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Sample records for central nuclear de zorita-1

  1. Desarrollo de proveedores para la industria nuclear argentina Visión desde las Centrales Nucleares

    Directory of Open Access Journals (Sweden)

    DOMINGO QUILICI

    2013-06-01

    Full Text Available Frente al inicio de una nueva etapa en la instalación de capacidad núcleo eléctrica en el país, se recorrerá la historia del desarrollo de la industria nuclear nacional (1964-1986 en búsqueda de antecedentes útiles para esta nueva realidad. Partiendo de la intención de dar repuesta a las preguntas: ¿Por qué se decidió tan tempranamente construir una central nuclear (en adelante CN; ¿por qué se decidió comprarla con una modalidad particular de los contratos “llave en mano”, en vez del desarrollo de una versión “criolla”? Y cuál fue el significado de la apertura del “paquete tecnológico” en aquel momento; se indagará sobre los antecedentes del desarrollo de proveedores para la industria nuclear en la Argentina. Se describirán las acciones que llevaron a la compra de las centrales de Atucha I, Embalse y Atucha II y como a partir de esas decisiones se implementaron políticas para maximizar la participación nacional en la construcción de las mismas y para la transferencia de tecnología del exterior hacia la industria local. Se analizará el Plan Nuclear puesto en vigencia a fines de los años setenta, desde el punto de vista de su influencia sobre el desarrollo tecnológico endógeno. Abstract The history of the development of national nuclear industry (1964-1986 will be reviewed in the search of useful patterns for the present new phase in the installation of nucleo-electric capacity in the country Precedents of development of suppliers for the argentinean nuclear industry will be considered, taking as starting point the following questions: Why the early decision of constructing a Nuclear Power Plant was taken? Why was it decided to buy it under a peculiar version of a turnkey contract instead of developing a “native” design? What were the implications of opening “technological packages” at that time? Actions leading to the construction of Atucha I, Embalse and Atucha II stations will be described, as well

  2. Desarrollo e implantación en un APS de una metodologia para identificar los fallos de inicio de vida en una Central Nuclear

    OpenAIRE

    González Celades, María

    2015-01-01

    El proyecto Desarrollo e implantación en un Análisis Probabilista de Seguridad de una metodología para identificar los fallos de inicio de vida en una central nuclear tiene como objetivo el desarrollo de una herramienta para identificar qué fallos de componente forman parte del período de inicio de infancia, de una central nuclear. Estos fallos deberían ser eliminados de la Base de Datos del Análisis Probabilista de Seguridad (BD APS) ya que no son representativos de la operación real de la c...

  3. AP1000, a nuclear central of advanced design; AP1000, una central nuclear de diseno avanzado

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez M, N.; Viais J, J. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)]. e-mail: nhm@nuclear.inin.mx

    2005-07-01

    The AP1000 is a design of a nuclear reactor of pressurized water (PWR) of 1000 M We with characteristic of safety in a passive way; besides presenting simplifications in the systems of the plant, the construction, the maintenance and the safety, the AP1000 is a design that uses technology endorsed by those but of 30 years of operational experience of the PWR reactors. The program AP1000 of Westinghouse is focused to the implementation of the plant to provide improvements in the economy of the same one and it is a design that is derived directly of the AP600 designs. On September 13, 2004 the US-NRC (for their initials in United States- Nuclear Regulatory Commission) approved the final design of the AP1000, now Westinghouse and the US-NRC are working on the whole in a complete program for the certification. (Author)

  4. Estudios de apoyo a la preparación de procedimientos de ejecución de cálculos de seguridad y operación de una central nuclear con modelos integrales de planta

    OpenAIRE

    Rodríguez Moya, Rafael

    2007-01-01

    La Sección de Ingeniería Nuclear de la Universidad Politécnica de Cataluña, ha colaborado desde 1991 con las plantas nucleares de Ascó y Vandellós con el objetivo, entre otros, de conseguir un modelo validado y documentado de estas centrales. Es por ello que se tiene como objetivo continuo y principal, la mejora y validación de estos modelos, aumentando así la calidad de los datos obtenidos. Siendo la finalidad de esta mejora obtener una óptima y más segura explotación de las p...

  5. Nuclear power plants making a comeback in Japan; El retorno de la centrales nucleares en Japon

    Energy Technology Data Exchange (ETDEWEB)

    Torralbo, J. R.

    2016-08-01

    We reproduce in this magazine the interesting article published by the president of the SNE in issue 46 of Cuadernos de Energia in October 2015, which describes the events that have taken place since the March 11, 2011 earthquake in Japan, the largest in its history, and the subsequent tsunami, which affected the Fukushima power plant, as well as the measures implemented since then and how some of this country nuclear power plants are being started up again. (Author)

  6. Development of 3D models of buildings for containment of the nuclear power plant of Almaraz and of the Trillo Nuclear with the GOTHIC 8.0 code; Desarrollo de modelos 3D de los edificios de conten cion de la Central Nuclear de Almaraz y de la Central Nuclear de Trillo con el codigo GOTHIC 8.0

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez, G.; Bocanegra Melian, R.; Fernandez Cosils, K.; Barreira Pereira, P.; Rey Peinado, L.; Posada Barral, J. M.

    2014-07-01

    The objective of the first phase of the research of CNAT and the UPM project is the construction of several three-dimensional models detailed GOTHIC 8.0 code of containment of a buildings plant type PWR-W and KWU, corresponding to the Central Nuclear de Almaraz (CNA) and Trillo (CNT) respectively. (Author)

  7. Nuclear emergency buildings of Asco and Vandellos II nuclear power plants; Centros alternativos de emergencias de las centrales nucleares de Asco y Vandellos II

    Energy Technology Data Exchange (ETDEWEB)

    Massuet, J.; Sabater, J.; Mirallas Esteban, S.

    2016-08-01

    The Nuclear Emergency Buildings sited at Asco and Vandellos II Nuclear Power Plants (NPP) are designed to safety manage emergencies in extreme situations, beyond the design basis of the Nuclear Power Plants. Designed in accordance with the requirements of the Spanish Nuclear Regulator (Consejo de Seguridad Nuclear-CSN) these buildings are ready to operate over a period of 72 hours without external assistance and ensure habitability for crews of 120 and 70 people respectively. This article describes the architectural conception, features and major systems of the Nuclear Emergency Buildings sited at Asco and Vandellos II. (Author)

  8. ¿Es cierto que una central térmica de carbón da lugar a más emisiones radiactivas que una central nuclear?

    Directory of Open Access Journals (Sweden)

    J.A. Menéndez

    2009-08-01

    Full Text Available Se ha dicho que, por unidad de energía producida, una central térmica de carbón emite, principalmente en las cenizas volantes, una cantidad de radiactividad 100 veces superior a la que emite una central nuclear de fisión. ¿Es esto cierto?

  9. ¿Es cierto que una central térmica de carbón da lugar a más emisiones radiactivas que una central nuclear?

    OpenAIRE

    J.A. Menéndez

    2009-01-01

    Se ha dicho que, por unidad de energía producida, una central térmica de carbón emite, principalmente en las cenizas volantes, una cantidad de radiactividad 100 veces superior a la que emite una central nuclear de fisión. ¿Es esto cierto?

  10. Evaluation of cable ageing in Nuclear Power Plants; Evaluacion del envejecimiento de cables en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Vergara, T. [Empresarios Agrupados, A. I. E. Madrid (Spain); Alonso Chicote, J. [TECNATOM, S. A. (Spain); Burnay, S. [AEA Technology (UK)

    2000-07-01

    The majority of power, control and instrumentation cables in nuclear power plants use polymers as their basic material for insulation and jacket. In many cases, these cables form part of safety-related circuits and should therefore be capable of operating correctly under both normal and accident conditions. Since polymeric materials are degraded by the long term action of the radiation and thermal environments found in the plant, it is important to be able to establish the cable condition during the plant lifetime. Nowadays there are a number of different methods to evaluate the remaining lifetime of cables. In the case of new plants, or new cables in old plants, accelerated ageing tests and predictive models can be used to establish the behaviour of the cable materials under operating conditions. There are verified techniques and considerable experience in the definition of predictive models. This type of approach is best carried out during the commissioning stage or in the early stages of operation. In older plants, particularly where there is a wide range of cable types in use, it is more appropriate to use condition monitoring methods to establish the state of degradation of cables in-plant. Over the last 10 years there have been considerable developments in methods for condition monitoring of cables and a tool-box of practical techniques are now available. There is no single technique which is suitable for all cable materials but the range of methods covers nearly all of the types currently in use, at present, the most established methods are the indented, thermal analysis (OIT, OITP and TGA) and dielectric loss measurements, All of these are either non-destructive methods or require only micro-samples of material. (Author) 15 refs.

  11. Statistical analysis of the wind around a nuclear power plant; Analisis estadistico del viento alrededor de una central nucleoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Tejeda, A; Alvarez, Oscar; Contreras, A. D.; Jauregui, E. [Universidad Veracruzana, (Mexico)

    1996-12-31

    In order to show an appropriate methodology for the climatic analysis of the wind, some of the recent results in the investigation of the field flow around the Laguna Verde Nuclear Power Station, at Veracruz State (Mexico,) through the angular correlation coefficients and contingency tables among the registered wind directions by a meteorological tower at the levels of 10 and 60 meters high are presented. Finally, by applying an objective analysis of the data some conclusions are obtained in connection with the local winds with the mesoscale systems. [Espanol] Con el objeto de mostrar una metodologia apropiada en el analisis climatico del viento, se presentan algunos resultados recientes en la investigacion del campo de flujo en los alrededores de la central nucleoelectrica de Laguna Verde, Veracruz (Mexico), a traves de los coeficientes de correlacion angulares y de tablas de contingencia entre las direcciones del viento registradas por una torre meteorologica en los niveles de 10 y 60 metros de altura. Finalmente, aplicando analisis objetivo de los datos, se obtienen algunas conclusiones sobre la conexion de los vientos locales con los sistemas de mesoescala.

  12. Life management plants at nuclear power plants PWR; Planes de gestion de vida en centrales nucleares PWR

    Energy Technology Data Exchange (ETDEWEB)

    Esteban, G.

    2014-10-01

    Since in 2009 the CSN published the Safety Instruction IS-22 (1) which established the regulatory framework the Spanish nuclear power plants must meet in regard to Life Management, most of Spanish nuclear plants began a process of convergence of their Life Management Plants to practice 10 CFR 54 (2), which is the current standard of Spanish nuclear industry for Ageing Management, either during the design lifetime of the plant, as well as for Long-Term Operation. This article describe how Life Management Plans are being implemented in Spanish PWR NPP. (Author)

  13. Negative sequence relay applied to generator 1 of the Laguna Verde nuclear power plant; Aplicacion de un relevador de secuencia negativa en el generador 1 de la central de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Diaz de la Serna P, Enrique [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1988-12-31

    The rotor of a synchronous generator can be dangerously heated in a short time by stator current unbalance, therefore it must be protected with a specific relay. This article discusses the protection and the adjustments selected for Unit 1 of the Comision Federal de Electricidad Laguna Verde Nuclear Nuclear Power Station. [Espanol] El rotor de un generador sincrono puede calentarse peligrosamente en un tiempo corto debido a desbalance de corrientes en el estator, por lo que debe protegerse con un relevador especifico. En este articulo se describen la proteccion y los ajustes seleccionados para la unidad 1, de la central nucleoelectrica Laguna Verde de la Comision Federal de Electricidad.

  14. Modularization in construction processes New Nuclear Power Plants; Modularizacion en procesos de construccion de Nuevas Centrales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Martinez, I.; Cobos, A.; Herrera Ropero, D.

    2012-07-01

    The aim of this work is that it has the capacity and expertise to analyze the suitability of modular technology design and construction compared to conventional nuclear plants. It will define the criteria for selecting the areas of modularity and the impact on design and its interfaces with engineering, supply, including logistics and construction.

  15. Statistical analysis about corrosion in nuclear power plants; Analisis estadistico de la corrosion en centrales nucleares de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Naquid G, C.; Medina F, A.; Zamora R, L. [Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencia de Materiales, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2000-07-01

    Nowadays, it has been carried out the investigations related with the structure degradation mechanisms, systems or and components in the nuclear power plants, since a lot of the involved processes are the responsible of the reliability of these ones, of the integrity of their components, of the safety aspects and others. This work presents the statistics of the studies related with materials corrosion in its wide variety and specific mechanisms. These exist at world level in the PWR, BWR, and WWER reactors, analysing the AIRS (Advanced Incident Reporting System) during the period between 1993-1998 in the two first plants in during the period between 1982-1995 for the WWER. The factors identification allows characterize them as those which apply, they are what have happen by the presence of some corrosion mechanism. Those which not apply, these are due to incidental by natural factors, mechanical failures and human errors. Finally, the total number of cases analysed, they correspond to the total cases which apply and not apply. (Author)

  16. Design optimization of the Laguna Verde nuclear power station fuel recharge; Optimacion del diseno de recargas de combustible para la Central Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Cortes Campos, Carlos Cristobal [Instituto de Investigaciones Electricas, Cuernavaca (Mexico); Montes Tadeo, Jose Luis [Instituto Nacional de Investigaciones Nucleares (ININ), Salazar (Mexico)

    1991-12-31

    It is described, in general terms, the procedure that is followed to accomplish the optimization of the recharge design, and an example is shown where this procedure was applied for the analysis of the type BWR reactor of Unit No. 1 of the Laguna Verde Nuclear Power Station. [Espanol] Se describe en terminos generales el procedimiento que se sigue para realizar la optimacion del diseno de recargas, y se muestra un ejemplo en el que se utilizo dicho procedimiento para el analisis del reactor tipo BWR de la unidad 1, de la Central Laguna Verde (CLV).

  17. Treatment of operational experience of nuclear power plants in WANO; Tratamiento de la experiencia operativa de las centrales nucleares en WANO

    Energy Technology Data Exchange (ETDEWEB)

    Ibanez, M.

    2013-09-01

    The article describes the activities associated to the Operating Experience Programme of the World Association of Nuclear Operators. The programme manages the event reports submitted by the nuclear power plants to the WANO database for the preparation by the Operating Experience Central Team of some documents like the significant Operating Experience Reports and Significant Event Reports that help the stations to avoid similar events. (Author)

  18. Internalization of externalities in the generation costs of electric power centrals of carbon, combined cycle and nuclear; Internalizacion de externalidades en los costos de generacion de centrales electricas de carbon, ciclo combinado y nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Gomez R, M.C. [Universidad Anahuac del Norte (Mexico); Palacios H, J.; Ramirez S, R.; Alonso V, G. [ININ, Carretera Mexico-Toluca Km. 36.5 Ocoyoacac 52750 Edo. de Mexico (Mexico)]. e-mail: fgrivera@avantel.net

    2007-07-01

    The technologies of electric power generation that use fossil fuels, they incorporate in the Even Total Cost of Generation (CTNG) only the direct costs of generation (investment, fuel costs, operation costs and maintenance). nevertheless, the nuclear energy incorporates besides the direct costs, the externalities that causes to the human health and the environment. In this work the CTNG is calculated that incorporates the externalities, of a thermoelectric power station of coal, a plant of combined cycle and of four reactors of Generation III (ABWR, ACR, AP1000 and EPR). The obtained results show that the nuclear power station has smaller CTNG that the technologies that use fossil fuels. It is important to stand out that they are only considering the externalities of the stage of electricity generation, for what the mining phase and transport of the fuel toward the central are not considered in the present document. (Author)

  19. Management of distortion channels in the Cofrentes NPP; Gestion de la deformacion de canales en la central nuclear de Cofrentes

    Energy Technology Data Exchange (ETDEWEB)

    Albendea, J. C.; Garcia, P. J.; Iglesias, J.; Mascarell, R.

    2015-07-01

    Fuel channels distortion in BWR (Boiling Water Reactor) reactors may have implication for safety. This phenomenon is complex and, at the present time it is not known in detail. This article provides the Iberdrola Generacion Nuclear SAU ongoing activities to know, predict and mitigate the consequences that this phenomenon may cause in Cofrentes Nuclear Power Plant. (Author)

  20. Determination of activity by gamma spectrometry of radionuclides present in drums of residues generated in nuclear centrals; Determinacion de actividad por espectrometria gamma de radionucleidos presentes en tambores de residuos generados en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, J.C.; Fernandez, J. [Autoridad Regulatoria Nuclear, Av. Del Libertador 8250, Ciudad Autonoma de Buenos Aires (Argentina)]. e-mail: jaguiar@cae.arn.gov.ar

    2006-07-01

    The generation of radioactive residuals in nuclear centrals as CNA I (Atucha I Nuclear Central) and CNE (Embalse Nuclear Central) makes that the measurement of those radionuclides has been a previous stage to the waste management. A method used in those nuclear centrals it is the gamma spectrometry with HPGe detectors, previous to the immobilization of the residual in a cemented matrix, with this the contact with the external agents and its possible dispersion to the atmosphere in the short term is avoided. The ARN (Nuclear Regulatory Authority) of Argentina it carries out periodically intercomparisons and evaluations of the measurement and procedures systems used in the nuclear power stations for the correct measurement and determination of activity of radioactive residuals by gamma spectrometry. In this work an independent method of measurement is exposed to the nuclear power stations. To determine the activity of the residuals by gamma spectrometry deposited in drums, it is required of the precise knowledge of the efficiency curve for such geometry and matrix. Due to the RNA doesn't have a pattern of these characteristics, a mathematical model has been used to obtain this efficiency curve. For it, it is necessary to determine previously: 1) the geometric efficiency or solid angle sustained by the source-detector system (drum-detector) applying a mathematical model described in this work. 2) To estimate the auto-attenuation factor that present the photons in the cemented matrix, these calculations are carried out with a simple equation and its are verified with the Micro Shield 6.10 program. The container commonly used by these nuclear power stations its are drums for 220 liters constructed with SAE 1010 steel and with a thickness of 0.127 cm, with an approximate weight 7.73 Kg., internal diameter of 57.1 cm, and height: 87 cm. The results obtained until the moment register a discrepancy from 5 to 10% with relationship to the measurements carried out by the

  1. Modernization of electric power systems of the Laguna Verde Nuclear Power Plant; Modernizacion de los sistemas electricos de potencia de la Central Nuclear de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Gabaldon, M. A.; Gonzalez, J. J.; Prieto, I.

    2011-07-01

    The Power Increase Project of Laguna Verde Nuclear Plant has entailed the replacement, in one unique outage, of the main power electrical systems of the Plant (Isolated Phase Bars, Generator Circuit Breaker and Main Transformer) as well as the replacement of the Turbo-group. The simultaneous substitution of these entire system has never been done by any other Plant in the world, representing an engineering challenge that embraced the design of the new equipment up to the planning, coordination and management of the construction and commissioning works, which were successfully carried out by Iberdrola within the established outage period /47 days) for both units. (Author)

  2. Environmental management systems implemented in the Spanish nuclear power plants; Sistemas de gestion ambiental implantados en las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Redondo, R.; Fernandez Guisado, M. B.; Hortiguela, R.; Bustamante, L. F.; Esparza, J. L.; Villareal, M.; Yague, F.

    2013-09-01

    The companies that own the Spanish Nuclear Power Plants, aware of social concern and in the context of a growing demanding environmental legislation, have a permanent commitment to the electricity production based on the principles of a maximum respect for the environment, safety, quality, professionalism and continuous improvement. In order to minimize the environmental impact of their plants they have implemented and Environmental Management System based on the ISO 14001 Standard. They minimize the environmental impact by identifying the significant environmental aspects and defining the corresponding objectives. This article describes the referred environmental management systems and their environmental objectives, as applied and defined by the Spanish Nuclear Power Plants. (Author)

  3. Analysis of the evolution of the collective dose in nuclear power plants in Spain; Analisis de la evolucion de la dosis colectiva en las centrales nucleares de Espana

    Energy Technology Data Exchange (ETDEWEB)

    Ponjuan Reyes, G.; Ruibia Rodiz, M. A. de la; Rosales Calvo, M.; Labarta Mancho, T.; Calavia Gimenez, I.

    2011-07-01

    This article presents an analysis of the evolution of occupational collective dose of the Spanish nuclear power plants during the period 2000 - 2008 within the international context, by the Nuclear Safety Council (CSN) in order to have information contrasted to assessing the extent of application of the ALARA criteria in the Spanish plants and identify areas of priority attention.

  4. Improvements to the wastewater treatment from the beginning of the operation of Nuclear Asco; Mejoras en la depuracion de aguas residuales desde el inicio de la explotacion de la Central Nuclear de Asco

    Energy Technology Data Exchange (ETDEWEB)

    Esparza Martin, J. L.; Boronat Medico, M.

    2014-07-01

    Sanitary sewage in the Central Nuclear de Asco (CNA), are subject to a series of physico-chemical and biological processes in the wastewater waste (WWTP) before being discharged to the River Ebro. Since the beginning of the exploitation of CNA, the number of workers and administrative restrictions have evolved so that they have forced the execution of modifications of lowest and highest wingspan to comply with applicable legal requirements in the field of discharges. The overall objective of this work is to present the different stages of evolution of the WWTP of CNA from the start of operation of the plant up to the present day. The specific objective is to show the latest enhancements implanted in the sewage treatment plant and the benefits obtained. With technical improvements carried out in the WWTP of CNA, fixed the problem of disposal coming from the central nitrogen, one of the key problems and reason of failure to comply with the parameters imposed by the administration. (Author)

  5. The service lifetime of Spain's nuclear plants; La vida util de las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez-Bolanos, M.

    2008-07-01

    In recent years consideration has been given to the long-term operation of nuclear reactors, beyond their originally foreseen design lifetime. This article analyses the legal and safety requirements that this implies, in the wake of the document dealing with this issue that was approved by the Plenary of the CSN in April 2005. The article is completed with an interview with Dale Klein, president of the United States regulatory body, in which he describes the experience accumulated in his country, where lifetime extensions have already been approved for 50 plants. (Author)

  6. Centrales nucleares en España : el parón nuclear

    OpenAIRE

    Sanz Díaz, Benito (1949-)

    1984-01-01

    Este libro constituye una oportuna y valiosa contribución a ese necesario debate nacional sobre la energía nuclear. Tiene como objetivo la central nuclear de Cofrentes, una de las postreras y más singulares —tanto por su modelo como por su emplazamiento e historia de construcción— de las centrales nucleares que entrarán en funcionamiento en nuestro país. El libro, sin embargo, aporta información sobre la totalidad del programa nuclear español y su permanente visión económica garantiza la vía ...

  7. Nuclear safety and renewals of authorisations for operation of plants nuclear in the law of sustainable economy; La seguridad nuclear y las renovaciones de las autorizaciones de funcionamiento de las centrales nucleares en la ley de economia sostenible

    Energy Technology Data Exchange (ETDEWEB)

    Bello Paredes, S. A.

    2011-07-01

    Depending on the nature of the activity to develop, the legislation establishes a different typology of administrative authorizations that must ensure the adaptation to law for all activity relating to nuclear facilities, from the planning stage of activity, to its closing and dismantling.

  8. Nuclear Energy in Central Europe 98, Proceedings

    International Nuclear Information System (INIS)

    Regional Meeting for Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 63 articles from Slovenia, sorounding countries and countries of the Central and Eastern European Region. Topics are: Research Reactors, Nuclear Methods, Reactor Physics, Thermal Hydraulics, Structural Analysis, Probabilistic Safety Assessment, Severe Accidents, NPP Operation and Nuclear Waste disposal

  9. Análisis de secuencias de accidente de pérdida de refrigerante en centrales nucleares de agua a presión mediante la metodología ISA

    OpenAIRE

    González Cadelo, Juan

    2015-01-01

    El accidente de pérdida de refrigerante (LOCA) en un reactor nuclear es uno de los accidentes Base de Diseño más preocupantes y estudiados desde el origen del uso de la tecnología de fisión en la industria productora de energía. El LOCA ocupa, desde el punto de vista de los análisis de seguridad, un lugar de vanguardia tanto en el análisis determinista (DSA) como probabilista (PSA), cuya diferenciada perspectiva ha ido evolucionando notablemente en lo que al crédito a la actuación de las salv...

  10. Modular plant of electro chlorination of seawater for nuclear power plants; Planta modular de electrocloracion de agua de mar para centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Dumas, H.; Sesma, J. L.

    2015-07-01

    Iberdola Engineering and Construction has supplied the seawater electro chlorination plant for the EPR of Flamanville 3. The plant produces sodium hypochlorite from the electrolysis of the seawater and injects it continuously to protect the cooling circuits against the marine flora and fauna. As a consequence of the problems faced during the erection of the plant, Iberdola Engineering and construction develops an innovation project to design a modular electro chlorination system for Nuclear Power Plants. The result is a competitive product that reduces significantly the installation costs and the delivery data. (Author)

  11. 30 years in the Veracruz state coast landscape: Laguna Verde nuclear power station. 1. ed.; 30 anos de paisaje costero veracruzano: Central Nucleoelectrica Laguan Verde

    Energy Technology Data Exchange (ETDEWEB)

    Guevara, S; Moreno Casasola, P; Castillo Campos, G; Dorantes, C; Gonzalez Garcia, F; Halffter, G; Isunza, E; Lot H, A; Mendoza, R; Paradowska, K; Priego, A; Sanchez Vigil, C; Vazquez, G [Comision Federal de Electricidad and Instituto Nacional de Ecologia A.C. (Mexico)

    2008-07-01

    results of the environmental measurements also demonstrate that the nuclear option of electrical energy generation, when it is operated with safety and efficiency, is one of the friendlier forms with the environment of power generation. [Spanish] Hace 36 anos nacio uno de los proyectos energeticos mas importantes de Mexico; el diseno y construccion de la Central Nuclear Laguna Verde. Este proyecto se volvio realidad gracias al compromiso de un grupo de profesionistas mexicanos que dieron lo mejor de ellos para su realizacion. En Mexico no existia en ese momento una legislacion que contemplara la proteccion del medio ambiente; sin embargo, la Constitucion preve que cuando en el pais no exista legislacion para el desarrollo de un proyecto. Este debe adoptar la legislacion del pais que lo esta vendiendo. En el caso especifico de Laguna Verde, se adopto la legislacion de los Estados Unidos de America y en la parte ambiental se tuvo que realizar el primer Manifiesto de Impacto Ambiental, que se titulo Informe ambiental para la construccion de la Central Nuclear Laguna Verde en el Estado de Veracruz. Este estudio lo realizaron varias instituciones tanto nacionales como extranjeras. Entre las mas sobresalientes se cuenta con: la Universidad Nacional autonoma de Mexico, el Instituto Politecnico Nacional, la Universidad Veracruzana, el Instituto Nacional para la Investigacion de los Recursos Biologicos, el Instituto de Ecologia, A.C. Con este informe, los ingenieros se dieron a la tarea de disenar y construir, los biologos y ecologos a realizar los estudios para mitigar los efectos causados al medio ambiente durante la construccion y, posteriormente, durante la operacion de la Central Nuclear. Despues de 18 anos de operacion comercial de la central se concluye el presente libro, en el cual se comparan los resultados obtenidos en 1972, cuando se iniciaron los estudios para el informe ambiental, contra los obtenidos a lo largo de este periodo. Es importante ver en los resultados de

  12. Advantages of using 3D design tools in the nuclear power plants projects; Ventajas del uso de herramientas de diseno 3D en los proyectos de centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Roldan, P.; Melendro, J.; Gomez, A.; Hermana, I.

    2011-07-01

    It there is anything that distinguished Iberdrola Ingeneria y Construccion, as part of the Iberdrola Group, it is its firm commitment to innovation and continuous improvement. This is the philosophy that led the company to its interest in three-dimensional design tools back when they were in an early stage of development : very little international implementation, lack of integration with other applications, absence of previous experiences to understand the best possible configuration for each case, etc. Nevertheless, the company was able to see the tremendous advantage of having a construction program in the early months of a project- a detailed program that could predict, and therefore avoid, the problems that, if not anticipated, would arise in the construction phase when they result in higher costs, longer time frames and a multitude of complications. This is precisely what 3D design tools offer prediction and this has been proven in the latest combined cycle projects executed with these tools. A project executed without errors not only decreases cost and time overruns, but also necessarily increases the quality of the end result. Efficiency and quality: these are both basic goals of Iberdrola Ingenieria y Construccion. The knowledge of and skill in the use of these tools have grown at the same time that their development has reached increasingly higher levels. As a result, Iberdrola Ingenieria y Conctruccion now has intensive experience in the use of 3D design tools and is preprared for the future challenges posed by these tools, the capabilities of which have attained such heights that it is possible to take on one of the most technically challenging projects that exists a nuclear power plant. And we are ready. (Author)

  13. Permission of change of limits in the vapor generators of the Atucha I Nuclear Central; Permiso de cambio de limites en los GVs de la CNA-I

    Energy Technology Data Exchange (ETDEWEB)

    Ventura, M. [Autoridad Regulatoria Nuclear, Av. Libertador 8250 (1429), Capital Federal (Argentina)]. e-mail: mventura@sede.arn.gov.ar

    2006-07-01

    In the mark of the modification of the Atucha-I Nuclear Central Installation (CNA-I) as consequence of the Introduction of the System 'Second Drain of Heat' (SSC), the Entity Responsible for the CNA-I (NASA) requested authorization to the Nuclear Regulatory Authority (ARN) to modify the value of the minimum level of water in the secondary side in the Steam generators (GVs) to activate the signal 'shoot of the Cut of the Reactor' (RESA-LLV). As the level in the GVs is one of those parameters that are used to shoot the Emergency Feeding System (RX), component of the SSC System, also was analyzed the change in the activation of the shoot signal of the 'Second Drain of Heat' (2SSC-LLV). The ARN uses for the study of the nuclear safety of nuclear power plants, the series of prediction programs RELAP5/MOD3.X. It participates of the evaluation and maintenance activities of these codes through specific agreements with the U.S. Nuclear Regulatory Commission (US-NRC). It is necessary to account with programs of this type since the ARN it licenses the construction and operation of Nuclear Power Plants (NPPs) and other outstanding facilities and it inquires its operation according to its own standards. With these tools its are auditing the calculations that the Responsible Entities of the operation make to guarantee the operability of the NPPs assisting the mentioned standards. The analysis with computational codes is used as a tool to achieve the best understanding in the behavior of the plant in union with the engineering approach, the manual calculations, the data analysis and the experience in the operation of the machine. (Author)

  14. Situación actual de la energía nuclear. Un estudio relativo al proceso constructivo de centrals nucleares

    OpenAIRE

    Tarrasón Pérez, Juan Carlos

    2011-01-01

    El importante crecimiento económico en nuestra sociedad desde mediados del siglo pasado ha estado asociado a un muy notable aumento del consumo energético, consustancial a la mejora del nivel de vida de la ciudadanía. Sin embargo, este mismo incremento, y especialmente el hecho de estar basado en un modelo energético fuertemente centrado en el uso de combustibles fósiles provoca problemas ambientales y económicos que pueden acabar frenando el desarrollo y afectar al bienestar de la humanidad....

  15. Demand of natural uranium to satisfy the requirements of nuclear fuel of new nuclear power plants in Mexico; Demanda de uranio natural para satisfacer los requerimientos de combustible nuclear de nuevas centrales nucleares en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez S, J. R.; Rios, M. del C.; Alonso, G.; Palacios H, J. [ININ, 52750 La Marquesa, Estado de Mexico (Mexico)]. e-mail: jrrs@nuclear.inin.mx

    2008-07-01

    Due to the expectation of that in Mexico new plants of nuclear energy could be installed, turns out from the interest to evaluate the uranium requirements to operate those plants and to also evaluate if the existing reserves in the country could be sufficient to satisfy that demand. Three different scenes from nuclear power plant expansion for the country are postulated here that are desirable for the diversification of generation technologies. The first scene considers a growth in the generation by nuclear means of two reactors of type ABWR that could enter operation by years 2015 and 2020, in the second considers the installation of four reactors but as of 2015 and new every 5 years, in the scene of high growth considers the installation of 6 reactors of the same type that in the other scenes, settling one every three years as of 2015. The results indicate that the uranium reserves could be sufficient to only maintain in operation to one of the reactors proposed by the time of their useful life. (Author)

  16. Conformation of an evaluation process for a license renovation solicitude of a nuclear power plant in Mexico. Part 2; Conformacion de un proceso de evaluacion para una solicitud de renovacion de licencia de una central nuclear en Mexico. Parte 2

    Energy Technology Data Exchange (ETDEWEB)

    Serrano R, M. de L., E-mail: mlserrano@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Jose Ma. Barragan 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2013-10-15

    At the present time the operation licenses in force for the reactors of the Nuclear Power Plant of Laguna Verde (NPP-L V) will expire in the year 2020 and 2025 for the Unit-1 and Unit-2, respectively, for which the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) has begun its preparation to assist a solicitude of the licensee to continue the operation of the NPP-L V. The present work has the purpose of defining the steps to continue and to generate the documents that would help in this process, as the normative, guides, procedures, regulations, controls, etc. so that the evaluation process will be effective and efficient, as much for the regulator organ as for the licensee. The advance carried out in the continuation of the conformation of an evaluation process of license renovation solicitude is also exposed, taking like base the requirements established by the CNSNS, the regulator organ of the United States (US NRC), and the IAEA for license renovation solicitude of this type. A summary of the licenses granted from the beginning of commercial operation of the NPP-L V is included, both units and the amendments to these licenses, explaining the reason of the amendment shortly and in the dates they were granted. A brief exposition of the nuclear power plants to world level that have received extension of its operation is included. The normative that can be applied in a life extension evaluation is presented, the evaluation process to continue with the guides of the US NRC, the reach of the evaluation and the minimum information required to the licensee that should accompany to their solicitude. (author)

  17. Conformation of an evaluation process for a license renovation solicitude of a nuclear power plant in Mexico; Conformacion de un proceso de evaluacion para una solicitud de renovacion de licencia de una central nuclear en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Serrano R, M. L., E-mail: mlserrano@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2012-10-15

    So that the construction stages, of operation, closing, dismantlement and the radioactive waste disposal of a nuclear power plant (NPP) are carried out in Mexico, is necessary that the operator has a license, permission or authorization for each stage. In Mexico, these licenses, permissions or authorizations are granted by the Energy Secretariat with base in the verdict of the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS). The operation licenses ar the moment effective for the reactors of the Nuclear Power Plant of Laguna Verde (NPP-L V) they will expire respectively in the year 2020 and 2025 for the Unit 1 and Unit 2, for what the CNSNS has begun its preparation before a potential solicitude of the licensee to continue the operation of the NPP-L V. Defining the process to continue and to generate the documents that would help in this phase as normalization, guides, procedures, regulations, controls, etc., is the task that intends to be carried out the regulator body so that the evaluation process is effective and efficient, so much for the same regulator body as for the licensee. This work exposes the advance that the CNSNS has in this aspect and is centered specifically in the conformation of an evaluation process of license renovation solicitude, taking as base what the regulator body of the United States of North America (US NRC) established and following to the IAEA. Also, this work includes statistical of electric power production in Mexico, licensing antecedents for the NPP-L V, a world perspective of the license renovations and the regulation of the US NRC related to the license renovation of a NPP. (Author)

  18. Actinides inventory of the nuclear power plant of Laguna Verde Unit 1; Inventario de actinidos de la Central Nuclear Laguna Verde Unidad 1

    Energy Technology Data Exchange (ETDEWEB)

    Martinez C, E.; Ramirez S, J. R. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Alonso V, G., E-mail: eduardo.martinez@inin.gob.mx [IPN, Escuela Superior de Fisica y Matematicas, Av. Instituto Politecnico Nacional s/n, U. P. Adolfo Lopez Mateos, Col. San Pedro Zacatenco, 07738 Mexico D. F. (Mexico)

    2013-10-15

    At the present time 435 nuclear power reactors exist for the electricity generation operating in the world and 63 in construction. Mexico has two reactors type BWR in the nuclear power plant of Laguna Verde. The nuclear fuel that is used in the nuclear reactors is retired of the reactor core when the energy that this contained has been extracted. This used fuel is known as spent nuclear fuel, the problem with this fuel is that was irradiated inside the reactor and continuous emitting a high radiation, as well as a significant heat quantity when being extracted, for what is necessary to maintain it in cooling and with some shielding to be protected of the radiation that emits. This objective is achieved confining the fuel in the spent nuclear fuel pool, where it is cooled and the same pool provides the necessary shielding to maintain the surroundings in safety radiation levels for the personnel that work in the power plant. An inconvenience of the pools is its limited storage capacity and that after certain time is necessary to remove the fuel, according to the established regulation to continue operating. To correct this inconvenience, two alternatives of spent fuel disposition exist, 1) the final disposition in deep geologic repositories and 2) the reprocessing and recycled of spent fuel. Each alternative presents its particularities and specific problems; however taking many years to be able to implement anyone of them. To carry out the second option, is indispensable to estimate the total mass of actinides generated in the spent nuclear fuel, that which represents to develop a methodology for it, this action is the main purpose of the present work. Inside our calculation method was necessary to appeal to diverse computation tools as the codes Origin-S and Keno V.a. Later on the obtained were compared with a problem type Benchmark, being obtained a smaller absolute error to 1.0%. (Author)

  19. Development of the process of energy transfer from a nuclear Power Plant to an intermediate temperature electrolyse; Desarrollo del proceso de transferencia de energia desde una central nuclear a un electrolizador de temperatura intermedia

    Energy Technology Data Exchange (ETDEWEB)

    Munoz Cervantes, A.; Cuadrado Garcia, P.; Soraino Garcia, J.

