo fuel are included in our program as the most suitable options. The facilities to complete the qualification of high-density MTR fuels, like the manufacturing plant installations, the reactor, the pool side fuel examination station and the hot cells are fully operational and equipped to perform all the activities required within the program. The programs for both type of fuels include similar activities: development and set up of the fuel material manufacturing technology, set up of fuel plate manufacturing, fabrication and irradiation of miniplates, fabrication and irradiation of full scale fuel elements, post-irradiation examination and feedback for manufacturing improvements. For silicide fuels most of these steps have already been completed. For U-xMo fuel the activities also include the development of alternative ways to obtain U-xMo powder, feasibility studies for large-scale manufacturing and the economical assessment. Set up of U-xMo fuel plate manufacturing is also well advanced and the fabrication of the first full scale prototype is foreseen during this year. (author)

  16. Molecular epidemiology of norovirus strains in Paraguayan children during 2004-2005: description of a possible new GII.4 cluster.

    Science.gov (United States)

    Galeano, Maria Eugenia; Martinez, Magaly; Amarilla, Alberto A; Russomando, Graciela; Miagostovich, Marize Pereira; Parra, Gabriel I; Leite, José Paulo

    2013-10-01

    Noroviruses (NoV) have been shown to be an important cause of morbidity and mortality in children worldwide, only second after Group A rotaviruses (RVA). In Paraguay, acute gastroenteritis (AGE) is the third cause of mortality in children ≤5 years old. To analyze the presence and diversity of NoV in Paraguayan children ≤5 years old presenting AGE. Three hundred seventy eight fecal samples, negative for pathogenic bacteria and RVA, were collected from children admitted as ambulatory and hospitalized patients in a large private hospital from Asuncion, Paraguay from 2004 to 2005. The presence and diversity of NoV was determined by two different RT-PCR strategies and nucleotide sequencing. One hundred and sixty one samples were positive for NoV by partial amplification of the viral polymerase gene (RdRp). No seasonality or differences in the viral prevalence for the different age-groups were detected. GII and GI NoVs were associated to 58% and 42% of the infections, respectively. The genotype was determined in 18% (29/161) NoV-positive samples. The genotypes detected were: GII.4 (18%), GII.17 (18%), GII.6 (14%), GII.7 (14%), GII.3 (10%), GII.5 (3%), GII.8 (3%), GII.16 (3%), GI.3 (14%) and GI.8 (3%). Amplification of the ORF2 from the GII.4 strains showed the presence of a new GII.4 variant. The results showed a continuous circulation of NoV in children throughout the two years of study and an extensive diversity of genotypes co-circulating, highlighting the need for better surveillance of NoV in Paraguayan children. Copyright © 2013 Elsevier B.V. All rights reserved.

  17. CNEA/ANL collaboration program to develop an optimized version of DART validation and assessment by means of U3 Six and U3 O8-Al dispersed CNEA mini plate irradiation behavior

    International Nuclear Information System (INIS)

    Solis, Diego; Taboada, Horacio; Rest, Jeffrey

    1998-01-01

    The DART code is based upon a thermochemical model that can predict swelling, recrystallization, fuel-meat interdiffusion and other issues related with MTR dispersed FE behavior under irradiation. As a part of a common effort to develop an optimized version of DART, a comparison between DART predictions and CNEA miniplates irradiation experimental data was made. The irradiation took place during 1981-82 for U3O8 miniplates and 1985-86 for U 3 Si x at Oak Ridge Research Reactor. (author)

  18. Brasiguaio Identities: An outcome of the pursuit of land across the Brazilian and Paraguayan shared border region

    Directory of Open Access Journals (Sweden)

    Marcos Estrada

    2017-10-01

    Full Text Available The movement of people between places is far from being a new or isolated phenomenon and is happening more often than before. This is also the case for individuals who moved from Brazil and Paraguay. Based on the existing literature as well as on data gathered in the landless camp Antônio Irmão, also known locally as the ‘Brasiguaios landless camp’ in Itaquiraí in the state of Mato Grosso do Sul, Brazil, this article explains how their search for a piece of land in either Brazil and Paraguay influenced the formation of the Brasiguaios identities. First, I briefly approach the foundation of transnationalism scholarship, which guided my research. Next, I demonstrate how land policies in Brazil and Paraguay, aimed at developing their respective border regions, played a role in the migration of Brazilians to Paraguayan and then the return of a number of them to Brazil. Last, I share the narrative of individuals in the Brasiguaio landless camp in the pursuit of land in either country. At the core of my argument is that the Brasiguaio identities of this landless group result from their pursuit of land rather than from migration processes.

  19. The role of the CNEA like organization of scientific and technological support to accentuate the nuclear security

    International Nuclear Information System (INIS)

    2007-01-01

    The activity developed by the CNEA in this subject from its creation, is based on an attitude responsible in the care for the people, the society and the environment, conduct that has remained after its restructuring in 1994. PEN No 1540/74 decree transferred the nuclear power generation activity to NUCLEOELECTRICA ARGENTINA S.A. and the regulatory activities to the ENTE NACIONAL REGULADOR NUCLEAR, today NUCLEAR REGULATORY AUTHORITY (ARN). The CNEA has the following attributions by Law No 24,804/97 'National Law of the Nuclear Activity', regulator of the Nuclear Activity in the Argentine Republic that it establishes, among other aspects, that the CNEA will have: a) Advising the Executive Power on nuclear policy issues. b) Promoting training of highly specialized human resources, scientific and technological developments in the nuclear field, and including the promotion and development programs for technological innovations. c) Fostering technology transfer programs for the technology that was acquired and developed by the Institution, arid for which the Institution has a patent, in compliance with the non-proliferation commitments signed by the Argentine Republic. d) Exercising the responsibility of radioactive waste management activities as established by the specific law. e) Defining the procedures for decommissioning nuclear energy generation facilities and all other relevant radioactive installations. f) Providing the services requested by nuclear power plants and other nuclear installations. g) Exercising the rights of the National Government on special fissionable materials included in irradiated fuel elements. h) Exercising the rights of property of the National Government on special fusion materials, which are imported or developed in the country. i) Developing, building and operating experimental nuclear reactors. j) Developing uses for radioisotopes and radiation in biological, medical and industrial applications. k) Performing exploration of minerals for

  20. CNEA's (Comision Nacional de Energia Atomica) experience in the preparation of a national system for laboratory accreditation

    International Nuclear Information System (INIS)

    Piacquadio, N.H.; Palacios, T.A.; Casa, V.A.; Koll, J.H.

    1993-01-01

    Within the regional markets, as it is the case of MERCOSUR , the laboratories which are suppliers of test and calibration results, are mutually recognized through the National Accreditation Systems. In Argentina there is a project to create a Center for the Accreditation of Test Laboratories. CNEA, which is involved in the execution of large projects and has adopted quality assurance criteria for a long time, requires for internal and external laboratories to be qualified. At the beginning of this year, a Committee for the Qualification of Laboratories was created in the Research and Development and Fuel Cycle Areas. Its objective was planning, management of documents, coordination, evaluation and quantification of laboratories, according to national IRAM and international ISO standards. This paper analyzes the organization of the system and the methods to evaluate and qualify laboratories as a process of growing up leading to the future National Accreditation System. (author). 3 figs

  1. The CEDICAE and the paper collections conservation and restoration Laboratory at CNEA : present and future organization and projects

    International Nuclear Information System (INIS)

    Calvo, Ana M.; Semino, Maria S.; Romero, Gregoria O.; Alfaro, Laura S.; Miranda, Maria V.; Chinen, Silvia P.

    2009-01-01

    In Ezeiza Atomic Center (CAE), there is a working group formed by staff members from a Documentation and Information Center known as 'Lic. Maria Isabel Gonzalez' (CEDICAE) and from the CNEA Paper Collections Conservation and Restoration Laboratory. New personnel were hired in 2007, which allowed the reorganization of tasks and gave way to the creation of new projects. By conducting weekly morning meetings, the working group decided to organize and plan the activities that had to be conducted. From the first moment, the main objective of the group was to offer a service of excellence, i.e. to provide a duly and timely response to the bibliographical requests made by users, to perform tasks in the laboratory, to train members in diverse subjects of preventive conservation, surveys and evaluations of archives and libraries, and tasks of restoration of our own material and material from third parties. Among the projects carried out by the CEDICAE, the following are included: Firstly, the continuous training and education of its personnel, training of users in topics dealing with the use of the MINCyT Library, participation in the Internal Network of Libraries (REDIN) in order to adopt a joint policy by CNEA libraries, participation in the Network RRIAN (Regional Network of Information for Latin America and the Caribbean in the Nuclear Field), participation in the Federal Network of Libraries and Information, with the National Commission of Public Libraries (CONABIP) and with the Documentation Center of the Ministry of Economy and so on. It has worked in training of personnel working at the institutions that submit requests to the Laboratory (SERPAJ, Monastery of San Francisco, Ministry of Economy, CONABIP, etc) regarding topics of preventive conservation. It has realised a mockup of bibliographical recovery of damaged material after any climate disasters and has conducted surveys and evaluations from the point of view of preventive conservation. In this sense and as an

  2. Evaluation of sexuality in a Paraguayan mid-aged female urban population using the six-item Female Sexual Function Index.

    Science.gov (United States)

    Sánchez, S C; Chedraui, P; Pérez-López, F R; Ortiz-Benegas, M E; Palacios-De Franco, Y

    2016-06-01

    Background There are scant data related to sexuality assessed among mid-aged women from Paraguay. Objective To assess sexual function in a sample of mid-aged Paraguayan women. Methods This was a cross-sectional study in which 265 urban-living women from Asunción (Paraguay) aged 40-65 years were surveyed with the six-item version of the Female Sexual Function Index (FSFI-6) and a questionnaire containing personal and partner data. Results The median age of the sample was 48 years, 48.2% were postmenopausal (median/interquartile range age at menopause 46/13 years), 11.3% used hormone therapy, 37.0% used psychotropic drugs, 44.5% had hypertension, 7.2% diabetes, 46.1% abdominal obesity and 89.4% had a partner (n = 237). Overall, 84.1% (223/265) of surveyed women were sexually active, presenting a median total FSFI-6 score of 23.0, and 25.6% obtained a total score of 19 or less, suggestive of sexual dysfunction (lower sexual function). Upon bivariate analysis, several factors were associated with lower total FSFI-6 scores; however, multiple linear regression analysis found that lower total FSFI-6 scores (worse sexual function) were significantly correlated to the postmenopausal status and having an older partner, whereas coital frequency was positively correlated to higher scores (better sexual function). Conclusion In this pilot sample of urban-living, mid-aged Paraguayan women, as determined with the FSFI-6, lower sexual function was related to menopausal status, coital frequency and partner age. There is a need for more research in this regard in this population.

  3. Plantear utopías: La formación de la comunidad científica: CNEA (1950-1955

    Directory of Open Access Journals (Sweden)

    Zulema Marzorati

    2003-12-01

    Full Text Available En 1950 se creó en la Argentina la Comisión Nacional de Energía Atómica. En ella se fue conformando una comunidad científica que luego de su participación en la Primera Conferencia "Átomos para la Paz" realizada en Ginebra en 1955, fue reconocida por sus pares a nivel internacional. Nuestro objetivo es analizar el desarrollo científico-tecnológico alcanzado en la CNEA por ese conjunto de científicos durante su etapa inicial. En la investigación, además de la utilización de fuentes escritas convencionales y bibliografía, se han realizado entrevistas a científicos nucleares que actuaron en ese período, con la intención de obtener una mayor comprensión sobre las prácticas de los actores sociales y acerca de la relación entre el contexto histórico y la institución.The International Board of Atomic Energy (Comisión Nacional de Energía Atómica - CNEA was created in 1950. In this way a scientific community was established in it. After its participation in The First International Conference "Atoms for Peace" which was held in Geneva in 1955, this scientific community was acknowledged by its peers all over the world. Our aim is to analyze the scientific- technological development achieved by those scientists in the CNEA in its early stages. This investigation has developed conventional written resources, compiled bibliography and has interviewed some nuclear scientists who worked in that period, to achieve a better understanding of the social actors' practice and about the relation between the historical context and the institution.

  4. Production of kits for the labelling with 113sup(m)In and sup(99m)Tc, at the CNEA

    International Nuclear Information System (INIS)

    Palcos, M.C.; Kurcbart, Horacio; Nowotny, G.; Ramos, Elsa; Riesgo, J.G.; Mitta, A.E.A.

    1978-05-01

    The actual state of the production of radiopharmaceuticals in the form of reagents kits at the C.N.E.A. is described. This could allow the users to label compounds with sup(113m)In and sup(99m)Tc in an easy and reproducible way. At present, the following sets are provided routinarily a) To label with sup(99m)Tc: Albumin macroaggregates: calcium gluconate; antimonium sulfide colloid, sodium phytate; sodium calcium DTPA; seroalbumin; sodium pyrophosphate; sodium citrate. b) To label with sup(113m)In: albumin macroaggregates; PVP-bicarbonate; DTPA; human seroalbumin. Regarding products in a developping stage, we have: to labed with sup(99m)Tc: dimercapto-succinic acid, set for the labelling of human erythrocytes, set for sup(113m)In and sup(99m)Tc concentration and bleomicin; to label with sup(113m)In: EDTMP sup(99m)In. (author) [es

  5. Program description for the qualification of CNEA - Argentina as a supplier of LEU silicide fuel and post-irradiation examinations plan for the first prototype irradiated in Argentina

    International Nuclear Information System (INIS)

    Rugirello, Gabriel; Adelfang, Pablo; Denis, Alicia; Zawerucha, Andres; Marco, Agustin di; Guillaume, Eduardo; Sbaffoni, Monica; Lacoste, Pablo

    1998-01-01

    In this report we present a description of the ongoing and future stages of the program for the qualification of CNEA, Argentina, as a supplier of low enriched uranium silicide fuel elements for research reactor. Particularly we will focus on the characteristics of the future irradiation experiment on a new detachable prototype, the post-irradiation examinations (PIE) plan for the already irradiated prototype PO4 and an overview of the recently implemented PIE facilities and equipment. The program is divided in several steps, some of which have been already completed. It concludes: development of the uranium silicide fissile material, irradiation and PIE of several full-scale prototypes. Important investments have been already carried out in the facilities for the FE production and PIE. (author)

  6. Coordination of the U.S. DOE-Argentine National Atomic Energy Commission (CNEA) science and technology implementing arrangement. Final report

    International Nuclear Information System (INIS)

    Ebadian, M.A.

    1998-01-01

    In 1989, the US Department of Energy (DOE) established the Office of Environmental Management (EM) and delegated to the office the responsibility of cleaning up the US nuclear weapons complex. EM's mission has three primary activities: (1) to assess, remediate, and monitor contaminated sites and facilities; (2) to store, treat, and dispose of wastes from past and current operations; and (3) to develop and implement innovative technologies for environmental remediation. To this end, EM has established domestic and international cooperative technology development programs, including one with the Republic of Argentina. Cooperating with Argentine scientific institutes and industry meets US cleanup objectives by: (1) identifying and accessing Argentine EM-related technologies, thereby leveraging investments and providing cost-savings; (2) improving access to technical information, scientific expertise, and technologies applicable to EM needs; and (3) fostering the development of innovative environmental technologies by increasing US private sector opportunities in Argentina in EM-related areas. Florida International University's Hemispheric Center for Environmental Technology (FIU-HCET) serves as DOE-OST's primary technology transfer agent. FIU-HCET acts as the coordinating and managing body for the Department of Energy (DOE)-Argentina National Atomic Energy Commission (CNEA) Arrangement. Activities include implementing standard operating procedures, tracking various technical projects, hosting visiting scientists, advising DOE of potential joint projects based on previous studies, and demonstrating/transferring desired technology. HCET hosts and directs the annual Joint Coordinating Committee for Radioactive and Mixed Waste Management meeting between the DOE and CNEA representatives. Additionally, HCET is evaluating the possibility of establishing similar arrangements with other Latin American countries

  7. Eating Disorders in Paraguayan Adolescents

    Science.gov (United States)

    Ramirez, Maria E.; McIntosh, David E.; Kruczek, Theresa

    2013-01-01

    Eating disorders, once thought to be exclusively a disorder of the more affluent Western countries, are now spreading around the world. Despite the wealth of information on the prevalence of eating disorders in developed countries, epidemiological data for South America is scarce. The 26-item Eating Attitude Test (EAT-26) was used to explore the…

  8. CNEA/ANL collaboration program to develop an optimized version of DART validation and assessment by means of U{sub 3}Si{sub x} and U{sub 3}O{sub 8-}Al dispersed CNEA miniplate irradiation behavior.

    Energy Technology Data Exchange (ETDEWEB)

    Solis, D.

    1998-10-16

    The DART code is based upon a thermomechanical model that can predict swelling, recrystallization, fuel-meat interdiffusion and other issues related with MTR dispersed FE behavior under irradiation. As a part of a common effort to develop an optimized version of DART, a comparison between DART predictions and CNEA miniplates irradiation experimental data was made. The irradiation took place during 1981-82 for U3O8 miniplates and 1985-86 for U{sub 3}Si{sub x} at Oak Ridge Research Reactor (ORR). The microphotographs were studied by means of IMAWIN 3.0 Image Analysis Code and different fission gas bubbles distributions were obtained. Also it was possible to find and identify different morphologic zones. In both kinds of fuels, different phases were recognized, like particle peripheral zones with evidence of Al-U reaction, internal recrystallized zones and bubbles. A very good agreement between code prediction and irradiation results was found. The few discrepancies are due to local, fabrication and irradiation uncertainties, as the presence of U{sub 3}Si phase in U{sub 3}Si{sub 2} particles and effective burnup.

  9. El juicio político en la Constitución paraguaya y la destitución del presidente Fernando Lugo = Impeachment, the paraguayan constitution, and the impeachment of president Fernando Lugo

    Directory of Open Access Journals (Sweden)

    David-Eleuterio Balbuena Pérez

    2013-05-01

    ó ex profeso para enjuiciarle, en la que se denunciaba vulneración de la prohibición de lex praevia, derecho de defensa y debido proceso; y otra contra la resolución de la Cámara de Senadores (sentencia que le condenó por mal desempeño de funciones y le separó del cargo como Jefe de Estado y Jefe de Gobierno, en la que se invocaron los mismos motivos constitucionales de fondo. Finalmente, se concluye con unas reflexiones sobre la naturaleza jurídica del juicio político y, en concreto, sobre la constitucionalidad, validez y legitimidad del juicio político al que fue sometido el Presidente, concluyendo que no fue un juicio político en su verdadero significado constitucional y que pudo verse alterada la libertad política al destituir anticipadamente a un presidente democráticamente elegido, aunque el proceso es plenamente válido y legítimo por cuanto que el control de constitucionalidad ejercido por la Corte Suprema de Justicia ha confirmado su correcto anclaje constitucional. The impeachment that took place in Paraguay on June 21st and 22nd, 2012, led to the removal from office of President Fernando Lugo. It was marked by its speed and swiftness and resulted in the suppression of the due process of law and the President’s right of defense because of his dismissal within only 24 hours. Consequently, the current debate is to determine if the impeachment was a real trial or proceeding, with the required protection of constitutional guarantees, or whether on the contrary, the impeachment was political and should not be covered with such guarantees, allowing the Senate to prosecute the President, establishing timeframes and procedures for each case, without rightly accrediting the accusations that were formulated. To resolve the question, this article analyzes the issue of impeachment as established in the Paraguayan Constitution and its antecedents, providing data of comparative law that regulates impeachment in Argentina, and the opinions of Paraguayan

  10. Technologic spin-off from CNEA's activities

    International Nuclear Information System (INIS)

    Belinco, Cesar G.

    2001-01-01

    An analysis is made of the spin-off of technology from the nuclear activities in Argentina. Several examples are mentioned in fields such as material sciences, non-destructive testing, forensic research, space activities, instrumentation as well as in environmental studies

  11. Technologic spin-off from CNEA's activities; Tecnologias derivadas de las actividades de la CNEA

    Energy Technology Data Exchange (ETDEWEB)

    Belinco, Cesar G [Comision Nacional de Energia Atomica, General San Martin (Argentina). Centro Atomico Constituyentes

    2001-07-01

    An analysis is made of the spin-off of technology from the nuclear activities in Argentina. Several examples are mentioned in fields such as material sciences, non-destructive testing, forensic research, space activities, instrumentation as well as in environmental studies.

  12. Una aproximación a los postgrados e investigación en psicología paraguaya Uma aproximação aos programas de pesquisa e pós-graduação na psicologia paraguaia An approach to graduate and research in paraguayan psychology

    Directory of Open Access Journals (Sweden)

    Norma B. Coppari

    2011-04-01

    questionable quality and of little importance in the academic and profesional context. It requires the implementation and strengthening of educational policies and consistency in the quality of higher education, especially basic, applied and technological research. Noteworthy are the treaties in the formation of MERCOSUR, the creation of ANEAES (2003 for the process of quality accreditation, and the work of the SPPs for the Education Act. The twenty-first century brings the expectation of a paraguayan psychology stronger in its local scientific and practical profile, and able to confront the regional and global challenges.

  13. Paraguayan Language Policy and the Future of Guarani.

    Science.gov (United States)

    Gynan, Shaw N.

    2001-01-01

    In Paraguay, a majority of the population speaks Guarani, an indigenous language. Guarani is a co-official language along with Spanish and bilingual education has been implemented. Despite these positive measures, literacy education in Guarani is limited to urban areas. The challenge is how to find the political will and economic resources to…

  14. Braquitherapy with cesium 137 in gynaecological cancer. First Paraguayan experience

    International Nuclear Information System (INIS)

    Guggiari, A.; Cubillas, M.; Guggiari, P. A. de.; Ocaris, D.; Soteras, N.; Codas Thompson, O.; Gonzalez, H.; Barboza, M.; Pederson, A.

    1997-01-01

    Brachytherapy continues to be a fundamental support in the treatment of cancer of the uterine cervix in the initial stages, as the only treatment or in conjunction with surgery. The percentages of local control in the advanced stages are higher when these two methods are used together instead of alone. It is necessary to implement in all radiotherapy centres of the country safe, efficient and economic brachytherapy services [es

  15. CNEA - Centro Atómico Bariloche

    Science.gov (United States)

    en Ciencia y Tecnología Formación de Recursos Humanos de alto nivel Mapa del sitio Contacto Buscar en la formación de recursos humanos. Leer más: Centro atómico bariloche Próximos Eventos

  16. CONRRAD Project: how CNEA is managing radioactive waste knowledge

    International Nuclear Information System (INIS)

    Vetere, Claudia L.; Gomiz, Pablo R.

    2009-01-01

    The aim of this paper is to introduce CONRRAD Project, which is an initiative of the Knowledge Management Group (GesCon) belonged to the Nuclear Safety and Environment Area, for knowledge preservation of Radioactive Waste Management. It discusses the methodology and the results that have been achieved at present. (author)

  17. Description of ECRI (CNEA'S MTR fuel fabrication plant)

    International Nuclear Information System (INIS)

    Echenique, P.; Fabro, J.; Podesta, D.; Restelli, M.; Rossi, G.; Alvarez, L.; Adelfang, P.

    2002-01-01

    The ECRI Plant is dedicated to the development and fabrication of high-density fuel elements and targets for 99 Mo. In this sector had been done the start up Fuel Elements for the Reactors of Peru, Iran, Algeria and Egypt. All of them were made with U 3 O 8 . The targets for 99 Mo using HEU were fabricated too in the last years. The new material of high-density for Fuel Elements as U 3 Si 2 were done in this sector, three prototypes were fabricated, two are still under irradiation. (P06 and P07). As new developments we are working with U-Mo (7%) Fuel Plates with both material Korean and HMD. This work is under the RERTR Program and two fuel elements, manufactured by us, with both powders, will be irradiated in Petten. For 99 Mo targets, we are fabricating miniplates of LEU with an AlUx powder by pulvi-metallurgy technique. And it is under development the foils targets under the RERTR Program. A general view of the fabrication facilities and control sector will be shown. The different operations that are done in each sector will be explained. All our activities will be certified under the ISO 9000 and we are working hard to get it in the middle of 2003. (author)

  18. An overview of the first years of CNEA, looking towards the future; Una mirada a la CNEA de los primeros anios, con vistas al futuro

    Energy Technology Data Exchange (ETDEWEB)

    Harriague, Santiago; Quilici, Domingo F; Sbaffoni, Maria M [Comision Nacional de Energia Atomica, Buenos Aires (Argentina)

    2006-07-01

    In the framework of growing worries on the future of energy availability for our country, a nuclear activity reactivation plan has been recently announced, with remarkable commitment of national authorities, positive reception by almost all national actors, and important investments to be made. There is a certain resemblance between the current situation and that of the period when nuclear activity was launched, from 1950 to 1970, regarding the variety of the projects to be faced and the amount of resources needed to undertake them. Many of the elements crucial to the success of a nucleo-electric plan continue to be the same, in spite of the fact that they might elicit other courses of action, in the light of the significant changes suffered by our country, the world, and the nuclear activity since then. Looking back, the work accomplished in that first phase can be considered to be successful. It was based on the search of technological autonomy and on the conception of nuclear activities as promoters of development and modernization of the whole industrial sector. These premises led the continuous efforts made towards the development of the human resources, needed not only for nuclear activities but also for other sectors of a growing country, even in the midst of continuous political, economical and institutional crisis. Local providers were developed for a growing number of items, brought forward by the opening of the 'technological packages' involved by major projects, thus achieving a desired high level of national participation in the total work. In this context of similarities and differences with the past, the aim of this work is to revisit the leading ideas that sustained these developments and achievements. (author) [Spanish] En el marco de la preocupacion existente sobre el futuro de la oferta energetica nacional, se ha anunciado recientemente un plan de reactivacion de la actividad nuclear, del cual se destaca el compromiso por parte de las autoridades nacionales, la acogida positiva por parte de la casi totalidad de los sectores de la vida nacional, y la magnitud de las inversiones anunciadas. La situacion actual, la variedad de proyectos a encarar y la magnitud de los recursos requeridos, guardan cierta semejanza con el periodo de lanzamiento de la actividad nuclear en las decadas del 50 al 70. Muchos de los elementos cruciales para dar continuidad a un plan nucleoelectrico siguen siendo los mismos de entonces, independientemente de que sean otras las acciones que puedan llegar a demandar, debido a los cambios significativos ocurridos desde entonces en nuestro pais, el mundo y la actividad nuclear. En perspectiva, el trabajo realizado en esa primera etapa puede considerarse exitoso. Se baso en la busqueda de la autonomia tecnologica y en la concepcion de la actividad nuclear como impulsora del desarrollo y modernizacion del aparato industrial. Aun en un contexto de continuas crisis politicas, economicas e institucionales, se llevo adelante un accionar en pos de la formacion de los recursos humanos necesarios no solo para la actividad nuclear sino tambien para un pais en crecimiento. Se desarrollaron proveedores locales para conjuntos crecientes de items resultantes de la apertura del paquete tecnologico de los grandes proyectos, alcanzandose en las obras realizadas un alto porcentaje de participacion nacional. En este contexto de similitudes y diferencias con el pasado, se planteo como objetivo de este trabajo reseniar las ideas rectoras de ese desarrollo. (autor)

  19. "The implacable deafness of Imperial authorities”: Veterans demands after the Paraguayan War (1870-1889

    Directory of Open Access Journals (Sweden)

    Maria Regina Santos de Souza

    2017-06-01

    Full Text Available After the war in Paraguay, Brazilian government did not care for the rights granted to veterans, such as pensions, public jobs, land and finantial compensation. This became a serious problem for those veterans. Many faced the disorganization and lack of legal knowledge of the state bureaucracy.This article discusses the struggles of Veterans of Ceará for war rights.

  20. Voltage stability evaluation of the Paraguayan system; Evaluacion de la estabilidad de tension del sistema paraguayo

    Energy Technology Data Exchange (ETDEWEB)

    Cardozo Sanchez, Freddy [Mirant Americas (United States); Fernandez Krekeler, Ubaldo [Administracion Nacional de Electricidad (ANDE), Asuncion (Paraguay)

    2001-07-01

    This document presents analyses of permanent status of the ANDE transmission system, seeking to evaluate the voltage stability and impact that would have possible reinforcements in 500 kV. The transmission under this new voltage level, besides to be a reinforcement to the system for satisfying the national demand, will permit the increase of energy exportation to Brazil, depending on the adopted reinforcement. The system current status and its evolution according to the planning of short and medium period are analysed. In the voltage stability evolution, static analysis techniques to draw the Q-V and P-V curves were used, as well as for determination of the system self-values and stability margins.

  1. An overview of the first years of CNEA, looking towards the future

    International Nuclear Information System (INIS)

    Harriague, Santiago; Quilici, Domingo F.; Sbaffoni, Maria M.

    2006-01-01

    In the framework of growing worries on the future of energy availability for our country, a nuclear activity reactivation plan has been recently announced, with remarkable commitment of national authorities, positive reception by almost all national actors, and important investments to be made. There is a certain resemblance between the current situation and that of the period when nuclear activity was launched, from 1950 to 1970, regarding the variety of the projects to be faced and the amount of resources needed to undertake them. Many of the elements crucial to the success of a nucleo-electric plan continue to be the same, in spite of the fact that they might elicit other courses of action, in the light of the significant changes suffered by our country, the world, and the nuclear activity since then. Looking back, the work accomplished in that first phase can be considered to be successful. It was based on the search of technological autonomy and on the conception of nuclear activities as promoters of development and modernization of the whole industrial sector. These premises led the continuous efforts made towards the development of the human resources, needed not only for nuclear activities but also for other sectors of a growing country, even in the midst of continuous political, economical and institutional crisis. Local providers were developed for a growing number of items, brought forward by the opening of the 'technological packages' involved by major projects, thus achieving a desired high level of national participation in the total work. In this context of similarities and differences with the past, the aim of this work is to revisit the leading ideas that sustained these developments and achievements. (author) [es

  2. Inspection experience with RA-3 spent nuclear fuel assemblies at CNEA's central storage facility

    International Nuclear Information System (INIS)

    Novara, Oscar; LaFuente, Jose; Large, Steve; Andes, Trent; Messick, Charles

    2000-01-01

    Aluminum-based spent nuclear fuel from Argentina's RA-3 research reactor is to be shipped to the Savannah River Site near Aiken, South Carolina, USA. The spent nuclear fuel contains highly enriched uranium of U.S. origin and is being returned under the US Department of Energy's Foreign Research Reactor/Domestic Research Reactor (FRR/DRR) Receipt Program. An intensive inspection of 207 stored fuel assemblies was conducted to assess shipping cask containment limitations and assembly handling considerations. The inspection was performed with video equipment designed for remote operation, high portability, easy setup and usage. Fuel assemblies were raised from their vertical storage tubes, inspected by remote video, and then returned to their original storage tube or transferred to an alternate location. The inspections were made with three simultaneous video systems, each with dedicated viewing, digital recording, and tele-operated control from a shielded location. All 207 fuel assemblies were safely and successfully inspected in fifteen working days. Total dose to personnel was about one-half of anticipated dose. (author)

  3. Description of the PIE facility for research reactors irradiated fuels in CNEA

    International Nuclear Information System (INIS)

    Bisca, A.; Coronel, R.; Homberger, V.; Quinteros, A.; Ratner, M.

    2002-01-01

    The PIE Facility (LAPEP), located at the Ezeiza Atomic Center (CAE), was designed to carry out destructive and non-destructive post-irradiation examinations (PIE) on research and power reactor spent fuels, reactor internals and other irradiated materials, and to perform studies related with: Station lifetime extension; Fuel performance; Development of new fuels; and Failures and determination of their causes. LAPEP is a relevant facility where research and development can be carried out. It is worth mentioning that in this facility the PIE corresponding to the Surveillance Program for the Atucha I Nuclear Power Plant (CNA-1) were successfully performed. Materials testing during the CNA-1 repair and the study of failures in fuel element plugs of the Embalse Nuclear Power Plant (CNE) were also performed. (author)

  4. Staying report of Lic. Mirtha Gamba from (Cnea - Argentina) energetic minerals department

    International Nuclear Information System (INIS)

    Lara Vigil, P.

    1988-01-01

    The visit of the Lic.Gamba to our country, it was oriented to realise a completion of the geochemical sampling by uranium and other elements of interest to clear in lands of the Crystalline basament and the training of the taking of alluvium samples. The tasks were developed so much in cabinet as in field. Besides it were made visits to the laboratories where take place the preparation of samples, chemical analyses and petrography. Also were visited the laboratories of physical analyses in the D.N.T.N (Direction National of Nuclear technology) that it is mounted in DI.NA.MI.GE. And the exit of field was realised to visit two zones worked by the uranium program during years 1985-1987, Valle Chico (Photo-plan Alferez) and Puntas del Mataojo

  5. Description of the CNEA U308 powder production plant for low enrichment fuel plates

    International Nuclear Information System (INIS)

    Boero, N.L.; Celora, J.; Parodi, C.A.; Pertossi, F.R.; Marajofsky, A.

    1987-01-01

    The design of the 20% enriched U 3 O 8 powder production plant was based on laboratory level experiments. The UF 6 hydrolysis, ADU precipitation, U 3 O 8 conversion processes were used. The equipment, controls and confinement were set not only by the processes but also by safety requirements according to the kind and physical form of the uranium compounds in each stage and criticality considerations. This paper describes the installation, set up and operation of the plant during production. (Author)

  6. CNEA developments in U-Mo-ZrY-4 mini plates and plates fabrication process

    International Nuclear Information System (INIS)

    López, M.; Picchetti, B.; Gonzalez, A.; Taboada, H.

    2013-01-01

    The Uranium Molybdenum alloy was the material chosen to develop the fabrication of high density nuclear fuel, due to its excellent behaviour under irradiation –a consequence of the metastable bcc crystalline structure-. At present, the study is focused on the application of this alloy to monolithic fuel plate development, which fuel core is a thin U-Mo layer. The Zircalloy-4 (Zry-4) alloy used as cladding material is extensively known in the nuclear industry due to its low neutron capture section efficiency and excellent mechanical and corrosion resistance properties. Miniplates fabrication process involves a welded compact made of two Zry-4 covers and a frame surrounding a monolithic U-Mo core, which is co rolled under high temperature. Molybdenum contains of 7% to 10% (mass) in U Mo alloys guarantees the presence of meta-stable bcc gamma phase and, at the same time, does not penalize the neutron economy due to Mo98 presence. In the case of U Mo monolithic miniplates relevant parameters of fabrication, considering the behaviour of the U-Mo alloys reported in many work and in order to optimize the o-rolling process, have been revised: co-rolling temperature, compressive stress and presence of gap. Under this experimental conditions can be studied the the interdiffusion layer, the binding between materials and the Dog Bone. The experimental results shows that 650ºC is an optimal co-rolling temperature; at higher temperatures not only a bigger interdiffusion layer is observed –this phenomenon can lead to a region enriched in Molybdenum- but also a bigger Dog Bone is obtained. Working at higher compressive stress has the same effect in relation to the interdiffusion layer. In addition, the absence of gases in the core is essential for the correct binding of the materials. Concerning the monolithic U-Mo plates fabrication, involved in the ALT FUTURE experiment a new workshop has been conditioned. The aim is to use all the valuable information collected during. (author) [es

  7. CARACTERIZACIÓN NEUROPSICOLÓGICA DE NIÑOS ESCOLARES PARAGUAYOS / NEUROPSYCHOLOGICAL CHARACTERIZATION OF PARAGUAYANS SCHOOLCHILDREN

    OpenAIRE

    Yulia Solovieva; Laura Schneider Becker; Luis Quintanar Rojas; Gregorio García Aguilar

    2017-01-01

    En el estudio se reportan resultados de la evaluación neuropsicológica de niños/as paraguayos de primero, segundo y tercer grado escolar sin problemas de aprendizaje mediante la “Evaluación Neuropsicológica Infantil Breve” (Solovieva & Quintanar, 2009), con el objetivo de caracterizar el desempeño de una población infantil regular ante la evaluación neuropsicológica cualitativa. El análisis de los resultados se ejecutó a través de pruebas no paramétricas para identificar las diferencias entre...

  8. Novel plumage aberrations in Paraguayan non-Passerine Birds, and the definition of a new plumage aberration unique to Psittacidae

    Directory of Open Access Journals (Sweden)

    Paul Smith

    2017-07-01

    Full Text Available Anomalous plumage colourations are reported for three species of non-passerine birds from Paraguay, Limpkin (Aramaus guarauna; Aramidae, Nanday Parakeet (Nandayus nenday; Psittacidae, and the Little Woodpecker (Veniliornis passerinus; Picidae. A leucistic Limpkin is the first published report of a colour anomaly for the family Aramidae. The colour aberration in N. nenday is hypothesised to be a result of an excess of red psittacofulvin pigments, which are unique to the Psittacidae. Although the mechanisms causing this colour aberration remain unknown, we suggest the term psittacofulvism for the phenotypic effect observed.

  9. Cognitive Development and Home Environment of Rural Paraguayan Infants and Toddlers Participating in Pastoral del Nino, an Early Child Development Program

    Science.gov (United States)

    Peairson, Shannon; Austin, Ann M. Berghout; de Aquino, Cyle Nielsen; de Burro, Elizabeth Urbieta

    2008-01-01

    Participants included 106 infants and toddlers living in rural Paraguay and their primary caregiver. Children ranged in age from birth to 24 months and belonged to two distinct groups, including 46 children who had never participated in Pastoral del Nino, an early child development program, and 60 children who had participated in Pastoral for at…

  10. Methodology for solving the problem of contamination in pencils of Co-60 from the CNEA (Argentine) for the recharge of the gamma irradiator of the ININ

    International Nuclear Information System (INIS)

    Villarreal B, J.E.; Escobar A, L.; Angeles C, A.; Cruz G, H.S.

    1992-07-01

    Presently report the methodology used to identify the source of contamination detected in a shipment with 5.0 X 10 Bq of Co-60 coming from Argentina is described, as well as the solution outlined to solve the problem. Its are presented by way of conclusion the experiences but outstanding learned in the process. (Author)

  11. Neutron activation analysis and ICP-AES to determine metal traces in antarctic krill. CNEA laboratories participation in the certification of a reference material

    International Nuclear Information System (INIS)

    Smichowski, Patricia N.; Farias, Silvia S.; Resnizky, Sara M.; Marrero, Julieta G.

    1999-01-01

    For the international certification of a reference material based on krill, As and Hg were determined by instrumental neutron activation analysis and Br, Co and Se by radiochemical neutron activation analysis. Inductive coupling plasma atomic emission spectrometry (ICP-AES) was used to determine Cu, Fe, Mn, and Zn. The results, which are in good agreement with those obtained by other laboratories, are discussed

  12. Staying report of Lic. Mirtha Gamba from (Cnea - Argentina) energetic minerals department[Study of Uranium prospection in Uruguay]; Informe sobre la estadia de la Lic. Mirta Gamba (CNEA-Argentina) en el departamento de Minerales energeticos. en noviembre de 1988: Objetivos y actividades realizadas

    Energy Technology Data Exchange (ETDEWEB)

    Lara Vigil, P

    1988-07-01

    The visit of the Lic.Gamba to our country, it was oriented to realise a completion of the geochemical sampling by uranium and other elements of interest to clear in lands of the Crystalline basament and the training of the taking of alluvium samples. The tasks were developed so much in cabinet as in field. Besides it were made visits to the laboratories where take place the preparation of samples, chemical analyses and petrography. Also were visited the laboratories of physical analyses in the D.N.T.N (Direction National of Nuclear technology) that it is mounted in DI.NA.MI.GE. And the exit of field was realised to visit two zones worked by the uranium program during years 1985-1987, Valle Chico (Photo-plan Alferez) and Puntas del Mataojo.

  13. Taxonomic analysis of Paraguayan samples of Homonota fasciata Duméril & Bibron (1836 with the revalidation of Homonota horrida Burmeister (1861 (Reptilia: Squamata: Phyllodactylidae and the description of a new species

    Directory of Open Access Journals (Sweden)

    Pier Cacciali

    2017-08-01

    Full Text Available Homonota is a Neotropical genus of nocturnal lizards characterized by the following combination of characters: absence of femoral pores, infradigital lamellae not dilated, claws without sheath, inferior lamellae laterally not denticulate, and presence of a ceratobranchial groove. Currently the genus is composed of 10 species assembled in three groups: two groups with four species, and the fasciata group with only two species. Here, we analyzed genetic and morphologic data of samples of Homonota fasciata from Paraguay; according to Maximum Likelihood and Bayesian inference analyses, the Paraguay population represents an undescribed species. Additionally, morphological analysis of the holotype of H. fasciata (MNHN 6756 shows that it is morphologically different from the banded, large-scaled Homonota commonly referred to as “H. fasciata”. Given the inconsistency between morphological characters of the name-bearing type of H. fasciata and the species commonly referred to as H. fasciata, we consider them as different taxa. Thus, H. fasciata is a species inquirenda which needs further studies, and we resurrect the name H. horrida for the banded, large-scaled Homonota. The undescribed species from Paraguay is similar to H. horrida, but can be differentiated by the high position of the auditory meatus relative to the mouth commissure (vs. low position in H. horrida; and less developed tubercles on the sides of the head, including a narrow area between the orbit and the auditory meatus covered with small granular scales with or without few tubercles (vs. several big tubercles on the sides of the head even in the area between the orbit and the auditory meatus. The new species is distributed in the Dry Chaco in South America. With the formal description of this species, the actual diversity of the genus Homonota is increased to 12 species. Furthermore, we infer phylogenetic relationships for 11 of the 12 described species of the genus, based on 11 molecular markers (two mitochondrial and nine nuclear genes, with concatenated and species tree approaches.

  14. Area Handbook Series: Paraguay: A Country Study

    Science.gov (United States)

    1988-12-01

    interna- tionally popular; lyrics in Spanish and Guarani were a hallmark of Paraguayan culture. 64 The Society and Its Environment Sociolinguist Joan...the Paraguayan econo- my in the 1980s was Guillermo F. Peroni and Martin Burt’s Paraguay: Laws and Economy. Two more critical essays were Ricardo

  15. Annual report and balance 2007; Memoria y balance 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2007 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  16. Fifty years contribution to research and technological development of Argentina. Part 6

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2004-01-01

    The paper is the sixth part of a short history of the National Atomic Energy Commission (CNEA). The international relations and the nuclear technology exports of the CNEA are reviewed. A short description of the Argentine nuclear centers and nuclear enterprises is also given. The present structure of the CNEA is briefly outlined. (author)

  17. Annual report and balance 2002

    International Nuclear Information System (INIS)

    2003-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2002 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  18. Annual report and balance 2001

    International Nuclear Information System (INIS)

    2002-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2001 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  19. Annual report and balance 2007

    International Nuclear Information System (INIS)

    2008-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2007 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  20. Annual report and balance 2006; Memoria y balance 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2006 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  1. Annual report and balance 2006

    International Nuclear Information System (INIS)

    2007-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2006 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  2. Annual report and balance 2005; Memoria y balance 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2005 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  3. Annual report and balance 2001; Memoria y balance 2001

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2001 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  4. Annual report and balance 2002; Memoria y balance 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2002 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  5. Annual report and balance 2004

    International Nuclear Information System (INIS)

    2005-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2004 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  6. Annual report and balance 2005

    International Nuclear Information System (INIS)

    2006-01-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2005 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes

  7. Annual report and balance 2004; Memoria y balance 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    A summary of the research, development, services and production activities of the National Atomic Energy Commission (CNEA) of Argentina is given as well as details of management resources together with the evolution of the budget. The activities of the CNEA related companies during 2004 are also outlined. A special mention is made of the activities of the three CNEA educational and training institutes.

  8. The role of Nicotiana gluca Graham (paraguayan herbs as an adjuvant in immunomodulation of Newcastle disease vaccine for broilers Estudo da ação de Nicotiana glauca Graham (erva paraguaia como coadjuvante em vacina contra a doença de Newcastle em frangos de corte

    Directory of Open Access Journals (Sweden)

    Fabiane Pereira Gentilini

    2008-07-01

    Full Text Available The Nicotiana glauca is a native plant species from Argentina, but found all over South América, being used against headaches, rheumatism, injuries, ulcers, and so on. Researchers have considered it as having immunomodulation effect. This study was conducted to investigate the use of a aqueous extract of Nicotiana glauca Graham as an immunomodulator (adjuvant of a Newcastle disease vaccine.. A total of 56 broilers were distributed into 4 experimental groups. Each one of them received 3 dosages of this vaccine with or without the addition of different concentrations of the extract Using hemmoaglutination inhibition techniques , the results have shown differences (P<0.05 in the third sera collection. An increase in the antibody titer with the inclusion of 5 mg/dosage of the extract (Treatment 3 as compared to 1 mg/dosage (Treatment 2 and 10 mg/dosage of the extract (Treatment 4 was observed, However, birds from Treatment 3 did not differ (P> 0.05 from Treatment 1. These results indicated that further investigations are required, including the use of cytotoxicity tests in vitro, to evaluate the immunomodulation effect of this extract.

     

    KEY WORDS: Immunomodulation effect, Nicotiana glauca Graham, vaccine.

    A Nicotiana glauca Graham é uma espécie nativa da Argentina, bem distribuída na América do Sul, sendo empregada, popularmente, contra dores de cabeça, dores reumáticas, cicatrização de feridas e úlceras, entre outros. Pesquisas têm avaliado a sua ação na potencialização da resposta imune. Assim, com este estudo, buscou-se avaliar a ação de um extrato aquoso de Nicotiana glauca Graham como coadjuvante imunológico em uma vacina contra a doença de Newcastle (DNC. Utilizaram-se 56 frangos de corte, distribuídos em quatro grupos experimentais, que receberam três doses da vacina, com ou sem adição de diferentes quantidades do extrato. Os resultados sorológicos, obtidos através do teste de inibição da hemaglutinação, demonstraram diferença estatística (P<0,05 aos 60 dias de idade dos frangos, com incremento dos níveis de anticorpos contra a DNC, quando houve a inclusão de 5 mg/dose (Tratamento 3 do extrato, em relação à inclusão de 1 mg/dose (Tratamento 2 e 10 mg/dose (Tratamento 4, do mesmo extrato, porém sem diferir estatisticamente do controle (Tratamento 1. Estes resultados estimulam a realização de outros trabalhos, incluindo a realização do teste de citotoxicidade in vitro deste extrato, a fim de avaliar a sua ação efetiva como um coadjuvante imunológico.

     

    PALAVRAS-CHAVES: Coadjuvante imunológico, Nicotiana glauca Graham, vacina.

  9. The role of Nicotiana gluca Graham (paraguayan herbs) as an adjuvant in immunomodulation of Newcastle disease vaccine for broilers Estudo da ação de Nicotiana glauca Graham (erva paraguaia) como coadjuvante em vacina contra a doença de Newcastle em frangos de corte

    OpenAIRE

    Fabiane Pereira Gentilini; Telmo Vidor; Rogério Freitag; Marcos Antônio Anciuti; Caren Gularte Quincozes; Marlete Brum Cleff; Geferson Fischer; Carlos Eduardo Nogueira

    2008-01-01

    The Nicotiana glauca is a native plant species from Argentina, but found all over South América, being used against headaches, rheumatism, injuries, ulcers, and so on. Researchers have considered it as having immunomodulation effect. This study was conducted to investigate the use of a aqueous extract of Nicotiana glauca Graham as an immunomodulator (adjuvant) of a Newcastle disease vaccine.. A total of 56 broilers were distributed into 4 ...

  10. La 'función' de 1796 y la matanza de Mbayás en Concepción, frontera norte paraguaya The 'Performance' of 1796 and slaughter of Mbayás in Concepción, North Paraguayan border

    Directory of Open Access Journals (Sweden)

    Nidia R. Areces

    2007-12-01

    Full Text Available El trabajo indaga la "función del 15 de mayo de 1796" que aconteció en la frontera norte de la Gobernación Intendencia del Paraguay en el marco de una permanente conflictividad y cuyas consecuencias trascendieron el ámbito local. La condición de frontera étnica y militarizada perfiló en Concepción la existencia de una membresía comunitaria pero generó, al mismo tiempo, espacios propicios para la violencia. ?Cuáles fueron en este espacio social las fuentes de conflictos? ?Fueron el acceso a la tierra, la política con los indios, los acuerdos con la comandancia, el contrabando, las competencias entre familias, las adhesiones políticas? Estas son preguntas que se abordarán al problematizar este caso puntual teniendo en cuenta los recientes aportes sobre sociedades de frontera. Para ello se señalarán sus causas y se analizará su naturaleza observando el rol del Estado y buscando los links entre violencia y sociedad a partir del entramado inicial hasta el impulso etnologizante de enfrentarse a "los otros".The paper focuses on the "function of May 15th, 1796", taking place in the north frontier of the Gobernación Intendencia de Paraguay, in a situation of permanent conflict, whose consequences transcended the local sphere. In Concepción the condition of ethnic and militarized frontier shaped the existence of a community membership but, at the same time, created favorable spaces for violence. Which were the sources of conflict in this social space? Were they access to land, policies towards the Indians, agreements with the Command, smuggling, rivalry among families and political adherence? We will focus on these questions when analyzing this particular case, taking into account recent contributions on frontier societies. To this end, we will point out their causes and analyze their nature, considering the role of the State and looking for the links between violence and society from the initial framework to the ethnologizing impulse of facing "the others".

  11. The occurrence and evolution of nectar extraction apparatus among Hymenoptera ‘Symphyta'. Jervis, M. & Vilhelmsen, L

    DEFF Research Database (Denmark)

    Vilhelmsen, Lars

    2000-01-01

    Takeuchi). CNEA of some type or other has arisen at least twice within the family Tenthredinidae and at least twice within the pergid subfamily Euryinae. Evolutionary parallelism in CNEA structure has occurred between the basal, ‘symphytan', hymenopteran lineages and the Apocrita, a phenomenon hitherto...

  12. The creation of the Argentine Atomic Energy Commission

    International Nuclear Information System (INIS)

    Marzorati, Zulema del V.

    2000-01-01

    After a mention to the Argentine regulation of 1945 concerning the export of uranium ores and a short description of the 'Richter affair', the decree 10936 of 1950, that creates the Argentine Atomic Energy Commission (CNEA) , is analyzed. The activities of the CNEA between the years 1952 - 1955 are also outlined

  13. BIPM comparison BIPM.RI(II)-K1.Eu-152 of activity measurements of the radionuclide 152Eu for the VNIIM (Russia), the LNE-LNHB (France) and the CNEA (Argentina), with linked results for the COOMET.RI(II)-K2.Eu-152 comparison

    International Nuclear Information System (INIS)

    Michotte, C.; Ratel, G.; Courte, S.; Kharitonov, I.A.; Zanevsky, A.V.; Terechtchenko, E.E.; Moune, M.; Aubineau-Laniece, I.; Bobin, C.; Arenillas, P.; Balpardo, C.

    2014-01-01

    Three new participants in the BIPM.RI(II)-K1.Eu-152 comparison have been added to the previous results and this has produced a revised value for the key comparison reference value (KCRV), calculated using the power-moderated weighted mean. A link has been made to the COOMET.RI(II)-K2.Eu-152 comparison held in 2010 through the VNIIM who participated in both comparisons. Three National Metrology Institutes (NMIs) used the K1 or K2 comparisons to update their degree of equivalence. The degrees of equivalence between each equivalent activity measured in the International Reference System (SIR) and the KCRV have been calculated and the results are given in the form of a table for four NMIs in the BIPM.RI(II)-K1.Eu-152 comparison, three participants in the COOMET.RI(II)-K2.Eu-152 comparison and the 18 other participants in the previous CCRI(II)-K2.Eu-152 comparison. A graphical presentation is also given. (authors)

  14. Methodology for solving the problem of contamination in pencils of Co-60 from the CNEA (Argentine) for the recharge of the gamma irradiator of the ININ; Metodologia para resolver el problema de contaminacion en lapices de Co-60 procedentes del CONEA (Argentina) para la recarga del irradiador gamma del ININ

    Energy Technology Data Exchange (ETDEWEB)

    Villarreal B, J.E.; Escobar A, L.; Angeles C, A.; Cruz G, H.S

    1992-07-15

    Presently report the methodology used to identify the source of contamination detected in a shipment with 5.0 X 10 Bq of Co-60 coming from Argentina is described, as well as the solution outlined to solve the problem. Its are presented by way of conclusion the experiences but outstanding learned in the process. (Author)

  15. Potentialities for the diversification of the energy matrix of the National Center for Applied Electromagnetism

    International Nuclear Information System (INIS)

    Berenguer Ungaro, Mónica Rosario; Yero, Douglas Deás; López Juanes, Pedro; Areas Gilar, Ramón; Prada Sánchez, Jorge; Hernández Rodríguez, Norma Rafaela

    2017-01-01

    The objective of this work is to evaluate the potential for the diversification of the energy matrix of the National Center for Applied Electromagnetism, CNEA. This evaluation were realize through Three steps . In the first step, were determinated the demand for electricity from the CNEA, the electric bill were the source of information. In the second step, were identified the possible locations, for instalation of the solar panels.the third step, were calculated what percentage of the demand for electrical energy the CNEA that could be covered by the generation with this photovoltaic panels . As a result, five possible locations were identified, all on the CNEA roof. With the proposition we can cover between a 35 and 78% of the demand of CNEA electrical energy. It was recommended to continue with the technical-economic study in order to present a project for the search of the financing. (author)

  16. First report of Schulzia travassosi (Nematoda, Trichostrongylina, Molineoidea) for amphibians of the Chaco region in Argentina and proposal of Oswaldocruzia melanostictusi nov. comb.

    Science.gov (United States)

    González, Cynthya E; Hamann, Monika I

    2015-12-01

    This is the first record of the nematode parasite Schulzia travassosi (Trichostrongylina, Molineidae) in two Argentinean amphibians, Leptodactylus bufonius and Rhinella major, collected in two localities of the Chaco region, Las Lomitas (Formosa Province) and Taco Pozo (Chaco Province). The species was observed using light and scanning electron microscopy (SEM) and compared with previous studies of Paraguayan specimens. Regarding metric characters, the measurements found in Argentinean specimens generally did not differ from those of Paraguayan specimens; some differences were observed in the total length of males and females (some longer and some shorter than Paraguayan specimens), length of the oesophagus (in almost all specimens shorter than in Paraguayan ones) and position of the vulva (nearer to posterior end in Argentinean specimens). The branches and sphincter of ovejector are slightly longer than in Paraguayan female specimens. In males, ray 4 is almost the same length as rays 2, 3 and 5, 6. Cephalic end, cephalic vesicle, synlophe and vulvar depression were viewed under SEM. Schulzia melanostictusi Chopra, Shing and Kumar, 1986 is reassigned as Oswaldocruzia melanostictusi (Chopra, Shing and Kumar, 1986) nov. comb.

  17. Democracy and Representation in Paraguay

    Directory of Open Access Journals (Sweden)

    Liliana Rocío Duarte-Recalde

    2017-05-01

    Full Text Available This article reviews the electoral accountability dimension as a constitutive mechanism of Paraguayan democracy since 1989, analyzing the factors that limit the representation contained in the administration of the Paraguayan government as a result of the electoral process. We provide an analytic contrast between the democratic principles that guide the Paraguayan electoral institutions and the way their designs are enforced, identifying the gap between formal and informal rules as determinants of political representation. We also describe the barriers that prevent effective access of the population to political participation and competition, the advantages possessed by traditional political parties and interest groups, as well as their implications for democracy. We also review the degree to which elected officials are representative of historically excluded social groups as a result, emphasizing the way women, indigenous and peasant communities have potentially limited power to exercise political influence due to limitations to participation by structural and institutional factors.

  18. Electricity law for the Paraguay Republic: an analysis of the proposed regimen; Ley de electricidad para la Republica del Paraguay: un analisis del regimen propuesto

    Energy Technology Data Exchange (ETDEWEB)

    Cardozo Filho, Carlos M.; Brasa Soto, Ruben E. [Usina Hidroelectrica de Itaipu, Asuncion (Paraguay)

    2001-07-01

    In September 2000 the Energy Ministry concluded the elaboration of the electricity law for the Paraguayan electrical system, which should be exposed for its corresponding analysis, approval and promulgation. In this direction, this present work makes a detailed analysis of that, having as premise the following main points: aspects of its elaboration; proposed structure; opening of the Paraguayan electrical market; external interferences; businesses opportunities; protection to the consumers; protection to the investors and other relevant themes. Finally, the work is concluded presenting some suggestions and recommendations.

  19. Production of MO-99 from LEU targets-base-side processing

    International Nuclear Information System (INIS)

    Vandegrift, George F.; Koma, Yoshikazu; Cols, Hector; Conner, Cliff; Aase, Scott; Peter, Magdalin; Walker, David; Leonard, Ralph A.; Snelgrove, James L.

    2000-01-01

    Argonne National Laboratory (ANL) is cooperating with the Argentine Comision Nacional de Energia Atomica (CNEA) to convert their 99 Mo production process, which uses high enriched uranium (HEU), to low-enriched uranium (LEU). Progress discussed in this year's paper includes optimization of (1) the digestion of LEU foil by sodium hydroxide solution and (2) the primary recovery of molybdenum by anion exchange. Also discussed are ANL/CNEA plans for demonstrating the irradiation and digestion of LEU-foil targets and recovering 99 Mo in Argentina later this year. Our results show that, up to this point in our study, conversion of the CNEA process to LEU appears viable. (author)

  20. Annual report 1986-87

    International Nuclear Information System (INIS)

    1987-01-01

    This report issued by the Argentine National Atomic Energy Commission (CNEA) covers the two-year period 1986-1987. It describs the research and development carried out in the following fields: nuclear power plants; supplies to nuclear power plants; radioisotopes and radiations; radiological protection and nuclear safety; research and development. In the item general aspects other activities performed by CNEA are included, and in the associated firms with CNEA information on the technological development, and goods and services production is provided. (M.E.L.) [es

  1. Fifty years contribution to research and technological development of Argentina. Part 3

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2001-01-01

    This paper is the third part of a short history of the National Atomic Energy Commission (CNEA). The activities concerning the radioisotope and radiation applications are reviewed as well as the radiation protection program

  2. Training of manpower resources at the National Atomic Energy Commission of Argentina

    International Nuclear Information System (INIS)

    Ambrosis de Libanati, Nelly

    1982-01-01

    The main factors that influenced the development of the manpower resources required by CNEA over its thirty years of life are discussed: a careful specialized training; basic and applied research groups as a basic support for the other activities; teams responsible for the applications and for the concrete realizations of increasing complexity carried out by CNEA, culminating with the nuclear power plants; CNEA's relations with the national educational system regarding nuclear specialization; CNEA's international interaction, either by the participation of foreigners in its internal courses, by the commissioning of Argentinians abroad, and by the cooperation with international agencies in organizing courses, seminars and conferences; the influence of the radiological protection and nuclear safety requirements on the training programs, on nuclear industry, and on the users of radioisotopes and radiations; the importance of feeding the results of each activity back into the system so as to obtain a dynamic programming adapted to the requirements at all times. (M.E.L.) [es

  3. Status of plutonium recycle from mixed oxide fuel fabrication wastes (U,Pu)O2 facility activities

    International Nuclear Information System (INIS)

    Quesada, Calixto A.; Adelfang, Pablo; Greiner, G.; Orlando, Oscar S.; Mathot, Sergio R.

    1999-01-01

    Within the specific subject of mixed oxides corresponding to the Fuel Cycle activities performed at CNEA, the recovery of plutonium from wastes originated during tests and pre-fabrication stages is performed. (author)

  4. Politically explosive

    International Nuclear Information System (INIS)

    Anon.

    1979-01-01

    Argentina will award the concession for 'ATUCHA II' to KWU even without an agreement on a heavy-water system. A declaration of interest will soon be signed by KWU and the Argentine atomic energy commission, CNEA. (RW) [de

  5. Institutional results of the Argentine Graduate Programme in Radiochemistry

    International Nuclear Information System (INIS)

    Cohen, I.M.

    2006-01-01

    The evolution of radiochemistry at the National Atomic Energy Commission (CNEA) in Argentina is analyzed. The antecedents of the establishment, in 1998, of the Master Programme in Radiochemistry, jointly organized by CNEA and the Buenos Aires Regional Faculty of the National Technological University are revised, and the structure of the Programme is described. On the basis of the thesis works, the initial trends are discussed. Finally, the institutional results of the Programme are described. (author)

  6. Argentinean activities related to Fast Reactors

    International Nuclear Information System (INIS)

    Azpitarte, Osvaldo

    2012-01-01

    CNEA objectives in the area of Generation IV nuclear reactors: Implement a programme for the monitoring of the global progress of new technologies for Generation IV nuclear reactors and their fuel cycles, in order to generate and assess associated lines of R&D. – Perform studies and evaluations for defining the Generation IV line or lines on which CNEA would be interested; – Promote the participation on specific international projects; – Implementation of experimental facilities

  7. Fixing tools of targets for radioisotope production in the RA10

    International Nuclear Information System (INIS)

    Peirone, M.; Coleff, A.; Chasseur, A.

    2012-01-01

    The RA-10 project is about the design and construction of a reactor for radioisotopes production and scientific research in the nuclear area. Most of the reactor design comes from INVAP SE, however some of the design job was performed in CNEA, i.e. the so called Outer Core Experimental Devices (DEEN) and their interfaces with the Reflector Tank were designed in CNEA and the documentation of the basic design was recently released (author)

  8. Information for irradiation and post-irradiation of the silicide fuel element prototype P-07

    International Nuclear Information System (INIS)

    Abbate, Maximo J.; Sbaffoni, Maria M.

    2003-01-01

    Included in the 'Silicides' Project, developed by the Nuclear Fuels Department of the National Atomic Energy Commission (CNEA), it is foreseen the qualification of this type of fuel for research reactors in order to be used in the Argentine RA-3 reactor and to confirm the CNEA as an international supplier. The paper presents basic information on several parameters corresponding to the new silicide prototype, called P-07, to be taken into account for its irradiation, postirradiation and qualification. (author)

  9. Production of irradiated bone derivatives for odontology and traumatology

    International Nuclear Information System (INIS)

    Martin, Hugo R.; Murature, D.A.

    2004-01-01

    In 2003, the National Atomic Energy Commission (CNEA), the Industrial Human Tissue Processing Plant of the Cordoba University and the Cordoba Science Agency analyzed the joint installation and operation of a Gamma Radiosterilization Module for the production of sterile human bone tissues as allografts for odontology and traumatology. The irradiation procedures were developed at the CNEA's Ezeiza Atomic Center. The irradiated bone tissues are being used in odontology with an excellent clinical behaviour. (author)

  10. Medical applications of the nuclear energy

    International Nuclear Information System (INIS)

    Ugarte, Valentin E.

    2001-01-01

    The Nuclear Medicine School Foundation, in Mendoza (Argentina) was created in 1986 by the National Atomic Energy Commission (CNEA) and is supported by the Government of the Mendoza Province, the CNEA, and the National University of Cuyo. The main activities of the school are medical diagnosis using nuclear techniques and the training of physicians and technicians in nuclear medicine. Teletherapy and brachytherapy are also performed. The use of the PET is described in some detail

  11. Bordasia Krapov., new Malvaceae genus

    Directory of Open Access Journals (Sweden)

    Antonio Krapovickas

    2003-01-01

    Full Text Available Bordasia bicornis Krapov. new genus and species is described from northwestern ParaguayanChaco. It is related to Sida from which it differs by the mericarp with two apical horns, by theleaves dimorphic and coriaceous and by the fannel-shaped calyx

  12. Attitudes Toward Guarani and Spanish: A Pilot Study in Paraguay.

    Science.gov (United States)

    Rhodes, Nancy C.

    This study analyzes the language attitudes of the Paraguayan people toward their two languages, Guarani and Spanish. To study the bilingual situation in the South American country, a pilot survey was carried out in the capital city addressing the major topics of language attitudes, language usage, and language varieties. The goals of the survey…

  13. Dos caminos del mestizaje lingüístico

    NARCIS (Netherlands)

    Gómez Rendón, J.

    2012-01-01

    The chapu shimi and the jopará are two mixed verieties. These are a product of a centennial contact of Spanish and an indigenous language, the Ecuadorian kichwa and the Paraguayan guaraní. The two mixed varieties, however, exhibit diametrically opposed configurations, where lexical and structural

  14. Actio Libera in Causa in Paraguay in the light of the german penal dogmatic: a decision between criminal policy and the legality principlempire to Republic.

    Directory of Open Access Journals (Sweden)

    César A. Cañete Prette

    2016-08-01

    Full Text Available The Paraguayan Criminal Code prescribes culpability as a necessary condition for the imposition of a sanction/punishment. Likewise, in its art. 23, it establishes that, whoever at the moment of the commission of a crime or offense, by cause of a grave perturbation to its consciousness, is not aware of the anti-juridical nature of its acts, shall be deemed irreproachable, and henceforth shall be free from the imposition of a sanction. Given that said norm does not contemplate an exemption, this allows the perpetrator to escape the ius puniendi, when he/she purposefully provokes the state of irreproachability to perpetrate the planned act. This is the problem which the actio libera in causa seeks to provide an answer for. The application of the said theory is however neither anchored in the Paraguayan doctrine or case law. Under this considerations, the present article seeks to contribute to this discussion by carrying out a legal analysis of the application of the action libera in causa in the light of the theories discussed in the German criminal law scholarship, looking to shed light on the potential legal consequences that the application or rejection of the action libera in causa would have considering the current state of the Paraguayan criminal laws/Paraguayan criminal legal system.