    2013-07-01

    Fifty million tons of hydrogen are consumed annually in the world in various industrial processes. Among them, the ammonia production, oil refining and the production of methanol. One of the methods to produce it is the electrolysis of water, oxygen and hydrogen. This process needs electricity and steam which a central nuclear It can be your source; Hence the importance of developing the transfer process energy between the two. The objective of the study is to characterize the process of thermal energy transfer from a nuclear power plant to an electrolyzer of intermediate temperature (ITSE) already defined. The study is limited to the intermediate engineering process, from the central to the cell.

  20. Questions to the reactors power upgrade of the Nuclear Power Plant of Laguna Verde; Cuestionamientos al aumento de potencia de los reactores de la Central Nuclear de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Salas M, B., E-mail: salasmarb@yahoo.com.mx [UNAM, Facultad de Ciencias, Departamento de Fisica, Circuito exterior s/n, Ciudad Universitaria, 04510 Mexico D. F. (Mexico)

    2014-08-15

    The two reactors of the Nuclear Power Plant of Laguna Verde (NPP-L V) were subjected to power upgrade labors with the purpose of achieving 20% upgrade on the original power; these labors concluded in August 24, 2010 for the Reactor 1 and in January 16, 2011 for the Reactor 2, however in January of 2014, the NNP-L V has not received by part of the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) the new Operation License to be able to work with the new power, because it does not fulfill all the necessary requirements of safety. In this work is presented and analyzed the information obtained in this respect, with data provided by the Instituto Federal de Acceso a la Informacion Publica y Proteccion de Datos (IFAI) and the Comision Federal de Electricidad (CFE) in Mexico, as well as the opinion of some workers of the NPP-L V. The Governing Board of the CFE announcement that will give special continuation to the behavior on the operation and reliability of the NPP-L V, because the frequency of not announced interruptions was increased 7 times more in the last three years. (Author)

  1. Notions and methodologies for uncertainty analysis in simulations of transitory events of a nuclear central; Nociones y metodologias para analisis de incertidumbre en simulaciones de eventos transitorios de una central nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Alva N, J. [IPN, Escuela Superior de Fisica y Matematicas, Departamento de Ingenieria Nuclear, Avenida IPN S/N Colonia Lindavista, 07738 Mexico D.F. (Mexico); Ortiz V, J.; Amador G, R.; Delfin L, A. [ININ, Carretera Mexico-Toluca SN La Marquesa, 52750 Ocoyoacac, Estado de Mexico (Mexico)]. e-mail: neriaesfm@gmail.com

    2007-07-01

    The present work has as objective to gather the basic notions related with the uncertainty analysis and some of the methodologies to be applied in the studies of transitory events analysis of a nuclear power station, in particular of those thermal hydraulics phenomena. The concepts and methodologies mentioned in this work are the result of an exhaustive bibliographical investigation of the topic in the nuclear area. The methodologies of uncertainties analysis have been developed by diverse institutions and they are broadly used at world level for their application in the results of the computer codes of the class of better estimation in the thermal hydraulics analysis and safety of plants and nuclear reactors. The main sources of uncertainty, types of uncertainty and aspects related with the models of better estimation and better estimation method are also presented. (Author)

  2. Project development: testing of heat exchange of cooling system and cleaning fuel pool of NPP Cofrentes; Desarrollo del proyecto Prueba de Intercambio Termico del Sistema de Enfriamiento y Limpieza de la Piscina de combustible (G41) de Central Nuclear de Cofrentes

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, B.; Vaquer, J. I.; Mota, M.; Reyes, S.; Palomo, M.; Ruiz, G.; Rebollo, C.

    2012-07-01

    Heat exchanger tests were carried out and data in the thermodynamic models developed, turned and can verify that the efficiency of heat exchange met the requirements. The work concluded complying at all times with the technical specifications and quality proposals by the Department of engineering at the Central Nuclear de Cofrentes.

  3. Regulatory activities related with the modification of the frequency of the programmed stoppings of the Argentine nuclear centrals; Actividades regulatorias relacionadas con la modficacion de la frecuencia de las paradas programadas de las centrales nucleares argentinas

    Energy Technology Data Exchange (ETDEWEB)

    Marino, E.; Calvo, J.; Waldman, R.; Navarro, R

    2006-07-01

    The mandatory character documentation of the Argentinean nuclear power stations in Embalse and Atucha I, required the realization of a programmed stoppings every twelve months to execute that settled down in the maintenance and surveillance programs for each installation. Nucleoelectrica Argentina S.A., in it character of Responsible Entity of the operation of these power stations, requested to the Argentinean Nuclear Regulatory Authority, in 2003 and 2005 respectively, the authorization to change the period of the repetitive tests and of the preventive maintenance of the systems related with the safety, to extend them from twelve to eighteen months. The mentioned applications were founded in economic aspects and in inclining to a decrease in the doses of the workers that perform in the activities that are carried out in the programmed stops. The adopted position by the Nuclear Regulatory Authority to decide on these applications was based on the result of diverse evaluations that included the use of the Probabilistic Analysis of Safety specific of each power station, the operative experience resultant of the execution of the preventive maintenance program, and of the results of the repetitive tests and of the inspections in service. The regulatory decisions were different in each case. Indeed, the Embalse nuclear power station was authorized by the Regulatory Authority to modify from twelve to eighteen months the period among the realization of the repetitive tests and of the preventive maintenance, conditioned to the execution of some specific regulatory requirements. On the other hand, the Atucha I nuclear power station was not authorized to modify this period. In this presentation that is detailed the acted by the Nuclear Regulatory Authority in both cases, the used analysis tools, and the foundation of the adopted decisions. (Author)

  4. Possibilities and limitations of analogue methods for studying the dynamics of nuclear power stations; Possibilites et limitations du calcul analogique pour les etudes dynamiques de centrales nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Caillet, C.; Deat, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    1. Introduction: the present paper is devoted to analog simulation of problems related to nuclear reactors other than the simulation of the kinetic equations which is well known. 2. Thermodynamic problems: various problems relative to temperature evolution in a reactor, in a pipe, in an exchanger, in a turbine, are studied, and simulation techniques used by earlier authors are critically reviewed. 3. Pipe simulators: it is shown that this problem can be solved by the use of specialized simulators which will be described and analysed. 4. Rotating machine simulators: the particular aspect of rotating machine calculations introducing frequent use of diagrams is emphasized. A simulator requiring both digital and analogue methods is described. 5. The study of a nuclear power station: as an example it is proposed to discuss problems a rising in connection with the preceding elements (a, b, c, d) when simulating the behaviour of large nuclear plants. The part played by ordinary computing elements for the simulation of the different servomechanism transfer functions is considered and process of regulation is outlined. 6. Conclusion: the necessity of the use of high quality simulators and computers is underlined and the accuracy of the solutions is discussed. (author)Fren. [French] 1. Cinetique des reacteurs: la simulation des equations cinetiques d'un reacteur nucleaire ne pose desormais plus de probleme. II est donc possible de faire le point des differentes applications de la technique analogique dans ce domaine. 2. Les problemes thermodynamiques: on discute les differents problemes poses par l'evolution des temperatures dans un reacteur, dans une tuyauterie, dans un echangeur, dans une turbine, et on passe en revue les techniques de simulation proposees jusqu'a ce jour. 3s simulateurs de tuyauteries: on montre comment les differents problemes poses ci-dessus peuvent etre resolus, pour une classe tres vaste de reacteurs par l'emploi de simulateurs

  5. Fukushima, two years later, modification requirements in nuclear power plants; Fukushima, dos anos despues, requerimientos de modificacion en centrales nucleares de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez J, J.; Camargo C, R.; Nunez C, A.; Mendoza F, J. E.; Salmeron V, J. A., E-mail: jerson.sanchez@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Jose Ma. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2013-10-15

    The occurred events in the nuclear power plant of Fukushima Daiichi as consequence of the strong earthquake of 9 grades in the Richter scale and the later tsunami with waves estimated in more than 14 meters high began a series of important questions about the safety of the nuclear power plants in operation and of the new designs. Firstly, have allowed to be questioned on the magnitudes and consequences of the extreme external natural events; that can put in risk the integrity of the safety barriers of a nuclear power plant when being presented in a multiple way. As consequence of the events of the Fukushima Daiichi NPP, the countries with NPPs in operation and /or construction carried out evaluations about their safety operation. They have also realized evaluations about accidents and their impact in the safety, analysis and studies too that have forced to the regulatory bodies to continue a systematic and methodical revision of their procedures and regulations, to identify the possible improvements to the safety in response to the events happened in Japan; everything has taken it to determine the necessity to incorporate additional requirements to the nuclear power plants to mitigate events Beyond the Design Base. Due to Mexico has the nuclear power plant of Laguna Verde, with two units of BWR-5 type with contention Mark III, some the modifications can be applicable to these units to administrate and/or to mitigate the consequences of the possible occurrence of an accident Beyond the Design Base and that could generate a severe accident. In this work an exposition is presented on the modification requirements to confront external natural events Beyond the Design Base, and its application in our country. (Author)

  6. Advance: research project on aging electrical wiring in nuclear power plants; Advance: proyecto de investigacion de envejecimiento en cableado electrico en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Cano, J. C.; Ruiz, S.

    2013-07-01

    As Nuclear Power Plants get older it is more important to know the real condition of low voltage, instrumentation, power and control cables. Additionally, as new plants are being built, the election of cables and the use of in-situ monitoring techniques to get reliable aging indicators, can be very useful during the plant life. The goal of this Project is to adapt, optimize and asses Condition Monitoring techniques for Nuclear Power Plants cables. These techniques, together with the appropriate acceptance criteria, would allow specialists to know the state of the cable over its entire length and estimate its residual life. In the Project, accelerated ageing is used in cables installed in European NPPs in order to evaluate different techniques to detect local and global ageing. Results are compared with accepted tests to validate its use for the estimation of cables residual life. This paper describes the main stages of the Project and some results. (Author)

  7. Establishment and evolution of Radiological Environmental Monitoring Programmes in nuclear power plants; Establecimiento y evolucion de los programas de vigilancia radiologica ambiental en las centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Marugan, I.; Luque, S.; Martin, J. L.; Rey, C.; Salas, R.; Sterling, A.; Ramos, L. M.

    2013-09-01

    This article presents a brief overview of how the Radiological Environmental Monitoring Programmes carried out around nuclear power plants have evolved associated to different reasons as the legal framework, operational phases of the facilities, development on the detection and measurement of low levels of radiation due to the state of art and best available technologies, changes within sites as well as in their surroundings and accident taken place inside and outside of our borders. (Author)

  8. Cleaning chemical and mechanical of heat exchangers in french nuclear plants; Limpieza mecanica y quimica de intercambiadores de calor en centrales nucleares francesas

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz, J. t.; Guerra, P.; Carreres, C.

    2013-03-01

    This project was carried out under the frame of the approval of LAINSA as a supplier of EDF in France. The inspection performed on systems called the moisture separator reheaters (GSS) of CPO series reactor of EDF nuclear power plants has shown evidence of significant clogging due to deposits of magnetite inside the tubes of tube bundle. The pressure drop between inlet and outlet of the heating was close to maximum design criterion. This effect could result in equipment damage and loss of plant productivity. The aim of the work was the design, development, approval and implementation of a procedure for un blocking the tubes of the GSS respecting the integrity of materials and ensuring the harmlessness of cleaning procedures. The procedure used was to completely remove magnetite deposits in order to recover a passage diameter and a surface finish equivalent to the origin, thus avoiding the replacement of the GSS and obtaining a considerable reduction of costs. The achieve these objectives we have developed a procedure that is basically a mechanical pre-cleaning of all tubes of the GSS in order to unblock tem, followed by a chemical cleaning where magnetite is dissolved and crawled out of the tube bundle. The main results were: -Corrosion less than 10 microns. 100-110 Kg of magnetite removed by heat exchanger. -Final pressure drop similar to that of new equipment. -Waste water: 70 m{sup 3} per exchanger, which were managed by an authorized waste management company. This procedure has been applied successfully in 14 GSS type heat exchangers in Fessenheim and Bugey nuclear power plants in France between 2009 and 2011. This project demonstrates that the long experience of LAINSA in the Spanish nuclear industry along with the knowledge and experience in chemical cleaning of SOLARCA, have served to successfully work demanding and mature markets such as the French nuclear market, solving the problem of deposits of magnetite with an effective and safe method for the treated

  9. Central Institute for Nuclear Research (1956 - 1979)

    International Nuclear Information System (INIS)

    The Central Institute for Nuclear Research (ZfK) of the Academy of Sciences of the GDR is presented. This first overall survey covers the development of the ZfK since 1956, the main research activities and results, a description of the departments responsible for the complex implementation of nuclear research, the social services for staff and the activities of different organizations in the largest central institute of the Academy of Sciences of the GDR. (author)

  10. Regulatory challenges in the management of aging of structural materials in nuclear power plants; Retos reguladores en la gestion del envejecimiento de los materiales estructurales de centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Castelo, C.; Mendoza, C.; Mas, E.; Conde, J. M.

    2013-07-01

    The article discusses two major pathways by which a regulatory body, and in particular the CSN, may participate in the acquisition of the necessary knowledge on mechanisms of aging of nuclear structural materials: to participate in forums to share operational experience and R and R project, both nationally and internationally. It notes the importance of this participation to carry out its regulatory function based on the knowledge acquired and the unique challenge of transferring that knowledge to rules and guidelines for their application. The article discusses various R and D projects in which the CSN participates directly. It calls for the presence of regulatory bodies in R and D project funded by the EU and the transfer of the results of such projects to codes, standards or guidelines for feasible implementation. (Author)

  11. Preparation of the Improved Technical Specifications of Nuclear Almaraz, Asco and Vandellos; Procedimiento de elaboracion de las Especificaciones Tecnicas Mejoradas de las Centrales de Almaraz Asco y Vandellos

    Energy Technology Data Exchange (ETDEWEB)

    Fuente, I.; Mirallas, F.; Garcia, M. D.

    2012-07-01

    In 2010 the Nuclear Almaraz, Asco and Vandellos agreed with the CSN start the transition project to the Improved Plant Technical Specifications (IPTSs), with reference the Rev. 3.1 of NUREG-1431. In April 2012 has been published the Rev. 4.0 of NUREG and have decided to adapt the IPTSs to the content of this new revision. The project for the three plants is developed in parallel, which allows to optimize the process.

  12. The Nuclear Safety Council's Instruction IS-30 on program requirements of fire protection at nuclear power plants; La instruccion IS-30 del consejo de Seguridad Nuclear sobre requisitos del programa de proteccion contraincendios en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Peco, J.

    2015-07-01

    The Nuclear Safety Councils Instrumentation IS-30 is the standard that establishes the fire protection program requirements for the Spanish nuclear power plants with operating license in order to satisfy the two fire protection objectives, which are the adoption of the defense-in-depth principle for fire protection and, by fire area confinement, to ensure that one train of components needed to achieve and maintain the safe shutdown conditions is free of fire damage, and that radioactive liberation is minimized. (Author)

  13. Central Bureau for Nuclear Measurements

    International Nuclear Information System (INIS)

    The main task of CBNM is defined as the specific programme Nuclear Measurements and Reference Materials. In the field of neutron data for standards, for fission and for fusion application, the nuclear charge distribution and odd-even effects for mass, charge and neutron number in the cold spontaneous fission of 252Cf were determined. X- and γ-ray emission probabilities were evaluated in the frame of an IAEA coordinated Research Project. The subthermal fission cross section measurements of 235U, 233U and 239Pu, were finalised. The dependence of the experimental weighting function of C6D6 detectors on thickness of several 56Fe samples was determined. Fusion data studies involved the development of a light-ion telescope with improved time - and energy resolution. Double differential cross-sections of 9Be were analysed. Radionuclide metrology dealt with the response of silicon detectors, as well as with the standardization of 192Ir sources. Project Reference Materials reports the EC Certification of nuclear reference materials 210 (PuO2), 523 (Al), 525 (Nb) and 526 (Nb). Progress was achieved in the preparation of dried solid spikes of uranium and plutonium for undiluted reprocessing input solution analysis. 10B and 6Li deposits were prepared for a redetermination of the neutron lifetime. Preliminary studies on speciation of trace metals in biological fluids were successful. Radioactive waste barrels were analysed by γ-scanning and blood samples were irradiated with 0.6 MeV neutrons. Exploratory research resulted in first measurements of transition radiation properties

  14. Follow-up of the results of the nuclear power plant stress tests and action plan.; Seguimiento de los resultados de las pruebas de resistencia de las centrales nucleares y plan de accion

    Energy Technology Data Exchange (ETDEWEB)

    Mellado Jimenez, I.

    2012-07-01

    The results of the stress tests carried out by the European nuclear power plants in the wake of the Fukushima Daiichi accident, subsequently subjected to peer reviews, have made it possible to identify the measures to be applied to improve safety. Action plans have been put in place to implement these measures within appropriate time frames. (Author)

  15. Development of database for spent fuel and special waste from the Spanish nuclear power plants; Desarrollo de la base de datos para el combustible gastado y residuos especiales de las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Gandal, R.; Rodriguez Gomez, M. A.; Serrano, G.; Lopez Alvarez, G.

    2013-07-01

    GNF Engineering is developing together with ENRESA and with the UNESA participation, the spent fuel and high activity radioactive waste data base of Spanish nuclear power plants. In the article is detailed how this strategic project essential to carry out the CTS (centralized temporary storage) future management and other project which could be emerged is being dealing with, This data base will serve as mechanics of relationship between ENRESA and Spanish NPPS, covering the expected necessary information to deal with mentioned future management of spent fuel and high activity radioactive waste. (Author)

  16. Nuclear energy options for Central Asia

    International Nuclear Information System (INIS)

    Full text: The five countries of Central Asia have a strong basis for the development of commercial nuclear energy. Several test reactors have operated within the region, including the Ak tau BN350 - a very advanced fast breeder reactor combined with a large water desalination plant. The Central Asian countries have a large cadre of well-trained nuclear scientists and engineers who could operate and maintain nuclear power plants and expanded nuclear fuel infrastructure as they evolve. The Central Asia region experiences significant demand for base-load energy in major population centers and industrial development areas. A well-developed electricity transmission grid could transmit nuclear-generated electricity from the power stations to the load centers. Finally, given the large land area and the relatively small population (in relation to the size of the region) there exist many remote and stable sites where nuclear generation centers can be sited and connected to the transmission grid. A good example is the Semipalatinsk Nuclear Test Site (STS) whose vast area could easily contain several nuclear power plants, which would be cooled by the water flow of the Irtish River. The Kazakhstan authorities have already identified several potential nuclear power plant sites within the national transmission system, the STS being one such prospective site. The large-scale availability of uranium in the region affords the uranium exporting countries - particularly Kazakhstan and Uzbekistan - significant leverage with international nuclear reactor vendors in establishing the terms for nuclear plant imports into the region. Such leverage could further be increased if multiple reactor orders are submitted, for instance by two or more countries ordering similar types of plants to be installed at various sites in their territories. The added value of the uranium exports from Central Asia does not have to be measured only in terms of supporting the development of fuel cycle

  17. Update of foundation design modifications of data cables and piping in nuclear power plants in operation; Actualizacion de modificaciones de sieno de bases de datos de cables y conducciones en centrales nucleares en operacion

    Energy Technology Data Exchange (ETDEWEB)

    Perez Pereira, J.

    2013-07-01

    The scope of this application is the manage the life cycle of cables electrical and pipes of cables in Trillo NPP. The application is integrated in a configuration Control system, so both cables and conduits become elements of configuration and management of life and history associated with the of the relevant modifying documents. The guarantees criteria of physical separation of wires for jobs and for independent networks designed according to the redundancy of the Central System.

  18. Implementation of the monitoring Plan of the State and behavior of the systems in the Central Nuclear Almaraz; Implantacion del Plan de Seguimiento del Estado y Comportamiento de Sistemas en la Central Nuclear Almaraz

    Energy Technology Data Exchange (ETDEWEB)

    Montero Puertas, I.; Gonzalez Redondo, R.; Lopez Pozo, A.

    2013-07-01

    This work aims to present the implementation process of the Monitoring of the State and behavior of the systems in the Nuclear plan Almaraz. Will define the scope, process, frequencies and criteria of evaluation of the State and behavior of the systems included in the Plan of reliability, as well as the documentary requirements of this evaluation. Cases will also be collected practical real phenomena detected during monitoring degradation made and will explain the actions taken prior to the failure.

  19. Fuel cycle management by the electric enterprises and spanish nuclear Power plants; Gestion del ciclo de combustible por las empresas electricas y centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Celma, E. M.; Gonzalez, C.; Lopez, J. V.; Melara, J.; Lopez, L.; Martinez, J. C.; Culbras, F.; Blanco, J.; Francia, L.

    2015-07-01

    The Nuclear Fuel Group reports to the Technology Committee of the UNESA Nuclear Energy Committee, and is constituted by representatives of both the Spanish Utilities and the Nuclear Power Plants. The Group addresses the nuclear plant common issues in relation to the operation and management of the nuclear fuel in their different stages of the Fuel Cycle. The article reviews the activities developed by the Group in the Front-End, mainly in the monitoring of international programs that define criteria to improve the Fuel Reliability and in the establishment of common bases for the implementation of changes in the regulation applying the nuclear fuel. Concerning the Back-End the Group focuses on those activities of coordination with third parties related to the management of used fuel. (Author)

  20. Evaluation of fatigue damage in nuclear power plants: evolution and new tools of analysis; Evaluacion del dano a fatiga en centrales nucleares: evolucion y nuevas herramientas de analisis

    Energy Technology Data Exchange (ETDEWEB)

    Cicero, R.; Corchon, F.

    2011-07-01

    This paper presents new fatigue mechanisms requiring analysis, tools developed for evaluation and the latest trends and studies that are currently working in the nuclear field, and allow proper management referring facilities the said degradation mechanism.

  1. Exploitation of the nuclear plant Asco and the benthic community of the river Ebro; Explotacion de la central nuclear Asco y la comunidad bentonica del rio Ebro

    Energy Technology Data Exchange (ETDEWEB)

    Esparza Martin

    2015-07-01

    The Ebro river passing through the town of Asco in the province of Tarragona, provides the necessary water for the operation of the nuclear plant. water of circulation flows and service components are returned completely to the river, or if operation of cooling towers, decreased in a small part. Evaporative losses account for approximately 1% of the total flow used for two nuclear groups. (Author)

  2. IGALL, key factor in long-term operation of nuclear power plants; IGALL, factor clae en la operacion a largo plazo de centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Calatayud, M. A.; Sainero, J.

    2014-10-01

    The ageing management is a key factor during the Long Term Operation of Nuclear Power Plants and also during the licensed period; IGALL is an international accepted reference guide that shows how the manage it. The knowledge of the reasons to develop this project, how the results have been reached and the public access to them for future use of the Nuclear Power Plants, are the purpose of this article. (Author)

  3. Practical training in the operation of nuclear power plants with Interactive Graphic Simulator of Zorita; Formacion practica en la operacion de centrales nucleares con el Simulador Grafico Interactivo de Zorita

    Energy Technology Data Exchange (ETDEWEB)

    Cuervo, D.; Garcia-Herranz, N.; Garcia, S.; Davila, R.; Ahnert, C.; Aragones, J. M.; Cabellos, O.; Gallego, E.; Lorente, A.; Minguez, E.; Rebollo, L.; Blanco, J.

    2010-07-01

    In April 2008 a collaboration agreement was signed between Gas Natural Union Fenosa and the Universad Politecnica de Madrid for the creation of the Aula Jose Cabrera dedicated to train professionals in the field of nuclear technology. The Classroom located in the Department of Nuclear Engineering, has been equipped with the Interactive Graphic Simulator of Zorita (SGIZ). The use of the simulator intended to improve the quality of teaching in the area of Nuclear Engineering. It integrates in the teachings of Industrial Engineering degree and the Master of Nuclear Science and Technology. Different manuals are under preparation to make it a suitable tool for teaching purpose. These manuals will guide the student so that learning takes place both through the guidance of the teacher as independently. (Author) 3 refs.

  4. Nuclear Safety in Central and Eastern Europe

    International Nuclear Information System (INIS)

    Nuclear safety is one of the critical issues with respect to the enlargement of the European Union towards the countries of Central and Eastern Europe. In the context of the enlargement process, the European Commission overall strategy on nuclear safety matters has been to bring the general standard of nuclear safety in the pre-accession countries up to a level that would be comparable to the safety levels in the countries of the European Union. In this context, the primary objective of the project was to develop a common format and general guidance for the evaluation of the current nuclear safety status in countries that operate commercial nuclear power plants. Therefore, one of the project team first undertakings was to develop an approach that would allow for a consistent and comprehensive overview of the nuclear safety status in the CEEC, enabling an equal treatment of the countries to be evaluated. Such an approach, which did not exist, should also ensure identification of the most important safety issues of the individual nuclear power plants. The efforts resulted in the development of the ''Performance Evaluation Guide'', which focuses on important nuclear safety issues such as plant design and operation, the practice of performing safety assessments, and nuclear legislation and regulation, in particular the role of the national regulatory body. Another important aspect of the project was the validation of the Performance Evaluation Guide (PEG) by performing a preliminary evaluation of nuclear safety in the CEEC, namely in Bulgaria, Czech Republic, Hungary, Lithuania, Romania, Slovak Republic, and Slovenia. The nuclear safety evaluation of each country was performed as a desktop exercise, using solely available documents that had been prepared by various Western institutions and the countries themselves. Therefore, the evaluation is only of a preliminary nature. The project did not intend to re-assess nuclear safety, but to focus on a comprehensive summary

  5. Monitoring systems online of oil for transformers of nuclear power plants; Sistemas de monitorizacion online del aceite para transformadores de potencia de Centrales

    Energy Technology Data Exchange (ETDEWEB)

    Sarandeses, S.

    2014-07-01

    The nuclear power plants are showing their concern due to the existence of recent failures related to the bulky transformers of power. These transformers are not security, but are important for the production of power as its failure can cause transient on the floor, reactor scram or shooting, that can cause interruptions in the production of energy or might force us to reduce the power of production The analysis of gases dissolved in transformer oil is recognized as a trial key to identify a submerged transformer failure in oil. With this analysis it is not possible to ensure that there is no damage in the transformer, but the probability of risk of this type of failure can be reduced. The industry recommended to equip the new large power transformers with oil online monitoring systems and in some cases also be It recommended its use in existing transformers. (Author)

  6. Modernization of the turbo in the Laguna Verde Nuclear Power Plant; Modernizacion del turbogrupo en la Central Nuclear de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Liebana, B.; Merino, A.; Cobos, A.; Gonzalez, J. J.

    2010-07-01

    The power increase of the Laguna Verde Nuclear Power Plant is a project for the rehabilitation and modernization of the turbo and associated equipment to get an increase of its power and of its service life. The project scope includes the design, the engineering, the equipment supply, the installation, the testing and the commissioning. This paper describes the first phase of the project.

  7. The determinist nature of the annalist of accidents at nuclear power plants; El caracter determinista del analisis de accidentes en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Pelayo, F.; Mendizabal, R.

    2005-07-01

    This article develops the concept of determinist approximation or method to the analysis of accidents at nuclear facilities and explains how the aim was fulfilled with respect to the protection of workers at these facilities and the public in general. (Author) 11 refs.

  8. Control rod cluster drop time anomaly Guandong nuclear power station (Daya bay) and Electricite de France nuclear power stations (1450 MWe N4 Series); Anomalie de temps de chute des grappes de controle centrale de guang dong (daya bay) et centrales d`electricite de France (Palier N4-1450 MWE)

    Energy Technology Data Exchange (ETDEWEB)

    Olivera, J.J.; Naury, S.; Tricot, N.; Tran Dai, P.; Gama, J.M.

    1996-12-31

    The anomaly of control rod cluster drop time revealed at Guandong Nuclear Power Station in Daya Bay and in the Chooz B1 pilot unit for the N4 series, led to the replacement of the M1 type control rod cluster guide tubes with 1300 MWe PWR type guide tubes, adapted to the geometry of the Guandong reactors and the 1450 MWe reactors of the N4 series. The comparison of the drop times obtained with the 1300 MWe type control rod cluster guide 1300 MWe type control rod cluster guide tubes gave satisfactory results. These met the safety criterion for N4 series control rod cluster drop times (2.15 under hot shutdown conditions). The drop time tests which will be carried out in middle of and at the end of cycle 1 of Chooz B1 should make it possible to finally validate the solution already successfully implemented at Guandong. However, this anomaly has revealed the limits of representativeness of the experimental test loops with regard to the real reactor configuration. In view of this, it has been deemed necessary to ask Electricite de France to pursue its analysis both on the understanding of the phenomena which led to this anomaly and on the limits of the representativeness of the experimental test loops. (authors).

  9. New technologies of information treatment in the ERP of the Almaraz and Trillo nuclear power plants; Nuevas tecnologias de tratamiento de la informacion en el ERP de las centrales nucleares de Almaraz y Trillo

    Energy Technology Data Exchange (ETDEWEB)

    Martin Lopez-Suevos, C.; Gonzalez Crego, E.

    2013-03-01

    The Almaraz and Trillo Nuclear Power Plants are equipped with an Integrated Operation Management System (SIGE), which covers practically all of their transactional and management needs in all areas, with the exception of some specific engineering and simulation tools. In recent years, applications based on new computer technologies have been developed and integrated into the SIGE, including a Maintenance Dashboard, an Admissions Office ant the use of bar code readers, all of which are described in this article. (Author)

  10. What they have in common the engineering from the Spanish nuclear power plants?; Que tienen en comun las ingenierias de las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Mendez, M.

    2012-11-01

    In recent years, Spain Nuclear Power Plant Engineering have switched their project/task management method to Critical Chain multi-project management, developed by Dr. Goldratt, achieving outstanding results in improving quality and productivity. Multitasking reduction, task and resource synchronizing without the need of exact schedules, implementing a real-time priority information system, relying on the software Concerto, and daily decision making are the basis for the management change that has generated productivity increases of between 20% to 50%, opening new horizons for improvement in other scenarios such as optimizing refueling shutdowns. (Author)

  11. Modification and updating of documentation in equipment of panels of control room in nuclear power plant operation; Modificacion y actualizacion de documentacion en aparatos de paneles de sala de control en una central nuclear en operacion

    Energy Technology Data Exchange (ETDEWEB)

    Agudo Montero, L.

    2013-07-01

    The present paper describes a case very unique specific design of interactive 2D-CAD application, that has been developed by Empresarios Agrupados as engineering support to the nuclear power plants, aware of the problem that exists with the documentation of the instruments and devices that are on the panels of Control room, and that only have the documentation generated in its day by the manufacturers of these panels. To this end, an application (application DOPAB) has been developed to help solve the problem of management, design and modification of wiring and wiring devices existing in the Control room control panels.

  12. Centralized vs. De-centralized Multinationals and Taxes

    DEFF Research Database (Denmark)

    Nielsen, Søren Bo; Raimondos-Møller, Pascalis; Schjelderup, Guttorm

    2005-01-01

    The paper examines how country tax differences affect a multinational enterprise's choice to centralize or de-centralize its decision structure. Within a simple model that emphasizes the multiple conflicting roles of transfer prices in MNEs - here, as a strategic pre-commitment device and a tax m...... manipulation instrument -, we show that (de-)centralized decisions are more profitable when tax differentials are (small) large.Keywords: Centralized vs. de-centralized decisions, taxes, MNEs.JEL-Classification: H25, F23, L23....

  13. Sampling and description of the resins stockpiles in the Kozloduy Nuclear Power Plant large tanks; Muestreo y caracterizacion de resinas almacenadas en tanques de grandes dimensiones de la Central Nuclear de Kozloduy (Bulgaria)

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Fernandez, L.; Gonzalez Gandal, R.; Herrera, J. A.

    2012-11-01

    The consortium ENSA-Gas Natural Fenosa Engineering has a contract with Kozloduy Nuclear Power Plant (KNPP) for the retrieval and conditioning of the resins, which were generated during the operation of the plant. The project deals with resins characterization for which its necessary to define a proper methodology that fulfills the Bulgarian authorities requirements. Also, it will be included the design, fabrication, supply and installation of the required equipment to carry out the sampling and measurements of the resins, updating the facilities and the specific training of the personnel in order to perform by themselves every activities. This article reflects how the consortium will deal with the management of this damaging project, which involves a wide range of activities, including the management of each implicated are of both KNPP and external organizations. (Author)

  14. Cycle for fuel elements. Uranium production, programs for nuclear power stations and capital expenditure involved; Cycles de combustibles. Production d'uranium, programme de centrales electriques et effort financier correspondant

    Energy Technology Data Exchange (ETDEWEB)

    Andriot, J.; Gaussens, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    A number of different possible programs for nuclear power stations of various types are presented in this survey. These programs are established in relation to the use of uranium and thorium in amounts similar to those that shall probably be produced in France during the next fifteen years. As it is possible to draw plans for nuclear power stations in which several processes exist simultaneously, an unlimited number of variations being thinkable, this survey is limited to successive analysis of the results obtained by use of only one of each of the following three systems: - system natural uranium-graphite, - system natural uranium-heavy water, -system enriched uranium-pressurised light water. All schemes are considered as assemblages of these three simple systems. The effects of plutonium recycling are also considered for each system. The electric power installed and the capacity of stations situated up-stream and down-stream have been calculated by this method and an attempt has been made to establish the sum to be invested during the fifteen years necessary for the launching of the programs scheduled. A table of timing for the investments groups the results obtained. Considering the fact that French availabilities in capital shall not be unlimited during the coming years, this way of presenting the results seems to be interesting. (author)Fren. [French] L'etude presentee comporte l'examen d'un certain nombre d'hypotheses de programmes de centrales nucleaires de types differents. Ces programmes correspondent a l'utilisation de tonnages d'uranium et de thorium de l'ordre de grandeur de ceux qui seront probablement produits par la France dans les quinze prochaines annees. Comme il est possible de batir un programme de centrales nucleaires, comportant a la fois plusieurs filieres suivant des variantes en nombre infini, on s'est contente d'examiner successivement les resultats ous si on utilisait exclusivement l

  15. La central electronuclear de Garellano (Italia

    Directory of Open Access Journals (Sweden)

    Morandi, Riccardo

    1965-11-01

    Full Text Available This power station works on the forced circulation, double cycle process. It has a turboalternator of 160,000 kw, and is situated 7 km above the mouth of the river Garellano. The most significant feature of this type of building is the spherical container, within which the reactor is located. The connection between this and the turboalternator hall is also of interest. In addition there is a complex set of other facilities, including the engine hall, workshop, laboratories, offices and stores. Great care has been lavished on the reinforced concrete structure, and on the plastic quality of the whole building, taking care that it fits within the general environment. The need to have the use of a powerful bridge crane, and provide protection against radiation, has involved the construction of reinforced concrete of very large sections, in contrast to the more conventional type of structures. The external paraments are of untreated concrete, with abutments. Administration and executive office buildings are of conventional design.Esta central, de doble ciclo y circulación forzada, dispone de un grupo turboalternador de 160.000 kW. Ha sido construida a unos 7 km aguas arriba de la desembocadura del río Garellano. Lo más característico de este tipo de estructuras industriales es el recipiente esférico, en cuyo interior se halla instalado el reactor y la comunicación entre éste y la sala del turboalternador. El complejo consta de servicios diversos: salas de máquinas, talleres, laboratorios y oficinas, por cuya razón se ha estudiado con esmero no solamente la estructura de hormigón armado, sino el aspecto plástico y estético de todo el edificio, en armonía con el paisaje que lo rodea. La necesidad de disponer de un puente- grúa de gran capacidad y la protección debida contra las radiaciones, han originado secciones poco corrientes en la estructura de hormigón armado, siendo ésta su característica diferencial con respecto a las

  16. Analysis of a natural draught tower in the circulation seawater system of nuclear power plant of Laguna Verde; Analisis de una torre de tiro natural en el sistema de agua de circulacion de mar de la central nucleoelectrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Tijerina S, F.; Vargas A, A. [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Subgerencia de Ingenieria, Carretera Veracruz-Medellin Km. 7.5, Veracruz (Mexico)], e-mail: francisco.tijerina@cfe.gob.mx

    2009-10-15

    The analysis of a natural draught tower in open circuit for the cooling system of seawater circulation on the nuclear power plant of Laguna Verde, it is based on conditions of 2027 MWt and 2317 MWt, where the flows of circulation water system hardly vary and whose purpose will be, to cool the seawater circulation. The circulation water system is used as heat drain in main condenser of turbo generator to condense the nuclear vapor. The annual average temperature in the seawater at present is of 26 C to the entrance to circulation water system and it is vary in accordance with the time of year. The mean temperature of leaving of circulation water system to the sea is of 41 C. Having a cooling tower to reduce the entrance temperature to the circulation water system, it improves the efficiency of thermal transfer in condenser, it improves the vacuum in condenser giving more operative margin to avoid condenser losses by air entrances and nuclear power plant shutdowns, as well as for to improve the efficiency of operative balance of nuclear power plant, also it prevents the impact in thermal transfer efficiency in condenser by the climatic change. (Author)

  17. Towards Quantum Transport for Central Nuclear Reactions

    CERN Document Server

    Danielewicz, Pawel; Barker, Brent

    2016-01-01

    Nonequilibrium Green's functions represent a promising tool for describing central nuclear reactions. Even at the single-particle level, though, the Green's functions contain more information that computers may handle in the foreseeable future. In this study, we explore slab collisions in one dimension, first in the mean field approximation and demonstrate that only function elements close to the diagonal in arguments are relevant, in practice, for the reaction calculations. This bodes well for the application of the Green's functions to the reactions. Moreover we demonstrate that an initial state for a reaction calculation may be generated through adiabatic transformation of interactions. Finally, we report on our progress in incorporating correlations into the dynamic calculations.