  15. Occurrence of Toxoplasma gondii antibodies in Lowland Tapirs (Tapirus terrestris) maintained ex-situ in Brazil and Paraguay

    Science.gov (United States)

    Exposure to Toxoplasma gondii, by the presence of antibodies to the parasite, was documented in 47 Brazilian tapirs (Tapirus terrestris) maintained ex-situ in 10 Brazilian and in one Paraguayan Institution. One animal had samples collected on two occasions (November 2010 and October 2011), and 19 (4...

  16. Validation of Neutron Calculation Codes and Models by means of benchmark cases in the frame of the Binational Commission of Nuclear Energy. Probabilistic Models

    International Nuclear Information System (INIS)

    Dos Santos, Adimir; Siqueira, Paulo de Tarso D.; Andrade e Silva, Graciete Simões; Grant, Carlos; Tarazaga, Ariel E.; Barberis, Claudia

    2013-01-01

    In year 2008 the Atomic Energy National Commission (CNEA) of Argentina, and the Brazilian Institute of Energetic and Nuclear Research (IPEN), under the frame of Nuclear Energy Argentine Brazilian Agreement (COBEN), among many others, included the project “Validation and Verification of Calculation Methods used for Research and Experimental Reactors . At this time, it was established that the validation was to be performed with models implemented in the deterministic codes HUEMUL and PUMA (cell and reactor codes) developed by CNEA and those ones implemented in MCNP by CNEA and IPEN. The necessary data for these validations would correspond to theoretical-experimental reference cases in the research reactor IPEN/MB-01 located in São Paulo, Brazil. The staff of the group Reactor and Nuclear Power Studies (SERC) of CNEA, from the argentine side, performed calculations with deterministic models (HUEMUL-PUMA) and probabilistic methods (MCNP) modeling a great number of physical situations of de reactor, which previously have been studied and modeled by members of the Center of Nuclear Engineering of the IPEN, whose results were extensively provided to CNEA. In this paper results of comparison of calculated and experimental results for critical configurations, temperature coefficients, kinetic parameters and fission rates evaluated with probabilistic models spatial distributions are shown. (author)

  17. Validation of Neutron Calculation Codes and Models by means of benchmark cases in the frame of the Binational Commission of Nuclear Energy. Criticality Experiments

    International Nuclear Information System (INIS)

    Dos Santos, Adimir; Siqueira, Paulo de Tarso D.; Andrade e Silva, Graciete Simões; Grant, Carlos; Tarazaga, Ariel E.; Barberis, Claudia

    2013-01-01

    In year 2008 the Atomic Energy National Commission (CNEA) of Argentina, and the Brazilian Institute of Energetic and Nuclear Research (IPEN), under the frame of Nuclear Energy Argentine Brazilian Agreement (COBEN), among many others, included the project “Validation and Verification of Calculation Methods used for Research and Experimental Reactors . At this time, it was established that the validation was to be performed with models implemented in the deterministic codes HUEMUL and PUMA (cell and reactor codes) developed by CNEA and those ones implemented in MCNP by CNEA and IPEN. The necessary data for these validations would correspond to theoretical-experimental reference cases in the research reactor IPEN/MB-01 located in São Paulo, Brazil. The staff of the group Reactor and Nuclear Power Studies (SERC) of CNEA, from the argentine side, performed calculations with deterministic models (HUEMUL-PUMA) and probabilistic methods (MCNP) modeling a great number of physical situations of de reactor, which previously have been studied and modeled by members of the Center of Nuclear Engineering of the IPEN, whose results were extensively provided to CNEA. In this paper results for critical configurations are shown. (author)

  18. Validation of Neutron Calculation Codes and Models by means of benchmark cases in the frame of the Binational Commission of Nuclear Energy. Kinetic Parameters, Temperature Coefficients and Power Distribution

    International Nuclear Information System (INIS)

    Dos Santos, Adimir; Siqueira, Paulo de Tarso D.; Andrade e Silva, Graciete Simões; Grant, Carlos; Tarazaga, Ariel E.; Barberis, Claudia

    2013-01-01

    In year 2008 the Atomic Energy National Commission (CNEA) of Argentina, and the Brazilian Institute of Energetic and Nuclear Research (IPEN), under the frame of Nuclear Energy Argentine Brazilian Agreement (COBEN), among many others, included the project “Validation and Verification of Calculation Methods used for Research and Experimental Reactors . At this time, it was established that the validation was to be performed with models implemented in the deterministic codes HUEMUL and PUMA (cell and reactor codes) developed by CNEA and those ones implemented in MCNP by CNEA and IPEN. The necessary data for these validations would correspond to theoretical-experimental reference cases in the research reactor IPEN/MB-01 located in São Paulo, Brazil. The staff of the group Reactor and Nuclear Power Studies (SERC) of CNEA, from the argentine side, performed calculations with deterministic models (HUEMUL-PUMA) and probabilistic methods (MCNP) modeling a great number of physical situations of de reactor, which previously have been studied and modeled by members of the Center of Nuclear Engineering of the IPEN, whose results were extensively provided to CNEA. In this paper results of comparison of calculated and experimental results for temperature coefficients, kinetic parameters and fission rates spatial distributions are shown. (author)

  19. Antecedents of historical evolution of the uranium resources in the Cuyo region, between 1951 and 1968

    International Nuclear Information System (INIS)

    Vergara Bai, A.A.

    1992-01-01

    The present article pretends to summarize the initial stage of the development of national uranium resources - focusing the labor done by the Escuela Superior de Ingenieria en Combustible of the Universidad Nacional de Cuyo - between the years 1951 and 1955 - feeling that it is necessary to describe the situations that were originated during the development of the uranium's mineral investigation. This was started by the Escuela Superior de Ingenieria en Combustible of U.N. de Cuyo, which facilitated the connection with CNEA, that had been created in 1950. This leaded to the economical help from CNEA until 1955, for the realization and execution of the programmed works. The national antecedents are described, taking into account the existence of deposits in this country. The historical evolution of the exloration of uranium in Cuyo is divided in three periods, which are described in detail in this work. First and foremost, the period that goes from 1951 to 1955 (U.N. de Cuyo and CNEA); then, the period that goes from 1956 to 1961 (CNEA) where the achievements obtained determined the new modern structures done by the CNEA in order to continue with the development of the uranium resources of the country. After this, the period that goes from 1961 to 1968 (activities and successes of the West Delegation) is pointed out. Finally, the evolution of the factories of uranium mineral treatment, i n the period between 1952 and 1990, is also described in this article. (Author) [es

  20. Institucionalizar la escritura del pasado. La Academia Paraguaya de la Historia (1937-1965

    Directory of Open Access Journals (Sweden)

    Brezzo, Liliana M.

    2016-06-01

    Full Text Available This article analyzes the process of foundation and institutional life of the Paraguayan Academy of History (formerly Paraguayan Institute of Historical Research as a way to account for the development of writing in Paraguay’s History in the twentieth century. Attempt to distinguish the conditioning factors on the practice of History and examine the role of the Academy in the process of institutionalization of the discipline.Este artículo analiza el proceso de fundación de la Academia Paraguaya de la Historia (antes Instituto Paraguayo de Investigaciones Históricas y su vida institucional como vía para dar cuenta del desarrollo de la escritura de la historia en Paraguay en el siglo XX. Pretende distinguir los condicionantes en la práctica de la historia y examinar el rol de la Academia en el proceso de institucionalización de la disciplina.

  1. Argentinian Experience and Perspectives for Small and Medium Sized Reactors. Annex I

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2013-12-15

    The National Atomic Energy Commission (CNEA) was created on 31 May 1950. It was responsible for all nuclear activities in the country until 1994. In 1994, the regulatory body and the operational activities of nuclear power plants were separated. A utility named Nucleoelectrica Argentina (NASA) was created. The present missions of the CNEA are: - To assist the national Government in nuclear policy; - To provide research and development in nuclear areas, including nuclear power plants, research reactors and nuclear fuel cycles; - To provide spent fuel and radioactive waste management, decommissioning of nuclear and radioactive installations, and environmental remediation; - By itself or through related companies, to provide radioisotopes for medicine and industry, and provide services to nuclear power plants and conventional industries. Development of human resources is yet another important objective of CNEA activities.

  2. Annual report and balance 2003; Memoria y balance 2003

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This annual report presents the CNEA's (National Atomic Energy Commission) activities during the year 2003. The first part is devoted to the general objectives and accomplishments of the Organization. The second part describes the programs and projects in different fields such as reactors and nuclear power plants, fuel cycle, radioactive waste management, radioisotopes and radiation, research and development in basic sciences and engineering, decommissioning of nuclear installations, etc. The evolution of the human resources and the training activities are outlined in the third part of the report. The CNEA's nuclear centers are described in part 4 and the technical assistance services and production activities in part 5. Nuclear safety and safeguards are covered in the 6th section. Parts 7 and 8 present the information on inter institutional affairs and on the CNEA related enterprises respectively. The last part is the financial accounting.

  3. Annual report and balance 2003

    International Nuclear Information System (INIS)

    2004-01-01

    This annual report presents the CNEA's (National Atomic Energy Commission) activities during the year 2003. The first part is devoted to the general objectives and accomplishments of the Organization. The second part describes the programs and projects in different fields such as reactors and nuclear power plants, fuel cycle, radioactive waste management, radioisotopes and radiation, research and development in basic sciences and engineering, decommissioning of nuclear installations, etc. The evolution of the human resources and the training activities are outlined in the third part of the report. The CNEA's nuclear centers are described in part 4 and the technical assistance services and production activities in part 5. Nuclear safety and safeguards are covered in the 6th section. Parts 7 and 8 present the information on inter institutional affairs and on the CNEA related enterprises respectively. The last part is the financial accounting

  4. Trafficking in Persons Report

    Science.gov (United States)

    2009-06-01

    people Burmese Lu kon ku de Trade in people French La traite des personnes The trade of people Japanese Jinshin bai bai The buying and selling of...commercial sex among young men. In 2008, the government partially funded an NGO to conduct an anti-trafficking awareness campaign in cinemas and in...A significant number of Japanese women and girls have also been reported as sex trafficking victims. During the last year, a number of Paraguayan

  5. Vocal patterns of adult females and juveniles Caiman yacare (Crocodilia: Alligatoridae in Brazilian Pantanal wetland

    Directory of Open Access Journals (Sweden)

    Fernando L. Sicuro

    2013-09-01

    Full Text Available The Paraguayan caiman (Caiman yacare is the main Caimaninae species occurring in the Brazilian Pantanal Wetland. Despite the relative availability of works focused on biology and conservation of the Paraguayan caiman, almost nothing is known about its vocal structure and behavior. We recorded aggressive calls of adult caiman females guarding nests and, afterwards, the distress calls of the new born juvenile caimans in seasonally flooded areas of the Nhecolândia (Southern Pantanal. The results of both observations and sonographic analyses diverged from studies with other crocodilian species. Aggressive vocalization of adult females of the Paraguayan caiman was longer and more complex than the same vocalization of larger Alligatoridae species. Vocalizations of the young caimans presented interspecific differences with other crocodilian offsprings. Moreover, we found statistically significant intraspecific variation in the distress call structure among different pods, even separated by few kilometers. Differences in distress call structure were tested by Canonical Discriminant Analysis (CDA. We obtained the squared Mahalanobis distances between the acoustic multivariate spaces of each pod provided by the CDA and compared with the geographic distance between the bays of origin of each pod through Mantel Test. The geographic distance by itself did not explain the differences found in the structure of the vocalization of young caimans from different pods. The adult females of Paraguayan caiman positively responded to playbacks of calls from juvenile caimans from pods of other regions, as well as to rough imitations of distress call. Since the adult caimans showed protective responses to quite heterogeneous vocalizations of distress by juveniles, we hypothesized that the variation in the distress call pattern may be associated to a low specificity in sound recognition by adult caimans.

  6. Notes on the distribution of the genus Pseudopaludicola Miranda-Ribeiro, 1926 (Anura: Leptodactylidae) in Paraguay

    OpenAIRE

    Lavilla, Esteban; Caballero-Gini, Andrea; Bueno-Villafañe, Diego; Cardozo, Darío

    2016-01-01

    Four species of Pseudopaludicola, Pseudopalud­icola boliviana, P. falcipes, P. mystacalis and P. ternetzi, are usually cited for Paraguay. However, after analyzing 407 specimens assigned to this genus in herpetological collections of the country, we conclude that there are no specimens of P. falcipes in Paraguayan collections or vouchers cited in the literature, and almost all individuals referred to P. ternetzi are most probably P. ameghini. At the same time, a recently described species, P....

  7. Reptilia, Gymnophthalmidae, Micrablepharus maximiliani (Reinhardt and Lutken, 1861: Distribution extension, new state record and geographic distribution map.

    Directory of Open Access Journals (Sweden)

    Moura, M. R.

    2010-01-01

    Full Text Available We provide records for Micrablepharus maximiliani from state of Minas Gerais and present a map representingits distribution. The record of M. maximiliani from municipality of Resplendor, Minas Gerais, represents a distributionextension of 1,050 km southern from the type locality at the municipality of Maruim, Sergipe. Others 57 new recordsare presented based on specimens housed in several Brazilian and Paraguayan herpetological collections, improving theknowledge on geographic distribution of M. maximiliani in South America.

  8. Distribution and status of the Rufous-tailed Jacamar Galbula ruficauda (Aves: Galbulidae in Paraguay

    Directory of Open Access Journals (Sweden)

    Silvia Centrón

    2016-12-01

    Full Text Available Rufous-tailed Jacamar Galbula ruficauda is known from few records in Paraguay, all during the last 20 years. The species has been recorded in the northern Chaco and Paraguayan Pantanal, with all confirmed records from Alto Paraguay department. Here we summarise all reports and localities of the species in Paraguay to date. The species is categorized as Data Deficient at the national level, but may be more widely distributed than is currently recognised.

  9. Operator training for the Yacyreta binational hydroelectric power plant; Formacion de operadores para la Central Hidroelectrica de Yacireta

    Energy Technology Data Exchange (ETDEWEB)

    Dure, Francisco; Tachella, Heriberto [Entidad Binacional Yacyreta, Isla Yacireta (Paraguay). Central Hidroelectrica Yacyreta]. E-mail: yacyreta@internet.siscotel.com

    1998-07-01

    This work is oriented to the power plant operators, by exposing the criteria and methods adopted for operators selection, training and incorporation to the Yacyreta Hydroelectric Power Plant. The used criteria considered some aspects, as follows: the operation staff should be consisted of equal numbers of Argentine and Paraguayan nationalities, viewing the both systems operation; experience of the shift supervisors in operating a plant for a minimum of 10 years; the supervisors should participate training the auxiliary operators.

  10. U.S. Training for Latin American Militaries: Avoiding An Internal Security Role Creep

    Science.gov (United States)

    2012-04-01

    being integrated in the “ Sistema Nacional” as one unit that reported to the President.47 In this model there is more civilian and military...with Paraguayan military officer, 13 March 2012. 31. Ibid. 32. Ibid. 33. Carlos Marcelo Aquino. " Operativo medico con ayuda de EEUU llega a...sampedranos." Ultima Hora, 14 November 2010. http://www.ultimahora.com/notas/377434- Operativo -medico- con-ayuda-de-EEUU-llega-a-sampedranos 34

  11. ¿Dónde están los medios públicos en América Latina?

    DEFF Research Database (Denmark)

    Tufte, Thomas

    2011-01-01

    At this moment Paraguay’s Government is taking actions to rethink the concept of public media in the whole country. This article takes this context to describe three basic perspectives to re-conceptualize the media scenario of Latin America on the xxi Century. First, it places the Paraguayan init...... a call about the context of globalization and network society as fundamental agents that had influence in politics and in the national public media practices....

  12. ¿Dónde están los medios públicos en América Latina?

    DEFF Research Database (Denmark)

    Tufte, Thomas

    2011-01-01

    At this moment Paraguay’s Government is taking actions to rethink the concept of public media in the whole country. This article takes this context to describe three basic perspectives to re-conceptualize the media scenario of Latin America on the xxi Century. First, it places the Paraguayan init...... a call about the context of globalization and network society as fundamental agents that had influence in politics and in the national public media practice...

  13. Towards an indigenous dwelling that limits the domestic infestation by Triatoma infestans

    Directory of Open Access Journals (Sweden)

    Maria Auxiliadora Arrom

    2017-01-01

    Full Text Available Introduction: The Paraguayan State has a pending debt with indigenous people regarding public policies to combat extreme poverty, in addition to serious health problems, such as Chagas disease with Triatoma infestans as its vector. Objective: To determine the characteristics of an improved dwelling that limits the domestic infestation by Triatoma infestans from the indigenous perspective. Methodology: A descriptive study with a quantitative and qualitative approach was conducted. The instruments of data collection were: household survey, focus groups, and in-depth interviews with key actors. Results: Household heads of 270 dwelling were surveyed, of which 85% (230 had nonresistant or solid or waste materials in at least one of the components or at all. 86.3% (233 of the heads of household indicated that they wanted to improve them, and the lack of sufficient income for the household could be considered the main limitation. Conclusions: When projecting graphically the ideal or improved housing, from their perspective, the studied indigenous families showed that the housing of the Mennonites and the so-called Paraguayans (non-indigenous Paraguayan population inhabiting the same area gathered the physical characteristics that set the boundaries to limit the accommodation of the vector, and were adequate for the environment.

  14. Grafting of Porous Polymers for Biological Applications

    Energy Technology Data Exchange (ETDEWEB)

    Smolko, E. E. [Comisión Nacional de Energía Atómica, Buenos Aires (Argentina); Grasselli, M. [Dpto. LaMaBio, Dpto. de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires (Argentina)

    2009-07-01

    Research on application of radiation processing to polymers is mainly focused by the National Atomic Commission (CNEA). The Agricultural and Industrial Applications Laboratory Unit operates at the Ezeiza Atomic Center since the end of 1980s. Since 1997 a new research group headed by Dr. O. Cascone and Dr. M. Grasselli, devoted to downstream processing of proteins from the University of Buenos Aires, was involved in the implementation of grafting techniques in collaboration with Dr. E. Smolko from CNEA. In 1999 Dr. M. Grasselli moved to the Universidad Nacional de Quilmes where he continued working on application of gamma radiation to materials for biotechnological process. (author)

  15. Grafting of Porous Polymers for Biological Applications

    International Nuclear Information System (INIS)

    Smolko, E.E.; Grasselli, M.

    2009-01-01

    Research on application of radiation processing to polymers is mainly focused by the National Atomic Commission (CNEA). The Agricultural and Industrial Applications Laboratory Unit operates at the Ezeiza Atomic Center since the end of 1980s. Since 1997 a new research group headed by Dr. O. Cascone and Dr. M. Grasselli, devoted to downstream processing of proteins from the University of Buenos Aires, was involved in the implementation of grafting techniques in collaboration with Dr. E. Smolko from CNEA. In 1999 Dr. M. Grasselli moved to the Universidad Nacional de Quilmes where he continued working on application of gamma radiation to materials for biotechnological process. (author)

  16. An outline of the application of an environmental management system to the PRAMU (Uranium Mining Environmental Restitution Project)

    International Nuclear Information System (INIS)

    Smetniansky de De Grande, Nelida; Avila Cadena, Guadalberto; Cardozo, Damian

    2000-01-01

    In Argentina the National Atomic Energy Commission (CNEA) has the responsibility to restore uranium mining facilities, when milling operations have been shut down. To carry out this clean up actions CNEA created the Project for Uranium Mining Environmental Restoration (PRAMU in Spanish). To take into account the environmental aspects of the restoration activities, the PRAMU includes in its management an Environmental Management System (SGA in Spanish), which is of central importance in determining the environmental policy, objectives and targets. In this work a general view of the Environmental Management System is presented and an example of one of the environmental programs to be implemented is detailed. (author)

  17. Characteristics of the Institute of Technology 'Prof. Jorge A. Sabato'; Caracteristicas del Instituto de Tecnologia 'Prof. Jorga A. Sabato'

    Energy Technology Data Exchange (ETDEWEB)

    Galvele, Jose R [Comision Nacional de Energia Atomica, General San Martin (Argentina). Centro Atomico Constituyentes

    2001-07-01

    A historical survey is made of the educational and training activities in metallurgy and material sciences carried out by the CNEA since 1962, that were the origin of the 'Prof. Jorge A. Sabato' Institute. Today the Institute, created by the CNEA in association with the National University of General San Martin, is preparing Engineers in Material Sciences and Masters and Ph. D. in Material Sciences and Technology (Mention in Physics and Material). The curricula of the studies are described in detail. The Information Center annexed to the Institute is also described.

  18. An outline of the application of an environmental management system to the PRAMU (Uranium Mining Environmental Restitution Project); Ejemplo de aplicacion de un sistema de gestion ambiental en el PRAMU: Proyecto de Restitucion Ambiental de la Mineria del Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Smetniansky de De Grande, Nelida; Avila Cadena, Guadalberto; Cardozo, Damian [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Unidad Ejecutora del Proyecto PRAMU

    2000-07-01

    In Argentina the National Atomic Energy Commission (CNEA) has the responsibility to restore uranium mining facilities, when milling operations have been shut down. To carry out this clean up actions CNEA created the Project for Uranium Mining Environmental Restoration (PRAMU in Spanish). To take into account the environmental aspects of the restoration activities, the PRAMU includes in its management an Environmental Management System (SGA in Spanish), which is of central importance in determining the environmental policy, objectives and targets. In this work a general view of the Environmental Management System is presented and an example of one of the environmental programs to be implemented is detailed. (author)

  19. Characteristics of the Institute of Technology 'Prof. Jorge A. Sabato'

    International Nuclear Information System (INIS)

    Galvele, Jose R.

    2001-01-01

    A historical survey is made of the educational and training activities in metallurgy and material sciences carried out by the CNEA since 1962, that were the origin of the 'Prof. Jorge A. Sabato' Institute. Today the Institute, created by the CNEA in association with the National University of General San Martin, is preparing Engineers in Material Sciences and Masters and Ph. D. in Material Sciences and Technology (Mention in Physics and Material). The curricula of the studies are described in detail. The Information Center annexed to the Institute is also described

  20. Implementation of the utilization program for the fuel elements of the Atucha I nuclear power plant

    International Nuclear Information System (INIS)

    Martin, H.R.; Serra, O.H.; Parker, Alejandro

    1981-01-01

    The programming operation for the use of the fuel elements in the Atucha-1 nuclear power plant was initially under the responsibility of the KWU Company, as part of the services rendered due for the manufacturing of said elements. This job was done with the help of the TRISIC program, developed in the early seventies by CNEA and SIEMENS staff. From april 21, 1979 on, CNEA took over the responsibility and strategy of the interchange of fuel elements. The several stages carried out for the implementation of this service are detailed. (M.E.L.) [es

  1. The Argentine nuclear policy: evaluation and proposals of the National Atomic Energy Commission

    International Nuclear Information System (INIS)

    2001-01-01

    The document summarizes de medium term plan for the nuclear activities of the country proposed to the Government by the National Atomic Energy Commission (CNEA). An analysis of the present situation is followed by the consideration of the main topics: nuclear power generation, regulatory activities, fuel cycle, radioisotopes and ionizing radiations, radioactive wastes and spent fuels, research, development and human resources, international relations, and the role of the CNEA and its associate companies in the implementation of the plan. A short review is made of the economical aspects of the Argentine nuclear sector

  2. The consolidation of the Bariloche Atomic Center: an approach from the development of the experimental physics

    International Nuclear Information System (INIS)

    Garcia, Marisa C.; Reising, Ailin M.

    2002-01-01

    The paper investigates the origins of the Center and of the Institute of Physics 'Jose Antonio Balseiro' from the reconstruction of the experimental research programs that were developed between the years 1955 and 1962 in those organizations of the Argentine Atomic Energy Commission (CNEA). Within that intention the paper analyzes the scientific policy of the Institute of Physics and its relations with the CNEA as well as the strategy of resolution of the economic and institutional crisis that affected them between 1958 and 1959. Its incidence in the consolidation of the research programs is also examined

  3. Training courses for Latin American human resources in subjects related to RERTR program

    International Nuclear Information System (INIS)

    Perez, T.E.; Harriague, S.; Perez, E.E.

    1987-01-01

    Between 1984 and 1986, the Atomic Energy Commission of Argentina organized three post-graduate courses on research reactors, aimed at the Latin American region. Twenty one university graduates from Brazil, Colombia, Chile, Mexico, Peru, Uruguay and Venezuela, and six from Argentina, attended the courses. Lecturers were in all cases staff members of CNEA. These activities of Manpower Development in the Latin American Region are part of an overall program starting in the early sixties at CNEA's Development Branch. The interest shown by many Latin American countries in these courses, the technical training received and the technical cooperation established among the participants, are taken as a measure of the success obtained. (Author)

  4. Annual report 1983

    International Nuclear Information System (INIS)

    1985-01-01

    The advances in the execution of the Argentine Nuclear Program, performed by the National Atomic Energy Commission (CNEA) during 1983 are reported. The information is grouped in six sections: Nuclear Power Plants, Supplies to Nuclear Power Plants, Radioisotopes and Radiations, Research and Development, Radiological Protection and Nuclear Safety, and Infrastructure and General Aspects. (M.E.L.) [es

  5. Fifty years contribution to research and technological development of Argentina. Part 7

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2004-01-01

    The paper is the seventh part of a short history of the National Atomic Energy Commission (CNEA). The future of the nuclear activities in the country is outlined, mainly of those related to the energy generation. The completion of the Atucha II nuclear power plant now under construction is supported. (author)

  6. Fifty years contribution to research and technological development of Argentina. Part 4

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2003-01-01

    The paper is the forth part of a short history of the National Atomic Energy Commission (CNEA). The activities concerning the radioactive waste management are reviewed as well as the research and development programs in the sciences related to nuclear energy. (author)

  7. Fifty years contribution to research and technological development of Argentina. Part 1

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2001-01-01

    The paper is the first part of a short history of the Argentine National Atomic Energy Commission (CNEA). The activities concerning the fuel cycle are reviewed. The uranium production as well as the manufacturing of nuclear fuel elements is described. (author)

  8. Fifty years contribution to research and technological development of Argentina. Part 5

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2003-01-01

    The paper is the fifth part of a short history of the National Atomic Energy Commission (CNEA). The activities concerning the development of the institutional infrastructure and the education and training activities are reviewed as well as the legal and regulatory aspects of nuclear energy in Argentina. (author)

  9. Fifty years contribution to research and technological development of Argentina. Part 2

    International Nuclear Information System (INIS)

    Aguirre, Fernando; Boselli, Alfredo; Colangelo, Luis J.; Coll, Jorge A.; Espejo, Hector; Mattei, Clara E.; Ornstein, Roberto M.; Palacios, Tulio A.; Radicella, Renato; Rodrigo, Felix

    2002-01-01

    The paper is the second part of a short history of the Argentine National Atomic Energy Commission (CNEA). The activities concerning research reactors are reviewed as well as the nuclear power program. The heavy water program is also is described. (author)

  10. Production of radionuclides and radiopharmaceuticals at the Argentine Atomic Energy National Commission

    International Nuclear Information System (INIS)

    Mitta, A.E.A.; Bonetto, Oscar; Kurcbart, Horacio; Mancini, Alberto; Marquez, R.O.; Palcos, M.C.; Quihillalt, E.L.; Salas, G.N.B. de; Suner, A.A.; Troparevsky, M.L.P. de.

    1978-03-01

    The production of radionuclides and radiopharmaceuticals at the CNEA is described, as well as the preparation of reagent's sets, and informations is given on the preparation of Tc-99m and In-113m generators. Some figures of the production of 1974-1976 are given. (author) [es

  11. First national meeting of magnetic resonance and hyperfine interactions

    International Nuclear Information System (INIS)

    1985-07-01

    Works performed at CNEA's: Magnetic Resonance Division; Moessbauer Spectroscopy; Solid State Physics Division; Nuclear magnetic Resonance Laboratory and Theoretical Physics Group; Mossbauer Spectroscopy Group; Nuclear Quadrupole Resonance; Physics and Materials Group; Perturbed Angular Correlation and Moessbauer Spectroscopy and Physics Department. (M.E.L.) [es

  12. INFOBECA'97

    International Nuclear Information System (INIS)

    Alvarez, Gustavo A.

    1997-01-01

    The publication collects the progress reports of the works performed in 1997 at the Ezeiza Atomic Center in the framework of the fellowship program of the National Atomic Energy Commission (CNEA) of Argentina. The reports cover activities in radiopharmacy, isotope and radiation applications, life sciences, geology, waste management as well as material sciences

  13. Annual Report 1980

    International Nuclear Information System (INIS)

    1982-01-01

    The advances in the execution of the Argentine Nuclear Program, performed by CNEA during 1980, are reported. The information is grouped in six sections: Nuclear Power Plants, Supplies to Nuclear Power Plants, Radioisotopes and Radiations, Research and Development, Radiological Protection and Nuclear Safety, and Infrastructure and General Aspects. (M.E.L.) [es

  14. JPRS Report Nuclear Developments

    Science.gov (United States)

    1988-09-02

    cracks in Atucha I were detected during the administration of Eng Alberto Constantini. Last year Constantini resigned as CNEA president due to...days, Finance Minister Mailson da Nobrega, Mines and Energy Minis- ter Aureliano Chaves, and Planning Minister Joao Batista de Abreu should be

  15. Proceedings of the tenth scientific meeting at Bahia Blanca, 2-6 november 1981

    International Nuclear Information System (INIS)

    1984-06-01

    Compilation of 64 short papers by different authors, arranged in 5 sections, including the following groups of subjects: experimental reactors; instrumentation and control; nuclear and radiological safety; radioisotopes and radiations; nuclear power plants, and quality assurance. These papers deal with developments carried out at the National Atomic Energy Commission (CNEA) and firms related to Nuclear Programme. (R.J.S.) [es

  16. Computational study of the influence of mirror parameters on FRC (field-reversed configuration) equilibria:

    International Nuclear Information System (INIS)

    Fuentes, N.O.; Sakanaka, P.H.

    1990-01-01

    Field-reversed configuration equilibria are studied by solving the Grad-Shafranov equation. A multiple coil system (main coil and end mirrors) is considered to simulate the coil geometry of CNEA device. First results are presented for computed two-dimensional FRC equilibria produced varying the mirror coil current with two different mirror lenghts. (Author)

  17. Training in methodology and application radionuclides in the biomedical surface area

    International Nuclear Information System (INIS)

    Signoretta, C.

    1998-01-01

    The CNEA with the Biological Argentine Association and the Nuclear Medicine Association makes to the consideration the Nuclear Regulatory Authority the program a Radiotherapy c curse that will allow to form medical professionals with the purpose of obtaining the permission for the application radiopharmaceuticals in therapy

  18. Status of RA3 conversion studies

    International Nuclear Information System (INIS)

    Testoni, J.

    1983-01-01

    Studies carried out at CNEA in Argentina for the conversion of the RA3 3.5 MW reactor to LEU fuel dealt with neutronic, thermal hydraulic, safety analysis, as well as fuel manufacture. Some of the results for the neutronic studies are reported

  19. Annual Report 1981

    International Nuclear Information System (INIS)

    1983-01-01

    The advances in the execution of the Argentine Nuclear Program, performed by CNEA during 1981, are reported. The information is grouped in six sections: Nuclear Power Plants, Supplies to Nuclear Power Plants, Radioisotopes and Radiations, Research and Development, Radiological Protection and Nuclear Safety, and Infrastructure and General Aspects. (M.E.L.) [es

  20. Annual Report 1982

    International Nuclear Information System (INIS)

    1983-01-01

    The advances in the execution of the Argentine Nuclear Program, performed by CNEA during 1982, are reported. The information is grouped in six sections: Nuclear Power Plants, Supplies to Nuclear Power Plants, Radioisotopes and Radiations, Research and Development, Radiological Protection and Nuclear Safety, and Infrastructure and General Aspects. (M.E.L.) [es

  1. State summary of radioactive material transport sector in Brazil

    International Nuclear Information System (INIS)

    Heilbron Filho, P.F.L.; Xavier, A.M.

    1991-07-01

    The main aim of this work is the scientific cooperation with the CNEA (Argentina) in the area of safe transport of radioactive materials, intending to find solutions to some rural problems and, also, to standardize the transport of radioactive materials between Brazil and Argentina. (E.O.)

  2. LEU fuel fabrication in Argentina

    International Nuclear Information System (INIS)

    Giorsetti, D.R.; Gomez, J.O.; Marajofsky, A.; Kohut, C.

    1985-01-01

    As an Institution, aiming to meet with its own needs, CNEA has been intensively developing reduced enriched fuel to use in its own research and test reactors. Development of the fabrication technology as well as the design, installation and operation of the manufacturing plant, have been carried out with its own funds. Irradiation and post-irradiation of test miniplates have been taking place within the framework of the RERTR program. During the last years, CNEA has developed three LEU fuel types. In the previous RERTR meetings, we presented the technological results obtained with these fuel types. This paper focuses on CNEA LEU fuel element manufacturing status and the trained personnel we can offer in design and manufacture fuel capability. CNEA has its own fuel manufacturing technology; the necessary facilities to start the fuel fabrication; qualified technicians and professionals for: fuel design and behaviour analysis; fuel manufacturing and QA; international recognition of its fuel development and manufacturing capability through its ORR miniplate irradiation; its own natural uranium and the future possibility to enrich up to 20% U 235 ; the probability to offer a competitive fuel manufacturing cost in the international market; the disposition to cooperate with all countries that wish to take part and aim to reach an self-sufficiency in their own fuel supply needs

  3. Research: the basis for the future

    International Nuclear Information System (INIS)

    Cambiaggio, Maria C.

    2001-01-01

    The significance of the scientific research for the technological development of a country is outlined and a short survey is given of the research activities in different fields carried out at the Argentine CNEA. The international Auger Project on very high-energy cosmic rays is described and the Argentine participation in it is also outlined

  4. Decommissioning and deactivation of nuclear facilities; Desmantelamiento y clausura de instalaciones nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Anasco, Roberto; Harriague, Santiago; Hey, Alfredo M [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Gerencia de Tecnologia y Medio Ambiente; Fabbri, Silvio [Comision Nacional de Energia Atomica, General San Martin (Argentina). Centro Atomico Constituyentes; Garonis, Omar H [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Gestion de Calidad

    2003-07-01

    The National Atomic Energy Commission (CNEA) is responsible for the decommissioning and deactivation of all relevant nuclear facilities in Argentina. A D and D Subprogram was created in 2000, within Technology Branch of the CNEA, in order to fulfill this responsibility. The D and D Subprogram has organized its activities in four fields: Planning; Technology development; Human resources development and training; International cooperation. The paper describes the work already done in those 4 areas, as well as the nuclear facilities existing in the country. Planning is being developed for the decommissioning of research reactors, beginning with RA-1, as well as for the Atucha I nuclear power station. An integral Management System has been developed, compatibilizing requirements from ISO 9001, ISO 14001, the national norm for Safety and Occupational Health (equivalent to BS 8800), and IAEA 50-SG Q series. Technology development is for the time being concentrated on mechanical decontamination and concrete demolition. A review has been made of technologies already developed both by CNEA and Nucleoelectrica Argentina S.A. (the nuclear power utility) in areas of chemical and electrochemical decontamination, cutting techniques and robotics. Human resources development has been based on training abroad in the areas of decontamination, cutting techniques, quality assurance and planning, as well as on specific courses, seminars and workshops. An IAEA regional training course on D and D has been given on April 2002 at CNEA's Constituyentes Atomic Center, with the assistance of 22 university graduates from 13 countries in the Latin American and Caribbean Region, and 11 from Argentina. CNEA has also given fellowships for PhD and Master thesis on the subject. International cooperation has been intense, and based on: - IAEA Technical Cooperation Project and experts missions; - Cooperation agreement with the US Department of Energy; - Cooperation agreement with Germany

  5. Decommissioning and deactivation of nuclear facilities

    International Nuclear Information System (INIS)

    Anasco, Roberto; Harriague, Santiago; Hey, Alfredo M.; Fabbri, Silvio; Garonis, Omar H.

    2003-01-01

    The National Atomic Energy Commission (CNEA) is responsible for the decommissioning and deactivation of all relevant nuclear facilities in Argentina. A D and D Subprogram was created in 2000, within Technology Branch of the CNEA, in order to fulfill this responsibility. The D and D Subprogram has organized its activities in four fields: Planning; Technology development; Human resources development and training; International cooperation. The paper describes the work already done in those 4 areas, as well as the nuclear facilities existing in the country. Planning is being developed for the decommissioning of research reactors, beginning with RA-1, as well as for the Atucha I nuclear power station. An integral Management System has been developed, compatibilizing requirements from ISO 9001, ISO 14001, the national norm for Safety and Occupational Health (equivalent to BS 8800), and IAEA 50-SG Q series. Technology development is for the time being concentrated on mechanical decontamination and concrete demolition. A review has been made of technologies already developed both by CNEA and Nucleoelectrica Argentina S.A. (the nuclear power utility) in areas of chemical and electrochemical decontamination, cutting techniques and robotics. Human resources development has been based on training abroad in the areas of decontamination, cutting techniques, quality assurance and planning, as well as on specific courses, seminars and workshops. An IAEA regional training course on D and D has been given on April 2002 at CNEA's Constituyentes Atomic Center, with the assistance of 22 university graduates from 13 countries in the Latin American and Caribbean Region, and 11 from Argentina. CNEA has also given fellowships for PhD and Master thesis on the subject. International cooperation has been intense, and based on: - IAEA Technical Cooperation Project and experts missions; - Cooperation agreement with the US Department of Energy; - Cooperation agreement with Germany

  6. AS RELAÇÕES BRASIL - PARAGUAI: do litígio da fronteira brasileiro-paraguaia (1962 à Ata das Cataratas (1966

    Directory of Open Access Journals (Sweden)

    Tomaz Espósito Neto

    2013-09-01

    The relationship between BRAZIL - PARAGUAY: Litigation of the Brazilian-Paraguayan border (1962 Ata das Cataratas (1966 In the early 60s, Brazil and Paraguay disputed the sovereignty of a small region near Sete Quedas falls, also known as Salto de Guaira. This territorial problem was solved onlywith the Itaipu Treaty (1973 and the construction of abinational hydroelectric on the site. However, the Ata das Cataratas (1966 treaty inspired thelegal framework of the Treaty of 1973 and the Itaipu. This article presents the evolution of the Sete Quedas border dispute between Brazil and Paraguay. Keywords: sete Quedas.relationships Brazil –Paraguay. Itaipu

  7. On the status of Dusky-legged Guan Penelope obscura Temminck, 1815 (Aves: Cracidae in Paraguay

    Directory of Open Access Journals (Sweden)

    Paul Smith

    2015-01-01

    Full Text Available Despite repeated references to the species in Paraguay, the status of the Dusky-legged Guan Penelope obscura in the country has been the subject of much debate. In an attempt to clarify the available data, a thorough review of literature records is provided and details of new and previously unpublished records that confirm that the nominate subspecies is present in Paraguay are given. With the species limits in the obscura complex poorly defined, we provide a brief discussion of the potential importance of Paraguayan populations for the conservation of the species.

  8. Productivity in small dairy farms

    International Nuclear Information System (INIS)

    2007-12-01

    Over the past 10 years the IAEA has assisted the Ministerio de Agricultura y Ganaderia de la Republica del Paraguay in the area of animal production, through technical cooperation projects and research programs with emphasis on milk production. This will got the laboratory equipment, provision of materials and chemical reagents, as well as the training of technicians Paraguayans in specialized centers abroad, which enabled techniques used in the RIA and Ultrasound, used to monitor the reproductive and officials artificial insemination of cattle, with the consequent improvement in milk production [es

  9. Preliminary pharmacological studies on Eugenia uniflora leaves: xanthine oxidase inhibitory activity.

    Science.gov (United States)

    Schmeda-Hirschmann, G; Theoduloz, C; Franco, L; Ferro, E; de Arias, A R

    1987-11-01

    Eugenia uniflora is widely used in Paraguayan folk medicine. A hydroalcoholic extract of the leaves showed some central nervous system activity in hippocratic screening when given intraperitoneally, but little to no acute or subacute toxicity in doses up to 4200 mg/kg orally in BALB c mice. The LD50 of the extract was 220 mg/kg i.p. in mice. A decoction or infusion of the leaves is recommended for treating gout by native herbalists. The known flavonoids quercitrin, quercetin, myricitrin and myricetin were found to be responsible for the xanthine oxidase inhibitory action of the plant extract.

  10. Paraguay at its Centenary: the Creation of a Mestizo Nation

    Directory of Open Access Journals (Sweden)

    Ignacio Telesca

    2010-07-01

    Full Text Available This text studies the articulation of identity carried out by Paraguayan intellectuals after the war against the Triple Alliance (1864-1870 and in the eve of celebrating the centennial of their independence (1811. The author shows how a previous identity, based on a concept of mestizo race, but white in its own way, superior to the rest of the continent and allowing the soldiers’ heroism in war, was transformed into a mainly political use of mixed races as the foundations of a strong nation.

  11. 2011 Progress Report on HEU Minimization Activities in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Bonini, A.; Cristini, P.; Lio, L. De; Dell' Occhio, L.; Gil, D.; Gonzalez, A.G.; Gonzalez, R.; Varela, C. Komar; Lopez, M.; Novara, O.; Taboada, H. [Comision Nacional de Energia Atomica, Av. Del Libertador 8250 (1429) Buenos Aires (Argentina)

    2011-07-01

    After the core conversion of the RA-6 reactor finished in March 2008, an extension of the original CNEA-NNSA DoE contract was signed to enhance the final national HEU inventories minimization. Before this process, CNEA reserved a small inventory of HEU for R and D uses in fission chambers, neutronic probes and standards. This minimization comprises that all fresh and irradiated HEU remnant inventories coming from fuels and Mo99 irradiation targets fabrication and irradiated HEU-oxides retained in production filters and solutions will be recovered, down-blended into LEU and purified or dispose as waste whenever its recovery would not be advisable due to cost-benefit consideration. CNEA has a R and D program to develop the fabrication technology of both dispersed U-Mo (Al-Si matrix and Al cladding) and monolithic (Zry-4 cladding) miniplates to support the qualification activities of the RERTR program. Some monolithic 58% enrichment and LEU 8%Mo and U10%Mo miniplates and plates were and are being delivered to INL-DoE to be irradiated in the ATR reactor core. CNEA, a worldwide leader on LEU technology for fission radioisotope production is providing Brazil with 1/3 of the national requirements on Mo99 by weekly deliveries. Australia has started the fission radioisotope production through several batches by week, based on CNEA's LEU technology provided by INVAP SE. CNEA is also committed to improve the diffusion of LEU target and radiochemical technology for radioisotope production and target and process optimization. Future plans include: 1. Plans to recover and purify the LEU based inventories in Mo99 production filters, once the HEU to LEU campaign is over. 2. Fabrication and delivering to INL to be irradiated in the ATR core of U-8%Mo and U-10%Mo monolithic miniplates and development and fabrication of LEU very high density monolithic and dispersed U-Mo fuel plates with Zr cladding for the FUTURE-MONO experiment in the frame of the RERTR program. 3

  12. Actions concerning nuclear power plant life evaluation

    International Nuclear Information System (INIS)

    Chocron, M.; Fabbri, S.; Mizrahi, R.; Savino, E.J.; Versaci, R.A.

    1998-01-01

    One of the main activities to be undertaken by CNEA will be to provide technological assistance to NASA in problems concerning NPP operation. Works on life extensions of NPP are included in these activities. To fulfill these requirements the Atomic Energy National Commission (CNEA) has constituted a technical committee for Nuclear Power Plants Support (CAPCEN). CAPCEN should be the knowledge reservoir of those issues concerning the performance, safety and life extension of Nuclear Power Plants. One of CAPCEN's most important activities is to promote research work connected with such issues. The main technical areas are: Pressure Vessel and Piping, Heat Exchanges and Fuel Channels and Reactor Inner Components. Efforts are focused on the identification of the main components susceptible of ageing, the study of their ageing mechanisms, the follow-up of their behaviour during operation, and the measures taken to extend their life. (author)

  13. History of the libraries of the National Atomic Energy Commission. Part 1

    International Nuclear Information System (INIS)

    Alcon, Susana J.; Puglia, Gabriela; Chavez, Alejandra T.

    2004-01-01

    The paper is a historical overview of the libraries of the National Atomic Energy Commission (CNEA) of Argentina and covers the period between 1952-1988. The libraries that have been created and organized as a support for the CNEA staff to meet the information requirements on nuclear subjects, extended their services to the whole scientific and technological community in Argentina and in the Latin America Region. They have an important volume of documents and have been able to fulfill the needs of a demanding group of users because of the high level of its professional staff. The paper outlines the development of the collections, the technical processing methods and the services provided as well as information on the librarians that have been the heads of the libraries. (author)

  14. History of radiobiology in Argentina

    International Nuclear Information System (INIS)

    Mayo, Jose

    2004-01-01

    Radiobiology is a multidisciplinary science dealing with ionising radiation effects on biological material. The history of Radiobiology begins in Germany and France around 1886. Radiobiology was introduced in Argentina in 1926 at the Institute of Oncology Angel H. Roffo as a biomedical research branch. Later on in 1957 was incorporated at the National Atomic Energy Commission (CNEA) of Argentina as a result of the newly started nuclear activities in Argentina. Prior that time no Radiobiology research existed in Argentina. To fill this need a Project to create new laboratories was elaborated by the CNEA. New laboratories in Radiobiodosimetry, Cellular Radiobiology, Radiopathology, Radiomicrobiology, Genetics and Somatic Effects were created. Human resources on different areas of Radiobiology were formed with the assistance of IAEA. With professional and technical personnel specialized in Radiobiology at the beginning of the 1970 decade, the transference of fundamental and applied research to others laboratories started. (author)

  15. Fabrication criteria applicable to Carem pods production

    International Nuclear Information System (INIS)

    Bianchi, D R; Azzinari, D; Gongora, P; Sabio Calvete, M; Ilarri, M; Perazzo, M; Duarte, J; Duarte, A; Rojas, J; Fleitas, G; Szieber, W C; Vizcaino, P

    2012-01-01

    In relation CAREM 25 project, PPFAE, CNEA, has been fabricated pods for fuel rods for that reactor. They were used the same fuel rods that to be irradiate and evaluate their behavior with that the same Uranium pellets. The scope of the agreement signed between the authorities of the CNEA and Institutt for Energiteknikk (IFE) in Norway, it contemplated irradiated fuel rods type CAREM fabricated from these fuel pods in the OECD Halden Reactor Project (HRP, venture led by IFE and integrate more than 16 countries). The work contemplates the production of two experimental item fuel pods. From the second item fuel pods will be used in the fuel rods. In this paper we analyze the sequences used; the results obtained and the general conditions for the development of the final process to be applied in the production phase for a reactor CAREM 25 (author)

  16. Adequacy features of Nucleoelectrica Argentina Safety Management

    Energy Technology Data Exchange (ETDEWEB)

    Rapoport, H [Nucleoelectrica Argentina S.A., Buenso Aires (Argentina)

    1997-12-01

    The Argentine Nuclear Power Plants (NPP) ATUCHA I (357 Mw, SIEMENS) and EMBALSE (648 Mw, CANDU), both of PHWR type, were owned and operated until August 94 by the Comision Nacional de Energia Atomica (CNEA). Until that date, CNEA, the national agency for nuclear R and D, concentrated three activities or roles: Research, Nuclear Regulations and NPP Operation. Since August 1994 NPP`s are owned and operated by a state electrical company (Nucleoelectrica Argentina S.A.) the nuclear utility supplying 15% of the national electrical generation demand. NASA is going to be privatized according to a recent national law regulating nuclear activities. The transition from a research agency to a commercial company requires the introduction of changes in the management of activities. Mention of these changes is limited to those relating to Safety.

  17. Safety aspects of the FMPP (Fuel Manufacturing Pilot Plant) setup constructed by INVAP in the Arabic Republic of Egypt

    International Nuclear Information System (INIS)

    Cinat, Enrique; Boero, Norma L.

    1999-01-01

    The FMPP is a fuel plates manufacturing plant for test reactors. This facility was designed, constructed in El Cairo and turned-key handled by INVAP SE to the Arabian Republic of Egypt. In this project, CNEA participated in the transference of technology, elaboration of documents, training of Egyptian personnel and technical services during the setup of the facility in El Cairo. These tasks were undertaken by UPMP (Uranium Powder Manufacturing Plant) and ECRI (Research Reactors Fuel Elements Plant) personnel. Both plants in CNEA served as a FMPP design basis. During the setup of the facility a fuel element with natural uranium was firstly manufactured and then another one using uranium with 20% enrichment. In this paper the responses of the system regarding safety, after finishing the first two stages of manufacturing, are analyzed and evaluated. (author)

  18. Safety aspects of the FMPP (Fuel Manufacturing Pilot Plant) setup constructed by INVAP in the Arabic Republic of Egypt; Aspectos de seguridad en la puesta en marcha de la FMPP (Fuel Manufacturing Pilot Plant) construida por INVAP en la Republica Arabe de Egipto

    Energy Technology Data Exchange (ETDEWEB)

    Cinat, Enrique; Boero, Norma L [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Combustibles Nucleares

    1999-07-01

    The FMPP is a fuel plates manufacturing plant for test reactors. This facility was designed, constructed in El Cairo and turned-key handled by INVAP SE to the Arabian Republic of Egypt. In this project, CNEA participated in the transference of technology, elaboration of documents, training of Egyptian personnel and technical services during the setup of the facility in El Cairo. These tasks were undertaken by UPMP (Uranium Powder Manufacturing Plant) and ECRI (Research Reactors Fuel Elements Plant) personnel. Both plants in CNEA served as a FMPP design basis. During the setup of the facility a fuel element with natural uranium was firstly manufactured and then another one using uranium with 20% enrichment. In this paper the responses of the system regarding safety, after finishing the first two stages of manufacturing, are analyzed and evaluated. (author)

  19. A Small-Animal Irradiation Facility for Neutron Capture Therapy Research at the RA-3 Research Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Emiliano Pozzi; David W. Nigg; Marcelo Miller; Silvia I. Thorp; Amanda E. Schwint; Elisa M. Heber; Veronica A. Trivillin; Leandro Zarza; Guillermo Estryk

    2007-11-01

    The National Atomic Energy Commission of Argentina (CNEA) has constructed a thermal neutron source for use in Boron Neutron Capture Therapy (BNCT) applications at the RA-3 research reactor facility located in Buenos Aires. The Idaho National Laboratory (INL) and CNEA have jointly conducted some initial neutronic characterization measurements for one particular configuration of this source. The RA-3 reactor (Figure 1) is an open pool type reactor, with 20% enriched uranium plate-type fuel and light water coolant. A graphite thermal column is situated on one side of the reactor as shown. A tunnel penetrating the graphite structure enables the insertion of samples while the reactor is in normal operation. Samples up to 14 cm height and 15 cm width are accommodated.

  20. Uranium mining in Sierra Pintada: knowledge, epistemic communities and development

    International Nuclear Information System (INIS)

    Martinez Demarco, S. R.

    2011-01-01

    This paper analyses the conflict triggered by the National Atomic Energy Commission of Argentina (CNEA) proposing to re-open the Mining Complex of Sierra Pintada, in San Rafael, Province of Mendoza. Since 2004 when the Commission submitted the first report to the Ministry of Public Works and Environment of Mendoza to obtain the necessary permission to restart the works in the mine, several protests have taken place and many legal measures were taken in order to stop any resuming attempts. This study argues that, although CNEA has been an epistemic community capable of applying their policy proposals in the nuclear field, their technical knowledge is currently not sufficient to design a policy, and moreover, to hold that they are working for local and sustainable development. Only 'puzzling' 'with actors' paradigms and knowledge is possible to fit together their demands and achieve a public policy, or solution, for this problem. (author) [es

  1. CAREM-25: considerations about primary coolant chemistry

    International Nuclear Information System (INIS)

    Chocron, Mauricio; Iglesias, Alberto M.; Raffo Calderon, Maria C.; Villegas, Marina

    2000-01-01

    World operating experience, in conjunction with basic studies has been modifying chemistry specifications for the primary coolant of water cooled nuclear reactors along with the reactor type and structural materials involved in the design. For the reactor CAREM-25, the following sources of information have been used: 1) Experience gained by the Chemistry Department of the National Atomic Energy Commission (CNEA, Argentina); 2) Participation of the Chemistry Department (CNEA) in international cooperation projects; 3) Guidelines given by EPRI, Siemens-KWU, AECL, etc. Given the main objectives: materials integrity, low radiation levels and personnel safety, which are in turn a balance between the lowest corrosion and activity transport achievable and considering that the CAREM-25 is a pressurized vessel integrated reactor, a group of guidelines for the chemistry and additives for the primary coolant have been given in the present work. (author)

  2. On line local measurement of thermal neutron flux on BNCT patient using SPND

    International Nuclear Information System (INIS)

    Miller, M.E.; Sztejnberg Goncalves-Carralves, M.L.; Gonzalez, S.J.

    2006-01-01

    The first on-line neutron flux measurement on a patient using a self-powered neutron detector (SPND) was assessed during the fourth clinical trial of the Boron Neutron Capture Therapy (BNCT) Project carried out at the National Atomic Energy Commission of Argentina (CNEA) and the medical center Angel H. Roffo. The SPND was specially developed and assembled for BNCT by CNEA. Its small size, 1 cm sensible length and 1.9 mm diameter, allowed performing a localized measurement. Since the treated tumors were cutaneous melanomas of nodular type, the SPND was located on the patient's skin. The patient was exposed to three different and consecutive fields and in each of them the SPND was used to measure local thermal neutron fluxes at selected dosimetric reference points. The values of the measured fluxes agreed with the ones estimated by calculation. This trial also demonstrated the usefulness of the SPND for assessing flux on-line. (author)

  3. Comparison between a finite difference model (PUMA) and a finite element model (DELFIN) for simulation of the reactor of the atomic power plant of Atucha I; Comparacion entre un modelo de diferencias finitas (PUMA) y uno de elementos finitos (DELFIN) para la simulacion del reactor de la CNA-I (central nuclear Atucha-I)

    Energy Technology Data Exchange (ETDEWEB)

    Grant, C R [Comision Nacional de Energia Atomica, San Martin (Argentina). Unidad de Actividad Reactores y Centrales Nucleares

    1997-12-31

    The reactor code PUMA, developed in CNEA, simulates nuclear reactors discretizing space in finite difference elements. Core representation is performed by means a cylindrical mesh, but the reactor channels are arranged in an hexagonal lattice. That is why a mapping using volume intersections must be used. This spatial treatment is the reason of an overestimation of the control rod reactivity values, which must be adjusted modifying the incremental cross sections. Also, a not very good treatment of the continuity conditions between core and reflector leads to an overestimation of channel power of the peripherical fuel elements between 5 to 8 per cent. Another code, DELFIN, developed also in CNEA, treats the spatial discretization using heterogeneous finite elements, allowing a correct treatment of the continuity of fluxes and current among elements and a more realistic representation of the hexagonal lattice of the reactor. A comparison between results obtained using both methods in done in this paper. (author). 4 refs., 3 figs.

  4. Malargue site, to-day and its future

    International Nuclear Information System (INIS)

    Meza, Juan C.; Giordano, Norberto L.

    2005-01-01

    In Argentina the National Atomic Energy Commission (CNEA) has the responsibility of restoring uranium mining facilities once the operations have finished. To carry out these clean up actions CNEA created the Project for Uranium Mining Environmental Restoration (PRAMU). Malargue Site, Mendoza province, has the first restoration priority among 8 sites in the country. The approved project for restoration consists of on site relocation of tailings to an engineering repository. To isolate the tailings from the environment, a multilayer system has been designed. Several works have been made, the secondary previous works were completed and nowadays works on the button portion of the multilayer barrier are being carries out. At the present, it is quite probable that the World Bank grants a credit to finish the works on Malargue Site and in the other sites in Argentina as well. (author)

  5. Comparison between a finite difference model (PUMA) and a finite element model (DELFIN) for simulation of the reactor of the atomic power plant of Atucha I

    International Nuclear Information System (INIS)

    Grant, C.R.

    1996-01-01

    The reactor code PUMA, developed in CNEA, simulates nuclear reactors discretizing space in finite difference elements. Core representation is performed by means a cylindrical mesh, but the reactor channels are arranged in an hexagonal lattice. That is why a mapping using volume intersections must be used. This spatial treatment is the reason of an overestimation of the control rod reactivity values, which must be adjusted modifying the incremental cross sections. Also, a not very good treatment of the continuity conditions between core and reflector leads to an overestimation of channel power of the peripherical fuel elements between 5 to 8 per cent. Another code, DELFIN, developed also in CNEA, treats the spatial discretization using heterogeneous finite elements, allowing a correct treatment of the continuity of fluxes and current among elements and a more realistic representation of the hexagonal lattice of the reactor. A comparison between results obtained using both methods in done in this paper. (author). 4 refs., 3 figs

  6. Molding and casting process of a depleted uranium shield for a multipurpose type B (U) transport package of radioactive substances

    International Nuclear Information System (INIS)

    Raffaeli, Hector A.; Acosta, Mario; Ilarri, Sergio; Alonso, Paula R.; Gargano, Pablo H.; Rubiolo, Gerardo H.

    2009-01-01

    Anticipating future demand for transport of radioisotopes, a high performance transport package (BU-MAN) with a gamma barrier built in depleted uranium (DU) has been designed by the Radioisotope and Radiation Program (P4) of CNEA in 2003. The shield is a hollow cylinder of approximately 173 mm outside diameter, 223 mm in height, a cylindrical hollow interior 63 mm diameter and 166 mm in height, and a cylindrical plug 58 mm diameter and 57 mm height. Its total weight is 84 Kg. In the period 2004-2006 the Special Alloys Group (DM-GIDAT-GAEN-CNEA) has conducted several developments in order to obtain the mentioned shield, including a manufacturing test casting SAE 1010 in a sand mold. The confirmation of its properties, mechanical and gamma shield are being evaluated by licensing tests of the whole package. In this paper we show all metallurgical processes involved to get the shield in metallic DU. (author)

  7. Comparison of theoretical and experimental determinations of calibration factors for cylindrical and parallel plates ionization chambers

    International Nuclear Information System (INIS)

    Vallejos, Matias; Montano, Gustavo A.; Stefanic, Amalia; Saravi, Margarita

    2009-01-01

    The Ionizing Radiation Dosimetry Section of CNEA is the National Laboratory of Dosimeter Reference, having been designated by the National Institute of Industrial Technology (INTI, deposit taker by Law 19,511/72 of the national standards for metrology) for the safekeeping and operation of the national standards for dosimetry (Agreement INTI - CNEA, February 2004). From their creation, the CRRD provides, among other services, the calibration of dosemeters used in radiotherapy, in terms of Kerma in air, and since year 2002 provides calibration in terms of absorbed dose in water. In this work, those elements appear whereupon it counts the laboratory and that they tend to consolidate the securing of the quality of the results obtained in the calibrations of dosemeters. (author)

  8. Adequacy features of Nucleoelectrica Argentina Safety Management

    International Nuclear Information System (INIS)

    Rapoport, H.

    1997-01-01

    The Argentine Nuclear Power Plants (NPP) ATUCHA I (357 Mw, SIEMENS) and EMBALSE (648 Mw, CANDU), both of PHWR type, were owned and operated until August 94 by the Comision Nacional de Energia Atomica (CNEA). Until that date, CNEA, the national agency for nuclear R and D, concentrated three activities or roles: Research, Nuclear Regulations and NPP Operation. Since August 1994 NPP's are owned and operated by a state electrical company (Nucleoelectrica Argentina S.A.) the nuclear utility supplying 15% of the national electrical generation demand. NASA is going to be privatized according to a recent national law regulating nuclear activities. The transition from a research agency to a commercial company requires the introduction of changes in the management of activities. Mention of these changes is limited to those relating to Safety

  9. Results of the argentinian intercomparison on internal dosimetry 2014. Measurement of thyroid burden

    International Nuclear Information System (INIS)

    Rojo, A.M.; Puerta, N.; Gossio, S.; Gómez Parada, I.

    2015-01-01

    Internal dosimetry intercomparisons are essential for the verification of the capability to perform direct measurements of “1”3”1I thyroid burden and the expertise in the interpretation of these data for dose assessment. To that aim, in 2014 the National Intercomparison Exercise was organized and coordinated by the Internal Dosimetry Laboratory of the Autoridad Regulatoria Nuclear (ARN) of Argentina. The exercise counted with the participation of six internal dosimetry services: nuclear power plants (NA-SA CNA and NA-SA CNE), CNEA Atomic Centres: Bariloche (CAB) and Ezeiza (CAE), Roffo Institute (UBA – CNEA) and ARN. This report shows a complete analysis of the participant’s results in this exercise. (authors) [es

  10. Proceedings of the eighth scientific meeting; second latin american meeting; first engineering and argentine nuclear industry exposition at Buenos Aires, 5-10 november 1979

    International Nuclear Information System (INIS)

    1981-11-01

    Compilation of 59 papers of different authors, most of whom are personnel from the Argentine National Atomic Energy Commission (CNEA), the others belonging to the firms involved in the development of the Argentine Nuclear Programme. The papers are arranged in 7 sections comprising the following groups of subjects; experimental and power reactors; fuel elements' fabrication study; prospection, extraction, production and study of nuclear materials; radiological and nuclear safety; instrumentation and control; quality assurance, and technological applications. (R.J.S.) [es

  11. Radiobiology Department. Report of Activities 1977-1980

    International Nuclear Information System (INIS)

    1982-02-01

    The different research activities carried out by the Radiobiology Department of the CNEA over the 4-year period 1977-1980 are summarized. These activities were devoted to the study of the effects of radiation on different biological systems, to the search for adequate experimental models, and to the development of techniques permiting a correct evaluation of the information obtained. Topics covered are genetics, microbiology, somatic effects of radiation, pathology and the operation of the animal's house. (M.E.L.) [es

  12. The extension of the international trade

    International Nuclear Information System (INIS)

    Buch, Tomas

    1998-01-01

    INVAP, a company pertaining to the Rio Negro province and controlled by the National Atomic Energy Commission (CNEA), has been instrumental for the international expansion of the Argentine nuclear trade, including the provision of Argentine research reactors to Algeria and Egypt. The history of the negotiations carried out with about twenty countries is shortly summarized and the scope of the supply of the major contracts is described

  13. Compact device for the extraction of sup(99m)TcO4Na

    International Nuclear Information System (INIS)

    Pliego, O.H.; Mitta, A.E.A.

    1982-01-01

    A non automatic device for the extraction of sup(99m)TcO 4 Na by liquid-liquid extraction method is described. It has been developed at the Laboratory of Labelled Molecules of the CNEA and was installed at the Nuclear Medicine Centre of the Hospital de Clinicas Jose de San Martin. The solutions of sup(99m)TcO 4 Na are used for the labelling of radiopharmaceuticals and also for making radiodiagnosis. (author) [es

  14. CARA project

    International Nuclear Information System (INIS)

    Bergallo, Juan E.; Brasnarof, Daniel O.

    2000-01-01

    The CARA (Advanced Fuels for Argentine Reactors) Project successfully completed its first stage, phase one, last year. The performance of this fuel has been partially examined, using CNEA and CONUAR facilities and personnel. With the results obtained in this stage, determined by the corresponding tests and verification of the fuel behavior, the performance of the second stage started immediately afterwards. Works performed and results obtained during the development of the second stage are generally described in this paper. (author)

  15. Annual Report 1982

    International Nuclear Information System (INIS)

    1983-06-01

    This report describes the activities performed during 1982 by the Chemistry Department of CNEA's Research and Development Branch, distributed into the following divisions: Analytic Chemistry (mass spectrometry, general analysis, X-ray fluorescence spectrometry, optical spectrometry, electrochemistry, analytical chemistry of active materials, statistical methods); Physico-Chemistry (experimental developments, physico-chemistry of interphases, physico-chemistry of surfaces) and Inorganic Chemistry. (M.E.L.) [es

  16. Technological aspects of UO2 sintering at low temperature

    International Nuclear Information System (INIS)

    Thern, Gerardo G.; Dominguez, Carlos A.; Benitez, Ana M.; Marajofsky, Adolfo

    1999-01-01

    Within the Fuel Cycle Program of CNEA, the knowledge that plant personnel has on sintering at low temperature was evaluated, because this process could decrease costs for UO 2 and (U,Gd)O 2 pellets production, simplify the furnace maintenance and facilitate the automation of the production process, specially convenient for uranium recovery. By applying this technology, some companies have achieved production at pilot-scale and irradiated a significant number of pellets. (author)

  17. 2010 national progress report on R and D on LEU fuel and target technology in Argentina

    International Nuclear Information System (INIS)

    Balart, S.; Blaumann, H.; Cristini, P.; Gonzalez, A.G.; Gonzalez, R.; Hermida, J.D.; Lopez, M.; Mirandou, M.; Taboada, H.