  18. Technological evaluation for the extension of the operation license to the nuclear power plant of Laguna Verde; Evaluacion tecnologica para la extension de la licencia de operacion de la Central Nucleoelectrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Arganis J, C. R.; Medina A, A. L., E-mail: carlos.arganis@inin.gob.m [ININ, Departamento de Tecnologia de Materiales, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2010-07-01

    At the present time one of the tendencies in the nuclear industry is the renovation of operation licenses of the nuclear power plants, with the purpose of prolonging their operation 20 years more than the time settled down in their original license, which is of 30 years for the case of the nuclear power plant of Laguna Verde. This allows the electric power generation for a major period of time and to a relatively low price, giving this way a bigger competitiveness to the power stations of nuclear power. However, to request the license extension of the nuclear power plant requires to get ready the documentation and necessary studies for: to maintain a high level of security, to optimize the operation, maintenance and service life of the structures, systems and components, to maintain an acceptable level of performance, to maximize the recovery of the investment about the service of the nuclear power plant and to preserve the sure conditions for a major operation period at the license time. This paper describes the studies conducted by the Materials Technology Department of the Instituto Nacional de Investigaciones Nucleares (ININ) to substantiate the required documentation for obtaining the extension of operating license of the nuclear power plant. These studies are focused mainly in the reactor pressure vessels of both units, as well as in the deposit of noble metals and the influence of the sludges (crud s) in this deposit. (Author)

  19. The continuous improvement system of nuclear power plant of Laguna Verde; El sistema de mejora continua de la central nucleoelectrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Rivera C, A. [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Km. 42.5 Cardel-Nautla, Veracruz (Mexico)], e-mail: arr99999@cfe.gob.mx

    2009-10-15

    This paper describes the continuous improvement system of nuclear power plant of Laguna Verde and the achievements in implementing the same and additionally two study cases are presents. In February 2009 is noteworthy because the World Association of Nuclear Operators we identified as a learning organization, qualification which shows that the continuous improvement system has matured, and this system will expose as I get to learn to capitalize on our own experiences and external experiences diffused by the nuclear industry. In 2007 the management of nuclear power plants integrates its improvement systems and calls it continuous improvement system and is presented in the same extensive report that won the National Quality Award. This system is made up of 5 subsystems operating individually and are also related 1) human performance; 2) referential comparison or benchmarking; 3) self-assessment; 4) corrective action and 5) external operating experience. Five subsystems that plan, generate, capture, manage, communicate and protect the knowledge generated during the processes execution of nuclear power plant of Laguna Verde, as well as from external sources. The target set in 2007 was to increase the intellectual capital to always give response to meeting the security requirements, but creating a higher value to quality, customer, environment protection and society. In brief each of them, highlighting the objective, expectations management, implementation and some benefits. At the end they will describe two study cases selected to illustrate these cases as the organization learns by their continuous improvement system. (Author)

  20. Aplicación de la metodología ISA al análisis de la secuencia de pérdida del sistema de agua de refrigeración de componentes en una central nuclear con reactor de agua a presión

    OpenAIRE

    Ibáñez Hurtado, Luisa

    2015-01-01

    La metodología Integrated Safety Analysis (ISA), desarrollada en el área de Modelación y Simulación (MOSI) del Consejo de Seguridad Nuclear (CSN), es un método de Análisis Integrado de Seguridad que está siendo evaluado y analizado mediante diversas aplicaciones impulsadas por el CSN; el análisis integrado de seguridad, combina las técnicas evolucionadas de los análisis de seguridad al uso: deterministas y probabilistas. Se considera adecuado para sustentar la Regulación Informada por el Ries...

  1. Determination of alpha emitters by biphasic liquid scintillation in samples of smear from a nuclear power plant in dismantling; Determinacion de emisores Alfa por centelleo liquido bifasico en muestras de Frotis procedentes de una central nuclear en desmantelamiento

    Energy Technology Data Exchange (ETDEWEB)

    Lara Robustillo, E.; Rodriguez Alcala, M.

    2012-07-01

    The object of this work has been to develop a procedure that allows to determine the radioactive concentration of Am+Cm and Pu by biphasic liquid scintillation. The process has been applied in swab specimens from a pool of a nuclear power station in dismantling. To carry out this process, have dissolved samples by microwave-assisted acid digestion.

  2. Life time of nuclear power plants and new types of reactors; La duree de vie des centrales nucleaires et les nouveaux types de reacteurs

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-05-01

    This report, realized by the Evaluation Parliamentary Office of scientific and technological choices, aims to answer simple but fundamental questions for the french electric power production. What are the phenomena which may limit the exploitation time of nuclear power plants? How can we fight against the aging, at which cost and with which safety? The first chapter presents the management of the nuclear power plants life time, an essential element of the park optimization but not a sufficient element. The second chapter details the EPR and the other reactors for 2015 as a bond between the today and tomorrow parks. The last chapter deals with the necessity of efforts in the research and development to succeed in 2035 and presents other reactors in project. (A.L.B.)

  3. Implementation of the project of equipment reliability in the nuclear power plant of Laguna Verde; Implementacion del proyecto de confiabilidad de equipo en la Central Nucleoelectrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Rios O, J. E.; Martinez L, A. G. [CFE, Central Laguna Verde, Subgerencia General de Operacion, Veracruz (Mexico)]. e-mail: jrios@cfe.gob.mx

    2008-07-01

    A equipment is reliable if it fulfills the function for which was designed and when it is required. To implement a project of reliability in a nuclear power plant this associate to a process of continuous analysis of the operation, of the conditions and faults of the equipment. The analysis of the operation of a system, of the equipment of the same faults and the parts that integrate to equipment take to identify the potential causes of faults. The predictive analysis on components and equipment allow to rectify and to establish guides to optimize the maintenance and to guarantee the reliability and function of the same ones. The reliability in the equipment is without place to doubts a wide project that embraces from the more small component of the equipment going by the proof of the parts of reserve, the operation conditions until the operative techniques of analysis. Without place of doubt for a nuclear power plant the taking of decisions based on the reliability of their systems and equipment will be the appropriate for to assure the operation and reliability of the same one. In this work would appear the project of reliability its processes, criteria, indicators action of improvement and the interaction of the different disciplines from the Nuclear Power Plant of Laguna Verde like a fundamental point for it put in operation. (Author)

  4. Whole study of nuclear matter collective motion in central collisions of heavy ions of the FOPI detector; Etude complete du mouvement collectif de la matiere nucleaire dans les collisions centrales d'ions lourds avec le detecteur FOPI

    Energy Technology Data Exchange (ETDEWEB)

    Bendarag, A

    1999-07-09

    In this work we study the collective phenomena in the central collisions of heavy ions for the Au + Au, Xe + CsI and Ni + Ni systems at incident energies from 150 to 400 MeV/nucleon with the data of the FOPI detector. In order to describe completely the flow of the nuclear matter, we fit the double differential momentum distributions with two-dimensional Gaussian. We study the characteristic parameters of the collective flow (flow range, aspect ratios, flow parameter) versus the charge and the mass of the fragments as well as the incident energy and the centrality of the collisions. The transverse energy is used for selecting the central collisions. The method of the Gaussian fits requires also to reconstruct the reaction plane of the event. Then we correct the parameters for the finite number of particles effects and account for the influence of the acceptance of the detector. We confirm the importance of the thermal motion for the light charge or mass fragments and, conversely, the predominance of the collective motion for the heavy fragments. A common flow angle for all the types of particles is highlighted for the first time, demonstrating the power of the method of the Gaussian fits; The evolution of the other parameters confirms the observations done with other methods of flow analysis. These results should contribute to put constraints on the collision models and to enlarge our knowledge of the properties of the nuclear matter. (author)

  5. Regulator process for the authorization of an amendment to the operation license of a nuclear power plant in Mexico; Proceso regulador para la autorizacion de una enmienda a la licencia de operacion de una central nuclear en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Perez, R.; Espinosa V, J.M.; Salgado, J.R.; Mamani, Y.R. [CNSNS, Dr. Barragan 779, Col. Narvarte, 03020 Mexico D.F. (Mexico)

    2005-07-01

    The regulator process by which an authorization is granted from an amendment to the License of Operation of a nuclear power station in Mexico is described. It makes an appointment the effective legal mark, the technical characteristics of the modification, the evaluation process and deposition upon oath of tests and finally the elaboration of the Safety report and the Technical Verdict that is a correspondent for the regulator organism to the Secretary of Energy, the one that in turn is the responsible of granting the amendment the License just as it establishes it the Law. (Author)

  6. Central Argentina de Elementos Modulares (CAREM)

    International Nuclear Information System (INIS)

    CAREM (Central ARgentina de Elementos Modulares) is an Argentine project to develop, design and construct an innovative, simple and small nuclear power plant (NPP). This plant has an indirect cycle reactor with distinctive and characteristic features that greatly simplify the design and contribute to a high safety level. Some of the high-level design characteristics of the plant are: an integrated primary cooling system; self-pressurized primary system and safety systems relying on passive features. CAREM is a CNEA (Comision Nacional de Energia Atomica) project, which has been jointly developed with INVAP, an Argentine company. The CAREM concept was first presented in March 1984, in Lima, Peru, during the IAEA's conference on small and medium sized reactors. Chronologically CAREM was one of the first of the present new generation of reactor designs. The first step of this project is the construction of the prototype of about 27 MW(e) (CAREM-25). This project allows Argentina to sustain activities in nuclear power plant design, assuring the availability of updated technology in the mid-term. The design basis is supported by the cumulative experience acquired in research reactor design, construction and operation and pressurized heavy water reactor (PHWR) operation, as well as development of advanced design solutions. The Generation IV International Forum (GIF) recognized CAREM as an international near term deployment (INTD) reactor

  7. Fourth Regional Meeting: Nuclear Energy in Central Europe, Proceedings

    International Nuclear Information System (INIS)

    Fourth Regional Meeting for Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 89 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region. Topics are: Research Reactors, Reactor Physics, Probabilistic Safety Assessment, Severe Accidents, Ageing and Integrity, Thermal Hydraulics, NPP Operation Experiance, Radioactive Waste Management, Environment and Other Aspects, Public and Nuclear Energy, SG Replacement and Plant Uprating.

  8. Communication and surrounding of Asco and Vandellos II nuclear power plants; La comunicacion y el entorno de las centrales de Asco y Vandellos II

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    The Asco and Vandellos-II power plants have always been integrated into the regions where they are located, and they take an active part in the development of surrounding towns through quality employment provided by our facilities, social and cultural support and aid to development promoted by regional councils. Communication to media is a corporate priority defined in our strategic plant, to ensure openness, rigour and punctuality. We also attend to the visitors who want to learn more about our facilities in the visitor center, and we have agreements with agrarian institutions in the area so that students can de practical training in the farms we own for agricultural production. (Author)

  9. Nuclear Power in South-Central Brazil

    International Nuclear Information System (INIS)

    The region of South-Central Brazil includes the states of Sao Paulo, Rio de Janeiro, Guanabara and Minas Gerais. The most recent power study was made by Canambra Engineering Consultants Limited. This group reported that the public-grid electricity output for the area in 1962 was 2.16 GW (average generation), with an installed capacity of 3.41 GW and annual mean load factor of 63.4; an increase in power requirements for 1970 was forecast, corresponding to an average output of 5.37 GW and an installed capacity of 8.3 GW. This forecast was based on an annual growth rate of 11.9% in generation. ''The energy requirements have grown at an average annual rate of 10.9% since 1955; however, the present forecast is based on the assumption of power being available as required, and hence includes the suppressed demand resulting from existing restrictions in generating and distribution capacity''

  10. Projects of Modifications of design for mitigation of accidents outside the design Bases on nuclear Central PWR Siemens-KWU and Westinghouse; Proyectos de Modificaciones de Sieno para Mitigacion de Accidentes fuera de la Bases de Diseno en Centrales Nucleares PWR Siemens-KWU y Westinghouse

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez Gonzalez, G.; Cano Rodriguez, L. A.; Arguello Tara, A.

    2014-07-01

    Following the accident at the Japanese Fukushima-Daiichi NPP, the different regulators of nuclear power generation have required numerous reports regarding the evaluation and modification of the capacity of the plants to face accidents with severities beyond that established in their Design Bases. Under this new scenario, with multiple new demands and commitments, EA has carried out the required works for the implementation of strategies to mitigate the consequences of beyond Design Basis accidents for utilities owning Siemens-KWU and Westinghouse PWR nuclear power plants. (Author)

  11. Economic analysis of extended cycles in the Laguna Verde nuclear power plant; Analisis economico de ciclos de extendidos en la Central Nucleoelectrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez N, H.; Hernandez M, J.L.; Francois L, J.L. [Facultad de Ingenieria, UNAM, 04510 Mexico D.F. (Mexico)]. E-mail: hermilo@correo.unam.mx

    2004-07-01

    The present work presents a preliminary analysis of economic type of extended cycles of operation of the Unit One in the Laguna Verde nuclear power plant. It is analysed an equilibrium cycle of 18 months firstly, with base to the Plan of Use of Energy of the Federal Commission of Electricity, being evaluated the cost of the energy until the end of the useful life of the plant. Later on an alternative recharge scenario is presented with base to an equilibrium cycle of 24 months, implemented to the beginning of the cycle 11, without considering transition cycles. It is added in both cycles the cost of the substitution energy, considering the unitary cost of the fuel of a dual thermoelectric power station of 350 M We and evaluating in each operation cycle, in both scenarios, the value of the substitution energy. The results show that a reduction of the days of recharge in the cycle of 24 months could make this option but favorable economically. The duration of the period of recharge rebounds in considerable grade in the cost of energy generation for concept of fuel. (Author)

  12. Central Institute of Nuclear Research Rossendorf 25 years old

    International Nuclear Information System (INIS)

    A colloquium dedicated the 25th anniversary of the foundation of the Central Institute for Nuclear Research of the GDR Academy of Sciences was held on January, 21st, '81. 13 papers were given which dealt with aspects of the institute's history as well as with modern trends in nuclear and solid state physics, nuclear energy and chemistry, radioisotope production, radiation protection and nuclear information. (author)

  13. La problemática de la energía nuclear en el Valle de Ayora. Los conflictos en torno a la prolongación del funcionamiento de la central de Cofrentes y a la candidatura de Zarra como posible ubicación del almacén temporal centralizado de residuos de alta actividad

    OpenAIRE

    Garcia Garcia, Josep Ernest

    2011-01-01

    Se analiza la fase reciente (2009-2011) del conflicto en la sociedad valenciana en torno a los usos industria les de la energía nuclear de fisión , con especial atención a sus expresiones locales en el Valle de Ayora. En la investigación se ha recurrido a entrevistas abiertas en profundidad, análisis documental y, en menor medida, observación participante . Se han estudiado especialmente tres aspectos: el papel de la información científico-técnica en el surgimiento y desarrollo...

  14. Internal event analysis for Laguna Verde Unit 1 Nuclear Power Plant. Accident sequence quantification and results; Analisis de eventos internos para la Unidad 1 de la Central Nucleoelectrica de Laguna Verde. Cuantificacion de secuencias de accidente y resultados

    Energy Technology Data Exchange (ETDEWEB)

    Huerta B, A.; Aguilar T, O.; Nunez C, A.; Lopez M, R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, 03000 Mexico D.F. (Mexico)

    1994-07-01

    The Level 1 results of Laguna Verde Nuclear Power Plant PRA are presented in the {sup I}nternal Event Analysis for Laguna Verde Unit 1 Nuclear Power Plant, CNSNS-TR 004, in five volumes. The reports are organized as follows: CNSNS-TR 004 Volume 1: Introduction and Methodology. CNSNS-TR4 Volume 2: Initiating Event and Accident Sequences. CNSNS-TR 004 Volume 3: System Analysis. CNSNS-TR 004 Volume 4: Accident Sequence Quantification and Results. CNSNS-TR 005 Volume 5: Appendices A, B and C. This volume presents the development of the dependent failure analysis, the treatment of the support system dependencies, the identification of the shared-components dependencies, and the treatment of the common cause failure. It is also presented the identification of the main human actions considered along with the possible recovery actions included. The development of the data base and the assumptions and limitations in the data base are also described in this volume. The accident sequences quantification process and the resolution of the core vulnerable sequences are presented. In this volume, the source and treatment of uncertainties associated with failure rates, component unavailabilities, initiating event frequencies, and human error probabilities are also presented. Finally, the main results and conclusions for the Internal Event Analysis for Laguna Verde Nuclear Power Plant are presented. The total core damage frequency calculated is 9.03x 10-5 per year for internal events. The most dominant accident sequences found are the transients involving the loss of offsite power, the station blackout accidents, and the anticipated transients without SCRAM (ATWS). (Author)

  15. Analysis of the noise of the jet pumps of the Unit 2 of the Laguna Verde nuclear power plant; Analisis de ruido de las bombas de chorro de la Unidad 2 de la Central Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Castillo D, R.; Ortiz V, J.; Ruiz E, J.A. [ININ, A.P. 18-1027, 11801 Mexico D.F. (Mexico); Calleros M, G. [CFE, Central Nucleoelectrica de Laguna Verde, Alto Lucero, Veracruz (Mexico)]. E-mail: rcd@nuclear.inin-mx

    2004-07-01

    The use of the analysis of noise for the detection of badly functioning of the components of a BWR it is a powerful tool in the determination of abnormal conditions of operation, during the life of a nuclear plant of power. From the eighties, some nuclear reactors have presented problems related with the jet pumps and the knots of the recirculation. The Regulatory Commission of the United States, in the I E bulletin 80-07, recommended to carry out a periodic supervision of the pressure drop of the jet pumps, to prevent structural failures. In this work, methods of analysis of noise are used for the detection of abnormal conditions of operation of the jet pumps of a BWR. Signals are analysed to low and high frequency of pressure drop with the NOISE software that is in development. The obtained results show the behavior of the jet pumps of jet 6 and 11 before and after a partial blockade in their throats where the pump 6 return to their condition of previous operation and the pump 11 present a new fall of pressure, inside the limit them permissible of operation. The methodology of the analysis of noise demonstrated to be an useful tool for the badly functioning detection, and you could apply to create a database to supervise the dynamic behavior of the jet pumps of an BWR. (Author)

  16. Third Regional Meeting: Nuclear Energy in Central Europe, Proceedings

    International Nuclear Information System (INIS)

    Third Regional Meeting for Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 71 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region. Topics are: Research Reactors, Reactor Physics, Probabilistic Safety Assessment, Severe Accident management, Thermal Hydraulics, NPP Operation, Radioactive Waste Management, Main Components Integrity, Environment and Other Aspects and Public Information

  17. BORILAIN. Mobile device for automatic continuous supply of liquid injection system backup of a nuclear plant in emergency; BORILAIN. Dispositivo movil para el abastecimiento automatico en continuo del sistema de inyeccion del liquido de reserva de una central nuclear en situacion de emergencia

    Energy Technology Data Exchange (ETDEWEB)

    Lacalle, J.; Traino, J.; Troeung, J.; Arnaldos, A.; Alcaraz, D. A.; Lopez, B.; Ponce, A. T.

    2014-07-01

    This paper presents the design and development of the first automatic mobile device for the preparation of a neutron absorbing solution, and providing continuous, 30 days, of the injection system liquid reserve of a nuclear emergency. The work has been developed by GD Energy Services (GDES) for Electricite de France (EDF). (Author)

  18. UPVAPOR: computer application for the analysis of the results of Cofrentes Nuclear Power Plant production; UPVAPOR: Aplicacion informatica para el analisis de resultados de produccion en Central Nuclear Cofrentes

    Energy Technology Data Exchange (ETDEWEB)

    Palomo, M. J.; Baraza Peregrin, A.; Bucho Piqueras, L.; Vaquer Perez, J. I.; Lopez Lopez, B.

    2010-07-01

    UPVapor is a software developed for the Cofrentes Nuclear Power Plant Group of Results. This application presents a graphical environment for analysis in which the user has available many variables registered to configure the graphics. This application saves a lot of time at work because it allows other users to do their own analysis without resorting to analysts.

  19. Technical and economic proposal for the extension of the Laguna Verde Nuclear Power plant with an additional nuclear reactor; Propuesta tecnica y economica para la ampliacion de la Central Nucleoelectrica Laguna Verde con un reactor nuclear adicional

    Energy Technology Data Exchange (ETDEWEB)

    Leal C, C.D.; Francois L, J.L. [Facultad de Ingenieria, UNAM, Circuito Interior, C.U. Coyoacan, 04510 Mexico D.F. (Mexico)]. e-mail: carlosdanielleal@yahoo.com.mx

    2006-07-01

    The increment of the human activities in the industrial environments and of generation of electric power, through it burns it of fossil fuels, has brought as consequence an increase in the atmospheric concentrations of the calls greenhouse effect gases and, these in turn, serious repercussions about the environment and the quality of the alive beings life. The recent concern for the environment has provoked that industrialized countries and not industrialized carry out international agreements to mitigate the emission from these gases to the atmosphere. Our country, like part of the international community, not is exempt of this problem for what is necessary that programs begin guided toward the preservation of the environment. As for the electric power generation, it is indispensable to diversify the sources of primary energy; first, to knock down the dependence of the hydrocarbons and, second, to reduce the emission of polluting gases to the atmosphere. In this item, the nucleo electric energy not only has proven to be safe and competitive technical and economically, able to generate big quantities of electric power with a high plant factor and a considerable cost, but rather also, it is one of the energy sources that less pollutants it emits to the atmosphere. The main object of this work is to carry out a technical and economic proposal of the extension of the Laguna Verde Nuclear power plant (CNLV) with a new nuclear reactor of type A BWR (Advanced Boiling Water Reactor), evolutionary design of the BWR technology to which belong the two reactors installed at the moment in the plant, with the purpose of increasing the installed capacity of generation of the CNLV and of the Federal Commission of Electricity (CFE) with foundation in the sustainable development and guaranteeing the protection of the environment by means of the exploitation of a clean and sure technology that counts at the moment with around 12,000 year-reactor of operational experience in more of

  20. Feasibility analysis in the expansion proposal of the nuclear power plant Laguna Verde: application of real options, binomial model; Analisis de viabilidad en la propuesta de expansion de la central nucleoelectrica Laguna Verde: aplicacion de opciones reales, modelo binomial

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez I, S.; Ortiz C, E.; Chavez M, C., E-mail: lunitza@gmail.com [UNAM, Facultad de Ingenieria, Circuito Interior, Ciudad Universitaria, 04510 Mexico D. F. (Mexico)

    2011-11-15

    At the present time, is an unquestionable fact that the nuclear electrical energy is a topic of vital importance, no more because eliminates the dependence of the hydrocarbons and is friendly with the environment, but because is also a sure and reliable energy source, and represents a viable alternative before the claims in the growing demand of electricity in Mexico. Before this panorama, was intended several scenarios to elevate the capacity of electric generation of nuclear origin with a variable participation. One of the contemplated scenarios is represented by the expansion project of the nuclear power plant Laguna Verde through the addition of a third reactor that serves as detonator of an integral program that proposes the installation of more nuclear reactors in the country. Before this possible scenario, the Federal Commission of Electricity like responsible organism of supplying energy to the population should have tools that offer it the flexibility to be adapted to the possible changes that will be presented along the project and also gives a value to the risk to future. The methodology denominated Real Options, Binomial model was proposed as an evaluation tool that allows to quantify the value of the expansion proposal, demonstrating the feasibility of the project through a periodic visualization of their evolution, all with the objective of supplying a financial analysis that serves as base and justification before the evident apogee of the nuclear energy that will be presented in future years. (Author)

  1. Assessment of occupational radiation protection conditions during power enhancement of the Angra-2 nuclear power plant; Avaliacao das condicoes de radioprotecao ocupacional durante a elevacao de potencia na Unidade 2 da Central Nuclear Almirante Alvaro Alberto - Angra-2

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Eduardo M.; Rocha, Antonio Carlos S.; Ferreira, Paulo R.R.; Mouco, Charles Dickens C.L.; Godoy, Jose M.O.; Matta, Luiz E.S.C. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)

    2001-07-01

    This paper intend to analyse the occupational radioprotection conditions of the Angra-2 nuclear power plant, from the startup up to reach 100% of the nominal power. To perform this work a group of dose rates measures was made including beta/gamma and neutron radiation, particulates and iodine monitoring, and surface contamination, during the whole process. These measures were made inside of the three main buildings: the reactor buildings (UJA - reactor core and UJB) and the Reactor Auxiliary Building (UKA). (author)

  2. CAGE: A standard design application to nuclear power plants of Cofrentes, Almaraz and Trillo; CAGE: Un diseno estandar de aplicacion a las centrales nucleares de Cofrentes, Almaraz y Trillo

    Energy Technology Data Exchange (ETDEWEB)

    Cubian Martinez, B.; Gomez Gomez, M.; Zornoza Garcia-Andrade, J.; Turrion Lopez, F.; Barrio, M. A. del; Cobos Perabad, A.; Garcia-Serrano, J. L.

    2016-08-01

    Design, engineering, supply, construction, assembly, supervision and quality control, construction management and commissioning of Alternative Emergency Management Centres (CAGES) of nuclear power plants Cofrentes (CNC), Almaraz (CNA) and Trillo (CNT) were awarded in the first half of 2014 to Iberdrola Engineering and Construction (IIC). After obtaining the required building permits issued by municipalities, following the delivery of the corresponding, basic project and execution, in January 2015, began civil works at CNA, CNT and in February of this year in CNC. (Author)

  3. Instruction by virtual reality to operation and security of a nuclear power plant of IV generation; Instruccion por realidad virtual a la operacion y seguridad de una central nuclear de generacion IV

    Energy Technology Data Exchange (ETDEWEB)

    Neri O, J. C.; Baltasar M, J.; Valle H, J. [Facultad de Ingenieria, Division de Estudios de Posgrado, Campus Morelos, UNAM, Paseo Cuauhnahuac 8532, Col. Progreso, 62550 Jiutepec, Morelos (Mexico)], e-mail: neriunam@ieee.org

    2009-10-15

    The purpose of LaNuVi project which is developing in the Engineering Faculty of National Autonomous University of Mexico, to have a virtual laboratory of nuclear reactors as tool of multidisciplinary education at basic and advanced levels in nuclear engineering area, involves training resources in audio visual and interactive form that allow to form a comprehension more realistic of operation of different systems and components. In this work is proposed to use educational resources, as the employees in the U.S. Army and in some centers of advanced education of medicine, where have been come proving concepts like projected reality, increased reality, tele transparency and others that present big benefits to learning-education process. The proposal here is to include the resource knew as serious game based learning. The focal point of stage that is presented is of a nuclear reactor PBMR like desalination and generator of controlled alternating energy and efficient that should put on in operation to allow the subsistence of a community in a desolated region of beginning second quarter of X XI century. For this purpose the designs are initiated and programmed several subsystems that allow the three-dimensional modeling of main components of a PBMR as well as of surrounding facilities. The obtained results and reaches of this design are presented. The product is in tests for a first version and it is hope to achieve a free and integral resource of national distribution for different cultural groups, interested in this type of advanced technology. (Author)

  4. Construction project of Flamanville 3 NPP. The participation of Iberdrola engineering and Construction; El proyecto de construccion de la central nuclear de Flamanville 3. La participacion de Iberdrola Ingenieria y Construccion

    Energy Technology Data Exchange (ETDEWEB)

    Diaz Prada, J. I.; Cubian, B.

    2014-10-01

    Iberdrola Engineering and Construction (IIC) leads several projects mini EPC for the EPR Flamanville 3 NPP for providing important for safety components and auxiliary systems in the pump house and in the turbine island. The realization of this new nuclear project has been a challenge from the technical and organizational perspective because the plant is the first of the new nuclear station (FDAKE) type EPR 1700 MWe series in a highly restrictive environment due to to the large number of particular requirements from the final customer and the meager degree of progress of the design to the date of commencement of construction. (Author)

  5. Decontamination equipment for the bottom of the cavity NPP during refueling operations; Equipo para la descontaminacion del fondo de la cavidad de centrales nucleares durante las operaciones de recarga de combustible

    Energy Technology Data Exchange (ETDEWEB)

    Vaquer, J. I.; Pastor, I.; Pascual, A.; Garcia Martinez, A.

    2014-04-01

    In this work the DEMOS robot is displayed, as a designed and developed equipment by Grupo Dominguis in order to carry out the decontamination of the cavity background in Nuclear Power Plants during the refueling operations. the aim of the project is executing the decontamination of the cavity ground, in case of flood pool, by means of brushing and aspirated after the fuel movement operation, in order to reduce the operational dose of the workers. In the activities that are carried out after while in the cavity. Eventually, the obtained results of the operative experience in many Nuclear Power Plants will be displayed. (Author)

  6. Pensar la organización del tiempo de trabajo cuando la tecnología cambia: el caso del equipo de trabajo de operación de una central nuclear

    Directory of Open Access Journals (Sweden)

    Sophie Prunier-Poulmaire

    2011-12-01

    Full Text Available The construction of a new generation of nuclear power plant has implied an ergonomics contribution in order to define the shift work schedule for the future operation crew. The study was carried out in three existing nuclear power plants through observation of activities specific to the concerned operating professionals. The data collected highlights major disparities between the performed tasks and their dynamics in terms of physical and mental demands. Furthermore, the same data underlines a strong temporal interdependence amidst the operation crew based on shift work schedules and the maintenance crew organized with set day time schedules. Vast differences are also recorded in terms of physical and mental demands of the tasks performed between day and night shifts as well as between the different stages of nuclear installations. The difficulties of workforce management are also at the source of large differences concerning the theoretical shift work schedule and the shift work schedule in place. In a multifactorial and systemic approach, with the general knowledge of chronobiology and the characteristics of the population involved, the outcomes will be a necessary component to define the shift work schedule for the operation crew of the nuclear power plant in construction.

  7. Estimation of requirements of eolic energy equivalent to the electric generation of the Laguna Verde nuclear power plant; Estimacion de requerimientos de energia eolica equivalente a la generacion electrica de la Central Nucleoelectrica de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Garcia V, M.A.; Hernandez M, I.A. [Facultad de Ingenieria, Division de Ingenieria Electrica, UNAM, 04510 Mexico D.F. (Mexico)]. E-mail: maiki27@yahoo.com; Martin del Campo M, C. [Facultad de Ingenieria, Laboratorio de Analisis en Ingenieria de Reactores Nucleares, UNAM, Paseo Cuauhnahuac 8532, 62550 Jiutepec, Morelos (Mexico)

    2004-07-01

    The advantages are presented that have the nuclear and eolic energy as for their low environmental impact and to the human health. An exercise is presented in the one that is supposed that the electric power generated by the Laguna Verde Nuclear Power plant (CNLV), with capacity of 1365 M W, it should be produced by eolic energy when in the years 2020 and 2025 the units 1 and 2 of the CNLV reach its useful life and be moved away. It is calculated the number of aero generators that would produce the electric power average yearly of the CNLV, that which is equal to install eolic parks with capacity of 2758 M W, without considering that it will also be invested in systems of back generation to produce electricity when the aero generators stops for lack of wind. (Author)

  8. Viabilidade de uso do delineamento composto central

    Directory of Open Access Journals (Sweden)

    Nazaré Barata Mateus

    2001-05-01

    Full Text Available O delineamento composto central é um delineamento simétrico e de segunda ordem, constituído de duas partes: o fatorial 2k, com um ou mais pontos centrais, e a parte axial. O objetivo deste trabalho foi o de verificar, com simulações, a viabilidade do uso desse tipo de delineamento nas áreas de pesquisas de campo, como em Agronomia; em laboratórios de Fitopatologia, Virologia e Entomologia, em pesquisas onde o coeficiente de variação não é superior a 6%; e na indústria química, com coeficiente de variação abaixo de 3%. Através das simulações, verificou-se que seu uso não é conveniente em áreas de pesquisa, cujo coeficiente de variação seja superior a 6%, quando se buscam estimativas de resposta e dos pontos ótimos e também em pesquisas de campo, como na Agronomia, mesmo quando se repetem todos os tratamentos, pois se observam muitas respostas e pontos bem longe do esperado

  9. Modernization of the Electric Power Systems (transformers, rods and switches) in the Laguna Verde Nuclear Power Plant (Mexico); Modernizacion de los Sistemas Electricos de Potencia (Transformadores de Principales, Interruptor de Generacion, Barras de Fase Aislada) de la Central Nuclear de Laguna Verde (Mexico)

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Solarzano, J. J.; Gabaldon Martin, M. A.; Pallisa Nunez, J.; Florez Ordeonez, A.; Fernandez Corbeira, A.; Prieto Diez, I.

    2010-07-01

    Description of the changes made in the Electric Power Systems as a part of the power increase project in the Laguna Verde Nuclear Power Plant (Mexico). The main electrical changes to make, besides the turbo group, are the main generation transformers, the isolated rods and the generation switch.