    2010-01-01

    Since last RRFM meeting, CNEA has deployed several related tasks. The RA-6 MTR type reactor, converted its core from HEU to a new LEU silicide one is scaling up the power, according to a protocol requested by the national regulatory body, ARN. CNEA is deploying an intense R and D activity to fabricate both dispersed U-Mo (Al-Si matrix and Al cladding) and monolithic (Zry-4 cladding) miniplates to develop possible solutions to VHD dispersed and monolithic fuels technical problems. Some monolithic 58% enrichment U8%Mo and U10%Mo are being delivered to INL-DoE to be irradiated in ATR reactor core. A conscientious study on compound interphase formation in both cases is being carried out. CNEA, a worldwide leader on LEU technology for fission radioisotope production is providing Brazil with these radiopharmaceutical products and Egypt and Australia with the technology through INVAP SE. CNEA is also committed to improve the diffusion of LEU target and radiochemical technology for radioisotope production and target and process optimization. Future plans include: 1) Fabrication of a LEU dispersed U-Mo fuel prototype following the recommendations of the IAEA's Good Practices document, to be irradiated in a high flux reactor in the frame of the ARG/4/092 IAEA's Technical Cooperation project. 2) Development of LEU very high density monolithic and dispersed U-Mo fuel plates with Zry-4 or Al cladding as a part of the RERTR program. 3) Optimization of LEU target and radiochemical techniques for radioisotope production. (author)

  18. Implementation of quality control systems in laboratories in Paraguay by the participants of ARCAL LXXVI project

    International Nuclear Information System (INIS)

    Villanueva, Z.

    2004-12-01

    In the Project ARCAL LXXVII, was realized the National Course of Control of Quality of Analytic Laboratories, from 12 to 16 of April in the CNEA, Paraguay, as a result of the one mentioned course was elaborated this project whose purpose is to elaborate the necessary documentation to fulfill the requirements of administration in the Analytic Laboratories to be adapted to the system of quality according to the ISO 17025 [es

  19. Experience in construction and operation of HWR plants in Argentina

    International Nuclear Information System (INIS)

    Madero, C.C.; Cosentino, J.O.

    1982-01-01

    ''ATUCHA I'', the first nuclear power plant in Argentina, is in commerical operation since 1974 with a high capacity factor. The reactor is based on the MZFR prototype designed by SIEMENS with natural uranium and heavy water and PWR technic. The plant was built by SIEMENS on a turnkey contract and was rated 340 MWe. The offer presented in that opportunity by KWU was based on two reactors (ATUCHA I type) inside one single containment, due to the limitation in power of the reactor. Subsequent changes in the nature of the contract resulted in an active participation of CNEA engineering groups in the erection and commissioning of the reactor. In 1978 the national government approved a nuclear power plan to install four 600 MWe HWR plants until 1995. To start implementing this program, CNEA called for tenders for the supply of components and services for the ATUCHA II plant, in connection with the establishment of a local engineering company and the supply and construction of a heavy water production plant. In 1980 a contract was signed with KWU and the local company ENACE was formed to act as architect engineer and site coordinator. The plant will be located in the ATUCHA I site and the reactor will be similar but double in power to that one. Following the schedule of the nuclear plan, CNEA has just started preliminary studies for the next nuclear plant. ENACE will be responsible for the preparation of an offer for an ATUCHA reactor type. Local engineering and manufacturing firms, upon request and coordination from CNEA, and evaluating the local capacity to participate in the design and construction of a CANDU type nuclear plant. Final decision on this fourth nuclear plant in Argentina will be taken middle 1983. (J.P.N.)

  20. Reagent' sets for the concentration of sup(99m)Tc and sup(113m)In

    International Nuclear Information System (INIS)

    Bianco de Salas, G.N.; Arciprete, J.; Mitta, A.E.A.

    1976-10-01

    A simple technique for the concentration of the eluates from 99 Mo/sup(99m)Tc and 113 Sn/sup(113m)In generators is described. The reagents' sets provided by the C.N.E.A. for the labelling of different radiopharmaceuticals can be used by only reducing their volumes proportionally. Both concentration techniques for Tc-99m and In-113m will be supplied to users as reagents' sets. (author) [es

  1. Validation of the COBRA code for dry out power calculation in CANDU type advanced fuels

    International Nuclear Information System (INIS)

    Daverio, Hernando J.

    2003-01-01

    Stern Laboratories perform a full scale CHF testing of the CANFLEX bundle under AECL request. This experiment is modeled with the COBRA IV HW code to verify it's capacity for the dry out power calculation . Good results were obtained: errors below 10 % with respect to all data measured and 1 % for standard operating conditions in CANDU reactors range . This calculations were repeated for the CNEA advanced fuel CARA obtaining the same performance as the CANFLEX fuel. (author)

  2. Presentation of the 'Atlas hot workability in steels'

    International Nuclear Information System (INIS)

    Merlone, G.F.; Nunez Pettinari, S.I.; Ruzzante, J.E.

    1993-01-01

    The Atlas summarizes the experience of almost two decades of applied research in the siderurgical industry (IAS-CNEA joint agreements), by means of hot torsion test to evaluate the hot workability in steels through ductility properties and the formation strength. It has a technical prologue, from the abundant specific bibliography, and diagrams of about 40 steels of domestic manufacturing. The information is of industrial application as well as metallurgical research. (Author)

  3. Annual Report 1981

    International Nuclear Information System (INIS)

    1982-02-01

    This report describes the research and development activities performed by CNEA's Chemistry Department during 1981, distributed into the following fields: Analytic Chemistry (mass spectrometry, general analysis, X-ray spectrometry, optical spectrometry, electrochemistry, active materials), Physical Chemistry (interphases, surfaces, experimental developments) and Inorganic Chemistry (preparative processes, special treatments). A list of publications made during this period on the above mentioned subjects is attached. (M.E.L.) [es

  4. Dry storage of spent fuel elements: interim facility

    International Nuclear Information System (INIS)

    Quihillalt, O.J.

    1993-01-01

    Apart from the existing facilities to storage nuclear fuel elements at Argentina's nuclear power stations, a new interim storage facility has been planned and projected by the Argentinean Atomic Energy Commission (CNEA) that will be constructed by private group. This article presents the developments and describes the activities undertaken until the national policy approach to the final decision for the most suitable alternative to be adopted. (B.C.A.). 09 refs, 01 fig, 09 tabs

  5. Uranium mining environmental restoration project (PRAMU)

    International Nuclear Information System (INIS)

    Asenjo, A.

    2002-01-01

    The National Atomic Energy Commission (CNEA) started its activities 50 years ago and obtained significant results. At the present time, the CNEA is defined as an Institution of research and development in the nuclear field. It is also responsible for the management of radioactive wastes and the dismantling of nuclear and radioactive facilities. Mining and milling activities have been carried out during the past 40 years and at present the CNEA is undertaking the Uranium Mining Environmental Restoration Project (PRAMU). The aim of this project is to restore the environment as much as is possible in all places where uranium mining and milling activities were developed when taking into consideration both economic and technical reality. First, the characteristics of the problems in each site are determined through appropriate studies which identify the existing or potential impacts, the possible pathways of contamination, etc. The sites being studied are: MALARGUE (Mendoza Province), CORDOBA (Cordoba Province), LOS GIGANTES (Cordoba Province), HUEMUL (Mendoza Province), PICHINAN (Chubut Province), TONCO (Salta Province), LA ESTELA (San Luis Province), LOS COLORADOS (La Rioja Province). PRAMU seeks to improve the current conditions of the tailings deposits and mines and to ensure the long term protection of people and the environment. The CNEA is required to comply with all legislation that is in force and is under the control of various national, provincial and local State institutions. The main objectives of the project for the various sites are: (a) Malargue site: to implement the actions necessary for environmental restoration and management of the tailings derived from the uranium ores processed in the industrial plant; (b) Cordoba and Los Gigantes sites: to design, engineer and execute the activities required for closure of the sites; (c) Other sites (Huemul, Pichinan, Tonco, La Estela, Los Colorados): to develop an environmental evaluation and, on the basis of

  6. Neck Injury in Advanced Military Aircraft Environments

    Science.gov (United States)

    1990-02-01

    hours (hi total fiying tine. Equipment: Helmet and musk Used was a hGU-26P/MBU-5P (1.9kg) fitted with Velcro pads only (not custom fit). Mission...innery) pablla:.ad by Lea t. Febloar. PhIla,-reiphio, pp. 2C2 to 149; 1951, 6.P elon l., Aoffrel t9 R. e’ al .: Acvldenmu icl Cnea-Ilaes and

  7. Nuclear Activities in Argentina. A short Review. Part 2

    International Nuclear Information System (INIS)

    Coll, Jorge A.; Radicella, Renato

    2002-01-01

    The second part of this historical review covers the 'industrial' period of nuclear energy in Argentina. The National Atomic Energy Commission (CNEA), after a feasibility study carried out by argentine experts, in 1968 signed a contract to build a nuclear power plant. This PHWR plant, Atucha 1, of 310 MWe was inaugurated in 1973 and it is still operating. The same year the CNEA signed a new contract to build a CANDU type plant of 600 MWe, Embalse, that was finally inaugurated in 1983. The construction of a third plant, Atucha 2 of 745 MWe also a PHWR, was started in 1980 but was arrested in 1994, when more than 80% was completed, and it is still waiting a political decision to reach completion. Within the development of the nuclear power program, a fuel element production plant for the Argentine power reactors was built by the CNEA and a heavy water production plant of 250 tons/year was inaugurated in 1993 in the southern province of Neuquen. A pilot spent fuel reprocessing plant was designed but its construction was not completed. At the same time, a pilot gaseous diffusion plant was constructed in order to produce enriched uranium for research reactors. The activities in the field of radioisotope and radiation applications were also intensive, mainly in nuclear medicine and food preservation. A facility to fabricate sealed sources was built to process the Co 60 produced by the Embalse power plant. Argentina was active in the export of nuclear facilities: CNEA built a complete nuclear research center in Peru, and the Argentine company INVAP built research reactors in Algeria and Egypt. The same company is now building a research reactor in Australia. (author)

  8. Monitoring for safety and reliability

    International Nuclear Information System (INIS)

    Garcia Peyrano, O.

    1994-01-01

    This paper is related to the development of a Condition Monitoring Center for the CNEA production plants. A pilot surveillance program is now in operation using the main pump of the RA-6 REACTOR, and small tests set up. Radio links, and digital data transmission systems is in operation in both cases. Standard software is used for data acquisition, function calculation and post processing. (author). 7 figs

  9. Argentina: Overview of activities on Neutron Imaging (NI) and Cultural Heritage (CH) studies

    International Nuclear Information System (INIS)

    Sánchez, Fernando

    2012-01-01

    In Argentina there exists a community of researchers of national institutions involved in CH studies and also periodic congresses about the topic since 2007. A new group on neutron imaging is beginning at Bariloche Atomic Center (CNEA). The plan of this group is: - Characterize the facility: flux, doses, collimation, etc;. - Establish contact with CH researchers for offering neutron imaging; - Demonstrate capabilities of the technique with 2D imaging; - In the future, a 3D tomography improvement will be developed

  10. Development of the double encapsulated sources of Ir 192 for industrial applications

    International Nuclear Information System (INIS)

    Munoz, C; Sabio Calvete, M; Bianchi, D; Banchik, D; Gonzalez, A; Mender, A

    2004-01-01

    The steps are described that were followed for carrying out the scientific and technological development of the double encapsulated sources for the Iridium-192 to be used in industrial gammagraphy. This development arises from an agreement between INVAP and the CNEA as part of the EGIPTO Project. Each step is outlined in the development together with the different experiences undertaken to obtain the source, whose construction meets the local and international standards for safety and radiological protection (ARN, IRAM, ISO standards) (Cw)

  11. An Early Psychology of Science in Paraguay

    Directory of Open Access Journals (Sweden)

    José E. García

    2016-10-01

    Full Text Available The psychology of science is a field of research emerged in the late 80’s and its basic interest is the study of the conditions determining the rise and development of scientists and researchers. However, in spite of its apparent novelty, it is feasible to find background widely disseminated in the work of previous authors. One of them is R. Ross, who wrote an article in the Paraguayan journal Letras in 1915. Ross argued that geniuses’ production is one of the most valuable potentials to which a nation can aspire and has a relevance degree higher than any kind of wealth. His argument agrees with considerations related to the subjective processes leading creative inspiration, the generation of new ideas and the relations between genius and insanity, a view that fits the ideas of the Italian physician Cesare Lombroso. The article concludes that Ross’ ideas may be identified as a distant background for the psychology of science, although it has not reached a later continuity in the work of other Paraguayan authors. The methodology adopted is both descriptive and critical, with a contextual analysis of the primary sources that are relevant to the problem.

  12. Paraguay: population and the economy.

    Science.gov (United States)

    Sanders, T G

    1986-01-01

    Paraguay's political conflicts and development experiences have been accompanied by compensatory population movements; however, economic and population policies of the past are not adequate to address the current economic challenges. The principal structural problem is dependence on international commodity prices. Since late 1984, the international prices for soya and cotton have declined more than 50%; these 2 products account for 83% of official exports. The external debt has grown significantly in the past 5 years and is increasingly difficult to service. A major problem the government faces in servicing the debt and maintaining economic growth is its inability to get control of foreign exchange. Much of Paraguay's external trade is contraband, with the dollars passing into the black market. As a result of the illegal economy, government earnings have been insufficient to cover expenses. Unemployment stands at 12% because of general economic decline, cuts in government expenditure, and the reduction of investment in hydroelectricity. Occupation of new land, the classic solution by the Paraguayan peasantry, is no longer a viable option since all land is now utilized. About 20-25% of Paraguayans live outside the country, expecially in Argentina. In 1986, a commission drafted an Adjustment Plan that recommended a devaluation of the official gurani rate, tax increases, higher tariffs for public services, and incentives to invest in priority areas; however, this plan has not been implemented to date.

  13. Preliminary study on element mass fraction determination on catfish samples from Paraguay

    International Nuclear Information System (INIS)

    Moreira, Edson G.; Catharino, Marilia G.M.; Vasconcellos, Marina B.A.; Frutos, Sixto A.; Insaurralde, Mario S.

    2013-01-01

    South American catfish (Pseudoplatystoma), commonly known in Spanish as atigrado or surubi and in Portuguese as surubim or pintado is a large fish that typically reaches 1 m long and weighs 60 kg to 80 kg and may be found at the basins of the Amazon, the Sao Francisco and de la Plata rivers, usually in riverbeds and deep wells. Being a much appreciated fish for human consumption, it is quite sought after by fishermen who have been contributing to the reduction of the stocks. This fact attracted the attention of the Paraguayan authorities to the point of imposing restrictions to free fishing and commercialization. This study aims to assist the conservation efforts towards this fish by investigating its exposure to possible pollutants. Preliminary results on element determination on six samples of catfish from Paraguayan rivers are presented. Cs, Co, Fe, Se and Zn were determined by applying an Instrumental Neutron Activation Analysis method. While these element levels were lower than the legislation for human consumption, the elements As, Cr e La were not detected in the samples as they are below the detection limit of the method employed. Atomic Absorption Spectrometry was used to investigate the presence of Cd, Hg and Pb in the samples. Hg was detected in the samples while Cd and Pb were below the detection limit of the method. (author)

  14. Genetic diversity of the floury race of maize Avati Morotî from the Guaraní tribe in Paraguay

    Energy Technology Data Exchange (ETDEWEB)

    Orlando Noldin, O.; Revilla, P.; Ordás, B.

    2016-11-01

    Avati Morotî is a race of floury maize widely used by the Guarani people in South America, whose variability and potential value for breeding has been neglected so far. The objective of this research was to explore the genetic variability within the main Paraguayan race Avati Morotî. We studied the genetic variability available in the 20 accessions of Paraguayan Avati Morotî included in the South American core collection made by CIMMYT. Thirty individuals per accession were genotyped with 30 SSR (simple sequence repeat); we determined genetic diversity and made a cluster analysis in order to define genetic relationships among accessions. Mean of polymorphic loci (0.96), alleles per locus (3.57), alleles per polymorphic locus (3.65), expected (0.48) and observed (0.43) heterozygosity, and coefficient of consanguinity (0.12) revealed that Avati Morotî contains a genetic diversity comparable to the most variable maize races of maize. The cluster analysis classified the 20 populations in eight groups, five of them with a single accession, and a large group representing a central pool of germplasm. These results indicate that there is a large variability available in this race, and encourage the collection of more samples of Avati Morotî, particularly in marginal areas that were scarcely sampled. (Author)

  15. Preliminary study on element mass fraction determination on catfish samples from Paraguay

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Edson G.; Catharino, Marilia G.M.; Vasconcellos, Marina B.A., E-mail: emoreira@ipen.br, E-mail: mbvascon@ipen.br, E-mail: mariliasemmler@uol.com.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Frutos, Sixto A.; Insaurralde, Mario S., E-mail: tony8013@hotmail.com, E-mail: insaurraldemar9@hotmail.com [Universidad Nacional de Asuncion (FCV/UNA), San Lorenzo (Paraguay). Facultad de Ciencias Veterinarias. Departamento de Pesca y Acuicultura

    2013-07-01

    South American catfish (Pseudoplatystoma), commonly known in Spanish as atigrado or surubi and in Portuguese as surubim or pintado is a large fish that typically reaches 1 m long and weighs 60 kg to 80 kg and may be found at the basins of the Amazon, the Sao Francisco and de la Plata rivers, usually in riverbeds and deep wells. Being a much appreciated fish for human consumption, it is quite sought after by fishermen who have been contributing to the reduction of the stocks. This fact attracted the attention of the Paraguayan authorities to the point of imposing restrictions to free fishing and commercialization. This study aims to assist the conservation efforts towards this fish by investigating its exposure to possible pollutants. Preliminary results on element determination on six samples of catfish from Paraguayan rivers are presented. Cs, Co, Fe, Se and Zn were determined by applying an Instrumental Neutron Activation Analysis method. While these element levels were lower than the legislation for human consumption, the elements As, Cr e La were not detected in the samples as they are below the detection limit of the method employed. Atomic Absorption Spectrometry was used to investigate the presence of Cd, Hg and Pb in the samples. Hg was detected in the samples while Cd and Pb were below the detection limit of the method. (author)

  16. Factores Críticos de Éxitos en Busca de la Ventaja Competitiva dentro del Comercio Electronico: un Estudio Empírico en las Empresas Paraguayas

    Directory of Open Access Journals (Sweden)

    Chap Kau Kwan Chung

    2014-10-01

    Full Text Available Electronic commerce has been one of the most active fields of investigation in Information Technology in the last few years. It would be interesting to find out which critical factors keep electronic commerce from achieving success and which factors would be regarded as a sustainable competitive advantage for companies. In this investigation we have developed a model for the achievement of success in electronic commerce based on what is proposed by DeLone and McLean regarding the current model to achieve success in Information Systems, tested by the AMOS (Analysis of Moment Structures, through a sample of 55 Paraguayan companies. As for the bibliography used, we have performed a meta-analysis study with the purpose of identifying the most relevant journals, with their respective current authors and the indicators that represent the importance to the project. The results have yielded valuable conclusions to the Paraguayan reality as only two of the 10 indentified critical factors for success were detected: “Experts in information technology (IT and infrastructure” and “Interoperability of the system”. These are regarded as factors which have been converted into a timely competitive advantage but not into a sustainable competitive advantage through time, due to reasons such as a lack of experts in information technology (IT, particularly regarding the knowledge of electronic commerce and the sluggishness of development of electronic commerce which carries out online activities.

  17. Planning and Nuclear Knowledge Management

    International Nuclear Information System (INIS)

    Grance Torales, V.L.; Lira, L.

    2016-01-01

    Full text: The present case aims to share the experience of the Intellectual Capital Section (ICS), part of Planning, Coordination and Control Department of the Argentine Atomic Energy Commission (CNEA) in its search for a sustainable knowledge management. Among the strategic objectives included in CNEA’s Strategic Plan (SP), is the development, preservation and transference of knowledge and experience. Under this framework, the role initially assumed by the ICS, consisted on the observation and diagnosis of the situation of the Institutional Human Capital (HC), through the study of the main characteristics of the staff of CNEA. The second stage of SP (2015–2025), which consisted of updating the HC data, the incorporation of the concept of “knowledge management” was approved by the authorities of the Institution. Based on this background, in 2016 the objectives of the ICS are aimed at organizing and coordinating a network of knowledge management that involves the entire organization. This new phase implies, among other things, the proposal of a knowledge management policy, interaction with other sectors of CNEA for implementation, analysis of the tools to be used, in order to determine a way and work style that suits the culture and structure of the organization. (author

  18. Temporary storage facility for spent nuclear fuels at the Atucha I nuclear power station (CNA)

    International Nuclear Information System (INIS)

    Wasinger, K.

    1983-01-01

    According to plans of the Argentine Atomic Energy Commission (CNEA), the spent nuclear fuel elements of the Atucha I Nuclear Power Station are to be stored temporarily pending a decision about the ultimate disposal concept. The holding capacity of the first fuel storage facility built by the German KWU together with the whole power plant had been expanded in 1978 to a level good until mid-1982. In 1977, KWU drafted the concept of another fuel storage facility. Like the first one, it was designed as a wet storage system attached to the power plant installations and had a holding capacity of 6944 fuel elements, which corresponds to some 1100 te of uranium. This extends the storage capacity up until 1996. In 1978, KWU was commissioned by CNEA to plan the whole facility and deliver the mechanical and electrical equipment. CNEA themselves assumed responsibility for the construction work. The second fuel storage facility was commissioned three years after the start of construction. (orig.) [de

  19. Status of RERTR activities in Argentina

    International Nuclear Information System (INIS)

    Alvarez, L.; Boero, N.; Pasqualini, E.; Echenique, P.; Ruggirello, G.; Taboada, H.

    2003-01-01

    CNEA, the Atomic Energy Commission of Argentina, has defined development and fabrication activities related with the main fields of the RERTR program. This includes the qualification of high-density fuels for research reactors, the production of radioisotopes from LEU targets and the reduction of the HEU inventory. This paper continues previous presentations in past RERTR meetings and summarizes the main activities performed in these fields during 2002- 2003 and future works. The main part of the CNEA U 3 Si 2 Qualification Program will be completed within this year. The irradiation of the first fuel element was finished and the activities are mainly focused on its PIE works. Regarding the UMo field, development works to provide support for fuel plate fabrication process and to improve understanding of UMo-Al interaction are on progress. Depending on the results of the fuel plate fabrication setup, the manufacturing of full size FE for UMo qualification program could take place during 2004. A program related with the UMo monolithic fuel is also in progress. In the radioisotopes field LEU targets have replaced HEU-Al alloy targets for routine Mo-99 production since November 2002. CNEA approach to minimize the Argentine HEU inventory is also presented (author)

  20. Preparations for the shipment of RA-3 reactor irradiated fuel

    International Nuclear Information System (INIS)

    Goldschmidt, Adrian; Novara, Oscar; Lafuente, Jose

    2002-01-01

    During the last quarter of 2000, in the Radioactive Waste Management Area of the Argentine National Commission of Atomic Energy (CNEA), located at Ezeiza Atomic Center (CAE), activities associated to the shipment of 207 MTR spent fuels containing high enrichment uranium were carried out within the Foreign Research Reactor/Domestic Research Reactor Receipt Program launched by the US Department of Energy (DOE). The MTR spent fuel shipped to Savannah River Site (SRS) was fabricated in Argentina with 90% enriched uranium of US origin and it was utilized in the operation of the research and radioisotope production reactor RA-3 from 1968 until 1987. After a cooling period at the reactor, the spent fuel was transferred to the Central Storage Facility (CSF) located in the waste management area of CAE for interim storage. The spent fuel (SF) inventory consisted of 166 standard assemblies (SA) and 41 control assemblies (CA). Basically, the activities performed were the fuel conditioning operations inside the storage facility (remote transference of the assemblies to the operation pool, fuel cropping, fuel re-identification, loading in transport baskets, etc.) conducted by CNEA. The loading of the filled baskets in the transport casks (NAC-LWT) by means of intermediate transfer systems and loaded casks final preparations were conducted by NAC personnel (DOE's contractor) with the support of CNEA personnel. (author)

  1. Cna 1 spent fuel element interim dry storage system thermal analysis

    International Nuclear Information System (INIS)

    Hilal, R. E; Garcia, J. C; Delmastro, D. F

    2006-01-01

    At the moment, the Atucha I Nuclear Power Plant (Cnea-I) located in the city of Lima, has enough room to store its spent fuel (Sf) in their two pools spent fuel until about 2015.In case of life extension a spend fuel element interim dry storage system is needed.Nucleolectrica Argentina S.A. (N A-S A) and the Comision Nacional de Energia Atomica (Cnea), have proposed different interim dry storage systems.These systems have to be evaluated in order to choose one of them.The present work's objective is the thermal analysis of one dry storage alternative for the Sf element of Cna 1.In this work a simple model was developed and used to perform the thermal calculations corresponding to the system proposed by Cnea.This system considers the store of sealed containers with 37 spent fuels in concrete modules.Each one of the containers is filled in the pool houses and transported to the module in a transference cask with lead walls.Fulfill the maximum cladding temperature requirement ( [es

  2. Manufacturing at industrial level of UO2 pellets for the fuel elements of the Atucha I Nuclear Power Plant

    International Nuclear Information System (INIS)

    Dyment, I.G.; Noguera Rojas, Francisco

    1982-01-01

    The interest to produce fuel elements within a policy of self sufficiency arose with the installation of Atucha I. The first steps towards this goal consisted in processing the uranium oxide, transforming it into fuel pellets of high density. The developments towards the fabrication of said pellets, performed by CNEA since 1968, first at a laboratory level and afterwards on an industrial scale, allowed CNEA to obtain its own technological capability to produce 400 kg of UO 2 per day. The fuel pellets manufacturing method developed by CNEA is a powder-metallurgical process, which, besides conventional equipment, involves the use of special equipment that required the performance of systematic testing programmes, as well as special training at operational level. The developed processes respond to a modern and advanced technology. A general scheme of the process, starting with a directly sinterable UO 2 powder, is described, including compacting of the powder into pellets, sintering, control of the temperature in the sintering and reduction zones and of the time of permanence in both zones, and cylindric rectifying of the pellets. During the whole process, specialized personnel controls the operations, after which the material is released by the Quality Control Department. The national contribution to the manufacturing technology of the pellets for fuel elements of power and research reactors was of 100%. (M.E.L.) [es

  3. Training in radionuclide methodology and applications in biomedical area

    International Nuclear Information System (INIS)

    Signoretta, C.

    1998-01-01

    Full text: Training in the field of radionuclide methodology and applications in biomedical area is important to assure that radionuclide should duly be used without risk for patients or for technicians manipulating them. The National Atomic Energy Commission (CNEA) from its creation is giving training courses of different technical levels to those working in science and technology. The Course on Radionuclide Methodology and application is the most continuous, varied and requested within CNEA. This is a basic course mainly given to Biochemistry and Medicine. Its goal is to give both theoretical and practical knowledge for use and application of radionuclides bearing in mind radiological safety regulations. Personnel from CNEA and Nuclear Regulatory Authority (ARN) carry out teaching. On the other hand, a course for Technicians in Nuclear Medicine is giving supplying knowledge in this field, as well as expertise and practice to attend a responsible Medical Doctor. These curses comprise radionuclide methodology, anatomy, physiology, instrumentation and practical applications in Nuclear Medicine. Statistics concerning these course are giving. (author) [es

  4. Radioactive wastes and spent fuels management in Argentina

    International Nuclear Information System (INIS)

    Maset, Elvira R.

    2006-01-01

    CNEA was created in 1950 and since then has carried out research and development activities, production of radioisotopes, medical and industrial applications, and those activities related with the nuclear fuel cycle, including the operation of two nuclear power stations. More ever, different public and private institutions use radioactive materials in medical, industrial and research activities. These activities generate different types of radioactive waste, desuse sealed sources and spent fuel. The management of radioactive waste of all types produced in the country, as the spent nuclear fuel of power and research reactors and the used radioactive sources was always and it is at present a CNEA's responsibility. In February 2003, according to the Law No. 25.018, called 'Management of Radioactive Waste Regimen', the 'Radioactive Waste Management National Programme' was created by CNEA to fulfill the institutional functions and responsibilities established in the Law, in order to guarantee the safe management of radioactive waste according to the regulations established by the Argentine Nuclear Regulatory Agency and to the legislation in force. (author) [es

  5. Progress in converting 99Mo production from high-to-low-enriched uranium - 1999

    International Nuclear Information System (INIS)

    Snelgrove, J.L.; Vandegrift, G.F.; Conner, C.; Wiencek, T.C.; Hofman, G.L.

    1999-01-01

    Over this past year, extraordinary progress has been made in executing our charter to assist in converting Mo-99 production worldwide from HEU to LEU. Building on the successful development of the experimental LEU-foil target, we have designed a new, economical irradiation target. We have also successfully demonstrated, in collaboration with BATAN in Indonesia, that LEU can be substituted for HEU in the Cintichem target without loss of product yield or purity; in fact, conversion may make economic sense. We are interacting with a number of commercial producers - we have begun active collaborations with the CNEA and ANSTO; we are working to define the scope of collaborations with MDS Nordion and Mallinckrodt; and IRE has offered its services to irradiate and test a target at the appropriate time. Conversion of the CNEA process is on schedule. Other papers presented at this meeting will present specific results on the demonstration of the LEU-modified Cintichem process, the development of the new target, and progress in converting the CNEA process. (author)

  6. Um panorama da literatura relevante sobre Itaipu

    Directory of Open Access Journals (Sweden)

    Tomaz Espósito Neto

    2013-08-01

    The Brazilian-Paraguayan hydroelectric of Itaipu is considered an important milestone in the relations between Brazil and Paraguay, as it has created a permanent bond between the two countries. Nowadays, Itaipu is still one of the most important generators of electric energy in the world, being responsible for over 25 percent of the energy generated in Brazil and about 95 percent of the electricity consumed in Paraguay. The various consequences of the construction of Itaipu, in particular the changes occurred in the power balance structure in Cone Sul are phenomena that have been largely studied, and there is a multiplicity of interpretations on the theme. This paper aims to provide an overview of the relevant literature on Itaipu.

  7. Distribution and Diversity of the Cryptic Ant Genus Oxyepoecus (Hymenoptera: Formicidae: Myrmicinae in Paraguay with Descriptions of Two New Species

    Directory of Open Access Journals (Sweden)

    T. Delsinne

    2012-01-01

    Full Text Available We discuss the diversity and distribution of the ant genus Oxyepoecus in Paraguay. Oxyepoecus inquilinus is recorded for the first time, and new distribution data are given for O. rastratus and O. vezenyii. Published data for O. bruchi, O. rastratus, O. reticulatus, and O. vezenyii are summarized. Two new species are described (O. bidentatus n. sp. and O. striatus n. sp., and a key to the workers of the seven Paraguayan Oxyepoecus species is provided. At Teniente Enciso National Park, four species cooccur. This locality appears as a promising site for studies documenting the biology of this poorly known ant genus, and because of the IUCN “vulnerable“ Red List classification of O. inquilinus, the importance of the Teniente Enciso National Park for biological conservation is clearly established.

  8. Agronomical and phytochemical evaluation of Stevia rebaudiana genotypes

    Directory of Open Access Journals (Sweden)

    Vouillamoz, José F.

    2016-07-01

    Full Text Available The agronomical potential and the phytochemical variability of 18 genotypes of the Paraguayan plant Stevia rebaudiana have been investigated in Switzerland in order identify the best genotype for local cultivation. Over a two years period, yields in dry leaves ranged from 10 to 170 g m-2, with a percentage of leaves ranging from 53 to 75 %. HPLC analyses showed a notable variability in phytochemical composition, with stevioside content ranging from 0.3 to 7.9 % w/w and rebaudioside A from 0.3 to 6.5 % w/w. Cultivation of S. rebaudiana in Switzerland is feasible. With a density of 10 plants per m2, the potential yields of dry matter are approximately 1-2 t ha-1. The most productive genotypes (Pharmasaat, Hem Zaden, Stepa and Mediplant 3 and 11 will be submitted to the industry for organoleptic evaluation.

  9. Religiones omnívoras: el chamanismo chané y las relaciones interétnicas

    Directory of Open Access Journals (Sweden)

    Diego Villar

    2007-12-01

    Full Text Available Of Arawak origin, the ethnic group identified as the Chané indigenous group in the Amerindian literature, settled on the eastern slopes of the Andes before the Conquest of the Occidental region or Paraguayan Chaco took place. There, this group engaged in complex inter-ethnic relationships with other Guarani-speaking ethnic groups, Chaco natives, and thereafter, as the colonization process consolidated, with several Creole social agents: landowners, foremen of sugar plantations, the military, and missionaries. Supported by ethnographic and ethno-historical documents, the author suggests that the open, flexible, malleable and integrating organization of Chané shamanism was marked by these multiple historical interactions, thereby becoming an ideal symbolic language to reflect the problems arising from situations of intercultural contact.

  10. Filial care and the relationship with the elderly in families of different nationalities.

    Science.gov (United States)

    Faller, Jossiana Wilke; Zilly, Adriana; Alvarez, Angela Maria; Marcon, Sonia Silva

    2017-01-01

    identify how filial care and the relationship with the elderly occur in families of different nationalities. qualitative study carried out in a town on the triple frontier of Paraná, comprising 33 elderly people of five different nationalities, adopting the Symbolic Interactionism and the Grounded Theory as theoretical-methodological strategy. among Lebanese people, the Muslim religion teaches children to obey and respect parents; among French, distant family relationships and institutions for the elderly stand out. Paraguayans hold close family relationships; Chinese people consider filial care as a tacit obligation; Brazilians, in turn, tend to embrace and take care of their parents in old age. family care prevailed, but the traditions of each society lead the actions of that care, demanding health professionals' capacity of recognizing in which context the elderly is inserted.

  11. Professional practices: a short introduction of national nuclear activities to university students; Practicas profesionales: breve incursion laboral de alumnos universitarios en las actividades nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Martin, Hugo R [Comision Nacional de Energia Atomica, Cordoba(Argentina). Regional Centro

    2005-07-01

    This paper is a continuation of precedents annual works presented in AATN Meetings, informing about activities of Institutional Affairs Sector of Central Region delegation of National Atomic Energy Commission (CNEA-RC). Regular activities in Cordoba city, have been carried out during half a century in urban zone of Cordoba City. Activities show a long misunderstanding and confrontations with the provincial and municipal authorities, and with the neighbors and environmentalist antinuclear organizations. The experience indicates that the people demands for the protection of health or environment, and sometimes the claiming for closing some facilities, have been directly related with what people really know about the activities in the site. The common denominator that one observes in the conflicts of the past, is the high degree of ignorance on the part of the citizenship on the activities that are carried out in the place. This is valid for the neighbors, the competent authorities and even for Cordoba's university, scientific and technical qualified community. Starting from the recognition of the responsibility that has the institution of informing the population appropriately on what is carried out in their facilities, the CNEA-RC had developed an institutional process of Professional Practices of university students which is described in this paper. The experience of two years, has shown that results are positive because the university community (teachers, students and researchers) knows now the real status of national nuclear activities. (author) [Spanish] Este trabajo pretende dar continuidad a la informacion que anualmente, a traves de las reuniones de la AATN, se brinda desde la Subgerencia de Asuntos Institucionales de la CNEA, sobre los resultados obtenidos en las actividades que se realizan en Cordoba. Como se ha informado antes, debido al emplazamiento urbano de la Regional Centro de CNEA (CNEA-RC) en un predio compartido con la empresa Dioxitek S.A. que

  12. El habla de los afroparaguayos: un nuevo renglón de la identidad étnica

    Directory of Open Access Journals (Sweden)

    John M. Lipski

    2009-06-01

    Full Text Available El presente trabajo presenta un estudio etnolingüístico de tres comunidades afroparaguayas: Emboscada (fundada en el siglo XVIII por pardos libres y Camba Cua y Laurelty (fundadas en el siglo XIX por soldados negros libres que llegaron con el general uruguayo José Gervasio Artigas. Los datosconfirman la existencia de configuraciones lingüísticas que establecen vínculos claros con otras comunidades de habla afrohispánicas, entre ellas el Valle del Chota (Ecuador, los Yungas (Bolivia, Sama-Las Yaras (Perú, el Chocó (Colombia y Helvécia (Brasil. Entre las características claves sedestacan los plurales invariables y con una sola marca de plural (las persona, los militar, los verbos invariables para persona y número y la ausencia del género nominal femenino (loh mujere, algún comida. -- The present work offers an ethnolinguistic study of three Afro-Paraguayan communities: Emboscada (founded in the 18th century by free blacks, and Camba Cua and Laurelty (founded in the 19th century byfree black soldiers who arrived with the Uruguayan general José Gervasio Artigas. The data confirm the existence of linguistic structures that link Afro-Paraguayans with other Afro-descendent communities, such as the Chota Valley (Ecuador, the Yungas (Bolivia, Sama-Las Yaras (Peru, Chocó (Colombia, and Helvécia (Brazil. Among the principal traits are invariant plurals with a single plural marker (las persona, los militar, verbs invariant for person and number, and lack of feminine gender concord (loh mujere, algún comida.

  13. Visual acuity and refraction by age for children of three different ethnic groups in Paraguay

    Directory of Open Access Journals (Sweden)

    Marissa Janine Carter

    2013-04-01

    Full Text Available PURPOSE: To characterize refractive errors in Paraguayan children aged 5-16 years and investigate effect of age, gender, and ethnicity. METHODS:The study was conducted at 3 schools that catered to Mennonite, indigenous, and mixed race children. Children were examined for presenting visual acuity, autorefraction with and without cycloplegia, and retinoscopy. Data were analyzed for myopia and hyperopia (SE ≤-1 D or -0.5 D and ≥2 D or ≥3 D and astigmatism (cylinder ≥1 D. Spherical equivalent (SE values were calculated from right eye cycloplegic autorefraction data and analyzed using general linear modelling. RESULTS: There were 190, 118, and 168 children of Mennonite, indigenous and mixed race ethnicity, respectively. SE values between right/left eyes were nonsignificant. Mean visual acuity (VA without correction was better for Mennonites compared to indigenous or mixed race children (right eyes: 0.031, 0.090, and 0.102 logMAR units, respectively; P<0.000001. There were 2 cases of myopia in the Mennonite group (1.2% and 2 cases in the mixed race group (1.4% (SE ≤-0.5 D. The prevalence of hyperopia (SE ≥2 D was 40.6%, 34.2%, and 46.3% for Mennonite, indigenous and mixed race children. Corresponding astigmatism rates were 3.2%, 9.5%, and 12.7%. Females were slightly more hyperopic than males, and the 9-11 years age group was the most hyperopic. Mennonite and mixed race children were more hyperopic than indigenous children. CONCLUSIONS: Paraguayan children were remarkably hyperopic and relatively free of myopia. Differences with regard to gender, age, and ethnicity were small.

  14. Development of the Cerro solo deposit and uranium favorability of the San Jorge Gulf Basin, province of Chubut

    International Nuclear Information System (INIS)

    Navarra, P.R.; Benitez, A.F.

    1997-01-01

    In the future the uranium exploration activities of CNEA would tend to improve the knowledge of geology and uranium favorability; to perform prospection tasks, and research and development in exploration technologies, to contribute to be in a position to meet the requirements of the country in the long term. On the other hand, a strong growth of nuclear capacity is expected in the first two decades of the next century. Based on its promising grade, the Cerro Solo uranium ore deposit was selected in 1990 by the CNEA to carry out an assessment project. The intensive exploration level was accomplished, as follows: definition of general characteristics of the main orebodies; detailed geologic studies; estimation of resources with adequate data; and preliminary selection of mining-milling methods to estimate the potential profitability of the project. The deposit belongs to the sandstone type. The mineralized layers are distributed into the fluvial sandstones and conglomerates of the cretaceous Chubut Group, lying 50 to 130 m deep Resources of the deposit, with an average grade of 0.3% U, in tonnes of recoverable uranium at costs of up to $80/kg U, are: Reasonable Assured Resources (RAR): 800 t U, Estimated Additional Resources, Category I (EAR-I): 2100 t U. Follow-up drilling programmes are being performed at present in some of the target sites defined in the paleochannel that hosts the Cerro Solo deposit, in order to establish the hypothetical resources of the area. The sites were determined as a result of the exploration that CNEA conducted in the Pichinan uranium district. Recently a regional research project was formulated, for the detailed exploration in the San Jorge Gulf Basin, where the Chubut Group is distributed. 17 refs, 4 figs

  15. UBERA-6 project: Achievements of 4 working years

    International Nuclear Information System (INIS)

    Blaumann, H; Fernandez, C; Dell Occhio, L; D Ovidio, C; Fabro, J; Miceli, M; Novara O; Perez, A; Taboada, H

    2009-01-01

    On May 2005 the President of CNEA created the UBERA-6 project, belonging to the former Technology and Environmental Management, with the aim to convert to Low Enriched Uranium (LEU) the RA-6 reactor core, to swap with the US Department of Energy (US-DoE) equivalent inventories of High Enriched Uranium (HEU) for LEU, to export to USA the spent HEU core and to recover and downblend to LEU remnant HEU inventories contained in fuel and irradiation target scraps. By means of two contracts signed by CNEA and US-DoE, acquisition of consumables and graphite reflectors, the fabrication of LEU core replacement, conditioning, transport and exportation of spent HEU core and subsequent supply of fresh LEU for fuel and irradiation targets used in our research reactors were costed. During July, 2006 468 HEU based fresh plates were exported to USA. On June 30th, 2007 the RA-6 reactor temporarily stopped working and its personnel remover the HEU core to the auxiliary pool. On November 7th the former spent HEU based core was exported to USA. During May and July, 2008 the new RA-6 reactor LEU based core and control assemblies were provided. During March, 2009 the RA-6 reactor became critical. For recovering and blending down of remnant HEU inventories, the Triple Height Laboratory (LTA) was refurbished. A Supplemental Agreement to one of the original contract between CNEA and US-DoE will financially support the refurbishment of the Radiochemical Facility Laboratory (LFR) and so reprocess irradiated HEU retained in radioisotope production filters to downblend into LEU, as well as the separation of the pair Sr90-Y90 and of Cs137 inventories for further application in Nuclear Medicine. [es

  16. Macro-localization study of a commercial CAREM nuclear power plant in the province of Formosa : state of progress

    International Nuclear Information System (INIS)

    Torino Araoz, Ines

    2011-01-01

    The framework agreement signed between Formosa Province and the National Atomic Energy Commission (CNEA) in order to establish formal relations of cooperation with regard to projects of common interest, research and development, technology services, human resource training in the areas inherent to CNEA functions, resulted in a specific agreement in order to analyze the potential location of a CAREM commercial nuclear power plant in the Province. Thus, the site survey study which is under development aims at the determination of one or more sites, which meet the criteria set - security related and not related - and is/are eligible for the installation of the plant. The site selection methodology used to develop the study was based on documentation and bibliography of the International Atomic Energy Agency and CNEA. Taking into account these references, the study began divided into 3 levels; currently, Level I is approved and the analysis of Level II is completed. Each of these levels covers different aspects that must be evaluated during the selection process. That one is a complex analysis, which was carried out through the participation and joint efforts of a multidisciplinary team consisting of CNEA’s staff and the Province of Formosa, which in turn had the cooperation of various institutions. Partial results of the Level II document, determine the pre selection of three potential areas in the province. In turn, it is important to remember that the site survey (regional) study is the first stage in the selection process. Then, the site evaluation stage (micro siting study) and the preparation of the Preliminary Safety Report have to be implemented, in order to establish the definitive site for the plant installation. (author) [es

  17. The IAEA Technical Cooperation Programme as a Knowledge Multiplier Mechanism for Nuclear Medicine — The Case of the Nuclear Medicine Knowledge Network in Argentina

    International Nuclear Information System (INIS)

    Belinco, M.; Boado Montero, G.; Di Lorenzo, D.; De Rose, G.

    2015-01-01

    This poster aims at: – Highlighting the relevance of the conformation of a Nuclear Medicine (NM) Network; – Shedding light on the influence of the IAEA TCP on the Network; – Emphasizing on the role of women as decision-makers in NM. CNEA together with the MINPLAN led the creation of the NM Network which now assembles 20 institutions. Its main purposes are: to strengthen ties among institutions; to federalize, spread and exchange knowledge in NM; to standardise protocols; to enhance interdisciplinary work and to harmonise the levels of capacity building nationally. These goals are reached through collaboration, teaching and research activities; already being attained through training in new Centers and the expansion of NM poles throughout the country within the framework of the National Programme of NM. NM has been a strategic area of the nuclear sector in Argentina since its beginning. There are three essential milestones for this continuity and for the establishment of this Network: NM as a state policy; the institutional policy within CNEA and the permanent support and acknowledgment from the IAEA. The geographic and demographic features of Argentina call for a federal working scheme such as the one carried out by CNEA; this has been replicated in a six-decade-networking among NM institutions and enhanced by including NM in the Public Health agenda. The IAEA TCP plays a key role as a knowledge multiplier mechanism in NM by supporting the creation of networks and endorsing the CPF 2014–2021 which fosters this cooperation link. Since 1976, thanks to the TCP, 456 people were trained and over 40 projects were financed in this area. Regarding female participation in NM, no gender barriers were observed, since the main decision-makers in this field are women, who handle issues sensitively, considering the direct impact NM has on people’s daily lives. (author)

  18. Design of the Fuel Element for the RRR Reactor (Australia)

    International Nuclear Information System (INIS)

    Estevez, E.A.; Markiewicz, M.E.; Gerding, R.

    2003-01-01

    The supply to the Replacement Research Reactor ( RRR ) to Australia represents a technological goal for our country, as much for the designers and manufacturers of this irradiation facility ( Invap SE ), as well for the responsibles of the fuel elements ( FE ) design and the suppliers of the first core ( CNEA ).In relation with the FE, although the conceptual design and fabrication technology of the FE are similar to the just developed and qualified by CNEA ( plane plates MTR fuel type ), the characteristics of this new reactor imposes most severe operation conditions on them than in previous supplies.In that sense, two distinguishing characteristics deserve to be shown: a) The magnitude of the hydrodynamics loads acting on the FE due to the coolant ascendent flow direction, and mainly, the very high flow velocities between the fuel plates ( aproximately five times higher than which presents in others Argentine FE actually in operation. b) The use of U3Si2 as fuel material.CNEA has started a programme to qualify this type of fuel.As result of these higher loads under irradiations and with the objective to maintain the high reliability level reached by our FE ( very low failure rates ), it was necessary to introduce FE mechanical-structural design modifications respect to the ECBE or standard design version, and to verify these changes through hydrodynamics tests on a 1:1 scale prototype.In this paper it is described the mechanical-structural FE design with special emphasis in the innovatives aspects incorporated.The design criteria established in function of the solicitations and limitating effects present under irradiation conditions.Also, a brief description of the proposed programme to verify and evaluate this design is presented, including analytical and numerical calculus of stresses acting on the fuel plates and others FE components, pressure loss hydrodynamics tests and endurance essays

  19. Nuclear activity. Decree No. 1.390. Regulation of Law No. 24.804 (27-Nov-1998; B.O. 4-Dec-1998)

    International Nuclear Information System (INIS)

    1998-01-01

    This decree regulates various aspects of the National Law of Nuclear Activity of the Argentine Republic, in order to determine its scope, define the procedures for its application, and establish the executive functions of the institutions emerging from this Law: Empresa Nucleoelectrica Argentina Sociedad Anonima (NASA), Comision Nacional de Energia Atomica (CNEA) and the Autoridad Regulatoria Nuclear (ARN), former Ente Nacional Regulador Nuclear. The National State shall establish the nuclear policy and shall develop the Research and Development functions through the Comision Nacional de Energia Atomica (CNEA) and the regulatory and control functions through the Autoridad Regulatoria Nuclear (ARN). The nuclear activities of production, research, development and service rendering which might be organised commercially, shall be implemented within the framework of the nuclear policy and regulation exercised within the competence of the above mentioned organisms. The Commission shall have to assume the responsibility of the management of radioactive wastes of low, medium and high activity and establish the acceptance requirements that shall have to be approved by the ARN. Moreover, it shall determine the shut-down of the nuclear power plants and any other relevant nuclear facility concurrently with ARN, through the Shut-down Project of each facility. With the aim of the privatisation of the nuclear power generation activity depending from the enterprise NASA, the constitution of a society is set up: 'Generadora Nuclear Argentina Sociedad Anonima' (GENUAR SA). Also, the amount of the royalty that shall be paid to CNEA for research and development activities is fixed. The above mentioned society will be the holder of the concession of the use of nuclear goods and the responsible entity for the construction and/or operation licenses

  20. Environmental Audit: 'A tool used to evaluate and improve the institutional environmental performance'

    International Nuclear Information System (INIS)

    Goulart, Helga

    2009-01-01

    The Environmental Audits emerged in the late 70 's in order to verify compliance with industrial activities with environmental standards. The same was done internally by the organizations to avoid late fines and penalties imposed by enforcement authorities. At present, environmental audits are used not only to identify environmental problems that must be corrected, but which now forms part of a procedure for identifying opportunities for continual improvement of the activities of a particular organization. Environmental audits undertaken by Management in the CNEA Environmental Activities meet this proactive role detailed above, whose main objective is also to verify compliance with environmental regulatory framework applicable to each site, to identify environmental improvements that must be applied activities to achieve better performance from them. This paper aims to present the results in the recognition phase of the CNEA 's environmental situation through conducting preliminary environmental analysis and comparison with results at the current stage of implementation of the Institutional Environmental Management System through environmental audits, showing the procedures, issues and standards considered and the evolution of each site's environmental performance in implementing the proposed corrections. The central idea of Management Environmental Activities is to show the different sectors and areas of the institution that the environmental audit, applied in the context of environmental management is an essential tool that enables to encourage staff in environmental issues, making that they are directly participating in management activities and is the most concrete to demonstrate both internally and externally achievements in a certain period of time and activities to achieve the policy of continuous improvement in environmental performance of the CNEA. (author)

  1. National Atomic Energy Commission. Decree No. 1540, August 30 1994

    International Nuclear Information System (INIS)

    1994-01-01

    One of the objectives of the reorganization process of Argentina's public sector was to transfer to the private sector some of the Nation's productive activities, including those concerning the nuclear field. As a consequence, by Decree No. 1540 of August 30, 1994, (B.O. 2-Dec-94), CNEA's functions were partially reorganized. According to Decree No. 1540, the National Atomic Energy Commission (CNEA) maintained the missions and functions established by Decree-Law No. 22.498/56, with the exception of the regulation and surveillance of nuclear activities and the nuclear power generation activities. For the fulfillment of these activities, both the National Board of Nuclear Regulation (Ente Nacional Regulador Nuclear - ENREN) and Nucleoelectrica Argentina S.A. (NASA), were created. The National Board of Nuclear Regulation (ENREN), as an autarchical entity reporting to the Presidency of the Nation, shall be administered by a Board of Directors and shall be responsible for surveying and controlling all nuclear activities, shall suggest regulations and standards to ensure radiological and nuclear safety, personal protection, a controlled use of nuclear materials, licensing and surveillance of nuclear installations, and compliance with international safeguards. Nucleoelectrica Argentina S.A. (NASA) shall be organised as a corporation, reporting to the Ministry of Economy and Public Works and Services (Ministerio de Economia y Obras y Servicios Publicos) who will approve its statures. NASA shall take care of nuclear power generation at the Atucha I and Embalse nuclear power plants, as well as the construction, start-up and operation of the Atucha II nuclear power plant. As far as royalties are concerned, the Decree obliges Nucleoelectrica Argentina S.A. to pay CNEA for the performance of research and development activities, and to the ENREN an yearly regulatory tax per megawatt of installed nuclear power generation capacity. Also, Nucleoelectrica Argentina S.A. is declared

  2. Nuclear medicine quality assurance program in Argentina

    International Nuclear Information System (INIS)

    Levi de Cabrejas, Mariana; Arashiro, Jorge G.; Giannone, Carlos A.

    1999-01-01

    A two steps program has been implemented: the first one is the quality control of the equipment and the second one the development of standard procedures for clinical studies of patients. A training program for doctors and technicians of the nuclear medicine laboratories was carried out. Workshops on instrumentation and quality assurance in nuclear medicine have been organized in several parts of the country. A joint program of the CNEA and the University of Buenos Aires has trained medical physicists. A method has been established to evaluate the capability of the laboratories to produce high quality images and to follow up the implementation of the quality control program

  3. Proposing a Balance Scored Card to Communicate and Follow a NKM Implementation

    International Nuclear Information System (INIS)

    Vetere, C. L.; Gomiz, P. R.; Caballero, D. H.

    2016-01-01

    Full text: The balance scored card (BSC) is a tool developed to link strategies to the organizational key objectives and results, and a useful method to show and communicate the strategy, to follow its development and obtain feedback to learn about the implementation of a nuclear knowledge management domain. This report gives a brief summary of the method adopted for developing a BSC linked to a certain nuclear knowledge domain in the CNEA and it provides an example of its application to the radioactive waste management knowledge area. (author

  4. Physico Chemistry of the Chlorination of Aluminum Claddings in the Framework of HALOX Project

    International Nuclear Information System (INIS)

    Alvarez, Fabiola; De Micco, Georgina; Bohe, Ana; Pasquevich, Daniel

    2003-01-01

    The conditioning of spent nuclear fuels from test and research reactors requires a previous physicochemical treatment to stabilize them chemically.A possible way of processing is through what was called in CNEA as Process HALOX (Halogenation and Oxidation).It consists of the selective separation of cladding by halogenation and the subsequent oxidation of the core, previously to insert it into a vitreous matrix.The halogenation aim is to transform the constituents of the 6061aluminum alloy into volatile halides.In this work we present preliminary results of the chlorination of two aluminum alloys: AA 6061 and a type of CuZnAl alloy

  5. Radioisotope measurement system

    International Nuclear Information System (INIS)

    Villanueva Ruibal, Jose

    2007-01-01

    A radioisotope measurement system installed at L.M.R. (Ezeiza Atomic Center of CNEA) allows the measurement of nuclear activity from a wide range of radioisotopes. It permits to characterize a broad range of radioisotopes at several activity levels. The measurement hardware as well as the driving software have been developed and constructed at the Dept. of Instrumentation and Control. The work outlines the system's conformation and its operating concept, describes design characteristics, construction and the error treatment, comments assay results and supplies use advices. Measuring tests carried out employing different radionuclides confirmed the system performing satisfactorily and with friendly operation. (author) [es

  6. Argentine activities related to the development of low enriched fuel elements

    International Nuclear Information System (INIS)

    Giorsetti, Domingo R.; Perez, Edmundo E.

    1983-01-01

    Within the framework of the RERTR Program and supported by the technical cooperation work agreed upon between the U.S.A. and Argentina in May 1979, the CNEA Nuclear Fuel Department - Low Enriched Fuel Elements Project (ECBE Project), has carried on its own program for developing fuels with low enrichment for research and test reactors. Up to the present, its main objective has been to replace the highly enriched fuel used in its only reactor (RA-3) for research, development and radioisotopes production. The basic stages of the Argentine Program are shown in Table 1. At a meeting held in Vienna in March, 1980, the CNEA stated that its development of fuels with low enrichment would be in two fuel lines: UAl x -Al and U 3 O 8 -Al, and that its aim would be to reach uranium densities of 18-2.2 g/cm 3 for the UAI x -Al line and 2.4-3.0 g/cm 3 for the U 3 O 8 line. At the international meeting held at ANL in November, 1980, and after having received depleted uranium and uranium with 20% and 45% enrichment (purchased from the U.S.A. for manufacturing miniplates and possible standard fuels) to carry on the proposed development, CNEA anticipated -- after its first tests -- that the conditions were satisfactory for reaching uranium densities of 2.4-3.0 g/cm 3 in U 3 O 8 -Al fuel and of 2.4 g/cm 3 in UAI x -Al fuel. In February 1981, after Argentina accepted the obligation of paying for the irradiation service, authorization was obtained for irradiating miniplates in the Oak Ridge Reactor within the RERTR Program. In June 1981, the first set of miniplates was sent to Oak Ridge National Laboratory (ORNL). The maximum actual densities reached at that time were 3.12 g/cm 3 with U 3 O 8 -Al and 2.52 g/cm 3 with UAl x -Al. During a visit of the CNEA Project Technical Manager to the Argonne National Laboratory (ANL) in July 1981, and after exchanging ideas with ANL professional staff, the CNEA decided to incorporate a new line of development, that of U 3 Si-Al. Three months later

  7. Design and construction of a basic principle simulator: an experiment

    International Nuclear Information System (INIS)

    Fernandez, O.; Galdoz, E.; Flury, C.; Fontanini, H.; Maciel, F.; Rovere, L.; Carpio, R.

    1992-01-01

    This paper describes activities developed over design and building of a Basic Principle Simulator for nuclear power plants. This simulator has been developed in Process Control Division of Bariloche Atomic Center, Argentina. This project was sponsored jointly by CNEA and Atomic Energy International Organization, through the United Nations Program for Development. The paper specially emphasizes aspects like: architecture design methodology of real time simulators; graphic environment and interfaces design for users and instructor interaction, and for display information; test and validation of the used models; and human resources formation. Finally describes the actual implementation of the simulator to be used in Embalse Nuclear Power Plant. (author)

  8. Decommissioning of nuclear facilities: a growing activity in the world

    International Nuclear Information System (INIS)

    Anasco, Raul

    2001-01-01

    Nuclear power plants and nuclear facilities are no different from normal buildings and factories. Eventually, they become worn-out or old fashioned, too expensive to maintain or remodel. Decommissioning a nuclear facility is different from retiring other types because of the radioactivity involved. The most important consideration in nuclear decommissioning is to protect workers and the public from exposure to harmful levels of radiation. General criteria and strategies for the decommissioning of nuclear facilities are described as well as the present decommissioning activities of the Argentine CNEA (author)

  9. Abstracts of the 1. National congress of hydrogen and sustainable energy sources

    International Nuclear Information System (INIS)

    2005-01-01

    The First Argentine National Congress of Hydrogen and Sustainable Energy Sources was organized by the Instituto of Sustainable Energy and Development CNEA, in San Carlos de Bariloche, between the 8th and 10th of June of 2005. In this event 88 papers were presented in the following sessions, on these subjects: 1.-Hydrogen-Materials Interaction. 2.-Materials Damage. 3.-Production and Purification. 4.-Storage and Transportation. 5.-Fuel Cells. 6.-Prototypes and Demonstration Plants. 7.-Eolic Energy. 8.-Solar Energy. 9.-Biomass. 10.-Small Hydroelectric Plants. 11.-Other Activities. 12.-Hybrid Fuels. 13.- Reforming, Materials, Catalysis, Processes. 14.-Projections and Energy Prospective

  10. Cost estimation of interim dry storage for Atucha I NPP

    International Nuclear Information System (INIS)

    Bergallo, Juan E.; Fuenzalida Troyano, Carlos S.

    2007-01-01

    A joint effort between NASA and CNEA has been performed in order to evaluate and fix the strategy of interim spent fuel storage for Atucha I nuclear power plant. In this work the cost estimation on the proposed system was performed in order to fix the parameter and design criteria for the next engineering step. The main results achieved show that both alternatives are all in the same range of costs per unit of mass to be stored, the impact on electricity cost is less than 1 US mills/KWh and the scaling factor achieved is 0.85. (author) [es

  11. Summary of activities of the Research Branch during 1981

    International Nuclear Information System (INIS)

    1982-07-01

    A general view of the work performed during 1981 by CNEA's Research Branch in basic and applied research is provided. The information includes the main activities and achievements in: 1) Physics Department: Tandar Project; Technical Assistance and Engineering; Experimental and Theoretical Nuclear Physics; Solid State Physics. 2) Reactor Chemistry Department: Chemical Control Division; Moderator and Coolant Physical-Chemistry Division; Radiation Chemistry Division. 3) Radiobiology Department: Radiation Pathology; Cellular Biology; Somatic Effects of the Ionizing Radiations; Genetics; Radiomicrobiology; Bioterium; Irradiation and Dosimetry Section, and, finally, in Biomathematics, Labelled Molecules and Radiochemistry. (M.E.L.) [es

  12. Knowledge management: an analysis of the tools of expert knowledge capture

    International Nuclear Information System (INIS)

    Fernandez Larcher, A.

    2009-01-01

    This work proposes the revision of the strategies and tools used to elicit and capture expert knowledge, particularly those suggested by the EPRI and the IAEA. The main objective of this paper consists of examining the effectiveness and scope of the methodologies proposed, in order to apply them and make them suitable according to our institutional context. This article emphasizes the value and usefulness of the interview's methods with the aim of implementing some of them to the activities created and organized by CNEA Nuclear Knowledge Management Group, especially to the ConRRad Project. (author)

  13. Implementation of requirements of environmental management (ISO 14000) for the decommissioning of the heavy water plant

    International Nuclear Information System (INIS)

    Gonzalez, Maria I.; Otero de Eppenstein, Marta; Tosi, Lidia E.; Sabio, Manuel

    2000-01-01

    The National Atomic Energy Commission (CNEA) of Argentina has a project of decommissioning in the heavy water plant (Planta Experimental de Agua Pesada - PEAP). The aim of this project is to get some experience for decommissioning of nuclear plants and to achieve knowledge about the application of the requirements in environmental management. The project is being carried out according to ISO 14001 standards 'Environmental Management Systems'. The objectives were taken from the model without any expectation of achieving the complete implementation or certification of the system. This report is a description of the acts that have been done. (author)

  14. Forensic applications of physics

    International Nuclear Information System (INIS)

    Martinez, Ernesto N.

    2002-01-01

    Science and the law are considered to be the two main shaping forces in modern societies. The Regional Seminars on Forensic Physics are organized by (mostly CNEA) scientists in Bariloche with a twofold purpose: to increase the participation of researchers as experts witnesses in the solution of legal problems, and to make judges aware of facilities and techniques that might prove useful. Some of the contributions to the last seminar are discussed, ranging from the numerical simulation of mayor explosions to the behavior of snow avalanches, and from the proper control of a trace laboratory to the distribution of words in the plays of Shakespeare. (author)

  15. Validation of finite element code DELFIN by means of the zero power experiences at the nuclear power plant of Atucha I; Convalidacion del codigo DELFIN por medio de las experiencias a potencia cero de la central nuclear Atucha I

    Energy Technology Data Exchange (ETDEWEB)

    Grant, C R [Comision Nacional de Energia Atomica, San Martin (Argentina). Unidad de Actividad Reactores y Centrales Nucleares

    1997-12-31

    Code DELFIN, developed in CNEA, treats the spatial discretization using heterogeneous finite elements, allowing a correct treatment of the continuity of fluxes and currents among elements and a more realistic representation of the hexagonal lattice of the reactor. It can be used for fuel management calculation, Xenon oscillation and spatial kinetics. Using the HUEMUL code for cell calculation (which uses a generalized two dimensional collision probability theory and has the WIMS library incorporated in a data base), the zero power experiences performed in 1974 were calculated. (author). 8 refs., 9 figs., 3 tabs.

  16. The uranium potential of the continental Cretaceous of Patagonia

    International Nuclear Information System (INIS)

    Olsen, H.; Berizzo, J.

    1980-01-01

    The geological features of the fluvial sedimentation of the Cretaceous of Patagonia - the Grupo Chubut Formation in the provinces of Chubut and Santa Cruz, underlined this environment as one of high favourability for discovering uranium deposits. The area has been explored by the CNEA who found two outstanding levels of fluvial sediments that are today the target of further studies to find new deposits. The general geological features are given, together with the results of the exploration up to date, distribution of radiometric anomalies, deposits discovered and an estimation of the uraniferous potential of the Formation. (author)

  17. An Embalse nuclear power plant basic principles simulator

    International Nuclear Information System (INIS)

    Fernandez, Oscar; Galdoz, Erwin; Flury, Celso; Fontanini, Horacio

    1989-01-01

    A nuclear power plant basic principles simulator is a package of programs that numerically solve the dynamic equations of the simulated plant. This kind of tools is mainly used in the first step of training of operational personnel, to allow mental representation of physical phenomena governing the plant. They are also used for students or professional training, and experienced operators can also improve there performance under abnormal operation situations using the simulator. For the Embalse nuclear power plant, mainly the thermohydraulic behaviour, is simulated. The mathematical model was adapted from MANUVR, a code developed at the Electric Systems and Control Department of the National Atomic Energy Commission (CNEA). (Author) [es

  18. Nondestructive analysis for the study of cultural goods

    International Nuclear Information System (INIS)

    Obrutsky, Alba E.