  10. 30 years of Central Institute for Nuclear Research at Rossendorf

    International Nuclear Information System (INIS)

    A celebration and a scientific colloquium dedicated the 30th anniversary of the foundation of the Central Institute for Nuclear Research (CINR) of the GDR Academy of Sciences were held on January, 23rd and 24th, '86 at Rossendorf. The speaches and lectures given by the president of the GDR Academy of Sciences and by scientists of the CINR dealt with problems of policy of science, history of the CINR, nuclear methods, microelectronics, nuclear energy research, development and production of radioisotopes and scientific instruments. (author)

  11. Internal event analysis of Laguna Verde Unit 1 Nuclear Power Plant. System Analysis; Analisis de Eventos Internos para la Unidad 1 de la Central Nucleoelectrica de Laguna Verde. Analisis de sistemas

    Energy Technology Data Exchange (ETDEWEB)

    Huerta B, A.; Aguilar T, O.; Nunez C, A.; Lopez M, R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, 03000 Mexico D.F. (Mexico)

    1993-07-01

    The Level 1 results of Laguna Verde Nuclear Power Plant PRA are presented in the {sup I}nternal Event Analysis of Laguna Verde Unit 1 Nuclear Power Plant{sup ,} CNSNS-TR-004, in five volumes. The reports are organized as follows: CNSNS-TR-004 Volume 1: Introduction and Methodology. CNSNS-TR-004 Volume 2: Initiating Event and Accident Sequences. CNSNS-TR-004 Volume 3: System Analysis. CNSNS-TR-004 Volume 4: Accident Sequence Quantification and Results. CNSNS-TR-004 Volume 5: Appendices A, B and C. This volume presents the results of the system analysis for the Laguna Verde Unit 1 Nuclear Power Plant. The system analysis involved the development of logical models for all the systems included in the accident sequence event tree headings, and for all the support systems required to operate the front line systems. For the Internal Event analysis for Laguna Verde, 16 front line systems and 5 support systems were included. Detailed fault trees were developed for most of the important systems. Simplified fault trees focusing on major faults were constructed for those systems that can be adequately represent,ed using this kind of modeling. For those systems where fault tree models were not constructed, actual data were used to represent the dominant failures of the systems. The main failures included in the fault trees are hardware failures, test and maintenance unavailabilities, common cause failures, and human errors. The SETS and TEMAC codes were used to perform the qualitative and quantitative fault tree analyses. (Author)

  12. Corrosion in nuclear power plants and it implication in the leak before break criteria; Corrosion en centrales nucleares y su implicacion en el criterio de fuga antes de ruptura

    Energy Technology Data Exchange (ETDEWEB)

    Martinez M, E

    1992-05-15

    The corrosion in a general way can be defined like a chemical or electrochemical reaction, which is carried out in the surface of the metallic materials exposed to a specific medium. Due to the operation conditions in the nuclear power plants are practically fixed and its modification in most of the cases is difficult or expensive, the natural tendency to prevent the corrosion has been generally directed toward the selection of materials. Numerous materials have been employees as substitute of the traditional steels, among other the stabilized stainless steels, those of extra low carbon and numerous nickel base alloys. The basic evaluation that establishes the approach Leak before break (LBB) it involves the analysis by means of 'fracture mechanics' of a postulated crevice that it crosses the thickness of the material, which causes a same flight, with a margin of safety, to the detection limit that it has for a shutdown of the reactor. Due to the crevice size postulated, it cannot be established highly starting from the mechanical properties of the material since these its will be affected by the corrosion mechanisms that can settle down, it was determined that the implementation of the LBB criteria, it cannot be established for components or systems that its are susceptible of suffering corrosion. (Author)

  13. Los Discursos de Legitimación de la Industria Nuclear Española

    Directory of Open Access Journals (Sweden)

    Luis Sánchez Vázquez

    2009-06-01

    Full Text Available La controversia sobre el uso de la energía nuclear es un tema clave en el actual debate sobre el modelo energético. El análisis de esta situación desde la perspectiva de los estudios de Ciencia y Tecnología para la Paz ayuda a esclarecer ciertos condicionantes de la introducción y desarrollo de opción energética en nuestro país y en el contexto internacional, con objeto de contribuir al esclarecimiento de ciertas posiciones dentro del panorama energético actual. En este marco, el trabajo intenta recoger la evolución del discurso de la industria nuclear española sobre los principales focos conflictivos asociados a la energía nuclear, a través del análisis de las publicaciones del Foro de la Industria Nuclear Española durante el periodo de mayor auge de dicha industria y la comparación con el discurso actual. Para ello han sido escogidos los documentos publicados por el Foro Nuclear en los periodos 1963-1977 y 2000-2004, de cuyo análisis se desprende una evolución notable de las posiciones en temas como la opinión pública o el cambio climático; ciertos cambios en los argumentos sobre los costes de generación nucleares o la seguridad de las centrales; mientras que el discurso permanece muy similar en una cuestión central como los residuos.

  14. The nuclear sector in Russia and Central Europe

    International Nuclear Information System (INIS)

    This document is a compilation of texts presented during a workshop at the French National Assembly (Paris, December 2, 1993). Participants are political, economical, technical or military specialists of the nuclear question in Eastern countries and Russia and comes from various French, European or international organisations involved in nuclear industry. The aim of the workshop is to debate about the economical and safety aspects of nuclear installations in Eastern and Central Europe countries, and about the financial and human means that occidental countries can provide for the improvement of installations safety. Also political and military aspects of the international control of nuclear trade, nuclear weapons and fissile materials management in the Independent States Community is discussed. (J.S.). 4 figs., 13 tabs

  15. Preliminary analysis of containment failure modes for Atucha-1 nuclear power plant during severe accidents; Analisis preliminar de modos de fallas de la contencion de la Central Atucha I durante accidentes severos

    Energy Technology Data Exchange (ETDEWEB)

    Baron, Jorge; Caballero, Carlos; Zarate, Stella Maris [Ente Nacional Regulador Nuclear (ENREN), Buenos Aires (Argentina)

    1996-07-01

    The present work has the objective to analyze the containment behavior of the Atucha-I Nuclear Power Plant during a severe accident, as part of a Probabilistic Safety Assessment. Initially, a generic description of the containment failure modes considered in other PSAs As is performed. Then, the possible containment failure modes for Atucha I are qualitatively analyse, according to its design peculiarities. These failure modes involve some substantial differences from other PSAs As, due to the particular design of Atucha I. Among others, it is studied the influence of moderator/coolant separation, existence of cooling zircaloy channels, existence of filling bodies inside the pressure vessel, reactor cavity geometry, on-line refuelling mode, and existent of a double shell containment (steel and concrete) with an annular separation room. As a functions of the before mentioned analysis, a series of parameters to be taken into account is defined, on a preliminary basis, for the definition of the Plant Damage States. (author)

  16. Análisis de la respuesta estructural del edificio de contención de un reactor nuclear PWR frente a una secuencia de Station Blackout

    OpenAIRE

    Martínez Casanovas, Josep Maria

    2013-01-01

    Después del Accidente que sucedió el 11 de marzo de 2011 en la central nuclear de Daichii-Fukushima, han sido muchos los debates reabiertos acerca de la seguridad que ofrecen los reactores nucleares en operación. Debido a las incertidumbres que este accidente ha suscitado, surge ésta tesina, en la que se pretende conocer y comprender técnicamente que sucedería si un accidente similar al de Fukushima ocurriese en uno de los reactores de nuestro país. Con el principal objetivo de encontrar res...

  17. Analysis of the micro-structural damages by neutronic irradiation of the steel of reactor vessels of the nuclear power plant of Laguna Verde. Characterization of the design steel; Analisis de los danos micro-estructurales por irradiacion neutronica del acero de la vasija de los reactores de la Central Nuclear de Laguna Verde. Caracterizacion del acero de diseno

    Energy Technology Data Exchange (ETDEWEB)

    Moranchel y Rodriguez, M.; Garcia B, A. [IPN, Escuela Superior de Fisica y Matematicas, Departamento de Fisica, Av. Luis Enrique Erro s/n, Unidad Profesional Adolfo Lopez Mateos, Col. Lindavista, 07738 Mexico D. F. (Mexico); Longoria G, L. C., E-mail: mmoranchel@ipn.m [ININ, Direccion de Investigacion Cientifica, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2010-09-15

    The vessel of a nuclear reactor is one of the safety barriers more important in the design, construction and operation of the reactor. If the vessel results affected to the grade of to have fracture and/or cracks it is very probable the conclusion of their useful life in order to guarantee the nuclear safety and the radiological protection of the exposure occupational personnel, of the public and the environment avoiding the exposition to radioactive sources. The materials of the vessel of a nuclear reactor are exposed continually to the neutronic irradiation that generates the same nuclear reactor. The neutrons that impact to the vessel have the sufficient energy to penetrate certain depth in function of the energy of the incident neutron until reaching the repose or to be absorbed by some nucleus. In the course of their penetration, the neutrons interact with the nuclei, atoms, molecules and with the same crystalline nets of the vessel material producing vacuums, interstitial, precipitate and segregations among other defects that can modify the mechanical properties of the steel. The steel A533-B is the material with which is manufactured the vessel of the nuclear reactors of nuclear power plant of Laguna Verde, is an alloy that, among other components, it contains atoms of Ni that if they are segregated by the neutrons impact this would favor to the cracking of the same vessel. This work is part of an investigation to analyze the micro-structural damages of the reactor vessels of the nuclear power plant of Laguna Verde due to the neutronic irradiation which is exposed in a continuous way. We will show the characterization of the design steel of the vessel, what offers a comprehension about their chemical composition, the superficial topography and the crystalline nets of the steel A533-B. It will also allow analyze the existence of precipitates, segregates, the type of crystalline net and the distances inter-plains of the design steel of the vessel. (Author)

  18. Revision of by-laws about effluents of EdF's nuclear power plants; Revision des arretes de rejets des centrales nucleaires d'EDF

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    In France, in application of the clean water law from January 3, 1992 and since the decree 95-540 from May 4, 1995, each basic nuclear facility receives a single permission which covers both its water takes and its radioactive and non-radioactive effluents. This decree, initially dedicated to new facilities has been enlarged to all existing installations for which the prefectorial by-laws have reached their date-line. Thus, up to now, five inter-ministerial by-laws have renewed the permissions of water takes and effluents evacuation of the power plants of Saint-Laurent-des-Eaux (Loir-et-Cher), Flamanville (Manche), Paluel (Seine-Maritime), Belleville (Cher) and Saint-Alban (Isere). These by-laws foresee an important abatement of the effluents and concern more particularly the tritium, {sup 14}C, the iodine isotopes and also some other non-radioactive chemical compounds. This document is a compilation of all revised by-laws about effluents and concerning the nuclear power plants listed above. (J.S.)

  19. Nuclear Research Center Karlsruhe, Central Safety Department. Annual report 1992

    International Nuclear Information System (INIS)

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The research and development work concentrates on the following aspects: Physical and chemical behavior of trace elements in the environment, biophysics of multicellular systems, behavior of tritium in the air/soil-plant system, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1992 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.)

  20. Proceedings of the Second Regional Meeting on Nuclear Energy in Central Europe

    International Nuclear Information System (INIS)

    Second Regional Meeting for Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contains 75 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region

  1. Polarographic determination of Iodide and Iodate, in Solutions Coming from Aerosols in Fission Products Containment Studies in Nuclear Power Stations; Determinacion Polarografica de Especies de Iodo (Ioduro y Iodato) en Soluciones Procedentes de Aerosoles, para Estudios de Contencion de Productos de Fision en Centrales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez, M.; Ballesteros, O.; Fernandez, M.; Clavero, M.; Gonzalez, A. M. [Ciemat, Madrid (Spain)

    2000-07-01

    A polarographic method is described for the iodine species determination, iodide and iodate in water solutions. the iodate can be determined by differential pulse polarography. Calibration curves and the detection and determination limits have been obtained. Iodides is oxidized to iodate with sodium hypochlorite and the excess of oxidizing agent is destroyed with sodium sulphide. The concentration of iodide is calculated as the difference between the concentration of iodate in the sample before and after the oxidation. As an application, species of iodine in samples coming from the experimental plants GIRS (Gaseous Iodine Removal by Sprays) of Nuclear Fission Department of the CIEMAT, dedicated to fission products containment studies in nuclear power station, were determined. (Author) 10 refs.

  2. El desarrollo nuclear de Argentina y Brasil

    OpenAIRE

    Quintanar, Silvia; Romegialli, Mónica

    2004-01-01

    En el Cono Sur Latinoamericano, Brasil y Argentina han concluido en materia de energía atómica una serie de acuerdos bilaterales, con jerarquía de tratados vinculatorios, que aseguran el uso exclusivamente pacífico de la energía nuclear. En los años 90 se profundiza el fortalecimiento de la confianza mutua, los gobiernos de Carlos Menem, en Argentina, Collor de Melho, Itamar Franco y Fernando H. Cardoso, en Brasil, siguen los lineamientos de las grandes potencias y en particular de Estados Un...

  3. Annual progress report on nuclear data 1983 of the Central Bureau for Nuclear Measurements, Geel (Belgium)

    International Nuclear Information System (INIS)

    In this progress report of the Central Bureau for Nuclear Measurements at Geel (Belgium) researches related to neutron data and to non-neutron nuclear data are gathered. Neutron data are essentially related to cross-section measurements: for instance, concerning actinides, structural materials as Cr and Fe, fission products. Some studies are classified as concerning standard neutron data. Underlying physics is no forgotten neither than equipment (linear accelerator). Non-neutron nuclear data is concerned essentially with decay studies. Some compilations and evaluations are also given. Improvement of measurement and source preparation techniques is a part of this section

  4. Analysis of internal events for the Unit 1 of the Laguna Verde Nuclear Power Station. Appendixes; Analisis de eventos internos para la Unidad 1 de la Central Nucleoelectrica de Laguna Verde. Apendices

    Energy Technology Data Exchange (ETDEWEB)

    Huerta B, A.; Lopez M, R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, 03000 Mexico D.F. (Mexico)

    1995-07-01

    This volume contains the appendices for the accident sequences analysis for those internally initiated events for Laguna Verde Unit 1, Nuclear Power Plant. The appendix A presents the comments raised by the Sandia National Laboratories technical staff as a result of the review of the Internal Event Analysis for Laguna Verde Unit 1 Nuclear Power Plant. This review was performed during a joint Sandia/CNSNS multi-day meeting by the end 1992. Also included is a brief evaluation on the applicability of these comments to the present study. The appendix B presents the fault tree models printed for each of the systems included and analyzed in the Internal Event Analysis for LVNPP. The appendice C presents the outputs of the TEMAC code, used for the cuantification of the dominant accident sequences as well as for the final core damage evaluation. (Author)

  5. Analysis of internal events for the Unit 1 of the Laguna Verde Nuclear Power Station. Appendixes; Analisis de eventos internos para la Unidad 1 de la Central Nucleoelectrica de Laguna Verde. Apendices

    Energy Technology Data Exchange (ETDEWEB)

    Huerta B, A.; Lopez M, R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, 03000 Mexico D.F. (Mexico)

    1995-07-01

    This volume contains the appendices for the accident sequences analysis for those internally initiated events for Laguna Verde Unit 1, Nuclear Power Plant. The appendix A presents the comments raised by the Sandia National Laboratories technical staff as a result of the review of the Internal Event Analysis for Laguna Verde Unit 1 Nuclear Power Plant. This review was performed during a joint Sandia/CNSNS multi-day meeting by the end 1992. Also included is a brief evaluation on the applicability of these comments to the present study. The appendix B presents the fault tree models printed for each of the systems included and.analyzed in the Internal Event Analysis for LVNPP. The appendice C presents the outputs of the TEMAC code, used for the cuantification of the dominant accident sequences as well as for the final core damage evaluation. (Author)

  6. Rol del fallo mecánico en la optimización del mantenimiento en una central nuclear//Role of the mechanical failure during the maintenance optimization in the nuclear power plant

    OpenAIRE

    Antonio Torres - Valle

    2012-01-01

    Entre las más recientes aplicaciones del Análisis Probabilista de Seguridad (1997 – 2003) de la Central Nuclear Embalse en Argentina, está el Programa de Mantenimiento Orientado a la Seguridad (2006– 2009) el cual se ha desarrollado con el empleo de la metodología de Mantenimiento Centrado en la Confiabilidad (RCM en inglés). El objetivo general del artículo es demostrar la alta contribución de los fallos mecánicos en el diseño de las políticas de mantenimiento de varios sistemas de la instal...

  7. Settling and growth of D. polymorpha in the raw water circuits of the Cattenom nuclear power plant (Moselle, France); Fixation et croissance de D. Polymorpha dans les circuits d`eau brute de la centrale nucleaire de Cattenom

    Energy Technology Data Exchange (ETDEWEB)

    Moreteau, J.C.; Khalanski, M.

    1994-05-01

    A``biological profile`` of the zebra mussels which are infesting certain circuits of the Cattenom nuclear power plant has been provided by data collected during a three-year measurement programme (1991-1993). The larval settlement periods and the growth of settled mussels were monitored. A simple mathematical model, which calculates the shell growth on the long term, was calibrated with the field data. It is based on three functions representing the effect of the initial size, water temperature and fool availability (plankton chlorophyll a). (authors). 13 refs., 7 figs., 4 tabs.

  8. How the organization and human factors positively impact the contractors of nuclear power plants; Como la organizacion y los factores humanos repercuten positivamente en las empresas contratistas de las centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Arnaldos, A.; Shannon, M.; Walter, J.; Mendoza, J.

    2012-11-01

    It is recognised that organisations that pay attention to creating a robust nuclear safety culture are likely to be a lower risk than those who do not. the same concept can be applied to contractors. In this article we will focus on the implementation of safety culture and programs to reduce human error in nuclear sector contractors and, on how these programs have a beneficial impact to achieve the safety goals, not only for the company, but for the client who owns the work site. (Author)

  9. Review of progress in modelling for the assessment of the operating life of a nuclear power plant; Panorama des progres de la modelisation au service de la duree de vie des centrales

    Energy Technology Data Exchange (ETDEWEB)

    Monnier, B. [Electricite de France (EDF/RD), 78 - Chatou (France); Gilles, Ph. [FRAMATOME ANP, 92 - Paris-La-Defence (France); Chauliac, Ch. [CEA Saclay, Dir. de l' Energie Nucleaire DEN/DSOE, 91 - Gif sur Yvette (France)

    2004-07-01

    This article reviews the contributions of simulation and modelling to the assessment of the service life of a nuclear power plant. 4 aspects are considered. The first aspect concerns the operating life of the reactor vessel, in order to evaluate its aging a series of more or less intertwined modelling is necessary, they concern thermal-hydraulic transients, neutron fluences, damages due to irradiation and thermal-mechanical behaviour. The second aspect is the use of simulation to optimize non-destructive testing (NDT) particularly to assess the performances and limits of NDT methods in order to assure safety in any situation. The third aspect concerns the simulation of welding in order to assess the risk of defect occurrence, the pile-up of residual stresses and the feasibility of a complex welding. The last aspect is a global simulation of a nuclear unit as a whole involving its main components such as vessel, pumps, steam generators, turbine...; their maintenance, their failure risks in order to define indicator parameters that are relevant to the real state of the plant. (A.C.)

  10. Nuclear legislation in Central and Eastern Europe and the NIS

    CERN Document Server

    2000-01-01

    This publication examines the legislation and regulations governing the peaceful uses of nuclear energy in eastern European countries. It covers 11 countries from Central and Eastern Europe and 11 countries from the New Independent States. The chapters follow a systematic format making it easier for the reader to carry out research and compare information. This study will be updated regularly. Albania Kazakhstan Armenia Latvia Belarus Lithuania Bosnia and Herzegovina Poland Bulgaria Republic of Moldova Croatia Romania Czech Republic Russian Federation Estonia Slovak Republic Former Yugoslav Re

  11. Evolution of Technology Laser Scanner. Implications for use in Nuclear Power and Radioactive Facilities; Evolucion de la Tecnologia Laser Escaner. Implicaciones en uso en Centrales Nucleares e Instalaciones Radioactivas

    Energy Technology Data Exchange (ETDEWEB)

    Sarti Fernandez, F.; Bonet, J.

    2012-07-01

    The main technical factors affecting these teams their actual implementation in nuclear power plants will be analyzed: data acquisition speed, sensitivity, laser power, autonomy, contamination of equipment, radiation effect, etc. In conclusion, the real difference is displayed in the data collection in function of various technologies, embodied in field time, and costs.

  12. Nuclear fragmentation in central collisions: Ni + Au from 32 to 90 A*MeV; Fragmentation dans les collisions centrales du systeme Ni + Au de 32 a 90 A MeV

    Energy Technology Data Exchange (ETDEWEB)

    Bellaize, N

    2000-11-03

    Heavy ion collisions are one of tools for studying nuclear system far away from its equilibrium state. This work concerns the most violent collisions in the Ni + Au system for incident energies ranging from 32 up to 90 AMeV. These events were detected with the multidetector INDRA and selected by the Principal Component Analysis (multidimensional analysis). This method classifies the events according their detection features and their degree of dissipation. We observed two deexcitation mechanisms: a fusion/fission - evaporation process and a multifragmentation process. Those two coexist from 32 to 52 AMeV whereas only one subsists at 90 AMeV. For those two mechanisms, an component was observed which seems to be linked to the initial phase of the reaction. The energy fluctuations of this component leads to variations in the energy deposit which determines the deexcitation of the system. The experimental multifragmentation data of the Ni + Au system (52 and 90 AMeV) were compared to the predictions of a statistical model and to the experimental data of the system Xe + Sn at 50 AMeV (also detected with INDRA). These comparisons show the lack of collective radial energy for fragments (Z{>=}10) in the Ni + Au system, and show that the degree of multifragmentation depends of the thermal excitation energy. Mean kinetic energies of particles and lights fragments (Z{>=}10) are larger in the Ni + Au system than the Xe + Sn system. This observation shows that these particles are more sensitive to the entrance channel for an asymmetric system than for a symmetric system (for the same number of nucleons). (author)

  13. Introduction of fuel GE14 in the nuclear power plant of Laguna Verde for the extended increase of power; Introduccion del combustible GE14 en la central nuclear Laguna Verde para el aumento de potencia extendido

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez M, N.; Vargas A, A. F.; Cardenas J, J. B.; Contreras C, P. [CFE, Central Nuclear Laguna Verde, Subgerencia de Ingenieria, Carretera Veracruz-Medellin Km. 7.5 (Mexico)]. e-mail: natividad.hernandez@cfe.gob.mx

    2008-07-01

    The project of extended increase of power responds to a necessity of electrical energy in the country, increasing the thermal exit of the reactors of the nuclear power plant of Laguna Verde of 2027 MWt to 2317 MWt. In order to support this transition, changes will make in the configuration of the reactor core and in the operation strategies of the cycle, also they will take initiatives to optimize the economy in fuel cycle. At present in both reactors of the nuclear plant of Laguna Verde fuel GE12 is used. The fuel GE14 presents displays with respect to the GE12, some improvements in the mechanical design and consequently in its performance generally. Between these improvements we can mention: 1. Spacers of high performance. 2. Shielding with barrier. 3. Filter for sweepings {sup d}ebris{sup a}nd 4. Fuel rods of minor partial length. The management of nuclear power plants has decided to introduce the use of fuel GE14 in Laguna Verde in the reload 14 for Unit 1 and of the reload 10 for Unit 2. The process of new introduction fuel GE14 consists of two stages, first consists on subjecting the one new design of fuel to the regulator organism in the USA: Nuclear Regulatory Commission, in Mexico the design must be analyzed and authorized by the National Commission of Nuclear Safety and Safeguards, for its approval of generic form, by means of the demonstration of the fulfillment with the amendment 22 of GESTAR II, the second stage includes the specific analyses of plant to justify the use of the new fuel design in a reload core. The nuclear plant of Laguna Verde would use some of the results of the security analyses that have been realized for the project of extended increase of power with fuel GE14, to document the specific analyses of plant with the new fuel design. The result of the analyses indicates that the reload lots are increased of 116-120 assemblies in present conditions (2027 MWt) to 140-148 assemblies in conditions of extended increase of power (2317 MWt

  14. Analysis of internal events for the Unit 1 of the Laguna Verde nuclear power station; Analisis de eventos internos para la Unidad 1 de la Central Nucleolelectrica de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Huerta B, A.; Aguilar T, O.; Nunez C, A.; Lopez M, R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, 03000 Mexico D.F. (Mexico)

    1993-07-01

    This volume presents the results of the starter event analysis and the event tree analysis for the Unit 1 of the Laguna Verde nuclear power station. The starter event analysis includes the identification of all those internal events which cause a disturbance to the normal operation of the power station and require mitigation. Those called external events stay beyond the reach of this study. For the analysis of the Laguna Verde power station eight transient categories were identified, three categories of loss of coolant accidents (LOCA) inside the container, a LOCA out of the primary container, as well as the vessel break. The event trees analysis involves the development of the possible accident sequences for each category of starter events. Events trees by systems for the different types of LOCA and for all the transients were constructed. It was constructed the event tree for the total loss of alternating current, which represents an extension of the event tree for the loss of external power transient. Also the event tree by systems for the anticipated transients without scram was developed (ATWS). The events trees for the accident sequences includes the sequences evaluation with vulnerable nucleus, that is to say those sequences in which it is had an adequate cooling of nucleus but the remoting systems of residual heat had failed. In order to model adequately the previous, headings were added to the event tree for developing the sequences until the point where be solved the nucleus state. This process includes: the determination of the failure pressure of the primary container, the evaluation of the environment generated in the reactor building as result of the container failure or cracked of itself, the determination of the localization of the components in the reactor building and the construction of boolean expressions to estimate the failure of the subordinated components to an severe environment. (Author)

  15. Visual interface for the automation of the instrumented pendulum of Charpy tests used in the surveillance program of reactors vessel of nuclear power plants; Interfase visual para la automatizacion del pendulo instrumentado de pruebas Charpy utilizado en el programa de vigilancia de la vasija de reactores de centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Rojas S, A.S.; Sainz M, E.; Ruiz E, J.A. [ININ, Carretera Mexico-Toluca Km.36.5, Mpio. de Ocoyoacac, Estado de Mexico (Mexico)]. E-mail: asrs@nuclear.inin.mx; esm@nuclear.inin.mx; jare@nuclear.inin.mx

    2004-07-01

    Inside the Programs of Surveillance of the nuclear power stations periodic information is required on the state that keep the materials with those that builds the vessel of the reactor. This information is obtained through some samples or test tubes that are introduced inside the core of the reactor and it is observed if its physical characteristics remain after having been subjected to the radiation changes and temperature. The rehearsal with the instrumented Charpy pendulum offers information on the behavior of fracture dynamics of a material. In the National Institute of Nuclear Research (ININ) it has an instrumented Charpy pendulum. The operation of this instrument is manual, having inconveniences to carry out rehearsals with radioactive material, handling of high and low temperatures, to fulfill the normative ones for the realization of the rehearsals, etc. In this work the development of a computational program is presented (virtual instrument), for the automation of the instrumented pendulum. The system has modules like: Card of data acquisition, signal processing, positioning system, tempered system, pneumatic system, compute programs like it is the visual interface for the operation of the instrumented Charpy pendulum and the acquisition of impact signals. This system shows that given the characteristics of the nuclear industry with radioactive environments, the virtual instrumentation and the automation of processes can contribute to diminish the risks to the personnel occupationally exposed. (Author)

  16. Methodology of aging management in structures, systems and components of a nuclear power plant and its application to a pilot program in Laguna Verde; Metodologia de la gestion del envejecimiento en estructuras, sistemas y componentes de una central nuclear y su aplicacion a un programa piloto en Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Jarvio C, G. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Fernandez S, G. [Comision Federal de Electricidad, Gerencia de Centrales Nucleoelectricas, Subgerencia de Ingenieria, Carretera Veracruz-Medellin Km. 7.5, Dos Bocas, 54270 Veracruz (Mexico)], e-mail: gfdezs@cfe.gob.mx

    2009-10-15

    From its origin the nuclear power plants confront the effects of time and of environment, giving as result the aging of its structures, systems and components. In this document the general process is described for the establishment of Aging Management Program developed by IAEA. Following the program methodology is guaranteed that a nuclear power plant manages the aging effects appropriately and to make decisions for its solution, assuring the characteristic functions of structures, systems and components of same nuclear power plant. On the other hand, the implantation of an aging management program constitutes the base for development of a licence renovation program, like it can be the specific case of the Central Laguna Verde Units 1 and 2. (Author)

  17. Technical economic feasibility study for the implementation of a nuclear power plant for the production of electricity in Colombia; Estudio de factibilidad tecnico economica para la implementacion de una central de energia nuclear para la produccion de energia electrica en Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Gonzales, David E.; Bolanos, Hernan G.; Mayorga, Manuel A.; Rodriguez, Edwin A., E-mail: david_egO@yahoo.es, E-mail: hernanbolaos@yahoo.com.ar, E-mail: alejo_mayorga@yahoo.com, E-mail: edwin.rodriguez@distoyota.com.co [Escuela Colombiana de Carreras Industriales (ECCI), Bogota (Colombia). Grupo de Investigacion GIATME

    2013-07-01

    A study on the technical and economic feasibility will be used to implement a nuclear power in Colombia to generate electricity. To this will be searched if there are previous studies on this topic and what they concluded. The manner in which power is supplied will be discussed in a national level nowadays, its strengths and weaknesses. It will be investigated the legal norms that exists in the country on nuclear power and renewable energy sources, the standards established at world level, the nuclear accidents and the great examples. Providers will be sought on the world market nuclear equipment which serve to this purpose and the technical characteristics of these equipment will be discussed. The type of fuel used in nuclear reactors, its origin, method of production, specifications, availability and long-term and safe handling and final disposal are considered. safe handling of this technology and policy or international rules that will studied.

  18. Еstablishing the Central Asian Nuclear-Weapon-Free Zone Is a Step Towards Global Nuclear Security

    Directory of Open Access Journals (Sweden)

    S. M. Adilkhodzhaeva

    2016-01-01

    Full Text Available The article is devoted to an actual problem of guaranteeing global security and promoting an idea of nuclear-free world. The article provides some data on the history of establishing, the key stages of formation and consolidation of international legal agreements of the Central Asian nuclear-weapon-free zone. The author considers peculiarities and distinguishing features of a nuclear-free zone in Central Asia.

  19. Radiological surveillance in Mexico, derived of the accident of the Fukushima Daiichi nuclear power plant; Vigilancia radiologica en Mexico, derivado del accidente en la central nuclear de Fukushima Daiichi

    Energy Technology Data Exchange (ETDEWEB)

    Aguirre G, J.; Nohpal J, X., E-mail: jaguirre@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Departamento de Vigilancia Radiologica, Dr. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2012-10-15

    March 11, 2011 an earthquake of 9.0 grades in the Richter scale, originated in the coast of Tohoku, Japan, in the Pacific Ocean gave origin to a tsunami that caused an accident in the Fukushima Daiichi nuclear power plant. Due to this accident, derived of the loss of the reactor cooling system, as well as of the prolonged absence of alternating and direct current, radiological protection actions were realized without being able to avoid the liberation of radioactive material to the atmosphere and ocean. The radiological impact of these liberations, not only in Japan but around the world, mainly in the north hemisphere of the Earth, was analyzed by means of environmental dose measurements and radionuclide concentrations in soil and water, among others. In the Mexico case, air samples data were obtained, as well as environmental dose celerity and full-length counts of the people coming from Japan near the disaster area. The present work contains the obtained results of the realized measurements in Mexico, same that have been used to make a summary and analysis of the dispersion in the environment in several countries of the world. (Author)

  20. Development of a severe accident module of a nuclear power plant based in the MELCOR nuclear code and its incorporation to the room simulator; Desarrollo del modulo de accidentes severos de una central nucleoelectrica basado en el codigo nuclear MELCOR y su incorporacion al simulador de aula

    Energy Technology Data Exchange (ETDEWEB)

    Cortes M, F.S.; Ramos P, J.C.; Nelson E, P.; Chavez M, C. [Facultad de Ingenieria, Division de Ingenieria Electrica, Grupo de Ingenieria Nuclear, UNAM, Ciudad Universitaria, Distrito Federal (Mexico)]. E-mail: samuelcortes@correo.unam.mx

    2004-07-01

    This work describes the development of the Severe Accidents Module (MAS) based on the Code MELCOR and its incorporation to the Simulator of Classroom of the Group of Nuclear Engineering of the Engineering Faculty (GrINFI) of the National Autonomous University of Mexico (UNAM). The module of Severe Accidents has the purpose of counting with installed and operational capacity for the simulation of accident sequences with capacitation purposes, training, analysis and design. A shallow description of SimAula is presented, and the philosophy used to obtain the interactive version of MELCOR are discussed, as well as its implementation in the atmosphere of SimAula. Finally, after confirming the correct operation of the development of the tool, some possible topics are discussed for specific applications of the MAS. (Author)

  1. Nuclear power in eastern and central Europe. Background paper

    International Nuclear Information System (INIS)

    The breakup of the former Soviet Union and other political changes in eastern and central Europe have opened up the area to closer scrutiny than was previously possible. Because of the accident at Chernobyl, nuclear power is one of the subjects that western nations have had a great deal of interest in exploring. The former Soviet Union designed and/or helped build more than 60 civilian reactors in the region. Most of these reactors follow one of two distinctly different designs: the VVER, or pressurized water reactor series; and the RBMK, which is a graphite-moderated, multi-channel reactor (the so-called Chernobyl type). In addition, there are two fast-breeder reactors and four graphite-moderated boiling water reactors for combined heat and power in operation in Russia. These last two designs are not widely distributed and so are not discussed in detail in this report. As noted above, the safety of Soviet-designed reactors has been of great concern around the world since the catastrophic events at Chernobyl in 1986. This paper will briefly describe the technology involved. It will also examine the main safety concerns, both technical and organizational, associated with each reactor type. In addition, the paper will review the nuclear power programs in the new countries emerging from the former Soviet Union and its satellites and discuss the international efforts underway to address the most pressing problems. (author). 1 tab

  2. Study of environmental noise in a BWR plant like the Nuclear Power Plant Laguna Verde; Estudio de ruido ambiental en una planta BWR como la Central Nuclear Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Tijerina S, F.; Cruz G, M.; Amador C, C., E-mail: francisco.tijerina@cfe.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Subgerencia de Ingenieria, Carretera Cardel-Nautla Km. 42.5, Alto Lucero, Veracruz (Mexico)

    2013-10-15

    In all industry type the health costs generated by the noise are high, because the noise can cause nuisance and to harm the capacity to work when causing tension and to perturb the concentration, and in more severe cases to reach to lose the sense of the hearing in the long term. The noise levels in the industry have been designated for the different types of use like residential, commercial, and industrial and silence areas. The noise can cause accidents when obstructing the communications and alarm signs. For this reason the noise should be controlled and mitigated, at a low level as reasonably is possible, taking into account that the noise is an acoustic contamination. The present study determines a bases line of the environmental noise levels in a nuclear power plant BWR-5 as Laguna Verde, (like reference) to be able to determine and to give pursuit to the possible solutions to eliminate or to limit the noise level in the different job areas. The noise levels were registered with a meter of integrative noise level (sonometer) and areas of noise exposure levels mapping the general areas in the buildings were established, being the registered maximum level of 96.94 dba in the building of the Reactor-elevation 0.65 m under the operation conditions of Extended Power Up rate (EPU) of 120% PTN. Knowing that the exposition to noises and the noise dose in the job place can influence in the health and in the safety of the workers, are extensive topics that they should be analyzed for separate as they are: to) the effects in the health of the exposure to the noise, b) how measuring the noise, c) the methods and technologies to combat and to control the noise in the industry by part of engineering area and d) the function of the industrial safety bodies as delegates of the health and safety in the task against the noise in the job. (author)

  3. International Conference Nuclear Energy in Central Europe 99, V. 1. Proceedings

    International Nuclear Information System (INIS)

    International Conference Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 101 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region. Topics are: Reactor Physics, Research Reactors, Thermal Hydraulics, Structural Analysis, Probabilistic Safety Assessment, Severe Accidents, NPP Operation, Nuclear Energy and Public, Radioactive Waste, Radiological Protection and Environmental Issues, Nuclear Methods and Monte Carlo and Deterministic Transport Calculations

  4. Quality studies of the energy in the electric net of the gathering warehouse of reusable parts and contaminate oils of the nuclear power plant Laguna Verde; Estudios de calidad de la energia en la red electrica del almacen de acopio de partes reusables y aceites contaminados (CCAC) de la Central Nuclear Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Tijerina S, F.; Vargas A, A.; Cardenas J, J., E-mail: francisco.tijerina@cfe.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Subgerencia de Ingenieria, Carretera Cardel-Nautla Km 42.5, Veracruz (Mexico)

    2012-10-15

    In the industry exist the high costs by faults of electronic and electric equipment s, due to during the design process, installation, tests and operation of these equipment s, is not had appropriate detection equipment to carry out quality studies of the energy. These studies give an important support to know that occurs in an electric net, the cause of the anomalous behavior of the equipment s and this way to avoid the expensive faults carrying out necessary engineering adaptations in an electric net. The elements of the electricity that are determined are the tension, current and frequency that are inside acceptable operational parameters that facilitate the operation and constant operation of the equipment s, free of interruptions and failures. The application of the quality studies of the energy is growing little by little in Mexico for the problems solution in the equipment s. This field is also developing new techniques and technologies integrated in the equipment s for its monitoring detection and protection. The present work offers the results of the first Quality Study of the Energy in the nuclear power plant of Laguna Verde to solve the problem in the gathering warehouse of reusable parts and contaminate oils, in which the failure of the two radiation monitors of the gassy effluent of ventilation HVAC of the warehouse took place. (Author)

  5. Risco, simbolização e mito: o caso da possível construção de uma central nuclear em Portugal (2005-2006)

    OpenAIRE

    Graça, Inês Lampreia de Oliveira

    2008-01-01

    Mestrado em Comunicação, Cultura e Tecnologias da Informação A presente dissertação tem como principal objectivo aceder à discursividade simbólica do risco associado à energia nuclear. Num primeiro capítulo elaboramos uma proposta teórica do conceito de risco tecnológico, tentando delimitar alguns dos seus elementos mais importantes salientados por diversos autores. Na sequência deste capítulo, tomando como premissa que a imprensa desempenha um papel fundamental na circulação d...

  6. Evaluation of the transfer of {sup 3}H rain to fungi into two areas, near and far from the Almaraz Nuclear Power Plant; Evaluacion de la transferencia del {sup 3}H de la lluvia a los hongos en dos zonas, proxima y alejada de la central nuclear de Almaraz

    Energy Technology Data Exchange (ETDEWEB)

    Baeza, A.; Garcia, E.; Riesgo, R.; Rodriguez, A.; Guillen, J.

    2013-07-01

    The main objective of this work has been to study for two years the incorporation of 3H atmospheric from rainwater to several species of fungi collected in two ecosystems, one in the vicinity of the Almaraz Nuclear Power Plant and one away from it. (Author)

  7. Report on the control of the safety and security of nuclear facilities. Part 2: the reconversion of military plutonium stocks. The use of the helps given to central and eastern Europe countries and to the new independent states; Rapport sur le controle de la surete et de la securite des installations nucleaires. Deuxieme partie: la reconversion des stocks de plutonium militaire. L'utilisation des aides accordees aux pays d'Europe centrale et orientale et aux nouveaux etats independants

    Energy Technology Data Exchange (ETDEWEB)

    Birraux, C

    2002-07-01

    This report deals with two different aspects of the safety and security of nuclear facilities. The first aspect concerns the reconversion of weapon grade plutonium stocks: the plutonium in excess, plutonium hazards and nuclear fuel potentialities, the US program, the Russian program, the actions of European countries (France, Germany), the intervention of other countries, the unanswered questions (political aspects, uncertainties), the solutions of the future (improvement of reactors, the helium-cooled high temperature reactor technology (gas-turbine modular helium reactor: GT-MHR), the Carlo Rubbia's project). The second aspect concerns the actions carried out by the European Union in favor of the civil nuclear facilities of central and eastern Europe: the European Union competencies through the Euratom treaty, the conclusions of the European audit office about the PHARE and TACIS nuclear programs, the status of committed actions, the coming planned actions, and the critical analysis of the policy adopted so far. (J.S.)

  8. De-centralized and centralized control for realistic EMS Maglev systems

    Science.gov (United States)

    Moawad, Mohamed M. Aly M.

    A comparative study of de-centralized and centralized controllers when used with real EMS Maglev Systems is introduced. This comparison is divided into two parts. Part I is concerned with numerical simulation and experimental testing on a two ton six-magnet EMS Maglev vehicle. Levitation and lateral control with these controllers individually and when including flux feedback control in combination with these controllers to enhance stability are introduced. The centralized controller is better than the de-centralized one when the system is exposed to a lateral disturbing force such as wind gusts. The flux feedback control when combined with de-centralized or centralized controllers does improve the stability and is more resistant and robust with respect to the air gap variations. Part II is concerned with the study of Maglev vehicle-girder dynamic interaction system and the comparison between these two controllers on this typical system based on performance and ride quality achieved. Numerical simulations of the ODU EMS Maglev vehicle interacting with girder are conducted with these two different controllers. The de-centralized and centralized control for EMS Maglev systems that interact with a flexible girder provides similar ride quality. Centralized control with flux feedback could be the best controller for the ODU Maglev system when operating on girder. The centralized control will guarantee the suppression of the undesired lateral displacements; hence it will provide smoother ride quality. Flux feedback will suppress air gap variations due to the track discontinuities.

  9. Estudio termodinámico del tanque de almacenamiento de sales en una central termosolar

    OpenAIRE

    Durán Vicente, Rubén

    2014-01-01

    El proyecto realizado se centra en el estudio del sistema de almacenamiento de energía en forma de calor por medio de dos tanques de sales solares fundidas, todo ello aplicado a una planta termosolar de receptor central. La central diseñada se ha ubicado en las Islas Canarias (España), concretamente se ha seleccionado como la ubicación idónea la Isla de Fuerteventura por tres motivos: gran cantidad de radiación solar directa, las características de su parque de generación de energía eléctrica...

  10. Calculation of the pipes failure probability of the Rcic system of a nuclear power station by means of software WinPRAISE 07; Calculo de la probabilidad de falla de tuberias del sistema RCIC de una central nuclear mediante el software WinPRAISE 07

    Energy Technology Data Exchange (ETDEWEB)

    Jasso G, J.; Diaz S, A.; Mendoza G, G.; Sainz M, E. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Garcia de la C, F. M., E-mail: angeles.diaz@inin.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Km 44.5 Carretera Cardel-Nautla, 91476 Laguna Verde, Alto Lucero, Veracruz (Mexico)

    2014-10-15

    The growth and the cracks propagation by fatigue are a typical degradation mechanism that is presented in the nuclear industry as in the conventional industry; the unstable propagation of a crack can cause the catastrophic failure of a metallic component even with high ductility; for this reason, activities of programmed maintenance have been established in the industry using inspection and visual techniques and/or ultrasound with an established periodicity allowing to follow up to these growths, controlling the undesirable effects; however, these activities increase the operation costs; and in the peculiar case of the nuclear industry, they increase the radiation exposure to the participant personnel. The use of mathematical processes that integrate concepts of uncertainty, material properties and the probability associated to the inspection results, has been constituted as a powerful tool of evaluation of the component reliability, reducing costs and exposure levels. In this work the evaluation of the failure probability by cracks growth preexisting by fatigue is presented, in pipes of a Reactor Core Isolation Cooling system (Rcic) in a nuclear power station. The software WinPRAISE 07 (Piping Reliability Analysis Including Seismic Events) was used supported in the probabilistic fracture mechanics principles. The obtained values of failure probability evidenced a good behavior of the analyzed pipes with a maximum order of 1.0 E-6, therefore is concluded that the performance of the lines of these pipes is reliable even extrapolating the calculations at 10, 20, 30 and 40 years of service. (Author)

  11. Critérios de estabilidade atmosférica para a região da Central Nuclear Almirante Álvaro Alberto, Angra dos Reis - RJ Criteria of atmospheric stability for the region around the nuclear power plant Almirante Álvaro Alberto, Angra dos Reis - RJ

    Directory of Open Access Journals (Sweden)

    José Francisco De Oliveira Júnior

    2010-06-01

    Full Text Available Realizaram-se avaliações climatológicas, sazonais e diárias, da estabilidade atmosférica na região da Central Nuclear Almirante Álvaro Alberto (CNAAA, Angra dos Reis - RJ. A climatológica foi baseada no critério de Pasquill-Gifford (P-G para um período de 26 anos (1980-2006 e a sazonal-diária pelos números de Richardson Global (RiB e de Froude (Fr - estudo de caso (2002-05. O Fr foi usado na caracterização do escoamento da região. O critério de P-G mostrou que as classes predominantes foram D, E e F (no período noturno e diurno. Avaliaram-se as classes predominantes com a direção e velocidade do vento, os setores mais freqüentes foram S, SSW, SSE no período diurno e N, NNE, NNW e E no noturno. Quanto à velocidade verificou-se que a classe D foi mais veloz, e as classes E e F menos velozes, em qualquer período. As maiores velocidades foram coincidentes com a brisa marítima. Baseado no RiB, a condição estaticamente estável prevaleceu em comparação às demais, sendo de 79%, seguida da instável (17% e neutra (4%. O Fr indicou que o escoamento na CNAAA foi caracterizado por regime de vento fraco, com forte estabilidade e ar estagnado. A maior parte das ocorrências (63% foi para Fr inferior a 0,1, seguida de poucas ocorrências nas categorias Fr igual a 1,0 (8% e superior a 1,7 (12%. Os critérios utilizados na caracterização da estabilidade na região e na análise do regime de escoamento indicaram a baixa capacidade da atmosfera para a dispersão de poluentes, devido à predominância da condição estável e do regime de bloqueio.The atmospheric stability over the nuclear power plant Almirante Álvaro Alberto (CNAAA, Angra dos Reis - RJ, Brazil, was analyzed at climatological, seasonal, and daily scales. The climatologic analysis was based on the Pasquill-Gifford (P-G for a long-term series of 26 years (1980 - 2006, while the seasonal/daily was performed using the Global Richardson number, RiB, and the Froude number

  12. Reactivity follow of the two first loadings of the Jose Cabrera Reactor; Seguimiento de la ractividad durante las dos primeras cargas del Reactor de la Central Nuclear Jose Cabrera

    Energy Technology Data Exchange (ETDEWEB)

    Bru, A.

    1975-07-01

    In this paper the first two cores together with the in-core measurements taken during the operation of the Nuclear Power Station Jose Cabrera are described. The results of this measurements have been processed with the INCORE and FOLLOW codes. The peaking factors and the boron concentration versus burn-up are displayed. The final burn-up of the fuel elements in these two loading are given, too. (Author)

  13. Proceedings of the International Conference Nuclear Energy in Central Europe 2001

    International Nuclear Information System (INIS)

    International Conference Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The proceedings contain 98 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region. Topics are: reactor physics, thermal hydraulics, probabilistic safety assessment (PSA) and severe accidents, nuclear materials, NPP and research reactor operation, environmental issues and radiation measurement, fusion, radioactive waste and regulatory issues and public relations

  14. Inter-comparison of radiation protection organization and practices in foreign nuclear power stations. Report nr 304; Intercomparaison de l'organisation et des pratiques de radioprotection dans des centrales nucleaires etrangeres. Rapport no. 304

    Energy Technology Data Exchange (ETDEWEB)

    Drouet, F.; Crouail, P.; D' Ascenzo, L.; Lefaure, C.; Vaillant, L.

    2007-02-15

    This report is notably based on visits performed in eight foreign nuclear power stations (in Spain, Belgium, Sweden, United Kingdom, United States, Switzerland) and a questionnaire on radiation protection, primary circuit chemistry, maintenance, planning, intervener training (subcontractors included), and factors explaining exposure evolutions. This report proposes a synthesis of these visits and surveys. It addresses the radiation protection management in the power station, actions undertaken with respect to dose rates, actions undertaken with respect to exposed work volumes, and contributions of remote data monitoring technologies

  15. Problemas centrales del análisis de datos cualitativos

    Directory of Open Access Journals (Sweden)

    Julio Mejía Navarrete

    2011-04-01

    Full Text Available El trabajo examina las operaciones prácticas y las decisiones concretas que enfrenta el trabajo de investigación cualitativa en la etapa del análisis de datos. Interesa subrayar los aspectos centrales del análisis de datos cualitativos que posibiliten abrir una discusión en la investigación metodológica de América Latina

  16. New application computer control comprehensive radiological and dosimetry of the Cofrentes nuclear power station and its integration with environment of photo realism; Nueva aplicacion informatica de control integral radiologico y dosimetrico de la central nuclear de Cofrentes y su integracion con entorno de fotorealismo

    Energy Technology Data Exchange (ETDEWEB)

    Fragio, R.; Garcia Vidal, P.; Sollet, E.; Campos, J. J. de; Martinez Avila, M.; Llana, S. de la

    2013-09-01

    At the beginning of 2012, a new integrated information system (AGER) replaced the former software applications that supported the radiation protection service (RPS) in Cofrentes Nuclear Plant. After a deep analysis coordinated by the RPS, the Cofrentes systems IT unit and Everis company, a software solution was designed and developed using the latest IT technologies in order to increase reliability, security, scalability and usability. Furthermore, the system provides new functions that covered recently imposed requirements by official organisms and also many improvements required by the RPS in order to better monitor the individual and collective doses: ALARA Jobs management, alarms for radiation dose accumulations, monitoring of dose estimates in RWPs, integration with a photo realistic model of plant, etc. (Author)

  17. Development of an interactive model of the Laguna Verde nuclear power plant based on the RELAP/SCDAP code; Desarrollo del modelo interactivo de la central nucleoelectrica de Laguna Verde basado en el codigo RELAP/SCDAP

    Energy Technology Data Exchange (ETDEWEB)

    Salazar C, J.H.; Ramos P, J.C.; Salazar S, E.; Chavez M, C. [LAIRN, FI-UNAM, DEPFI Campus Morelos, Jiutepec, Morelos (Mexico)]. e-mail: cchavez2@cableonline.com.mx

    2003-07-01

    The present work describes the development of an interactive model of the Nuclear power plant of Laguna Verde (CNLV) based on the RELAP/SCDAP nuclear code, and it incorporation to a classroom simulator. The functional prototype it allows to make evaluations for operational transients and postulates accidents, with capacitation purposes, training, analysis and design. It emphasizes on the methodology used to establish the inter activity. Such methodology, is based on a modular structure in the one that multiple processes can be executed in an independent way and where the generated information is stored in segments of shared memory (characteristic that allows the UNIX operating system) and sent to the different processes by means of communication routines developed in C programming language. The utility of the system is demonstrated by means of the use of interactive display graphics (mimic diagrams, pictorials and tendency graphics) for the simultaneous dynamic visualization of the variables more significant that involve to the pattern of a transitory event type (for example failure of the controller of feeding water in a BWR reactor). Near with the interactive module, it was developed a model of the reactor of the CNLV for the code of better estimation RELAP/SCDAP. Finally the evaluation of the model is described, where it is interpreted in general form the behavior of those main variables that describe the stationary state, corroborating that follow the same tendency that those reported in the FSAR (Final Safety Analysis Report) of the Laguna Verde plant. The obtained results allow to conclude that the made development was satisfactory and that it presents enormous advantages regarding the capacity and time of analysis when using tools of visualization in real time of execution. (Author)

  18. Proyecto ejecutivo de las instalaciones eléctricas de una central de telecomunicaciones situada en el polígono Pedrosa de l'Hospitalet de Llobregat

    OpenAIRE

    Ribas Galiot, Albert

    2000-01-01

    El presente proyecto es la especificación de las características técnicas y de ejecución de la infraestructura eléctrica completa de una nueva Central de telecomunicaciones, de un operador global de telecomunicaciones, para su posterior puesta en servicio en L’Hospitalet de Llobregat.

  19. Evaluation of radwaste minimization program of dry and wet active waste in the Laguna Verde Nuclear Power Plant; Evolucion del programa de minimizacion de desechos solidos secos y humedos en la Central Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Luna-Garza, Hector [Comision Federal de Electricidad, Veracruz (Mexico). Central Nucleoeletrica Laguna Verde; Zarate-Montoya, Norma [Instituto Nacional de Investigaciones Nucleares, Veracruz (Mexico)

    2001-07-01

    A growing rate of radwaste volume production combined with an increase of both, costs and associated dose involved in its treatment and disposition processes have created a serious problem to the Laguna Verde Nuclear Power Plant (BWR, two Units, 682 Mwe each) in Mexico. Due the lack of a Final Repository in the country, the solution in the short or long terms relies on the success of a continuous and aggressive minimization program mainly based on modifications and upgrades applied to these processes. Technical and administrative strategies adopted by LVNPP for the reduction of Liquid Effluents and Dry and Wet Active Waste in the next three years are described. Based on the results of the LVNPP current radwaste process systems, an estimated accumulation of 11,502 m{sup 3} by the year 2035 will exceed the actual on-site storage capacity. If the strategies succeed, this production would fall to an expected manageable volume of 4067 m{sup 3}. (author)

  20. Decision no. 2011-DC-0224 of the French nuclear safety authority from May 5, 2011, ordering the French atomic energy and alternative energies commission (CEA) to proceed to a complementary safety evaluation of some of its basic nuclear facilities in the eyes of the Fukushima Daiichi nuclear power plant accident; Decision no. 2011-DC-0224 de l'Autorite de surete nucleaire du 5 mai 2011 prescrivant au Commissariat a l'Energie Atomique et aux energies alternatives (CEA) de proceder a une evaluation complementaire de la surete de certaines de ses installations nucleaires de base au regard de l'accident survenu a la centrale nucleaire de Fukushima Daiichi

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    As a consequence of the accident of the Fukushima Daiichi nuclear power plant (Japan), the French Prime Minister entrusted the French nuclear safety authority (ASN) with the mission to carry out a safety analysis re-evaluation of the French nuclear facilities, and in particular the nuclear power plants. A decision has been addressed by the ASN to each nuclear operator with the specifications of this safety re-evaluation analysis and the list of facilities in concern. This document is the decision addressed to the French atomic energy commission (CEA). (J.S.)

  1. Centrales térmicas a pie de mina

    Directory of Open Access Journals (Sweden)

    Seshadri, B.

    1961-10-01

    Full Text Available Ligera descripción de la gran cuenca hullera de carbón pardo, de Victoria (Australia. Esta inmensa cuenca carbonífera está situada a unos 150 km de Melbourne, estado de Victoria, y en la región denominada el Valle del río Latrobe. Se cree que esta cuenca es la mayor del mundo en su género. Estos yacimientos se extienden en una longitud de unos 65 km y una anchura que varía de 8 a 16 km. En un cierto lugar de esta zona, y a unos 27 m de profundidad, se ha perforado una capa de unos 330 m de potencia, lo que, innegablemente, hace de ella la mayor del mundo. Al crearse en 1919 la Comisión Nacional de Electricidad, se previó la construcción de la primera Central a pie de mina para el año 1923, con una capacidad inicial de 50.000 kW de potencia.

  2. Revision of documents guide to obtain the renovation of licence of the nuclear power plant of Laguna Verde, Units I and II; Revision de documentos guia para obtener la renovacion de licencia de la Central Nuclear Laguna Verde Unidades 1 and 2

    Energy Technology Data Exchange (ETDEWEB)

    Jarvio C, G. [ININ 52750 La Marquesa, Estado de Mexico (Mexico); Fernandez S, G. [CFE, Gerencia de Centrales Nucleoelectricas, Subgerencia de Ingenieria, Carretera Veracruz-Medellin s/n (Km. 7.5), Dos Bocas, 54270 Veracruz (Mexico)]. e-mail: giarvio@yahoo.com.mx

    2008-07-01

    Unquestionably the renovation of license of the nuclear power plants , it this converting in a promising option to be able to gather in sure, reliable form and economic those requests about future energy in the countries with facilities of this type. This work it analyzes four documents guide and their application for the determination of the renovation of it licenses in nuclear plants that will serve of base for their aplication in the Nuclear Power Plant of Laguna Verde Units I and 2. The four documents in question are: the one Inform Generic of Learned Lessons on the Aging (NUREG - 1801), the Standard Revision Plan for the Renovation of License (NUREG - 1800), the Regulatory Guide for Renovation of License (GR-1.188), and the NEI 95-10, developed by the Institute of Nuclear Energy that is an Industrial Guide to Implement the Requirements of the 1OCFR Part 54-the Rule of Renovation of It licenses. (Author)

  3. Evolution of central banking? De Nederlandsche Bank 1814-1852

    NARCIS (Netherlands)

    Uittenbogaard, R.A.

    2014-01-01

    Nowadays the role of central bank is unquestioned and nearly ubiquitous. But was this always the case? This thesis analyses how De Nederlandsche Bank (DNB) developed into a central bank during the first four decades of its existence. Its establishment in 1814 was the result of a combination of both

  4. Análisis de accidentes severos en contenciones nucleares

    Directory of Open Access Journals (Sweden)

    Goicolea Ruigómez, José María

    1992-04-01

    Full Text Available Analysis for severe accidents has recently been added to the long list of requisites imposed on nuclear power plants. In this work we study the rationale and justiflcation for this type of analysis. Calculations for the structural response of the containment buildings can be performed on the computer using advanced nonlinear Finite Element codes. A state of the art review of these methods is carried out, proposing a methodology based on analysis by numerical methods with experimental validation. Additionally we present some results obtained by the authors for the analysis of both reinforced concrete and steel containments. The concluding remarks show the validity of the proposed methodology, as well as the evidence of a large security margin in the containments, due mainly to the conservatisms in the design stage.

    El análisis frente a accidentes severos ha venido a añadirse recientemente a la larga lista de requisitos impuestos a las centrales nucleares. En este trabajo se pretende estudiar la problemática y justificación de este tipo de análisis. El cálculo de la respuesta de la contención se puede realizar en el ordenador mediante métodos avanzados de elementos finitos no lineales. Se hace una revisión del estado de la técnica en estos métodos, proponiendo una metodología basada en el análisis mediante modelos numéricos con validación experimental. Se presentan asimismo los resultados de análisis realizados, para contenciones tanto de hormigón armado como metálicas. Las conclusiones del trabajo establecen la validez de la metodología empleada, así como la constatación de un amplio margen de seguridad existente en las contenciones evaluadas, debido a los conservadurismos del proceso de diseño original.

  5. Aceitabilidade de um futuro banco de objetos simuladores para controle de qualidade em medicina nuclear

    OpenAIRE

    Fernanda Carla Lima Ferreira; Divanizia do Nascimento Souza

    2011-01-01

    OBJETIVO: O objetivo deste trabalho foi verificar a aceitabilidade para a implantação no Brasil de um banco de objetos simuladores nacional, ou bancos regionais, para uso compartilhado desses objetos em atividades de controle de qualidade nos serviços de medicina nuclear. MATERIAIS E MÉTODOS: Foram analisadas as respostas dadas em um questionário que foi enviado a supervisores de radioproteção e físicos médicos de serviços de medicina nuclear do Brasil. Inicialmente, o questionário foi valida...

  6. Micro-pollutant exchanges at the water-bryophyta interface: monitoring of the copper concentration in nuclear power plants; Echanges de micropolluants a l`interface eau-bryophytes: suivi de la concentration en cuivre dans les centrales nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Ciffroy, P.

    1994-12-31

    The purpose of this study is to calibrate and validate a descriptive model of the copper exchanges at the water-bryophyta interface. In theory, this model should allow calculation of the average concentrations of copper dissolved in water, using spot measurements on the bryophyta. The calibration procedure, based on mathematical use of laboratory data, demonstrated that the kinetic coefficients representing the processes of accumulation and release of the micro-pollutant by aquatic mosses, are effectively independent of the copper concentration in the water in contact with these latter, and that the reactional diagram proposed is thus well suited to representing exchanges at the water-bryophyta interface. The data collected during monitoring of the metal flows emitted by the nuclear power plants at Cattenom, Dampierre and Nogent/Seine enabled the validity of the model to be tested over a relatively large range of concentrations. The results obtained on the Cattenom and Dampierre sites would appear to be satisfactory: over the majority of control points selected, we noted good correlation between the measured and calculated concentrations of copper dissolved in water. In particular, the simulations run on periods of from 7 to 10 days show that the method is well suited to medium-term monitoring. On the other hand, the model proved inadequate for interpreting the measurements acquired during monitoring of releases from the Nogent/Seine plant set up for winter conditions. Consequently the dissolved copper estimates, calculated according to the model, considerably overestimate the actual values measured by atomic and absorption spectrometry and by voltametry. It would seem that these results can be attributed to a particular speciation of the copper on the site studied. Subsequent studies would seem necessary to confirm this point. (author). 5 refs., 10 figs., 10 tabs.

  7. Modeling of delayed strains of concrete under biaxial loadings. Application to the reactor containment of nuclear power plants; Modelisation des deformations differees du beton sous sollicitations biaxiales. application aux enceintes de confinement de batiments reacteurs des centrales nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Benboudjema, F

    2002-12-15

    The prediction of delayed strains is of crucial importance for durability and long-term serviceability of concrete structures (bridges, containment vessels of nuclear power plants, etc.). Indeed, creep and shrinkage cause cracking, losses of pre-stress and redistribution of stresses, and also, rarely, the ruin of the structure. The objective of this work is to develop numerical tools, able to predict the long-term behavior of concrete structures. Thus, a new hydro mechanical model is developed, including the description of drying, shrinkage, creep and cracking phenomena for concrete as a non-saturated porous medium. The modeling of drying shrinkage is based on an unified approach of creep and shrinkage. Basic and drying creep models are based on relevant chemo-physical mechanisms, which occur at different scales of the cement paste. The basic creep is explicitly related to the micro-diffusion of the adsorbed water between inter-hydrates and intra-hydrates and the capillary pores, and the sliding of the C-S-H gel at the nano-porosity level. The drying creep is induced by the micro-diffusion of the adsorbed water at different scales of the porosity, under the simultaneous effects of drying and mechanical loadings. Drying shrinkage is, therefore, assumed to result from the elastic and delayed response of the solid skeleton, submitted to both capillary and disjoining pressures. Furthermore, the cracking behavior of concrete is described by an orthotropic elastoplastic damage model. The coupling between all these phenomena is performed by using effective stresses which account for both external applied stresses and pore pressures. This model has been incorporated into a finite element code. The analysis of the long-term behavior is also performed on concrete specimens and prestressed concrete structures submitted to simultaneous drying and mechanical loadings. (author)

  8. Computer Security for Commercial Nuclear Power Plants - Literature Review for Korea Hydro Nuclear Power Central Research Institute

    Energy Technology Data Exchange (ETDEWEB)

    Duran, Felicia Angelica [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Security Systems Analysis Dept.; Waymire, Russell L. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Security Systems Analysis Dept.

    2013-10-01

    Sandia National Laboratories (SNL) is providing training and consultation activities on security planning and design for the Korea Hydro and Nuclear Power Central Research Institute (KHNPCRI). As part of this effort, SNL performed a literature review on computer security requirements, guidance and best practices that are applicable to an advanced nuclear power plant. This report documents the review of reports generated by SNL and other organizations [U.S. Nuclear Regulatory Commission, Nuclear Energy Institute, and International Atomic Energy Agency] related to protection of information technology resources, primarily digital controls and computer resources and their data networks. Copies of the key documents have also been provided to KHNP-CRI.

  9. Liderazgo potenciador y desempeño de seguridad percibido en la industria nuclear : factores psicosociales intervinientes

    OpenAIRE

    Martínez Córcoles, Mario

    2013-01-01

    Desde los inicios de la industria nuclear, la necesidad de asegurar altos estándares de seguridad ha sido inherente a cualquier desafío y/o cambio que el sector ha tenido que afrontar. Sin embargo, especialmente hoy en día se ve completamente una nueva era en el sector energético con desafíos y demandas económicas emergentes que ponen en jaque el proporcionar un alto nivel de seguridad en cada una de las centrales nucleares de todo el mundo. Dichos desafíos son principalmente debidos a las c...

  10. Scenarios simulation of severe accident type small loss of coolant (Loca), with the code MELCOR version 2.1 for the nuclear power plant of Laguna Verde; Simulacion de escenarios de accidente severo tipo perdida de refrigerante (Loca) pequeno, con el codigo MELCOR version 2.1 para la central nucleo-electrica de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Cardenas V, J.; Mugica R, C. A.; Godinez S, V., E-mail: Jaime.cardenas@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Jose Ma. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2013-10-15

    In this work was carried out the analysis of two scenarios of the accident type with loss of coolant in a recirculation loop for a break with smaller ares to 0.1 ft{sup 2} (4.6 cm{sup 2}), which is classified according to their size like small Loca. The first simulated scenario was a small Loca without action of the emergency coolant injection systems, and the second was a small Loca with only the available system LPCS. This design base accident was taken into account for its relevance with regard to the damage to the core and the hydrogen generation. Was also observed and analyzed the response of the action of the ECCS that depend of the loss of coolant reason and this in turn depends of the size and type of the pipe break. The specified scenarios were simulated by means of the use of MELCOR model for the nuclear power plant of Laguna Verde that has the Comision Nacional de Seguridad Nuclear y Salvaguardias. (Author)

  11. Les Schlumberger de l’École centrale

    OpenAIRE

    Hau, Michel; Stoskopf, Nicolas

    2010-01-01

    International audience La famille Schlumberger inaugure dès le milieu du XIXe siècle une tradition alsacienne de patrons ingénieurs dotés d’une formation scientifique et technique de haut niveau. L’itinéraire des onze Schlumberger sortis de l’Ecole centrale des arts et manufactures est ici décrit et replacé dans son contexte historique et familial.

  12. US central station nuclear electric generating units: significant milestones

    International Nuclear Information System (INIS)

    Listings of US nuclear power plants include significant dates, reactor type, owners, and net generating capacity. Listings are made by state, region, and utility. Tabulations of status, schedules, and orders are also presented

  13. Collective phenomena in non-central nuclear collisions

    Energy Technology Data Exchange (ETDEWEB)

    Voloshin, Sergei A.; Poskanzer, Arthur M.; Snellings, Raimond

    2008-10-20

    Recent developments in the field of anisotropic flow in nuclear collision are reviewed. The results from the top AGS energy to the top RHIC energy are discussed with emphasis on techniques, interpretation, and uncertainties in the measurements.

  14. Central solar fotovoltaica de 5 MW con sistema de posicionamiento autónomo

    OpenAIRE

    Martínez Porras, Abel

    2010-01-01

    El objeto del proyecto realizado es el diseño de una central solar fotovoltaica (huerta solar) con sistema de posicionamiento autónomo de 5 MW de potencia nominal (5.796 MWp potencia de pico) con todos los elementos necesarios para la puesta en funcionamiento del parque fotovoltaico, desde la configuración fotovoltaica, la instalación eléctrica, etc. En un solar de uso rustico en el término municipal de L’Ametlla de Mar, al sur de Tarragona. La finalidad de la huerta solar e...

  15. Isolated Richter's syndrome in central nervous system: case report Sindrome de Richter isolada em sistema nervoso central: relato de caso

    Directory of Open Access Journals (Sweden)

    Lucilene S.R. Resende

    2005-06-01

    Full Text Available Diffuse large cell non Hodgkin's lymphoma associated with chronic lymphoid leukemia (CLL, or Richter's syndrome, is a rare and serious complication. Isolated Richter's syndrome in the central nervous system is very rare; only 12 cases have been reported. We describe a 74-year-old patient with diffuse large cell non Hodgkin's lymphoma in the right frontal region with the appearance of multiform glioblastoma.Linfoma não Hodgkin difuso de grandes células em paciente portador de leucemia linfóide crônica (LLC, ou síndrome de Richter, é complicação rara e grave nesta leucemia. Síndrome de Richter isolada no sistema nervoso central é muito rara, tendo sido encontrados apenas 12 casos descritos. Descrevemos paciente de 74 anos, que apresentou linfoma não Hodgkin difuso de grandes células em região frontal direita, simulando glioblastoma multiforme.

  16. Forma central da moléstia nervosa de Recklinghausen

    Directory of Open Access Journals (Sweden)

    L. C. Mattosinho França

    1958-06-01

    Full Text Available Os autores apresentam uma sistematização das lesões que podem ser encontradas na moléstia de Recklinghausen. Foram observados 4 casos de forma nervosa central da moléstia. Em todos existiam tumores bilaterais nos ângulos pontocerebelares, constituindo uma das manifestações mais importantes da doença, sendo mesmo a única em um dos casos (forma central pura. Nos demais, portadores de formas mistas, além de outras lesões centrais (neurofibromas, meningeomas, ninhos de células atípicas, havia lesões periféricas discretas. Tumores intrarraquidianos originados nas bainhas radiculares foram os causadores da sintomatologia inicial em 3 pacientes. Em dois casos em que o córtex foi examinado histológicamente, foram encontrados ninhos de células gliais atípicas, característicos da forma central da neurofibromatose. Duas lesões relativamente raras foram encontradas no segundo caso: angioma cortical e neurite intersticial hipertrófica do plexo braquial. Em pacientes portadores de neurofibromatose periférica ou raquídea, como também em seus familiares, devem ser sempre procuradas lesões centrais, principalmente tumores do nervo acústico. O exame neuro-radiológico de escolha para confirmar o diagnóstico dêstes tumores é a iodoventriculografia.

  17. Dynamic analysis of the condensate and of the feed water in the Laguna Verde nuclear power station; Analisis dinamico del sistema de condensado y agua de alimentacion de la nucleoelectrica de Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Macedo Muth, Javier; Sandoval Pena, Ramon [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1988-12-31

    This article shows a non-lineal mathematical model for the condensate, and feed water systems and for feed water heater drains at the Laguna Verde Nuclear Power Station for its simulation in real time. The model allows the calculation of flows and pressures in all the piping system and equipment that integrate the systems. It was obtained by using the force unbalance in the fluid concept and is capable of reproducing its dynamic behavior through variations induced by the different operation modes and more common failures. The final model objective is to form part of the Laguna Verde simulator that will be used for operator training of this Nuclear Power Plant. [Espanol] En este articulo se muestra un modelo matematico no lineal de los sistemas de condensado, agua de alimentacion y drenes de calentadores de la central nuclear de Laguna Verde para su simulacion en tiempo real. El modelo permite calcular los flujos y las presiones en toda la red de tuberias y equipos que integran los sistemas. Se obtuvo utilizando el concepto de desbalance de fuerzas en el fluido, y es capaz de reproducir su comportamiento dinamico ante variaciones inducidas por los diversos modos de operacion y fallas mas comunes. El objetivo final del modelo es formar parte del simulador de Laguna Verde que se empleara para el adiestramiento de los operadores de dicha central nuclear.

  18. Proyecto de una central eléctrica de biomasa

    OpenAIRE

    Valentín Botija, Sergio

    2011-01-01

    El presente Proyecto de fin de carrera pretende dar una respuesta técnica a la necesidad de abastecimiento e independencia energética mediante una solución basada en las energías renovables y en combustibles vegetales, en concreto aquella basada en la biomasa; así como profundizar en el conocimiento de las mismas y realizar un estudio de viabilidad de estas técnicas en una zona determinada de Castilla-La Mancha. De modo, que mediante este PFC se trata de analizar la viabilidad técnica y econó...

  19. The Staffing of Central Electricity Generating Board Nuclear Power Stations

    International Nuclear Information System (INIS)

    An account is given of the staffing requirements and organization at a CEBG nuclear power station. The training of staff and licensing requirements for reactoroperating staff are discussed. Experience gained to data of the outcome of pre-operating training and detailed planning in the operational sphere is given. (author)

  20. The impulse influence function for de-centralized control

    Institute of Scientific and Technical Information of China (English)

    ZHONG; Wanxie

    2004-01-01

    Impulse influence matrix function is introduced based on that the de-centralized control analysis is analogous to the sub-structural analysis in structural mechanics. The static sub-structural analysis is analogous to the usual de-centralized control, whereas the dynamic sub-structural analysis corresponds to the de-centralized control theory. The reciprocal symmetry for the impulse influence matrix function is proved, and is solved by the precise integration method for time invariant system, giving the results up to computer precision. Based on the impulse influence functions of subsystems, the combination of subsystems can lead to a set of integral equations and be solved numerically. Numerical example demonstrates the effectiveness of the method.

  1. Themes in nuclear law; Temas de Derecho Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The nuclear law was analyzed during a workshop. The main aspects were: the law of population to access to information on nuclear energy and the relationship between the Regulator Organism and the nuclear power plants managers.

  2. Management report 2003 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2003 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-03-15

    This document reports the general activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2003, involving the government programs in the areas of nuclear safety, medicine application, technological development, administration and miscellaneous.

  3. Los mamíferos marinos en la costa central de Oaxaca Marine mammals along the central coast of Oaxaca

    OpenAIRE

    Juan Meraz; Víctor Manuel Sánchez-Díaz

    2008-01-01

    Con la finalidad de conocer las especies de mamíferos marinos que se encuentran en la costa central de Oaxaca, se elaboró un listado comentando las características de los registros obtenidos. Se incluyeron las observaciones hechas a lo largo de 30 recorridos por mar, entre junio de 1999 y enero de 2004, realizadas entre las bahías de Huatulco y la playa de La Escobilla. Adicionalmente se incluyeron registros de animales varados, así como observaciones realizadas desde la costa. Se presentan c...