    2009-01-01

    The experience obtained by the laboratories of CNEA in the study of cultural goods, particularly of archaeological, historical and artistic goods, required the development of specific methodologies as they are unique and irreplaceable. When a goods is defined as 'cultural heritage' it has to be studied to verify special features that can not be observed at plain sight, then the application of Non Destructive Assays Method is a useful tool for evaluation, determination of conservation conditions, verification of possible restorations, and to elaborate a general diagnosis of the inspected goods. (author) [es

  19. Non-destructive testing: significant facts

    International Nuclear Information System (INIS)

    Espejo, Hector; Ruch, Marta C.

    2006-01-01

    In the last fifty years different organisations, both public and private, have been assigned to the mission of introducing into the country the most relevant aspects of the modern technological discipline 'Non Destructive Testing' (NDT) through a manifold of activities, such as training and education, research, development, technical assistance and services, personnel qualification/certification and standardisation. A review is given of the significant facts in this process, in which the Argentine Atomic Energy Commission, CNEA, played a leading part, a balance of the accomplishments is made and a forecast of the future of the activity is sketched. (author) [es

  20. Estimations on uranium silicide fuel prototypes for their irradiation and postirradiation

    International Nuclear Information System (INIS)

    Sbaffoni, Maria M.

    2000-01-01

    The 'Silicide' project includes the qualification of this type of research reactor fuel to be used i.e. in the Argentine RA-3 and to confirm CNEA's role as an international supplier. The present paper shows complementary basic information for P-04 prototype post-irradiation, which is already under way, and some parameter values related to the new P-06 prototype to be taken into account for planning its irradiation and post-irradiation. The reliability of these values has been evaluated through comparison with experimental results. The reported results contribute, also, to a parallel study on the nuclear data libraries used in calculations for this type of reactor. (author)

  1. Summary of activities of the Research Branch during 1983

    International Nuclear Information System (INIS)

    1985-11-01

    A summary of the activities performed during 1983 by the C.N.E.A.'s Research Branch in basic and applied research is given. The main activities and achievements obtained are shown in the following areas: 1) Physics Department: Tandar Project; Experimental Nuclear Physics; Theoretical Nuclear Physics; Solid State Physics; Technical Assistance and Engineering. 2) Reactor's Chemistry Department with its divisions: Radiation Chemistry; Chemical Control; Moderator and Coolant Physical Chemistry. 3) Radiobiology Department: Radiation Pathology; Genetics; Molecular Genetics; Somatic Effects; Radiomicrobiology; Irradiation and Dosimetry; Bioterium. 4) Prospective Department and Special Studies; Nuclear Fusion and Solar Energy and also, Biomathematics; Labelled Molecules and Radiochemistry. (M.E.L.) [es

  2. Computer simulation of the behaviour and performance of a CANDU fuel rod

    International Nuclear Information System (INIS)

    Marino, A.C.

    1997-01-01

    At the Argentine Atomic Energy Commission (Comision Nacional de Energia Atomica, CNEA) the BACO code (for 'BArra COmbustible', fuel rod) was developed. It allows the simulation of the thermo-mechanical performance of a cylindrical fuel rod in a Pressurized Heavy Water Reactor (PHWR). The standard present version of the code (2.30), is a powerful tool for a relatively easy and complete evaluation of fuel behaviour predictions. Input parameters and, therefore, output ones may include statistical dispersion. As a demonstration of BACO capabilities we include a review of CANDU fuel applications, and the calculation and a parametric analysis of a characteristic CANDU fuel. (author)

  3. Requirements for the accreditation of a calibration laboratory

    International Nuclear Information System (INIS)

    Palacios, T.A.; Peretti, M.M.

    1993-01-01

    CNEA's activity in calibration is recent but it has a significant development. To assure high quality results, activity must be sustained and improved from day to day. The calibrations laboratory was accredited before Laboratories Qualification Committee, thus adding reliability to its results and making it more competitive when compared to other laboratories not accredited. Among other services given are supervision and follow up of calibrations in laboratories, participation in interlaboratory assays together with other calibration laboratories and assessments on calibration aspects of measuring equipment. (author)

  4. Accreditation experience of radioisotope metrology laboratory of Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Iglicki, A. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina)]. E-mail: iglicki@cae.cnea.gov.ar; Mila, M.I. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina)]. E-mail: mila@cae.cnea.gov.ar; Furnari, J.C. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Arenillas, P. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Cerutti, G. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Carballido, M. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Guillen, V. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Araya, X. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina); Bianchini, R. [Laboratorio de Metrologia de Radioisotopos, Comision Nacional de Energia Atomica (Argentina)

    2006-10-15

    This work presents the experience developed by the Radioisotope Metrology Laboratory (LMR), of the Argentine National Atomic Energy Commission (CNEA), as result of the accreditation process of the Quality System by ISO 17025 Standard. Considering the LMR as a calibration laboratory, services of secondary activity determinations and calibration of activimeters used in Nuclear Medicine were accredited. A peer review of the ({alpha}/{beta})-{gamma} coincidence system was also carried out. This work shows in detail the structure of the quality system, the results of the accrediting audit and gives the number of non-conformities detected and of observations made which have all been resolved.

  5. Accreditation experience of radioisotope metrology laboratory of Argentina

    International Nuclear Information System (INIS)

    Iglicki, A.; Mila, M.I.; Furnari, J.C.; Arenillas, P.; Cerutti, G.; Carballido, M.; Guillen, V.; Araya, X.; Bianchini, R.

    2006-01-01

    This work presents the experience developed by the Radioisotope Metrology Laboratory (LMR), of the Argentine National Atomic Energy Commission (CNEA), as result of the accreditation process of the Quality System by ISO 17025 Standard. Considering the LMR as a calibration laboratory, services of secondary activity determinations and calibration of activimeters used in Nuclear Medicine were accredited. A peer review of the (α/β)-γ coincidence system was also carried out. This work shows in detail the structure of the quality system, the results of the accrediting audit and gives the number of non-conformities detected and of observations made which have all been resolved

  6. Validation of finite element code DELFIN by means of the zero power experiences at the nuclear power plant of Atucha I

    International Nuclear Information System (INIS)

    Grant, C.R.

    1996-01-01

    Code DELFIN, developed in CNEA, treats the spatial discretization using heterogeneous finite elements, allowing a correct treatment of the continuity of fluxes and currents among elements and a more realistic representation of the hexagonal lattice of the reactor. It can be used for fuel management calculation, Xenon oscillation and spatial kinetics. Using the HUEMUL code for cell calculation (which uses a generalized two dimensional collision probability theory and has the WIMS library incorporated in a data base), the zero power experiences performed in 1974 were calculated. (author). 8 refs., 9 figs., 3 tabs

  7. Materials for Molybdenum 99 purification

    International Nuclear Information System (INIS)

    Wilkinson, M. Victoria; Mondino, Angel V.; Manzini, Alberto C.

    2003-01-01

    The National Atomic Energy Commission (CNEA) produces fission Mo 99, an isotope of wide use in nuclear medicine. In order to simplify the current Mo 99 production process, to shorten its duration and reduce impurities in the final product, alternative methods for purification steps were looked for. In this work a variety of new materials for the purification columns were designed, all of them with carbon. These materials were studied and a material which contribute with the best results for molybdenum retention, was selected. The preparation procedure and the working conditions were determined. (author)

  8. Case study - Argentina

    International Nuclear Information System (INIS)

    Diaz, E.

    1986-01-01

    Antecedents and experience of nuclear activities in Argentina; the Atomic Energy Commission (CNEA). First development and research activities. Research reactors and radioisotopes plants. Health physics and safety regulations. - Feasibility studies for the first nuclear power plant. Awarding the first plant CNA I (Atucha I). Relevant data related to the different project stages. Plant performance. - Feasibility study for the second nuclear power plant. Awarding the second plant CNE (Central Nuclear Embalse). Relevant data related to established targets. Differences compared with the first station targets. Local participation. Plant performance. (orig./GL)

  9. Activities for the life management of nuclear power plant in Argentina

    International Nuclear Information System (INIS)

    Chocron, M.; Fabbri, S.; Versaci, R.A.

    2003-01-01

    Since September 1994 the organisation of Argentine nuclear power activities includes the following entities: Argentine Nucleo Electric S.A (NASA) with operates two NPPs (Atucha-1 and Embalse), National Regulatory Board of Nuclear Activities (ARN), National Atomic Energy Commission Commission (CNEA) Within this scheme, one of the main activities undertaken by CNEA is to provide technological assistance to NASA for NPP operation. Works on Life Management of NPPs are included in these activities. In the past, NPP Life Management in Argentina was mainly based on the corrective maintenance concept based on the replacement of damaged part detected during the periodical outages. In recent times, as a consequential of an increasing concern about ageing a Subprogram was created to take care of these subjects. The subprogram, now in the first steps, comprise several tasks: The first task involves the identification of components ageing mechanism and materials likely to age. In the area of mechanical components. a starting point is matrix involving major components such as: Reactor Pressure Vessel, Reactor Internals, Steam Generators, Pressure Tubes, Piping, etc. In this work the apply methodology for the selection of the components will be presented. (Full text)

  10. Status of the reduced enrichment for research reactors program in Argentina

    International Nuclear Information System (INIS)

    Perez, E.; Kohut, C.

    2004-01-01

    In the area of Research and Test Reactors' fuel elements, the different stages of development carried out by the Atomic Energy Commission of Argentina (CNEA) until now, and the future plans are presented in this paper. Own and foreign programs, for reducing the risk of proliferation due the use of high enriched uranium fuel elements in these types of reactors, is mentioned. A brief description of different work performed is presented: At first the experience with the use of highly enriched uranium, and then the activities related with the development done in order to achieve a good knowledge in low-enriched (LEU) fuels, particularly in the area of U308-Al fuels. This experience has permitted us, supported by the excellent results obtained, to be in a position to satisfy our own requirements and also to supply to other countries, not only fuels but also technology transferences and facilities of the development appropriate for this purpose. The main modifications brought in the design and fabrication of these types of fuel elements is also described. Finally, and with the main objective to complete the development and to qualify the LEU fuels based on silicides and to improve the actual MO-99 blanket fabrication technology two new C.N.E.A. projects, are outlined.(author)

  11. Preliminary investigations on the use of uranium silicide targets for fission Mo-99 production

    Energy Technology Data Exchange (ETDEWEB)

    Cols, H.; Cristini, P.; Marques, R.

    1997-08-01

    The National Atomic Energy Commission (CNEA) of Argentine Republic owns and operates an installation for production of molybdenum-99 from fission products since 1985, and, since 1991, covers the whole national demand of this nuclide, carrying out a program of weekly productions, achieving an average activity of 13 terabecquerel per week. At present they are finishing an enlargement of the production plant that will allow an increase in the volume of production to about one hundred of terabecquerel. Irradiation targets are uranium/aluminium alloy with 90% enriched uranium with aluminium cladding. In view of international trends held at present for replacing high enrichment uranium (HEU) for enrichment values lower than 20 % (LEU), since 1990 the authors are in contact with the RERTR program, beginning with tests to adapt their separation process to new irradiation target conditions. Uranium silicide (U{sub 3}Si{sub 2}) was chosen as the testing material, because it has an uranium mass per volume unit, so that it allows to reduce enrichment to a value of 20%. CNEA has the technology for manufacturing miniplates of uranium silicide for their purposes. In this way, equivalent amounts of Molybdenum-99 could be obtained with no substantial changes in target parameters and irradiation conditions established for the current process with Al/U alloy. This paper shows results achieved on the use of this new target.

  12. The projects for heavy water production of the Argentine National Atomic Energy Commission

    International Nuclear Information System (INIS)

    Garcia Bourg, J.M.; Garcia, E.E.

    1982-01-01

    The bases and scope of the projects for heavy water production that are being currently developed by the Argentine National Atomic Energy Commission (CNEA) are described. As an introduction, the following points are presented: a) the fundamentals of heavy water utilization in a nuclear reactor, with a mention of its properties and uses, b) a review of the physicochemical bases of the principal methods for heavy water production: chemical exchange (monothermal and bithermal processes), distillation and electrolysis, with tables summarizing the fundamental characteristics of the first two ones, and an evaluation of the different production methods from the viewpoint of their application in an industrial scale; and c) a synthetic information, in the form of tables, about the world's heavy water production. The subject of heavy water production in Argentina is treated in the principal section, describing the scope, location, main characteristics and chemical processes corresponding to the projects being developed by CNEA, which currently are the installation of an Industrial Plant in Arroyito (Province of Neuquen), purchased on a turnkey basis and using the NH 3 /H 2 isotopic exchange method; the installation of an Experimental Plant in Atucha (Province of Buenos Aires), for the development of the domestic technology of heavy-water production by the SH 2 /H 2 O isotopic exchange method, and the development of the engineering of an industrial plant (''Module 80''), based on the Experimental Plant's technology. (M.E.L.) [es

  13. Characterization and optimization of the RA-3 experimental dosimetry for normal sheep lung radio-tolerance study

    International Nuclear Information System (INIS)

    Soto, M.S.; Gonzalez, S.J.; Thorp, Silvia I.; Pozzi, Emiliano; Gadan, M.; Miller, Marcelo; Farias, R.

    2009-01-01

    In the spirit of the novel technique proposed by the University of Pavia group (Italy) to irradiate an isolated organ using BNCT, the Comision Nacional de Energia Atomica (CNEA) in collaboration with the Fundacion Favaloro has initiated a project that aims to investigate the feasibility of BNCT for ex-situ treatment of diffuse metastatic disease in the lungs. The present work was carried out in the framework of the undergoing experimental study of the radio tolerance of normal sheep lung. With the purpose of characterizing and optimizing the resulting experimental dosimetry in normal lung subjected to neutron irradiation in the BNCT facility of the RA-3 reactor (CNEA), we have performed a series of experiments to find the optimum configuration of the container-lung system deriving a dose distribution preferentially uniform throughout the organ. Once the optimal set-up was established, we measured the total gamma dose rate and estimated the irradiation time compatible with the maximum tolerable dose of normal lung resulting from previous studies in rats. This estimation was performed using RBE, CBE and tolerance dose values derived from radiobiological studies with BNCT. In parallel with the experimental characterization, we built two different computational models of the container-lung system to perform Monte Carlo simulation with MCNP and Treatment Planning System NCTPlan. (author)

  14. Life Management and Safety of Nuclear Facilities

    Energy Technology Data Exchange (ETDEWEB)

    Fabbri, S.; Diluch, A.; Vega, G., E-mail: fabbri@cnea.gov.ar [Comisión Nacional de Energía Atómica, Buenos Aires (Argentina)

    2014-10-15

    The nuclear programme in Argentina includes: nuclear power and related supplies, medical and industrial applications, waste management, research and development and human training. Nuclear facilities require life management programs that allow a safe operation. Safety is the first priority for designers and operators. This can be attained with defence in depth: regular inspections and maintenance procedures to minimize failure risks. CNEA objectives in this area are to possess the necessary capability to give safe and fast technical support. Within this scheme, one of the main activities undertaken by CNEA is to provide technological assistance to the nuclear plants and research reactors. As a consequence of an increasing concern about safety and ageing a Life Management Department for safe operation was created to take care of these subjects. The goal is to elaborate a Safety Evaluation Process for the critical components of nuclear plants and other facilities. The overall objectives of a safety process are to ensure a continuous safe, reliable and effective operation of nuclear facilities and it means the implementation of the defence in deep concept to enhance safety for the protection of the public, the workers and the environment. (author)

  15. Integrated ageing management of Atucha NPP

    International Nuclear Information System (INIS)

    Ranalli, Juan M.; Marchena, Martin H.; Zorrilla, Jorge R.; Antonaccio, Elvio E.; Brenna, Pablo; Yllanez, Daniela; Cruz, Gerardo Vera de la; Luraschi, Carlos; Sabransky, Mario

    2013-01-01

    Atucha NPP is a two PHWR unit site located in Lima, Province of Buenos Aires, 120 km north of Buenos Aires, Argentina. Until recent, the site was split in Atucha I NPP, a 350 MW pressure vessel heavy water reactor in operation since 1974; and Atucha II, a similar design reactor, twice as big as Atucha I finishing a delayed construction. With the start-up of Atucha II and aiming to integrate the management of the plants, the Utility (Nucleolectrica Argentina Sociedad Anonima - NASA) has reorganized its operation units. Within this reorganization, an Ageing Management Department has been created to cope with all ageing issues of both Atucha I and II units. The Atomic Energy Commission of Argentina (Comision Nacional de Energia Atomica - CNEA) is a state-owned R and D organization that; among other functions such as designing and building research reactors, developing uranium mining and supplying radioisotopes to the medical market; is in charge of providing support and technological update to all Argentinean NPPs. The Ageing Management Department of Atucha NPP and the Ageing Management Division of CNEA has formed a joint working group in order to set up an Integrated Ageing Management Program for Atucha NPP following IAEA guidelines. In the present work a summary of the activities, documental structure and first outputs of the Integrated Ageing Management Program of Atucha NPP is presented. (author)

  16. Integrated Ageing Management of Atucha NPP

    International Nuclear Information System (INIS)

    Ranalli, J.M.; Marchena, M.H.; Zorrilla, J.R.; Sabransky, M.

    2012-01-01

    Atucha NPP is a two PHWR unit site located in Lima, Province of Buenos Aires, 120 km north of Buenos Aires, Argentina. Until recent, the site was split in Atucha I NPP, a 350 MW pressure vessel heavy water reactor in operation since 1974; and Atucha II, a similar design reactor twice as big as Atucha I finishing a delayed construction . With the start-up of Atucha II and aiming to integrate the management of the plants, the Utility (Nucleolectrica Argentina Sociedad Anonima - NASA) has reorganized its operation units. Within this reorganization, an Ageing Management Department has been created to cope with all ageing issues of both Atucha I and II units. The Atomic Energy Commission of Argentina (Comision Nacional de Energia Atomica - CNEA) is a state-owned R and D organization that; among other functions such as designing and building research reactors, developing uranium mining and supplying radioisotopes to the medical market; is in charge of providing support and technological update to all Argentinean NPPs. The Ageing Management Department of Atucha NPP and the Ageing Management Division of CNEA has formed a joint working group in order to set up an Integrated Ageing Management Program for Atucha NPP following IAEA guidelines. In the present work a summary of the activities, documental structure and first outputs of the Integrated Ageing Management Program of Atucha NPP is presented. (author)

  17. Basic and detail engineering development of PTAMB

    International Nuclear Information System (INIS)

    Beuter, Oscar; Reibel, Jose A.; Mirad, Andres E.; Furriel, Miguel; Diaz, L.

    2009-01-01

    The purpose of the future Treatment and Conditioning of Medium and Low Activity Solid and Liquid Waste Plant (PTAMB) of the National Atomic Energy Commission (CNEA) will be to put up medium and low activity solid and liquid waste and to verify the quality of the conditioned waste generated in Ezeiza Atomic Center (CAE), Constituyentes Atomic Center (CAC) and other national producers outside CNEA. The PTAMB is a Class I Radioactive Installation (according to Basic Standard AR 10.1.1, Rev. 3 RNA, paragraphs 17 and 22) also called Relevant Installation. The aim of this document is to list the steps that carried out the Projects Department of the National Program of Radioactive Waste Management (PNGRR) to arrive to the realization of the detailed engineering of the plant. The project is in Public Tender stage and the beginning of the construction would be March 2010. Once built, the Plant will process the radioactive waste contained in the conceptual engineering, offering more precise control of these and their compatibility with the new final disposal systems to build. (author)

  18. Safety analysis of an irradiation device for 99Mo production in RA-3 reactor

    International Nuclear Information System (INIS)

    Lerner, Ana Maria; Madariaga, Marcelo; Waldman, Ricardo

    2000-01-01

    The Argentine RA-3 research reactor (5 MW) has been converted to LEU fuel more than nine years ago. Since then, it has been operating with LEU fuel, which has been designed and fabricated at the National Atomic Energy Commission (CNEA). The Nuclear Regulatory Authority (ARN) is the institution in charge of the installation safety control. It is under this framework that the ARN has elaborated a neutronic calculation model for the RA-3 core, paying special attention to the device presently used for the irradiation of (HEU) 235 U targets required to obtain 9 '9Mo as a fission product. A regulatory analysis of results is carried out in the framework of ARN standards for fixed experiments. For such purpose, calculated reactivity values associated with such device are compared with recently measured values at the installation. Finally, and according to guidelines established in the first part of this work, a calculation model for a new device proposed by CNEA for the irradiation of metallic (LEU) uranium targets and still at its design stage, is here analysed. (author)

  19. High level radioactive wastes: Considerations on final disposal

    International Nuclear Information System (INIS)

    Ciallella, Norberto R.

    2000-01-01

    When at the beginnings of the decade of the 80 the National Commission on Atomic Energy (CNEA) in Argentina decided to study the destination of the high level radioactive wastes, was began many investigations, analysis and multidisciplinary evaluations that be origin to a study of characteristics never before carried out in Argentina. For the first time in the country was faced the study of an environmental eventual problem, several decades before that the problem was presented. The elimination of the high level radioactive wastes in the technological aspects was taken in advance, avoiding to transfer the problems to the future generations. The decision was based, not only in technical evaluations but also in ethical premises, since it was considered that the future generations may enjoy the benefits of the nuclear energy and not should be solve the problem. The CNEA in Argentina in 1980 decided to begin a feasibility study and preliminary engineering project for the construction of the final disposal of high level radioactive wastes

  20. Integrated ageing management of Atucha NPP

    Energy Technology Data Exchange (ETDEWEB)

    Ranalli, Juan M.; Marchena, Martin H.; Zorrilla, Jorge R.; Antonaccio, Elvio E.; Brenna, Pablo; Yllanez, Daniela; Cruz, Gerardo Vera de la; Luraschi, Carlos, E-mail: ranalli@cnea.gov.ar [Gerencia Coordinacion Proyectos CNEA-NASA, Comision Nacional de Energia Atomica, Buenos Aires (Argentina); Sabransky, Mario, E-mail: msabransky@na-sa.com.ar [Departamento Gestion de Envejecimiento, Central Nuclear Atucha I-II Nucleoelectrica Argentina S.A., Provincia de Buenos Aires (Argentina)

    2013-07-01

    Atucha NPP is a two PHWR unit site located in Lima, Province of Buenos Aires, 120 km north of Buenos Aires, Argentina. Until recent, the site was split in Atucha I NPP, a 350 MW pressure vessel heavy water reactor in operation since 1974; and Atucha II, a similar design reactor, twice as big as Atucha I finishing a delayed construction. With the start-up of Atucha II and aiming to integrate the management of the plants, the Utility (Nucleolectrica Argentina Sociedad Anonima - NASA) has reorganized its operation units. Within this reorganization, an Ageing Management Department has been created to cope with all ageing issues of both Atucha I and II units. The Atomic Energy Commission of Argentina (Comision Nacional de Energia Atomica - CNEA) is a state-owned R and D organization that; among other functions such as designing and building research reactors, developing uranium mining and supplying radioisotopes to the medical market; is in charge of providing support and technological update to all Argentinean NPPs. The Ageing Management Department of Atucha NPP and the Ageing Management Division of CNEA has formed a joint working group in order to set up an Integrated Ageing Management Program for Atucha NPP following IAEA guidelines. In the present work a summary of the activities, documental structure and first outputs of the Integrated Ageing Management Program of Atucha NPP is presented. (author)

  1. Argentina: Brief Overview of Argentina’s INIS Activities

    International Nuclear Information System (INIS)

    Bavio, Mercedes

    2015-01-01

    Argentina works in close collaboration with the IAEA on its technical cooperation program, both on national projects within their national program plan, including its thematic areas, as well as on regional projects through the ARCAL agreement. In the field of horizontal cooperation, Argentina engages in technology transfer, training fellows and receiving scientific visits. Argentina has been a member of the International Nuclear Information System (INIS) since 1970, and was among the first IAEA Member States to agree to participate in the system. As a member, we have been involved in the various activities carried out by the IAEA, disseminating the research and development of our researchers and scientists in nuclear and related subjects and promoting INIS activities. The National Atomic Energy Commission (CNEA) is the INIS National Center. Contributions to the INIS database nationwide are made through the CNEA's Information Centers: Eduardo Savino Information Center (CIES, Constituyentes Atomic Center), Leo Falicov Library (Bariloche Atomic Center) and the Library of the Nuclear Regulatory Authority (ARN)

  2. Process variables in the obtention of U-Mo powder by the hydriding-milling-dehydriding method (HMD process)

    International Nuclear Information System (INIS)

    Pasqualini, Enrique E.; Helzel Garcia, Javier; Lopez, Marisol

    2003-01-01

    In the next few years nuclear fuels based on uranium oxides, aluminides and silicides for MTR reactors will be replaced by the high density alloy uranium- 7% (w/w) molybdenum (U-7 Mo). Actually there is only one commercial supplier of this raw material that has to be provided as powder containing 20% enriched uranium ( 235 U). In the Nuclear Fuels Department of the National Atomic Energy Commission (CNEA) at Buenos Aires was developed an alternative way of producing U-7 Mo powder in a production scale. Meanwhile CNEA is participating in the International Program (RERTR) for final qualification of this nuclear material. This new method of production consists in the hydriding of the alloy, milling the hydride to final size and dehydriding the powder. These results were achieved because a special technique was discovered for the massive hydriding of the U-7 Mo alloy. The production method is simple, requires conventional equipment and low investment. Argentine can have important comparative advantages for its production and exportation. A scale production plant is being planed. (author)

  3. Studies of Vitrification of Ion-Exchange Resins. A Joint USA-Argentina Collaborative Work

    International Nuclear Information System (INIS)

    Hutson, N.D.; Herman, C.A.; Zamecnik, J.R.; Sundaram, S.K.; Perez, J.M.; Hoeffner, S.L.; Russo, D.O.; Sterba, M.

    2003-01-01

    Under the Science and Technology Implementing Arrangement for Cooperation on Radioactive and Mixed Waste Management (JCCRM), the U.S.Department of Energy (DOE) is helping to transfer waste treatment technology to international atomic energy commissions.As part of the JCCRM, DOE has established a collaborative research agreement with the Comision Nacional de Energia Atomica (Cnea).The Cnea is investigating treatment and disposal options for organic ion exchange resins currently stored at two nuclear power plants in the Republic of Argentina.The major hazards of the ion exchange resins are their organic composition and the contaminants that are present on the resins after purification processes.The principal contaminants are usually the radioactive species that are removed.For these studies, actual non-radioactive resins from Argentina's Embalse and Atucha plants were tested.The glass produced during the runs was durable was measured by the Product Consistency Test (PCT).The product had a predictable, mostly amorphous composition throughout the demonstrations; though there was some evidence of the formation of clinopyroxene crystals.The immobilized product represented an approximately 70% volume reduction from the simulated Argentine ion exchange resin (i.e., a reduction from the volume of as-stored wet resin to the volume of the ultimate borosilicate glass product).For all runs, the radioactive surrogate retention was near 100%

  4. Young students's opinion about atomic energy

    International Nuclear Information System (INIS)

    Barroso, Belen; Martin, Hugo R.

    2006-01-01

    The present research work was performed in answer to a requirement that the CNEA-RC made to students of the Public and Institutional Relations Degree of the UES21, as a part of activities carried out in the framework of the Academic Cooperation Agreement between both institutions. In this case the students had to attend the Professional Practical course during the first semester of 2006, which included a short period in some company or organization. The Degree of Knowledge and the Opinion of the students from the Cycle of Specialization of the Province of Cordoba Educational System (ages between 15 and 17 years old), on the activities that are made in the site of CNEA-RC and DIOXITEK SA at Alta Cordoba neighborhood in Cordoba city has been analyzed. The same aspects were analyzed for Dioxitek's activities (equipment, raw materials, risk performance, etc.). Although the activities made at CNEA-RC involved during 2005/6 about 4000 students, due to the short time available for the practical part only the data of two schools located near the facilities were processed. Three aspects of the space conformed between the public and the general opinion were analyzed: the customs, the stereotypes and the attitudes of the people. These aspects were taken as the characteristics to describe to the opinions, their direction and intensity. The analysis was based on an exploratory investigation of type, characterized by its flexibility. The field work was of quantitative character. The surveys were structured with closed questions (categories of answers delimited previously on which the students must answer). For its design we used diverse sources of intelligence, such as pages of Internet, pamphlets, magazines, annual balances of the organizations, etc. The main results were the following: 1) The greater percentage of students declared to have little information on Atomic Energy. Only 4% declared to have abundant knowledge on the subject. 2) A 38% of the students indicated that

  5. Projection of energy demand for the period 2004-2035 in Argentina using the model 'MAED'

    International Nuclear Information System (INIS)

    Jensen Mariani, Santiago N.; Cañadas, Valeria

    2009-01-01

    The tool used in CNEA to study projection of energy demand in Argentina, is the Model for Energy Demand Analysis 'MAED', supplied by the International Atomic Energy Agency (IAEA), launched by the project 'Strengthening capacity to develop sustainable energy systems' RLA/0/029, organized by that agency and OLADE. This is resumed by the Prospective and Energy Planning Division, as a comprehensive analysis of the energy chain in the country, conducted over many years in the CNEA and that was reduced at just supply analysis in recent years. For the modeling of the national energy demand, there were found a series of assumptions about population growth, changes in the economy and other variables, in order to determine the final energy demand for the study period 2004 -2035; in a total of three scenarios will be detailed in the relevant sections. As shown, the results reveal the high dependence on fossil fuels, even in a scenario with efficient energy use, and as in this context, an increasing involvement of nuclear energy in the energy matrix could offset this dependence by diversifying and strengthening the supply of electricity. (author)

  6. National supply of reactivity control rods for Embalse nuclear power plant (CNE)

    International Nuclear Information System (INIS)

    Biondo, C.D.; Carloni, J.G.; Aba, J.A.

    1987-01-01

    The manufacture and supply on industrial scale of reactivity control rods for CNE (Embalse nuclear power plant) were developed by the National Atomic Energy Commission (CNEA) together with the private industry, as part of a program aimed to the substitution of imported supplies used in the operation of power plants by materials manufactured in Argentina. So far, the control rods were imported from Canada. In this work, the different development stages performed by CNEA and CONUAR S.A. are described, leading to the supply of a set of 21 cobalt rods to be included in a reactor of CNE in order to qualify this component. Among the main activities performed, the following stand out: specifications development, particularly those concerning to cobalt cores, evaluation of design documentation and elaboration of bidding conditions and a plan of manufacture and control. According to the results obtained during the service and the post-irradiation measurements, the design will be reviewed in order to undertake new manufacturing plans. (Author)

  7. Professional practices: a short introduction of national nuclear activities to university students

    International Nuclear Information System (INIS)

    Martin, Hugo R.

    2005-01-01

    This paper is a continuation of precedents annual works presented in AATN Meetings, informing about activities of Institutional Affairs Sector of Central Region delegation of National Atomic Energy Commission (CNEA-RC). Regular activities in Cordoba city, have been carried out during half a century in urban zone of Cordoba City. Activities show a long misunderstanding and confrontations with the provincial and municipal authorities, and with the neighbors and environmentalist antinuclear organizations. The experience indicates that the people demands for the protection of health or environment, and sometimes the claiming for closing some facilities, have been directly related with what people really know about the activities in the site. The common denominator that one observes in the conflicts of the past, is the high degree of ignorance on the part of the citizenship on the activities that are carried out in the place. This is valid for the neighbors, the competent authorities and even for Cordoba's university, scientific and technical qualified community. Starting from the recognition of the responsibility that has the institution of informing the population appropriately on what is carried out in their facilities, the CNEA-RC had developed an institutional process of Professional Practices of university students which is described in this paper. The experience of two years, has shown that results are positive because the university community (teachers, students and researchers) knows now the real status of national nuclear activities. (author) [es

  8. Radioisotope measurement system; Sistema de medicion de radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Villanueva Ruibal, Jose [Comision Nacional de Energia Atomica, Ezeiza (Argentina).Centro Atomico Ezeiza

    2007-07-01

    A radioisotope measurement system installed at L.M.R. (Ezeiza Atomic Center of CNEA) allows the measurement of nuclear activity from a wide range of radioisotopes. It permits to characterize a broad range of radioisotopes at several activity levels. The measurement hardware as well as the driving software have been developed and constructed at the Dept. of Instrumentation and Control. The work outlines the system's conformation and its operating concept, describes design characteristics, construction and the error treatment, comments assay results and supplies use advices. Measuring tests carried out employing different radionuclides confirmed the system performing satisfactorily and with friendly operation. (author) [Spanish] Un sistema de instrumentacion instalado en el L.M.R. (Centro Atomico Ezeiza de la CNEA) mide en amplio rango la actividad del decaimiento nuclear de radioisotopos. Permite caracterizar una amplia gama de radioistopos de variados niveles de actividad. Tanto el hardware de medicion como el software de operacion han sido desarrollados y construidos en el Dept. Instrumentacion y Control. El trabajo esboza la conformacion del sistema y su concepto de operacion, describe caracteristicas de disenio, construccion y del tratamiento del error, comenta resultados de ensayos y provee recomendaciones de uso. Pruebas de medicion realizadas empleando diversos nucleidos comprobaron que el sistema funciona en forma satisfactoria y su operacion es amigable. (autor)

  9. Rhodium self-powered neutron detector as a suitable on-line thermal neutron flux monitor in BNCT treatments.

    Science.gov (United States)

    Miller, Marcelo E; Sztejnberg, Manuel L; González, Sara J; Thorp, Silvia I; Longhino, Juan M; Estryk, Guillermo

    2011-12-01

    A rhodium self-powered neutron detector (Rh SPND) has been specifically developed by the Comisión Nacional de Energía Atómica (CNEA) of Argentina to measure locally and in real time thermal neutron fluxes in patients treated with boron neutron capture therapy (BNCT). In this work, the thermal and epithermal neutron response of the Rh SPND was evaluated by studying the detector response to two different reactor spectra. In addition, during clinical trials of the BNCT Project of the CNEA, on-line neutron flux measurements using the specially designed detector were assessed. The first calibration of the detector was done with the well-thermalized neutron spectrum of the CNEA RA-3 reactor thermal column. For this purpose, the reactor spectrum was approximated by a Maxwell-Boltzmann distribution in the thermal energy range. The second calibration was done at different positions along the central axis of a water-filled cylindrical phantom, placed in the mixed thermal-epithermal neutron beam of CNEA RA-6 reactor. In this latter case, the RA-6 neutron spectrum had been well characterized by both calculation and measurement, and it presented some marked differences with the ideal spectrum considered for SPND calibrations at RA-3. In addition, the RA-6 neutron spectrum varied with depth in the water phantom and thus the percentage of the epithermal contribution to the total neutron flux changed at each measurement location. Local (one point-position) and global (several points-positions) and thermal and mixed-field thermal neutron sensitivities were determined from these measurements. Thermal neutron flux was also measured during BNCT clinical trials within the irradiation fields incident on the patients. In order to achieve this, the detector was placed on patient's skin at dosimetric reference points for each one of the fields. System stability was adequate for this kind of measurement. Local mixed-field thermal neutron sensitivities and global thermal and mixed

  10. Rhodium self-powered neutron detector as a suitable on-line thermal neutron flux monitor in BNCT treatments

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Marcelo E.; Sztejnberg, Manuel L.; Gonzalez, Sara J.; Thorp, Silvia I.; Longhino, Juan M.; Estryk, Guillermo [Comision Nacional de Energia Atomica, Av. del Libertador 8250, Ciudad de Buenos Aires 1429 (Argentina); Comision Nacional de Energia Atomica, Av. del Libertador 8250, Ciudad de Buenos Aires 1429, Argentina and CONICET, Av. Rivadavia 1917, Ciudad de Buenos Aires 1033 (Argentina); Comision Nacional de Energia Atomica, Av. del Libertador 8250, Ciudad de Buenos Aires 1429 (Argentina)

    2011-12-15

    Purpose: A rhodium self-powered neutron detector (Rh SPND) has been specifically developed by the Comision Nacional de Energia Atomica (CNEA) of Argentina to measure locally and in real time thermal neutron fluxes in patients treated with boron neutron capture therapy (BNCT). In this work, the thermal and epithermal neutron response of the Rh SPND was evaluated by studying the detector response to two different reactor spectra. In addition, during clinical trials of the BNCT Project of the CNEA, on-line neutron flux measurements using the specially designed detector were assessed. Methods: The first calibration of the detector was done with the well-thermalized neutron spectrum of the CNEA RA-3 reactor thermal column. For this purpose, the reactor spectrum was approximated by a Maxwell-Boltzmann distribution in the thermal energy range. The second calibration was done at different positions along the central axis of a water-filled cylindrical phantom, placed in the mixed thermal-epithermal neutron beam of CNEA RA-6 reactor. In this latter case, the RA-6 neutron spectrum had been well characterized by both calculation and measurement, and it presented some marked differences with the ideal spectrum considered for SPND calibrations at RA-3. In addition, the RA-6 neutron spectrum varied with depth in the water phantom and thus the percentage of the epithermal contribution to the total neutron flux changed at each measurement location. Local (one point-position) and global (several points-positions) and thermal and mixed-field thermal neutron sensitivities were determined from these measurements. Thermal neutron flux was also measured during BNCT clinical trials within the irradiation fields incident on the patients. In order to achieve this, the detector was placed on patient's skin at dosimetric reference points for each one of the fields. System stability was adequate for this kind of measurement. Results: Local mixed-field thermal neutron sensitivities and

  11. Rhodium self-powered neutron detector as a suitable on-line thermal neutron flux monitor in BNCT treatments

    International Nuclear Information System (INIS)

    Miller, Marcelo E.; Sztejnberg, Manuel L.; Gonzalez, Sara J.; Thorp, Silvia I.; Longhino, Juan M.; Estryk, Guillermo

    2011-01-01

    Purpose: A rhodium self-powered neutron detector (Rh SPND) has been specifically developed by the Comision Nacional de Energia Atomica (CNEA) of Argentina to measure locally and in real time thermal neutron fluxes in patients treated with boron neutron capture therapy (BNCT). In this work, the thermal and epithermal neutron response of the Rh SPND was evaluated by studying the detector response to two different reactor spectra. In addition, during clinical trials of the BNCT Project of the CNEA, on-line neutron flux measurements using the specially designed detector were assessed. Methods: The first calibration of the detector was done with the well-thermalized neutron spectrum of the CNEA RA-3 reactor thermal column. For this purpose, the reactor spectrum was approximated by a Maxwell-Boltzmann distribution in the thermal energy range. The second calibration was done at different positions along the central axis of a water-filled cylindrical phantom, placed in the mixed thermal-epithermal neutron beam of CNEA RA-6 reactor. In this latter case, the RA-6 neutron spectrum had been well characterized by both calculation and measurement, and it presented some marked differences with the ideal spectrum considered for SPND calibrations at RA-3. In addition, the RA-6 neutron spectrum varied with depth in the water phantom and thus the percentage of the epithermal contribution to the total neutron flux changed at each measurement location. Local (one point-position) and global (several points-positions) and thermal and mixed-field thermal neutron sensitivities were determined from these measurements. Thermal neutron flux was also measured during BNCT clinical trials within the irradiation fields incident on the patients. In order to achieve this, the detector was placed on patient's skin at dosimetric reference points for each one of the fields. System stability was adequate for this kind of measurement. Results: Local mixed-field thermal neutron sensitivities and global

  12. Aportes comunicacionales para un debate sobre ciudadanía y migra Communicational contributions to a debate on citizenship and migration

    Directory of Open Access Journals (Sweden)

    Gerardo Halpern

    2012-12-01

    Full Text Available En este trabajo se presenta un conjunto de elementos descriptivos e interpretativos acerca de la experiencia de Ápe Paraguay, un proyecto político - comunicacional que, desde 2008, realiza un grupo de migrantes paraguayos en Argentina y en Paraguay y que, progresivamente ha crecido en cantidad de miembros de otros lugares del mundo. La declaración de su propuesta política, el contenido de su página Web, así como su producción radial en Internet y otras iniciativas enmarcadas en la utilización de tecnologías de la información y la comunicación y por fuera de ellas, nos han llevado a postular una serie de inquietudes acerca de las formas de producción de ciudadanía en la actualidad, así como de la politicidad de los migrantes paraguayos organizados en distintos lugares del planeta. Estas inquietudes nos permiten vincular aspectos organizativos de los migrantes paraguayos contemporáneos, la producción y reivindicación de identidades emergentes y la utilización de medios de comunicación como forma de construcción de sujetos legítimos allí donde la historia del Paraguay ha producido lejanía y castigo. En definitiva, tratamos de recuperar, desde algunos aportes de la Antropología Cultural y del campo de las Ciencias de la Comunicación, ciertas iniciativas de producción de ciudadanía que ponen en evidencia tanto las conflictividades inherentes a los procesos migratorios y como la lucha comunicacional de los migrantes en su reclamo por el acceso a derechos.This paper presents a set of descriptions and interpretations ofthe Ápe Paraguay experience, a political-communicational project carried outin Argentina and Paraguay by a group of Paraguayan migrants since 2008 which has gradually grown due to the inclusion of members from other parts of the world. It is their political statement, their website content and also their Internet radio broadcasting and other initiatives using and not using information and communication

  13. Terror y violencia durante la Guerra del Paraguay: ‘La masacre de 1869’ y las familias de Concepción

    Directory of Open Access Journals (Sweden)

    Nidia R. Areces

    2006-10-01

    Full Text Available Abstract: Terror and violence during the Paraguayan War:  ‘La masacre de 1869’ and the families of ConcepciónThis paper addresses the massacre that took place  in the District of Concepción between April and  May 1869, one of many ordered by Marshal Francisco S. López during the last months of the Paraguayan War. The object here is to interpret the  killings and other extreme measures carried out in  the context of a conflict without mercy. Such  measures interrupted the state of law and opened  the way for arbitrary and unjust acts and the demonstration of the abusive power of a leader who  exercised unscrupulous violence. The explanations, in one way or another, would seem to conclude that his behaviour was irrational. However,  the paper aims to understand the different forms  of rationality that produced the outbreaks of violence. It intends to reveal a fiercer and more complex history from the treatment, on a local scale,  of a universal issue: ‘the violence of war’.Resumen:El artículo aborda la masacre llevada a cabo en el Departamento de Concepción entre los meses de  abril y mayo de 1869, una de las tantas que ordenó el Mariscal Francisco S. López durante los  últimos meses de la Guerra del Paraguay. El objetivo es interpretar las matanzas y otras medidas  extremas implementadas en el marco de una contienda sin cuartel. Con ellas se rompió el estado  de derecho, se abrió el cauce a las arbitrariedades  y a las injusticias y a la demostración del abusivo  poderío de un gobernante del cual emanaba una  violencia ejercida sin escrúpulos. Pareciera que  las explicaciones, de una manera u otra, concluyen en lo irracional de su conducta. Sin embargo, lo que se trata de comprender son las formas de  racionalidad que hacen brotar la violencia. La  intención es develar una historia más encarnada y  compleja a partir del tratamiento, en una escala  local, de un tema universal: ‘la violencia de la

  14. El reclamo territorial Ayoreo Totobiegosode

    Directory of Open Access Journals (Sweden)

    Gladys Margarita Casaccia

    2009-07-01

    Full Text Available El proceso jurídico-administrativo abierto en 1993 ante los poderes del Estado Paraguayo para la reivindicación de una parte del territorio de los Totobiegosode, grupo local del pueblo Ayoreo, es experiencia singular en el país. En el proceso, los instrumentos jurídicos que garantizan derechos de los pueblos indígenas están sometidos a prueba no sólo en lo relativo a la coherencia de sus postulados, disposiciones y procedimientos, sino también en función a las constricciones del contexto socio-político. El trabajo expone el abordaje interdisciplinario de la gestión conjunta entre los Ayoreo Totobiegosode y profesionales no indígenas, como las distintas dimensiones administradas en la reivindicación territorial: étnica, ambiental, patrimonial cultural y de derechos humanos. La existencia de sub-grupos Totobiegosode sin contacto con la sociedad envolvente, y la transformación acelerada de la región del Chaco Paraguayo, son condiciones particulares de los trámites aún en curso.The legal-administrative process started in 1993 before the Paraguayan governmental powers to claim part of the land of the Totobiegosode, an indigenous local group of the Ayoreo people, is a unique experience in the country. In the process, the legal instruments that guarantee the rights of the indigenous people are not only tested with regards to the coherence of its principles, regulations and procedures, but also with regards to the constraints of the socio-political context. This paper explains the interdisciplinary approach of joint management between the Ayoreo Totobiegosode and non-indigenous team of professionals, such as the different aspects managed during the land claims: ethnic, environmental, cultural heritage and human rights. The existence of sub-groups of Totobiegosode without contact with the surrounding society, currently called "in isolation", and the accelerated transformation of the Paraguayan Chaco region, are particular conditions of

  15. Actitudes lingüísticas en Paraguay. Identidad lingüística de los hablantes de lengua materna castellana en Asunción

    Directory of Open Access Journals (Sweden)

    Ana Beatriz Chiquito

    2014-11-01

    Full Text Available Resumen Este artículo analiza las actitudes lingüísticas de hablantes nativos de español de la Ciudad de Asunción, hacia el español del Paraguay y el de los otros países hispanohablantes. El artículo hace parte de los resultados del Proyecto LIAS (Linguistic Identity and Attitudes in Spanish-speaking Latin America, financiado por El Consejo Noruego de Investigación (RCN. La recolección de los datos se realizó en la capital del país, entrevistando a una muestra de 400 informantes estratificada con las variables de edad, sexo y nivel socioeconómico. El artículo resalta la particularidad del bilingüismo del país y la situación de diglosia entre el guaraní y el castellano; el mayor prestigio del castellano de Asunción frente al habla de las ciudades fronterizas con Brasil y Argentina, en las cuales se hablan el portugués brasileño, el guaraní y el español argentino, además del español paraguayo. Los resultados del estudio confirman el prestigio del castellano, cuyo papel oficial se mantiene, a pesar del creciente prestigio del guaraní, impulsado por las nuevas leyes de educación bilingüe y el establecimiento de la Academia de la Lengua Guaraní. Abstract This article analyzes the linguistic attitudes of native Spanish speakers of Asunción, towards Spanish spoken in Paraguay and in the other Spanish-speaking countries. It is a result of the LIAS-Project (Linguistic Identity and Attitudes in Spanish-speaking Latin America, funded by The Research Council of Norway (RCN. The data were gathered in the capital of the country, interviewing a stratified sample of 400 respondents, based on the variables of age, sex and socioeconomic status. The article highlights the special situation of bilingualism in the country and the diglosic relationship between Guarani and Spanish; the higher prestige of the Spanish variety spoken in Asunción, compared to the ones spoken in the Paraguayan cities on the border with Brazil and Argentina

  16. Public communication on times of environmental crisis. The opening of San Rafael 's uranium complex

    International Nuclear Information System (INIS)

    Calvino, Carlos; Cisneros, Martin

    2008-01-01

    Full text: Argentina has had a lot of cultural changes in the last few years. An environmental movement has gathered and is trying to stop the opening of the Sierra Pintada uranium complex, near the city of San Rafael, in the south of Mendoza province. Since 2005, several 'groundless information' have been published in the local media about the dangers of this re-opening. These news exaggerate the properties of radon gas, claiming that it will reach San Rafael city (20 miles from the complex), rising radiological risk among the population, etc. This scene shows a 'non-real' picture of the regulatory activities that the Nuclear Regulatory Authority (ARN), a government agency that regulates nuclear facilities in Argentina, is really and systematically accomplishing. In this situation, the board of Directors of ARN decided to entrust a full analysis of the environmental issue in the area. The Office of Press and Communication implemented a local communication plan, using a Strategic and Systemic tool kit. The period to be analyzed is from second semester 2005 to February 2007. A little bit of history: the San Rafael Complex started in September 20 of 1979. It belongs to the National Commission of Atomic Energy (CNEA), a government agency. Until its temporary suspension in 1995 for international market reasons (uranium price was U$S 10 / pound), almost 2 million tons of uranium were processed. Besides its temporary suspension, the ARN has been constantly monitoring this particular former complex. In the year 2001, CNEA notices that the uranium price starts to rise and entrust National Technology University, Avellaneda Branch, to accomplish an Environmental Impact Report, according to the argentine law 25.585. Due especially to the rising of uranium price, (actually, the uranium price is approximately U$S 200) the national government determined to restart the extraction of the mineral again. By the year 2004, with the results of the Environmental Impact report, CNEA

  17. On-line distance assisted training program for nuclear medicine technologists applied to SPECT-CT and PET-CT (Program DAT-OL). Results of a first course in Argentina

    International Nuclear Information System (INIS)

    Furnari, J C; Notari, C; Daoud, A; Giannone, C A

    2012-01-01

    The CNEA and the IDB are running for the second time the Distance Assisted Training course (DAT-OL), which is part of a global program of the International Atomic Energy Agency (IAEA) for Nuclear Medicine technologists working in centers equipped with PET CT and / or SPECT-CT hybrids. Aims: Completion of this course is justified by the strong increase in the installation of hybrid nuclear medicine (NM) systems, the increasing demand for qualified technicians and the lack of formal training opportunity. The course objective is to both promote the qualification of the technologist as improving quality and operational safety in MN participating centers. Material and Methods: This new course is free and is taught in Spanish from the www.datnmt.org website. The study material is available on site and the training is aided by tutors of institutions as CNEA, FUESMEN (School of Nuclear Medicine Foundation), UBA (University of Buenos Aires) and Nuclear Medicine private labs. The DAT-OL is developed in modules: Physics of SPECT / CT and PET / CT; Principles and sectional anatomy CT, SPECT / CT and PET / CT clinical; cyclotron and radiopharmaceutical production; Radiation Safety in PET / CT; Workflows and protocols with PET / CT, clinical reports: normal variants, artifacts and failures. Some of the requirements to take the DAT-OL are: Access to camera PET / CT and / or camera SPECT / CT, and a supervisor (Nuclear Medicine physician or Medical physicist) at the center of NM where the student works. Technicians must have academic qualification, 5 or more years working in centers MN, previous courses in Biology, Physics SPECT and SPECT Clinical course and a Methodology of Radioisotopes and radiation protection course. Results: The first course lasted 12 months including examinations. Tutors have scarcely been consulted. SPECT/CT and PET/CT web examinations, have been developed and evaluated by the authors of the course (B. Hutton and H. Patterson, University of London and

  18. Research reactors in Argentina

    International Nuclear Information System (INIS)

    Carlos Ruben Calabrese

    1999-01-01

    Argentine Nuclear Development started in early fifties. In 1957, it was decided to built the first a research reactor. RA-1 reactor (120 kw, today licensed to work at 40 kW) started operation in January 1958. Originally RA-1 was an Argonaut (American design) reactor. In early sixties, the RA-1 core was changed. Fuel rods (20% enrichment) was introduced instead the old Argonaut core design. For that reason, a critical facility named RA-0 was built. After that, the RA-3 project started, to build a multipurpose 5 MW nuclear reactor MTR pool type, to produce radioisotopes and research. For that reason and to define the characteristics of the RA-3 core, another critical facility was built, RA-2. Initially RA-3 was a 90 % enriched fuel reactor, and started operation in 1967. When Atucha I NPP project started, a German design Power Reactor, a small homogeneous reactor was donated by the German Government to Argentina (1969). This was RA-4 reactor (20% enrichment, 1W). In 1982, RA-6 pool reactor achieved criticality. This is a 500 kW reactor with 90% enriched MTR fuel elements. In 1990, RA-3 started to operate fueled by 20% enriched fuel. In 1997, the RA-8 (multipurpose critical facility located at Pilcaniyeu) started to operate. RA-3 reactor is the most important CNEA reactor for Argentine Research Reactors development. It is the first in a succession of Argentine MTR reactors built by CNEA (and INVAP SE ) in Argentina and other countries: RA-6 (500 kW, Bariloche-Argentina), RP-10 (10MW, Peru), NUR (500 kW, Algeria), MPR (22 MW, Egypt). The experience of Argentinian industry permits to compete with foreign developed countries as supplier of research reactors. Today, CNEA has six research reactors whose activities have a range from education and promotion of nuclear activity, to radioisotope production. For more than forty years, Argentine Research Reactors are working. The experience of Argentine is important, and argentine firms are able to compete in the design and

  19. Nucleoelectric energy in the Argentine Republic

    International Nuclear Information System (INIS)

    Martin, H.R.

    1989-01-01

    This text intends to reflect a coherent and sustained management in the Argentine nucleoelectrical policy. Through individual thematic unities connected between them, the basic structure consists of three principal parts. The first part introduces a broad panorama of atomic energy in the world, in the international treaties and organizations. Also the technical, economic and political aspects which had influence in the Argentine nuclear policies, particularly in the electrical production with nuclear power plants, are considered in this part. The second part describes the historical sequence of the principal achievements of the Argentine National Atomic Energy Commission (CNEA) in the nuclear industry. A mention of particular criteria adopted in each situation and the intention and motivations that guide the decisions are also considered. Finally, an actual balance of the nucleoelectrical technology situation in Argentine and in the world is presented. (Author) [es

  20. Results of the Argentinian intercomparison on internal dosimetry – 2014. Interpretation of monitoring data for effective dose assessment due to internal exposure

    International Nuclear Information System (INIS)

    Rojo, A.M.; Puerta, N.; Gossio, S.; Gómez Parada, I.

    2015-01-01

    Internal dosimetry intercomparisons are essential for the verification of the models applied and the results consistency. To that aim, in 2014 the National Intercomparison Exercise was organized and coordinated by the Internal Dosimetry Laboratory of the Nuclear Regulatory Authority (ARN) of Argentina. Four simulated cases covering intakes of “1”3”1I, “1”3”7Cs and tritium were proposed. The exercise counted with the participation of four internal dosimetry services from the nuclear power plants (NA-SA CNA and NA-SA CNE) and the CNEA Atomic Centres: Bariloche (CAB) and Ezeiza (CAE). This report shows a complete analysis of the participant’s results in this exercise. (authors) [es

  1. An option for the management of radioactive waste in Argentina

    International Nuclear Information System (INIS)

    Jinchuk, D.

    2001-01-01

    Argentina has an active nuclear program, started in the 50's, which includes two nuclear power plants (NPPs) in operation and one under construction, providing 12% of power generated in the country. Together with eight research reactors, complete facilities at the front and back end of the fuel cycle, such as radioisotope production plants and supporting laboratories in four atomic centers with an extensive research and development (R and D) program and an independent nuclear regulatory authority, constitute the backbone of the country's nuclear activities, employing in total approximately 4500 people. These activities, together with the future decommissioning of nuclear facilities, generate a considerable amount of nuclear waste which needs to be treated properly according to international practices and standards. The safe management of these wastes has being always one of Comision Nacional de Energia Atomica's (CNEA) top priorities. (author)

  2. Process technologies for water desalination

    International Nuclear Information System (INIS)

    Ramilo, Lucia B.; Gomez de Soler, Susana M.; Coppari, Norberto R.

    2003-01-01

    The use of the nuclear energy for simultaneous electricity and potable water production is an attractive, technically feasible, and safe alternative to fossil energy options. In Argentina the nuclear desalination option is being studied together with the alternative uses of the innovative advanced Argentinean CAREM reactor, in the research contract CNEA - IAEA to evaluate projects of nuclear desalination. The objective and scope of this work is to know the advantages and disadvantages of each desalination technology, distinctive characteristics of each of them, that make them adapt better to different uses and outline conditions and analysis of related antecedents of its use in the world. In this report a summarized description of those technologies is included by way of introduction, so as to highlight the main advantages and disadvantages of each of them. The improvements and innovations found in the last years for the different technologies are also included. (author)

  3. San Rafael mining and fabrication complex today

    International Nuclear Information System (INIS)

    Navarra, Pablo; Aldebert, Sergio R.

    2005-01-01

    In Mendoza province, 35 km West San Rafael city, is located a CNEA installation for uranium ore extraction and concentration: the San Rafael Mining and Fabrication Complex. By the middle of the nineties, as a consequence of the very low prices of uranium concentrate in the international market and of the high internal production costs, uranium extraction was stopped. To day, the international price of the concentrate had a very important increase and the Government has decided the completion of the Atucha II Nuclear Power Station construction. Moreover, studies have been started for new nuclear power plants. In such circumstances the reactivation of the Complex will make sure the uranium supply for our nuclear power stations, contributing to the improvement of the energy generation mix in our country. (author) [es

  4. Results of the dosimetry intercomparison

    International Nuclear Information System (INIS)

    Dure, Elsa S.

    2000-07-01

    The appropriate way to verify the accuracy of the results of dose reported by the laboratories that offer lend personal dosimetry service is in the periodic participation of round of intercomparison dosimetry, undertaken by laboratories whose standards are trace (Secondary Laboratory). The Laboratory of External Personal Dosimetry of the CNEA-PY has participated in three rounds of intercomparison. The first two were organized in the framework of the Model Project RLA/9/030 RADIOLOGICAL WASTE SECURITY, and the irradiations were carried out in the Laboratory of Regional Calibration of the Center of Nuclear Technology Development, Belo Horizonte-Brazil (1998) and in the National Laboratory of Metrology of the ionizing radiations of the Institute of Radioprotection and Dosimetry, Rio de Janeiro-Brazil (1999). The third was organized by the IAEA and the irradiations were made in the Physikalisch-Technische Bundesanstalt PTB, Braunschweig - Federal Republic of Germany (1999-2000) [es

  5. Process technologies for water desalination

    International Nuclear Information System (INIS)

    Ramilo, Lucia B.; Gomez de Soler, Susana M.; Coppari, Norberto R.

    2003-01-01

    The use of the nuclear energy for simultaneous electricity and potable water production is an attractive, technically feasible and safe alternative to fossil energy options. In Argentina the nuclear desalination option is being studied together with the alternative uses of the innovative advanced Argentinean CAREM reactor, in a research contract between CNEA and the IAEA to evaluate projects of nuclear desalination. This paper analyses the benefits and drawbacks of each desalination technology, the distinctive characteristics of the technology that fit better the different uses, and outlines the related antecedents of its application in the world. In this report a summarized description of those technologies is included by way of introduction, so as to highlight the main advantages and disadvantages of each of them. The improvements and innovations made in the last years for the different technologies are also described. (author)

  6. PRAMU. Contamination sources

    International Nuclear Information System (INIS)

    Asenjo, Armando R.

    2000-01-01

    Mining and milling activities have been carried out in Argentina during the last 40 years, and nowadays National Atomic Energy Commission (CNEA) of Argentina is undertaking the Uranium Mining Environmental Restoration Project (PRAMU). The aim of this project is to achieve that in all the places where uranium mining activities were developed, to restore the environment as much as it is possible, according to the legislation in force. The sites which are studied are: Malargue (Mendoza province), Cordoba (Cordoba province), Los Gigantes (Cordoba province), Huemul (Mendoza province), Pichinan (Chubut province), Tonco (Salta province), La Estela (San Luis province), Los Colorados (La Rioja province). In order to develop the restoration project in each site, one of the first task to be performed is to know quantities and the chemical, physicals and radiological characteristics of the contamination sources. In the present paper the activities of PRAMU in this field, are informed. (author)

  7. The training of foreign human resources in Argentina

    International Nuclear Information System (INIS)

    Orstein, Roberto M.

    1998-01-01

    The National Atomic Energy Commission (CNEA) has organized in Argentina several training courses and scientific meetings such as inter-regional and regional seminars, symposia and workshops, sponsored by international organizations. In addition, it has accepted a large number of foreign students and scientists sent by those organizations for professional training. These activities have covered a wide range of areas within the nuclear field: the nuclear electrical generation; the various stages of the nuclear fuel cycle from uranium prospecting to fuel manufacture; the production and application of radioisotopes in medicine, biology, veterinary sciences, agriculture, hydrology and industry; the application of ionizing radiation for food preservation and the sterilization of biomedical instruments; radiological protection and nuclear safety, as well as basic and applied scientific and technological research related to nuclear science. Statistics and the description of some of the training courses are given

  8. Determination of primary flow by correlation of temperatures of the coolant; Medicion de caudal primario por correlacion de temperaturas del refrigerante

    Energy Technology Data Exchange (ETDEWEB)

    Villanueva, Jose [Comision Nacional de Energia Atomica, Ezeiza (Argentina). Centro Atomico Ezeiza

    2003-07-01

    Correlation techniques are often used to assess primary coolant flow in nuclear reactors. Observable fluctuations of some physical or chemical coolant properties are suitable for this purpose. This work describes a development carried out at the National Atomic Energy Commission of Argentina (CNEA) to apply this technique to correlate temperature fluctuations. A laboratory test was performed. Two thermocouples were installed on a hydraulic loop. A stationary flow of water circulated by the mentioned loop, where a mechanical turbine type flowmeter was installed. Transit times given by the correlation flowmeter, for different flow values measured with the mechanical flowmeter, were registered and a calibration between them was done. A very good linear behavior was obtained in all the measured range. It was necessary to increase the fluctuation level by adding water at different temperatures at the measuring system input. (author)

  9. Determination of primary flow by correlation of temperatures of the coolant

    International Nuclear Information System (INIS)

    Villanueva, Jose

    2003-01-01

    Correlation techniques are often used to assess primary coolant flow in nuclear reactors. Observable fluctuations of some physical or chemical coolant properties are suitable for this purpose. This work describes a development carried out at the National Atomic Energy Commission of Argentina (CNEA) to apply this technique to correlate temperature fluctuations. A laboratory test was performed. Two thermocouples were installed on a hydraulic loop. A stationary flow of water circulated by the mentioned loop, where a mechanical turbine type flowmeter was installed. Transit times given by the correlation flowmeter, for different flow values measured with the mechanical flowmeter, were registered and a calibration between them was done. A very good linear behavior was obtained in all the measured range. It was necessary to increase the fluctuation level by adding water at different temperatures at the measuring system input. (author)

  10. Experimental loop for SH2 (LECS)

    International Nuclear Information System (INIS)

    Strehar, N.R.; Bruzzoni, Pablo; Moras, J.J.; Cogozzo, E.O.

    1981-01-01

    An experimental loop is described for circulation of SH 2 that operates at 2 x 10 6 Pascal and 33 deg C. It was designed and constructed with the purpose of experimentally studying the hydraulic instability phenomenon that can be detected in cold isotopic exchange columns in the Girdler-Sulfide (GS) process of heavy water production. The main features of the different components of the loop are described, as well as the materials, the measurement and control instruments and the auxiliary equipment used, and finally the measuring methods to qualify and quantify the formation of froth. Furthermore, the loop's transportable metallic container is described, which allows to transport and connect it to CNEA's experimental heavy water plant or to any other heavy water plants using the GS method. Some tests made with inert gases that intended to verify the equipment's performance and to select the most adequate sieve trays for its operation are discussed. (M.E.L.) [es

  11. The nuclear research centre at Bariloche, Argentina

    International Nuclear Information System (INIS)

    Abriata, J.P.

    2001-01-01

    The nuclear research centre at Bariloche (CAB) is one of the four centres under the Atomic Energy Commission of Argentina (CNEA). The research programme of CAB addresses various issues like nuclear reactor development, nuclear fuel and fuel cycle, applications of radioisotopes and radiation, and waste management. There is also a basic nuclear science component. The human resource development in the areas of physics and nuclear engineering is done in an associated Balseiro Institute which has undergraduate and graduate programmes as well as doctoral and postdoctoral research. The Centre interacts well with the society and provides services in the nuclear area. It has a close interaction with the nuclear sector of Argentina as also with many international organisations. Regulatory control over the Centre is carried out by the Nuclear Regulatory Authority of Argentina. (author)

  12. FASTDART - A fast, accurate and friendly version of DART code

    International Nuclear Information System (INIS)

    Rest, Jeffrey; Taboada, Horacio

    2000-01-01

    A new enhanced, visual version of DART code is presented. DART is a mechanistic model based code, developed for the performance calculation and assessment of aluminum dispersion fuel. Major issues of this new version are the development of a new, time saving calculation routine, able to be run on PC, a friendly visual input interface and a plotting facility. This version, available for silicide and U-Mo fuels, adds to the classical accuracy of DART models for fuel performance prediction, a faster execution and visual interfaces. It is part of a collaboration agreement between ANL and CNEA in the area of Low Enriched Uranium Advanced Fuels, held by the Implementation Arrangement for Technical Exchange and Cooperation in the Area of Peaceful Uses of Nuclear Energy. (author)

  13. 1996 Annual report

    International Nuclear Information System (INIS)

    1997-01-01

    This annual report present information of the main activities on the scope of the radiation protection and nuclear safety of the Nuclear Regulatory Authority (ARN) of the Argentina during 1996. The activities are developed in 10 chapters and 2 appendices, were are described the activities and the bases of the Argentine Regulatory System. The followings chapters and appendices are: 1.-Evolution of the nuclear regulatory activities in the Argentina since the beginnings in the CNEA. 2.-Regulatory system, laws and regulations. 3.-Institutional relations with national and international organizations. 4. and 5.-Safeguards and inspections of the nuclear installations. 6.-Radiation control of the occupational and public doses. 7.-Radiological emergencies. 8.-Projects and tasks scientific-technological. 9.-Training courses and meetings. 10.-Economic and human recourses. Appendix I.-Regulatory documentation. Appendix II.- Inspections of nuclear installations

  14. Postirradiation examination of high-U-loaded, low-enriched U3O8, UAl2, and U3Si test fuel plates

    International Nuclear Information System (INIS)

    Gomez, J.; Morando, R.; Perez, E.E.; Giorsetti, D.R.; Copeland, G.L.; Hofman, G.L.; Snelgrove, J.L.

    1985-01-01

    The scope of this work is to present an evaluation of the postirradiation examination of the second set of high-U-loaded, low-enriched U 3 O 8 , UAl 2 and U 3 Si miniature plates manufactured by the Comision Nacional de Energia Atomica (CNEA) of Argentina, and irradiated and examined, within the framework of the Reduced Enrichment Research and Test Reactor (RERTR) Program, at Oak Ridge National Laboratory and Argonne National Laboratory. This paper includes fabrication details of the plates, their irradiation history and the results of postirradiation examination which are compared to those of the previous test and to present results from other laboratories participating in the RERTR Program. Postirradiation examination of these plates showed satisfactory performance for the oxides, aluminides and silicides (except for the highest-loaded U 3 Si plate) with the only indication of detrimental behavior being the slight bowing of some plates at about 80% burnup

  15. Postirradiation examination of high-U-loaded, low-enriched U3O8, UAl2, and U3Si test fuel plates

    International Nuclear Information System (INIS)

    Gomez, J.; Morando, R.; Perez, E.E.; Giorsetti, D.R.; Copeland, G.L.; Hofman, G.L.; Snelgrove, J.L.

    1985-01-01

    The scope of this work is to present an evaluation of the postirradiation examination of the second set of high-U-loaded, low-enriched U 3 O 8 , UAl 2 and U 3 Si miniature plates manufactured by the Comision Nacional de Energia Atomica (CNEA) of Argentina, and irradiated and examined, within the framework of the Reduced Enrichment Research and Test Reactor (RERTR) Program, at Oak Ridge National Laboratory and Argonne National Laboratory. This paper includes fabrication details of the plates, their irradiation history and the results of postirradiation examination which are compared to those of the previous test and to present results from other laboratories participating in the REM Program. Postirradiation examination of these plates showed satisfactory performance for the oxides, aluminides and silicides (except for the highest-loaded U 3 Si plate) with the only indication of detrimental behavior being the slight bowing of some plates at about 80% burnup. (author)

  16. Calibration and control modules for gamma-ray borehole loggers

    International Nuclear Information System (INIS)

    1983-01-01

    A calibration pad for quantitative evaluation of gamma-ray logs, developed and constructed by CNEA is described. The facility is composed of a set of mineralized modules with which it is intended to reproduce the natural variable conditions found in boreholes drilled for uranium mineral exploration, such as the ore concentration, rock's density and porosity, water content, etc. The facility is able to operate under different radiometric models, as follow: 1) gross-count gamma-ray models; 2) gamma-spectrometer models; 3) neutronic-fission models, and 4) models for determination of magnetic susceptibility, density, neutron-neutron, etc. The gathered information allows the adequate quantitative radiometric evaluation of the ore bodies crossed by exploration holes, and also allows the correlation of gamma-ray logs obtained by different logger-equipments. The paper includes the description of the project development and the standards established for the facility's operation. (M.E.L.) [es

  17. Postirradiation examination of high-U-loaded low-enriched U3O8, UAl2, and U3Si test fuel plates

    International Nuclear Information System (INIS)

    Gomez, J.; Morando, R.; Perez, E.E.; Giorsetti, D.R.; Copeland, G.L.; Hofmann, G.; Snelgrove, J.L.

    1984-01-01

    The scope of this work is to present an evaluation of the postirradiation examination of the second set of high-U-loaded low-enriched U 3 O 8 , UAl 2 and U 3 Si miniature plates manufactured by the Comision Nacional de Energia Atomica (CNEA) of Argentina, and irradiated and examinated, within the framework of the Reduced Enrichment Research and Test Reactor (RERTR) Program, at Oak Ridge National Laboratory and Argonne National Laboratory. This paper includes fabrication details of the plates, their irradiation history and the results of postirradiation examination which are compared to those of the previous test and to present results from other laboratories participating in the RERTR Program. Postirradiation examination of these plates showed satisfactory poerformance for the oxides, aluminides and silicides (except for the highest-loaded U 3 Si plate) with the only indication of detrimental behavior during the slight bowing of some plates at about 80% burnup

  18. Design of an ion exchange column for plutonium recovery

    International Nuclear Information System (INIS)

    Araujo, J.A. de; Matsuda, H.T.; Santos Tome Lobao, A. dos; Quesada, A.C.

    1994-01-01

    An ion exchange column design for plutonium recovering from scraps of the MOX fuel elements fabrication is presented. The proposed column is constructed in 304 stainless steel and borosilicate glass provided of heating-jacket and temperature control and pressure relief devices. Safety aspects required for alpha emitters handling have been also considered. The design and construction were performed totally at Brazilian Institute for Energetic and Nuclear Research. The equipment will be used in the plutonium separation step as a part of an installation named Facilidad Alfa at the Centro Atomico de Constituyentes-CNEA/Buenos Aires, where other processes, including dissolution denitration by microwaves and final steps of MOX pellets re-fabrication will be performed. (author). 4 refs, 3 figs

  19. Standardization of Ga-68 by coincidence measurements, liquid scintillation counting and 4πγ counting.

    Science.gov (United States)

    Roteta, Miguel; Peyres, Virginia; Rodríguez Barquero, Leonor; García-Toraño, Eduardo; Arenillas, Pablo; Balpardo, Christian; Rodrígues, Darío; Llovera, Roberto

    2012-09-01

    The radionuclide (68)Ga is one of the few positron emitters that can be prepared in-house without the use of a cyclotron. It disintegrates to the ground state of (68)Zn partially by positron emission (89.1%) with a maximum energy of 1899.1 keV, and partially by electron capture (10.9%). This nuclide has been standardized in the frame of a cooperation project between the Radionuclide Metrology laboratories from CIEMAT (Spain) and CNEA (Argentina). Measurements involved several techniques: 4πβ-γ coincidences, integral gamma counting and Liquid Scintillation Counting using the triple to double coincidence ratio and the CIEMAT/NIST methods. Given the short half-life of the radionuclide assayed, a direct comparison between results from both laboratories was excluded and a comparison of experimental efficiencies of similar NaI detectors was used instead. Copyright © 2012 Elsevier Ltd. All rights reserved.

  20. Institutional opening: contribution to the public acceptance of the nuclear activities

    International Nuclear Information System (INIS)

    Martin, Hugo R.

    2003-01-01

    Activities that the National Atomic Energy Commission (CNEA) has carried out during a half century in Cordoba city show a long misunderstanding and confrontations with the provincial and municipal authorities, and with the neighbors and environmentalist antinuclear organizations. Most of the information that the people have received about the risks and benefits of the activities has generally been produced by the media. The media have always started the pressures on the political leadership and the government officials, to get measures on activities that are perceived as excessively dangerous. However the experience indicates that the demands for the protection of the health or the environment and sometimes the claiming for the closing of the facilities have been directly related with what people really know about the activities in the site. All that they know, comes from listening the radio and television or reading the newspapers. The common denominator that one observes in the conflicts of the past, is the high degree of ignorance on the part of the citizenship on the activities that are carried out in the place. This is valid for the neighbors of the place, for the competent authorities and even for the Cordoba's scientific and technical qualified community. From the analysis it also arises that the conflicts were originated by the absence of preventive actions to assist them properly (or to neutralize them in premature form) as well as for fair reasons related with unacceptable risks for the society. Finally the facts have demonstrated that the incompatibility among the reasoning of the technicians supporting their positions in rational arguments and the fundamentalism of the environmentalist's methodology using incomplete and emotional arguments, makes impossible a sustainable agreement for the development of the activities of the CNEA in Cordoba city. The origin of the conflicts are essentially two: the existence in the site of the residues of the minerals

  1. Institutional opening: contribution to the public acceptance of the nuclear activities; Apertura institucional: una contribucion a la aceptacion publica de las actividades nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Martin, Hugo R [Comision Nacional de Energia Atomica, Mendoza (Argentina). Regional Cuyo

    2003-07-01

    Activities that the National Atomic Energy Commission (CNEA) has carried out during a half century in Cordoba city show a long misunderstanding and confrontations with the provincial and municipal authorities, and with the neighbors and environmentalist antinuclear organizations. Most of the information that the people have received about the risks and benefits of the activities has generally been produced by the media. The media have always started the pressures on the political leadership and the government officials, to get measures on activities that are perceived as excessively dangerous. However the experience indicates that the demands for the protection of the health or the environment and sometimes the claiming for the closing of the facilities have been directly related with what people really know about the activities in the site. All that they know, comes from listening the radio and television or reading the newspapers. The common denominator that one observes in the conflicts of the past, is the high degree of ignorance on the part of the citizenship on the activities that are carried out in the place. This is valid for the neighbors of the place, for the competent authorities and even for the Cordoba's scientific and technical qualified community. From the analysis it also arises that the conflicts were originated by the absence of preventive actions to assist them properly (or to neutralize them in premature form) as well as for fair reasons related with unacceptable risks for the society. Finally the facts have demonstrated that the incompatibility among the reasoning of the technicians supporting their positions in rational arguments and the fundamentalism of the environmentalist's methodology using incomplete and emotional arguments, makes impossible a sustainable agreement for the development of the activities of the CNEA in Cordoba city. The origin of the conflicts are essentially two: the existence in the site of the residues of the minerals

  2. Hardening of single crystals of magnesium by low neutron doses at 77 K

    International Nuclear Information System (INIS)

    Gonzalez, H.C.

    1984-01-01

    Radiation hardening in Mg single crystals at 77 K is studied with a microtensile machine operating in-situ in the CNEA reactor facility RA1. Experimental results show that the dose dependence of the yield stress is similar to that previously observed in irradiated Cu and Zn. The radiation-induced yield stress, due to the presence of radiation obstacles operating alone, increases according to a 0.5 power law. It adds algebraically to the athermal component of the initial yield stress, but is not exactly additive to the other thermally activated mechanisms. For doses higher than 4.5 x 10 16 neutrons/cm 2 , a strong instability in the deformation is observed. Post irradiation experiments in tensile tests performed with a hard machine show a continuous stress drop. This effect is attributed to the dislocation channeling phenomenon which takes place during the tensile test. (author)

  3. The Argentine remote monitoring and surveillance system

    International Nuclear Information System (INIS)

    Bonino, A.; Roca, J.L.; Perez, A.; Pizarro, L.; Krimer, M.; Teira, R.; Higa, Z.; Saettone, S.; Monzon, J.; Moroni, D.

    1996-01-01

    The Scientific and Technical Support Department of the Argentine National Board of Nuclear Regulation (ENREN) has developed a Remote Monitoring and Surveillance System (RMSS) that provides a media to verify state of variables related to the monitoring and surveillance activities of nuclear facilities, mainly safeguard applications. RMSS includes a variety of on site installed sensors, an authenticated radiofrequency communication link, a receiver processing unit, an active vision set and a user friendly personal computer interface to collect, view and store pertinent histories of events. A real time data base allows consulting, maintenance, updating and checking activities. RMSS could be integrated into a LAN or WAN via modem for use in a remote operation scheme. In this paper a description of the RMSS is provided. Also, an overview of the RMSS operation at one facility under safeguards belonging to the National Commission of Atomic Energy (CNEA) is presented. Results and conclusions of the system associated with this facility are given. (author). 37 figs

  4. Development of low enrichment technologies for high density fuels and for isotope production targets

    International Nuclear Information System (INIS)

    Taboada, Horacio; Gonzalez, Alfredo G.

    2005-01-01

    Since more than twenty years ago, CNEA has carried out RERTR activities. Main goals are to convert the RA 6 reactor core from HEU to LEU, to get a comprehensive understanding of U-Mo/Al compounds phase formation in dispersed and monolithic fuels, to develop possible solutions to VHD dispersed and monolithic fuels technical problems, and to optimize techniques to recover U from silicide scrap samples. The future plans include: 1) Completion the RA 6 reactor conversion to LEU; 2) Qualification by irradiation of the promising solutions found for the high density fuels; 3) Irradiation of mini plates and full scale fuel assemblies at the RA 3 reactor and at higher flux and temperature reactors; 4) Optimization of LEU target and radiochemical techniques for radioisotope production. (author) [es

  5. Experimental and Simulated Characterization of a Beam Shaping Assembly for Accelerator- Based Boron Neutron Capture Therapy (AB-BNCT)

    International Nuclear Information System (INIS)

    Burlon, Alejandro A.; Valda, Alejandro A.; Girola, Santiago; Minsky, Daniel M.; Kreiner, Andres J.

    2010-01-01

    In the frame of the construction of a Tandem Electrostatic Quadrupole Accelerator facility devoted to the Accelerator-Based Boron Neutron Capture Therapy, a Beam Shaping Assembly has been characterized by means of Monte-Carlo simulations and measurements. The neutrons were generated via the 7 Li(p, n) 7 Be reaction by irradiating a thick LiF target with a 2.3 MeV proton beam delivered by the TANDAR accelerator at CNEA. The emerging neutron flux was measured by means of activation foils while the beam quality and directionality was evaluated by means of Monte Carlo simulations. The parameters show compliance with those suggested by IAEA. Finally, an improvement adding a beam collimator has been evaluated.

  6. Nuclear fuel supply view in Argentina

    International Nuclear Information System (INIS)

    Cirimello, R.O.

    1997-01-01

    The Argentine Atomic Energy Commission promoted and participated in a unique achievement in the R and D system in Argentina: the integration of science technology and production based on a central core of knowledge for the control and management of the nuclear fuel cycle technology. CONUAR SA, as a fuel manufacturer, FAE SA, the manufacturer of Zircaloy tubes, CNEA and now DIOXITEC SA producer of Uranium Dioxide, have been supply, in the last ten years, the amount of products required for about 1300 Tn of equivalent U content in fuels. The most promising changes for the fuel cycle economy is the Slight Enriched Uranium project which begun in Atucha I reactor. In 1997 seventy five fuel assemblies, equivalent to 900 Candu fuel bundles, will complete its irradiation. (author)

  7. FISH detection of chromosomal aberrations: the state-of-the-art in Argentina

    International Nuclear Information System (INIS)

    Nasazzi, Nora B.; Maranon, David; Muhlmann, Maria del C.

    2004-01-01

    The combined application of cytogenetics and molecular biology allows the identification, through fluorescence in situ hybridization technique (FISH), of numerical and structural chromosomal genetic alterations. The application fields are: the basic genetic research in man and other species, medical diagnosis and prognosis related to constitutive and somatic cell genetics, and biological dosimetry. Up to now, in our country as in the rest of Latin America, FISH is performed using commercial DNA probes. In a joint effort of CONICET, CNEA and ARN, Argentina has concluded the project to develop at pilot scale the synthesis of fluorescent probes by Chromosome Microdissection (SMF), suitable for any species and lowering the costs to about one sixth of the equivalent commercial probes. In this work, we present the general protocol, the cost analysis comparing with commercial probes and the minimum requirements for technology transfer and implementation of this technique in Latin American countries. (author)

  8. Radiodisinfestation of cultural and religious objects

    International Nuclear Information System (INIS)

    Ritacco, Miguel A.

    2003-01-01

    The ionizing radiation treatment of cultural and religious objects to control the arthropod fauna seems to be a non toxic, non contaminant process that, at the radiation dose needed to control the insects and other arthropods, is not detrimental to the objects. Since 1999 CNEA has been working on the radiodisinfestation of cultural and religious objects. The Laboratory of Radiodisinfestation of the Ezeiza Atomic Center has studied musical instruments, books, religious imagery, oil paintings, embalmed animals, bones, tapestry, clothes and sculptures, to identify the contaminant arthropods and to treat them by ionizing radiation at doses between 3 and 5 kGy in the Semi-Industrial Irradiation Plant of the Center. At present, in addition to these activities, the effects of the radiation on paintings are being studied with the Pratt Institute of New York as well as the radiation effects on different types of fabrics with the University of Buenos Aires. (author)

  9. Public involvement in the decision making process, Argentine experience

    International Nuclear Information System (INIS)

    Clein, D.

    1999-01-01

    In the frame of a young participative democracy the Comision Nacional de Energia Atomica (C.N.E.A.), technical and legal responsible for radioactive waste management, is developing a plan for the close out of tailings facilities from past mining and milling operations and the environmental restoration of nine different sites in six provinces all over the country. In the first site, Malargue Facility, different activities have been developed promoting public involvement in the decision making process. The lessons learned and the experience acquired have given the background for the systematization of public consultation in the ongoing and future stages of the plan. Malargue's experience in this field will be analyzed stressing on different aspects considered of importance for the design of a communicational strategy adapted to the characteristics of a society without experience in this field. The influence of public concern on conservative bias of technical decisions will be evaluated. (author)

  10. Micro-computer based communication system

    International Nuclear Information System (INIS)

    Meyers, M.; Hinton, C.; Pauly, C.; Tau, S.; Rathmell, R.

    1981-01-01

    The CNEA 20UD tandem accelerator manufactured by National Electrostatics Corp. is predominately controlled through a hard wired console. In the past, accelerators have used mechanical control rods to control parameters inside the high voltage terminals and dead sections. The 20UD column, has relatively complex equipment within the terminal and dead sections. Because of its complexity and the length of the column (approximately 48 ft. from ground to terminal) it was concluded that a digital communication link would be required to provide the smooth, high resolution control needed for the ion-optic components and to provide a reliable system to monitor the large number of parameters. To further ensure reliability, some basic components such as foil strippers and the terminal matching quadrupole have back-up control via control rods to allow limited operation in the event of a failure of the digital system

  11. Actual Status of CAREM-25 Fuel Element Development

    International Nuclear Information System (INIS)

    Perez, Edmundo

    2000-01-01

    In the frame of the CAREM Project, under Cnea s Reactor and Nuclear Plants Program, the Nuclear Fuel Thematic Area is one among others on which the project is organized. In this area, the primary objective to reach is to actualize the mechanical fuel element and reactivity control designs, taking in account the recents conceptual and engineering modifications introduced in the reactor, and ending with a consolidated conceptual and basic development.In order to reach these objectives, it is presented the way on which the area was organized, the participating working groups, the task required, the personnel involucrated, the grade of global development reached in the areas of engineering, developments, fabrication and essays of design verification, and the found difficulties, the tasks under ejecution, just finished and necessaries to fulfill completely the objectives. Finally, it is possible to say that due to the work realized, the conceptual design of both components is finished and the basic design is under development

  12. Quality of air in Asuncion

    International Nuclear Information System (INIS)

    2007-12-01

    The quality of the air in the city of Asuncion was evaluated, studying the distribution of the main chemical elements that are present in the sampling sites, using Bio monitors Tillandsia Meridionalis Baker and Tillandsia Recurvata L. and analyzed by of the ray-x florescence, technique the data were analyzed by means of the AXIL software and the results were a statistically analyzed by the SPSS Software for the creation of the maps of concentration distribution of the different elements from interest. The project was carried out multidisciplinary group integrated by the CNEA as Coordinator and executor; the Facultad de Ciencias Agrarias; the Facultad de Ciencias Quimicas; the Facultad de Ciencias Exactas y Naturales of the Universidad Nacional de Asuncion, as well as the Municipalidad de Asuncion.The material was done by specialists in the field and with the financial support of the IAEA [es

  13. Separating rings detection in fuel channels of Embalse NPP

    International Nuclear Information System (INIS)

    Obrutsky, L.S.; Otero, P.A.; Schmidt, O.A.

    1988-01-01

    The design specifications of Embalse Nuclear Power Plants (CANDU Type Reactor 600Mw) define the positions to be taken by 4 separating rings of the fuel channels. Experience has demonstrated the displacement possibility of the above mentioned rings. It means a risk of contact between pressure tube and calandria tube. In order to determine the position of separating rings, an inspection system based on Eddy Currents technique was developed by CNEA personnel. Detection is performed through two special probes operating according the ''emitter-receiver'' principle. Obtained signals and its relative position are recorded in a video tape and registered in paper. The probe is telecommanded by an automatic equipment. In this paper the construction and calibration of the detection equipment is described, as well as the propulsion. Final results are also outlined in the inspection carried out in November 1986 when an effective displacement of separating rings was verified from its design position in most of the inspected tubes

  14. UO2: production based on two alternative lines

    International Nuclear Information System (INIS)

    Coppa, R.C.; Martin, H.R.

    1987-01-01

    The production of the uranium dioxide (UO 2 ) is carried out at the Cordoba factory, of the Argentine National Atomic Energy Commission, by the uranil carbonate method (AUC). The commercial uranium concentrates (yellow cake) is dissolved with HNO 3 and purificated with tributil phosphate (TBP). The pure uranium compound coming from the reextraction, is concentrated to 0.4 Kg U/l, then the precipitation with CO 2 and NH 3 gives the AUC crystalls. After conversion of AUC to UO 2 powder, the pellets are obtained by direct compacting. In the second experimental method used by CNEA, the yellow cake is dissolved with H 2 SO 4 , and then it is purified with a terciary amine and precipitated with (NH 4 ) 2 CO 3 . In this form the ammonium uranil tri-carbonate (AUT) crystals are obtained. The convertion to UO 2 is made under an atmosphere of dissociated NH 3 . (M.E.L.) [es

  15. Laboratory research on back end issues of the Mo-99 production

    International Nuclear Information System (INIS)

    Falcon, M.; Russo, A.; Schickendantz, F.; Vaccaro, J.

    2002-01-01

    The Argentinean National Atomic Energy Commission (CNEA) is now beginning to produce fission 99Mo (parent of the radionuclide 99mTc, widely used in medicine) by irradiation of targets containing 20% enriched uranium. The reduction from the previously employed enrichment of 90% implies an increase in the mass of uranium necessary to produce the same 99Mo activity. This, and the fact that the irradiated uranium has a very low burn-up, led to the decision of studying the feasibility of a method for the recovery (and later reuse) of the irradiated uranium, in order to reduce purchase and post-irradiation storage costs. This task is part of a project for to improving several aspects of the 99Mo production process (including the recovery and purification of other valuable fission products, such as 137Cs, 90Sr and 133Xe). (author)

  16. 1996 Annual report; 1996 Informe anual

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    This annual report present information of the main activities on the scope of the radiation protection and nuclear safety of the Nuclear Regulatory Authority (ARN) of the Argentina during 1996. The activities are developed in 10 chapters and 2 appendices, were are described the activities and the bases of the Argentine Regulatory System. The followings chapters and appendices are: 1.-Evolution of the nuclear regulatory activities in the Argentina since the beginnings in the CNEA. 2.-Regulatory system, laws and regulations. 3.-Institutional relations with national and international organizations. 4. and 5.-Safeguards and inspections of the nuclear installations. 6.-Radiation control of the occupational and public doses. 7.-Radiological emergencies. 8.-Projects and tasks scientific-technological. 9.-Training courses and meetings. 10.-Economic and human recourses. Appendix I.-Regulatory documentation. Appendix II.- Inspections of nuclear installations.

  17. Argentine activities on fuels for nuclear generation stations

    International Nuclear Information System (INIS)

    Olezza, R.L.; Valesi, J.

    1995-01-01

    In the last six years, significant changes have taken place in the nuclear fuel activity field in Argentina, therefore all the areas of the nuclear fuel cycle have been strongly influenced by these. The strategies carried out by CNEA to give an initial answer to the modifications of the domestic and international context of the nuclear fuel cycle were described in the previous Conference. Three years later, it is possible to appreciate the first results of the application of those strategies, and also that the frame has continued not only evolving and requiring new answers, but adapting and accentuating some strategies as well. A brief review of those results is presented here, together with a summary of the condition of the current situation and of the proposals to face it. (author)

  18. The Argentine remote monitoring and surveillance system

    Energy Technology Data Exchange (ETDEWEB)

    Bonino, A; Roca, J L; Perez, A; Pizarro, L; Krimer, M; Teira, R; Higa, Z; Saettone, S; Monzon, J; Moroni, D [Ente Nacional Regulador Nuclear, Buenos Aires (Argentina). Dept. Apoyo Cientifico y Tecnico

    1997-12-31

    The Scientific and Technical Support Department of the Argentine National Board of Nuclear Regulation (ENREN) has developed a Remote Monitoring and Surveillance System (RMSS) that provides a media to verify state of variables related to the monitoring and surveillance activities of nuclear facilities, mainly safeguard applications. RMSS includes a variety of on site installed sensors, an authenticated radiofrequency communication link, a receiver processing unit, an active vision set and a user friendly personal computer interface to collect, view and store pertinent histories of events. A real time data base allows consulting, maintenance, updating and checking activities. RMSS could be integrated into a LAN or WAN via modem for use in a remote operation scheme. In this paper a description of the RMSS is provided. Also, an overview of the RMSS operation at one facility under safeguards belonging to the National Commission of Atomic Energy (CNEA) is presented. Results and conclusions of the system associated with this facility are given. (author). 37 figs.

  19. Mechanical properties of zircaloy-4 tubes for CAREM 25 fuel rods

    International Nuclear Information System (INIS)

    Juarez, G; Bianchi, D; Flores, A; Vizcaino, P

    2012-01-01

    The aim of the present work was giving support to the development of Zircaloy-4 fuel claddings for the CAREM 25 reactor through microstructural and mechanical properties studies along the manufacturing process. The manufacturing route was defined in 4 cold rolling stages and two thermal treatments, one at the middle and one after the last rolling stage. The first two rolling stages were performed in FAESA and the last two in PPFAE-CNEA using the rolling machine HPTR 8-15. The reference values for the evaluation were those indicated in the technical specification CAREM25 F ET-3-B0610. In this context, four tubes were received from FAESA. To these tubes mechanical properties determinations were performed to characterize the material in each step performed in PPFAE. The mechanical properties of the cladding tubes also achieve the standard values (σ 0.2 = 450 MPa, e = 15%), being σ 0.2 = 530 MPa and 18% the elongation (author)

  20. Argentine nuclear energy standardization activities

    International Nuclear Information System (INIS)

    Boero, Norma; Corcuera, Roberto; Palacios, Tulio A.; Hey, Alfredo M.; Berte, G.; Trama, L.

    2004-01-01

    The International Organization for Standardization (ISO) has more than 200 Technical Committees that develop technical standards. During April 2004 took place in Buenos Aires the 14th Plenary of the ISO/TC 85 Nuclear Energy Committee. During this Plenary issues as Nuclear Terminology, Radiation Protection, Nuclear Fuels, Nuclear Reactors and Irradiation Dosimetry was dealt with. 105 International delegates and 45 National delegates (belonging to CNEA, ARN, NASA, INVAP, CONUAR, IONICS and other organizations) attended the meetings. During this meeting ISO/TC 85 changed its scope; the new scope of the Committee is 'Standardization in the fields of peaceful applications of nuclear energy and of the protection of individuals against all sources of ionizing radiations'. This work summarizes the most important advances and resolutions about the development of standards taken during this meeting as well as the main conclusions. (author) [es

  1. RP-10: commissioning. Reproduction by physical experiences calculation

    International Nuclear Information System (INIS)

    Higa, Manabu; Madariaga, M.R.

    1990-01-01

    This work presents the neutronic calculation results, most of which were carried out after such experiences, to verify the calculation methodology developed at the Analysis and Calculation Department of the National Atomic Energy Commission (CNEA). The results obtained were satisfactory, proving that the calculation methodology used is adequate for the design of this type of reactors. The only important disagreement is to evaluate the reactivity excess and cut reactivity, but this responds to a criterion difference and/or that of definition for these parameters. The positions of criticality with errors lower than 100 pcm were predicted. The differential and integral reactivities for the calibration of bars, as well as the flux distribution, are reproduced in a reasonable degree in relation to differences inferior to 10%. (Author) [es

  2. Software development of the mechanical vibration monitoring system of the CNA I reactor internals by neutron noise technique

    International Nuclear Information System (INIS)

    Wentzeis, Luis M.; Calvo, Maria D.

    2009-01-01

    The neutron noise analysis technique is an important predictive maintenance tool for early detection of failures such as sensor malfunctions and incipient mechanical problems located in the reactor internals. This technique was applied successfully in Argentina since 1987. The FER-GAEN group dependent of the CNEA developed the measuring system to detect anomalies as early as possible. The magnitude of interest in this analysis is the fluctuating component of the neutron flux known as 'neutron noise'. In order to improve and facilitate the analysis, a new software code was developed for the data acquisition of the neutron noise signals and neutron spectra estimation in the frequency domain. The RMS values related with the internals vibrations are calculated from these spectra and are chronologically displayed, in order to detect any anomalous vibration or incipient detector malfunction as early as possible. (author)

  3. Radiological protection and nuclear safety postgraduate course

    International Nuclear Information System (INIS)

    Segado, R.C.; Menossi, C.A.

    1998-01-01

    Full text: The first Radiation Protection and Nuclear Safety Postgraduate Course was held in 1977, when the former Radioprotection and Nuclear Safety Branch of the National Atomic Energy Commission decided implement that course for the qualification of its professionals. After then, in 1980, by agreement between the CNEA, the National University of Buenos Aires and the Ministry of Health and Social Welfare got its present academic qualification as a Post-Graduate Course. Since then, it was sponsored by the IAEA. This Organization annually grants fellowships to fifteen students from different countries. Up to now, twenty consecutive courses have been delivered and more than five hundredth graduated, more than half of them coming from abroad. The aim of the course is the qualification and training in Radiological Protection and Nuclear Safety of those professionals involved in the design, construction, operation and decommissioning of Nuclear and Radioactive Installation and their related regulatory issues. (author) [es

  4. How Belgium helped establish a surveillance programme for Argentina's Atucha-2

    Energy Technology Data Exchange (ETDEWEB)

    Mitev, Lubomir [NucNet, Brussels (Belgium)

    2015-02-15

    Collaboration between Belgian experts and Argentina on the commissioning of Argentine reactors helped overcome problems caused by delays with construction. Marc Scibetta, deputy manager for nuclear materials science, from the Belgian Nuclear Research Centre (SCK CEN) gave an interview in which he told some facts to Lubomir Mitev of NucNet. The cooperation between SCK CEN an Argentina's Comision Nacional de Energia Atomica (CNEA) started in 2002. The first project was a support for the safety evaluation of the Atucha-1 reactor pressure vessel. When Argentina resumed the construction of Atucha-2 in 2006 - originally, construction started in 1981 but was suspended in 1985 due to financial reasons -, SCK CEN was asked to develop and implement a surveillance programme for the unit.

  5. CARA, new concept of advanced fuel element for HWR

    International Nuclear Information System (INIS)

    Florido, P.C.; Crimello, R.O.; Bergallo, J.E.; Marino, A.C.; Delmastro, D.F.; Brasnarof, D.O.; Gonzalez, J.H.

    1999-01-01

    All Argentinean NPPs (2 in operation, 1 under construction), use heavy water as coolant and moderator. With very different reactor concepts (pressure Vessel and CANDU type designs), the fuel elements are completely different in its concepts too. Argentina produces both types of fuel elements at a manufacturing fuel element company, called CONUAR. The very different fuel element's designs produce a very complex economical behavior in this company, due to the low production scale. The competitiveness of the Argentinean electric system (Argentina has a market driven electric system) put another push towards to increase the economical competitiveness of the nuclear fuel cycle. At present, Argentina has a very active Slightly Enriched Uranium (SEU) Program for the pressure vessel HWR type, but without strong changes in the fuel concept itself. Then, the Atomic Energy Commission in Argentina (CNEA) has developed a new concept of fuel element, named CARA, trying to achieve very ambitious goals, and substantially improved the competitiveness of the nuclear option. The ambitious targets for CARA fuel element are compatibility (a single fuel element for all Argentinean's HWR) using a single diameter fuel rod, improve the security margins, increase the burnup and do not exceed the CANDU fabrication costs. In this paper, the CARA concept will be presented, in order to explained how to achieve all together these goals. The design attracted the interest of the nuclear power operator utility (NASA), and the fuel manufacturing company (CONUAR). Then a new Project is right now under planning with the cooperation of three parts (CNEA - NASA - CONUAR) in order to complete the whole development program in the shortest time, finishing in the commercial production of CARA fuel bundle. At the end of the this paper, future CARA development program will be described. (author)

  6. Development of an immobilisation technique by cementation for non-radioactive simulated liquid waste, from Mo-99 production process

    International Nuclear Information System (INIS)

    Arva, E A; Marabini, S G; Varani, J L

    2012-01-01

    The Argentine Atomic Energy Commission (CNEA) is the responsible for developing a management nuclear waste disposal programme. This programme contemplates the strictly environmental safe and efficient management of the radioactive waste from different sources. Since 1985, CNEA has been producing commercially Mo-99 for medical use. In this process two types of liquid waste are produced. One of them has high alkaline (NaOH 3,5M) and aluminate contents. Since Mo-99 production started, such liquid waste was stored in specially designed containers during production, and after a decay period in smaller containers in interim storage conditions. As this waste is still a liquid, development of an immobilisation technique is required. Immobilisation of radioactive liquid waste by cementation is a frequently used technique, and will be studied in the present work using Mo-99 non-radioactive simulated liquid waste. In this second stage, a full scale (200 liters drum) cementation test using simulated non radioactive waste was carried out. Such test included: using the BEBA 201 mixing machine - the same that will be used with real waste in the future for 'tuning up' the process, construction of a specially designed temperature sensor for measuring the maximum temperature value (five different positions, four inside the drum and one outside) and the time elapsed after all components mixing. Finally, standard specimens (IRAM 1622) were made for mechanical resistance tests after cement setting at 28 days. The results show values of temperature not above 40 o C with the maximum at 12 hours before component mixing and compression strength of 14 MPa. Such values are compatible for a waste immobilisation process by cementation (author)

  7. Generating a quality management system for application in the field of management of nuclear energy area

    International Nuclear Information System (INIS)

    Fernández, L.; Arias, M.

    2013-01-01

    The actual work has as a main objective to present the development of a quality management system to be applicable to the Nuclear Energy Management confines at the National Atomic Energy Commission (CNEA) in Argentina Republic. The GAEN Quality Management Section (SGC) has as main central tasks to streamline, collaborate and facilitate the development of activities and their applications on quality management systems in all the sections and projects belonging to GAEN. This achievement will tend to accredit, certificate and qualify them. Groups of work cooperating with each other integrate the GAEN. They are at present dealing with several tasks. Some outstanding ones are research activities, technology development, design, engineering, assembling, starting, services, and human resources development on Nuclear Reactors and Nuclear Supplies, particularly on powerful nuclear reactors. In 2012, at the annual CNEA Presidential meeting, it was presented one of the several projects from the SGC. It consists in the development of a quality management system available to every area belonging to the GAEN. To carry this project out, it was first begun with the elaboration of Guide Documents which were available for everybody. The documents establish the criteria and general requirements for obtaining guaranteed quality results about the performed activities. At the same time, several areas, sections and Management groups of work have been working united and well-disposed towards the application on their own Management System using the Guide Documents and considering, in addition, some own regards. In conclusion, this first step shows that the developed work facilitates the implementation of Management Systems around the GAEN. (author)

  8. Criticality and shielding calculations of an interim dry storage system for the spent fuel from Atucha I Nuclear Power Plant

    International Nuclear Information System (INIS)

    Silva, M

    2006-01-01

    The Atucha I Nuclear Power Plant (CNA-I) has enough room to store its spent fuel (SF) in damp in its two pool houses until the middle of 2015.Before that date there is the need to have an interim dry storage system for spent fuel that would make possible to empty at least one of the pools, whether to keep the plant operating if its useful life is extended, or to be able to empty the reactor core in case of decommissioning.Nucleolectrica Argentina S.A. (NA-SA) and the Comision Nacional de Energia Atomica (CNEA), due to their joint responsibility in the management of the SF, have proposed interim dry storage systems.These systems have to be evaluated in order to choose one of them by the end of 2006.In this work the Monte Carlo code MCNP was used to make the criticality and shielding calculations corresponding to the model proposed by CNEA.This model suggests the store of sealed containers with 36 or 37 SF in concrete modules.Each one of the containers is filled in the pool houses and transported to the module in a transference cask with lead walls.The results of the criticality calculations indicates that the solutions of SF proposed have widely fulfilled the requirements of subcriticality, even in supposed extreme accidental situations.Regarding the transference cask, the SF dose rate estimations allow us to make a feedback for the design aiming to the geometry and shielding improvements.Regarding the store modules, thicknesses ranges of concrete walls are suggested in order to fulfill the dose requirements stated by the Autoridad Regulatoria Nuclear Argentina [es

  9. Evaluation of Argentinian industrial capacity and of suppliers for nuclear installations

    International Nuclear Information System (INIS)

    Volman de Tanis, S.

    1986-04-01

    This work describes and analyses the Argentinian system of purchasing, the laws and decrees which must be observed by the State enterprises and dependent bodies such as the National Atomic Energy Commission (C.N.E.A.). Within the system there are regulations which must be observed by the State suppliers, and to which the purchasing bodies must conform. Furthermore, there is a thorough analysis of the methods implemented before beginning the construction of the third nuclear plant in Argentina, the Atucha II Nuclear Plant. For this, all the existing antecedents were taken into account, insofar as they were related to the prior projects, and an exhaustive questionnaire was elaborated, in which the examined enterprises described in detail their installed capacity, their antecedents, their human resources, etc. The data thus obtained were evaluated and the task was concluded by drawing up lists of the possible enterprises to supply the most diverse components, services or equipment required both by the electrical plant and for any other large scale work. The evaluation obtained would allow an analysis of the foreign offers concerning the entire project and of the possible participation with each bidder of Argentinian industry and engineering. A description is given of the advanced method used to assess bidders with respect to such participation, to assess the replies to the questionnaire, which were analysed in detail, and the weighting factors applied to each item. Also described are some major contracts concluded with enterprises in the country. These contracts relate to the external acquisition of technology for nuclear plants and the essential points are outlined. Also analysed are the results obtained during the execution of the programmes of technology transfer and training, both for parts of different enterprises selected to produce the components, and for the State, through C.N.E.A. and ENACE S.A. 6 refs, 5 tabs

  10. MOX fuel development: Experience in Argentina

    International Nuclear Information System (INIS)

    Marchi, D.E.; Adelfang, P.; Menghini, J.E.

    1999-01-01

    Since 1973, when a laboratory conceived for the safe manipulation of a few hundred grams of plutonium was built, the CNEA (Argentinean Atomic Energy Commission) has been involved in the small-scale development of MOX fuel technology. The plutonium laboratory consists in a glove box facility (α Facility) featuring the necessary equipment to prepare MOX fuel rods for experimental irradiations and to carry out studies on preparative processes development and chemical and physical characterization. The irradiation of the first prototypes of (U,Pu)O 2 fuels fabricated in Argentina began in 1986. These experiments were carried out in the HFR (High Flux Reactor)- Petten , Holland. The rods were prepared and controlled in the CNEA's a Facility. The post-irradiation examinations (PIE) were performed in the KFK (Kernforschungszentrum Karlsruhe), Germany and the JRC (Joint Research Center), Petten. In the period 1991-1995, the development of new laboratory methods of co-conversion of uranium and plutonium were carried out: reverse strike co-precipitation of ADU-Pu(OH) 4 and direct denitration using microwaves. The reverse strike process produced pellets with a high sintered density, excellent micro-homogeneity and good solubility in nitric acid. Liquid wastes showed a very low content of actinides and the process is easy to operate in a glove box environment. The microwave direct denitration was optimized with uranium alone and the conditions to obtain high density pellets, with a good microstructure, without using a milling step, have been developed. At present, new experiments are being carried out to improve the reverse strike co-precipitation process and direct microwave denitration. A new glove box is being installed at the plutonium laboratory, this glove box has process equipment designed to recover scrap from previous fabrication campaigns, and to co-convert mixed U-Pu solutions by direct microwave denitration. (author)

  11. Progress of radiosterilization in the Argentine Republic

    International Nuclear Information System (INIS)

    Mariano, E.E.; Mugliaroli, H.A.

    1975-01-01

    The technological and economic advantages of radiation as a means of sterilization have led to a steady expansion of its use. With the significant increase in the radiosterilization of medical products, the health authorities have established standards for the use of radiation for that purpose. These standards will be incorporated in the next edition of the Argentine Pharmacopoeia. In general, Argentine legislation in this area is based on the IAEA's Code of Practice for Radiosterilization of Medical Products. The microbiology services of Argentina's National Atomic Energy Commission (CNEA) determine the number of viable microorganisms in each product and package the product before irradiation. The controls are carried out on random samples. At the same time, the chemistry laboratories carry out quality controls on new products which have received sterilizing doses of gamma radiation. The gas sterilization methods employed most widely in the industrial manufacture of thermolabile products involve the use of ethylene oxide or formaldehyde. The cost of this process is influenced considerably by the fact that Argentina has to import ethylene oxide. The low penetrating power of formaldehyde means that the package containing the product must still be open at the time of sterilization if an adequate safety margin is to be ensured; consequently, one needs sterile installations for the post-irradiation sealing of packages. The capital and operating coats of such installations are high. A comparison has been made of the costs of sterilizing 11000 m 3 of a product with a density of 0.1 g/cm 3 and the following relative values obtained: ethylene oxide, 399.2; formaldehyde, 947.5; gamma radiation, 166.0. Studies of the effects of sterilizing doses on certain pharmaceutical products have demonstrated that the radiosterilization of some drugs is possible. The CNEA has designed an installation for the radiosterilization of medical products; the installation would have a 500000-Ci

  12. Atomic energy and science disclosure in Cordoba

    International Nuclear Information System (INIS)

    Martin, Hugo R.

    2011-01-01

    In September 2009, considering the existing interest in public communication of scientific activities that are developed locally, a group of researchers and communicators from Córdoba, decided to form the Network of Outreach of Córdoba. Its stated objectives of the Constitutive Act are presented in this paper along with the main activities undertaken to date and plans for the future. Since that time, the Management of Institutional Relations of the CNEA in Córdoba became involved in public circulation of scientific knowledge, in what has proven to be a framework that ensures an adequate level of debate to present nuclear national activities. This will involve collaborative efforts with professional institutions involved in research, teaching and communicating science. The main objective was to encourage the transfer of knowledge to optimize available resources, improving the methodological approaches and generating creative products tailored to regional needs, in order to promote the democratization of science and nuclear technology. This paper consists of two parts. On the one hand describes the activities of the Network during the year 2011 shows results with particular emphasis on topics related to atomic energy, and secondly, shows the desirability of promoting such activities in the CNEA. Among the main actions considered, highlighting the institutional participation in the official Ministry of Science and Technology Fair participation in Science and Technology Provincial Cordoba 2011, issue of the radio program 'Green Light: Science and technology everyday life' by National Technological University Radio and a network of forty provincial stations, and active participation in the Course of Specialization in Public Communication of Science and Scientific Journalism, organized by the School of Information Sciences and the Faculty of Mathematics, Physics and Astronomy, National University of Cordoba, among others. (author) [es

  13. A PCI failure in an experimental MOX fuel rod and its sensitivity analysis

    International Nuclear Information System (INIS)

    Marino, A.C.

    2000-01-01

    Within our interest in studying MOX fuel performance, the irradiation of the first Argentine prototypes of PHWR MOX fuels began in 1986 with six rods fabricated at the α Facility (CNEA, Argentina). These experiences were made in the HFR-Petten reactor, Holland. The goal of this experience was to study the fuel behaviour with respect to PMCI-SCC. An experiment for extended burnup was performed with the last two MOX rods. During the experiment the final test ramp was interrupted due to a failure in the rod. The post-irradiation examinations indicated that PCI-SCC was a mechanism likely to produce the failure. At the Argentine Atomic Energy Commission (CNEA) the BACO code was developed for the simulation of a fuel rod thermo-mechanical behaviour under stationary and transient power situations. BACO includes a probability analysis within its structure. In BACO the criterion for safe operation of the fuel is based on the maximum hoop stress being below a critical value at the cladding inner surface; this is related to susceptibility to stress corrosion cracking (SCC). The parameters of the MOX irradiation, the preparation of the experiments and post-irradiation analysis were sustained by the BACO code predictions. We present in this paper an overview of the different experiences performed with the MOX fuel rods and the main findings of the post-irradiation examinations. A BACO code description, a wide set of examples which sustain the BACO code validation, and a special calculation for BU15 experiment attained using the BACO code, including a probabilistic analysis of the influence of rod parameters on performance, are included. (author)

  14. National law of the nuclear activity of the Argentine Republic. (Sanctioned on April 2, 1997 and partially promulgated on April 23, 1997; B.O. 25-Apr-1997)

    International Nuclear Information System (INIS)

    1997-01-01

    The Argentine National State, will establish the nuclear policy and perform the functions of research, development, regulation and supervision through two organisations, the National Atomic Energy Commission (CNEA) and the Nuclear Regulatory Authority (ARN). The National Atomic Energy Commission will continue to function as an autonomous entity, depending from the Ministry of Culture and Education of the Nation. Among the activities under its responsibility it will have to advise the National Executive Power on nuclear policy issues, promote the training of highly-specialised human resources, scientific and technological developments, execute development programs, promote programs for technological innovation, perform the responsibility for radiation waste management, etc. The Nuclear Regulatory Authority will act as an aunotomous entity in the jurisdiction of the Presidency of the Nation and will be responsible for the functions of regulation and control of the nuclear activity in everything which is related to radiological and nuclear safety, physical protection and control of the use of nuclear materials, nuclear facilities, licensing and international safeguards and give advise to the National Executive Power. Both institutions will depend from a Board of Directors composed by six members, one of which will be the Chairman and they will be responsible for the actions to comply with the objectives and functions mentioned above. In its last chapter, the law declares as subject to the privatisation the activities of nuclear energy generation presently developed by Nucleoelectrica Argentina Sociedad Anonima (NASA), as well as the Nuyclear Fuel Cycle used for the nuclear energy generation for industry or research and the Production of Radioisotopes developed by CNEA. This law revokes the articles numbers 2, 5, 9, 11, 16 and 17 of the Decree-Law N' 22.498/56 (B.O. 28-Dec-1956)

  15. Radioactive wastes. Rules governing the management. Modification of Decree No. 1.540/94 (Sanctioned 23-Sep-1998, Passed 19-Oct-1998; B.O. 23-Oct-1998)

    International Nuclear Information System (INIS)

    1998-01-01

    This law establishes for the Argentine Republic, the fundamental instruments for an adequate management of radioactive wastes, which guarantee the protection of environment, public health, and the rights of the future generations. The National State, through its National Atomic Energy Commission (CNEA), is the application authority of this law, and will have to coordinate with the provinces or the city of Buenos Aires everything related to its implementation. Also, it shall have to comply with regulatory rules referring to radiological and nuclear safety, physical and environmental protection and international safeguards set forth by the Nuclear Regulatory Authority (ARN). The generators of radioactive waste shall have to provide the necessary resources for its management and shall be responsible for the safe conditioning and storage of the waste generated by the facility operated by them, according to the conditions established by the application authority, until its transfer to the National Atomic Energy Commission. CNEA shall elaborate a Strategic Plan for Radioactive Waste Management that will include the National Programme for Radioactive Waste Management. Through this programme it shall have to: manage radioactive wastes; propose, coordinate and control research projects; promote studies for the establishment of repositories and on safety and preservation of the environment; establish procedures; implement an information and recording system of relevant documentation; inform the community; exercise the responsibility over the repositories; act in case of nuclear emergency; carry out technical and financial studies; etc. Besides, the Fund for the Management and Final Disposal of Radioactive Waste is created, with the finality of financing the above mentioned Programme. Also, it will submit annually to the National Congress a report of the activities performed, of the progress of the Strategic Plan and of its updating if necessary

  16. The dilemma of secrecy in the study of three ethnic groups from the South American Gran Chaco

    Directory of Open Access Journals (Sweden)

    Guadalupe BARÚA

    2013-12-01

    Full Text Available From an epistemological perspective, ethics poses a problem that goes beyond the issue of the stakeholders’ rationality or irrationality. Besides, it refers to the conceptual framework of knowledge, practices, and emotions allowed and forbidden within the group, as well as to their possible revelation to the researcher. This compels us to reconsider group secrets and their disclosure to the anthropologist. Undoubtedly, the resolution of this problem attempts to introduce a novel topic both concerning ethnographic fieldwork and anthropological reflection. Our examples are provided by the Wichi and Chorote Indians of the Argentine Chaco and by the Nivaclé of the Paraguayan Chaco. Secrets usually fall within the private sphere, whose meaning differs among these cultures: it may be based on a reasonable respect for intimacy, but also on the attribution of cosmological disorder that manifests the disintegration of the world. According to our experience, rubbish, body waste, corpses, or the violation of modesty as required by sexual relations attest to such disorder. Hence, all those topics associated either with Life or Death should occur not only in private but in a protected environment. We bring forward these issues by classifying secrecy into the following fields: 1 cognitive; 2 gender differences; 3 emotions; 4 offense; 5 guilt; 6 new forms of secrecy and disclosure. In this paper, the relevance of secrets is shown in unexpected situations arising from an interaction that takes place on the boundaries of standardised knowledge, and may contribute to the enhancement of anthropological knowledge while revealing unforeseen topics.

  17. Geochemical studies of Guarani ethnic groups pottery with XRF

    International Nuclear Information System (INIS)

    Facetti-Masulli, J.F.; Romero de Gonzalez, V.; Zulma de Diaz; Kump, P.

    2010-01-01

    Artefacts of pottery belonging to the Guarani ethnic group were investigated by XRF techniques. The Tupi-Guarani, is one of the three main representatives of the Neolithic culture in the Amazonian scope. Such an ethnic group dispersed towards the South; in the Paraguayan area between the Paraguay and the Parana Rivers several Guarani ethnic movements by both rivers and their tributaries are perceived. The lithology and ceramics typology have contributed to support that perception. The archaeological findings help to clarify prehistoric cultural aspects and dispersal areas. In that context, the knowledge of the chemical composition of the found ceramic devices, in particular of the rare earth elements (REE) and other refractory ones provide information on this dispersion and its expansion. Selected trace elements (Rb, Sr, Y, Zr, Nb, Ba, La, Ce, and Nd) were determined in samples from thirteen archaeological sites with XRF using an Am-241 source. Their spidergrams have allowed identifying four different sets of samples according to their areas of provenance. (author)

  18. Globalization’s unexpected impact on soybean production in South America: linkages between preferences for non-genetically modified crops, eco-certifications, and land use

    Science.gov (United States)

    Garrett, Rachael D.; Rueda, Ximena; Lambin, Eric F.

    2013-12-01

    The land use impacts of globalization and of increasing global food and fuel demand depend on the trade relationships that emerge between consuming and producing countries. In the case of soybean production, increasing trade between South American farmers and consumers in Asia and Europe has facilitated soybean expansion in the Amazon, Chaco, and Cerrado biomes. While these telecouplings have been well documented, there is little understanding of how quality preferences influence trade patterns and supply chains, incentivizing or discouraging particular land use practices. In this study we provide empirical evidence that Brazil’s continued production of non-genetically modified (GM) soybeans has increased its competitive advantage in European countries with preferences against GM foods. Brazil’s strong trade relationship with European consumers has facilitated an upgrading of the soybean supply chain. Upgraded soybean supply chains create new conservation opportunities by allowing farmers to differentiate their products based on environmental quality in order to access premiums in niche markets in Europe. These interactions between GM preferences, trade flows, and supply chain structure help to explain why Brazilian soybean farmers have adopted environmental certification programs on a larger scale than Argentinian, Bolivian, Paraguayan, and Uruguayan soybean producers.

  19. HLA polymorphism in a Guarani-Indian population from Paraguay and its usefulness for the Hispano-Indian admixture study in Paraguay.

    Science.gov (United States)

    Benitez, O; Busson, M; Charron, D; Loiseau, P

    2011-02-01

    In this study we investigated the human leucocyte antigen-A (HLA-A), -B and DRB1 polymorphism of Native American population of Paraguay, the Guarani Indians. We found that the HLA variability consisted of 5 HLA-A, 7 HLA-B and 6 HLA-DRB1 groups of alleles and of several specific alleles (B*1504, B*3505, B*3912, B*4004, B*5104, DRB1*0411, DRB1*1413) common in other Native American populations. The comparison of the HLA polymorphism of the Guaranis from Paraguay with the «Mestizos» of Paraguay and the Spaniards showed that the «Mestizos» of Paraguay are genetically very distant from the Guarani Indians of Paraguay but much more close to the Spaniards. This can be explained, at least in part, by the history of the country. Our results are of importance in transplantation, in particular in the search for an unrelated donor for a Paraguayan patient requiring hematopoietic stem cell transplantation. © 2010 Blackwell Publishing Ltd.

  20. Fostering Early Math Comprehension: Experimental Evidence from Paraguay

    Directory of Open Access Journals (Sweden)

    Emma Naslund-Hadley

    2014-11-01

    Full Text Available Research indicates that preschool children need to learn pre-math skills to build a foundation for primary- and secondary-level mathematics. This paper presents the results from the early stages of a pilot mathematics program implemented in Cordillera, Paraguay. In a context of significant gaps in teacher preparation and pedagogy, the program uses interactive audio segments that cover the entire preschool math curriculum. Since Paraguayan classrooms tend to be bilingual, the audio and written materials use a combination of Spanish and Guaraní. Based on an experimental evaluation since the program’s implementation, we document positive and significant improvements of 0.16 standard deviations in standardized test scores. The program helped narrow learning gaps between low- and high-performing students, and between students with trained teachers and those whose teachers lack formal training in early childhood education. Moreover, the program improved learning equally among both Guaraní- and Spanish-speaking students. But not all learning gaps narrowed as a result of the program. Although girls improved significantly, boys improved much more, ultimately increasing the gender gap. To close this gender gap, the program has been modified to encourage girls’ increased participation in the classroom and general interest in math

  1. de uma indústria do setor alimentício

    Directory of Open Access Journals (Sweden)

    César Renato Ferreira da Costa

    2007-01-01

    Full Text Available Pursuing opportunities is one of the few explored fields on entrepreneurship research studies. The entrepreneurial process has started from one or several individuals about one idea to be explored. Factors such as access to information and cognitive system influence such mechanism, guiding behaviors towards the creation of values. The individual’s role is extremely important for success achievement. Thus, this paper introduces an approach of pursuing opportunities according to one entrepreneur’s view. The choice of the case study was based on the innovative character of the opportunity pursued by the entrepreneur, subject of this study. This paper is framed as a case study with oral history report, through which the entrepreneurial behavior and the sense of opportunity are inferred in accordance with the production and industrialization of diet-light food. The initial process of research and development was carried out by a kind of hatching in a university in the south of Brazil, when the Stevia Rebaudian plant, found in the Brazilian and Paraguayan flora, was studied.

  2. Production Optimization of Low-Calorie Orange Nectar Using Stevioside Sweetener and Evaluation of Its Physicochemical Properties during Storage

    Directory of Open Access Journals (Sweden)

    S. Hosseini

    2015-09-01

    Full Text Available Nowadays low-calorie products are increasingly becoming popular. One of the methods to produce low-calorie food is replacement of sugar (sucrose with low-calorie sweeteners such as stevioside. This compound is isolated from the leaves of the Paraguayan plant, Stevia rebaudiana Bertoni. Since orange juice is a popular beverage with an important role in human nutrition, production of low-calorie orange nectar (containing 60% natural juice and optimization of formulation parameters using response surface methodology (RSM was the purpose of this study. Three levels of independent variables, sugar, stevioside and pectin were used to optimize formulation and two responses of brix and viscosity were evaluated. After the determination of the best formula, they were produced and stored at refrigerator (4°C and ambient (25°C temperatures for 60 days and their physicochemical properties were measured in 20 days intervals. The results showed that after 60 days of storage, stevioside content was reduced (5%. Sucrose, turbidity and viscosity were reduced during storage but brix did not indicate a notable change over the course of the study. These changes were greater at the higher storage temperature (except brix. At the end of the storage, optimal treatment had higher turbidity and total phenolic contents than the blank sample. Results showed that it is possible to produce orange nectar with 70% decrease in its sugar content by using 0.06% of stevioside and 0.03% of pectin, without any significant effects on physicochemical and sensory properties.

  3. The scientific production and the formation of the data sciences of the information of the Facultad Politécnica de la Universidad Nacional de Asunción

    Directory of Open Access Journals (Sweden)

    Emilce Noemi Sena Correa

    2017-06-01

    Full Text Available The study aims to determine the factors affecting scientific productivity and the relationship with the academic training of professors in the career of Information Sciences at the Facultad Politécnica de la Universidad Nacional de Asunción, between the years 2009-2013. The same part of the implementation of a system of questionnaires aimed at obtaining information and indicators on the potential of each country in research and teaching. The system consists of three types of questionnaires: institutional questionnaire, human resources questionnaire and questionnaire research projects. The variables studied were: researchers, professors, research projects, scientific production, functions, research, bibliometric indicators of scientific production and scientific communication. The results revealed that: that most of the teaching staff are Paraguayans grade professors (81%, and low productivity, is directly related to this segment of the population. This situation generally agrees with the university model that prevails in Paraguay, which is the "transmitter of knowledge" instead of "generating the same". Thus teaching and administrative activities take precedence over the investigative work; the lack of an adequate policy incentives, discourages research.

  4. Democracia sin ciudadanos: crítica de la teoría de la transición

    Directory of Open Access Journals (Sweden)

    Luis Ortiz Sandoval

    2006-07-01

    Full Text Available The hypothesis that the democratic forms based on the theory of “polyarchy” guarantee the processes of democratic transition in Latin America, is abstract. The continuity of the social structures of inequality in the region, demonstrates that the construction of democratic institutions is a mere pretence to “play according to the rules of the game” and establish by decree the participation of men and women through “free elections” in places in which people are not free no can they choose. This essay proposes that the question to consider is the social construction of citizenship: a still not concluded process, but becomes a condition of possibility for democracy itself. On the basis of the Paraguayan experience, it can be shown that collective actions do not necessarily point to the creation of conditions of access to citizenship, but rather to an earlier goal: the social inclusion of the lower classes.

  5. Scopadulcic acid B, a new tetracyclic diterpenoid from Scoparia dulcis L. Its structure, H+, K(+)-adenosine triphosphatase inhibitory activity and pharmacokinetic behaviour in rats.

    Science.gov (United States)

    Hayashi, T; Okamura, K; Kakemi, M; Asano, S; Mizutani, M; Takeguchi, N; Kawasaki, M; Tezuka, Y; Kikuchi, T; Morita, N

    1990-10-01

    The structure of scopadulcic acid B (2, SDB), a major ingredient of the Paraguayan herb "Typychá kuratũ" (Scoparia dulcis L.), was elucidated mainly by comparison of its spectral data with that of scopadulcic acid A (1). SDB inhibited both the K(+)-dependent adenosine triphosphatase (ATPase) activity of a hog gastric proton pump (H+, K(+)-ATPase) with a value of 20-30 microM for IC50 and proton transport into gastric vesicles. Pharmacokinetic studies of SDB in rats indicated that plasma SDB concentrations after i.v. injection of the sodium salt of SDB (SDB-Na) were described reasonably well by a two-compartment open model with Michaelis-Menten elimination kinetics. Plasma concentrations after oral administration of SDB-Na or SDB showed a much slower decline than what was expected following the i. v. study. It was suggested that the sustained plasma level of SDB after oral administration of SDB-Na or SDB was accounted for by relatively slow but efficient gastro-intestinal absorption in rats.

  6. Investigation on traditional medicines of Guarany Indio and studies on diterpenes from Scoparia dulcis.

    Science.gov (United States)

    Hayashi, Toshimitsu

    2011-01-01

    In interviews on the traditional herbal medicines of Tupi-Guarany Indians at the herbal market of Asuncion and questionnaire from their users, it was clarified that various useful medicinal plants are available in Paraguay and most of them are generally used without drying. In the search for bioactive substances from those plants, a β-glucuronidase-inhibitory diterpene called scoparic acid A (SA) was isolated from Scoparia dulcis L. together with scoparic acid B, scoparic acid C, and the aphidicolin-like tetracyclic diterpenes scopadulcic acid A (SDA) and scopadulcic acid B (SDB). HPLC analysis of diterpenes in the individual plants of Paraguayan and Asian S. dulcis revealed the presence of three chemotypes based on major component, i.e., SA type, SDB type, and SDX type containing mainly scopadiol and scopadulciol (SDC). SA and SDB were elucidated to be mainly biosynthesized in the leaves via 2-C-methyl-D-erythritol- 4-phosphate pathway, and a leaf organ culture system containing methyl jasmonate 10 µM was found to enhance the production of diterpenes by activation of Ca-signal transduction systems such as calmodulin and protein kinase C. On the other hand, SDB and SDC were found to show multifaceted pharmacological effects such as inhibitory effects on gastric acid excretion, bone resorption, replication of herpes simplex virus type 1 (HSV-1), etc. In addition, SDC was suggested to be applicable to cancer gene therapy using ganciclovir or acyclovir and the HSV-1 thymidine kinase gene called the suicide gene.

  7. Occurrence of Toxoplasma gondii antibodies in lowland tapirs maintained ex situ in Brazil and Paraguay

    Directory of Open Access Journals (Sweden)

    Maria Fernanda Naegeli Gondim

    Full Text Available ABSTRACT: Lowland Tapir ( Tapirus terrestris is the second largest South American land mammal. It is strictly herbivorous and its exposure to Toxoplasma gondii should be indicative of environmental contamination by oocysts.In the present study antibodies to T. gondii in 47 Brazilian tapirs maintained ex situ in 10 Brazilian and in one Paraguayan institution were sought in serum samples by the modified agglutination test (MAT ≥25. None of the animals presented clinical signs during the study. From 47 animals 35 (74.5% were positive with titers of 25 in 8, 50 in 6, 100 in 12, 200 in 5, 400 in 1 and 800 in 3. One animal had samples collected on twice, and 19 were born in captivity. There was no association between occurrence of T. gondii antibodies and gender, and positive animals were reported in all institutions. The high occurrence of seropositive tapirs born ininstitutions (54.3% confirmed the high exposure of these mammals to T. gondii in captivity. Only two cases ofabortion were reported, but it was not possible to correlate these abortions to T. gondii infection.

  8. Globalization’s unexpected impact on soybean production in South America: linkages between preferences for non-genetically modified crops, eco-certifications, and land use

    International Nuclear Information System (INIS)

    Garrett, Rachael D; Rueda, Ximena; Lambin, Eric F

    2013-01-01

    The land use impacts of globalization and of increasing global food and fuel demand depend on the trade relationships that emerge between consuming and producing countries. In the case of soybean production, increasing trade between South American farmers and consumers in Asia and Europe has facilitated soybean expansion in the Amazon, Chaco, and Cerrado biomes. While these telecouplings have been well documented, there is little understanding of how quality preferences influence trade patterns and supply chains, incentivizing or discouraging particular land use practices. In this study we provide empirical evidence that Brazil’s continued production of non-genetically modified (GM) soybeans has increased its competitive advantage in European countries with preferences against GM foods. Brazil’s strong trade relationship with European consumers has facilitated an upgrading of the soybean supply chain. Upgraded soybean supply chains create new conservation opportunities by allowing farmers to differentiate their products based on environmental quality in order to access premiums in niche markets in Europe. These interactions between GM preferences, trade flows, and supply chain structure help to explain why Brazilian soybean farmers have adopted environmental certification programs on a larger scale than Argentinian, Bolivian, Paraguayan, and Uruguayan soybean producers. (letter)

  9. HLA-DRB1 alleles in four Amerindian populations from Argentina and Paraguay

    Science.gov (United States)

    2009-01-01

    The major histocompatibility complex (MHC) is one of the biological systems of major polymorphisms. The study of HLA class II variability has allowed the identification of several alleles that are characteristic to Amerindian populations, and it is an excellent tool to define the relations and biological affinities among them. In this work, we analyzed the allelic distribution of the HLA-DRB1 class II locus in four Amerindian populations: Mapuche (n = 34) and Tehuelche (n = 23) from the Patagonian region of Argentina, and Wichi SV (n = 24) and Lengua (n = 17) from the Argentinean and Paraguayan Chaco regions, respectively. In all of these groups, relatively high frequencies of Amerindian HLA-DRB1 alleles were observed (DRB1*0403, DRB1*0407, DRB1*0411, DRB1*0417, DRB1*0802, DRB1*0901, DRB1*1402, DRB1*1406 and DRB1*1602). However, we also detected the presence of non-Amerindian variants in Mapuche (35%) and Tehuelche (22%). We compared our data with those obtained in six indigenous groups of the Argentinean Chaco region and in a sample from Buenos Aires City. The genetic distance dendrogram showed a clear-cut division between the Patagonian and Chaco populations, which formed two different clusters. In spite of their linguistic differences, it can be inferred that the biological affinities observed are in concordance with the geographic distributions and interethnic relations established among the groups studied. PMID:21637670

  10. The research reactor as a tool in the master in nuclear reactors in Argentina

    International Nuclear Information System (INIS)

    Notari, Carla

    2003-01-01

    Full text: The preparation of the Master in Nuclear Reactors began in 1996 in the National Atomic Energy Commission of Argentina (CNEA) with multi sectorial meetings where the necessities and perspectives of different actors of the nuclear field were discussed. This activity, performed at the Instituto de Estudios Nucleares of Ezeiza Atomic Center, culminated in 1998. In this year, in the frame of an agreement between the National Technological University and CNEA, the career was created in Buenos Aires faculty with an academic order which established the general frame and required contents. The career arised as a response to different necessities: the unsatisfied demand of specialists from the reactor projects in Buenos Aires area, the aging of CNEA's staff and an unbridged generational gap, the need of a more active participation of the University in the nuclear engineering education field. The choice of a post-grade level is considered adequate because it allows the incorporation of a great variety of professionals in different areas of Engineering, Physics, Chemistry, etc, and provides the candidates with a more flexible profile, a very desirable feature when the nuclear activity is undergoing a transition period. The career is oriented to engineers or graduated in hard sciences. It begins every two years. The activity is full time for students with fellowships. Foreign students can attend with an IAEA fellowship and local ones with CNEA's fellowships. Besides, a number of professionals, generally from the nuclear companies, not always interested in the academic degree, attend particular courses according to their necessities. This heterogeneity has allowed the students a broader interaction with argentine nuclear community. The academic plan comprises a Specialization stage lasting one year and covered by five specific courses: Reactor Physics, Thermal hydraulics, Radioprotection and Safety, Instrumentation and Control, Fuel Cycle. The second year allows to

  11. La introducción de la escala de inteligencia de Stanford-Binet en el Paraguay

    Directory of Open Access Journals (Sweden)

    José E. García

    2016-06-01

    s intelligence. These were later modified in the United States by Lewis Terman, who published the most known and influential review. In Latin America and other regions of the world the local adaptations took place at the same time. In Paraguay, the Stanford-Binet test was introduced in the decade of 1920 by the school teacher Ramón Indalecio Cardozo. He did not limit himself to an uncritical reproduction, but realized some modifications to adapt the scale to the local culture and improve its reliability. This article studies the introduction of the Stanford-Binet test to the general context of the Paraguayan education and Cardozo's adaptations. To achieve this, we proceed to a review of primary and secondary sources, putting ideas and concepts in its correct historical context. It also contributes to extend previous papers focused on the author’s works and Paraguayan psychology during the pre-university period.