  4. Coordinated control of a combined cycle thermoelectric central; Control coordinado de una central termoelectrica de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Parra, Marino; Castelo Cuevas, Luis [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-03-01

    In this paper the coordinated control (CC) of the Distributed Control System (Sistema de Control Distribuido) (SICODI) of the Combined Cycle Central of Gomez Palacio, Durango, is presented. The description of the control scheme and its realization in software is made. From the scheme the operation strategies and automation, supervision and control are described in detail. The software components of the programming are described, the program structure and control data and its implementation in working stations VAX 3100 under the operating system VMS (Virtual Memory System), are described. [Espanol] En este articulo se presenta el control coordinado (CC) del Sistema de Control Distribuido (Sicodi) de la central de ciclo combinado Gomez Palacio, Durango. Se describe el esquema de control y su realizacion en software. Del esquema se detallan las estrategias de operacion y automatizacion, supervision y control. Del software se describen los componentes de la programacion, la estructura de programas y datos del control y su implementacion en estaciones de trabajo VAX 3100 bajo el sistema operativo VMS (Virtual Memory System).

  5. Super compacting of drums with dry solid radioactive waste in the nuclear power plant of Laguna Verde;Super compactacion de bidones con desecho radiactivo solido seco en la central nucleo electrica Laguna Verde

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez G, R.; Lara H, M. A.; Cabrera Ll, M.; Verdalet de la Torre, O., E-mail: marco.lara@cfe.gob.m [Comision Federal de Electricidad, Central Nucleoelectrica de Laguna Verde, Carretera Nautla-Cardel Km. 42.5, Alto Lucero, Veracruz (Mexico)

    2009-10-15

    The nuclear power plant of Laguna Verde located in the Gulf of Mexico, completes in this 2009, nineteen years to produce by nuclear means 4.78% of the electric power that Mexico requires daily. During this time, the Unit 1 has generated more of 88.85 million mega watt-hour and the Unit 2 more of 69.48 million mega watt-hour with an availability average of 83.55%. Derived of their operation cycles, the nuclear power plant has generated (as any other installation of its type) radioactive wastes of low activity that at the moment are temporarily stored in the site. Due to the life cycle of the nuclear power plant, actually has become necessary to begin a project series focused to continue guaranteeing the storage of these wastes, guarantee that is a license requirement for the operation of this nuclear installation before the National Commission of Nuclear Security and Safeguards. The Federal Commission of Electricity beginning a project that allows continue guaranteeing space of sufficient storage for the wastes that the nuclear power plant of Laguna Verde could generate for the rest of its useful life, this project consisted on a process of physical volume reduction of dry solid radioactive wastes denominated super compacting, it has made possible to reduce the volume that these wastes occupy in the temporary storage noted Dry Solid Radioactive Wastes Deposit located inside the site that occupies the nuclear power plant of Laguna Verde. This work presents the super compacting results, as well as a description of the realization of this task until concluding with the super compacting of 5,854 drums with dry solid radioactive waste of low activity. We will enunciate which were the radiological controls that the Department of Radiological Protection of the nuclear power plant of Laguna Verde applied to this work that was realized for first time in Mexico and the nuclear power plant. (Author)

  6. Discos en estrellas centrales de nebulosas planetarias

    Science.gov (United States)

    Saker, L.; Gómez, M.

    2016-08-01

    With the aim of investigating the possible existence of disks in the central stars of planetary nebulae (CSPN), in this contribution we present the spectral energy distributions of ten CSPN that show infrared (IR) excesses. Basic parameters of the disks such as internal radius and temperature are derived. When comparing the characteristics of these disks with the previously found around white dwarfs, it was found that the latter are significantly smaller. The disk sizes are compared with associated nebula. In general, disks are very compact and small in relation to the characteristic dimension of the nebula.

  7. Swedish support programme on nuclear non-proliferation in Central and Eastern Europe and Central Asia

    International Nuclear Information System (INIS)

    At the request of the Swedish Government, the Swedish Nuclear Power Inspectorate has established a support and co-operation programme in the area of nuclear non-proliferation with Russia and several of the republics of the former Soviet Union. The Programme was initiated in 1991 and an overall goal is to accomplish national means and measures for control and protection of nuclear material and facilities, in order to minimise the risk of proliferation of nuclear weapons and illicit trafficking of nuclear material and equipment. The objective of the Swedish Support Programme is to help each, so called, recipient State to be able to, independently and without help from outside, take the full responsibility for operating a national non-proliferation system and thereby fulfil the requirements imposed through the international legal instruments. This would include both the development and implementation of a modern nuclear legislation system, and the establishment of the components making up a national system for combating illicit trafficking. The support and co-operation projects are organised in five Project Groups (i.e. nuclear legislation, nuclear material control, physical protection, export/import control, and combating of illicit trafficking), which together cover the entire non-proliferation area. Up till June 2000, support and co-operation projects, completed and on-going, have been carried out in ten States, namely Armenia, Azerbaijan, Belarus, Georgia, Kazakstan, Latvia, Lithuania, Moldova, Russia and Ukraine. Furthermore, programmes have been initiated during the first part of 2000 with Estonia, Uzbekistan, Kyrgyzstan and Tajikistan. In addition, assistance has been given to Poland on a specific nuclear material accountancy topic. All projects are done on request by and in co-operation with these States. The total number of projects initiated during the period 1991 to June 2000 is 109, thereof 77 have been completed and 32 are currently on-going. It is the

  8. El efecto de los neutrinos degenerados en la transición de materia nuclear a materia de quarks

    Science.gov (United States)

    Lugones, G.; Benvenuto, O. G.

    Se estudia la transicion de materia nuclear a materia de quarks en presencia de un gas degenerado de neutrinos electrónicos y muónicos. Se muestra que la presencia de los neutrinos hace que las densidades de desconfinamiento de quarks sean notablemente mayores que las encontradas en el caso en que no haya neutrinos presentes. Se discuten las posibles consecuencias de este efecto en explosiones de supernova y evolución de proto estrellas de neutrones.

  9. Fall detecting process of negative reactivity in a nuclear power plant reactor and power plant protected against such fall. Procede de detection de la chute d'un element antireactif dans le reacteur d'une centrale nucleaire et centrale protegee contre une telle chute

    Energy Technology Data Exchange (ETDEWEB)

    Bourin, J.M.; Bruyere, M.; Rousseau, I.

    1988-08-26

    The fall of control rod in the core of a nuclear reactor is detected by using an external parameter influencing the reactor control and by monitoring variations in the power. The rod drop is detected when a rapide decrease in power is seen without a corresponding large change in the external parameter.

  10. Closure simulation of the MSIV of Unit 1 of the Laguna Verde nuclear power plant using the Simulate 3K code; Simulacion del cierre de las MSIV de la Unidad 1 de la central nuclear Laguna Verde empleando el codigo Simulate-3K

    Energy Technology Data Exchange (ETDEWEB)

    Alegria A, A., E-mail: aalegria@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Barragan 779, Col. Narvarte, 03020 Ciudad de Mexico (Mexico)

    2015-09-15

    In this paper the simulation of closure transient of all main steam isolation valves (MSIV) was performed with the Simulate-3K (S-3K) code for the Unit 1 of the Laguna Verde nuclear power plant (NPP-LV), which operates to thermal power of 2317 MWt, corresponding to the cycle 15 of operation. The set points for the performance of systems correspond to those set out in transient analysis: 3 seconds for the closure of all MSIV; the start of Scram when 121% of the neutron flux is reached, respect from baseline before the transient; the opening by peer of safety relief valves (SRV) in relief mode when the set point of the pressure is reached, the shoot of the feedwater flow seconds after the start of closing of the MSIV and the shoot of the recirculation water pumps when the pressure is reached in the dome of 1048 psig. The simulation time was of 57 seconds, with the top 50 to reach the steady state, from which the closure of all MSIV starts. In this paper the behavior of the pressure in the dome are analyzed, thermal power, neutron flux, the collapsed water level, the flow at the entrance of core, the steam flow coming out of vessel and the flow through of the SRV; the fuel temperature, the minimal critical power ratio, the readings in the instrumentation systems and reactivities. Instrumentation systems were implemented to analyze the neutron flux, these consist of 96 local power range monitors (LPRM) located in different radial and axial positions of the core and 4 channels of average power range monitors, which grouped at 24 LPRM each one. LPRM response to the change of neutron flux in the center of the core, at different axial positions is also shown. Finally, the results show that the safety limit MCPR is not exceeded. (Author)

  11. Criptococose do sistema nervoso central. Registro de um caso

    Directory of Open Access Journals (Sweden)

    Adherbal Tolosa

    1956-06-01

    Full Text Available Registro de caso de criptococose do sistema nervoso central, cujo diagnóstico foi estabelecido pelo exame do liqüido cefalorraquidiano. A presença do criptococo, verificada no exame direto, foi confirmada por culturas. O paciente apresentava quadro irritativo meníngeo, ao qual se associaram, ulteriormente, distúrbios encefálicos difusos e síndrome de hipertensão intracraniana. Evolução fatal após 4 meses de doença; foi tentada a sulfamido-terapia, sem resultado. O exame necroscópico confirmou a existência de leptomeningite difusa e micro-abscessos disseminados no córtex cerebral; o óbito foi relacionado à compressão bulbar por hérnia das tonsilas cerebelares.

  12. Annual report 89. Central Bureau for nuclear measurements

    International Nuclear Information System (INIS)

    This report covers CBNM's activities during the second year of the multiannual programme 1988-91. Its contents and form reflect the change in the role and in the working conditions of the Joint Research Center of which CBNM is an institute. The main task of CBNM as covered by the European Communities Framework Programme is defined as the specific programme Nuclear Measurements and Reference Materials. The activities of the CBNM - like for the other institutes of the JRC - are only in part funded as Specific Programme. A small proportion of the specific programme budget is allotted to Exploratory Research, in preparation of possible extensions of existing competences or of potential new activities. Parts of the funding are coming from Support to Other Commission Services and from Work for Third Parties on the basis of contracts. 36 contributions have been presented during a series of international conferences; 24 articles have been submitted for publication in scientific/technical journals

  13. Ultrasonic meters in the feedwater flow to recover thermal power in the reactor of nuclear power plant of Laguna Verde U1 and U2; Medidores ultrasonicos en el flujo de agua de alimentacion para recuperar potencia termica en el reactor de la Central Nuclear Laguna Verde U1 and U2

    Energy Technology Data Exchange (ETDEWEB)

    Tijerina S, F. [CFE, Central Laguna Verde, Km. 42.5 Carretera Cardel-Nautla, Veracruz (Mexico)]. e-mail: francisco.tijerina@cfe.gob.mx

    2008-07-01

    The engineers in nuclear power plants BWRs and PWRs based on the development of the ultrasonic technology for the measurement of the mass, volumetric flow, density and temperature in fluids, have applied this technology in two primary targets approved by the NRC: the use for the recovery of thermal power in the reactor and/or to be able to realize an increase of thermal power licensed in a 2% (MUR) by 1OCFR50 Appendix K. The present article mentions the current problem in the measurement of the feedwater flow with Venturi meters, which affects that the thermal balance of reactor BWRs or PWRs this underestimated. One in broad strokes describes the application of the ultrasonic technology for the ultrasonic measurement in the flow of the feedwater system of the reactor and power to recover thermal power of the reactor. One is to the methodology developed in CFE for a calibration of the temperature transmitters of RTD's and the methodology for a calibration of the venturi flow transmitters using ultrasonic measurement. Are show the measurements in the feedwater of reactor of the temperature with RTD's and ultrasonic measurement, as well as the flow with the venturi and the ultrasonic measurement operating the reactor to the 100% of nominal thermal power, before and after the calibration of the temperature transmitters and flow. Finally, is a plan to be able to realize a recovery of thermal power of the reactor, showing as carrying out their estimations. As a result of the application of ultrasonic technology in the feedwater of reactor BWR-5 in Laguna Verde, in the Unit 1 cycle 13 it was recover an equivalent energy to a thermal power of 25 MWt in the reactor and an exit electrical power of 6 M We in the turbogenerator. Also in the Unit 2 cycle 10 it was recover an equivalent energy to a thermal power of 40 MWt in the reactor and an exit electrical power of 16 M We in the turbogenerator. (Author)

  14. Nuclear safety in the newly independent states in central and eastern Europe

    International Nuclear Information System (INIS)

    The Chernobyl nuclear reactor accident in 1986 has led to a reassessment of safety issues in the nuclear industry's of the Commonwealth of Independent States (CIS) and in central and eastern Europe. Three aspects of the problem are explained and addressed here, design inadequacies in the RBMK and other reactor types, less than adequate operational safety procedures and lack of independent government regulation of state utilities, allowing economic targets to overcome safe operation of plants. (UK)

  15. Métodos avanzados de análisis de varianza en escenarios de prospectiva nuclear

    OpenAIRE

    Montalvo Martín, Cristina; García-Berrocal Sánchez, Agustin; Balbás Antón, Miguel; Blázquez, Juan

    2011-01-01

    La fisión nuclear, como fuente de energía, está basada en cuatro pilares característicos: la Economía, la Seguridad, la Sostenibilidad y la No-Proliferación. Es claro que estos pilares no son independientes. La Seguridad afecta al precio de costo del kWh, y éste, a la cantidad de reservas de uranio. Por otro lado, la proliferación fue una de las causas del escaso desarrollo de los reactores reproductores, lo que afectó considerablemente a las reservas de uranio.

  16. Prestaciones del Detector Central de Muones del Experimento CMS: las Camaras de Deriva y su Sistema de Trigger (Performance of the Central Muon Detector of the Experiment CMS: the Drift Tube Chambers and its Trigger System)

    CERN Document Server

    Muñoz, Carlos Villanueva

    2007-01-01

    Prestaciones del Detector Central de Muones del Experimento CMS: las Camaras de Deriva y su Sistema de Trigger (Performance of the Central Muon Detector of the Experiment CMS: the Drift Tube Chambers and its Trigger System)

  17. Paracoccidiomicosis en el sistema nervioso central: reporte de un caso

    Directory of Open Access Journals (Sweden)

    Jesús Rojas-Jaimes

    2015-01-01

    Full Text Available La paracoccidiomicosis es una enfermedad micótica que puede comprometer el sistema nervioso central (SNC. Se presenta el caso de un paciente varón de 45 años, inmunocompetente, de la ciudad de Satipo, que desarrollo paracoccidiomicosis en el SNC sin punto de entrada e infección aparente. El paciente fue diagnosticado por imágenes con un granuloma cerebelar, posteriormente, se realiza una craneotomía de donde se obtiene tejido y secreción del absceso del granuloma, se procedió al diagnóstico histológico y microbiológico, respectivamente, donde se observó la presencia de levaduras en el corte histológico y el crecimiento del hongo en el cultivo. El paciente, inicialmente, recibe antifúngicos, luego adquiere una infección intrahospitalaria, recibe colistina y posteriormente fallece. El caso reportado pone énfasis en la importancia del diagnóstico temprano y correcto para la buena evolución de los casos de paracoccidiomicosis.

  18. Paracoccidiomicosis en el sistema nervioso central: reporte de un caso

    Directory of Open Access Journals (Sweden)

    Jesús Rojas-Jaimes

    2015-03-01

    Full Text Available La paracoccidiomicosis es una enfermedad micótica que puede comprometer el sistema nervioso central (SNC. Se presenta el caso de un paciente varón de 45 años, inmunocompetente, de la ciudad de Satipo, que desarrollo paracoccidiomicosis en el SNC sin punto de entrada e infección aparente. El paciente fue diagnosticado por imágenes con un granuloma cerebelar, posteriormente, se realiza una craneotomía de donde se obtiene tejido y secreción del absceso del granuloma, se procedió al diagnóstico histológico y microbiológico, respectivamente, donde se observó la presencia de levaduras en el corte histológico y el crecimiento del hongo en el cultivo. El paciente, inicialmente, recibe antifúngicos, luego adquiere una infección intrahospitalaria, recibe colistina y posteriormente fallece. El caso reportado pone énfasis en la importancia del diagnóstico temprano y correcto para la buena evolución de los casos de paracoccidiomicosis.

  19. Overview of nuclear legislation in Central and Eastern Europe and the NIS

    International Nuclear Information System (INIS)

    This study provides an overview of current legislation governing the peaceful uses of nuclear energy in Central and Eastern European countries and the New Independent States. Revised to include information obtained since its original publication in October 1995, the current issue focuses on the institutional and legal frameworks which have been established in the countries under consideration. The competent nuclear authorities, the legislation in force, draft legislation and regulations, international conventions and membership in nuclear organisations of each country in the region are presented. (K.A.)

  20. Oficina central de Ralston Purina San Luis – (EE. UU.

    Directory of Open Access Journals (Sweden)

    Hellmuth, George

    1978-03-01

    Full Text Available The tall building housing these main offices is located on a lot with over 56 hectares; it constitutes the first stage of a complex which will consist of a series of auxiliary buildings for the Company. The building has a total constructed surface of 27,400 m2 on 15 floors. The top 12 floors are destined for administrative use with work space for about 1,200 employees and the first three floors are reserved for entrance and reception areas, exhibition room, executive offices and indoor garden areas. This unique utilization of the space is clearly evident in the distinct type of planning adopted. A very interesting characteristic of this building, a requisite from the very beginning, is its high degree of organizational flexibility, achieved by using reticular forging of modules of 1.50 x 1.50 m in which the building's different installations are located, which provides service availability anywhere in the building, independent of the organization or departmental divisions adopted.

    La torre que alberga estas oficinas centrales, situada en una parcela de más de 56 Ha, constituye la primera fase de un complejo que comprenderá una serie de edificios auxiliares para la compañía. Con una edificabilidad total de 27.400 m2 en sus 15 plantas, la torre destina los 12 niveles superiores a uso administrativo, con puestos de trabajo para unos 1.200 empleados, y reserva las tres primeras plantas para los servicios de acceso y recepción, sala de exposiciones, despachos de los directivos y zonas ajardinadas interiores. Esta diferente utilización queda claramente patentizada en el distinto planteamiento formal de plantas y alzados. Una interesante característica de la construcción, exigida en el programa inicial, es el alto grado de flexibilidad organizativa, conferida por el empleo de un forjado reticular, de 1,50 x 1,50 m de módulo, en el que van incluidas las distintas instalaciones del edificio, lo que permite el

  1. Las flores del desierto. Opciones de vida en pueblos de la región central de Sonora

    OpenAIRE

    Ma. Amalia Gracia; Jorge E. Horbath

    2014-01-01

    Aunque la búsqueda de las localidades rurales por generar opciones de vida se observa en el esfuerzo de algunos pobladores, en México la política pública se restringe a ofrecer garantías sociales; le deja al mercado la creación de alternativas económicas, que no alcanzan para producir desarrollo local y regional. El presente artículo reflexiona sobre esto, a partir de una iniciativa de trabajo asociativo surgida hace más de seis años en pueblos de la región central del norte de Sonora, y mues...

  2. Proposal of the visual inspection of the integrity of the storage cells of spent fuel from the nuclear power plant of Laguna Verde; Propuesta para la inspeccion visual de la integridad de las celdas de almacenamiento de combustible gastado de la Central Laguna Verde (CLV)

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez M, J. L.; Rivero G, T.; Merino C, F. J. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Santander C, L. E., E-mail: francisco.merino@inin.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Carretera Veracruz-Medellin Km 7.5, Col. Dos Bocas, 94271 Medellin, Veracruz (Mexico)

    2015-09-15

    As part of the evaluation of the structural integrity of the components of nuclear plants, particularly those applying for life extension is necessary to carry out inspections and nondestructive testing to determine the state meet. In many cases these activities are carried out in areas with high levels of radiation and contamination difficult to access, so that are required to use equipment or robotic systems operated remotely. Among others, the frames and cells of the storage pools for spent fuel are structures subject to a program of tests and inspections, and become relevant because the nuclear power plant of Laguna Verde (NPP-LV) is processing the license to extend the operational life of its reactors. Of non-destructive testing can be used to verify the physical condition of the frames and storage cells, is the remote visual inspection which is a test that allows determine the physical integrity of the components by one or more video cameras designed to applications in underwater environments with radiation, and are used to identify and locate adverse conditions such as ampoules, protuberances, pitting, cracks, stains or buckling, which could affect the three main functions for which the store components are designed: to maintain the physical integrity of spent fuels, store them properly guaranteeing their free insertion and removal, and ensure that the store as a whole meets the criticality criteria that k{sub eff} is less than 0.95 throughout the life of the plant. This paper describes a proposal to carry out the visual inspection of the storage cells of spent fuel from the NPP-LV using a probe including one or more video cameras along with your recorder, and its corresponding control program. It is noted that due to the obtained results, the nuclear power plant personnel can make decisions regarding remedial actions or applying complementary methods to verify that the cells and frames have not lost their physical integrity, or in particular that the cover

  3. Management report 2006 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2006 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2005, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  4. Management report 2005 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2005 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2005, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  5. Management report 2004 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2004 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2004, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  6. Management report 2007 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2007 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This document reports the general activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2007, involving the CNEN role in the public policy execution, the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, teaching, administration in general and miscellaneous.

  7. Susceptibilidad de Delia platura a siete aislamientos de nematodos entomopatógenos de la zona Central Andina de Colombia

    Directory of Open Access Journals (Sweden)

    Carolina Jaramillo Contreras

    2013-07-01

    Full Text Available La mosca de la semilla, Delia platura, es una de las principales plagas en los cultivos de espinaca en la sabana de Bogotá. En Colombia la plaga es controlada mediante la aplicación de insecticidas y la información sobre su control sigue siendo limitada. Por ello el objetivo de este trabajo fue evaluar la susceptibilidad de D. platura a siete aislamientos de nematodos entomopatógenos de la zona Central Andina de Colombia. Además de evaluar diferentes dosis y producción de juveniles infectivos (JIs de la especie más virulenta, bajo condiciones de laboratorio. En el laboratorio se estableció la cría en papa amarilla (Solanum phureja para obtener larvas de tercer instar, las cuales se expusieron a 2500 JIs/especie NEPS. Seleccionada la especie más virulenta, se expuso D. platura a 500, 1000, 2000, 4000 y 8000 JIs/larva. Los mejores resultados obtenidos se encontraron con Steinernema sp3 con una mortalidad entre el 75 a 88% en las dosis de 4000 y 8000 JIs encontrando que la DL50 es de 1314JIs/larva y 15259 JIs/larva la DL95. Así mismo, se estableció que Steinernema sp3 se reproduce exitosamente en D. platura, encontrando un promedio de producción 670 ± 7.67 JIs/larva durante un periodo de dieciocho días. La mosca de la semilla es altamente susceptible a Steinernema sp3, el cual puede ser un agente potencial para el control de esta plaga.

  8. FLUJOS DE PODER Y PODER DE LOS FLUJOS: ANÁLISIS DE UNA FÓRMULA CENTRAL DE MANUEL CASTELLS

    OpenAIRE

    Esteban Torres

    2015-01-01

    En el presente artículo analizo la principal fórmula del poder de Manuel Castells asociada con su noción de flujo, y una de las piezas centrales de su teoría sociológica del poder a partir de 1986: el vínculo entre flujos del poder y poder de los flujos. Se trata de una forma conceptual no definida por el autor, llamativamente críptica e inasible, a la vez que absolutamente clave para la comprensión de su visión contemporánea del poder y del Estado. El estudio permite descubrir, entre otros a...

  9. Energy and Centrality Dependences of Charged Multiplicity Density in Relativistic Nuclear Collisions

    Institute of Scientific and Technical Information of China (English)

    SA; Ben-hao; Bonasera; A; TAI; An

    2002-01-01

    Using a hadron and string cascade model, JPCIAE, the energy and centrality dependences of chargedparticle pseudo rapidity density in relativistic nuclear collisions were studied. Within the framework ofthis model, both the relativistic p + p experimental data and the PHOBOS and PHENIX Au + Au data at

  10. Central móvil de hormigón asfáltico

    Directory of Open Access Journals (Sweden)

    Editorial, Equipo

    1959-11-01

    Full Text Available En números anteriores se han publicado varios tipos de centrales hormigoneras, y entre ellas una para la preparación de hormigones asfálticos. El tipo de Central que se describe ligeramente en este trabajo, de la casa Braham Patterson & Benham Ltd, inglesa, presenta su particularidad propia e interés dentro del campo de rendimiento de producción del orden de 25 toneladas por hora.

  11. Las Áreas Centrales de Montevideo: En Procura de una Revitalización Integral

    OpenAIRE

    María del Huerto Delgado Dopazo

    2004-01-01

    Comenzando por una reseña histórica acerca de la conformación y evolución de la ciudad de Montevideo, capital del Uruguay, el presente artículo profundiza en los procesos de despoblamiento y degradación que sufrieron sus áreas centrales, en las últimas décadas del siglo XX; para finalmente reseñar las acciones y programas que a partir de los 90 se han propuesto e implementado, para revertir dichos procesos. Del análisis se desprenden las potencialidades y de...

  12. Criterios sobre la uniformidad de riego en cultivos protegidos de las provincias centrales

    OpenAIRE

    Miriel Ajete Gil; Camilo Bonet Pérez; Carmen Duarte Díaz; María C. Vargas Cruz; Valia Pérez García

    2011-01-01

    El presente trabajo tiene como objetivo evaluar aspectos técnicos en sistemas de riego de las provincias centrales del país pertenecientes al Programa de Cultivos Protegidos del MINAG. A partir de la puesta en explotación de los primeros módulos comienzan a presentarse deficiencias en la uniformidad del riego. En las casas de posturas, en Camagüey se ensayó una solución alternativa utilizando el emisor bailarina con resultados preliminares aceptables, experiencia que se extendió posteriorment...

  13. Results of the benchmarking in radiological protection practices during fuel reloads in the nuclear power plants of Limerick (BWR) and Ginna (PWR) in the United States of North America; Resultados del benchmarking en practicas de proteccion radiologica durante recargas de combustible en las centrales nucleoelectricas de Limerick (BWR) y Ginna (PWR) en los Estados Unidos de Norteamerica

    Energy Technology Data Exchange (ETDEWEB)

    Lara H, M. A., E-mail: marco.lara@cfe.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Carretera Cardel-Nautla Km 42.5, Alto Lucero, Veracruz (Mexico)

    2011-11-15

    The nuclear power plant of Laguna Verde, unique in our country, has been imposed several goals related with the continuous improvement of their acting; increase in the quantity of continuous days for operation cycle, improvement in the chemical indexes of the reactor coolant, improvement in the indexes of nuclear security, improvement in the indicators of industrial security, improvement in the standards of radiological protection, etc.; in this last item is precisely where is necessary to search creative solutions to be able to maintain the collective doses of the personnel so low as reasonably it is possible (ALARA) especially due to the last projects of extension of useful life of the nuclear power plant (zinc injection, noble metals and hydrogen) and of power increment of the nuclear power plant of Laguna Verde, same that represent in the short period an increment of collective dose and of exposition levels (until 200%) in very specific points of the primary systems of the reactor. (Author)

  14. The repair of an electric generator at the Patla hydro central; Reparacion de un generador de la central hidroelectrica de Patla

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez Hernandez, Roman [Luz y Fuerza del Centro, Mexico, D. F. (Mexico)

    1997-12-31

    This document describes the repair of the Generator Number 1 of the system of the Unit No. 1 of the Patla Hydro Power Central in Mexico. The tests that were conducted to determine the fault and the location of the same are shown. Mention is made of the fault repair options and the stages in one of the options are described, since it is the one that better covers the expectations for the satisfactory repair of the generator. Finally the commissioning test is described and it is concluded that an increment of 92% (14 MW) in the generation capacity of the unit was achieved, being this the first time a repair of this type is made of generating units [Espanol] Este documento describe la reparacion del generador numero 1 del sistema de la unidad numero 1 de la central hidroelectrica de Patla en Mexico. Se muestran las pruebas que se hicieron para determinar la falla y localizacion de la misma. Se mencionan las alternativas de reparacion de la falla y se describen las etapas de una de las alternativas, ya que es la que cubre mejor las expectativas para la reparacion satisfactoria del generador. Por ultimo se describe la prueba de puesta en servicio y se concluye en que se logro un aumento de la capacidad de generacion de la unidad en un 92% (14 MW), siendo la primera vez que se hace una reparacion de este tipo de unidades generadoras

  15. Energy problems of the central systems of air conditioning; Problemas energeticos de los sistemas centrales de climatizacion

    Energy Technology Data Exchange (ETDEWEB)

    Cardero Corria, Gaspar [Cubanacan, S.A., Varadero (Cuba)

    2003-07-01

    The central systems of air conditioning are widely used in air conditioning production for several reasons among which excel: 1) Better aesthetic of the building, 2) Less noise in the air conditioning premises and 3) Greater yield of the consumed energy. This is indeed the third reason in which this paper will try to contribute with elements that will allow reveal the problem and to identify some possible causes that originate it. The centralized systems of air conditioning must produce conditioned air with lesser power cost than the individual systems, it is that saving which allows to recover an investment that normally surpasses them in 3 to 5 times. Nevertheless, the real numbers do not demonstrate that. [Spanish] Los sistemas centrales de climatizacion son ampliamente usados en la produccion de aire acondicionado por varias razones entre las que sobresalen: 1) Mejor estetica del edificio, 2) Menor ruido en los locales climatizados y 3) Mayor rendimiento de la energia consumida. Es precisamente la tercera razon en la cual este trabajo intentara aportar elementos que permitan develar el problema e identificar algunas posibles causas que lo originan. Los sistemas centralizados de climatizacion deben producir aire acondicionado con un menor gasto energetico que los sistemas individuales, es precisamente ese ahorro lo que permite recuperar una inversion que normalmente los supera en 3 a 5 veces. Sin embargo, los numeros reales no demuestran eso.

  16. Implementation of the outcome of the PRISME project on spread of smoke and heat during a fire at the licensing in nuclear power plants; Aplicacion de los resultados del proyecto PRISME sobre propagacion de humos y calor durante un incendio al licenciamiento en centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Cordero Garcia, S.; Jimenez Garcia, M. a.; Peco Espinosa, J.

    2013-07-01

    The Spanish regulator (CSN) has actively participated the OECD/NEA PRISME project, whose main objectives and results are summarised in next sections. The project aims at addressing the most relevant aspects related to fire propagation phenomena within multi-compartment geometries, representative of actual configurations present in nuclear facilities, thereby providing an extensive basis for code validation to aid in fire risk analyses.

  17. Logistics of nuclear fuel production for nuclear submarines; Logistica de producao de combustiveis para submarinos nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Leonam dos Santos [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), SP (Brazil). E-mail: leosg@uol.com.br

    2000-07-01

    The future acquisition of nuclear attack submarines by Brazilian Navy along next century will imply new requirements on Naval Logistic Support System. These needs will impact all the six logistic functions. Among them, fuel supply could be considered as the one which requires the most important capacitating effort, including not only technological development of processes but also the development of a national industrial basis for effective production of nuclear fuel. This paper presents the technical aspects of the processes involved and an annual production dimensioning for an squadron composed by four units. (author)

  18. Las Áreas Centrales de Montevideo: En Procura de una Revitalización Integral

    Directory of Open Access Journals (Sweden)

    María del Huerto Delgado Dopazo

    2004-01-01

    Full Text Available Comenzando por una reseña histórica acerca de la conformación y evolución de la ciudad de Montevideo, capital del Uruguay, el presente artículo profundiza en los procesos de despoblamiento y degradación que sufrieron sus áreas centrales, en las últimas décadas del siglo XX; para finalmente reseñar las acciones y programas que a partir de los ’90 se han propuesto e implementado, para revertir dichos procesos. Del análisis se desprenden las potencialidades y debilidades de áreas centrales y de las propuestas de rehabilitación planteadas y en curso. Las mismas deberían enmarcarse en una planificación estratégica participativa y consensuada por todos los actores involucrados, para lograr un desarrollo local sustentable y sostenible en el tiempo. Es fundamental, para que las áreas centrales vuelvan a ser “centros vivos” de la ciudad y reconstruir la heterogeneidad tradicional del tejido social y funcional de sus barrios, el devolverles la función residencial que han ido perdiendo, y fomentar y fortalecer la participación ciudadana en los distintos niveles de los procesos.

  19. Detection of nuclear radiations; Detectores de radiaciones nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Tanarro Sanz, A.

    1959-07-01

    A summary of the lectures about the ordinary detectors of nuclear radiations given by the author in the Courses of Introduction to Nuclear Engineering held at the JEN up to the date of publication is given. Those lectures are considered to be a necessary introduction to Nuclear Instrumentation and Applied electronics to Nuclear Engineering so it has been intent to underline those characteristics of radiation detectors that must be taken in consideration in choosing or designing the electronic equipment associated to them in order to take advantage of each detector possibilities. (Author) 8 refs.

  20. Detection of nuclear radiations; Deteccion de Radiaciones nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Tanarro Sanz, A.

    1967-07-01

    A summary of the lectures about the ordinary detectors of nuclear radiations explained by the author in the courses of Nuclear Engineering held at the J.E.N. up to the date of publication is given. Those lectures are considered to be a necessary introduction to Nuclear Instrumentation and Applied Electronics to Nuclear Engineering so it has been intended to underline those characteristics of radiation detectors that must be taken in consideration in choosing or designing the electronic equipment associated to them in order to take advantage of each detector possibilities. (Author)

  1. Early mineralization at Cerro de Pasco (central Peru) revisited

    OpenAIRE

    Rottier, Bertrand; Casanova, Vincent; Fontboté, Lluis; Kouzmanov, Kalin; Alvarez, Hugo; Bendezú, Ronner

    2013-01-01

    The large Cerro de Pasco Cordilleran base metal deposit in central Peru is located on the eastern margin of a Middle Miocene diatreme-dome complex. A striking characteristic is the presence of a N-S trending massive funnel-shape pyrite-quartz replacement ore body that contains pyrrhotite pipes grading outwards to lead-zinc replacement bodies, along the eastern contact of the diatreme-dome complex. Earlier workers interpreted the pyrrhotite pipes as postdating the pyritequartz body. This study...

  2. Emission of {sup 14}C by the Almirante Alvaro Alberto Nuclear Power Plant 1 and 2 and their local effects on the environmental levels; Emissao de {sup 14}C pelas unidades 1 e 2 da Central Nuclear Almirante Alvaro Alberto (CNAAA) e seu efeito local nos niveis ambientais

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Cintia Melazo

    2006-07-01

    {sup 14}C is a is a long-lived beta-emitting nuclide (T{sub 1/2} = 5730 years) produced naturally in the upper atmosphere as a result of reactions between neutrons and stable {sup 14}N({sup 14}N(n,p){sup 14}C). Although in a lesser extent, nuclear power plants produce {sup 14}C as well during their routine operation. Since it is converted in {sup 14}CO{sub 2} and mixed throughout the atmosphere, it is incorporated into plant tissues, via photosynthesis process, and hence in food chain. Because of the biological importance of {sup 14}C and long half-life, it is of interest to quantify the amounts released by nuclear industry. The Brazilian nuclear central named Nuclear Central Admiral Alvaro Alberto (CNAAA) has two nuclear reactors of PWR type in operation, Angra I (657 MWe) and Angra II (1350 MWe), and one under construction, Angra III (1309 MWe PWR). The aim of this study was to determine the strength of the sources and the {sup 14}C content in the environment through analyses of air, vegetation and soils taken within 5 km (the influenced area) of CNAAA. The thesis consists of an extensive review about the subject (part one) and of four papers (part two). The first paper is about the determination of {sup 14}C concentrations released by reactors (source strength). For Angra I, a device was developed in order to sample the gaseous effluents and for Angra II, a commercial monitoring system had already been implemented since its initial operation (2001). The {sup 14}C can be emitted as hydrocarbons, CO or CO{sub 2}, depending on the type of reactor. For PWRs, the main chemical form released is hydrocarbons (80 %). The monitoring system of Angra I was planned to determine both CO{sub 2} and hydrocarbon fractions but in Angra II, all hydrocarbons are converted to CO{sub 2} by using a Pd/Al{sub 2}O{sub 3} catalyst at 450 deg C. The liquid scintillation was the method employed to measure the samples. The second one concerns the atmospheric dispersion of the released

  3. Ground acceleration in a nuclear power plant; Aceleracion del suelo en una central nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Pena G, P.; Balcazar, M.; Vega R, E., E-mail: pablo.pena@inin.gob.mx [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2015-09-15

    A methodology that adopts the recommendations of international organizations for determining the ground acceleration at a nuclear power plant is outlined. Systematic presented here emphasizes the type of geological, geophysical and geotechnical studies in different areas of influence, culminating in assessments of Design Basis earthquake and the earthquake Operating Base. The methodology indicates that in regional areas where the site of the nuclear power plant is located, failures are identified in geological structures, and seismic histories of the region are documented. In the area of detail geophysical tools to generate effects to determine subsurface propagation velocities and spectra of the induced seismic waves are used. The mechanical analysis of drill cores allows estimating the efforts that generate and earthquake postulate. Studies show that the magnitude of the Fukushima earthquake, did not affect the integrity of nuclear power plants due to the rocky settlement found. (Author)

  4. Control de calidad en centrales frutícolas. Equipamiento de laboratorios

    OpenAIRE

    Valero Ubierna, Constantino; Ruiz-Altisent, Margarita

    2000-01-01

    La fruta y hortaliza fresca son productos sumamente perecederos. El que conserven su calidad y su aspecto saludable durante el mayor tiempo posible es de importancia central para que conserven su valor. Un cuidadoso control de su estado durante la manipulación es ineludible.