  12. Optimization of irrigation water in stone fruit and table grapes

    Science.gov (United States)

    de la Rosa, Jose Mª; Castillo, Cristina; Temnani, Abdel; Pérez-Pastor, Alejandro

    2017-04-01

    In water scarcity areas, it must be highlighted that the maximum productions of the crops do not necessarily imply maximum profitability. Therefore, during the last years a special interest in the development of deficit irrigation strategies based on significant reductions of the seasonal ET without affecting production or quality has been observed. The strategies of regulated deficit irrigation (RDI) are based on the reduction of water supply during non critical periods, the covering of water needs during critical periods and maximizing, at the same time, the production by unit of applied water. The main objective of this experiment was to implement, demonstrate and disseminate a sustainable irrigation strategy based on deficit irrigation to promote its large scale acceptance and use in woody crops in Mediterranean agroecosystems, characterized by water scarcity, without affecting the quality standards demanded by exportation markets. Five demonstration plots were established in representative crops of the irrigating community of Campotejar (Murcia, Spain): i) Peach trees, cv. catherina in the "Periquitos" farm; ii) Apricot trees, cv. "Red Carlet" in "La Hoya del Fenazar" farm; iii) Nectarine trees, cv. Viowhite in "Agrícola Don Fernando" farm; iv) Table grape, cv "Crimson Seedless" in "La Hornera" farm; and v) Paraguayan cv. carioca in "The Hornera" farm. In each demonstration plot, at least two irrigation treatments were established: i) Control (CTL), irrigated to ensure non-limiting water conditions (120% of crop evapotranspiration) and ii) Regulated deficit irrigation (RDI) irrigated as CTL during critical periods and decreasing irrigation in non-critical periods. The plant water status indicators evaluated were midday stem water potential and Trunk Diameter Fluctuation derived indices: maximum daily shrinkage (MDS) and trunk daily growth rate (TGR); vegetative growth of the different crops from trunk diameter and pruning dry weight, fruit growth and fruit

  13. Operators retraining in RA-1

    International Nuclear Information System (INIS)

    Pereira, R; Daoud, A

    2012-01-01

    The nuclear activity in Argentina has its foundational milestone in the creation of the Comision Nacional de EnergIa Atomica in 1950. Achievements since then, linked to the area of nuclear reactors and nuclear fuel materials, fuel cycle facilities and the applications of nuclear technology in medicine, industry, agriculture, food preservation, environmental studies and many others, have relied on personnel trained in this specific technology in both professional and technical level. This training has been done in most cases in the exclusive scope of CNEA. Eventually CNEA has been linked with the University to ensure that personnel training concerned to work done in the nuclear field had guarantees of formality and excellence. The creation of the Instituto de Tecnologia Nuclear Dan Beninson that, under an agreement with the Universidad Nacional de General San Martin, has set up an enabling environment for the training of professionals and university technicians to serve with the multiple and growing use of this technology. On the other hand the Institute has been issuing, along with its careers, specialized courses that, in some cases, have been requested by CNEA's nuclear installations and companies related to the nuclear sector. In particular, the Specialization in Nuclear Reactors and its Fuel Cycle (ERCC) and the Courses of Introduction to Nuclear Technology-Complementary training for Installations Personnel Class I (CI-CC), this last, recognized by the ARN as a requirement for applying to the individual licensing examination, providing work experience in the RA-1 reactor among which we can find commissioning, control rods calibration by various methods and calculations of reactivity. With this practical framework developed in the RA-1 and the academic support provided by the Instituto de Tecnologia Nuclear Dan Beninson it was developed a training program for nuclear reactors operators. Let us stress that this research reactor has been forming generations

  14. Ni explotación ni utopía: un proyecto ilustrado en el corazón de América del Sur

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    Aguerre Core, Fernando

    2011-12-01

    Full Text Available In the twilight of Spanish rule in South America, metropolitan authorities sought for solutions to the Guarani Indians «reducciones» which were languishing after the Jesuits’expulsion. The proposed plans were not accomplished, mainly due to the sloth of royal bureaucrats, or because they were not real solutions to the problem. One of the most comprehensive studies on the matter was the «Informe» of viceroy marqués de Avilés, who in 1800 made a detailed study of the once prosperous Paraguayan missions. Moreover, he proposed a definitive solution which consisted in the abolition of communal property among the natives through the institutionalization of individual property and the recognition of the personal rights of the natives.

    En las décadas finales del gobierno espanol en América del Sur, las autoridades metropolitanas alentaron la búsqueda de soluciones para las antiguas reducciones de Indios Guaraníes que languidecían después de la expulsión de los Jesuitas. Los planes propuestos se malograron por la desidia de los funcionarios o la falta de realidad de esas medidas. Uno de los estudios más completos emprendidos con ese propósito fue el «Informe» realizado en el ano 1800 por el virrey del Río de la Plata, marqués de Avilés, en el que aparece una historia circunstanciada de las que antano habían sido prósperas misiones del Paraguay. Este texto, asimismo, propone una solución definitiva al problema, que consistía en la abolición del régimen de comunidad entre los indígenas con el establecimiento de la propiedad individual y el reconocimiento de sus derechos personales.

  15. Looking from above: saying and doing in the history museums of Latin America

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    Marisa González de Oleaga

    2011-03-01

    Full Text Available What functions might the history museum fulfill in the twenty-first century? How could this powerful ideological device, so closely linked in its origins to the nation-state and neo-colonial expansion, be changed into an instrument of multicultural citizenship? In some Latin American museums, new historical subjects and audio-visual media have been incorporated into the exhibits. But, is that enough? We do not believe so, because things are said in a museum, but things are also done while speaking: reality is ordered, evaluated and hierarchized, so that a certain way of conceiving and being in the world is conveyed. Therefore, making the museum suitable to the new needs of the community demands changes not only in what is said, but also in the way it is said. It serves little to incorporate new social subjects (the native peoples of Latin America, for example if this inclusion results from a pejorative conception of these communities, which is just what happens in the Museum of America in Madrid, where the Spanish appear as masters of the word while the indigenous people are represented by ceramic vessels. If, in the accounts of the museums, the part continues to be taken for the whole by essentializing and naturalizing the difference, then those other social subjects must appear to be merely a historical afterthought. It seems to us that the performative dimension of the discourse in the museum is a very important aspect at the moment its function in the new global society is evaluated. We propose two objectives for new museums: serving the purposes of multicultural coexistence, and being spaces where the subjects may examine their social situation. In order to do this, we have analyzed the setup of three museums: a colonial museum (the Museum of America in Madrid, a national museum (the National Historical Museum in Buenos Aires, and an ethnic museum (the Mennonite Jacob Unger Museum in the Paraguayan Chaco.

  16. Chagas disease: national survey of seroprevalence in children under five years of age conducted in 2008.

    Science.gov (United States)

    Russomando, Graciela; Cousiño, Blanca; Sanchez, Zunilda; Franco, Laura X; Nara, Eva M; Chena, Lilian; Martínez, Magaly; Galeano, María E; Benitez, Lucio

    2017-05-01

    Since the early 1990s, programs to control Chagas disease in South America have focused on eradicating domiciliary Triatoma infestans, the main vector. Seroprevalence studies of the chagasic infection are included as part of the vector control programs; they are essential to assess the impact of vector control measures and to monitor the prevention of vector transmission. To assess the interruption of domiciliary vector transmission of Chagas disease by T. infestans in Paraguay by evaluating the current state of transmission in rural areas. A survey of seroprevalence of Chagas disease was carried out in a representative sample group of Paraguayans aged one to five years living in rural areas of Paraguay in 2008. Blood samples collected on filter paper from 12,776 children were tested using an enzyme-linked immunosorbent assay. Children whose serology was positive or undetermined (n = 41) were recalled to donate a whole blood sample for retesting. Their homes were inspected for current triatomine infestation. Blood samples from their respective mothers were also collected and tested to check possible transmission of the disease by a congenital route. A seroprevalence rate of 0.24% for Trypanosoma cruzi infection was detected in children under five years of age among the country's rural population. Our findings indicate that T. cruzi was transmitted to these children vertically. The total number of infected children, aged one to five years living in these departments, was estimated at 1,691 cases with an annual incidence of congenital transmission of 338 cases per year. We determined the impact of vector control in the transmission of T. cruzi, following uninterrupted vector control measures employed since 1999 in contiguous T. infestans-endemic areas of Paraguay, and this allowed us to estimate the degree of risk of congenital transmission in the country.

  17. Chagas disease: national survey of seroprevalence in children under five years of age conducted in 2008

    Directory of Open Access Journals (Sweden)

    Graciela Russomando

    Full Text Available BACKGROUND Since the early 1990s, programs to control Chagas disease in South America have focused on eradicating domiciliary Triatoma infestans, the main vector. Seroprevalence studies of the chagasic infection are included as part of the vector control programs; they are essential to assess the impact of vector control measures and to monitor the prevention of vector transmission. OBJECTIVE To assess the interruption of domiciliary vector transmission of Chagas disease by T. infestans in Paraguay by evaluating the current state of transmission in rural areas. METHODS A survey of seroprevalence of Chagas disease was carried out in a representative sample group of Paraguayans aged one to five years living in rural areas of Paraguay in 2008. Blood samples collected on filter paper from 12,776 children were tested using an enzyme-linked immunosorbent assay. Children whose serology was positive or undetermined (n = 41 were recalled to donate a whole blood sample for retesting. Their homes were inspected for current triatomine infestation. Blood samples from their respective mothers were also collected and tested to check possible transmission of the disease by a congenital route. FINDINGS A seroprevalence rate of 0.24% for Trypanosoma cruzi infection was detected in children under five years of age among the country’s rural population. Our findings indicate that T. cruzi was transmitted to these children vertically. The total number of infected children, aged one to five years living in these departments, was estimated at 1,691 cases with an annual incidence of congenital transmission of 338 cases per year. MAIN CONCLUSION We determined the impact of vector control in the transmission of T. cruzi, following uninterrupted vector control measures employed since 1999 in contiguous T. infestans-endemic areas of Paraguay, and this allowed us to estimate the degree of risk of congenital transmission in the country.

  18. Commissioning and start-up of RA-8 critical assembly

    International Nuclear Information System (INIS)

    Lorenzo, N. de; Diaz, C.; Facchini, G.; Fernandez, C.; Fittipaldi, A.; Juracich, R.; Levanon, I.; Manceda, J.; Martinez, J.; Mogdan, R.; Perez, J.; Scarnichia, E.; Blaumann, H.; Gennuso, G.; Scotti, G.

    1999-01-01

    The RA-8 critical assembly was designed as one of the experimental facilities for the CAREM Reactor Project. This paper describes the activities developed during the cold and hot commissioning, pointing out the difficulties and the solutions applied (some of them original ones). Moreover, this paper will show the main features of the newest nuclear installation of CNEA making a brief description of its characteristics. Among the special circumstances related to the commissioning that are described in the paper we can mention the following: 1. The facility shares the building with the Thermohydraulic Assay Laboratory (L.E.T.), another experimental facility of CAREM, and thus some shared systems have already been working for many years before this start up. Special procedures for these systems were designed to verify the proper functioning under the new requirements. 2. A new driving mechanism, based in hydraulic cylinders, was used to move the control rods. The criteria for acceptance and a validation of the procedure completeness have been carried out. 3. The implementation of a power measurement system based in neutron noise. 4. Measurement of Power Distribution using direct gamma counting from the fuel elements. 5. The commissioning was interrupted for a ten-month period because the personnel involved had to carry out the commissioning of the Egyptian Research Reactor 2. Also, the common activities during a commissioning are described, pointing out the major steps carried out and the results obtained. The following are examples of these activities: 1. Environmental dose survey (before fuel loading and during other stages). 2. Test of equipment and systems isolated from the rest of the plant. 3. Integrated system test (two or more systems working at the same time). 4. Start-up and power operation simulations before fuel loading. 5. Fuel loading strategy during the approximation to criticality by mass. 6. Modification of systems' components to improve the

  19. Evaluation of the international limitations and conditions of the Argentinian nuclear politics

    International Nuclear Information System (INIS)

    Martin, Hugo R.

    2003-01-01

    It is a broadly accepted fact that the Argentine Republic is one of the few development countries that has reached an advance status in the world in pacific applications of nuclear science and technology. A retrospective vision of the main technical and political aspects that characterized the process to global scale allows to confirm, starting from the theory of the International Relations, that the position reached by the country was the consequence of a coherent effort sustained under the almost exclusive conduction of the National Atomic Energy Commission (CNEA). The Nuclear politics of Argentine in the international concert during the last fifty years, sample a behavior of non adhesion to the juridical treaties commitments that were considered limitative for the initial objectives proposed when President General J. D. Peron created the CNEA in 1950: self-sufficiency and national autonomy. This continuity shows an unusual coherence in the foreign policy of the country maintained by all the governments that exercised the power during five decades. The result of this investigation task has allowed to elaborate a complex, reasonably coherent vision of the consequences that the limitations and conditions on the Argentine nuclear politics had in the three temporary dimensions and in different levels. From the theoretical point of view, the scenario starts from the crisis of the Utopism that revaluate the Classic Realism (H. Morgenthau) after the Second World War. In the next stage K. Waltz's Structural Realism starts when the internationalization process of the nuclear technology begins in the 50. Other theoretical models: Complex Interdependence (R. Keohane and J. Nye) and Peripheric Realism (C. Escude) at local level seem to be the representative models to describe the Argentine political behavior in the nuclear politic and to prove that the main variable in this field was the genuine domain of the scientific and technological knowledge developed in the national

  20. International Uranium Resources Evaluation Project (IUREP) national favourability studies: Argentina

    International Nuclear Information System (INIS)

    1977-08-01

    Argentina is a predominantly lowland area of 2,789,240 square kilometers. The capital is Buenos Aires. The entire length of Argentina is bordered on the west by the Andes Mountains. Tile Northwest Andes-Piedmont region consists of deep valleys containing salt basins and volcanoes, and is an earthquake zone. Patagonia, in the south, is essentially an arid region of windy plateaus and valleys. The southern Andes are narrower and lower than the northern Andes and in the extreme south contain glaciers and ice fields. The east-central plain (Pampa) of Argentina has dry and humid sectors and contains most of the population. The largest rivers are chiefly in the northeast, many having only seasonal flow. There has been extensive surface and subsurface exploration for uranium in Argentina for over 20 years. Although most of the work has been performed by the CNEA, advisors from the U.S. and from the IAEA have also taken part. Private industry has been involved, but apparently only on a small scale. In the OECD report of 1970, it was stated that 400,000 square kilometers of Argentina appear very favorable for uranium while an additional 900,000 square kilometers offer fair possibilities. Uranium exploration to date suggests that sandstones of Permian and Cretaceous ages exposed in Western Argentina in the Cordillera are very promising for discovery of new deposits. Past CNEA estimates have indicated that there is considerable hope for new discoveries in those areas where reserves are now known. In addition to the known uraniferous provinces which are indeed favorable for further exploration, there are several other large areas that warrant attention. There are, for example, in the Santa Cruz area of about 15,500 square kilometers Cretaceous and Tertiary sediments with favorable facies for uranium deposition. In the Patagonia Cordillera, Jurassic, Cretaceous, and Tertiary sediments are of interest for prospecting, These rocks contain carbonaceous material and have been

  1. 180 meteorological stations data analysis to find out a meteodiffusivity index of sites; Analisi dei dati relativi a 180 stazioni meteorologiche al fine di individuare un indice per la caratterizzazione meteodiffusiva dei siti

    Energy Technology Data Exchange (ETDEWEB)

    Cagnetti, P.; Grandoni, G.; Mammarella, M.C.; Pellegrini, A.; Racalbuto, S.; Boccadoro, M.; Fedele, P. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

    1999-07-01

    The present work has been done during the preparatory events of the National Conference on Energy and Environment (CNEA), studying the diffusive properties of the lower layers of the atmosphere, in order to find out a set of air quality indicators for urban areas. The data of 180 meteorological stations of the Italian Air Force Meteorological Service cover the whole Italian territory and are easily available; for this reason, this study, is based on those data. By analysing the available data, the variability range of the considered parameters was investigated and then an attempt was done to combine those parameters in order to describe, with a general index related to each site, the higher or lower attitude to diffuse pollutants released in the atmosphere. After that, the sites have been classified by their capacity of dispersion in atmosphere, making use of the meteo-diffusivity index described above, and pointing out the importance of meteorology in the study of the air quality of urban sites. [Italian] Questo lavoro e' stato svolto durante gli eventi preparatori della Conferenza Nazionale Energia Ambiente (CNEA), con lo scopo di individuare un set di indicatori della qualita' dell'aria in aree urbane, sulla base di studi e ricerche sui parametri meteodiffusivi dei bassi strati dell'atmosfera. Sono stati presi in considerazione, perche' subito fruibili e a diffusione nazionale, i dati provenienti dalle 180 stazioni meteorologiche dell'Areonautica Militare. Dopo un'analisi di tali dati al fine di individuare l'intervallo di variabilita' dei parametri meteorologici presi in considerazione, e' stata proposta una combinazione di tali parametri in grado di descrivere, sotto forma di un indice generale ed in relazione a tutti i siti considerati, la maggiore o minore tendenza alla diffusione degli inquinanti immessi in atmosfera. Sulla base di tale definizione di un indice di meteodiffusivita', sono stati

  2. Using Benthic microalgae to asses groundwater ecological status

    International Nuclear Information System (INIS)

    Tolivia, Analia A.; Kundt, Mirian S.; Iglicki, A.

    2009-01-01

    The water resources have been evaluated for a long time by physicochemical parameters. These provide timely results and do not reveal much about the evolution of a pollutant load and resilient and buffering capacity of aquatic ecosystems. Techniques based on the evaluation of sensitivity index of living organisms in the presence of different impacts have been developed as an alternative to these procedures. Biological indicator species are unique environmental indicators as they offer a signal of the biological condition in a watershed. The use of bio indicators as an early warning of pollution or degradation in an ecosystem can help sustain critical resources. While indicator species is a term that is often used, it is somewhat inaccurate. Indicators are actually groups or types of biological resources that can be used to assess environmental condition. Within each group, individual species can be used to calculate metrics in an effort to assess water quality conditions. Aquatic invertebrates and microalgae are the two groups recommended in evaluations of water quality, both are required by DMA 2000. The aim of this study was to evaluate two water bodies to choose the most appropriate group of microalgae to use as a biological indicator and establish the proposed rates that adjust better to describe the ecological quality of waters in the ecoregions where are the sites of CNEA. Surveys were carried out for this recognition of environments in the Ezeiza Atomic Center (CAE) and the industrial mining complex Los Gigantes, phytobenthos samples were taken in three sites in the Ezeiza Atomic Center (CAE) and the industrial mining complex Los Gigantes, Cordoba. Water samples were collected for later determination of chlorophyll content and biomass estimation. Determination of microalgal species were carried out and established those most representative groups. From that observation diatoms were selected as best represented in both sites. Some of the genera found in the

  3. Study of a neutron producing target via the 7Li(p,n)7Be reaction near its energy threshold for BNCT (boron neutron capture therapy)

    International Nuclear Information System (INIS)

    Burlon, Alejandro; Kreiner, Andres J.; Debray, Mario E.; Stoliar, Pablo; Kesque, Jose M.; Naab, Fabian; Ozafran, Mabel J.; Schuff, Juan; Vazquez, Monica; Caraballo, Maria E.; Valda, Alejandro; Somacal, Hector; Davidson, Miguel; Davidson, Jorge

    2000-01-01

    In the framework of Accelerator Based BNCT (AB-BNCT) the 7 Li(p,n) 7 Be reaction near its energy threshold is one of the most promising. In this work a thick LiF target irradiated with a proton beam was studied as a neutron source. The 1.88-2.0 MeV proton beam was produced by the tandem accelerator TANDAR at CNEA's facilities in Buenos Aires. A water-filled phantom, containing a boron sample was irradiated with the resulting neutron beam. The boron neutron capture reaction produces a 0.478 MeV gamma ray in 94 % of the cases. The neutron yield was monitored by detecting this gamma ray using a germanium detector with an 'anti-Compton' shield. Moreover, the thermal neutron flux was evaluated at different depths inside the phantom using bare and Cd-covered gold foils. A maximum neutron thermal flux of 1.4 x 10 8 1/(cm 2 -s-mA) was obtained at 4.2 cm from the phantom surface. (author)

  4. Argentina [Country report

    International Nuclear Information System (INIS)

    Ferreyra, R.

    2005-01-01

    The airborne geophysical surveys developed in Argentina are described. They have got more than 500.000 km 2 acquiring data for U, Th, K and total background activity. Other types of published data are also mentioned (satellite imagery, seismic hazard, climate, soil distributions, etc.). The availability of maps with the abundances of elements analyzed at the country and also at laboratories from Canada is described, as well as data of analysis of several elements at two study areas proposed at the outset of the project. The availability of process rate data and epidemiological data is also explained. Argentina intended fully to participate in the CRP at the outset of the project. Due, however, to external resource constraints imposed on the participating organization (Comision Nacional de Energia Atomica, CNEA), the level of participation had to be significantly reduced. Nonetheless, in the first period of the CRP, Argentina undertook to collate existing geological and geochemical information within the country, and began to define potential areas for site specific natural systems safety indicator studies. (author)

  5. A short history of nuclear activities in Mendoza province

    International Nuclear Information System (INIS)

    Lardone, Leo E.

    2005-01-01

    Uranium was found in Mendoza in 1946 in 'Soberania' and 'Independencia' mines. After its creation in 1950 CNEA, together with Cuyo National University (UNC), developed the mining industry starting with the 'Papagayos' mine. It can be considered the beginning of the systematic exploitation of uranium in the country. In course of time the province of Mendoza passed to get one of the most uraniferous reserve of Argentina and it has accumulated the major production till now. However, in the last years there has been opposition to resume the production in the Sierra Pintada Uranium Manufacturing Complex. There was also a powerful land continuous progress in the field of no energetic applications of nuclear techniques in the province. The most outstanding example is the 'School of Nuclear Medicine Foundation', with installations in Mendoza city and in San Rafael. Besides, there is a research and development group in Cuyo National University devoted to the Nuclear Safety. Finally, we can not fail to mention the Auger Pierre Project, which is building in Malargue an observatory for the study of the cosmic rays. (author) [es

  6. Nuclear power plant life management: flow accelerated corrosion and chemical control. Application to Embalse Nuclear power plant

    International Nuclear Information System (INIS)

    Chocron, Mauricio; Saucedo, Ramona E.; Sainz, Ricardo A.; Ovando, Luis E.

    2006-01-01

    The chemistry of a water-steam cycle is one of the main aspects of the Plant Life Management of a Nuclear Power Plant and it is important for the preservation, efficiency and availability of the whole system. In that sense this aspect has to be prioritized in any study whose aim is the life extension of the plant. In particular, the flow-assisted -corrosion or FAC is a problem that worldwide has been considered important due to the piping wall thinning that in some occasions has led to severe accidents. The FAC phenomena is not easy to be interpreted and addressed although nowadays there are some accepted models to understand and predict sensitive areas of the cycle. The objectives of the present paper have been: a) The construction of an integrated code that involves all the aspects that have influence on FAC, i.e., materials, composition, geometry, temperature and flow rate, quality, chemistry, etc.; b) Establish or adapting current models to the circuit of Embalse PHWR NPP; c) Identify new locations for inspection and wall thickness measurement in order to predict residual life; d) Compare different chemistries and e) handle large sets of inspection data. Among the results, new lines have been incorporated to the inspection schedule of the 2005' programmed outage. Also, the evaluation is part of the PLIM-PLEX programme at Embalse-N.A.S.A. in collaboration with C.N.E.A. is being carried out. (author)

  7. International ministerial conference on nuclear energy in the 21st century. Presentations

    International Nuclear Information System (INIS)

    2009-01-01

    The International Ministerial Conference on Nuclear Energy in the 21st Century was held in Beijing, China, from 20 to 22 April 2009, attended by ministers, high-ranking officials and experts from 61 States and 7 international organizations, with a total of 808 participants and observers. This conference was organized by the International Atomic Energy Agency (IAEA), hosted by the Chinese Government through the China Atomic Energy Authority (CAEA), and co-sponsored by the Nuclear Energy Agency (NEA) of OECD and the China Nuclear Energy Association (CNEA). Its aim was to review the status and the prospects of nuclear energy, including the evolution of technology, and offer a forum for many countries considering the potential benefits of adding nuclear power to the energy mix. A wide range of issues has been covered during the three days' conference, including energy resources and the environment, technology available now and in the future, infrastructure development, reliable fuel supply, spent fuel and waste management. The participants exchanged views on the future role of nuclear energy by presentations, discussions and consultations. There was a broad convergence of views among participants. The goal of the conference has been achieved

  8. Criticality analysis of the CAREM-25 reactor irradiated fuel elements storage pool

    International Nuclear Information System (INIS)

    Albornoz, A.F.; Jatuff, F.E.; Gho, C.J.

    1993-01-01

    A criticality safety analysis of the irradiated fuel element pool storage of the CAREM-25 reactor was performed. The CAREM project is property of the Comision Nacional de Energia Atomica (CNEA) of Argentine, and it is being executed by INVAP S.E. difficult evaluation of the CAREM core (relatively high -3,4%- enriched U O 2 , Gd 2 O 3 burnable absorber in different densities, or criticality achievement with as few as 7 fuel elements is inherited by the pool storage. The lattice code CONDOR 1.1 was used for investigating the problem scene, and some results compared on the Monte Carlo codes MONK 5.0 and MONK 6.3. Circular and square tubes of 304-L stainless steel, borated steel and boral B 4 C in Al) were tested as suitable channels for fuel element containment, in square and hexagonal arrays; in addition, burnup, burnable absorber concentration, Sm and leakage credits were determined. It was found that the critical is strongly dependent on the separation of the fuel elements in the pool. Out-of-nominal conditions were investigated too, showing that the loss of coolant and the change in temperature and density conditions in the storage lead to an increase in reactivity, but the system's reactivity remains near the safety limits. (author)

  9. Study of supersaturation of defects under neutron irradiation by Zener relaxation

    International Nuclear Information System (INIS)

    Gonzalez, Hector C.; Justus, Francisco J.W.

    2004-01-01

    Vacancy supersaturation in dynamic equilibrium under fast neutron irradiation could be determined by anelastic relaxation. This phenomenon is particularly noticeable in some substitutional binary alloys. Relaxation is due to the reordering of atoms pairs under a stress, being a local reordering at the atomic scale. Relaxation time (τ) is inversely proportional to the vacancy concentration (Cv) and decreases under irradiation because a dynamical equilibrium of vacancy concentration, higher than thermodynamic equilibrium, is established. Theoretical models allow estimating the magnitude of that supersaturation. Determinations of τ at different temperatures, with and without fast neutron irradiations, were made with an 'in situ' device placed in the high temperature loop in the RA1 CAC-CNEA reactor. An alloy Au-30% Ni was used, since it presents an appreciable Zener effect. The measurements were performed in a spring-shaped specimen in order to minimize temperature and flux gradients. An Arrhenius plot of τ was obtained, and it was observed that for temperatures lower than 220 C degrees a vacancy supersaturation exists. The lowest temperature of our experiments was 190 C degrees. A value of τ at this temperature was three times lower under irradiations. A plot of τ vs. fast neutron fluence (φ f t) at the irradiation temperature T= 203 C degrees was obtained. An increase of τ was observed. After an annealing at T = 280 C degrees, the value of τ recovers the value corresponding to the unirradiated case. This fact suggests that the loops produced by irradiation act as defect sinks. (author) [es

  10. DART-TM: A thermomechanical version of DART for LEU VHD dispersed and monolithic fuel analysis

    International Nuclear Information System (INIS)

    Saliba, Roberto; Taboada, Horacio; Moscarda, Ma.Virginia; Rest, Jeff

    2003-01-01

    A collaboration agreement between ANL/USDOE and CNEA Argentina, in the area of Low Enriched Uranium Advanced Fuels has been in place since October 16, 1997 under the 'Implementation Arrangement for Technical Exchange and Cooperation in the Area of Peaceful Uses of Nuclear Energy'. An annex concerning DART code optimization has been operative since February 8, 1999. Previously, as a part of this annex a visual thermal FASTDART version was developed that includes mechanistic models for the calculation of the fission-gas-bubble and fuel particle size distribution, reaction layer thickness, and meat thermal conductivity. FASTDART was presented at the last RERTR Meeting that included validation against RERTR 3 irradiation data. The thermal FASTDART version was assessed as an adequate tool for modeling the behavior of LEU U-Mo dispersed fuels under irradiation against PIE RERTR irradiation data. During this past year the development of a 3-D thermo-mechanical version of the code for modeling the irradiation behavior of LEU U-Mo monolithic and dispersion fuel was initiated. Some preliminary results of this work will be shown during RERTR-2003 meeting. (author)

  11. Thermomechanical DART code improvements for LEU VHD dispersion and monolithic fuel element analysis

    International Nuclear Information System (INIS)

    Taboada, H.; Saliba, R.; Moscarda, M.V.; Rest, J.

    2005-01-01

    A collaboration agreement between ANL/US DOE and CNEA Argentina in the area of Low Enriched Uranium Advanced Fuels has been in place since October 16, 1997 under the Implementation Arrangement for Technical Exchange and Cooperation in the Area of Peaceful Uses of Nuclear Energy. An annex concerning DART code optimization has been operative since February 8, 1999. Previously, as a part of this annex a visual FASTDART version and also a DART THERMAL version were presented during RERTR 2000, 2002 and RERTR 2003 Meetings. During this past year the following activities were completed: Optimization of DART TM code Al diffusion parameters by testing predictions against reliable data from RERTR experiments. Improvements on the 3-D thermo-mechanical version of the code for modeling the irradiation behavior of LEU U-Mo monolithic fuel. Concerning the first point, by means of an optimization of parameters of the Al diffusion through the interaction product theoretical expression, a reasonable agreement between DART temperature calculations with reliable RERTR PIE data was reached. The 3-D thermomechanical code complex is based upon a finite element thermal-elastic code named TERMELAS, and irradiation behavior provided by the DART code. An adequate and progressive process of coupling calculations of both codes at each time step is currently developed. Compatible thermal calculation between both codes was reached. This is the first stage to benchmark and validate against RERTR PIE data the coupling process. (author)

  12. Deep geological disposal research in Argentina

    International Nuclear Information System (INIS)

    Ninci Martinez, Carlos A.; Ferreyra, Raul E.; Vullien, Alicia R.; Elena, Oscar; Lopez, Luis E.; Maloberti, Alejandro; Nievas, Humberto O.; Reyes, Nancy C.; Zarco, Juan J.; Bevilacqua, Arturo M.; Maset, Elvira R.; Jolivet, Luis A.

    2001-01-01

    Argentina shall require a deep geological repository for the final disposal of radioactive wastes, mainly high-level waste (HLW) and spent nuclear fuel produced at two nuclear power plants and two research reactors. In the period 1980-1990 the first part of feasibility studies and a basic engineering project for a radioactive high level waste repository were performed. From the geological point of view it was based on the study of granitic rocks. The area of Sierra del Medio, Province of Chubut, was selected to carry out detailed geological, geophysical and hydrogeological studies. Nevertheless, by the end of the eighties the project was socially rejected and CNEA decided to stop it at the beginning of the nineties. That decision was strongly linked with the little attention paid to social communication issues. Government authorities were under a strong pressure from social groups which demanded the interruption of the project, due to lack of information and the fear it generated. The lesson learned was: social communication activities shall be carried out very carefully in order to advance in the final disposal of HLW at deep geological repositories (author)

  13. Assistance in chemistry and chemical processes related to primary, secondary and ancillary systems of nuclear power plants

    International Nuclear Information System (INIS)

    Chocron, Mauricio A.; Becquart, Elena T.; Iglesias, Alberto M.; La Gamma, Ana M.; Villegas, Marina

    2003-01-01

    Argentina is currently running two nuclear power plants: Atucha I (CNA I) and Embalse (CNE) operated by Nucleoelectrica Argentina (NASA) whereas the National Atomic Energy Commission (CNEA), among other activities, is responsible for research and development in the nuclear field, operates research reactors and carries out projects related to them. In particular, the Reactor Chemistry Section personnel (currently part of the Chemistry Dept.) has been working on the field of reactor water chemistry for more than 25 years, on research and support to the NPPs chemistry department. Though the most relevant tasks have been connected to primary and secondary circuits chemistry, ancillary systems show along the time unexpected problems or feasible improvements originated in the undergoing operating time as well as in phenomena not foreseen by the constructors. In the present paper are presented the tasks performed in relation to the following systems of Embalse NPP: 1) Heavy water upgrade column preliminary water treatment; 2) Liquid waste system preliminary water treatment; and 3) Primary heat transport system coolant crud composition. (author)

  14. Organisation of the National Atomic Energy Commission. Decree-Law N` 22.498 (19-Dec-1956; B.O. 28-Dec-1956). Ratified by Law 14.467/58; Organizacion de la Comision Nacional de Energia Atomica. Decreto-Ley N` 22.498 (19-dic-1956; B.O. 28-dic-1956). Ratificada por Ley 14.467/58

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1957-12-31

    Organization of the National Atomic Energy Commission of the Argentine Republic. Organic law through which this institution shall function as an autonomous entity, empowered to act publicly and privately in scientific, technical, industrial, commercial, administrative and financial matters. Its purposes will be the scientific and industrial promotion, execution, research and application of nuclear transmutations. Also to control the applications of nuclear energy for reasons of public usefulness in order to prevent the damages they could cause. It establishes that the CNEA will be administered by a Board of Directors composed by a Chairman and five members, who will have attributions and duties such as advise the Executive Power of the Argentine Republic in matters related to the atomic energy and their applications and the necessary precautions for the protection against atomic dangers. This Board of Directors will need the authorization of the Executive Power to undertake some activities such as the exportation of nuclear materials or enter into contracts and agreements with societies with the Argentine provinces for the exploitation of nuclear deposits and mines.

  15. Calibration of extremity dosemeters for gamma radiation fields

    International Nuclear Information System (INIS)

    Papadopulos, S.B.; Gregori, B.N.; Cruzate, J.A.

    1998-01-01

    In this work the kerma conversion factor are free in air, dose equivalent H(d,0 ) are presented, they were obtained theoretical and experimentally in finger and arm for gamma radiation fields. Extremity dosemeters put on surface finger and arm phantom have been irradiated. The finger phantom is a solid cylinder of PMMA polymethylmethacrylate 19 mm diameter and 300 mm height. The arm phantom is a 73 mm external diameter cylinder with PMMA walls 2.5 mm thick fill with water and 300 mm height. The radiation sources were cobalt 60 and cesium 137 from the Regional Center of Reference (CRR) of the National Commission of Atomic Energy (CNEA) and the Nuclear Regulatory Authority (ARN). Also in ISO wide X ray spectra W60, W110 and W200 have been irradiated. The results obtained show a good correlation with those published, they have a difference less than 7%. The factors will be applied to the evaluation of the equivalent doses coming from workers whose main irradiated zone is in the hands. (author)

  16. Standardization of Ga-68 by coincidence measurements, liquid scintillation counting and 4πγ counting

    International Nuclear Information System (INIS)

    Roteta, Miguel; Peyres, Virginia; Rodríguez Barquero, Leonor; García-Toraño, Eduardo; Arenillas, Pablo; Balpardo, Christian; Rodrígues, Darío; Llovera, Roberto

    2012-01-01

    The radionuclide 68 Ga is one of the few positron emitters that can be prepared in-house without the use of a cyclotron. It disintegrates to the ground state of 68 Zn partially by positron emission (89.1%) with a maximum energy of 1899.1 keV, and partially by electron capture (10.9%). This nuclide has been standardized in the frame of a cooperation project between the Radionuclide Metrology laboratories from CIEMAT (Spain) and CNEA (Argentina). Measurements involved several techniques: 4πβ−γ coincidences, integral gamma counting and Liquid Scintillation Counting using the triple to double coincidence ratio and the CIEMAT/NIST methods. Given the short half-life of the radionuclide assayed, a direct comparison between results from both laboratories was excluded and a comparison of experimental efficiencies of similar NaI detectors was used instead. - Highlights: ► We standardized the positron emitter Ga-68 in a bilateral cooperation. ► We used several techniques, as coincidence, integral gamma and liquid scintillation. ► An efficiency comparison replaced a direct comparison of reference materials.

  17. Quality management program according to the ISO 9001: 2000 for the high density research reactor fuel development project (CADRIP)

    International Nuclear Information System (INIS)

    Mazzini, M.; Mamberto, L.; Piazza, A.F.

    2002-01-01

    The Quality is recognized at world level as the most effective and competitive strategy for the economic survival and the prosperity of organizations. In such a sense it is used to speak of the quality globalization. To be able to be competitive and to satisfy the more and more demanding expectations of the customers, the organization should use systems every time more effective and efficient. Such systems should lead to a continuous improvement of the quality and a highest satisfaction of the customers and of all the involved sectors (personnel, collaborators, stakeholders, suppliers, society). To these effects the National Commission of Atomic Energy of the Argentine Republic (CNEA) there is elaborated, ace necessary methodological instrument to guide and assessment t the process of continuous improvement of all the activities of the organization, to Quality Management Program (PGC) from which the Quality Systems of the facilities, laboratories and projects depends. The Quality System of the Development of Nuclear Fuels of High Density Project (CADRIP) was develop in accordance of the requirements of the PGC and the ISO 9001:2000, IAEA 50-C/SG-Q and AR 3.6.1. of the Nuclear Regulatory Body standards. The work describes this quality system, the systematic identification and administration of the processes used for the organization and the interaction among them. (author)

  18. The production of Co-60 sealed sources at the National Atomic Energy Commission

    International Nuclear Information System (INIS)

    Freijo, Jose L.

    2002-01-01

    The production and sale of Cobalt 60 by CNEA is in a key momentum for its consolidation, after passing through situations dose to un viability. The sealed sources demand is assured for the next six years and strongly concentrated in the exportation, mainly to the United States and Europe. The project is economically viable even keeping in mind the necessary investments to assure the growing and sustentability of the business. Therefore, it is possible to have realistic and optimists expectation of growing in the medium and long term. To this respect it results fundamental to confront these activities with a medium and long term vision in order to avoid future uncertainties in the project and, at the same time, to guide and motivate the personnel involved in the efforts that necessarily must be performed to achieve the proposed target. The fundamental steps to be concreted are the construction of new production cells and the transformation of the activities into a private development frame through the creation of a commercial society. (author)

  19. Design of fuel element for RA10

    International Nuclear Information System (INIS)

    Estevez, Esteban A.; Markiewicz, Mario; Gerding, Roberto

    2012-01-01

    The RA-10 reactor is an open pool multipurpose reactor. It is intended for radioisotopes production, fuel irradiation and use of neutron beam experiments. The nominal configuration core consists of 19 fuel elements (FE) and 6 in-core irradiation positions. With regard to the FE, although both conceptual design and manufacturing technology are similar to the already developed and qualified by CNEA (MTR fuel flat plate), the conditions imposed by the new reactor on FE's are more demanding that previous supplies. Here it should be mentioned the magnitude of the hydrodynamic forces acting on the FE caused by coolant flow through the core (upward) and mainly by the high coolant velocity between fuel plates (greater than 5 times than those currently in operation). Moreover, the high power density results in higher heat flux in fuel plates and greater temperature gradient. As a result of these increased demands present during irradiation, and in order to maintain a high level of reliability, it is necessary carry out some modifications in the mechanical design of the FE (with respect to the so-called ECBE design or s tandard ) . Design verification is performed through analytical and code calculations, and hydrodynamic tests on a full-scale prototype. This article describes the design of the FE for RA 10 reactor, with special emphasis on those aspects that represent innovations in the traditional design (ECBE). It also presents the functional requirements, design criteria and design limits established according to the reactor operational states (author)

  20. Integrated management for aging of Atucha Nuclear Power Plant

    International Nuclear Information System (INIS)

    Ranalli, J.M.; Marchena, M.H.; Sabransky, M.; Fonseca, M.; Santich, J.; Pedernera, P.

    2012-01-01

    Atucha NPP is a two PHWR unit site located in Lima, Province of Buenos Aires, 120 km north of Buenos Aires, Argentina.. With the start-up of Atucha II and aiming to integrate the Ageing Management of the plants, the Utility (Nucleolectrica Argentina Sociedad Anonima - NASA) created an Ageing Management Department to cope with all ageing issues of both Atucha I and II. In this project both organization has formed a joint working group. The role of CNEA is providing technical support to the plant in the development of procedures a methodological framework for the Ageing Management Program of Atucha NPP. The main documents that have being issued so far are: . An Ageing Management Manual, including standard definition of Materials, Ageing Related Degradation Mechanisms, Operation Environments customized for Atucha NPP. . Walk down procedures and checklists aimed to systematize data collection during outages. . Procedures for performing Ageing Management Reviews and Maintenance Reviews for passive and active components. . Condition Assessments of several safety related systems. . Condition assessment of electrical components. In the present work a summary of the activities, documental structure and first outputs of the Integrated Ageing Management Program of Atucha NPP is presented (author)

  1. Leaves of knowledge, a collectable publication for dissemination of scientific and technological topics

    International Nuclear Information System (INIS)

    Spurio, S. M.

    2013-01-01

    The Institute of Energy and Sustainable Development (IEDS) of the National Atomic Energy Commission of Argentina performs an active task of popularization of nuclear science and technology applications and its spin-off activities. The IEDS, based on this goal and the known expression of Descartes 'Science branches intertwine in the Tree of Knowledge' has been making the annual task of inviting authors, editing, publishing and often, printing the publication Leaves of Knowledge, since 2008 and without interruption. The presentation format consists in a holder folder containing collectibles sheets. Each sheet represents a leaf on the Tree Science Knowledge. The publication encourages the participation of renowned professionals invited from CNEA and other Institutions who are committing to writing just two pages of their topic specialty. As to the fifth edition currently being edited, 56 items have already been published on the following seven general topics: ENVIRONMENT - APPLICATIONS - SCIENCE - ENERGY - MATERIALS - HEALTH - SAFETY. Although it was originally aimed to the general public, now it has evolved into three distinct approaches also covering universitary and professional level. Its PDF version is available to the public through the IEDS website and it was registered under its corresponding ISBN. (author)

  2. Nuclear fuel cycle head-end enriched uranium purification and conversion into metal

    International Nuclear Information System (INIS)

    Bonini, A.; Cabrejas, J.; Lio, L. de; Dell'Occhio, L.; Devida, C.; Dupetit, G.; Falcon, M.; Gauna, A.; Gil, D.; Guzman, G.; Neuringer, P.; Pascale, A.; Stankevicius, A.

    1998-01-01

    The CNEA (Comision Nacional de Energia Atomica - Argentina) operated two facilities at the Ezeiza Atomic Center which supply purified enriched uranium employed in the production of nuclear fuels. At one of those facilities, the Triple Height Laboratory scraps from the production of MTR type fuel elements (mainly out of specification U 3 O 8 plates or powder) are purified to nuclear grade. The purification is accomplished by a solvent extraction process. The other facility, the Enriched Uranium Laboratory produces 90% enriched uranium metal to be used in Mo 99 production (originally the uranium was used for the manufacture of MTR fuel elements made of aluminium-uranium alloy). This laboratory also provided metallic uranium with a lower enrichment (20%) for a first uranium-silicon testing fuel element, and in the near future it is going to recommence 20% enriched uranium related activities in order to provide the metal for the silicon-based fuel elements production (according to the policy of enrichment reduction for MTR reactors). (author)

  3. Reaction layer between U-7WT%Mo and Al alloys in chemical diffusion couples

    International Nuclear Information System (INIS)

    Mirandou, M.; Granovsky, M.; Ortiz, M.; Balart, S.; Arico, S.; Gribaudo, L.

    2005-01-01

    Several failures in U-Mo dispersion fuel plates like pillowing and large porosities have been reported during irradiation experiments. These failures have been assigned to the formation of a large (U-Mo)/Al interaction product under high operating conditions. The modification of the matrix by alloying Al to change the interaction layer and improve its irradiation behavior, has been proposed. This paper reports diffusion experiments performed between U-7wt%Mo and various Al alloys containing Mg and / or Si. By the use of Optical Microscopy, SEM and X-Ray diffraction, it was found that with a concentration of 5.2wt% or 7.1 wt%Si the interaction layer is constituted mainly by (U,Mo)(Si,Al) 3 and no (U,Mo)Al 4 is detected. As part of the studies of properties of the U-Mo alloys the time for isothermal transformation start at different temperatures of the γ phase is being evaluated for the present U-7wt%Mo alloy. These results are used to plan the future diffusion program that will include diffusion under irradiation at CNEA RA3 reactor. (author)

  4. Development of dispersion U(Mo)/Al–Si miniplates fabricated at 500 °C with Al 6061 as cladding

    Energy Technology Data Exchange (ETDEWEB)

    Mirandou, M.I., E-mail: mirandou@cnea.gov.ar [Gerencia Materiales-GAEN-CNEA, Avda. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires (Argentina); Aricó, S.F. [Gerencia Materiales-GAEN-CNEA, Avda. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires (Argentina); Instituto Sabato UNSAM-CNEA, Avda. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires (Argentina); Balart, S.N. [Gerencia Materiales-GAEN-CNEA, Avda. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires (Argentina); Fabro, J.O. [Departamento ECRI, Gerencia de Ciclo del Combustible Nuclear, CNEA, Avda. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires (Argentina)

    2015-02-15

    In the frame of U(Mo) dispersion fuel elements qualification, Si additions to Al matrix arose as a promising solution to the unacceptable failures found when pure Al is used. Analysis of as-fabricated fuel plates made with Al–Si matrices demonstrated that good irradiation behavior is correlated with the formation during fabrication of a Si-containing interaction layer around the U(Mo) particles. Thus, the analysis of the influence of fabrication parameters becomes important. Studies on Al–Si dispersion miniplates fabricated in CNEA, Argentina, have been initiated to determine how to obtain the better interaction layer characteristics with the lesser modifications to the fabrication process and the smaller amount of Si in the matrix. In this work results for miniplates made of atomized U–7 wt%Mo particles dispersed in Al–2 wt%Si and Al–4 wt%Si matrices, obtained by mixing pure Al and Si powders, and Al 6061 as cladding are presented. Interaction layer grown during fabrication process (500 °C) consists of Si-containing phases being U(Al, Si){sub 3} its principal component. Its uniformity is not satisfactory due to the formation of an oxide layer.

  5. Nuclear power generation and global heating

    International Nuclear Information System (INIS)

    Taboada, Horacio

    1999-01-01

    The Professionals Association and Nuclear Activity of National Atomic Energy Commission (CNEA) are following with great interest the worldwide discussions on global heating and the role that nuclear power is going to play. The Association has an active presence, as part of the WONUC (recognized by the United Nations as a Non-Governmental Organization) in the COP4, which was held in Buenos Aires in November 1998. The environmental problems are closely related to human development, the way of power production, the techniques for industrial production and exploitation fields. CO 2 is the most important gas with hothouse effects, responsible of progressive climatic changes, as floods, desertification, increase of average global temperature, thermal expansion in seas and even polar casks melting and ice falls. The consequences that global heating will have on the life and economy of human society cannot be sufficiently emphasized, great economical impact, destruction of ecosystems, loss of great coast areas and complete disappearance of islands owing to water level rise. The increase of power retained in the atmosphere generates more violent hurricanes and storms. In this work, the topics presented in the former AATN Meeting is analyzed in detail and different technological options and perspectives to mitigate CO 2 emission, as well as economical-financial aspects, are explored. (author)

  6. Progress on LEU very high density fuel and target development in Argentina

    International Nuclear Information System (INIS)

    Balart, S.; Cabot, P.; Calzetta, O.; Duran, A.; Garces, J.; Hermida, J.D.; Manzini, A.; Pasqualini, E.; Taboada, H.

    2006-01-01

    Since last RRFM meeting, CNEA has continued on new LEU fuel and target development activities. Main goals are the plan to convert our RA-6 reactor from HEU to a new LEU core, to get a comprehensive understanding of U-Mo/Al compounds phase formation in dispersed and monolithic fuels, to develop possible solutions to VHD dispersed and monolithic fuels technical problems, to optimize techniques to recover U from silicide scrap samples as cold test for radiowaste separation for final conditioning of silicide spent fuels. and to improve the diffusion of LEU target and radiochemical technology for radioisotope production. Future plans include: - Completion of the RA-6 reactor conversion to LEU; - Improvement on fuel development and production facilities to implement new technologies, including NDT techniques to assess bonding quality; - Irradiation of miniplates and full scale fuel assembly at RA-3 and plans to perform irradiation on higher power and temperature regime reactors; - Optimization of LEU target and radiochemical techniques for radioisotope production. (author)

  7. RERTR progress in Mo-99 production from LEU

    Energy Technology Data Exchange (ETDEWEB)

    Vandegrift, G.F.; Conner, C.; Aase, S.; Bakel, A.; Bowers, D.; Freiberg, E.; Gelis, A.; Quigley, K.J.; Snelgrove, J.L. [Argonne National Laboratory 9700 S. Cass Avenue, Argonne, IL (United States)

    2002-07-01

    The ANL RERTR program is performing R and D supporting conversion of {sup 99}Mo production from HEU to LEU targets. Irradiation and processing of LEU targets were demonstrated at the Argentine Ezeiza Atomic Center. Target irradiation and disassembly were flawless, but the processing is not fully developed. In addition to preparing for, assisting in, and analyzing results of the demonstration, we performed other R and D related to LEU conversion: (1) designing a prototype production dissolver for digesting irradiated LEU foils in alkaline solutions and developing means to simplify digestion, (2) modifying ion-exchange columns used in the CNEA recovery and purification of {sup 99}Mo to deal with the lower volumes generated from LEU-foil digestion, (3) measuring the performance of new inorganic sorbents that outperform alumina for recovering Mo(VI) from nitric acid solutions containing high concentrations of uranium nitrate, and (4) developing means to facilitate the concentration and calcination of waste nitric-acid/LEU-nitrate solutions from {sup 99} Mo production. (author)

  8. Environmental radiological protection of Bariloche Atomic Center; Proteccion radiologica ambiental del Centro Atomico Bariloche

    Energy Technology Data Exchange (ETDEWEB)

    Andres, Pablo A.; Levanon, Izhar S., E-mail: andresp@cab.cnea.gov.ar, E-mail: levanon@cab.cnca.gov.ar [Comision Nacional de Energia Atomica (CNEA), San Carlos de Bariloche (Argentina). Centro Atomico Bariloche. Division Proteccion Radiologica

    2013-07-01

    This plan of monitoring radiological environmental routine fits on environmental policy of CNEA, satisfying national and international recommendations for licensed facilities. Sampling matrices are related to direct routes of exposure: air and water (river, lake, sediments, drinking water). Soil samples are also analyzed for having integrated matrices. They are considered as minimum three points of measurement: a white point (water or winds up), a point of maximum (water or winds down) and a point corresponding to the location of the individual representative or a point of public interest. Measurements in air estimate KERMA rate with thermoluminescent dosimeters, bi-monthly, and concentrations of particulate material and aerosols. For water samples (monthly), soil and sediments (quarterly), radionuclides that have download limits are analyzed, according to its importance in the dosages produced in the representative individual. In these cases artificial radionuclides using gamma spectrometry, beta total and Sr-90 by radiochemical techniques if the value of total screening (1 Bq/L) is exceeded. Foods are not included because no possible matrices were detected, either by their distance. by located not predominant wind direction. They are however still looking for milk producers that fulfills the minimum requirements.The data collected are compared with environmental baselines to set trends that might point to future significant changes in the environment during the life of the facilities. So far it was not observed significant differences with respect to baseline values.

  9. Implementation of a quality assurance system for the design and manufacturing of fuel assembly MTR-plate type

    International Nuclear Information System (INIS)

    Koll, J.H.

    1987-01-01

    Since more than 30 years ago, fuel assemblies (FA) of the MTR-Plate type, for research reactors, have been developed and produced using well known technologies, with different methods for the design, manufacturing, quality control and subsequent verification of FA behaviour, as well as of the design data. The FA and its reliability has been improved through the recycling of the obtained information. No nuclear accidents or major incidents have taken place that can be blamed to FA due to design, manufacturing or its use. Since the 70's, the use of Quality Assurance methodology has been increased, especially for Nuclear Power Plants, in order to ensure safety for these reactors. The use of QA for reactors for research, testing or other uses, has also been steadily increased, not only due to safety reasons, but also because of its convenience for a good operation, being presently a common requirement of the operator of the installation. Herewith is described the way the QA system that has been developed for the design, manufacturing, quality control and supply of MTR-plate type FA, at the Development Section of the Argentine Atomic Energy Commission (CNEA). (Author)

  10. Environmental radiological protection of Bariloche Atomic Center

    International Nuclear Information System (INIS)

    Andres, Pablo A.; Levanon, Izhar S.

    2013-01-01

    This plan of monitoring radiological environmental routine fits on environmental policy of CNEA, satisfying national and international recommendations for licensed facilities. Sampling matrices are related to direct routes of exposure: air and water (river, lake, sediments, drinking water). Soil samples are also analyzed for having integrated matrices. They are considered as minimum three points of measurement: a white point (water or winds up), a point of maximum (water or winds down) and a point corresponding to the location of the individual representative or a point of public interest. Measurements in air estimate KERMA rate with thermoluminescent dosimeters, bi-monthly, and concentrations of particulate material and aerosols. For water samples (monthly), soil and sediments (quarterly), radionuclides that have download limits are analyzed, according to its importance in the dosages produced in the representative individual. In these cases artificial radionuclides using gamma spectrometry, beta total and Sr-90 by radiochemical techniques if the value of total screening (1 Bq/L) is exceeded. Foods are not included because no possible matrices were detected, either by their distance. by located not predominant wind direction. They are however still looking for milk producers that fulfills the minimum requirements.The data collected are compared with environmental baselines to set trends that might point to future significant changes in the environment during the life of the facilities. So far it was not observed significant differences with respect to baseline values

  11. Characterization of internal surface finishing of tubes for CAREM 25 fuel rods

    International Nuclear Information System (INIS)

    Loureiro, N.V; Juarez, G; Bianchi, D; Flores, A; Vizcaino, P

    2012-01-01

    One of the factors that ensure the good behavior of the fuel claddings of the nuclear power reactors is the internal surface quality. In the present work has been carried out a study of the internal surface of the tube after a cold rolling process developed in the Departamento de Tecnologia de Aleaciones de Circonio and applied by FAE-SA and PPFAE-CNEA in each rolling stage to obtain the fuel claddings for the reactor CAREM 25. The inner surface has been observed by scanning electron microscopy, SEM, being the objective of this study to verify not only the good internal surface but also infer about how starting from tubes of different initial diameter reduction the quality of the final product will be affected. The manufacturing process of the tubes for this new fuel went through modifications during the development, adding intermediate chemical pickling stages in order to improve the internal surface quality of the final product. From determinations made with ultrasound, the defects charts obtained made it possible to compare the observed signals more relevant and the micrographs in these areas in order to characterize possible defects (author)

  12. Effect of an Excess of Chromium and Hydriding on Zircaloy-4

    International Nuclear Information System (INIS)

    Soldati, A.; Ghilarducci, A. A; Corso, H.L.; Peretti, H.A.; Bolcich, J.C

    2003-01-01

    Results of mechanical properties and microstructure morphologies of zircaloy-4 are presented.They were obtained in several laboratory made samples of chemical composition modified with respect to the ASTM B 350 by the addition of alloying elements as well as hydrides.This work is focused mainly on the effect of 900 ppm of additional Cr in excess as compared with the standard composition alloy and with two other laboratory alloys studied before, containing 250 ppm of Ni in excess and 1000 ppm of Fe in excess, respectively.The study is carried out by means of tensile tests at room temperature and at 240C, hardness tests, SEM observations and EDS microanalysis.The neutron irradiation was carried out at Bariloche in the RA6-CNEA reactor.The results indicate that precipitates concentrate along grain boundaries in all cases, and that for higher contents of alloying elements corresponds a higher quantity of precipitates and smaller grain sizes.Except for the hydrided sample, the fracture is ductile with cavities nucleated at precipitates

  13. Evaluation of determinative methods for sodium impurities

    International Nuclear Information System (INIS)

    Molinari, Marcelo; Guido, Osvaldo; Botbol, Jose; Ares, Osvaldo

    1988-01-01

    Sodium, universally accepted as heat transfer fluid in fast breeder reactors, requires a special technology for every operation involved in any applicable methodology, due to its well known chemical reactivity. The purpose of this work is: a) to study the sources and effects of chemical species which, as traces, accompany sodium used in the nuclear field; b) to classify, taking into account, the present requirements and resources of the National Atomic Energy Commission (CNEA), the procedures found in the literature for determination of the most important impurities which exist in experimental liquid sodium systems and c) to describe the principles of the methods and to evaluate them in order to make a selection. It was concluded the convenience to develop, as a first stage, laboratory procedures to determine carbon, oxygen, hydrogen and non-volatile impurities, which besides serving present needs, will be referential for direct methods with undeferred response. The latter are needed in liquid sodium experimental loops and require, primarily, more complex and extended development. Additionally, a description is made of experimental work performed up-to-now in this laboratory, consisting of a transfer device for sodium sampling and a sodium distillation device, adapted from a previous design, with associated vacuum and inert gas systems. It is intended as a separative technique for indirect determination of oxygen and non-volatile impurities. (Author) [es

  14. Studies concerning the degradation of concrete vaults for intermediate-level radioactive waste disposal

    International Nuclear Information System (INIS)

    Duffo, Gustavo S.; Arva, Esteban A; Giordano, Celia M.; Lafont, Claudio J.

    2007-01-01

    The National Atomic Energy Commission (CNEA) is the responsible for developing a management nuclear waste disposal programme. This programme contemplates the design and construction of a facility for the final disposal of intermediate-level radioactive wastes. The proposed model is the near-surface monolithic repository similar to those in operation in El Cabril, Spain. The design of this type of repository is based on the use of multiple, independent and redundant barriers. Since the vault and cover are major components of the engineered barriers, the durability of this concrete structures is an important aspect for the facilities integrity. This work presents a laboratory and field investigation performed for the last 6 years on reinforced concrete specimens, in order to predict the service life of the intermediate level radioactive waste disposal vaults from data obtained from electrochemical techniques. On the other hand, the development of sensors that allow on-line measurements of rebar corrosion potential and corrosion current density; incoming oxygen flow that reaches the metal surface; concrete electrical resistivity and chloride concentration is shown. Those sensors, properly embedded in a new full scale vault (nowadays in construction), will allow the monitoring of the corrosion process of the steel rebars embedded in the structure. All the information obtained from the sensors will be used for the final design of the container in order to achieve a service life more or equal than the foreseen durability for this type of facilities. (author) [es

  15. Food irradiation 2009

    International Nuclear Information System (INIS)

    Narvaiz, Patricia

    2009-01-01

    Food irradiation principles; its main applications, advantages and limitations; wholesomeness, present activities at Ezeiza Atomic Centre; research coordinated by the International Atomic Energy Agency; capacity building; and some aspects on national and international regulations, standards and commercialization are briefly described. At present 56 countries authorize the consumption of varied irradiated foods; trade is performed in 32 countries, with about 200 irradiation facilities. Argentina pioneered nuclear energy knowledge and applications in Latin America, food irradiation included. A steady growth of food industrial volumes treated in two gamma facilities can be observed. Food industry and producers show interest towards new facilities construction. However, a 15 years standstill in incorporating new approvals in the Argentine Alimentary Code, in spite of consecutive request performed either by CNEA or some food industries restricts, a wider industrial implementation, which constitute a drawback to future regional commercialization in areas such as MERCOSUR, where Brazil since 2000 freely authorize food irradiation. Besides, important chances in international trade with developed countries will be missed, like the high fresh fruits and vegetables requirements United States has in counter-season, leading to convenient sale prices. The Argentine food irradiation facilities have been designed and built in the country. Argentina produces Cobalt-60. These capacities, unusual in the world and particularly in Latin America, should be protected and enhanced. Being the irradiation facilities scarce and concentrated nearby Buenos Aires city, the possibilities of commercial application and even research and development are strongly limited for most of the country regions. (author) [es

  16. Observations in the Sequence of UMo Monolithic Miniplates Preparation

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, Marisol; Gonzalez, Alfredo; Taboada, Horacio [Gerencia Ciclo del Combustible Nuclear, CAC, Comision Nacional de Energia Atomica, Av. Gral. Paz 1499, B1650KNA (Argentina)

    2011-07-01

    According with the works that the National Atomic Energy Commission of Argentina (CNEA) has being deploying in the frame of the reactor core conversion from HEU to LEU fuel, specially working with UMo monolithic core with Zyrcalloy based cladding concept, we put in sequence and give explanation to the observations recorded during our fabrication development tests. To that aim we performed several tests with different parameters conditions and we list all the observations and the possible causes of presence of undesirable phases, shapes or errors appeared during the fabrication tests of those miniplates. The binding techniques of materials employed in our fabrication include the process in solid state without fusion, but that requires pressure or temperature. The principal method employed in this work is a union process of continues rolling at temperature which is called co-rolling in order to produce a union of the surfaces in touch where it can be observed a new structure, and dog bone presence depending on the fabrication conditions. (author)

  17. Radiation hardening at 77 K in Zn and Cu single crystals at low doses

    International Nuclear Information System (INIS)

    Gonzalez, H.C.; Bisogni, E.A.

    1980-01-01

    There is controversy about radiation hardening phenomenon and its additivity with other hardening mechanisms. The purpose of this work is to contribute to the understanding of this subject, through measurements made in Zn and Cu single crystals. Post-irradiation measurements of yield stress of Zn, made on different single crystals, show a direct proportionality to the 0.5 power of the dose. It is determined that for a dose greater than 3.7 x 10 16 neutrons cm -2 s -1 there is always cleavage. The maximum critical resolved shear stress measured is about 8.82 MPa. In order to study additivity it is necessary to lower experimental errors. A micro tensile machine is designed to operate in the CNEA facility RA1 in a bath of liquid N 2 . Experimental measurements of yield stress with dose are carried out in-situ on the same single crystals. Experimental results on Cu and Zn show that radiation induced yield stress increases with a 0.5 power law. It must be taken into account that the definition of radiation induced yield stress stands for radiation created obstacles operating alone. The radiation induced yield stress adds algebraically to the athermal component of the initial yield stress but is not exactly additive to the other thermally activated mechanisms. A gradual transition from one to the other type of obstacles is observed. (author)

  18. Post-irradiation examination of U3SIX-AL fuel element manufactured and irradiated in Argentina

    International Nuclear Information System (INIS)

    Ruggirello, Gabriel; Calabroni, Hector; Sanchez, Miguel; Hofman, Gerard

    2002-01-01

    As a part of CNEA's qualification program as a supplier of low enriched Al-U 3 Si 2 dispersion fuel elements for research reactors, a post irradiation examination (PIE) of the first prototype of this kind, called P-04, manufactured and irradiated in Argentina, was carried out. The main purpose of this work was to set up various standard PIE techniques in the hot cell, looking forward to the next steps of the qualification program, as well as to acquire experience on the behaviour of this nuclear material and on the control of the manufacturing process. After an appropriate cooling period, on May 2000 the P-04 was transported to the hot cell in Ezeiza Atomic Centre. Non destructive and destructive tests were performed following the PIE procedures developed in Argonne National Laboratory (ANL), this mainly included dimensional measurement, microstructural observations and chemical burn-up analyses. The methodology and results of which are outlined in this report. The results obtained show a behaviour consistent with that of other fuel elements of the same kind, tested previously. On the other hand the results of this PIE, specially those concerning burn-up analysis and stability and corrosion behaviour of the fuel plates, will be of use for the IAEA Regional Program on the characterization of MTR spent fuel. (author)

  19. Irradiation of Argentine MOX fuels: Post-irradiation results and analysis

    International Nuclear Information System (INIS)

    Marino, A.C.; Perez, E.; Adelfang, P.

    1997-01-01

    The irradiation of the first Argentine prototypes of PHWR MOX fuels began in 1986. These experiments were made in the HFR-Petten reactor, Holland. The rods were prepared and controlled in the CNEA's facility. The postirradiation examinations were performed in the Kernforschungszentrum, Karlsruhe, Germany and in the JRC, Petten. The first rod has been used for destructive pre-irradiation analysis. The second one as a pathfinder to adjust systems in the HFR. Two additional rods including iodine doped pellets were intended to simulate 15000 MWd/T(M) burnup. The remaining two rods were irradiated until 15000 MWd/T(M) (BU15 experiment). One of them underwent a final ramp with the aim of verifying fabrication processes and studying the behaviour under power transients. BACO code was used to define the power histories and to analyze the experiments. This paper presents the postirradiation examinations for the BU15 experiments and a comparison with the BACO outputs for the rod that presented a failure during the ramp test of the BU15 experiment. (author). 17 refs, 30 figs, 5 tabs

  20. Evaluation of the Cerro Solo nuclear ore, province of Chubut. The Cerro Solo project within the frame of uranium exploration in Argentina. Pt. 1

    International Nuclear Information System (INIS)

    Solis, R.J.; Navarra, P.R.; Benitez, A.F.; Gallucci, A.R.

    1993-01-01

    The Cerro Solo ore deposit was selected by the CNEA to invest in an assessment project because of their promising grade and amount of known and potential resources, significant to Argentina's uranium requirements. The deposit, which is located in the central region of the Chubut Province, belongs to the sandstone type and is hosted by the cretaceous Chubut Group. Technical studies carried out forecast an important growth of nuclear capacity to meet Argentina's energy requirements in the first two decades of of the the next century. To be in position to confront the challenge presented by increasing uranium resources to fuel the nuclear powers plants it is very important, as a first step, to improve the geological knowledge of uranium favorability in the country. The preliminary results of the Cerro Solo project indicate that the eastern slope of the Pichinan hills is a promising area for development of uranium resources, increasing the favorability of the San Jorge Basin in order to allow contributing to meet future uranium requirements. The Cerro Solo Project was planned in a sequential manner, as a multidisciplinary effort which includes studies on: geologic setting of mineralization, resource estimates, costs of mining and milling methods, economic analysis and environmental impact research. Among the mining methods, studies include the alternative of the in-situ leaching technology, which is becoming a low producing cost interesting possibility. (Author)

  1. Education in physics of radiotherapy

    International Nuclear Information System (INIS)

    Kessler, Judith; Feld, Diana B.; Portillo, Perla A.; Casal, Mariana R.; Menendez, Pablo R.

    2008-01-01

    Radiotherapy is the clinical application which requires the highest precision in dose delivery because of the very high doses administrated to patients, taking into account that new diagnostic methods and new modalities and treatment machines give greater possibilities of dose escalation. These higher doses may also produce serious side effects if not accurately administered. High qualified personnel is therefore needed for dealing with these new complex modalities, assuring that dose prescribed is correctly administered and providing adequate radiation protection to patients, public and staff. Education in Physics of Radiotherapy aims to provide students with solid theoretical and practical basis in order to be able to work with great responsibility and understanding in a Radiotherapy Department and assure that appropriate radiation protection to patients, public and staff. Since 1964 the National Atomic Energy Commission (CNEA) gives course related to Radiotherapy and since 2002, due to a collaborative project, these courses are given at the Oncology Institute 'Angel H. Roffo' (IOAR) which belongs to the University of Buenos Aires (UBA). The IOAR is well equipped in Radiotherapy and new techniques are continuously introduced. That is why, being a University Institution and having highly specialized staff, it is the ideal hospital for teaching Radiotherapy in Buenos Aires, not only for regular courses but also for implementing workshops, seminars and updating courses as well. Continuous education helps to create and increase awareness of the importance of radiation protection in patients as well as in public and staff. (author)

  2. Analysis of a provider of proficiency testing by interlaboratory comparisons for dosimetry in function of guides ISO/IEC 43 and ILAC G13

    International Nuclear Information System (INIS)

    Lohr, J.; Zaretzky, Alba; Stefanic, Amalia M.; Saravi, M.

    2009-01-01

    The Ionising Radiation Dosimetry Group (CNEA) has participated of the last intercomparison scheme organized by EUROMET. This intercomparison was held starting 2005 until 2008.The objective of this paper is to analyze this Association as a proficiency test provider according to the ISO/IEC Guide 43 (1997) 'Proficiency testing by interlaboratory comparisons' and ILAC G13 Guide (2007) 'Guidelines for the Requirements for the Competence of Providers of Proficiency Testing Schemes'. The analysis of EURAMET (so called since 2007) as the provider of this dosimetric comparison was made taking into account the following sections of the ILAC G13 Guide: Conduct of proficiency testing schemes; Statistical design, Communication with participants and Reports, taking them as essential parameters of the compliance of a proficiency test provider with the general requirements set by the Guides. This intercomparison had special characteristics coming from the participants and the primary objective of the scheme. It is remarkable the important degree of agreement of the organization with Guides ISO/IEC 43 and ILAC G13. (author)

  3. Transformation temperatures γU → δUZr2 Y γU →αU in U-Zr-Nb alloys

    International Nuclear Information System (INIS)

    Komar Varela, Carolina L.; Arico, Sergio F.; Gribaudo, Luis M.; Comision Nacional de Energia Atomica, General San Martin

    2009-01-01

    The international RERTR program has as primary objective the development of new fuels for research and test reactors to satisfy the requirement of low enrichment in 235 U (lower than 20 %). It is known that the cubic-phase (γU) has an excellent behaviour under irradiation. In this context, in the Materials Department (GIDAT-GAEN-CNEA) U-Zr-Nb alloys are considered candidates for the development of a high-density monolithic-type nuclear fuel. It is necessary to evaluate the thermodynamic parameters that allow to obtain a range of concentrations of the U-Zr-Nb system in which this phase can be retained in the metastable condition with the required 235 U density. In this work, eight U alloys with concentrations ranging from 13.9 to 43.7 wt.% Zr and from 0 to 6.4 wt.% Nb, were fabricated. Dynamical measurements of electrical resistivity, with a cooling rate of 4 o C/min, were performed and the results were analyzed. Considering this cooling rate, a Nb concentration of at least 17.8 wt. % would inhibit the transformation γU→ δUZr 2 and a concentration of al least 23.3 wt % would inhibit the γU → αU transformation. (author)

  4. Starting Point, Keys and Milestones of a Computer Code for the Simulation of the Behaviour of a Nuclear Fuel Rod

    Directory of Open Access Journals (Sweden)

    Armando C. Marino

    2011-01-01

    Full Text Available The BaCo code (“Barra Combustible” was developed at the Atomic Energy National Commission of Argentina (CNEA for the simulation of nuclear fuel rod behaviour under irradiation conditions. We present in this paper a brief description of the code and the strategy used for the development, improvement, enhancement, and validation of a BaCo during the last 30 years. “Extreme case analysis”, parametric (or sensitivity, probabilistic (or statistic analysis plus the analysis of the fuel performance (full core analysis are the tools developed in the structure of BaCo in order to improve the understanding of the burnup extension in the Atucha I NPP, and the design of advanced fuel elements as CARA and CAREM. The 3D additional tools of BaCo can enhance the understanding of the fuel rod behaviour, the fuel design, and the safety margins. The modular structure of the BaCo code and its detailed coupling of thermo-mechanical and irradiation-induced phenomena make it a powerful tool for the prediction of the influence of material properties on the fuel rod performance and integrity.

  5. Friction stir welding (FSW) of AA 6061 T6

    International Nuclear Information System (INIS)

    Cabot, Pedro; Monglioni, Alberto; Carella, Eduardo

    2002-01-01

    The friction-stir process (FSW) developed by England's TWI in the last decade is a new concept in solid phase friction welding that is particularly appropriate for soldering aluminum and its alloys. It offers interesting aspects and can advantageously replace the usual arch processes. It is an automatic process that solders together long pieces by butt or lap welding and, therefore, overcomes the greater limitation of the conventional friction process that can be applied only to pieces with revolution symmetry. FSW is based essentially on the use of a cylindrical tool with a special profile, which is inserted between the surfaces where the materials meet to join them together at a certain rotation speed and under a specific force. The pieces must be rigidly butt bonded or overlapped to prevent movement when the tool moves forward along the joint producing the dispersion of oxides, local plastisizing of the material and the weld. Since its creation FSW has been the subject of many international publications, but until the present work there was no technologically relevant data about tools and procedures. For this reason, when its promising and novel nature was noticed, the CNEA began its own development project in 1997. The main characteristics of the tool are reviewed here and the results of tests carried out to evaluate the influence of the feed velocity on the mechanical properties of the butt joining of a 6.25 mm thick AA6061 T6 plate. Different accumulated aspects of the experience are discussed as well (cw)

  6. Irradiation of Argentine (U,Pu)O 2 MOX fuels. Post-irradiation results and experimental analysis with the BACO code

    Science.gov (United States)

    Marino, Armando Carlos; Pérez, Edmundo; Adelfang, Pablo

    1996-04-01

    The irradiation of the first Argentine prototypes of pressurized heavy water reactor (PHWR) (U,Pu)O 2 MOX fuels began in 1986. These experiments were carried out in the High Flux Reactor (HFR)-Petten, Holland. The rods were prepared and controlled in the CNEA's α Facility. The postirradiation examinations were performed in the Kernforschungszentrum, Karlsruhe, Germany and in the Joint Research Center (JRC), Petten. The first rod has been used for destructive pre-irradiation analysis. The second one as a pathfinder to adjust systems in the HFR. Two additional rods including iodine doped pellets were intended to simulate 15 000 MWd/T(M) burnup. The remaining two rods were irradiated until 15 000 MWd/T(M). One of them underwent a final ramp with the aim of verifying fabrication processes and studying the behaviour under power transients. BACO (BArra COmbustible) code was used to define the power histories and to analyse the experiments. This paper presents a description of the different experiments and a comparison between the results of the postirradiation examinations and the BACO outputs.

  7. The CAREM project: Present status and development activities

    International Nuclear Information System (INIS)

    Boado Magan, H.J.; Ordonez, J.P.; Hey, A.

    1997-01-01

    The CAREM Project is a low power NPP of 25 Mwe, with an integrated self pressurized primary system. The cooling of the primary system is of the natural circulation type and several passive safety systems are included. The owner of the Project is Argentina's CNEA (Comision Nacional de Energia Atomica) and its associated company, INVAP, is the main contractor. The present status of the CAREM Project is presented. The possible evolution of the CAREM project is mentioned in relation with a new containment design. A short description of the Experimental Facilities, listed below, already in operation and under construction are also included: CAPCN High Pressure Loop. Natural convection loop to verify dynamic response and critical heat flux; RA-8. Critical Facility, designed and constructed for the CAREM Project (that may be used as a general uses facility); RPV lnternals. The whole assembly of absorbent rods, connecting rods and the rode guides are being constructed in a 1:1 scale. The aims of this experimental facility are vibration analysis and manufacturing parameters definitions. Control Drive Mechanisms. A series of verification and tests are being carried out on these within RPV Hydraulically driven mechanisms. Other development activities are mentioned in relation with the thermalhydraulics, Steam Generators and Control. (author)

  8. Steel corrosion in radioactive waste storage tanks

    International Nuclear Information System (INIS)

    Carranza, Ricardo M.; Giordano, Celia M.; Saenz, E.; Weier, Dennis R.

    2004-01-01

    A collaborative study is being conducted by CNEA and USDOE (Department of Energy of the United States of America) to investigate the effects of tank waste chemistry on radioactive waste storage tank corrosion. Radioactive waste is stored in underground storage tanks that contain a combination of salts, consisting primarily of sodium nitrate, sodium nitrite and sodium hydroxide. The USDOE, Office of River Protection at the Hanford Site, has identified a need to conduct a laboratory study to better understand the effects of radioactive waste chemistry on the corrosion of waste storage tanks at the Hanford Site. The USDOE science need (RL-WT079-S Double-Shell Tanks Corrosion Chemistry) called for a multi year effort to identify waste chemistries and temperatures within the double-shell tank (DST) operating limits for corrosion control and operating temperature range that may not provide the expected corrosion protection and to evaluate future operations for the conditions outside the existing corrosion database. Assessment of corrosion damage using simulated (non-radioactive) waste is being made of the double-shell tank wall carbon steel alloy. Evaluation of the influence of exposure time, and electrolyte composition and/or concentration is being also conducted. (author) [es

  9. Radiation hardening: study of production velocity and post-irradiation recovery of defect clusters produced by neutron irradiation at 77 K

    International Nuclear Information System (INIS)

    Gonzalez, Hector C.; Miralles, Monica T.

    1999-01-01

    This work includes three basic studies using radiation hardening of Cu single crystals irradiated at 77 K in the RA-1-reactor of CNEA: 1) The initial of a production curve of defect clusters originated during radiation until 5.2 x 10 20 n m 2 . The shape of the curve is compared with those obtained from measurement of resistivity increased (Δρ) with neutronic doses (φt) and the acceptance of the linear dependency of Δρ with Frenkel Pairs concentration (PFs); 2) The isochronal hardening recovery in the temperature interval of stage V (T > 450 K). The existence of the sub-stages Vb (∼ 550 K) and Vc (∼ 587 K), determined for the first time from hardening measurements, are shown and compared with results obtained by other techniques; 3) Isothermal recoveries performed in the temperature interval of the sub-stage Vc to determine phenomenologically the apparent activation energy of the sub-stage. The value obtained was in agreement with the energy for Cu vacancies auto diffusion. (author)

  10. Avañe’e, ñe’e tavy, karai ñe’e: escolarização do guarani e diglossia no Paraguai

    Directory of Open Access Journals (Sweden)

    Sebastião Peres

    2012-07-01

    Full Text Available  O Paraguai apresenta uma situação de profunda desigualdade social: 10% da população detém 42% da riqueza; 40% da população detém 10% da riqueza. Vinculada a isto, apresenta uma situação de diglossia: 39,2% dos paraguaios são monolingües em guarani e 6,4% monolingües em castelhano. Porém, a escola sempre utilizou como língua de ensino o castelhano, gerando elevados índices de insucesso escolar. Com a oficialização do guarani em 1992, intensificou­-se a discussão sobre qual modalidade utilizar na escola: o jopara, guarani interferido pelo castelhano, utilizado cotidianamente, ou o guaraniete, guarani puro, acadêmico. A identificação do guarani como língua da pobreza provoca rejeições quanto à sua escolarização. No passado, o castelhano era considerado a língua dos senhores, e o guarani a língua do povo. A escolarização do guarani pode resultar na sua senhorização.Palavras-chave: língua guarani, Paraguai.   Abstract Paraguay presents a situation of deep social inequality: 10% of its population owns 42% of the country richness, while 40% of its population owns no more than 10% of the country richness. Linked to this, it presents a situation of diglossia: 39,2% of Paraguayans speak only guaranian and 6,4% speak only Castilian. In spite of this situation, the school system has always used Castilian as the teaching language, which caused high rates of school failure. After the officialization of the guaranian language in 1992, the discussion on which modality should be used in the school increased: the jopara, a guaranian intervened by Castilian, which is used daily, or guaraniete, a pure academic guaranian. Guaranian identification as poor people language gives rise to rejections as to its use in school. In the past, Castilian was considered the masters' language, while guaranian was seen as the language of underlings. The schooling of guaranian, that is, its introduction into school, may mean its masterization

  11. The quality of democracy in Paraguay: progress on winding roads La calidad de la democracia paraguaya: un avance sobre caminos tortuosos

    Directory of Open Access Journals (Sweden)

    Mikel BARREDA

    2011-03-01

    Full Text Available Within the framework of growing concern for analyzing the quality of young democracies, this article focuses on the Paraguayan case. A democracy sometimes neglected by the academic literature. However, Paraguay is drawing attention as a consequence of Colorado’s Party defeat (in office since 1947 in the 2008 presidential election. A theoretical and methodological thinking about the concept of the quality of democracy together with an empirical research have been done in this article. Five essential dimensions have been taken into consideration: political rights and civil liberties; rule of law; accountability; responsiveness and political participation. The main conclusion is that Paraguay has a low quality democracy, far away from the rest of Latin American countries. This statement is backed up by three different explanations that are, at the same time, interlinked. These are the following: socioeconomic factors, features of its own political institutions (above all, the widespread clientelism and, finally, political parties’ interests and strategies.En el marco de una preocupación cada vez mayor por analizar la calidad de las nuevas democracias, este artículo se ocupa de examinar el caso de Paraguay. Se trata de una democracia poco atendida en la literatura especializada aunque su interés está creciendo como consecuencia de la derrota electoral del Partido Colorado (en el poder desde 1947 en las presidenciales de abril de 2008. Para llevar a cabo este trabajo, se parte de una reflexión teórica y metodológica en torno a la noción y la medición empírica de la calidad democrática. Al realizar el análisis de la democracia paraguaya se atiende a cinco dimensiones fundamentales: derechos políticos y libertades civiles, Estado de Derecho, rendición de cuentas, responsiveness y participación. La conclusión general es que es una democracia de baja calidad, distanciada del promedio latinoamericano. Para explicar este bajo nivel de

  12. Identidade cultural e globalização em produções artísticas contemporâneas

    Directory of Open Access Journals (Sweden)

    Lurdi Blauth

    2015-10-01

    Full Text Available O presente estudo aborda alguns aspectos sobre identidade cultural e globalização, a partir das proposições poéticas dos artistas Javier & Erika, destacando as obras Inforncof e Haciendo Mercado, que foram apresentadas na 8ª Bienal do Mercosul, em 2011. Essas obras propõem reflexões críticas sobre a questão da identidade cultural da América Latina do póscolonialismo, apontando as diferenças reais e simbólicas presentes na cultura paraguaia, em oposição às tradições indígenas e práticas capitalistas. O aporte teórico articula o pensamento de Nestor Garcia Canclini sob a perspectiva da globalização em suas esferas política, econômica e cultural, problematizando a ampliação do horizonte local e nacional. Stuart Hall trata a questão da identidade no contexto social e cultural, cujas rápidas mudanças, se não houver adaptação, instauram a crise de identidade pelo descentramento, deslocamento e também a sua fragmentação. ABSTRACT The present paper approaches some aspects regarding cultural identity and globalization, out of poetical propositions of the artists Javier & Erika, emphasizing the works Inforncof e Haciendo Mercado, presented at the Mercosul 8th Biennial, in 2011. Those works propose critic reflexions on the post-colonialism Latin America cultural identity matter, pointing to the real and the symbolic differences present in Paraguayan culture, in opposition to the indigenous traditions and capitalist practices. The theoretical basis articulates the thought of Nestor Garcia Canclini under the globalization perspective, in its political, economical and cultural spheres, questioning the local and national horizon broadening. Stuart Hall discusses the matter of identity in the social and cultural context, whose fast changes, if there is no adaptation, create an identity crisis through its destabilization, displacement and fragmentation. KEYWORDS Culture, cultural identity, globalization, contemporary art.

  13. [The Third World before the Third World, 1770-1870].

    Science.gov (United States)

    Batou, J

    1992-01-01

    in Egypt and Paraguay anticipated the Japanese experience in certain respects and would have had a good chance of success hand not devastating warfare destroyed the economics of both countries. The author explores 5 questions to assess the relevance of the Paraguayan and Egyptian model: 1) whether the natural environment of the 2 countries offered favorable conditions for modern factories, 2) whether peripheral states had the resources for financing a true industrialization policy, 3) whether the sociocultural context of the 2 countries would have permitted them to develop an industrial culture, 4) whether the West would have tolerated the competition implied by their economic development and industrialization, and 5) whether this model of industrialization was adjusted to the specific conditions of the periphery.

  14. EL ACRE Y LOS "ASUNTOS DEL PACÍFICO: BOLIVIA, BRASIL, CHILE Y ESTADOS UNIDOS, 1898-1909

    Directory of Open Access Journals (Sweden)

    Cristián Garay Vera

    2008-12-01

    Full Text Available Este trabajo sitúa el problema de la guerra del Acre en un contexto multilateral, reconociendo la vigencia del equilibrio de poder como parte del razonamiento de la conducción de las políticas exteriores en juego. Se aplica el concepto de frontera de F. J. Turner, para explicar cómo las fronteras permeables pusieron a Brasil y Bolivia en confrontación, por la maniobra boliviana de configurar una concesión a inversionistas estadounidenses, británicos y franceses, que fue interpretada por Brasil como una maniobra imperialista de Estados Unidos. Entones Brasil se acercó a Chile, y afrontaron juntos los problemas del Acre y de Antofagasta, que derivaron en las redacciones de los tratados de Petrópolis (1903 y de Paz y Amistad (1904. El artículo postula que Bolivia procedió de esta forma para impedir el avance brasileño, peruano y paraguayo sobre sus fronteras, y que la búsqueda del paraguas estadounidense fue una idea que Bolivia gestó para compensar el desequilibrio de poder.This work considers the Acre War as part of a multilateral context where the equilibrium of power was important in the reasoning behind the establishment of foreign relations. It uses the frontier concept developed by F. J. Turner to explain why their open frontier put Brazil and Bolivia in confrontation. This happened because of the Bolivian strategy of granting land to investors from the United States, Great Britain and France, which was interpreted by Brazil as an imperialist action promoted by the United States. This explains why Brazil established a cióse relationship with Chile to confront together their problems in Acre and Antofagasta, which led to the drafting of the Petrópilis (1903 and Paz y Amistad (1904 treaties. The article argues that Bolivia proceeded this way to avoid a Brazilian, Peruvian or Paraguayan territorial advance, seeking the support of the United States to compénsate the imbalance of power.

  15. «Yvy marae’y»: the conflict of the State with the indigenous villages in Paraguay «Yvy marae’y»: el conflicto del estado con los pueblos indígenas en Paraguay

    Directory of Open Access Journals (Sweden)

    Sarah Patricia CERNA VILLAGRA

    2012-06-01

    Full Text Available The 1992 Constitution recognizes the existence of people prior to the formation of the Paraguayan State and in that sense it gives them certain rights that protect their territory, identity and culture. This declaration of purpose constitutes a break with the previous model of dominant and exclusionary state policies toward indigenous peoples. However, the rights of indigenous peoples continue without respected, in spite of the space won in terms of social and political organizations, the struggle continues in this constant «search of the land without evil». This paper aims to describe the current situation of indigenous peoples from an analysis of access to public services, economic status, employability, employment discrimination and public policy. It also attempts to explain the factors that have influenced in the lack of consolidation of the indigenous movement in Paraguay.La Constitución Nacional de 1992 reconoce la existencia de pueblos anteriores a la conformación del Estado paraguayo y, en ese sentido, les otorga una serie de derechos que protegen sus territorios, identidad y cultura. Esta declaración de intenciones constituye un quiebre con respecto al modelo anterior de políticas estatales dominantes y excluyentes hacia los pueblos indígenas. No obstante, los derechos de los pueblos indígenas siguen sin respetarse, y a pesar de los espacios ganados en cuanto a organizaciones sociales y políticas, la lucha continúa en esa búsqueda constante de la tierra sin mal. Este trabajo busca describir la situación actual de los pueblos indígenas a partir de un análisis del acceso a los servicios públicos, la situación económica, la empleabilidad, la discriminación laboral y las políticas públicas. Asimismo, intenta explicar los factores que han influido en la escasa consolidación del movimiento indígena en Paraguay.

  16. Regiones metropolitanas binacionales en el Mercosur

    Directory of Open Access Journals (Sweden)

    Antonio Daher

    2000-09-01

    Full Text Available El artículo analiza el intercambio de bienes a través del corredor internacional de comercio del Mercosur que relaciona a São Paulo, Buenos Aires y Santiago/Valparaíso. Se demuestra, en el contexto de los megamercados sustentados en microrregiones de mayor competitividad, y de sus tendencias a un creciente comercio al interior del bloque económico junto a las nuevas corrientes intrarregionales de inversión externa, que el comercio registra un fuerte sesgo industrial y denota una importante complementación productiva a través del predominio de bienes intermedios y de capital en las importaciones recíprocas. Esta situación concuerda con la alta urbanización del corredor y, más aún, con su estructuración a partir de las metrópolis referidas. Se concluye perfilando la emergencia de tres regiones metropolitanas binacionales: la Paulista, brasileño-paraguaya; la Rioplatense, argentino-uruguaya; y la Interandina, chileno-argentina. Estas regiones transfronterizas, requieren de una gestión regional a la vez subnacional y supranacional, articulando la descentralización con la globalizaciónThis article analyzes trade along the international commercial corridor linking São Paulo, Buenos Aires, and Santiago-Valparaíso. In the context of the megamarkets supported the most competitiveness microregions and their tendency toward growing trade within the economic bloc along with new intra-regional currents of external investment, the article demonstrates the marked industrial profile of that trade. The dominance of intermediate and capital goods among these reciprocal imports shows that the economies within Mercosur complement each other in production. This situation is in line with the corridor’s high urbanization, and even more so with the key role of the metropolises in shaping the corridor. In conclusion, the article outlines the emergence of three binational metropolitan regions: that of São Paulo, Brasilian-Paraguayan; that of the

  17. A short environmental report on 'De Las Gallinas island'

    International Nuclear Information System (INIS)

    Romero, Claudio; Gho, Carlos J.; Quiroga, Juan J.; De Nicola, Juan; Rico, Nestor; Isnardi, Edgardo; Malagamba, Eduardo

    2003-01-01

    A brief environmental state report of 'De Las Gallinas island' is presented, based on a short ocular inspection and also on the analysis of available documents. This island was recently transferred from the National Atomic Energy Commission (CNEA) to the patrimony of San Carlos de Bariloche City. De Las Gallinas is the most oriental island of the Nahuel Huapi lake. Its surface totals about 13.5 hectares, densely colonized with vegetation. Since 1951 it has been under the domain of the CNEA which declared it as a Protected Untouchable Area. This condition has guaranteed a minimum level of human intervention, even if there is a clear evidence of a historic use of its beaches for recreational sailing. Several characteristics give this island a particular value in terms of its geomorphology. Because of its insular character and its small surface, no significant facts are expected to be related to its fauna. The structural complexity of the vegetation, with the four easily identifiable layers occurring in De Las Gallinas, corresponds to the so called 'Compact Humid Sub Alpine Mild-Cold Forest', where the almost exclusive and dominant presence of 'Austrocedrus chilensis' (cypress) in the upper layer has a particular interest. In order to give a numerical value to the vegetation, the methodology proposed by Devillez et al. (1995) was used, modified by Rapoport y Ghermandi (2002), who add a new indicator of the ecological worth: the degree of relative rareness of the Unit under observation. A value of 9,8 was obtained. As a frame of reference the ecological value of one of the most significant forests of cypress in the Traful region was evaluated to be 9.2 by the authors just mentioned. This fact shows that the state of conservation and the ecological value of De Las Gallinas Unit is very high, which is much more important if we consider that the comparison is made between insular and continental sites. The excellent quality of the forest is probably related to the absence

  18. Quality controls in two mammography of the Institute of Oncology Angel H. Roffo - C.A.B.A - Buenos Aires

    International Nuclear Information System (INIS)

    Pirchio, R.; Sánchez, H.; Lerman, Y.; Ángel H. Roffo, Av. San Martín 5481 - C1417DTO, C.A.B.A, Buenos Aires (Argentina))" data-affiliation=" (Universidad de Buenos Aires, Instituto de Oncología Ángel H. Roffo, Av. San Martín 5481 - C1417DTO, C.A.B.A, Buenos Aires (Argentina))" >Casal, M.

    2013-01-01

    National Atomic Energy Commission of Argentina (CNEA) under the Technical Cooperation Project with the International Atomic Energy Agency (IAEA) “ARG/6/013 Implementing a Dosimetric System in Diagnostic Radiology to Minimize Doses Received by Patients” for the biennium 2012-2013, is carrying on courses for physicians, technicians and physicist working on radiodiagnost and studies about quality control in mammography equipment. The goal of this project is minimizing the dose received by patients who undergo diagnostic studies X-rays. The first controls were performed at the Institute of Oncology Angel H. Roffo of C.A.B.A – Buenos Aires. The mammographs used were: the digital FujiFilm Amulet and ther hybrid General Electric (GE) Senographe DMR, out of order. The latter was used to adjust protocols and equipment. Quality controls of mamography equipments were done according to the following IAEA documents: Technical Reports Series (TRS) N° 457, Technical Document (TECDOC) -1517 and IAEA Human Health Series N° 17. Among the checks performed are mentioned: mechanical (visual inspection), compression, compression thickness, mean glandular dose for Mo-Mo 28 kV and Mo-Rh 28 kV, repeatability and linearity, half-value layer, accuracy and repeatability voltage, leakage radiation and focus- tray distance. The Radcal calibrated equipment, used for the measurements was provided by the IAEA as part of the project. They are: reader, chamber for mammography, chamber for leakage, voltage meter and other elements such as aluminum plates. In addition, dosimeters TLDs rods 700 and 200 of the Personal Dosimetry Laboratory - CNEA, and dosimetry films of the Medical University - Personal Dosimetry Laboratory and Radiological Protection - were calibrated in the GE mammograph in Mo-Mo for the incident air kerma values of 2.28, 4.58, 6.38, 9.15, 10.96, 14.71 and 18.34 mGy. For both TLDs dosemeters, the effective energy response has been studied for: 14.4, 15, 15.4, 15.7 y 16.1 kev

  19. Social responsibility at a semi-industrial irradiation plant. Experience statements of ISO 26000 implementation in a nuclear facility class I

    International Nuclear Information System (INIS)

    Docters, Andrea S.; Lucuix, Maria B.

    2009-01-01

    This presentation is located in the area of radioisotopes and radiation, CNEA. Its main scope is to describe the implementation process of the international standard ISO 26000 at an irradiation facility. This project began as such by the end of 2007 with the objectives established at the Semi-Industrial Irradiation Facility ('Planta de Irradiacion Semi-Industrial'), and it consists on establishing a systematization practice and the subsequent diffusion of its results in order to spread the experience gained. The proposed standard has seven fundamental principles which gather under the term social responsibility. This project was agreed with stake holders directly involved with the facility and it is a continuum of interrelated knowledge. The fact of starting the implementation of this international standard in a relevant facility was meant to be applied in a central activity of the CNEA. The Semi-Industrial Irradiation Facility located at the Ezeiza Atomic Center has the necessary elements for its implementation and will provide after completion of the project, information of interest in order to replicate the experience in other areas. In the case of ISO 26000 the established order is considered appropriate for its application in the same government organization 'to contribute to sustainable development, health and welfare of society'. The concept of Social Responsibility, which ends its consolidation in the nineties, is a conjunction of knowledge and developments. The idea of sustainable development-oriented concept nurtured the current concern especially about the environment, linked to the Brundtland Commission Report of the late eighties which was later accepted by the Earth Summit at Rio de Janeiro in 1992. Meanwhile, the unions through their representatives played a pivotal role in linking the environment to the social perspective and interest to society, widely accepted nowadays, on the concept that appropriate measures for the environment can be extended

  20. PREFACE: 14th Latin American Workshop on Plasma Physics (LAWPP 2011)

    Science.gov (United States)

    Bilbao, Luis; Minotti, Fernando; Kelly, Hector

    2012-06-01

    , Venezuela Leopoldo Soto, Chile Michael Tendler, Sweden Carlos Varandas, Portugal Henry Riascos, Colombia Ivan Vargas-Blanco, Costa Rica Local Organizing Committee Luis Bilbao (Chairman) Fernando Minotti (Vice-Chairman) Luis Bernal, UNMDP Alejandro Clausse, PLADEMA-CNEA Graciela Gnavi, INFIP, CONICET-UBA Fausto Gratton, INFIP, CONICET-UBA Diana Grondona, INFIP, CONICET-UBA Héctor Kelly, INFIP, CONICET-UBA Adriana Márquez, INFIP, CONICET-UBA María Milanese, UNCPBA César Moreno, INFIP, CONICET-UBA Sponsors Instituto de Física del Plasma (INFIP) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Comisión Nacional de Energía Atómica (CNEA) Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) Centro Latino-Americano de Física (CLAF) Universidad Nacional de Mar del Plata (UNMP) Universidad Nacional del Centro de la Provincia de Buenos Aires (UNICEN) Academia Nacional de Ciencias de Buenos Aires (ANCBA) Conference poster

  1. Food irradiation 2009; Irradiacion de alimentos: situacion en 2009

    Energy Technology Data Exchange (ETDEWEB)

    Narvaiz, Patricia [Comision Nacional de Energia Atomica, Ezeiza (Argentina). Gerecia de Aplicaciones y Tecnologia de Radiaciones

    2009-01-15

    Food irradiation principles; its main applications, advantages and limitations; wholesomeness, present activities at Ezeiza Atomic Centre; research coordinated by the International Atomic Energy Agency; capacity building; and some aspects on national and international regulations, standards and commercialization are briefly described. At present 56 countries authorize the consumption of varied irradiated foods; trade is performed in 32 countries, with about 200 irradiation facilities. Argentina pioneered nuclear energy knowledge and applications in Latin America, food irradiation included. A steady growth of food industrial volumes treated in two gamma facilities can be observed. Food industry and producers show interest towards new facilities construction. However, a 15 years standstill in incorporating new approvals in the Argentine Alimentary Code, in spite of consecutive request performed either by CNEA or some food industries restricts, a wider industrial implementation, which constitute a drawback to future regional commercialization in areas such as MERCOSUR, where Brazil since 2000 freely authorize food irradiation. Besides, important chances in international trade with developed countries will be missed, like the high fresh fruits and vegetables requirements United States has in counter-season, leading to convenient sale prices. The Argentine food irradiation facilities have been designed and built in the country. Argentina produces Cobalt-60. These capacities, unusual in the world and particularly in Latin America, should be protected and enhanced. Being the irradiation facilities scarce and concentrated nearby Buenos Aires city, the possibilities of commercial application and even research and development are strongly limited for most of the country regions. (author);Se describen someramente los principios del metodo de irradiaciones de alimentos; sus principales aplicaciones, ventajas y limitaciones, inocuidad; las actividades actuales en el Centro

  2. Radiation protection in BNCT patients

    International Nuclear Information System (INIS)

    Blaumann, Hernan R.; Scharnichia, E.; Levanon, I.; Fernandez, C.; Facchini, Guillermo; Longhino, J.; Calzetta, Osvaldo; Pereira, M.

    2008-01-01

    Full text: Boron Neutron Capture Therapy (BNCT) is a technique that selectively targets cancer cells while sparing normal tissues by virtue of the differential uptake of a 10 B carrier compound in tumor. The National Atomic Energy Commission (CNEA) and the Oncology Institute 'Angel H. Roffo' (IOAR) began a BNCT programme in 2003 for treating cutaneous skin melanomas in extremities. The neutron beam used is the hyperthermal one developed at the RA-6 Reactor of the Bariloche Atomic Centre (CAB). The prescribed dose is delivered in one fraction and therefore patient positioning and knowledge of the dose received by normal tissue are crucial. 10 irradiations have been done since 2003, all of them in legs and feet and the dose prescription was determined by the maximum tolerable skin dose. Due to the characteristics of this treatment the patient body might be exposed not only to the primary beam but also to the secondary photon beam produced by neutron capture at the target itself. Thus a patient radiation-monitoring plan was implemented in order to evaluate the gamma dose delivered to sensible organs of each patient. An acrylic water-filled whole body phantom was used for preliminary gamma dose and thermal neutron flux measurements at positions related to patient's body sensible organs considering tentative patient positions. The beam port shielding was, in this way, optimized. TLD-700 and Manganese foils were used for gamma and thermal neutron detection. The TLD-700 thermal neutron response was previously evaluated by using the in-phantom beam dosimetry characterization. In-vivo dosimetry with TLD is routinely implemented in order to evaluate gamma dose to sensible organs of each patient. These organs are chosen depending on its distance from the zone to be irradiated and its radio-sensibility. All TLDs have been positioned well outside the irradiation field. Maximum gamma dose received outside the radiation field in healthy tissues was well below tolerance dose for

  3. Neutronic calculations of hexagonal lattice nuclear reactors: Modelling of the CAREM-25 reactor

    International Nuclear Information System (INIS)

    Pacio, Julio Cesar

    2008-01-01

    This work was carried out in the frame of the Cnea CAREM-25 project (Central Argentina de Elementos Modulares).This project involves the development and construction of an argentinian design nuclear reactor for producing electricity. It's a PWR type (light water moderated and enriched U02 fueled) integrated reactor in an hexagonal lattice.The total power of this prototype is 100 MW thermal. In this frame, the main objective of this work is to consolidate and validate a neutronic line of calculus which can be applied to the CAREM-25 core.At a first analysis at cell level, the different fuel elements were modeled with the Dragon code, obtaining homogenised and condensed cross sections.Then a core level analysis with the Puma code was performed at full power condition and room temperature. A comparison of the obtained results is needed.For this reason, a Monte Carlo analysis (at room temperature) was performed.Also a validation of the Dragon code was carried out on the base of experimental data of WWER type lattices (similars to CAREM).The confidence on the results is then granted and their uncertainties were quantified.The Dragon-Puma line of calculus is then established and the main objective of this work is achieved. A full neutronic analysis should be followed by thermohydraulics calculations in an iterative procedure, and it would be the objective of future works.Finally, a burnup analysis was performed, at cell and core level.The design condition for extraction burnup and fuel cycle duration were verified. [es

  4. Radio environmental study and chemical characterization of golden water in Barker caves

    International Nuclear Information System (INIS)

    Kundt, Miriam S.; Cifarelli, Fernanda; Furnari, Juan C.; Cabanilla, Edgardo D.; Eppis, Maria R.

    2008-01-01

    Full text: It is possible to find in the northern mountains of Tandilia, caves of a natural or anthropic origin. These caves are often visited by tourists, explorers and scientists. An exclusive feature up to now, at least in the international literature, is the deposits of 'golden water'. In our country, these waters were described for the first time in 1897, as waters with fluorescence that might be caused by algae. Due to the fact that some inhabitants suspected that the water could contain uranium, a study was carried out at the lab of physical and chemical control of the CNEA by means of total reflection X-ray fluorescence and it determined a complete absence of uranium, although it informed on the presence of potassium, calcium, iron, titanium, manganese, zinc and strontium as majority elements, being the presence of titanium rather unusual in the water. The objective of the present paper is to study the composition of the chemical elements that constitute this kind of water and the determination of the levels of natural radionuclides present in some caves in Tandilia, especially radon gas. To that end, new samples of water have been taken and a new study of X-ray fluorescence and X-ray diffraction is being carried out that will lead to the confirmation of titanium and its quantification, as well as the chemical composition of the water. On the other hand, the levels of radon gas and other radionuclides are assessed by means of a liquid scintillation counting. The results of these studies will allow to determine if the tour guides of the caves should be protected from radiation and get to know the chemical composition of the golden water in order to understand its origin and its possible biotechnological implications. (author)

  5. Interactive computer codes for education and training on nuclear safety and radioprotection

    International Nuclear Information System (INIS)

    Leszczynski, Francisco

    2008-01-01

    Two interactive computer codes for education and training on nuclear safety and radioprotection developed at RA6 Reactor Division-Bariloche Atomic Center-CNEA are presented on this paper. The first code named SIMREACT has been developed in order to simulate the control of a research nuclear reactor in real time with a simple but accurate approach. The code solves the equations of neutron punctual kinetics with time variable reactivity. Utilizing the timer of the computer and the controls of a PC keyboard, with an adequate graphic interface, a simulation in real time of the temporal behavior of a research reactor is obtained. The reactivity can be changed by means of the extraction or insertion of control rods. It was implemented also the simulation of automatic pilot and scram. The use of this code is focalized on practices of nuclear reactor control like start-up from the subcritical state with external source up to power to a desired level, change of power level, calibration of a control rod with different methods, and approach to critical condition by interpolation of the answer in function of reactivity. The second code named LICEN has been developed in order to help the studies of all the topics included in examination programs for obtaining licenses for research reactor operators and radioprotection officials. Using the PC mouse, with an adequate graphic interface, the student can gradually learn the topics related with general and special licenses. The general option includes nuclear reactor engineering, radioprotection, nuclear safety, documentation and normative. The specific option includes mandatory documentation, description of the installation and task on normal and emergency situations. For each of these topics there are sub-items with all the relevant information. The objective of this code is to joint in one electronic place a large amount of information which usually it is disseminated on difficult to find separated papers. (author)

  6. Commissioning of the laboratory of Atucha II NPP. Implementation and optimization of analytical techniques, quality aspects

    International Nuclear Information System (INIS)

    Schoenbrod, Betina; Quispe, Benjamin; Cattaneo, Alberto; Rodriguez, Ivanna; Chocron, Mauricio; Farias, Silvia

    2012-09-01

    Atucha II NPP is a Pressurized Vessel Heavy Water Reactor (PVHWR) of 740 MWe designed by SIEMENSKWU. After some years of delay, this NPP is in advanced construction state, being the beginning of commercial operation expected for 2013. Nucleoelectrica Argentina (N.A.S.A.) is the company in charge of the finalization of this project and the future operation of the plant. The Comision Nacional de Energia Atomica (C.N.E.A.) is the R and D nuclear institution in the country that, among many other topics, provides technical support to the stations. The Commissioning Chemistry Division of CNAII is in charge of the commissioning of the demineralization water plant and the organization of the chemical laboratory. The water plant started operating successfully in July 2010 and is providing the plant with nuclear grade purity water. Currently, in the conventional ('cold') laboratory several activities are taking place. On one hand, analytical techniques for the future operation of the plant are being tested and optimized. On the other hand, the laboratory is participating in the cleaning and conservation of the different components of the plant, providing technical support and the necessary analysis. To define the analytical techniques for the normal operation of the plant, the parameters to be measured and their range were established in the Chemistry Manual. The necessary equipment and reagents were bought. In this work, a summary of the analytical techniques that are being implemented and optimized is presented. Common anions (chloride, sulfate, fluoride, bromide and nitrate) are analyzed by ion chromatography. Cations, mainly sodium, are determined by absorption spectrometry. A UV-Vis spectrometer is used to determine silicates, iron, ammonia, DQO, total solids, true color and turbidity. TOC measurements are performed with a TOC analyzer. To optimize the methods, several parameters are evaluated: linearity, detection and quantification limits, precision and

  7. Overview of Twenty Years of Radiation and Tissue Banking Activity in Argentina

    International Nuclear Information System (INIS)

    Kairiyama, E.

    2015-01-01

    Radiation sterilization of human tissues in Argentina was a consequence of health care products sterilization by gamma radiation. Radiation technology was implemented in 1970 when the first multipurpose gamma facility was built at the Ezeiza Atomic Centre of CNEA. Organ and tissue transplantation is a well established effective therapy that saves lives and significantly improves the quality of life. Ionizing radiation is used for sterilization in order to provide clinically safe tissue for therapeutic purposes of implantation in every patient in need. Argentina radiation and tissue banking activity started in 1993 with the establishment of two tissue banks using radiation under the IAEA programme of technical cooperation, a skin bank and a bone one. Additionally to this start, other tissue banks have adopted tissue sterilization by irradiation. The compatible tissues sterilized with this methodology are mainly skin (frozen, glycerolized), bone (lyophilized, frozen), and amniotic membrane (glycerolized, frozen, dehydrated). The donation and transplant of human organ, tissue and cells is regulated and coordinated by the National Institute Unique Central Coordinator of Ablation and Implant (INCUCAI). In regards to radiation and nuclear safety, physical protection and nuclear non-proliferation issues are regulated and contorted by the Nuclear Regulatory Authority (ARN). Eight tissue banks use gamma radiation for sterilization of human tissues (6 musculoskeletal, 1 skin and 1 amniotic membrane). Argentina has participated actively in several IAEA projects regarding radiation and tissue banking program, and it has been selected by the IAEA to host the Regional Training Centre for the Latin American region. The following activities were implemented: regional training courses in Buenos Aires, face to face (five) and virtual (four) modalities; collaboration on several materials related to tissue banking and radiation sterilization of tissue allograft, codes of practice for

  8. Revisiting homogeneous suspension reactors for production of radioisotopes

    International Nuclear Information System (INIS)

    Pasqualini, E.E.

    2010-01-01

    Some 50 years ago in Geneva Conferences I, II and III (1955. 1958 and 1964) on the Peaceful Uses of Atomic Energy, and also in Vienna Symposium on Reactor Experiments (1961), several papers where presented by different countries referring to advances in homogeneous suspension reactors. In particular the Dutch KEMA Suspension Test Reactor (KSTR) was developed, built and successfully operated in the sixties and seventies. It was a 1MWth reactor in which a suspension (6 microns spheres) of mixed UO 2 /ThO 2 in light water was circulated in a closed loop through a sphere-shaped vessel. One of the basic ideas on these suspension reactors was to apply the fission recoil separation effect as a means of purification of the fuel: the non-volatile fission products can be adsorbed in dispersed active charcoal and removed from the liquid. Undoubtedly, this method can present some advantages and better yields for the production of Mo-99 and other short lived radioisotopes, since they have to be extracted from a liquid in which practically no uranium is present. Details are mentioned of the different aspects that have been taken into account and which ones could be added in the corresponding actualization of suspension reactors for radioisotope production. In recent years great advances have been made in nanotechnology that can be used in the tailoring of fuel particles and adsorbent media. Recently, in CNEA Buenos Aires, a new facility has been inaugurated and is being equipped and licensed for laboratory experiments and preparative synthesis of nuclear nanoparticles. RA-6 and RA-3 experimental reactors in Argentina can be used for in-pile testing. (author)

  9. Dosimetric studies of the eye lens using a new dosemeter – Surveys in interventional radiology departments

    International Nuclear Information System (INIS)

    Pirchio, R.; Sánchez, H.; Domazet, W.

    2014-01-01

    During interventional radiology (IR) and cardiology (IC) procedures, medical staff can receive high doses to their eye lenses. The Retrospective Evaluation of Lens Injuries and Dose study organized in Argentina in 2010 found incipient opacity in 50% of IC physicians and 41% of IC technicians/nurses. These results, added to the recommendations of the International Commission on Radiological Protection, which lowered their former occupational equivalent dose limit for the lens, led us to assess the eye lens dose, Hp(3), during interventional procedures. To this end, a new dosemeter was designed and calibrated at the National Atomic Energy Commission of Argentina to evaluate Hp(3). Personal dose equivalent (Hp(10)), and Hp(3) were assessed for 3 months in two IC and IR departments. An Alderson phantom was used to simulate monthly exposures of five occupational staff members. Hp(3) and Hp(10) were obtained monthly for 14 occupational staff members exposed to 121 IR and IC procedures. We concluded that the annual effective dose and Hp(3) were lower than 0.3 and 10 mSv, respectively and the average cumulative Hp(3) for working life was lower than 400 and 200 mSv for physicians and technicians/scrub nurse, respectively. An occupational annual dose constraint of 0.3 mSv was calculated. - Highlights: • An eye lens dosimeters was designed at the Personal Dosimetry Laboratory of CNEA. • A successful dosimetric survey in two interventional departments was done. • The annual effective dose and the annual eye lens dose are lower than the ICRP dose thresholds. • In order to reduce doses actions should be promoted to maximize radiation protection

  10. Elaboration of mini plates with U-Mo for irradiation in a high flux reactor

    International Nuclear Information System (INIS)

    Pasqualini, Enrique E.

    2005-01-01

    Full text: International new efforts for the reconversion of HEU in research, testing and radioisotopes production reactors, have greatly incremented U-Mo fuels qualification activities. These qualifications require the resolution of undesired interaction at high fluxes between UMo particles and the aluminum matrix in the case of dispersed fuels and the development of U-Mo monolithic fuels. These efforts are being manifested in the planning and execution of additional series of irradiation tests of mini plates and full size plates. Recently, CNEA has elaborated mini plates with different proposals for the irradiation at the ATR reactor (250 MWTH, maximum thermal neutron flux 10 15 n.cm -2 .seg -1 ) at Idaho National Laboratory, USA. Uranium 7% (w/w) molybdenum (U-7Mo) particles were coated with silicon. Chemical vapour deposition (CVD) of silane and high temperature diffusion of silicon were used. Hydrided, milled and dehydrated (HMD) particles heat treated at 1000 C degrees during four hours and centrifugal atomized powder were coated and the results compared. Mini plates were elaborated with both kinds of particles. Mini plates were also elaborated with U-7Mo and silicon particles dispersed in the aluminium matrix. Monolithic mini plates were also developed by co lamination of U-7Mo with a Zircaloy-4 cladding. The different steps of this process are detailed and the method is shown to be versatile, can be easily scaled up and is performed with small modifications of usual equipment in fuel plants. The irradiation experiment is called RERTR-7A, includes a total of 32 mini plates and it is planed to finalize by mid 2006. (author) [es

  11. CARA Project: development of the advanced ULE fuel element for heavy water nuclear power plants

    International Nuclear Information System (INIS)

    Brasnarof, Daniel O.; Marino, Armando C.; Florido, Pablo C.; Munoz, C.; Bianchi, Daniel R.; Giorgis, Miguel A.

    2006-01-01

    The CARA Project (Spanish acronym of Combustible Avanzado para Reactores Argentinos) is a national fuel element technology development, compatible with our nuclear power plants (Atucha I, Embalse and Atucha II). It takes into account the experience obtained in our nuclear organisations (CNEA-CONUAR-NASA). The goal of the CARA fuel element is the performance improvement for those reactors and the enhancing of their normal operative conditions. The CARA design allows the burnup extension by using 52 rods of the same diameter. Likewise it keeps good thermo-hydraulic behaviour. The fuel bundle can be directly used in nuclear power plants with horizontal channels. By using an additional system it can be installed in the PHWR with vertical channels. The expected profits, by the use of the CARA in our reactors, broadly guaranty the recovery of the fund for its development, due to a reduction of the NPP fuels and back end cost. We estimate a reduction in the generation cost between 20 or 25 % in relation to the present one if we use 0.85 or 0.90% SEU (Slightly Enriched Uranium). The use of the CARA fuel in our reactors will also reduce the amount of spent fuel to be treated. The shortening could be between 17 to 27 % in Atucha I in relation to the present ULE (0.85%), between 38 to 46% for Embalse, and 45 to 53% for Atucha II. The mechanical behaviour and hydraulic compatibility have been verified. Several CARA prototypes were fabricated with a new design of the end plate and with new processes for the welding for the rods. We present in this paper the current status of the CARA fuel element development. (author) [es

  12. X-rays individual dose assessment using TLD dosimeters

    International Nuclear Information System (INIS)

    Salas, Carlos

    2008-01-01

    This paper describes the methodology used in Embalse NPP for measuring individual X-ray dose in dentists and radiologists, who work in areas near the plant. Personnel is provided with TLD personal dosimeters for thoracic use, as well as TLD ring dosimeters. This individual X-ray dosimetry is fundamental in order to know the effective energy coming from the radiation field, since the dosimetry factors depend on it. On the other hand, the response of the TLD crystals also depends of the effective energy; this accentuates the problem when assessing the individual dose. The X-ray dosimeter must simultaneously determine the value of the effective energy and the corresponding dose value. The basic principle for determining effective energy is by using at least two different TLD materials covered by filters of different thickness. The TLD materials used have totally energy responses. Therefore, different readouts from each of the crystals are obtained. The ratio between both readouts provides a factor that depends of the effective energy but that is 'independent' from the exposure values irradiated to the dosimeter. The Personal TLD dosimeter currently in use is Bicron-Harshaw. It comprises a carrier model 8807. This carrier contains a card model 2211 which groups two TLD 200 crystals and two TLD 100 crystals. It has internal filters at each side of the TLD 200 crystals. The periodical calibration of these dosimeters consists in the irradiation of some dosimeters with different X-ray energy beams in the National Atomic Energy Commission (CNEA). This dosimeter was used, by the National Regulatory Authority (ARN) in several comparisons, always getting satisfactory results. (author)

  13. 低濃縮ウラン(LEU)からの99Mo製造プロセスに関する調査

    OpenAIRE

    谷本 政隆; Amaya, D.; 青山 征司; 木村 明博; 出雲 寛互; 土谷 邦彦

    2011-01-01

    世界的に99Moの需要が高まる中、最近になって99Moの供給不足が懸念されており、とりわけ99Moを製造しているカナダ等における原子炉の停止による同位体製造にかかわる運転条件の低下、高濃縮ウラン(HEU)ターゲットの入手困難が懸念事項となっている。この課題解決の一助として、HEUを用いず低濃縮ウラン(LEU)を用いる99Mo製造が行われている。INVAP社は、LEUを10年前から99Mo製造施設へ供給している。LEUによる99Mo製造プロセスであり、アルゼンチン原子力委員会(CNEA)が開発したものである。本報告書は、INVAP社と協力して、LEUを原子炉で照射し核分裂(n, f)法を用いた99Mo製造方法について調査したものである。...

  14. Dosimetry and radiobiology at the new RA-3 reactor boron neutron capture therapy (BNCT) facility: Application to the treatment of experimental oral cancer

    Energy Technology Data Exchange (ETDEWEB)

    Pozzi, E. [Research and Production Reactors, National Atomic Energy Commission, Ezeiza Atomic Center (Argentina); Department of Radiobiology, National Atomic Energy Commission, Constituyentes Atomic Center (Argentina)], E-mail: epozzi@cnea.gov.ar; Nigg, D.W. [Idaho National Laboratory, Idaho Falls (United States); Miller, M.; Thorp, S.I. [Instrumentation and Control Department, National Atomic Energy Commission, Ezeiza Atomic Center (Argentina); Heber, E.M. [Department of Radiobiology, National Atomic Energy Commission, Constituyentes Atomic Center (Argentina); Zarza, L.; Estryk, G. [Research and Production Reactors, National Atomic Energy Commission, Ezeiza Atomic Center (Argentina); Monti Hughes, A.; Molinari, A.J.; Garabalino, M. [Department of Radiobiology, National Atomic Energy Commission, Constituyentes Atomic Center (Argentina); Itoiz, M.E. [Department of Radiobiology, National Atomic Energy Commission, Constituyentes Atomic Center (Argentina); Department of Oral Pathology, Faculty of Dentistry, University of Buenos Aires (Argentina); Aromando, R.F. [Department of Oral Pathology, Faculty of Dentistry, University of Buenos Aires (Argentina); Quintana, J. [Research and Production Reactors, National Atomic Energy Commission, Ezeiza Atomic Center (Argentina); Trivillin, V.A.; Schwint, A.E. [Department of Radiobiology, National Atomic Energy Commission, Constituyentes Atomic Center (Argentina)

    2009-07-15

    The National Atomic Energy Commission of Argentina (CNEA) constructed a novel thermal neutron source for use in boron neutron capture therapy (BNCT) applications at the RA-3 research reactor facility located in Buenos Aires. The aim of the present study was to perform a dosimetric characterization of the facility and undertake radiobiological studies of BNCT in an experimental model of oral cancer in the hamster cheek pouch. The free-field thermal flux was 7.1x10{sup 9} n cm{sup -2} s{sup -1} and the fast neutron flux was 2.5x10{sup 6} n cm{sup -2} s{sup -1}, indicating a very well-thermalized neutron field with negligible fast neutron dose. For radiobiological studies it was necessary to shield the body of the hamster from the neutron flux while exposing the everted cheek pouch bearing the tumors. To that end we developed a lithium (enriched to 95% in {sup 6}Li) carbonate enclosure. Groups of tumor-bearing hamsters were submitted to BPA-BNCT, GB-10-BNCT, (GB-10+BPA)-BNCT or beam only treatments. Normal (non-cancerized) hamsters were treated similarly to evaluate normal tissue radiotoxicity. The total physical dose delivered to tumor with the BNCT treatments ranged from 6 to 8.5 Gy. Tumor control at 30 days ranged from 73% to 85%, with no normal tissue radiotoxicity. Significant but reversible mucositis in precancerous tissue surrounding tumors was associated to BPA-BNCT. The therapeutic success of different BNCT protocols in treating experimental oral cancer at this novel facility was unequivocally demonstrated.

  15. Geological and environmental observations in the Sunchales Creek and Tonco River , Don Otto uranium mine, Salta Province

    International Nuclear Information System (INIS)

    Gorustovich, S.; Guidi, F.; Bárbaro, N.; Nievas, H.; Tomellini, G.

    2013-01-01

    Results of geological and environmental observations made by professionals of the Comisión Nacional de Energía Atómica (CNEA) down streams Don Otto uranium mine on the Sunchales creek, from Los Guanacos strait down to the Tonco river mouth, and from river mouth down to narrow pass named Salto Grande, are presented in this report. La Yesera, Las Curtiembres and Los Blanquitos Formations of the Pirgua Subgroup, and Lecho and Yacoraite Formations of the Balbuena Subgroup crops out in that area (Salta Group, Cretaceous- Middle Eocene). Water stream analyses have given uranium contents between 890 μg/L and 1,100 μg/L, and uranium in stream sediments between 4 μg/g and 14 μg/g; radimetric anomalias up to 1,500 c/s in discoloured facies of the Las Curtiembres Formation, and 2,000 c/s in dark pelitic sediments of the Yacoraite Formation. A new zone with uranium traces in Curtiembres Formation belonging to the Pirgua Subgroup has been identified in the Alemanía cretaceous basin, which is stratigraphically similar to Cajoncillo, Las Abritas and El Fraile deposits. Those traces in addition to the other ones localized in the upper third of the Yacoraite Formation would have been originated by the geochemical uranium anomalies in waters and stream sediments by uranium leaching of rocks. The geochemical uranium anomalies in water and sediments are not a consequence of the antropic activity of the uranium mining carried out in Don Otto mine (1961-1982). (authors) [es

  16. Safety aspects of the RA-6 spent fuel shipment to the USA

    International Nuclear Information System (INIS)

    Novara, Oscar; Facchini, Guillermo; Fernandez, Carlos

    2008-01-01

    RA-6 reactor is located in Bariloche Atomic Centre (CAB), in the city of San Carlos de Bariloche, in the south of Argentina. In 2005, CNEA and DOE signed a contract for the conversion of the RA-6 reactor to LEU and for shipping back in a single shipment the HEU spent fuel inventory that consisted of 42 MTR - type fuel assemblies. The shipment activity was performed in the frame of the DOE's Spent Fuel Acceptance Program. The shipment campaign took place in the last quarter of 2007 and the receiving facility for the RA-6 fuel was Savannah River Site. One unit of a NAC - LWT shipping cask was used to ship the fuel. In order to place inside it all the fuel assemblies, cropping of their non active parts (structural parts) was required. In order to provide adequate shielding to the operators, fuel cropping was performed under water. Transfer of baskets loaded with conditioned fuel to the transport cask was made by shielded intermediate transfer systems. Especially designed shielded drums were manufactured for the storage of the cropped parts that remained in the reactor site as medium-level radioactive waste. After testing of the loaded LWT (radionuclide sampling test, helium test), the package check out was completed by measuring the superficial contamination (α and β/γ emitters) and the dose rate in contact and at 1 m. An additional requirement was to verify that the package was 'self-protected'. The ISO containers with the package and with the auxiliary equipment were also subjected to an equivalent radiological control. The typical daily staff that participated in the loading campaign was about twelve people. The collective dose was 0.72 mSv.man. (author)

  17. Fabrication and testing of U–7Mo monolithic plate fuel with Zircaloy cladding

    Energy Technology Data Exchange (ETDEWEB)

    Pasqualini, E.E. [Laboratorio de Nanotecnología Nuclear, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Av. General Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires (Argentina); Robinson, A.B. [Idaho National Laboratory, P. O. Box 1625, Idaho Falls, ID, 83415-6188 (United States); Porter, D.L., E-mail: Douglas.Porter@inl.gov [Idaho National Laboratory, P. O. Box 1625, Idaho Falls, ID, 83415-6188 (United States); Wachs, D.M. [Idaho National Laboratory, P. O. Box 1625, Idaho Falls, ID, 83415-6188 (United States); Finlay, M.R. [Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW, 2234 (Australia)

    2016-10-15

    Nuclear fuel designs are being developed to replace highly enriched fuel used in research and test reactors with fuels of low enrichment. In the most challenging cases, U–(7–10 wt%)Mo monolithic plate fuels are proposed. One of the considered designs includes aluminum-alloy cladding, which provides some challenges in fabrication and fuel/cladding interaction during service. Zircaloy cladding, specifically Zry–4, was investigated as an alternative cladding, and development of a fabrication method was performed by researchers with the Comisión Nacionalde Energia Atómica (CNEA) in Argentina, resulting in test fuel plates (Zry–4 clad U–7Mo) which were subsequently tested in the Advanced Test Reactor in Idaho. Because Zry–4 and U–(7–10)Mo have similar high-temperature mechanical properties, fabrication was simplified in that the fuel foil and cladding could be co-rolled and bonded. The challenge was to prevent a thermal-expansion mismatch, which could destroy the fuel/cladding bond before complete bonding was achieved; the solution was to prevent the composites from cooling significantly during or between roll passes. The final product performed very well in-reactor, showing good bonding, very little fuel/cladding interaction—either from fabrication or in-reactor testing—and little swelling, especially no detectable heterogeneous bubble formation at the fuel/cladding interface tested to a fission density of up to 2.7E+21 (average) fissions/cm{sup 3}, 3.8E+21 (peak).

  18. Changes induced by gamma radiation in microsomal membranes of storage of garlic; Cambios provocados por la radiacion gamma en membranas microsomales de hoja de reserva de ajo

    Energy Technology Data Exchange (ETDEWEB)

    Perez, M B; Croci, C A [Universidad Nacional del Sur, Bahia Blanca (Argentina). Laboratorio de Radioisotopos; Aveldano, M I [Universidad Nacional del Sur, Bahia Blanca (Argentina). Instituto de Investigaciones Bioquimicas

    2003-07-01

    This study evaluates the effects of the radio inhibition process on garlic bulbs in terms of phase properties of microsomal membranes and their lipid and fatty acid composition. Garlic bulbs were irradiated with an average dose of 60 Gy of {sup 60}Co gamma rays 30-40 days after harvest. The treatment was carried out in the facilities of the National Atomic Energy Commission (CNEA). Rough and smooth microsomal membranes were isolated by ultracentrifugation from tissues of irradiated and non-irradiated storage leaves. Wide angle X-ray diffractograms of both fractions were recorded along 270 days of storage. Lipids were separated by thin layer chromatography. The fatty acid composition of major lipid fractions was studied by gas-liquid chromatography. The diffractograms featured peaks at Bragg spacing of 4.15 Armstrong and 3.75 Armstrong, revealing the presence of a gel (crystalline) phase, while the characteristic peak of the liquid-crystalline phase (4.6 Armstrong) was not observed in both sorts of membranes. Irradiation was found to bring about modifications in the intensity of 4.15 Armstrong and 3.75 Armstrong peaks from smooth microsomal membranes, but not in the behaviour along the studied period. Data from the rough microsomal fraction were erratic. Parallel to these changes, radiation induced significant modifications in the level of smooth microsomal membrane triacylglycerols in relation to phospholipids and their fatty acids. These findings indicate that the storage leaf tissues of garlic are radiosensitive both in terms of physical and chemical properties of their microsomal membranes. From the practical point of view, these results could be the basis for the development of techniques to be applied to storage garlic to evaluate if it was irradiated. (author)

  19. PSA Level 2 as element of an integral safety assessment before plant commissioning

    International Nuclear Information System (INIS)

    Loeffler, H.; Mildenberger, O.; Sonnenkalb, M.; Steinroetter, T.