  5. Control of gaseous emissions in central Costanera S.A. of Argentina; Control de emisiones gaseosas en central Costanera S. A. de Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Brabenec, Edgardo [Unidad de Negocios Central Costanera, S. A., (Argentina)

    1996-12-31

    A description is presented of the equipment utilized at the Central Costanera, S.A. of Argentina, the requirements and the Environmental Management established for this Power Station, and the Standards and the resolutions and law instruments on Environmental issues. Also it is presented the Environmental Management plan of the Ente Nacional Regulador de Electricidad of Argentina as well as the controls and environmental corrective actions implemented at the Central Costanera, S.A. [Espanol] Se presenta una descripcion del equipo utilizado en la Central Costanera S.A. de Argentina, los requerimientos de gestion ambiental establecidos para esta central y las normas, resoluciones e instrumentos juridicos en materia ambiental. Se presenta ademas el plan de gestion ambiental del Ente Nacional Regulador de la Electricidad de Argentina asi como los controles y acciones correctivas ambientales implantadas en la Central Costanera S. A.

  6. Corrales de piedra-pirkas- un patrimonio cultural del paisaje rural de Chile central

    OpenAIRE

    Tomic Jakas, Tonci Stipe

    2016-01-01

    Quisiéramos partir con este soliloquio, quizás el más famoso del drama español; ocurre al final del primer acto, cuando Segismundo piensa en la vida y en su suerte. No es el fatalismo lo que interesa si no que desde el inicio explicitar que se trata de una reflexión que lleva a configurar un visión –algo que anida en la mente-- que su fin central radica es tratar de poner en valor sobre la base de la importancia histórica, cultural y patrimonial de los muros de piedra o pirkas; en particular ...

  7. The AP1000 registered philosophy fits nuclear new build in Central Europe

    International Nuclear Information System (INIS)

    The World Nuclear Association estimates a steady growth in the number of reactors to be built in the next 20 years. The number of reactors in operation worldwide today is about 440 and will rise within the next couple of decades. It is speculated that Western Europe (including Germany) will have more reactors coming offline than online in the future due to limited lifetime versus plans for new build. In contrast, Eastern Europe (including Russia) is forecasting an increase in their nuclear generating capacity. This includes new market entrants such as Poland as well as expansion projects in the Czech Republic and Hungary; Germany's eastern neighbors. Unfortunately, as Germany and Switzerland phase out nuclear the net capacity in Western Europe is expected to drop even more. In addition to the phase out of nuclear, the federal German government decided to increase the power generation of renewables, focusing on wind and solar. The consequence of simultaneously implementing these new requirements is the creation of high frequency load changes from wind fluctuations or solar peaks without having the nuclear base load to maintain a constant capacity. These decisions on Germany's energy polices has extenuating circumstances which create challenges for local transmission system operators, as well as for neighboring countries' transmission system operators due to the synchronous grid of Continental Europe. This challenge will force the countries connected to Germany by the synchronous grid to place even more importance on their nuclear new build programs in the years to come. Though Germany is phasing out nuclear all together, its neighboring countries in Central and Eastern Europe are continuing with nuclear new build efforts. Therefore, it is still important for the German public to understand the options the nuclear industry have when selecting nuclear reactor vendors. The designs of today are more technically advanced, however the AP1000 registered plant stands out

  8. Análisis implicativo que refuerza validez y fiabilidad de un cuestionario de medidas de tendencia central

    OpenAIRE

    Mayén, Silvia

    2014-01-01

    El Análisis implicativo es un método estadístico que utilizamos para reforzar la validez y fiabilidad de un instrumento de evaluación obtenidas con métodos clásicos, el cual llevamos a cabo sobre las respuestas de un cuestionario que evalúa la comprensión de las medidas de tendencia central y que aplicamos a 643 estudiantes mexicanos de Educación Secundaria y Bachillerato. Nuestro interés se basa en las dificultades que presentan los estudiantes en el estudio de la estadística básica. Obtuvim...

  9. Community Resources Guide for Central Florida = Una Guia de Recursos en la Comunidad de Florida Central.

    Science.gov (United States)

    Medina, Linda, Comp.

    Designed to orient Hispanic refugees to the services that are available in Central Florida, this bilingual guide consists of a section of general information on living and working in the United States and a section devoted to various public and private agencies. Provided first are addresses and phone numbers of various government agencies:…

  10. Diversidad de aves de hábitats naturales y modificados en un paisaje de la Depresión Central de Chiapas, México

    OpenAIRE

    Ramírez-Albores, Jorge E.

    2010-01-01

    Se presenta un análisis de la diversidad y riqueza de aves en un paisaje fragmentado en la Depresión Central de Chiapas. El trabajo de campo se realizó de febrero de 2003 a enero de 2004. Se utilizó el método de conteo por puntos, registrando un total 35 familias y 225 especies de aves. Del total de especies registradas 164 son residentes y 61migratorias. El 3% de las especies son abundantes y el 30% son raras. Se presentaron diferencias significativas en la diversidad, riqueza de especies y ...

  11. Storage facilities of spent nuclear fuel in dry for Mexican nuclear facilities; Instalaciones de almacenamiento de combustible nuclear gastado en seco para instalaciones nucleares mexicanas

    Energy Technology Data Exchange (ETDEWEB)

    Salmeron V, J. A.; Camargo C, R.; Nunez C, A.; Mendoza F, J. E.; Sanchez J, J., E-mail: juan.salmeron@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Jose Ma. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2013-10-15

    In this article the relevant aspects of the spent fuel storage and the questions that should be taken in consideration for the possible future facilities of this type in the country are approached. A brief description is proposed about the characteristics of the storage systems in dry, the incorporate regulations to the present Nuclear Regulator Standard, the planning process of an installation, besides the approaches considered once resolved the use of these systems; as the modifications to the system, the authorization periods for the storage, the type of materials to store and the consequent environmental impact to their installation. At the present time the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) considers the possible generation of two authorization types for these facilities: Specific, directed to establish a new nuclear installation with the authorization of receiving, to transfer and to possess spent fuel and other materials for their storage; and General, focused to those holders that have an operation license of a reactor that allows them the storage of the nuclear fuel and other materials that they possess. Both authorizations should be valued according to the necessities that are presented. In general, this installation type represents a viable solution for the administration of the spent fuel and other materials that require of a temporary solution previous to its final disposal. Its use in the nuclear industry has been increased in the last years demonstrating to be appropriate and feasible without having a significant impact to the health, public safety and the environment. Mexico has two main nuclear facilities, the nuclear power plant of Laguna Verde of the Comision Federal de Electricidad (CFE) and the facilities of the TRIGA Reactor of the Instituto Nacional de Investigaciones Nucleares (ININ) that will require in a future to use this type of disposition installation of the spent fuel and generated wastes. (Author)

  12. Study and characterization of noble metal deposits on similar rusty surfaces to those of the reactor U-1 type BWR of nuclear power station of Laguna Verde; Estudio y caracterizacion de depositos de metales nobles sobre superficies oxidadas similares a las del reactor de la Central de Laguna Verde (CNLV) U1 del tipo BWR

    Energy Technology Data Exchange (ETDEWEB)

    Flores S, V. H.

    2011-07-01

    In the present investigation work, were determined the parameters to simulate the conditions of internal oxidation reactor circulation pipes of the nuclear power plant of Laguna Verde in Veracruz. We used 304l stainless steel cylinders with two faces prepared with abrasive paper of No. 600, with the finality to obtain similar surface to the internal circulation piping nuclear reactor. Oxides was formed within an autoclave (Autoclave MEX-02 unit B), which is a device that simulates the working conditions of the nuclear reactor, but without radiation generated by the fission reaction within the reactor. The oxidation conditions were a temperature of 280 C and pressure of 8 MPa, similar conditions to the reactor operating in nuclear power plant of Laguna Verde in Veracruz, Mexico (BWR conditions), with an average conductivity of 4.58 ms / cm and 2352 ppb oxygen to simulate normal water chemistry NWC. Were obtained deposits of noble metal oxides formed on 304l stainless steel samples, in a 250 ml autoclave at a temperature range of 180 to 200 C. The elements that were used to deposit platinum-rhodium (Pt-Rh) with aqueous Na{sub 2}Pt (OH){sub 6} and Na{sub 3}Rh (NO{sub 2}){sub 6}, Silver (Ag) with an aqueous solution of AgNO{sub 3}, zirconium (Zr) with aqueous Zr O (NO{sub 3}) and ZrO{sub 2}, and zinc (Zn) in aqueous solution of Zn (NO{sub 3}){sub 2} under conditions of normal water chemistry. Also there was the oxidation of 304l stainless steel specimens in normal water chemistry with a solution of Zinc (Zn) (NWC + Zn). Oxidation of the specimens in water chemistry with a solution of zinc (Zn + NWC) was prepared in two ways: within the MEX-02 autoclave unit A in a solution of zinc and a flask at constant temperature in zinc solution. The oxides formed and deposits were characterized by scanning electron microscopy, energy dispersive X-ray analysis, elemental field analysis and X-ray diffraction. By other hand was evaluated the electrochemical behavior of the oxides

  13. Annual progress report on nuclear data 1989. Central Bureau for nuclear measurements

    International Nuclear Information System (INIS)

    In 1989 the efforts for the improvement of the set of standard neutron cross sections and other quantities selected within the INDC/NEANDC Standards File continued. In particular a detailed study of the nuclear mass and charge distribution of the cold and near cold fission of 252Cf yielded understanding of cold mass rearrangements in nuclei. Accuracy of alpha-particle emission probabilities for major transitions in the decay of 236Pu, 239Pu and 243Am was improved to better than 0.5%. In the field of nuclear data for fission technology work was concentrated on European requests in the NEA High Priority Request List. The number of neutrons emitted per neutron absorbed, was obtained for 235U between 2 and 100 meV neutron energy. Using the weighting function determined at CBNM for neutron capture detectors, a new value was obtained for the neutron width of the 1.15 keV resonance in 56FeΓn = (62.9 ± 2.1) meV. In the field of nuclear data for fusion technology, measurements continued aiming at an improvement of relevant data for neutron transport calculations in the blanket and for prediction of gas production. The radionuclide metrology subproject follows three lines: determination of decay-scheme data, preparation of special standards and the improvement of measurement techniques including international comparisons

  14. Nuevas consideraciones en torno a la Cleopatra del Esquilino de la Central Montemartini de Roma

    Directory of Open Access Journals (Sweden)

    Silvio Strano

    2008-07-01

    Full Text Available Este artículo es un estudio sobre la iconografía de Cleopatra VII Philopator, hoy conocida gracias a las efigies monetarias y a los pocos retratos de bulto redondo llegados hasta nosotros. La atención se centra en la discutida interpretación de la Cleopatra/Venus Esquilina de la Sala Caldaie de la Centrale Montemartini de Roma. Los resultados de esta investigación han permitido demostrar la identificación propuesta de la réplica como imagen divinizada de la última reina tolemaica, aquí representada como Isis-Afrodita. Además, el autor propone una datación diferente de la obra, individúa el probable patrocinio, así como también, el lugar de su originaria localización.This essay is a survey about the iconography of Cleopatra VII Philopator, today well known thanks to the coin images and to the few portraits in full relief handed down to us. Attention is concentrated on the debated interpretation of the Cleopatra/Venus Esquiline found in the Sala Caldaie of the Centrale Montemartini in Rome. The result of this survey has allowed the suggested identification of the replica to be confirmed, as divinized image of the last Tolemaic Queen portrayed here as Isis-Aphrodite. Moreover the author proposes a different dating of the work, identifies the possible commission and also the site of its original positioning.

  15. Servei de Central Authentication Server (CAS)& Single Sign On (SSO): Cas pràctic

    OpenAIRE

    Marcos Rodríguez, Carlos

    2016-01-01

    Implementació d'un cas pràctic de Single Sign On mitjançant un servidor d'autenticació CAS (Central Authentication Server) Implementación de un caso práctico de Single Sign On mediante un servidor de autenticación CAS (Central Authentication Server) Implementation of a case study using a Single Sign On authentication server CAS (Central Authentication Server)

  16. Sistemas de producción de potencia nuclear: estado actual de la tecnología y perspectivas futuras

    OpenAIRE

    Carmona Cabezas, Juan Manuel

    2015-01-01

    La energía nuclear es una de las fuentes de energía más importantes entre las existentes utilizadas por el ser humano. Por una parte, estas instalaciones no emiten contaminantes a la atmósfera durante el proceso y son capaces de alcanzar las mayores potencias de cara a la generación de energía eléctrica. De manera contraria, producen residuos que pueden llegar a tener decenas de miles de años de actividad radiactiva. El objetivo de este proyecto es la realización de un estudio profundo de est...

  17. Instituto de Asuntos Nucleares. Report of Activities 1989

    International Nuclear Information System (INIS)

    It is a summary of the technical activities carried out by the Instituto de Asuntos Nucleares, Bogota, Colombia, during 1989. It includes activities in topics as: research projects, transfer of technology, scientific information, qualification and training programs, mainly, which were done in areas like: agriculture, industrial applications, medicine, radiation protection, hydrology, nuclear technology development, radiochemistry and physics, among others

  18. AVIFAUNA DE SITIOS ASOCIADOS A LA SELVA TROPICAL EN LA DEPRESIÓN CENTRAL DE CHIAPAS, MÉXICO

    OpenAIRE

    Ramírez-Albores, Jorge E.

    2010-01-01

    Se realizó una descripción de la composición y estructura de la avifauna de sitios asociados a la selva tropical en la Depresión Central de Chiapas, de 2003 a 2004. La riqueza avifaunística en el área de estudio fue de 364 especies considerando el trabajo de campo y los registros previos provenientes de literatura y de especímenes depositados en colecciones. Las familias con mayor riqueza de especies fueron Tyrannidae, Parulidae, Icteridae y Trochilidae. El componente estacional de las especi...

  19. IAEA activities to improve occupational radiation protection in nuclear power plants in Central and Eastern Europe

    International Nuclear Information System (INIS)

    The following aspects are highlighted: developing standards, ISOE (Information System on Occupational Exposure), providing assistance, and intercomparisons. By means of these coordinated efforts, the IAEA aims at improving occupational radiation protection in nuclear power plants in Central and Eastern Europe. The objective is not only transfer of knowledge and technology but also encouraging cooperation between health physicists in those countries as well as with health physicists in Western countries. (P.A.)

  20. Aquatic macro algae of a region under Almirante Alvaro Alberto nuclear power plant influence. I. Spatial seasonal evaluation; Macroalgas marinhas da regiao sob influencia da Central Nuclear Almirante Alvaro Alberto (CNAAA), Saco de Piraquara de Fora, Angra dos Reis, RJ, Brasil. I. Avaliacao espaco-temporal

    Energy Technology Data Exchange (ETDEWEB)

    Pedrini, A.G. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)]|[Universidade Santa Ursula, Rio de Janeiro, RJ (Brazil). Centro de Ciencias Biologicas; Cassano, V.; Coelho, L.G.; Labronici, G.J. [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Inst. de Biologia

    1994-12-31

    Marine macro algae from the area which is under in fluence of the heated and chlorate liquid effluent to the CNAAA were observed (1981-1983) at 3 collection points: Pingo Dagua, Velho Beach, discharge point. A total of 121 taxa were found: 29 Chlorophyta, 26 Phaeophyta and 66 Rhodophyta. The spring season was the richest in taxa (78) while autumn was the poorest (85). Overall, the data suggest that the point A (Pingo Dagua) macro algae community (which is similar to the discharge point (0,80) is adequate for the control of the CNAAA effluent impact ad Piraquara de Fora. (author). 11 refs, 5 figs, 1 tab.

  1. Knowledge management in nuclear power plants; Gestion del conocimiento en las centrales nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Cal, C. de la; Barasoain, F.; Buedo, J. L.

    2013-03-01

    This article aims to show the importance of knowledge management from different perspectives. In this first part part of the article, the overall approach that performs CNAT of knowledge management is described. In the second part, a specific aspect of knowledge management in ANAV, tacit knowledge transfer is showed. finally, the third part discusses the strategies and actions that are followed in CNCO for knowledge management. All this aims to show an overview of knowledge management held in the Spanish Nuclear Power Plants. (Author)

  2. O desastre nuclear de Fukushima e os seus impactos no enquadramento midiático das tecnologias de fissão e fusão nuclear

    OpenAIRE

    Schmidt, Luísa; Horta, Ana; Pereira, Sérgio

    2014-01-01

    O desastre nuclear de Fukushima veio relembrar desastres nucleares anteriores tais como os de Three Miles Island e Chernobyl, trazendo de volta à esfera pública o debate em torno dos problemas de segurança das centrais nucleares. No entanto, enquanto o risco associado à energia nuclear tradicional (fissão) foi amplificado pela mídia, uma nova tecnologia de energia nuclear em investigação (fissão) não foi afetada. Uma comparação entre a cobertura midiática das tecnologias de fusão e fissão nuc...

  3. Tiempo de espera y su relación con la satisfacción de los usuarios de la farmacia central de un hospital general de Lima

    Directory of Open Access Journals (Sweden)

    Ericson Gutierrez

    2009-01-01

    Full Text Available Para determinar la influencia del tiempo de espera sobre la satisfacción del usuario en la farmacia central del Hospital Nacional Dos de Mayo (HNDM, se realizó un estudio transversal donde se registró los tiempos de espera por cada subproceso de atención (facturación, pago en caja y entrega de medicamentos mediante la observación directa de los usuarios. Se evaluó el nivel de satisfacción del usuario según una escala Likert. Se incluyó 150 usuarios, 59% fueron mujeres, la edad promedio fue de 41,4±12,6 años. El promedio de tiempo total de espera fue de 37,1±14,7 minutos. El tiempo de espera fue significativamente mayor en el subproceso de facturación (p<0,001; asimismo el tiempo que los usuarios tardaron en hacer colas fue mayor que el tiempo efectivo (30,1±14.0 frente a 6,3±4,4; p<0,001. El 17,3% de los usuarios de la farmacia central del HNDM mostraron algún grado de satisfacción. El tiempo de espera menor a 20 minutos fue un predictor de satisfacción del usuario (OR: 4,6 [1,1-18,3]; p<0,05 independientemente de los otros factores. En conclusión, el tiempo de espera prolongado principalmente en el subproceso de facturación, condiciona un bajo nivel de satisfacción del usuario en la farmacia central del HNDM.

  4. Upgrading of data acquisition software for centralized radiation monitoring system in Malaysian Nuclear Agency

    Energy Technology Data Exchange (ETDEWEB)

    Yussup, F., E-mail: nolida@nm.gov.my; Ibrahim, M. M., E-mail: maslina-i@nm.gov.my; Soh, S. C.; Hasim, H. [Instrumentation and Automation Centre, Technical Support Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang. Selangor (Malaysia); Haris, M. F. [Information Technology Centre, Technical Support Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang. Selangor (Malaysia); Azman, A. [Prototype and Development Centre, Technical Support Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang. Selangor (Malaysia); Razalim, F. A. A.; Yapp, R. [Health Physics Group, Radiation Safety and Health Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang. Selangor (Malaysia); Ramli, A. A. M. [Technical Support Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang. Selangor (Malaysia)

    2016-01-22

    With the growth of technology, many devices and equipments can be connected to the network and internet to enable online data acquisition for real-time data monitoring and control from monitoring devices located at remote sites. Centralized radiation monitoring system (CRMS) is a system that enables area radiation level at various locations in Malaysian Nuclear Agency (Nuklear Malaysia) to be monitored centrally by using a web browser. The Local Area Network (LAN) in Nuclear Malaysia is utilized in CRMS as a communication media for data acquisition of the area radiation levels from radiation detectors. The development of the system involves device configuration, wiring, network and hardware installation, software and web development. This paper describes the software upgrading on the system server that is responsible to acquire and record the area radiation readings from the detectors. The recorded readings are called in a web programming to be displayed on a website. Besides the main feature which is acquiring the area radiation levels in Nuclear Malaysia centrally, the upgrading involves new features such as uniform time interval for data recording and exporting, warning system and dose triggering.

  5. Upgrading of data acquisition software for centralized radiation monitoring system in Malaysian Nuclear Agency

    Science.gov (United States)

    Yussup, F.; Ibrahim, M. M.; Haris, M. F.; Soh, S. C.; Hasim, H.; Azman, A.; Razalim, F. A. A.; Yapp, R.; Ramli, A. A. M.

    2016-01-01

    With the growth of technology, many devices and equipments can be connected to the network and internet to enable online data acquisition for real-time data monitoring and control from monitoring devices located at remote sites. Centralized radiation monitoring system (CRMS) is a system that enables area radiation level at various locations in Malaysian Nuclear Agency (Nuklear Malaysia) to be monitored centrally by using a web browser. The Local Area Network (LAN) in Nuclear Malaysia is utilized in CRMS as a communication media for data acquisition of the area radiation levels from radiation detectors. The development of the system involves device configuration, wiring, network and hardware installation, software and web development. This paper describes the software upgrading on the system server that is responsible to acquire and record the area radiation readings from the detectors. The recorded readings are called in a web programming to be displayed on a website. Besides the main feature which is acquiring the area radiation levels in Nuclear Malaysia centrally, the upgrading involves new features such as uniform time interval for data recording and exporting, warning system and dose triggering.

  6. Upgrading of data acquisition software for centralized radiation monitoring system in Malaysian Nuclear Agency

    International Nuclear Information System (INIS)

    With the growth of technology, many devices and equipments can be connected to the network and internet to enable online data acquisition for real-time data monitoring and control from monitoring devices located at remote sites. Centralized radiation monitoring system (CRMS) is a system that enables area radiation level at various locations in Malaysian Nuclear Agency (Nuklear Malaysia) to be monitored centrally by using a web browser. The Local Area Network (LAN) in Nuclear Malaysia is utilized in CRMS as a communication media for data acquisition of the area radiation levels from radiation detectors. The development of the system involves device configuration, wiring, network and hardware installation, software and web development. This paper describes the software upgrading on the system server that is responsible to acquire and record the area radiation readings from the detectors. The recorded readings are called in a web programming to be displayed on a website. Besides the main feature which is acquiring the area radiation levels in Nuclear Malaysia centrally, the upgrading involves new features such as uniform time interval for data recording and exporting, warning system and dose triggering

  7. Regional Strategies Concerning Nuclear Fuel Cycle and HLRW in Central and Eastern European Countries

    International Nuclear Information System (INIS)

    In March 2009 a regional meeting on national strategies concerning nuclear fuel cycle and high level radioactive waste (HLRW) was held in Budapest with the participation of Central and Eastern European countries, Russia and France. Following the meeting a Task Force was set-up with fuel cycle experts from different countries in order to analyse the possible fuel cycle strategies in the region. The Task Force produced an Opinion Paper in spring 2010 on the Regional Strategies Concerning Nuclear Fuel Cycle and HLRW in Central and Eastern European Countries with several recommendations. The Opinion Paper emphasizes that the countries in the Central and Eastern European region are small, and they have modest NPP capacities compared to large nuclear countries. Spent fuel reprocessing facilities are not available in the region, but Russia and France offer such services for these countries. Deep geological repositories are not in operation in any of these countries, and in some of the countries the geological conditions do not allow to design such facilities. For these reasons the countries of the region may need special services and a regional approach could produce common benefit for waste management. (author)

  8. Las encuadernaciones mudéjares toledanas con motivo central de la catedral de Toledo

    Directory of Open Access Journals (Sweden)

    Carpallo Bautista, Antonio

    2012-12-01

    Full Text Available The Capitular Library of Toledo Cathedral has among its collection a group of Mudejar bindings with decorative central motives realized by craftsmen during the 15th century. This work indicates the existence of different workshops that realized orders for the cathedral by means of the study of the decorative structures of the boards and spines, the individual decorative elements used, the construction and decoration of the headbands, the metallic and embroidered clasps, as well as the identifi cation of the heraldic emblems that appear on the fi rst folios of the volumes.

    La Biblioteca Capitular de la Catedral de Toledo dispone entre sus fondos de un grupo de encuadernaciones mudéjares con motivos decorativos centrales realizadas por artesanos durante el siglo XV. Este trabajo nos señala la existencia de diferentes talleres que realizaron encargos para la catedral mediante el estudio de las estructuras decorativas de las tapas y lomos, los elementos decorativos individuales empleados, la construcción y decoración de las cabezadas, los broches metálicos y bordados, así como la identifi cación de los emblemas heráldicos que aparecen en los primeros folios de los volúmenes.

  9. Security central processing unit applications in the protection of nuclear facilities

    International Nuclear Information System (INIS)

    New or upgraded electronic security systems protecting nuclear facilities or complexes will be heavily computer dependent. Proper planning for new systems and the employment of new state-of-the-art 32 bit processors in the processing of subsystem reports are key elements in effective security systems. The processing of subsystem reports represents only a small segment of system overhead. In selecting a security system to meet the current and future needs for nuclear security applications the central processing unit (CPU) applied in the system architecture is the critical element in system performance. New 32 bit technology eliminates the need for program overlays while providing system programmers with well documented program tools to develop effective systems to operate in all phases of nuclear security applications

  10. Benchmarking de la banca central en América Latina, 1990-2010

    Directory of Open Access Journals (Sweden)

    Germán Alarco Tosoni

    2013-01-01

    Full Text Available Se desarrolla un análisis de benchmarking de la eficacia de la banca central en América Latina en 1990-2010. Con tal objetivo se consideran las funciones principales y secundarias de la autoridad monetaria en los países considerados, luego de analizar brevemente la evolución de las prácticas de los banqueros centrales internacionales. Se seleccionan, especifican y ponderan los indicadores pertinentes para evaluar el desempeño de estas instituciones: menor inflación, mayor disponibilidad de crédito al sector privado, menores márgenes de intermediación financiera, menor variabilidad del tipo de cambio real y diversos objetivos para las reservas internacionales. Se establecen funciones objetivo, que se miden con la información oficial disponible. Por último, se establece un ordenamiento de los bancos centrales considerando los indicadores y funciones objetivo seleccionadas.

  11. Electric generator overhaul of the Ing. Carlos Ramirez Ulloa hydroelectric. Central project conclusions; Rehabilitacion de los generadores de la central hidroelectrica Ing. Carlos Ramirez Ulloa. Conclusiones del proyecto

    Energy Technology Data Exchange (ETDEWEB)

    Campuzano Martinez, Ignacio Roberto; Gonzalez Vazquez, Alejandro Esteban; Robles Pimentel, Edgar Guillermo; Esparza Saucedo, Marcos; Garcia Martinez, Javier; Sanchez Flores, Ernesto; Martinez Romero, Jose Luis [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    The Hydroelectric Ing. Carlos Ramirez Ulloa Power Central has three 200 MW electric generators. The Central initiated its commercial operation in 1985. The electric generators had design problems that were properly corrected in an overhaul program that was initiated in 1996, with Unit 2 electric generator and completed in 1998 with Unit 1 electric generator. This paper presents the relevant aspects of the experience accumulated in the project. [Espanol] La central hidroelectrica Ing. Carlos Ramirez Ulloa cuenta con tres generadores de 200 MW cada uno. La central inicio su operacion comercial en 1985. Los generadores tenian problemas de diseno que fueron debidamente corregidos en un programa de rehabilitacion que inicio en 1996, con el generador de la unidad 2, y culmino en 1998 con el generador de la unidad 1. En este articulo se presentan los aspectos relevantes de la experiencia acumulada en el proyecto.

  12. Fertilization in Torenia fournieri: actin organization and nuclear behavior in the central cell and primary endosperm

    Institute of Scientific and Technical Information of China (English)

    YUAN; Ming(袁明); FU; Ying(傅缨); WANG; Feng(王凤); HUANG; Bingquan(黄炳权); Sze-Yong; Zee(徐是雄); Peter; K.Hepler

    2002-01-01

    Studies of the living embryo sacs of Torenia fournieri reveal that the actin cytoskeleton undergoes dramatic changes that correlate with nuclear migration within the central cell and the primary endosperm. Before pollination, actin filaments appear as short bundles randomly distributed in the cortex of the central cell. Two days after anthesis, they become organized into a distinct actin network. At this stage the secondary nucleus, which is located in the central region of the central cell, possesses an associated array of short actin filaments. Soon after pollination, the actin filaments become fragmented in the micropylar end and the secondary nucleus is located next to the egg apparatus. After fertilization, the primary endosperm nucleus moves away from the egg cell and actin filaments reorganize into a prominent network in the cytoplasm of the primary endosperm. Disruption of the actin cytoskeleton with latrunculin A and cytochalasin B indicates that actin is involved in the migration of the nucleus in the central cell. Our data also suggest that the dynamics of actin cytoskeleton may be responsible for the reorganization of the central cell and primary endosperm cytoplasm during fertilization.

  13. Biblioteca de la Universidad Central de San Diego - California (EE. UU.

    Directory of Open Access Journals (Sweden)

    William L. Pereira y Asociados, Arquitectos

    1972-09-01

    Full Text Available This building, which is an original and daring design, consists of five floors and is sphere shaped. It is in the central square of the campus with magnificent views in all directions. It is anticipated that there will be room for 700,000 volumes and about 1,250 students. And in the near future, with easy extensions, these figures will be tripled. The central nucleus and the concrete columns constitute the vertical structure, from which the beams which support the floors extend. The majority of these elements have been left exposed.El edificio, de original y atrevido diseño, consta de cinco plantas y presenta forma esférica, estando emplazado en la plaza central del «campus», con magníficas vistas hacia todas las direcciones. La capacidad prevista es de 700.000 volúmenes, que pueden ser consultados por unos 1.250 estudiantes. En un futuro previsible, y con auxilio de fáciles ampliaciones, pueden llegarse a triplicar las cifras citadas. El núcleo central y los pilares de hormigón constituyen la estructura vertical, desde la que se extienden las vigas que soportan las plantas. La mayor parte de estos elementos se han dejado vistos.

  14. Instantánea de los cánceres de cerebro y del sistema nervioso central

    Science.gov (United States)

    Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cerebro y del sistema nervioso central; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

  15. Electronic detection of nuclear radiations; Deteccion Electronica de radiaciones nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Campos, J.

    1972-07-01

    This report is the first draft of one of the chapters of a book being prepared under the title: Topics on Practical Nuclear Physics. It is published as a report because of i ts immediate educational value and in order to include in its final draft the suggestions of the readers. (Author)

  16. Thermal analysis of the heat recuperator of a combined cycle thermoelectric central; Analisis termico del recuperador de calor de una central termoelectrica de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Romero Paredes, Hernando; Sanchez, I.; Lazcano, L. C.; Ambriz, Juan Jose; Alvarez, M. [Universidad Autonoma Metropolitana-Iztapalapa, Mexico, D. F. (Mexico); Gonzalez, O. [Comision Federal de Electricidad, Tula (Mexico)

    1996-12-31

    The thermoelectric centrals of the combined cycle type (Brayton Cycle and Rankine Cycle) present a series of opportunities to increase the efficiency of the combined cycle or of the generated power. This paper shows the methodology for the performance of energy balances in a heat recuperator (H. R.), typically employed in the combined cycle stations operating in Mexico, for the assessment of the energy harnessing in the different sections conforming a H. R. The effect of the installation of evaporative coolers and/or an absorption cooling system at the gas turbine compressor intake on the steam generation in the heat recuperator, is evaluated. This extra generation of steam is quantified for its potential use in the same absorption refrigeration system. From the assessment, it follows up that the steam generation in the H.R. is inversely proportional to the ambient temperature and that, although the increased amount of steam generated can not be harnessed in total by the steam turbine, the remaining fraction is good enough to cover the heat demand for the operation of the refrigeration system. [Espanol] Las centrales termoelectricas del tipo ciclo combinado (ciclo Brayton y ciclo Rankine) presentan un conjunto de oportunidades para incrementar la eficiencia del ciclo combinado o bien la potencia generada. En el presente trabajo se expone la metodologia para realizar los balances de energia en un recuperador de calor (R.C.) tipicamente utilizado en las Centrales de Ciclo Combinado (CCC) que operan en Mexico, para evaluar el aprovechamiento de la energia en las diferentes secciones que conforman un R.C. Se evalua el efecto que tiene la instalacion de enfriadores evaporativos y/o un sistema de enfriamiento por absorcion en la succion del compresor de la turbina de gas sobre la generacion de vapor en el recuperador de calor. Se cuantifica esta generacion extra de vapor para su posible utilizacion en el mismo sistema de refrigeracion por absorcion. De la evaluacion se

  17. Tiempo de espera y su relación con la satisfacción de los usuarios de la farmacia central de un hospital general de Lima

    OpenAIRE

    Ericson Gutierrez; Willy Ramos; Martha Uribe; Ortega-Loayza, Alex G; Christian Torres; Montesinos; Oscar León; Carlos Galarza

    2009-01-01

    Para determinar la influencia del tiempo de espera sobre la satisfacción del usuario en la farmacia central del Hospital Nacional Dos de Mayo (HNDM), se realizó un estudio transversal donde se registró los tiempos de espera por cada subproceso de atención (facturación, pago en caja y entrega de medicamentos) mediante la observación directa de los usuarios. Se evaluó el nivel de satisfacción del usuario según una escala Likert. Se incluyó 150 usuarios, 59% fueron mujeres, la edad promedio fue ...

  18. Heat transfer equipment performance diagnosis of auxiliary systems in electric power stations; Diagnostico de comportamiento de equipo de transferencia de calor de sistemas auxiliares de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz Esparza Gutierrez, Rogelio [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    In this article the methodology followed to diagnose the performance of the equipment where heat is transferred from the feed water, condensate and circulation water systems in fossil power plants (FPP). The data collection is made with the unit in normal operation, using local instrumentation without taking the equipment out of service for its installation. The equipment diagnosis is made through the analysis of the collected data in actual operation and the design data; for this purpose a thermal balance of the interested systems is performed to obtain all the conditions an operation data. Later on the performance indicative parameters (PIP) of actual operation and design are calculated and compared one against the other. Such a comparison reveals the performance deterioration and the possible equipment faults. The data obtained and the supplementary information are stored in a data base whose objective is that Comision Federal de Electricidad has on hand a prompt access to them in order to control the performance, compare them among similar units and power stations, and inclusively verify possible recurrent causes of low availability in the referred systems. [Espanol] En este articulo se presenta la metodologia seguida para diagnosticar el comportamiento de equipos en los que se transfiere calor de los sistemas de agua de alimentacion, condensado y circulacion de las centrales termoelectricas (CTE). La toma de datos se realiza con la unidad en operacion normal, utilizando instrumentacion local sin necesidad de sacar de servicio a los equipos para su instalacion, ya que se ocupan los mismos puntos para instrumentos con que cuentan por diseno. El diagnostico de los equipos se realiza mediante el analisis de los datos recopilados, tanto de operacion real como de diseno; para ello, se efectua un balance termico de los sistemas de interes para obtener todas las condiciones y los datos de operacion. Posteriormente, se calculan los parametros indicativos de

  19. Accidentes en plantas nucleares de electricidad y el riesgo de cáncer

    Science.gov (United States)

    Hoja informativa acerca de los riesgos del cáncer asociados con accidentes en plantas nucleares de electricidad. Incluye información para pacientes con cáncer que viven en una zona que puede haber sido afectada por un accidente en una planta nuclear.