    2012-01-01

    In Argentina the Central Nuclear Atucha II is near to completion. This is a pressurized heavy water reactor. PSA (Probability Safety Assessment) level 1, level 2 and level 3 have to be performed in order to show compliance with the Argentinean dose limit. Such studies have been done first by the former KWU in the 1980's to get the construction license (FABIAN 1985). Nowadays the plant owner NA-SA performs PSA level 1 and provides information about the core damage states to GRS, who does the subsequent PSA level 2 part. GRS delivers source terms to the environment and the associated frequencies to the Argentinean research institute CNEA, which performs level 3 together with NA-SA. Since GRS is situated in the middle of the chain, interface definition with both ends has been a significant task of the GRS activities. Experience gained during this process will be highlighted in the presentation. The analysis of PSA level 2 proper follows a traditional approach: -) deterministic accident simulation with integral code MELCOR; -) analyses of specific issues which are not covered by MELCOR; and -) probabilistic accident progression analysis with EVNTRE event tree methodology. It appears that MELCOR and EVNTRE and PSA guidelines in general are flexible enough to analyse new or uncommon reactor designs. It also appears that the plant specific design features may require analyses beyond present code capabilities, calling for expert judgment and they can largely determine PSA results. The behaviour of iodine is not yet covered satisfactorily by state-of-the-art models in MELCOR

  20. The integral formation of the university technologists in nuclear medicine

    International Nuclear Information System (INIS)

    Tossi, Mirta H.; Chwojnik, Abraham; Otero, Dino

    2003-01-01

    Full text: Nuclear medicine has contributed to notable benefits to the human health from the very beginning. The Radioisotopes techniques, as well as the ionizing radiation used, have evolved providing functional and anatomical information of the patient, through non-invasive methods. With reference to Radiological Protection, the justification of each one of these practices and its perfect execution is intimately related to the benefit provided to the patients. The National Atomic Energy Commission apart from favouring the scientific and technological development, considers indispensable to work thoroughly on the professional training of the prospective technologists. Our over twenty-year experience in organizing and delivering courses of Technologists in Nuclear Medicine, although based on a much simpler program, have allowed the Institute of Nuclear Studies of the Ezeiza Atomic Center to acquire the capacity of developing a program to train highly qualified Technologists in that field. This project represents a step forward of great importance to the graduates qualification, since they will have the endorsement of CNEA and of the Faculty of Medicine of the Maimonides University. These are the three outstanding characteristics agreed on: 1.- General Education, carried out by subjects closely related to the optimisation of the relation Technologist - Patient - Environment and represented by: Radiological Protection and Hospital Security, Psychology, Ethics and Professional Medical Ethics, Nursing, English, Hygiene and Hospital Security and Management of the Quality in Services of Health. 2.- Diagnostic Procedures: planned according to organs, apparatuses or systems which are horizontally crossed by the anatomy, physiology and physiopathology Preparation of the patient, indications, main counter indications, radiopharmaceuticals, mechanisms of incorporation, pathologies, clinical protocols, instrumentation, post radiopharmaceuticals administration imaging

  1. Dosimetry and radiobiology at the new RA-3 reactor boron neutron capture therapy (BNCT) facility: Application to the treatment of experimental oral cancer

    International Nuclear Information System (INIS)

    Pozzi, E.; Nigg, D.W.; Miller, M.; Thorp, S.I.; Heber, E.M.; Zarza, L.; Estryk, G.; Monti Hughes, A.; Molinari, A.J.; Garabalino, M.; Itoiz, M.E.; Aromando, R.F.; Quintana, J.; Trivillin, V.A.; Schwint, A.E.

    2009-01-01

    The National Atomic Energy Commission of Argentina (CNEA) constructed a novel thermal neutron source for use in boron neutron capture therapy (BNCT) applications at the RA-3 research reactor facility located in Buenos Aires. The aim of the present study was to perform a dosimetric characterization of the facility and undertake radiobiological studies of BNCT in an experimental model of oral cancer in the hamster cheek pouch. The free-field thermal flux was 7.1x10 9 n cm -2 s -1 and the fast neutron flux was 2.5x10 6 n cm -2 s -1 , indicating a very well-thermalized neutron field with negligible fast neutron dose. For radiobiological studies it was necessary to shield the body of the hamster from the neutron flux while exposing the everted cheek pouch bearing the tumors. To that end we developed a lithium (enriched to 95% in 6 Li) carbonate enclosure. Groups of tumor-bearing hamsters were submitted to BPA-BNCT, GB-10-BNCT, (GB-10+BPA)-BNCT or beam only treatments. Normal (non-cancerized) hamsters were treated similarly to evaluate normal tissue radiotoxicity. The total physical dose delivered to tumor with the BNCT treatments ranged from 6 to 8.5 Gy. Tumor control at 30 days ranged from 73% to 85%, with no normal tissue radiotoxicity. Significant but reversible mucositis in precancerous tissue surrounding tumors was associated to BPA-BNCT. The therapeutic success of different BNCT protocols in treating experimental oral cancer at this novel facility was unequivocally demonstrated.

  2. Neutronic calculations for the reactor pressure vessel of Atucha I nuclear power plant

    International Nuclear Information System (INIS)

    Lerner, Ana M.; Madariaga, Marcelo R.

    1999-01-01

    In 1974 a surveillance program for the Atucha I nuclear power plant pressure vessel was initiated which included the construction of different types of specimens, distributed in 30 irradiation capsules located under the core at the lower part of some of the fuel channels. The capsules containing the irradiated specimens were withdrawn in two stages; the first set (SET 1) of 15 specimens in 1980 and the second one (SET 2) of the remaining 15, in 1987. Both fracture mechanic tests and dosimetry analysis were carried out by the designer (KWU) for SET1 and by the owner National Atomic Energy Commission (CNEA) for SET2. The calculations performed in the case of SET1 showed that there was a significant spectrum difference between the position where the specimens had been and the reactor pressure vessel (RPV) - inner surface (IS). It was established that the ratio of thermal flux (E 1 MeV) varied, approximately, from 1000 to 10 from the irradiation position to the RPV- IS. The purpose of this report is to show the calculations recently performed at the Nuclear Regulatory Authority, with particular emphasis on the difference in the results generated by the modification to sightly enriched fuel. A simplified 1-D calculations show that there is a slight increase (4% approximately) in the flux along the whole energy range. As it has already been mentioned, this is due, more than to the isotopic composition of the new fuel, to the difference in power density spatial distribution, which is a consequence of a different fuel management, necessary to preserve operational limits below their maximum allowed values with the same total thermal power generated. More detailed calculations are nevertheless foreseen in order to verify these first results. (author)

  3. Dosimetric studies of the lens of the eye using a new dosimeter - polls in two departments of Interventional Radiology of the autonomous city of Buenos Aires

    International Nuclear Information System (INIS)

    Pirchio, R.; Sánchez, H.; Domazet, W

    2013-01-01

    During interventional radiology (IR) and cardiology (IC) procedures, medical staff can receive high doses to their eye lenses. The Retrospective Evaluation of Lens Injuries and Dose (RELID) study organized in Argentina in 2010 found incipient opacity in 50% of IC physicians and 41% of IC technicians/nurses. These results, added to the recommendations of the International Commission on Radiological Protection (ICRP), which lowered their former occupational equivalent dose limit for the lens, led us to assess the eye lens dose, Hp(3), during interventional procedures. To this end, a new dosemeter was designed and calibrated at the National Atomic Energy Commission (CNEA) of Argentina to evaluate Hp(3). Personal dose equivalent (Hp(10)), and Hp(3) were assessed for 3 months in two IC and IR departments of Buenos Aires City using thermoluminescent dosimeters (TLD) and electronic personal dosimeter (EPD). An Rando Alderson phantom was used to simulate monthly exposures of five occupational staff members. Hp(3) and Hp(10) were obtained monthly for 14 occupational staff members exposed to 121 IR and IC procedures. We concluded that the annual effective dose and Hp(3) were lower than 0.3 and 10 mSv, respectively. An occupational annual dose constraint of 0.3 mSv was calculated. Average cumulative Hp(3) for working life of 40 years should be lower than 400 and 200 mSv for physicians and technicians/scrub nurse, respectively. Also we concluded that a calibrated EPD worn on a pocket in the lead apron and a TLD dosemeter worn on the collar thyroid (both at the maximal radiation side) could be used as guidance to the lens dose. Finally, To reduce doses of medical staff, actions should be promoted to maximize radiation protection in interventional procedures with appropriate training, using personal dosimetry and protection instruments as lead glasses, ceiling-suspended shields and others. (author)

  4. Argentine intercomparison programme for personal dosimetry

    International Nuclear Information System (INIS)

    Gregori, B.N.; Papadopulos, S.B.; Cruzate, J.; Kunst, J.J.; Saravi, M.

    2005-01-01

    Full text: In 1997 began in Argentine, sponsored by Nuclear Regulatory Authority (ARN) the intercomparison program for personal dosimetry laboratories, on a voluntary basis. Up to know 6 exercises have been done. The program began with a workshop to present the quantities, personal dose equivalent, Hp(10) and extremities dose equivalent, Hs(d). The first aim of this program was to know the true sate of personal dosimetry laboratories in the country, and then introduce the personal dose equivalent, Hp(10) into the dose measurements. The Regional Reference Center for Dosimetry (CCR), belonging to CNEA and the Physical Dosimetry Laboratory of ARN performed the irradiation. Those were done air free and on ICRU phantom, using x-ray, quality ISO: W60, W110 and W200; and 137 Cs and 60 Co gamma rays. The irradiation was made following ISO 4037 (2) recommendations. There are studied the dose, energy and angular response of the different measuring system. The range of the dose analyzed was from 0.2 mSv up to 80 mSv. The beam incidence was normal and also 20 o and 60 o . The dosimeters irradiation's were performed kerma in free in air and in phantom in order to study the availability of the service to evaluate the behavior as a function of kerma free in air or Hp(10). At the same time several items have been asked to each participant referring to the action range, the detectors characteristics, the laboratory procedures, the existence of an algorithm and its use for the dosimeter evaluation and the wish to participate in a quality assurance program. The program worked in writing a standard of personal dosimetry laboratories, that was published in 2001. In this work the results of each laboratory and its performance based on the ICRP-60 and ICRP-35 acceptance criteria are shown. Also the laboratory evolution and inquiry analyses have been included. (author)

  5. Hydraulic and hydrodynamic tests for design evaluation of research reactors fuel elements

    International Nuclear Information System (INIS)

    Kulichevsky, R.; Martin Ghiselli, A.; Fiori, J.; Yedros, P.

    2002-01-01

    During the design steps of research reactors fuel elements some tests are usually necessary to verify its design, i.e.: its hydraulic characteristics, dynamical response and structural integrity. The hydraulic tests are developed in order to know the pressure drops characteristics of different parts or elements of the prototype and of the whole fuel element. Also, some tests are carried out to obtain the velocity distribution of the coolant water across different prototype's sections. The hydrodynamic tests scopes are the assessment of the dynamical characteristics of the fuel elements and their components and its dynamical response considering the forces generated by the coolant flowing water at different flow rate conditions. Endurance tests are also necessary to qualify the structural design of the FE prototypes and their corresponding clamp tools, verifying the whole system structural integrity and wear processes influences. To carry out these tests a special test facility is needed to obtain a proper representation of the hydraulic and geometric boundary conditions of the fuel element. In some cases changes on the fuel element prototype or dummy are necessary to assure that the data results are representative of the case under study. Different kind of sensors are mounted on the test section and also on the fuel element itself when necessary. Some examples of the instrumentation used are strain gauges, displacement transducers, absolute and differential pressure transducers, pitot tubes, etc. The obtained data are, for example, plates' vibration amplitudes and frequencies, whole bundle displacement characterization, pressure drops and flow velocity measurements. The Experimental Low Pressure Loop is a hydraulic loop located at CNEA's Constituyentes Atomic Center and is the test facility where different kind of tests are performed in order to support and evaluate the design of research reactor fuel elements. A brief description of the facility, and examples of

  6. Evaluation of the quality of hot air dehydrated onion coming from gamma radiated bulbs

    International Nuclear Information System (INIS)

    Elman, L.; Pezzutti, A.; Croci, C.A.

    2003-01-01

    The purpose of this work was to evaluate the quality of hot air dehydrated onion, as regards physical and chemical characteristics, coming from the regional product that was gamma irradiated for sprout inhibition. We worked with the onion variety Valenciana Sintetica 14. Radio inhibition was made 30 days post harvest with gamma radiation from a 60 Co source at the Centro Atomico Ezeiza-CNEA, using a dose of 60 Gy. The skin of the bulbs was manually removed and the bulbs were cut in pieces 3 mm thick and between 1 and 3 cm long. The material was dehydrated in a rotating dryer with forced air circulation at 60 C degrees, between 0.8 and 1.7 m/s air speed and at ambient relative humidity. Dehydration was made 80 days after post-irradiation. The quality of the dehydrated onion was evaluated by the following physical- chemical analysis: total solids content, pungency (indirectly measured by pyruvic acid content assessment), color, pH, carbon hydrates and sensorial analysis. All analytical determinations were made in triplicate. The results obtained showed there are no significant changes between the averages of the physical-chemical properties of the control dehydrated samples and those coming from the radio-inhibited raw matter. According to the sensorial analysis, only the color of dehydrated onion was affected by the radio inhibition process. However, and according to the panel members comment, the greatest browning degree observed in ionizing radiation treated onion seemed to result more attractive to them. It may be concluded that radio inhibited regional onion can be useful as raw matter for hot air dehydrated product. It must be remarked that its use would extend the product use by dehydration plants, thus implying an increase of their processing capacity with the corresponding financial benefit. (author)

  7. RERTR activities in Argentina

    International Nuclear Information System (INIS)

    Adelfang, P.; Alvarez, L.; Pasqualini, E.

    2002-01-01

    The Atomic Energy Commission of Argentina has been an active participant of the RERTR program since 1978. An important milestone of the Argentinean RERTR program was the development and manufacturing at industrial scale of U 3 O 8 dispersed fuel and its subsequent application to the conversion of the RA-3 reactor core to LEU fuel. More recently, our activities were focused on the development of U 3 Si 2 fuel with a density of 4.8 gU/cm 3 and the improvement of the manufacturing process of this type of fuel. The program to qualify CNEA as a supplier U 3 Si 2 dispersed fuels is scheduled to finalize by mid 2003. To hasten this program the main research reactor of Argentina, the RA3, raised its power from 5 MW to 8 Mw in October this year. This is an intermediate step in the program to increase RA-3 power to 10 MW Currently, one of the main objectives is to develop and qualify the technology for the production of high-density LEU fuel elements using U-Mo alloy. An original way to produce U-Mo powder (the HMD process) was developed and its being upgraded to plant scale production. Another significant progress was the development of LEU targets for the production of 99 Mo, in the form of miniplates prepared with dispersed LEU U-Al x . The shipment to USA of 207 MTR spent fuels containing US origin highly enriched uranium, successfully carried out in the end of 2000, is another remarkable achievement of the Argentinean RERTR program. This activity was carried out in the framework of the United States Foreign Research Reactor Spent Nuclear Fuel Acceptance Program. The fuels were fabricated in Argentina and used in the RA-3 reactor from 1968 to 1987. The inventory of the shipped HEU spent fuel consisted in 166 standard assemblies and 41 control assemblies. (author)

  8. Analysis of a possible experimental assessment of a prototype fuel element containing burnable poison in the RA-3 reactor

    International Nuclear Information System (INIS)

    Lerner, Ana Maria; Madariaga, Marcelo

    2002-01-01

    The Argentine RA-3 research reactor (5 MW) is presently operated with LEU fuel by the National Atomic Energy Commission (CNEA). It belongs to the group of nuclear installations controlled, from the radiological and nuclear safety point of view, by the Nuclear Regulatory Authority (ARN). A new type of fuel elements containing burnable absorbers, with similar enrichment as the standard fuel elements but greater fissile contents, has recently been proposed for a new Argentine reactor design (RRR). In this framework the ARN considers interesting, if technically possible, the performance of an experiment in the RA-3 reactor. The experiment might enable, for such fuel element containing burnable poison, the verification of its neutronic behaviour under irradiation as well as a validation of the calculation line by comparison to measured values. It should be desirable that such experiment could reproduce as much as possible those conditions estimated for the RRR reactor, still under design in Argentina, having Silicide fuel elements with burnable poison, in the shape of cadmium wires in their structure. We here analyse a possible experiment consisting in the loading of a prototype fuel element with burnable poison in a normally loaded RA-3 core configuration. It would essentially be a standard RA-3 fuel element, having cadmium wires in its frame. This experiment would enable the verification of the prototype behaviour under irradiation, its operation limits and conditions, and particularly, the reactivity safety margins established in Argentine Standards, both calculated and measured. The main part of the experiment would imply some 200 full power days of operation at 5 MW, which would be drastically reduced if the reactor power is increased to 10 MW, as foreseen. We also show that under the proposed conditions, the experiment would not represent a significant penalty to the reactor normal operation. (author)

  9. A pilot programme for the detection of neonatal hypothyroidism in Argentina

    International Nuclear Information System (INIS)

    Barmasch, M.; Fontana, O.; Velazquez, B.; Straface, R.

    1986-01-01

    The CNEA (Argentine National Atomic Energy Commission) is engaged in a pilot programme with a view to adapting the procedures used in the developing countries, demonstrating the clinical value of mass-scale detection and transferring the methodology developed to medical care centres, where its application could be extended to cover the whole population. For this purpose, the authors selected six zones in Argentina with different geographical and epidemiological characteristics: (1) Greater Buenos Aires, with its stable local population, plus a contribution from the population migrating from within the country; (2) a maritime zone; (3) a north-eastern zone: midland and lowland; (4) a north-western zone; (5) a western zone; (6) a south-western zone; the three last provinces of the Cordillera are classed as endemic goitre zones. The method of detection selected was radioimmunoassay of human thyrotrophic hormone (TSH) in whole blood samples absorbed on paper, using commercial kits designed for neonatal measurement. Statistical studies were made to optimize the time of extraction of the blood sample with allowance for the fact that in the countryside discharge of the new-born child from the hospital frequently occurs within 24 hours. A major percentage of new-born children with suspicious TSH values due to perinatal pathology, through lack of pre-natal care, was observed in the population lacking resources and health insurance. In order to facilitate the follow-up of the hypothyroid children the measurement of thyroid hormones in serum using the RIA laboratories available in each of the regions was initiated. As a result, the pilot programme has brought to light 11 hypothyroids out of the 14,574 new-born babies studied; a very high incidence was observed in the endemic goitre zones

  10. Reduction of water consumption in the dynamic acid leaching process of uranium

    International Nuclear Information System (INIS)

    Chocron, M.; Arias, M.J.; Avato, A.M.; Díaz, V.A.

    2013-01-01

    In 2006 the Argentine state announced a plan to reactivate the nuclear sector. As a result of this decision, the National Atomic Energy Commission (CNEA) resumed its research in uranium mining for Argentine deposits. The first step was the study of the leaching process, mainly the dynamic leaching. In this work the influence of the reduction of the water content in the dynamic leaching process in acid medium, at laboratory scale and under batch operating conditions, on the main operating parameters (concentration of the leaching reagent, the oxidizing reagent and The reaction temperature). The percentages of pulp solids studied in the dynamic leaching were 53% and 66% w / w. For the tests uranium-molybdenum ores of the sandstone type were used. Two different working schemes were used to study the different operating parameters. In the tests carried out with 53% of solid in pulp, the parameters were studied individually (varying one parameter at a time), while working with a pulp of 66% solids, the study of the parameters was performed by a Factorial design of two levels of three variables, which in addition to studying the dependence of the different parameters allowed to analyze how they influence each other. During the leaching tests with 66% solids content in pulp, changes in the geometric and dynamic conditions of the system were necessary because of the poor mixing observed when using the same agitation conditions used in the leaching tests with 53% solids in pulp. When comparing the tests for both solids content conditions (53% and 66% w / w), similar extraction yields were observed for both uranium and molybdenum (more than 90% for uranium and more than 80% for The molybdenum). As a final result, the process water consumption (380 liters of water per ton of ore) is reduced by more than 50% by working with pulps of 66% w / w of solids, obtaining acceptable extraction yields and, as an additional, reducing The consumption of the leaching reagent. (author)

  11. Assessment of theoretical and experimental results in the calculation of atmospheric dilution factors in the Atucha I nuclear power plant

    International Nuclear Information System (INIS)

    Quintana, E.E.; Tossi, M.H.; Telleria, D.M.

    1990-01-01

    Collective doses produced during the normal working of the Atucha I Nuclear Power Plant are calculated using annual atmospheric factors. This work studies the behaviour of the dilution factors in different periods of the year in order to fit the calculated dose model applying factors from seasonal, monthly or weekly periods. The Radiation Protection Group of the C.N.E.A. have carried out continuous environmental monitoring in the surroundings of the Atucha I Nuclear Power Plant. These studies include the measurement of air tritium concentration, radionuclide that is found principally as tritiated water vapour. This isotope, normally released by the nuclear power plant was used as a tracer to assess the atmospheric dilution factors. Factors were calculated by two methods: an experimental one, based on environmental measurements of the tritium concentration in the surroundings of the nuclear power plant and another one by applying a theoretical model based on information from the micrometeorological tower located in the mentioned place. To carry out the environmental monitoring, four monitoring stations in the surroundings of the power plant were chosen. Three of them are approximately one kilometer from the plant and the fourth is 7.5 km away, near the city of Lima. To condense and collect the atmospheric water vapour, an overcooling system was used. The measurement was performed by liquid scintillation counting, previous alkaline electrolytical enrichment of the samples. The theoretical model uses hourly values of direction and wind intensity, as well as the atmospheric dispersive properties. Values obtained during the period 1976 to 1988 allowed, applying statistical tests, to validate the theoretical model and to observe seasonal variation of the dilution factors throughout the same year and between different years. Finally, results and graphics are presented showing that the behaviour of the dilution factors in different periods of the year. It is recommended to

  12. Changes induced by gamma radiation in microsomal membranes of storage of garlic

    International Nuclear Information System (INIS)

    Perez, M.B.; Croci, C.A.; Aveldano, M.I.

    2003-01-01

    This study evaluates the effects of the radio inhibition process on garlic bulbs in terms of phase properties of microsomal membranes and their lipid and fatty acid composition. Garlic bulbs were irradiated with an average dose of 60 Gy of 60 Co gamma rays 30-40 days after harvest. The treatment was carried out in the facilities of the National Atomic Energy Commission (CNEA). Rough and smooth microsomal membranes were isolated by ultracentrifugation from tissues of irradiated and non-irradiated storage leaves. Wide angle X-ray diffractograms of both fractions were recorded along 270 days of storage. Lipids were separated by thin layer chromatography. The fatty acid composition of major lipid fractions was studied by gas-liquid chromatography. The diffractograms featured peaks at Bragg spacing of 4.15 Armstrong and 3.75 Armstrong, revealing the presence of a gel (crystalline) phase, while the characteristic peak of the liquid-crystalline phase (4.6 Armstrong) was not observed in both sorts of membranes. Irradiation was found to bring about modifications in the intensity of 4.15 Armstrong and 3.75 Armstrong peaks from smooth microsomal membranes, but not in the behaviour along the studied period. Data from the rough microsomal fraction were erratic. Parallel to these changes, radiation induced significant modifications in the level of smooth microsomal membrane triacylglycerols in relation to phospholipids and their fatty acids. These findings indicate that the storage leaf tissues of garlic are radiosensitive both in terms of physical and chemical properties of their microsomal membranes. From the practical point of view, these results could be the basis for the development of techniques to be applied to storage garlic to evaluate if it was irradiated. (author)

  13. Knowledge preservation of Atucha type reactor: Practical approaches and lessons learned

    International Nuclear Information System (INIS)

    Eppenstein, M.; Vetere, C.

    2004-01-01

    As Siemens, designer of the Atucha type HWRs, has transferred its nuclear activities to Framatome ANP, Argentina must undertake the knowledge preservation of this type of reactor, both if life extension is decided for the operating Atucha I NPP, and/or if ending the construction of Atucha II is decided. Another reason for undertaking a knowledge preservation program is aging and increasing retirement of personnel in the nuclear field, and the small number of young people in nuclear related disciplines at the universities. This situation motivated CNEA to implement a Knowledge Management system (KM), in order to capture and capitalize the tacit and explicit knowledge, to spread it and share it, making use of the technical and suitable tools through the organization. The strategy was based on recognizing the critical knowledge by means of a methodology incorporating the critical knowledge map technique. This map is a tool that uses the cognitive surfing in order to access to the organization heritage knowledge. Different techniques and methodologies are applied for identifying the critical knowledge domains. The result is a vigorous graphical tool with a certain formalism, able to describe knowledge in a hierarchical way in order to preserve it. It is used to analyze the criticality, and as an access portal to the knowledge patrimony, pointing out, according to each knowledge area, the people skills, publications, related documents and others. Experience obtained through the KM system development shows how training techniques are put into practice, in order not to interfere with normal plant operation, and how to initiate the KM processes in order to improve the criticity. (author)

  14. Savannah River Site waste vitrification projects initiated throughout the United States: Disposal and recycle options

    International Nuclear Information System (INIS)

    Jantzen, C.M.

    2000-01-01

    A vitrification process was developed and successfully implemented by the US Department of Energy's (DOE) Savannah River Site (SRS) and at the West Valley Nuclear Services (WVNS) to convert high-level liquid nuclear wastes (HLLW) to a solid borosilicate glass for safe long term geologic disposal. Over the last decade, SRS has successfully completed two additional vitrification projects to safely dispose of mixed low level wastes (MLLW) (radioactive and hazardous) at the SRS and at the Oak Ridge Reservation (ORR). The SRS, in conjunction with other laboratories, has also demonstrated that vitrification can be used to dispose of a wide variety of MLLW and low-level wastes (LLW) at the SRS, at ORR, at the Los Alamos National Laboratory (LANL), at Rocky Flats (RF), at the Fernald Environmental Management Project (FEMP), and at the Hanford Waste Vitrification Project (HWVP). The SRS, in conjunction with the Electric Power Research Institute and the National Atomic Energy Commission of Argentina (CNEA), have demonstrated that vitrification can also be used to safely dispose of ion-exchange (IEX) resins and sludges from commercial nuclear reactors. In addition, the SRS has successfully demonstrated that numerous wastes declared hazardous by the US Environmental Protection Agency (EPA) can be vitrified, e.g. mining industry wastes, contaminated harbor sludges, asbestos containing material (ACM), Pb-paint on army tanks and bridges. Once these EPA hazardous wastes are vitrified, the waste glass is rendered non-hazardous allowing these materials to be recycled as glassphalt (glass impregnated asphalt for roads and runways), roofing shingles, glasscrete (glass used as aggregate in concrete), or other uses. Glass is also being used as a medium to transport SRS americium (Am) and curium (Cm) to the Oak Ridge Reservation (ORR) for recycle in the ORR medical source program and use in smoke detectors at an estimated value of $1.5 billion to the general public

  15. Sustainability of new uranium mining projects in Argentina

    International Nuclear Information System (INIS)

    Navarra, P.R.

    2002-01-01

    The regulatory framework issued in the 1994-1995 period, connected mining activities in Argentina with international good environmental practices. Agreements between National Government and Provinces allow the application of the regulations, while Act No 24.585, the milestone about the matter, establishes the steps for the approval of the Report of Environmental Impact, on successive stages of the project. Specifically for uranium mining and milling, the assessment of the radiological protection aspects of the planned activities is assigned to the Nuclear Regulatory Authority. The National Atomic Energy Commission is at present carrying out two uranium mining projects, that involve the Sierra Pintada and Cerro Solo deposits. The goal of them is restart uranium production in the country in the medium term, by lowing the gap between indigenous and market uranium prices. The first one consists in updating the feasibility study of the, at present inactive, Sierra Pintada Production Center (Mendoza Province). Studies for improving the mining and treatment methods are performed in the project, co-ordinately with the investigation and forecast of mining waste and processing tailings management. Besides, the procedures will be determined taking into account the methodology to be applied when getting the closure stage, about the existing waste and tailings. Development of the Sierra de Pichinan District, Chubut Province (U-Mo), is the objective of the second project. It is remarkable that about Cerro Solo, the main ore deposit belonging to this area, at the prefeasibility stage, CNEA is currently encouraging private investment through a bidding process. Environmental studies are an important aspect of the activities carried out and planned in the area. As a conclusion, with regard uranium mining and milling activities in Argentina, the regulations and environmental technical-scientific knowledge are becoming friendly with the sustainable practice. (author)

  16. Temperature dependence of trapping effects in metal gates/Al2O3/InGaAs stacks

    Science.gov (United States)

    Palumbo, F.; Pazos, S.; Aguirre, F.; Winter, R.; Krylov, I.; Eizenberg, M.

    2017-06-01

    The influence of the temperature on Metal Gate/Al2O3/n-InGaAs stacks has been studied by means of capacitance-voltage (C-V) hysteresis and flat band voltage as function of both negative and positive stress fields. It was found that the de-trapping effect decreases at low-temperature, indicating that the de-trapping of trapped electrons from oxide traps may be performed via Al2O3/InGaAs interface defects. The dependence of the C-V hysteresis on the stress field at different temperatures in our InGaAs stacks can be explained in terms of the defect spatial distribution. An oxide defect distribution can be found very close to the metal gate/Al2O3 interface. On the other side, the Al2O3/InGaAs interface presents defects distributed from the interface into the bulk of the oxide, showing the influence of InGaAs on Al2O3 in terms of the spatial defect distribution. At the present, he is a research staff of the National Council of Science and Technology (CONICET), working in the National Commission of Atomic Energy (CNEA) in Buenos Aires, Argentina, well embedded within international research collaboration. Since 2008, he is Professor at the National Technological University (UTN) in Buenos Aires, Argentina. Dr. Palumbo has received research fellowships from: Marie Curie Fellowship within the 7th European Community Framework Programme, Abdus Salam International Centre for Theoretical Physics (ICTP) Italy, National Council of Science and Technology (CONICET) Argentina, and Consiglio Nazionale delle Ricerche (CNR) Italy. He is also a frequent scientific visitor of academic institutions as IMM-CNR-Italy, Minatec Grenoble-France, the Autonomous University of Barcelona-Spain, and the Israel Institute of Technology-Technion. He has authored and co-authored more than 50 papers in international conferences and journals.

  17. Corrosion of steel drums containing immobilized ion exchange-resins and incineration ashes

    International Nuclear Information System (INIS)

    Marotta, F.; Schulz Rodriguez, F.M.; Farina, Silvia B.; Duffo, Gustavo S.

    2009-01-01

    The Argentine Atomic Energy Commission (CNEA) is responsible for developing the management nuclear waste disposal programme. This programme contemplates the design and construction of a facility for the final disposal of intermediate-level radioactive wastes. The proposed model is a near-surface monolithic repository similar to those in operation in El Cabril, Spain. The design of this type of repository is based on the use of multiple, independent and redundant barriers. The intermediate radioactive waste consists mostly in spent ionic exchange resins and filters from the nuclear power plants, research reactors and radioisotopes production facilities. The spent resins, as well as the incineration ashes, have to be immobilized before being stored to improve leach resistance of waste matrix and to maintain mechanical stability for safety requirements. Generally, cementation processes have been used as immobilization techniques for economical reasons as well as for being a simple operation. The immobilized resins and incineration ashes are thus contained in steel drums that, in turn, can undergo corrosion depending on the ionic content of the matrix. This work is a part of a systematic study of the corrosion susceptibility of steel drums in contact with immobilized cemented exchange-resins with different types and contents of aggressive species and incineration ashes. To this purpose, a special type of specimen was manufactured to simulate the cemented waste in the drum. The evolution of the corrosion potential and the corrosion current density of the steel, as well as the electrical resistivity of the matrix are being monitored along time. The aggressive species studied were chloride ions (the main ionic species present in nature) and sulphate ions (produced during the radiolysis process of the cationic exchange-resins after cementation). Preliminary results show the strong effect of chloride on the corrosion susceptibility of the steel. Monitoring will continue for

  18. Reinforced concrete in the intermediable-level nuclear waste repository

    International Nuclear Information System (INIS)

    Duffo, Gustavo

    2009-01-01

    The National Atomic Energy Commission (CNEA) is responsible for developing the nuclear waste disposal management programme. This programme contemplates the design and construction of a facility for the final disposal of intermediate-level radioactive wastes. The proposed model is a near-surface monolithic repository similar to those in operation in El Cabril, Spain. The design of this type of repository is based on the use of multiple, independent and redundant barriers and the model foresees a period of 300 years of institutional post-closure control. Since the vault and cover are major components of the engineered barriers, the durability of these concrete structures is an important aspect for the facility integrity. This work presents laboratory investigations performed on the corrosion susceptibility of steel rebars embedded in two different types of high performance reinforced concretes, recently developed by the National Institute of Industrial Technology (Argentine). Concretes were made with cement with Blast Furnace Slag (CAH) and Silica Fume cement (CAH + SF). The aim of this work is to predict the service life of the intermediate level radioactive waste disposal vaults from data obtained from electrochemical techniques. Besides, the diffusion coefficients of aggressive species, such as chloride and carbon dioxide, were also determined. On the other hand, data obtained with corrosion sensors embedded in a vault prototype is also included. These sensors allow on-line measurements of several parameters related to the corrosion process such as rebar corrosion potential and corrosion current density; incoming oxygen flow that reaches the metal surface; concrete electrical resistivity; chloride concentration and internal concrete temperature. All the information obtained from both, laboratory tests and sensors will be used for the final design of the container in order to achieve a service life more or equal than the foreseen durability for this type of

  19. Evaluation of the quality of hot air dehydrated onion coming from gamma radiated bulbs; Evaluacion de la calidad de cebolla deshidratada por aire caliente proveniente de bulbos tratados con radiacion gamma

    Energy Technology Data Exchange (ETDEWEB)

    Elman, L; Pezzutti, A; Croci, C A [Universidad Nacional del Sur, Bahia Blanca (Argentina). Laboratorio de Radioisotopos

    2003-07-01

    The purpose of this work was to evaluate the quality of hot air dehydrated onion, as regards physical and chemical characteristics, coming from the regional product that was gamma irradiated for sprout inhibition. We worked with the onion variety Valenciana Sintetica 14. Radio inhibition was made 30 days post harvest with gamma radiation from a {sup 60}Co source at the Centro Atomico Ezeiza-CNEA, using a dose of 60 Gy. The skin of the bulbs was manually removed and the bulbs were cut in pieces 3 mm thick and between 1 and 3 cm long. The material was dehydrated in a rotating dryer with forced air circulation at 60 C degrees, between 0.8 and 1.7 m/s air speed and at ambient relative humidity. Dehydration was made 80 days after post-irradiation. The quality of the dehydrated onion was evaluated by the following physical- chemical analysis: total solids content, pungency (indirectly measured by pyruvic acid content assessment), color, pH, carbon hydrates and sensorial analysis. All analytical determinations were made in triplicate. The results obtained showed there are no significant changes between the averages of the physical-chemical properties of the control dehydrated samples and those coming from the radio-inhibited raw matter. According to the sensorial analysis, only the color of dehydrated onion was affected by the radio inhibition process. However, and according to the panel members comment, the greatest browning degree observed in ionizing radiation treated onion seemed to result more attractive to them. It may be concluded that radio inhibited regional onion can be useful as raw matter for hot air dehydrated product. It must be remarked that its use would extend the product use by dehydration plants, thus implying an increase of their processing capacity with the corresponding financial benefit. (author)

  20. The national law on nuclear activity: some consequences

    International Nuclear Information System (INIS)

    Gonzalez Acosta, G.

    1997-01-01

    This article describes the contents of the new National Law on Nuclear Activities of the Argentine Republic, analysing the functions of the National Atomic Energy Commission (CNEA), the Nuclear Regulatory Authority (ARN) (former National Board of Nuclear Regulation -ENREN) and the privatisation of the nuclear power generation performed by the enterprise Nucleoelectrica Argentina S.A. (NASA). It also includes some comments about political and legislative records of the Law in the framework of the Nation's reorganization undertaken by the National Government for the privatisation of the rendering of public services, such as the production of energy and related activities. The Law was approved by Law 24.804 of April 2, 1997, and published in the Official Bulletin of the Argentine Republic on April 25, 1997. In accordance with the provisions of this Law, the National Government, through the above mentioned organisations, will fix the nuclear policy and the functions of research, development, surveillance and control of the nuclear activity. Also, as part of the execution of the nuclear policy, all the obligations accepted by Argentina as signatory party to the Treaty for the Prohibition of Nuclear Weapons in Latin America and the Caribbean (Tlatelolco Treaty), the Treaty on Non-Proliferation of Nuclear Weapons (TNP), the Agreement between the Argentine Republic and the Federative Republic of Brazil through the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) and the International Atomic Energy Agency (IAEA) to enforce Safeguards, in addition to the commitments signed by Argentina as a member of the Suppliers Group and the National Control System for Sensitive Exports, shall be met [es

  1. Stress corrosion cracking of zirconium and its alloys in halogenide solutions

    International Nuclear Information System (INIS)

    Farina, Silvia B.

    2001-01-01

    A doctoral thesis developed at the corrosion labs in CNEA a few years ago showed that zirconium and Zircaloy-4 were susceptible to stress corrosion cracking (SCC) in chloride aqueous solutions at potentials above the pitting potential. However, the nature of the phenomenon was not elucidated. On the other hand, references about the subject were scarce and contradictory. The development of new SCC models, in particular, the surface mobility SCC mechanism suggested a review of zirconium and Zircaloy-4 SCC in halogenide aqueous solutions. This mechanism predicts that zirconium should be susceptible to SCC not only in chloride solutions but also in bromide and iodide solutions due to the low melting point of the surface compounds formed by the interaction between the metal and the environment. The present work was aimed to determine the conditions under which SCC takes place and the mechanism operating during this process. For that purpose, the effect of electrochemical potential, strain rate and temperature on the SCC susceptibility of both, zirconium and Zircaloy-4 in chloride, bromide and iodide solutions was investigated. It was observed that those materials undergo stress corrosion cracking only at potentials higher than the breakdown potential. The crack velocity increased slightly with the applied potential, and the strain rate had an accelerating effect on the crack propagation rate. In both materials two steps were found during cracking. The first one was characterized as intergranular attack assisted by stress due to an anodic dissolution process. This step is followed by a transition to a transgranular mode of propagation, which was considered as the 'true' stress corrosion cracking step. The intergranular attack is the rate-determining step due to the fact that the transgranular propagation rate is higher than the intergranular propagation rate. Several stress corrosion cracking mechanisms were analyzed to explain the transgranular cracking. The predictions

  2. Upgrade for detection system of JARREL ASH 70-000 atomic emission spectrography with source of arc - spark

    International Nuclear Information System (INIS)

    Santa Cruz D E; Grau F N; Bellavigna H J; Garavaglia R N; Fernandez R O; Servant R

    2012-01-01

    Methodologies used in spectrochemical analysis have showed breakthroughs in last decades due to the newest digital technologies. The simultaneous determination of multiple elements in a short time has been allowed by the development of solid state multichannel detectors. Since its beginning CNEA has developed several spectroscopic methodologies that have been applied to the area of fuels and specific materials of the nuclear activity. The Analytical Chemistry Department has an atomic emission spectrograph with a source of arc/spark whose focal length is 3.4 meters and a spectral dispersion from 2.5 to 5 A/mm. This equipment was originally equipped with photographic detection. This feature although allowed the simultaneous detection of multiple elements, their response (photographic plate) has been not linear and their data's treatment has been very complex. Two alternatives of digital detection have been examined: CCD2 and CMOS3 according to the progress achieved in the instrumentation that is applied to similar techniques. After exhaustive evaluation an arrangement of 9 linear CCD detectors located in the focal plane originally occupied by 2 x10 inch photographic plates was chosen. The software provided by the manufacturer has been insufficient for cover our analytical necessities due to the requirements of our instrumental application. This led to develop an own program for our applications. Today, our detection system includes an assembly of 7 detectors and an acquisition program with basic control that has been developed in-house. Calibration curves for some chemical elements have shown very promising results, the sensitivity has increased at least 10 times and an important improvement of accuracy of the measurements has also been achieved thanks to our modification. An upgrade with an associated database that will allow obtaining spectra in 3D configuration and extend the instrumental capabilities to second order is being prepared (author)

  3. Characterization of fuel miniplates fabricated with U(Mo) particles dispersed in Al-Si matrices

    International Nuclear Information System (INIS)

    Arico, S F; Mirandou, M I; Balart, S N; Fabro, J O

    2012-01-01

    In 2011 ECRI facility (Depto. ECRI, GCCN, CNEA) restarted the development for the fabrication of dispersion miniplates fuel elements in Al-Si matrix. This miniplates are fabricated with atomized U-7wt%Mo particles dispersed in a matrix formed by a mixture of pure Al and pure Si powders. The first results for an Al-4wt%Si matrix were presented at the AATN 2011 Annual Meeting. In this work, new results from the microstructural characterization of the meat in Al- 2wt%Si and pure Al miniplates are presented and compared with the previous ones. It is the intention to study the influence of the fabrication parameters as well as different Si concentration in the matrix, on the formation and characteristics of the interaction layer formed between the particles and the matrix at the end of the fabrication process. According to the results presented in this work an improvement can be observed on miniplates with Al-Si matrix respect to the one with pure Al. On the miniplates with Al- Si matrix, almost 100 % of the U(Mo) particles presented, at least in some fraction of its surface, an interaction layer composed by phases that contain Si. Moreover its morphological characteristics are independent of the crystallographic state of the U(Mo) particles. However, the oxide layer formed on the U(Mo) during the hot rolling acts as a barrier to the formation of the interaction layer. As a consequence, it is then mandatory to introduce some changes on the fabrication parameters to avoid, or at least minimize, this oxide layer (author)

  4. Illicit trafficking of nuclear and other radioactive material in Paraguay

    Energy Technology Data Exchange (ETDEWEB)

    Facetti, J.F. [Institute of Strategic Studies, Asuncion (Paraguay)], E-mail: jfacetti@yahoo.com

    2009-07-01

    ratifying the inexistence of terrorist groups operating in these areas, but confirming the existence of strong evidence of the remittance of foreign currency to extremist Arab groups. Illegal activities in this area are notorious: weapons trafficking, money laundering, drug trafficking, and other types of traffic (nuclear and radioactive materials) cannot be dismissed. The problem is that authorities from no country would wish to have nuclear or radiological materials stolen or misplaced in them and then used to fabricate a 'dirty' bomb to perpetrate attacks. This document analyzes the situation of sector policies (international binding and non-binding agreements legal instruments, internal security policies, defence programs and plans, etc.); global and national threats; the nature of actions taken by the Paraguayan Government through effective mechanisms for coordination including planning, implementation and monitoring, and relevant collaborative actions implemented with the International Atomic Energy Agency - IAEA. (author)

  5. Illicit trafficking of nuclear and other radioactive material in Paraguay

    International Nuclear Information System (INIS)

    Facetti, J.F.

    2009-01-01

    ratifying the inexistence of terrorist groups operating in these areas, but confirming the existence of strong evidence of the remittance of foreign currency to extremist Arab groups. Illegal activities in this area are notorious: weapons trafficking, money laundering, drug trafficking, and other types of traffic (nuclear and radioactive materials) cannot be dismissed. The problem is that authorities from no country would wish to have nuclear or radiological materials stolen or misplaced in them and then used to fabricate a 'dirty' bomb to perpetrate attacks. This document analyzes the situation of sector policies (international binding and non-binding agreements legal instruments, internal security policies, defence programs and plans, etc.); global and national threats; the nature of actions taken by the Paraguayan Government through effective mechanisms for coordination including planning, implementation and monitoring, and relevant collaborative actions implemented with the International Atomic Energy Agency - IAEA. (author)

  6. Intenciones reproductivas y factores asociados con los nacimientos no planeados, Paraguay, 1995-2008 Reproductive intentions and factors related to unplanned births, Paraguay, 1995-2008

    Directory of Open Access Journals (Sweden)

    María Mercedes Melian

    2013-04-01

    Full Text Available OBJETIVO: Describir las intenciones reproductivas de las mujeres paraguayas entre 1995 y 2008 y determinar las características asociadas con los embarazos no deseados e inoportunos. MÉTODOS:. Estudio descriptivo exploratorio basado en datos secundarios de las encuestas nacionales de demografía y salud reproductiva de 1995, 2004 y 2008. Se analizaron los cambios en las características sociodemográficas de las mujeres, el uso de métodos anticonceptivos y la fecundidad, así como de la proporción de nacimientos deseados, inoportunos y no deseados. Mediante dos modelos de regresión logística multifactorial se determinaron las características asociadas con los embarazos no deseados o inoportunos. RESULTADOS: En 2008, la tercera parte (33,3% de los nacimientos no fueron planeados (25,6% inoportunos y 7,7% no deseados. La edad estuvo asociada de forma directa y significativa al deseo de postergar el último nacimiento; el nivel de escolaridad se asoció inversamente con la posibilidad de tener nacimientos inoportunos; y residir en áreas urbanas, con los nacimientos no deseados. El no estar casada o unida a una pareja estable estuvo asociado con considerar el último nacimiento como no deseado o inoportuno, tanto en las mujeres solteras como en las separadas, divorciadas o viudas. CONCLUSIONES: A pesar del mejoramiento del nivel de escolaridad de las mujeres, su mayor incorporación al trabajo remunerado, el aumento del uso de métodos anticonceptivos y la disminución de la fecundidad, todavía existen grupos de mujeres que no pueden satisfacer sus ideales reproductivos y están expuestas a embarazos no deseados o inoportunos.OBJECTIVE: To describe the reproductive intentions of Paraguayan women over the period from 1995 to 2008 and determine the characteristics associated with unwanted and mistimed pregnancies. METHODS: An exploratory, descriptive study was conducted using secondary data from national demographic and reproductive health

  7. Homicídios juvenis e informalidade em um município brasileiro da tríplice fronteira Brasil, Paraguai e Argentina Juvenile homicides and informal work in a Brazilian city in the Brazil, Paraguay, and Argentina tri-border area

    Directory of Open Access Journals (Sweden)

    Luciano de Andrade

    2012-05-01

    performed using ArcGIS® 9.2 and GeoDaTM software. RESULTS: A negative spatial autocorrelation was observed (I = -0.3563; P = 0.0250, indicating high, but dissimilar, homicide rates in all AEDs. Of 14 socioeconomic indicators analyzed, a negative (I = -0.2574; P = 0.0360 and positive (I = 0.2574; P = 0.0310 spatial autocorrelation was recorded for informal and formal work, respectively, indicating that the higher the number of informal jobs in a specific AED, the lower the homicide rate in neighboring AEDs. We identified a high rate of juvenile homicides, informal jobs, and importation of juvenile homicide victims from other AEDs into AED 6, located near the Paraguayan border. CONCLUSIONS: The high rate of juvenile homicides in some areas of Foz do Iguaçu is influenced by the high rate of informal occupations. This points to a serious social problem; namely, unemployment associated with lack of professional training.

  8. X-ray fluorescence in Member States: Cuba. Activities in Centre for Technological Applications and Nuclear Development (CEADEN)[X-ray Fluorescence in the IAEA and its Member States

    Energy Technology Data Exchange (ETDEWEB)

    Padilla-Alvarez, Roman [Centre for Technological Applications and Nuclear Development, CEADEN, Havana (Cuba)

    2007-08-15

    the detection limits. The development of a compact design holder for secondary target excitation (X-PRISM) and its combination with a digital signal processing spectrometer (DSP) allowed achieving a significant improvement in the instrumental sensitivity. This configuration has been successfully implemented in three laboratories of the IAEA Member States: CNEA Paraguay, OBIMAR (Puerto Quetzal, Guatemala) and CEAC (Cienfuegos, Cuba) in frame of various IAEA technical co-operation projects.

  9. Assembly of a laboratory for calibration in brachytherapy. Comparison of responses with different instrumentation

    International Nuclear Information System (INIS)

    Pirchio, R.; Saravi, M.

    2006-01-01

    A common practice in quality control programs for dosimetry in brachytherapy is the source calibration. The AAPM (American Association of Physicists in Medicine) in the Task Group No. 40 (TG-40) it recommends that each institution that offers a brachytherapy service verifies the intensity of each source provided by the maker with secondary traceability. For such a reason it is necessary to have laboratories able to make calibrations of sources, traceable electrometer-chambers to primary or credited laboratories. The Regional Center of Reference of Dosimetry of the CNEA (National Commission of Atomic Energy) it is in the stage of finalization of the assembly of a Laboratory for source calibration and use equipment in brachytherapy. For it has two ionization chambers well type and two electrometers gauged by the Accredited Dosimetry Calibration Laboratory of the University of Wisconsin. Also account with a wide variety of supports and with a tube of 137 Cs pattern 3M model 6500/6D6C. The procedures for the calibration of sources and equipment were elaborated starting from the TECDOC-1274. On the other hand, its were carried out measurements with different instrumentation for the comparison of responses and at the same time to implement the calibration procedures. For it, its were used chambers and electrometers of the institution, of hospitals and of the national company 'Solydes'. In the measurements its were used seeds of 125 I taken place in Argentina and the tube of 137 Cs pattern mentioned previously. In first place it was proceeded to the determination of the center of the region of the plateau in the axial response for the seeds of Iodine-125 and the tube of Cesium-137 pattern using different chambers. Later on its were carried out measurements of accumulated loads during a certain interval of time in this position. The calibration factors of each chamber were determined, N Sk (μGy m 2 h -1 A -1 ), as the quotient of the kerma rate in reference air of the

  10. Atucha I nuclear power plant: repair works in QK02W01 moderator system heat exchanger; Central nuclar Atucha I. Intervencion al intercambiador nro2 del moderador

    Energy Technology Data Exchange (ETDEWEB)

    Olivieri, Luis E; Zanni, Pablo A [Nucleoelectrica Argentina SA (NASA), Lima (Argentina). Central Nuclear Atucha 1

    2000-07-01

    reduction (46 tubes). The exchanger has 1049 tubes. Personnel involved in the repair works came from different areas: Atucha I/II nuclear power plants, SPC Department, Embalse nuclear power plant, NASA Headquarters, CNEA and INVAP specialists. (author)

  11. Development and validation of an improved version of the DART code

    International Nuclear Information System (INIS)

    Taboada, H; Moscarda, M.V.; Markiewicz, M.; Estevez, E.; Rest, J.

    2002-01-01

    ANL/USDOE and CNEA Argentina have been participating within a SisterLab Program in the area of Low Enriched Uranium Advanced Fuels since October 16, 1997 under the 'Implementation Arrangement for Technical Exchange and Cooperation in the Area of Peaceful Uses of Nuclear Energy'. An annex concerning DART code optimization has been operative since February 8, 1999. Previously, as a part of this annex we developed a visual version of DART named FASTDART for silicide and U-Mo fuels that was presented at the RERTR Meeting in Las Vegas, Nevada. This paper describes several major improvements in the FASTDART code: a thermal calculation subroutine, a fuel particle size distribution subroutine and several visual interfaces for thermal output plotting and particle size input. Using the power history, coolant regime data and fuel dimensions, the new thermal subroutine is able to calculate at each time step the maximum temperature along the z-longitudinal axis as a function of plate/rod morphology (corrosion oxide, cladding, meat, aluminide particle layer, each radial shell of a central fuel particle, and particle center). Calculated temperatures at each time step are coupled to the DART calculation kernel such that swelling processes, volume phase fractions and meat thermal conductivity are calculated synergistically. The new fuel particle size-distribution subroutine is essential in order to determine the evolution of the volume fraction of reaction product. This phase degrades the heat transport by a twofold mechanism: its appearance implies a diminution of aluminium phase and its thermal conductivity is lower than those of fuel and dispersant phase. The new version includes the capability of plotting thermal data output by means of the plate/rod temperature profile at a given irradiation step, and displaying the maximum temperature evolution of each layer. A comparison between the reaction layer thickness and matrix and fuel volume fractions of several RERTR-3 experiment

  12. Behaviour Test with the Leaching of a Waste package

    International Nuclear Information System (INIS)

    Fischer, G.R

    1999-01-01

    bibliographic data.With the whole coefficients it was made a prediction about the time involved until the total release of the radionuclides. This work is being developed by the Radioactive Waste Management Division of Cnea and it has been included in a contract with the IAEA, which also studies the changes on the mechanical resistance of the waste package,so as the release of gases from organic wastes and the container corrosion

  13. Progress of the RERTR program in 2001

    International Nuclear Information System (INIS)

    Travelli, A.

    2002-01-01

    This paper describes the 2001 progress achieved by the Reduced Enrichment for Research and Test Reactors (RERTR) Program in collaboration with its many international partners. Postirradiation examinations of microplates have continued to reveal excellent irradiation behavior of U-Mo dispersion fuels in a variety of compositions and irradiating conditions. Irradiation of two new batches of mini plates of greater sizes was completed in the ATR to investigate the swelling behavior of these fuels under prototypic conditions. These materials hold the promise of achieving the program goal of developing LEU research reactor fuels with uranium densities in the 8-9 g/cm 3 range. Qualification of the U-Mo dispersion fuels has been declared by a patent issue involving KAERI. Test fuel elements with uranium density of 6 g/cm 3 are being fabricated by BWXT and are expected to begin undergoing irradiation in the HFR-Petten reactor around March 2003, with a goal of qualifying this fuel by mid 2005. U-Mo fuel with uranium density of 8-9 g/cm 3 is expected to be qualified by mid 2007. Final irradiation tests of LEU 99 Mo targets in the RAS-GAS reactor at BATAN, in Indonesia, had to be postponed because of the 9/11 attacks, but the results collected to date indicate that these targets will soon be ready for commercial production. Excellent cooperation is also in progress with the CNEA in Argentina, MDSN/ AECL in Canada, and ANSTO in Australia. Irradiation testing of five WWR-M2 tube-type fuel assemblies fabricated by the NZChK and containing LEU UO 2 dispersion fuel was successfully completed within the Russian RERTR program. A new LEU U-Mo pin-type fuel that could be used to convert most Russian-designed research reactors has been developed by VNIJNM and is ready for testing. Four additional shipments containing 822 spent fuel assemblies from foreign research reactors were accepted by the U.S. by September 30, 2001. Altogether, 4'562 spent fuel assemblies from foreign research

  14. Argentine nuclear fuels MOX irradiated in the Petten reactor: Analysis of experience with the BACO code

    Energy Technology Data Exchange (ETDEWEB)

    Marino, A C; Perez, E; Adelfang, P [Argentine Atomic Energy Commission, Buenos Aires (Argentina)

    1997-08-01

    The irradiation of our first prototypes of MOX nuclear fuels fabricated in Argentina began in 1986. These experiences had been made in the HFR-Petten reactor, Holland. The six rods were fabricated in the {alpha} Facility (GAID-CNEA-Argentina). The first rod has been used for destructive pre-irradiation analysis in the KFK (Kernforschungszentrum Karlsruhe), Germany. The second one was a pathfinder for calibrating systems in the HFR. Another two rods included doped pellets based on iodine. One of them included CsI and auxiliary components. The second one included elemental iodine. The concentration of iodine was intended to simulate 15 MWd/ton(M) of burnup. We defined the power histories with the BACO code. We assumed a cycle of 15 days that included interaction treatments of cladding and pellet due to the power cycling. The last ramp is let run until stress corrosion cracking (SCC) is induced. The experience named BU15 was done with the last two rods. The final burnup was 15 MWd/ton(M), and a final ramp test was arranged for one of them. This burnup is the same as the previous two rods. The power level during irradiation was low and without major solicitations, only the normal shutdowns of the HFR. The ramp was similar to that used for the iodine test. We attempt to see the correct correspondence between the BU15 and the doping test. The pathfinder had an excellent behavior in the HFR reactor. The presence of microcracks inside the cladding was observed in the iodine test as we predicted with the BACO code. The post-irradiation tests of the BU15 experience has just ended. The development of the ramp was interrupted due to an increase of activity in the system. We presumed the presence of a failure in the rod. The visual inspection of the rod shows an atypical failure for this kind of fuel, i.e. they found a small circular hole. We use the BACO code for the behavior analysis of the fuel rods. 23 refs, 29 figs, 5 tabs.

  15. Water chemistry of Atucha II PHWVR. Design concepts and evolution

    International Nuclear Information System (INIS)

    Chocron, Mauricio; Rodriguez, Ivanna; Duca, Jorge; Fernandez, Ricardo; Rico, Jorge

    2007-01-01

    Full text: Atucha II is a pressurized heavy water vessel reactor designed by Siemens-KWU, currently part of AREVA NP, of 745 MWe and similar to Atucha I, which has been in operation over 25 years. The primary heat transport system (PHTS) is composed by vertical channels (277-313 C degrees) that allocate the fuel elements while the moderator circuit is composed by a partially separated circuit (142-173 C degrees). The moderation power is transferred to the feedwater through the moderator heat exchangers (HX). These HXs operate as the last, high pressure water-steam cycle heaters as well. Materials (with exception of fuel channels and fuel sheaths which are made of zirconium alloys) are all austenitic steels while cobalt containing alloys have been all replaced at the design stage. Steam generator and moderator HX tubing are Alloy 800 made. The core is operated without boron except with the first fresh nucleus. The secondary circuit or Balance of plant (BOP) is similar in conception to that of a PWR but the moderator HXs. It is entirely built of ferrous alloys, has a feedwater-deaerator tank and moisture separator. The energy sink is the Rio de la Plata River. The Reactors Chemistry Department, Chemistry Division, National Atomic Energy Commission, in its character of R and D institution has been committed by CNA II-N.A.S.A Project to prepare the water chemistry specifications, water chemistry engineering and manuals, considering the type of reactor, design and construction aspects and operation characteristics, taking into account the current state-of-the art and worldwide standards. This includes conceptual aspects and implementation and operative aspects as well. This documentation will be released after a designer's review as it has been stated in the respective agreement. Respecting the confidentiality agreement between CNEA and NASA and the confidentiality regarding handling original documentation provided by the designer, it is considered illustrative to

  16. Progress on DART code optimization

    International Nuclear Information System (INIS)

    Taboada, Horacio; Solis, Diego; Rest, Jeffrey

    1999-01-01

    This work consists about the progress made on the design and development of a new optimized version of DART code (DART-P), a mechanistic computer model for the performance calculation and assessment of aluminum dispersion fuel. It is part of a collaboration agreement between CNEA and ANL in the area of Low Enriched Uranium Advanced Fuels. It is held by the Implementation Arrangement for Technical Exchange and Cooperation in the Area of Peaceful Uses of Nuclear Energy, signed on October 16, 1997 between US DOE and the National Atomic Energy Commission of the Argentine Republic. DART optimization is a biannual program; it is operative since February 8, 1999 and has the following goals: 1. Design and develop a new DART calculation kernel for implementation within a parallel processing architecture. 2. Design and develop new user-friendly I/O routines to be resident on Personal Computer (PC)/WorkStation (WS) platform. 2.1. The new input interface will be designed and developed by means of a Visual interface, able to guide the user in the construction of the problem to be analyzed with the aid of a new database (described in item 3, below). The new I/O interface will include input data check controls in order to avoid corrupted input data. 2.2. The new output interface will be designed and developed by means of graphical tools, able to translate numeric data output into 'on line' graphic information. 3. Design and develop a new irradiated materials database, to be resident on PC/WS platform, so as to facilitate the analysis of the behavior of different fuel and meat compositions with DART-P. Currently, a different version of DART is used for oxide, silicide, and advanced alloy fuels. 4. Develop rigorous general inspection algorithms in order to provide valuable DART-P benchmarks. 5. Design and develop new models, such as superplasticity, elastoplastic feedback, improved models for the calculation of fuel deformation and the evolution of the fuel microstructure for

  17. Intercomparison of techniques for inspection and diagnostics of heavy water reactor pressure tubes: Flaw detection and characterization [Phase 1] [Sample summary reports of pressure tube samples from Argentina, India, Canada, Republic of Korea, and Romania

    International Nuclear Information System (INIS)

    2006-05-01

    Nuclear power plants with heavy water reactors (HWRs) comprise nine percent of today's operating nuclear units, and more are under construction. Efficient and accurate inspection and diagnostic techniques for various reactor components and systems are an important factor in assuring reliable and safe plant operation. To foster international collaboration in the efficient and safe use of nuclear power, the IAEA conducted a Coordinated Research Programme (CRP) on Inter-comparison of Techniques for HWR Pressure Tube Inspection and Diagnostics. This CRP was carried out within the frame of the IAEA Department of Nuclear Energy's Technical Working Group on Advanced Technologies for HWRs (the TWG-HWR). The TWG-HWR is a group of experts nominated by their governments and designated by the IAEA to provide advice and to support implementation of the IAEA's project on advanced technologies for HWRs. The objective of the CRP was to inter-compare non-destructive inspection and diagnostic techniques, in use and being developed, for structural integrity assessment of HWR pressure tubes. During the first phase of this CRP, participants have investigated the capability of different techniques to detect and characterize flaws. During the second phase of this CRP, participants collaborated to detect and characterize hydride blisters and to determine the hydrogen concentration in Zirconium alloys. The intent was to identify the most effective pressure tube inspection and diagnostic methods, and to identify further development needs. The organizations that have participated in this CRP are: - The Comision Nacional de Energia Atomica (CNEA), Argentina; - Atomic Energy of Canada Ltd. (AECL); Chalk River Laboratories (CRL), Canada; - The Research Institute of Nuclear Power Operations (RINPO), China National Nuclear Corporation (CNNC), China; - Bhabha Atomic Research Centre (BARC), India; - The Korea Electric Power Research Institute (KEPRI), Republic of Korea; - The Korea Atomic Energy

  18. Evaluation of dose due to the liberation of the radioactive content present in systems of final disposal of radioactive residues

    International Nuclear Information System (INIS)

    Amado, V.; Lopez, F.

    2006-01-01

    The disposal systems of radioactive residuals well-known as repositories near to the surface, are used to dispose residuals that can contain high concentrations of radionuclides of period of short semi disintegration, which they would decay at levels radiologically insignificant in some few decades or in some centuries: and acceptably low concentrations of radionuclides of period of long semi disintegration. The dose that would receive the critic group due to these systems it could be increased by cause of discreet events that affect the foreseen retard time, or by the gradual degradation of the barriers. To this last case it contributes the presence of water, because it implies leaching and dissolution that can give place to radionuclide concentrations in the underground water greater to the prospective ones. The dosimetric evaluation is important because it offers useful objective information to decide if a given repository is adjusted to the purposes of its design and it fulfills the regulatory requirements. In this work a simplified evaluation of the dose that would receive the critic group due to the liberation of contained radionuclides in a hypothetical system of final disposition of radioactive residuals is presented. For it, they are considered representative values of the usually contained activities in this type of systems and they are carried out some approaches of the source term. The study is developed in two stages. In the first one, by means of the Radionuclide pollutant scattering pattern in phreatic aquifers (DRAF) it is considered the scattering of the pollutants in the phreatic aquifer, until the discharge point in the course of the nearest surface water. This model, developed originally in the regulatory branch of the National Commission of Argentine Atomic Energy (CNEA); it solves the transport equation of solutes in porous means in three dimensions, by the finite differences method having in account the soil retention and the radioactive

  19. Evaluation of dose due to the liberation of the radioactive content present in systems of final disposal of radioactive residues; Evaluacion de la dosis debida a la liberacion del contenido radiactivo presente en sistemas de disposicion final de residuos radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Amado, V; Lopez, F [Autoridad Regulatoria Nuclear, Av. Del Libertador 8250, Ciudad Autonoma de Buenos Aires (C1429BNP) (Argentina)

    2006-07-01

    The disposal systems of radioactive residuals well-known as repositories near to the surface, are used to dispose residuals that can contain high concentrations of radionuclides of period of short semi disintegration, which they would decay at levels radiologically insignificant in some few decades or in some centuries: and acceptably low concentrations of radionuclides of period of long semi disintegration. The dose that would receive the critic group due to these systems it could be increased by cause of discreet events that affect the foreseen retard time, or by the gradual degradation of the barriers. To this last case it contributes the presence of water, because it implies leaching and dissolution that can give place to radionuclide concentrations in the underground water greater to the prospective ones. The dosimetric evaluation is important because it offers useful objective information to decide if a given repository is adjusted to the purposes of its design and it fulfills the regulatory requirements. In this work a simplified evaluation of the dose that would receive the critic group due to the liberation of contained radionuclides in a hypothetical system of final disposition of radioactive residuals is presented. For it, they are considered representative values of the usually contained activities in this type of systems and they are carried out some approaches of the source term. The study is developed in two stages. In the first one, by means of the Radionuclide pollutant scattering pattern in phreatic aquifers (DRAF) it is considered the scattering of the pollutants in the phreatic aquifer, until the discharge point in the course of the nearest surface water. This model, developed originally in the regulatory branch of the National Commission of Argentine Atomic Energy (CNEA); it solves the transport equation of solutes in porous means in three dimensions, by the finite differences method having in account the soil retention and the radioactive

  20. Behaviour Test with the Leaching of a Waste package; Evaluacion del Comportamiento frente a la Lixiviacion de un Bulto de Residuo Acondicionado

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, G R [Instituto Balseiro, Universidad Nacional de Cuyo, Centro Atomico Bariloche, Universidad de Buenos Aires (Argentina)

    1999-07-01

    bibliographic data.With the whole coefficients it was made a prediction about the time involved until the total release of the radionuclides. This work is being developed by the Radioactive Waste Management Division of Cnea and it has been included in a contract with the IAEA, which also studies the changes on the mechanical resistance of the waste package,so as the release of gases from organic wastes and the container corrosion.