  20. Central Bank independence in Latin America La independencia de la Banca Central en América Latina

    Directory of Open Access Journals (Sweden)

    Junguito Bonnet Roberto

    1996-06-01

    Full Text Available This article describes the origin and evolution of the central banks of Argentina, Brazil, Chile, Colombia, Mexico, and Venezuela, and analyzes their respective institutional structures. It also studies the contribution of the central bank to stabilization and the problems for maintaining this independence into the future.Este artículo describe el origen y la evolución de los Bancos Centrales de Argentina, Brasil, Chile, Colombia, México y Venezuela, y analiza sus respectivas estructruras institucionales. También estudia la contribución de la banca central a la estabilización y los problemas para que esta independencia se mantenga en el futuro.

  1. Generating power stations and optimization energetic of processes; Centrales generadoras y optimacion energetica de procesos

    Energy Technology Data Exchange (ETDEWEB)

    Gutierrez Ramirez, Ranulfo; Fernandez Montiel, Manuel Francisco [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    1999-07-01

    Some recent experiences of the Management of Thermal Processes of the Instituto de Investigaciones Electricas (IIE) related to the works on generating power stations of electricity, plants of cogeneration and energy saving are presented. [Spanish] Se presentan algunas experiencias recientes de la Gerencia de Procesos Termicos del Instituto de Investigaciones Electricas (IIE) relacionadas con los trabajos sobre centrales generadoras de electricidad, plantas de cogeneracion y ahorro de energia.

  2. Nuclear data banks generation by interpolation; Generacion de bancos de datos nucleares mediante interpolacion

    Energy Technology Data Exchange (ETDEWEB)

    Castillo M, J. A

    1999-07-01

    Nuclear Data Bank generation, is a process in which a great amount of resources is required, both computing and humans. If it is taken into account that at some times it is necessary to create a great amount of those, it is convenient to have a reliable tool that generates Data Banks with the lesser resources, in the least possible time and with a very good approximation. In this work are shown the results obtained during the development of INTPOLBI code, use to generate Nuclear Data Banks employing bicubic polynominal interpolation, taking as independent variables the uranium and gadolinia percents. Two proposal were worked, applying in both cases the finite element method, using one element with 16 nodes to carry out the interpolation. In the first proposals the canonic base was employed, to obtain the interpolating polynomial and later, the corresponding linear equation systems. In the solution of this systems the Gaussian elimination methods with partial pivot was applied. In the second case, the Newton base was used to obtain the mentioned system, resulting in a triangular inferior matrix, which structure, applying elemental operations, to obtain a blocks diagonal matrix, with special characteristics and easier to work with. For the validation tests, a comparison was made between the values obtained with INTPOLBI and INTERTEG (create at the Instituto de Investigaciones Electricas (MX) with the same purpose) codes, and Data Banks created through the conventional process, that is, with nuclear codes normally used. Finally, it is possible to conclude that the Nuclear Data Banks generated with INTPOLBI code constitute a very good approximation that, even though do not wholly replace conventional process, however are helpful in cases when it is necessary to create a great amount of Data Banks.

  3. Caracterización de la zona de alteración Central II, Bloque San Rafael, provincia de Mendoza

    OpenAIRE

    M.F. Gargiulo; N. Rubinstein; F. Carpio; J. Salvarredi

    2007-01-01

    Se presenta el estudio petrográfico de las muestras de superficie correspondientes a la zona de alteración Central II, localizada en el Bloque San Rafael, provincia de Mendoza (34°54'56" S; 68°37'02" O). La misma está relacionada a la intrusión de un cuerpo hipabisal de composición riolítica alojado en una sucesión de rocas volcánicas y volcaniclásticas de la sección superior del Grupo Choiyoi. La zona de alteración está representada por sericitización generalizada a la que se sobreimponen br...

  4. Memoir 1985. Instituto Nacional de Investigaciones Nucleares

    International Nuclear Information System (INIS)

    A brief review of the National Institute of Nuclear Research is given and its activities in 1985 summarized, among which were the Institute's fabrication of nuclear fuel rods, advisory and technical support of the national nucleoelectric program, encouragement of the utilization of nuclear techniques in farming, livestock breeding, industry and health, improving processes in radioisotope production, construction of a metrology building for ionizing radiation measurement, training of manpower for the nucleoelectric industry, for applying nuclear techniques, and the assemblying of a pelletron electron accelerator. (m.r.)

  5. Los mamíferos marinos en la costa central de Oaxaca Marine mammals along the central coast of Oaxaca

    Directory of Open Access Journals (Sweden)

    Juan Meraz

    2008-06-01

    Full Text Available Con la finalidad de conocer las especies de mamíferos marinos que se encuentran en la costa central de Oaxaca, se elaboró un listado comentando las características de los registros obtenidos. Se incluyeron las observaciones hechas a lo largo de 30 recorridos por mar, entre junio de 1999 y enero de 2004, realizadas entre las bahías de Huatulco y la playa de La Escobilla. Adicionalmente se incluyeron registros de animales varados, así como observaciones realizadas desde la costa. Se presentan comentarios sobre el registro de 8 especies en la zona, incluyendo las localidades y fechas de los avistamientos. Stenella attenuata es la especie más abundante, y la zona de Zipolite-Isla Roca Blanca la localidad con el mayor número de avistamientos. Dado el crecimiento turístico del lugar, es importante contar con este tipo de registros ya que es poco lo que se sabe sobre estas especies en esta porción de la costa oaxaqueña.With the aim of documenting the species of marine mammals that occur along the central coast of Oaxaca, a list with the characteristics of the records was elaborated based on observations made throughout 30 surveys from Huatulco Bays to La Escobilla beach between June 1999 and January 2004. Additional records from stranded animals are included, as well observations from the coast. Comments on 8 species are presented, including localities and dates of sightings. Stenella attenuata is the most abundant species. Zipolite-Roca Blanca island was the locality with the highest number of sightings. This records are important to promote conservation due growth of tourism in the area, given that Oaxaca coast is poorly known regarding marine mammals.

  6. Criterios sobre la uniformidad de riego en cultivos protegidos de las provincias centrales

    Directory of Open Access Journals (Sweden)

    Miriel Ajete Gil

    2011-01-01

    Full Text Available El presente trabajo tiene como objetivo evaluar aspectos técnicos en sistemas de riego de las provincias centrales del país pertenecientes al Programa de Cultivos Protegidos del MINAG. A partir de la puesta en explotación de los primeros módulos comienzan a presentarse deficiencias en la uniformidad del riego. En las casas de posturas, en Camagüey se ensayó una solución alternativa utilizando el emisor bailarina con resultados preliminares aceptables, experiencia que se extendió posteriormente a otros módulos. Además se realizaron evaluaciones de uniformidad del riego en cuatro provincias, los resultados ratifican la calidad del riego por goteo con el emisor Twin Drip utilizado en cultivos protegidos, mientras en las casas de posturas con el emisor microjet de 2 x 1400 de 1 mm de producción nacional los resultados fueron ineficientes, y con el emisor "bailarina" fueron aceptables.

  7. Plant endemics to Sierra de Gredos (central Spain: taxonomic, distributional, and evolutionary aspects

    Directory of Open Access Journals (Sweden)

    García, Bernardo

    2008-12-01

    Full Text Available Causes related to a low number of endemics to Sierra de Gredos (central Iberian Peninsula are poorly understood. Taxonomic, distributional and genetic aspects of the 12 endemic taxa (species and subspecies are herein discussed. New populations found in the last years provide new chorological reports and taxa to science. As a result, we extend the distribution range of Pseudomisopates rivas-martinezii and describe a new subspecies (Teucrium oxylepis subsp. Gredense. Genetic variation was investigated by sequencing the ITS (Internal Transcribed Sequence region, which is a widespread nuclear DNA region used to detect significant sequence divergence at the species and population levels. At the species level, only eight endemics to this large mountain range (c. 4,800 km2 indicates both limited speciation events coupled with their persistence, despite the high species richness of the flora of Sierra de Gredos (>2,500. According to the levels of ITS sequence divergence, significant isolation processes may have predated the Quaternary in Sierra de Gredos to account for divergence of the monotypic genus Pseudomisopates from its closest relatives (Misopates, Acanthorrhinum. Isolation of the other seven endemic species from their closest relatives has been a more recent process, as revealed by the limited ITS sequence variation obtained in this study. At the population level, no net nucleotide substitutions were observed between distant populations of the endemic species: Antirrhinum grosii, Astragalus devesae, Centaurea avilae, Dianthus gredensis, Echinospartum barnadesii, Pseudomisopates rivas-martinezii, Santolina oblongifolia. In contrast, the three populations of Sedum lagascae displayed a relatively high number (4 of nucleotide substitutions. These results, together with limited morphological differentiation, may reflect insufficient population isolation of seven of the eight endemic species of Sierra de Gredos in the Quaternary. Recurrent population

  8. Empleo de paneles compuestos por subproductos de centrales térmicas en fachadas trasdosadas

    Directory of Open Access Journals (Sweden)

    Alba, M. D.

    2012-06-01

    Full Text Available Two new recycled gypsum boards are proposed which have a better environmental performance due to the fact that they are made of traditional materials and new recycled ones derived from biomass (waste generated during the extraction of olive pomace and the coal combustion produced in power plants. Before using these wastes as raw materials, they have been submitted to chemical analysis and the panels made of them have been tested to prove their mechanical, thermal and fire performance. Subsequently, the new recycled panels have been implemented in a traditional facade solution to verify their functional and thermal feasibility. Finally, the results obtained show that the panels made of biomass ashes have a better mechanical and thermal performance than those made of coal ashes and that they can provide a sustainable alternative to the traditional facade materials due to its lower environmental impact based on the reduction of raw materials consumption and industrial waste. The new materials comply with the specifications of Spanish Technical Building Code in the region evaluated

    Se presentan dos nuevas tipologías de paneles para trasdosado de fachadas, que proporcionan como mejora ambiental la combinación de materiales tradicionales con nuevos materiales reciclados obtenidos de residuos procedentes de la combustión de orujillo y de carbón en centrales térmicas. Con anterioridad a su uso, dichos residuos han sido sometidos a exhaustivos ensayos químicos y los paneles fabricados a partir de los mismos, a ensayos mecánicos, térmicos y de resistencia al fuego que justifican su empleo. Posteriormente, los nuevos paneles hechos a base de materiales reciclados se han implementado como trasdosado de una solución de fachada convencional para verificar su viabilidad funcional y el buen comportamiento aislante del conjunto. Finalmente, de los resultados obtenidos se extrae que los paneles fabricados con cenizas de orujillo tienen un mejor

  9. EL TRABAJO INVISIBLE DE MENORES DE BAZURTO. MERCADO CENTRAL DE CARTAGENA DE INDIAS

    Directory of Open Access Journals (Sweden)

    Hortensia Naizarra Rodriguez

    2000-08-01

    Full Text Available A un cuando la motivación principal del trabajo infanto juvenil sigue siendo la ayuda a la familia, hay factores de orden cultural que 10 propician. Para las familias de origen rural el trabajo infantil está relacionado con la imagen del menor como símbolo y unidad económica de producción ya que existe la creencia entre los padres que los niños son veloces, ágiles, tienen mucha destreza y voluntad para cierto tipo de trabajo, y por tanto se convierten en una ayuda; pero tras esta denominada ayuda lo que se observa es una carga de responsabilidades que deterioran física, social y emocionalmente al menor y disminuyen ostensiblemente sus opciones de desarrollo humano.

  10. Supervisado del deshidratado de zanahorias con imagen de resonancia magnética nuclear.

    OpenAIRE

    Jimenez Ariza, Heidi Tatiana; Correa Hernando, Eva Cristina; Diezma Iglesias, Belen; Barreiro Elorza, Pilar; Fernández Valle, M. Encarnacion; Ruiz-Altisent, Margarita

    2013-01-01

    La imagen de resonancia magnética nuclear (RMN) aplicada en el análisis de alimentos permite evaluar y cuantificar la humedad o grasa en un material entre otros. En el caso del análisis de productos deshidratados y el estudio evolutivo de la pérdida de agua a lo largo de la operación de secado, puede proporcionar información espacio temporal, importante para definir y mejorar las características del proceso orientado hacia la mejora de la calidad en el producto final. En el presente trabajo s...

  11. Los Discursos de Legitimación de la Industria Nuclear Española

    OpenAIRE

    Luis Sánchez Vázquez

    2009-01-01

    La controversia sobre el uso de la energía nuclear es un tema clave en el actual debate sobre el modelo energético. El análisis de esta situación desde la perspectiva de los estudios de Ciencia y Tecnología para la Paz ayuda a esclarecer ciertos condicionantes de la introducción y desarrollo de opción energética en nuestro país y en el contexto internacional, con objeto de contribuir al esclarecimiento de ciertas posiciones dentro del panorama energético actual. En este marco, el trabajo int...

  12. Caracterización de la zona de alteración Central II, Bloque San Rafael, provincia de Mendoza

    Directory of Open Access Journals (Sweden)

    M.F. Gargiulo

    2007-09-01

    Full Text Available Se presenta el estudio petrográfico de las muestras de superficie correspondientes a la zona de alteración Central II, localizada en el Bloque San Rafael, provincia de Mendoza (34°54'56" S; 68°37'02" O. La misma está relacionada a la intrusión de un cuerpo hipabisal de composición riolítica alojado en una sucesión de rocas volcánicas y volcaniclásticas de la sección superior del Grupo Choiyoi. La zona de alteración está representada por sericitización generalizada a la que se sobreimponen brechas y venas silíceas, ocasionalmente con textura drusiforme y con bandas tapizadas por agregados diseminados de pirita y calcopirita subordinada, a las que acompaña escasa arsenopirita. Las brechas y venas silíceas conforman una faja de dirección ONO (azimut 290° - 300° e inclinación vertical, en las que se han reconocido texturas de cuarzo hidrotermal de crecimiento primario, de recristalización y de reemplazo. Entre estas texturas se destacan las crustificaciones complejas, el bandeamiento coloforme y los pseudomorfos de cuarzo según calcita en enrejado, a las que se asocia la presencia de adularia con morfologías sub-rómbica, rómbica y pseudo-acicular. Este conjunto de texturas y morfologías permite establecer que se trata de un sistema epitermal de baja sulfuración con paleozonas de ebullición ascendente.

  13. L'energia nuclear: pot resoldre el problema de l'escalfament global?

    OpenAIRE

    Puig, Josep

    2006-01-01

    Sovint es diu que l'energia nuclear pot ser la solució pel problema de l'escalfament global: l'article presenta dades i raonaments per concloure que, si tota l'electricitat mundial fos d'origen nuclear, l'escalfament global es reduiria tan sols en un 12%. També s'analitzen els subproductes militars de la indústria de l'energia nuclear "civil" i la problemàtica dels residus radioactius de l'energia nuclear de fissió. També s'analitza l'alt grau de dificultats que presenta l'energia nuclear de ...

  14. Comparación de las configuraciones de torre única y multitorre en una planta térmica solar de receptor central operada con sales fundidas y sistema de almacenamiento

    OpenAIRE

    Loizaga Medina, Ignacio de

    2013-01-01

    El presente proyecto de fin de carrera tiene como objetivo estudiar la configuración de multitorre en centrales térmicas de concentración solar como solución que permita el aumento de la eficiencia de este tipo de centrales. Además, las centrales con configuración multitorre se comparan en el proyecto con la tecnología más usada actualmente de receptor único central. Para la realización de los cálculos y la obtención de resultados se ha hecho uso de la herramienta de softwar...

  15. Permission of change of limits in the vapor generators of the Atucha I Nuclear Central

    International Nuclear Information System (INIS)

    In the mark of the modification of the Atucha-I Nuclear Central Installation (CNA-I) as consequence of the Introduction of the System 'Second Drain of Heat' (SSC), the Entity Responsible for the CNA-I (NASA) requested authorization to the Nuclear Regulatory Authority (ARN) to modify the value of the minimum level of water in the secondary side in the Steam generators (GVs) to activate the signal 'shoot of the Cut of the Reactor' (RESA-LLV). As the level in the GVs is one of those parameters that are used to shoot the Emergency Feeding System (RX), component of the SSC System, also was analyzed the change in the activation of the shoot signal of the 'Second Drain of Heat' (2SSC-LLV). The ARN uses for the study of the nuclear safety of nuclear power plants, the series of prediction programs RELAP5/MOD3.X. It participates of the evaluation and maintenance activities of these codes through specific agreements with the U.S. Nuclear Regulatory Commission (US-NRC). It is necessary to account with programs of this type since the ARN it licenses the construction and operation of Nuclear Power Plants (NPPs) and other outstanding facilities and it inquires its operation according to its own standards. With these tools its are auditing the calculations that the Responsible Entities of the operation make to guarantee the operability of the NPPs assisting the mentioned standards. The analysis with computational codes is used as a tool to achieve the best understanding in the behavior of the plant in union with the engineering approach, the manual calculations, the data analysis and the experience in the operation of the machine. (Author)

  16. Organización territorial de los antiguos mayas de Belice Central

    DEFF Research Database (Denmark)

    Helmke, Christophe; Awe, Jaime

    2008-01-01

    se centran predominantemente sobre cada sitio investigado. Las exploraciones en Belice Central de las cuatro últimas décadas, sin embargo, han sacado a la luz numerosas piezas clave que aportan datos epigráficos, incluyendo “Glifos Emblema”. Vistos en conjunto, los datos arqueológicos y epigráficos...

  17. Assessment of individual radionuclide distributions from the Fukushima nuclear accident covering central-east Japan.

    Science.gov (United States)

    Kinoshita, Norikazu; Sueki, Keisuke; Sasa, Kimikazu; Kitagawa, Jun-ichi; Ikarashi, Satoshi; Nishimura, Tomohiro; Wong, Ying-Shee; Satou, Yukihiko; Handa, Koji; Takahashi, Tsutomu; Sato, Masanori; Yamagata, Takeyasu

    2011-12-01

    A tremendous amount of radioactivity was discharged because of the damage to cooling systems of nuclear reactors in the Fukushima No. 1 nuclear power plant in March 2011. Fukushima and its adjacent prefectures were contaminated with fission products from the accident. Here, we show a geographical distribution of radioactive iodine, tellurium, and cesium in the surface soils of central-east Japan as determined by gamma-ray spectrometry. Especially in Fukushima prefecture, contaminated area spreads around Iitate and Naka-Dori for all the radionuclides we measured. Distributions of the radionuclides were affected by the physical state of each nuclide as well as geographical features. Considering meteorological conditions, it is concluded that the radioactive material transported on March 15 was the major contributor to contamination in Fukushima prefecture, whereas the radioactive material transported on March 21 was the major source in Ibaraki, Tochigi, Saitama, and Chiba prefectures and in Tokyo.

  18. Analysis of pumping systems to large flows of cooling water in power plants; Analisis de sistemas de bombeo para grandes flujos de agua de enfriamiento en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Sanchez, Ramon; Herrera Velarde, Jose Ramon; Gonzalez Sanchez, Angel [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)]. E-mail: rsanchez@iie.org.mx; jrhv@iie.org.mx; ags@iie.org.mx

    2010-11-15

    Accurate measurement of large water flows remains being a challenge in the problems of implementation of circulating water systems of power plants and other applications. This paper, presents a methodology for the analysis in pumping systems with high rates of water in power plants, as well as their practical application and results in pipelines water flow of a thermoelectrical power plant of 350 MW. In this power plant, the water flow per pipeline for a half of condenser oscillates around 7 m{sup 3}/s (14 m{sup 3}/s per power generating unit). In this analysis, we present the techniques used to measure large flows of water with high accurately, as well as the computational model for water circulating system using PIPE FLO and the results of practical application techniques. [Spanish] La medicion precisa de grandes flujos de agua, sigue siendo un reto en los problemas de aplicacion de sistemas de agua de circulacion de centrales termoelectricas, entre otras aplicaciones. En este articulo, se presenta una metodologia para el analisis de sistemas de bombeo con grandes flujos de agua en centrales termoelectricas, asi como, su aplicacion practica y los resultados obtenidos en los ductos de agua de circulacion de una central generadora con unidades de 350 MW. En esta central, los flujos por caja de agua oscilan alrededor de los 7 m{sup 3}/s (14 m{sup 3}/s por unidad generadora). En el analisis, se presentan las tecnicas utilizadas para medir con precision grandes flujos de agua (tubo de Pitot), asi como, el modelado del sistema de agua de circulacion por medio de un paquete computacional (PIPE FLO) y resultados obtenidos de la aplicacion de dichas tecnicas.

  19. Puberdade precoce central como única manifestação de cisto aracnoide supraselar Central precocious puberty as a sole manifestation of suprasellar arachnoid cyst

    Directory of Open Access Journals (Sweden)

    Adriana Mangue E. Aun

    2011-03-01

    Full Text Available OBJETIVO: Os cistos aracnoides são achados raros. Em 10% dos casos, sua localização é supraselar e ocorrem quase exclusivamente em crianças. Em geral, apresentam manifestações neurológicas e visuais, sendo incomum a puberdade precoce central como sinal clínico de sua presença. DESCRIÇÃO DO CASO: Menina avaliada aos dois anos e sete meses por telarca iniciada com um ano e oito meses e pubarca e axilarca com dois anos, com aumento da velocidade de crescimento (13cm/ano e da idade óssea (sete anos e um mês. Ao exame, apresentou peso de 22,6kg (Z+4,0, estatura de 106cm (Z+3,5 e Tanner de M3P2. Exames realizados: teste de estímulo com GnRH (LH basal 8,3 UI/L, pico aos 30 minutos 94,3 UI/L; FSH basal=10,1 UI/L, pico aos 30 minutos 29,5 UI/L, ressonância nuclear magnética de crânio com cisto aracnoide supraselar e demais testes de função hipofisária normais. Foi iniciado tratamento com análogo de GnRH. Atualmente, aos quatro anos e três meses com estadio puberal M3P2, velocidade de crescimento e desenvolvimento neuropsicomotor normais para a idade. COMENTÁRIOS: A puberdade precoce central pode ser manifestação única de um cisto aracnoide, sendo essenciais o diagnóstico e o tratamento precoces, além de seguimento prolongado, uma vez que outras disfunções hipofisárias podem ocorrer tardiamente.OBJECTIVE: Arachnoid cysts (AC are a rare finding; 10% of them are suprasellar and occur almost exclusively in children. They are frequently associated with neurological and visual manifestations. Central precocious puberty as a sole manifestation is uncommon. CASE DESCRIPTION: Girl evaluated at the age of two years and seven months. She started breast development at the age of one year and eight months, pubic and axillary hair at the age of two years, with growth velocity acceleration (13cm/year and increased bone age (seven years and one month. On exam: weight: 22.6kg (Z+4.0, height: 106cm (Z+3.5 and puberal stage of B3P2. The Gn

  20. Medidas experimentais de parâmetros termohidráulicos no núcleo de reator nuclear de pesquisa

    OpenAIRE

    Mesquita, Amir Zacarias; Costa, Antônio Carlos Lopes da; Souza, Rose Mary Gomes do Prado; Palma, Daniel Artur Pinheiro

    2012-01-01

    O reator nuclear de pesquisa TRIGA IPR-R1 possui uma potência térmica máxima de 250 kW e é um reator de piscina refrigerado por circulação natural de água leve. Está localizado no Centro de Desenvolvimento de Tecnologia Nuclear (CDTN), em Belo Horizonte, que é um instituto de pesquisa da Comissão Nacional de Energia Nuclear (CNEN/Brasil). O núcleo do IPR-R1 tem uma configuração anular com seis anéis concêntricos. Os canais de refrigeração se estendem desde a grade espaçadora infer...

  1. A position paper for a central procurement organization for the nuclear power industry

    International Nuclear Information System (INIS)

    This paper integrates the results of numerous nuclear utility industry meetings with commercial business practices. The Central Procurement Organization (CPO) is designed to achieve an immediate 30%--50% reduction in total procurement, engineering qualification, warehousing, and distribution cost. Three (3) areas define a CPO success criteria: (1) Lean, credible, and cost-effective issues discussed include facility cost, operational cost, staff expertise, product priorities, warehousing, and distribution, (2) Common technical, commercial, and quality requirement issues discussed include current industry practices and proposed future methodologies, and (3) Financial survivability issues which are the most critical since the CPO must exist during changing internal and external utility environments

  2. Producción de leche en pastoreo de praderas cultivadas: una alternativa para el Altiplano Central

    Directory of Open Access Journals (Sweden)

    Carlos Arriaga Jordán

    1999-01-01

    Full Text Available Se presentan resultados que definen a la producción de leche en pastoreo intensivo de praderas cultivadas como alternativa para una ganadería competitiva y sostenible en el Altiplano Central de México. Se revisan resultados del efecto en los rendimientos de leche del tipo de pradera, el sistema de pastoreo y la respuesta a la suplementación con concentrados.

  3. Seguimento de portadores de coriorretinopatia serosa central por meio da tomografia de coerência óptica Evaluation of central serous chorioretinopathy with optical coherence tomography

    Directory of Open Access Journals (Sweden)

    Otacílio de Oliveira Maia Júnior

    2006-04-01

    Full Text Available OBJETIVO: Avaliar a tomografia de coerência óptica como método objetivo de diagnóstico e de seguimento da coriorretinopatia serosa central. MÉTODOS: Estudo observacional descritivo de 16 (dezesseis olhos de portadores de coriorretinopatia serosa central unilateral, em fase aguda. Estes pacientes foram submetidos à medida da acuidade visual e a exame oftalmológico completo, incluindo biomicroscopia da mácula, angiofluoresceinografia e tomografia de coerência óptica. Nenhum dos pacientes foi submetido a qualquer tipo de tratamento. RESULTADO: Dos 16 casos consecutivos de coriorretinopatia serosa central, 12 pacientes completaram o seguimento até a resolução da doença. A idade variou entre 27 e 50 anos, com média de 38,9 anos. A predominância foi do sexo masculino. Na tomografia de coerência óptica, o descolamento da retina neurossensorial foi observado em todos os casos e 33,3% dos pacientes apresentaram descolamento do epitélio pigmentado da retina. Houve diferença significativa em todas as variáveis estudadas, constatando melhora na acuidade visual, diminuição na espessura e no volume macular na resolução da doença. CONCLUSÃO: Tomografia de coerência óptica mostrou boa eficácia para detectar e quantificar alterações maculares em olhos com coriorretinopatia serosa central, podendo ser útil em avaliações clínicas na fase aguda e na resolução da doença.PURPOSE: To evaluate optical coherence tomography as an objective diagnostic and follow-up method for central serous chorioretinopathy. METHODS: Observational descriptive study of 16 (sixteen eyes of 16 patients with unilateral acute central serous chorioretinopathy. These patients had their visual acuity measured and complete ophthalmological examination was performed, including macular slit lamp examination, angiofluoresceinography and optical coherence tomography. No treatment was given to any patient. RESULTS: Of the 16 central serous chorioretinopathy eyes

  4. Estudio geoarqueológico de los registros holocenos del sector central del valle del Ebro

    OpenAIRE

    Constante Orrios, Ana; Peña Monné, José Luis.

    2011-01-01

    La zona de estudio se sitúa en el sector central de la Depresión del Ebro, en un medio geológico formado esencialmente por yesos y en condiciones ambientales semiáridas. El objetivo del trabajo es el análisis geomorfológico y geoarqueológico del entorno de la ciudad de Zaragoza. Los objetivos específicos se centran en el estudio de los registros sedimentarios holocenos de los rellenos de valle, conos aluviales y laderas. Una de las conclusiones más importantes es la definición del nivel de ...

  5. Cooling system at the compressors air inlet of the gas turbines from the Tula`s combined cycle central; Sistema de enfriamiento en la succion del compresor de las turbinas de gas de la central de ciclo combinado de Tula

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez F, Oscar [Comision Federal de Electricidad, Tula (Mexico); Romero Paredes, Hernando; Vargas, Martin; Gomez, Jose Francisco [Universidad Autonoma Metropolitana-Iztapalapa, Mexico, D. F. (Mexico)

    1996-12-31

    It has been formerly evaluated that it is possible to enhance notably the electric power generation in gas turbine power plants by cooling the air at the compressor inlet. It has been pointed out that provided a source of waste heat is available it can be very attractive the use of absorption refrigeration systems. In this paper the technical and the economical benefits of bringing the air inlet temperature down 8 Celsius degrees of the four gas turbines of the Combined Cycle Central of Tula, in the State of Hidalgo (combined cycle central-Tula) are evaluated. The results show that it is possible to achieve an efficiency enhancement of at least 1%, and that in very warm days up to 48 additional Megawatts can be generated, or about 10% of the installed capacity. The final economic result is very encouraging and an annual economical benefit in the order of 50 million pesos can be obtained and the refrigeration units can be amortized in approximately one year. [Espanol] Se ha evaluado anteriormente que es posible mejorar notablemente la capacidad de generacion electrica en plantas que utilizan turbinas de gas, mediante el enfriamiento del aire de succion del compresor. Se ha senalado que en la medida en que se encuentre disponible una fuente termica de desecho puede ser muy atractivo el uso de sistemas de refrigeracion por absorcion. En el presente trabajo se evaluan los beneficios tecnicos y economicos que puede tener el llevar el aire de succion hasta una temperatura de 8 grados Celsius, de las cuatro unidades de gas de la Central de Ciclo Combinado de Tula, Hidalgo (CCC-Tula). Los resultados muestran que es posible alcanzar un aumento en la eficiencia de al menos 1% y que se pueden generar, en dias muy calurosos, hasta 48 MW extras, equivalente al 10% de la capacidad instalada. El resultado economico final es muy alentador y puede llegar a tenerse un beneficio economico del orden de los 50 millones de pesos anuales y las unidades de refrigeracion podran pagarse en

  6. Análisis estructural del extremo sur de la Precordillera Central Sanjuanina

    Directory of Open Access Journals (Sweden)

    P. Giampaoli

    2003-03-01

    Full Text Available La Precordillera Central de San Juan es una faja plegada y corrida de piel fina que está limitada hacia el este por las estructuras de piel gruesa de la Precordillera Oriental. El objetivo de este estudio es describir e interpretar las estructuras encontradas en el extremo sur de esta faja plegada y corrida. Los pliegues presentes en las lomas de Andapaico son asimétricos, abiertos, de tipo chevron y están genéticamente relacionados a la propagación de una falla. Hacia el norte el pliegue es más cerrado y está fragmentado por fallas. La estructura regional consiste en un abanico imbricado de pliegues por propagación de falla y corrimientos fuera de secuencia relacionados al levantamiento de las estructuras de la Precordillera Oriental. El nivel de despegue principal está localizado cerca del techo de la caliza de la Formación San Juan. La evolución de la deformación se produjo en dos etapas. Primero se desarrolla un abanico imbricado de pliegues por propagación de falla como resultado de la migración hacia el antepaís del frente de corrimientos. Luego el levantamiento de la Precordillera Oriental impide la propagación del frente de corrimiento, lo cual pudo disparar la formación de las estructuras fuera de secuencia de la Precordillera Central. El acortamiento horizontal mínimo calculado es de 4,8 km y la estructura regional muestra una disminución del acortamiento en dirección sur que afecta a estructuras de varios órdenes y estilos de deformación.

  7. El reactor nuclear colombiano y la agencia de actores no humanos en los estudios sociales de la ciencia

    OpenAIRE

    Juan Andrés León Gómez

    2009-01-01

    Basándose en su trabajo de grado de historiador sobre los primeros años del programa nuclear colombiano, el autor explora la relevancia del concepto de actor no humano originario de las teorías de actores-red. Se muestra cómo el análisis de la consolidación del Instituto de Asuntos Nucleares debe incluir un objeto inanimado, el reactor nuclear, como actor social fundamental. PALABRAS CLAVES. actores no humanos, comunidad científica, energía nuclear

  8. Modernization of the subsystem man-machine interface for operation of the combined cycle central of Gomez Palacio; Modernizacion del subsistema de interfaz hombre-maquina para operacion de la central de ciclo combinado de Gomez Palacio

    Energy Technology Data Exchange (ETDEWEB)

    Rivas S, Alfonso; Uribe B, Carlos E; Alvarez C, Victor [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2002-07-01

    In order to take care of the modernization of the Combined Cycle Central of Gomez Palacio (CCCGP) of the Comision Federal de Electricidad (CFE), the Instituto de Investigaciones Electricas (IIE), through the Management of Supervision of Processes (GSP) developed the subsystem of Interface Man-Machine (IMM), to replace the workstations that are deteriorated and obsolete by personal computers, maintaining the same functions of the IMM of the present system, including the management and processing functions that at the present time another system makes. Also, to replace the equipment of the concentrators of communications by a PC with greater capacity, than allows improving in general the flexibility and robustness of the system. Among the main functions integrated in the IMM subsystem there are: the communications master with the controllers (equipment SAC), redundancy of servers, database, historical registry storage, alarm management, tabulations, tendency graphs in real time and historical, process diagrams and Control Panels. [Spanish] Con el objeto de atender las necesidades de modernizacion de la Central de Ciclo Combinado Gomez Palacio (CCCGP) de la Comision Federal de Electricidad (CFE), el Instituto de Investigaciones Electricas (IIE), a traves de la Gerencia de Supervision de Procesos (GSP) desarrollo el subsistema de Interfaz Hmbre-Maquina (IHM), para reemplazar las estaciones de trabajo que se encuentran deterioradas y obsoletas por computadoras personales, manteniendo las mismas funciones de la IHM del sistema actual, incluyendo las funciones de administracion y procesamiento que en la actualidad realiza otro sistema. Asimismo, para reemplazar los equipos de los concentradores de comunicaciones por PC con mayor capacidad, que permitan mejorar la flexibilidad y robustez del sistema en general. Entre las principales funciones integradas en el subsistema de IHM se encuentran: el Maestro de comunicaciones con los controladores (equipo SAC), redundancia de

  9. Rol del fallo mecánico en la optimización del mantenimiento en una central nuclear//Role of the mechanical failure during the maintenance optimization in the nuclear power plant

    Directory of Open Access Journals (Sweden)

    Antonio Torres-Valle

    2012-05-01

    Full Text Available Entre las más recientes aplicaciones del Análisis Probabilista de Seguridad (1997 – 2003 de la Central Nuclear Embalse en Argentina, está el Programa de Mantenimiento Orientado a la Seguridad (2006– 2009 el cual se ha desarrollado con el empleo de la metodología de Mantenimiento Centrado en la Confiabilidad (RCM en inglés. El objetivo general del artículo es demostrar la alta contribución de los fallos mecánicos en el diseño de las políticas de mantenimiento de varios sistemas de la instalación a través del empleo de la metodología RCM. La composición, estructura y políticas de explotación de los sistemas tecnológicos de muchas instalaciones con riesgo asociado, similares a las de los sistemas analizados en este estudio, permite inferir que los resultados que se obtendrán serán equivalentes de aplicarse la metodología RCM en dichas instalaciones. Palabras claves: mantenimiento centrado en la confiabilidad, mantenimiento predictivo, mantenimiento preventivo, fallo mecánico, seguridad, confiabilidad, riesgo.______________________________________________________________________________ Abstract One of the most recent applications of Probabilistic Safety Analysis (1997 – 2003 to Embalse Nuclear Power Plant in Argentina, is the Safety Oriented Maintenance Program (2006 – 2009 developed with employment of the Reliability Centered Maintenance (RCM methodology. The general objective of the paper is to demonstrate the high contribution of the mechanical failures in the maintenance program design through the RCM methodology. The composition, structure and operation strategies of the technological systems of many risk associated facilities, similar to the analysed systems included in this study, allow deduce that the results will equivalent in case of application of RCM methodology in such facilities. Key words: reliability centered maintenance (RCM, predictive maintenance, preventive maintenance, mechanical failure, safety

  10. Central térmica de Puente Nuevo – España (I

    Directory of Open Access Journals (Sweden)

    Sánchez Conde, Enrique

    1970-03-01

    Full Text Available The Empresa Nacional Eléctrica de Córdoba, S. A. has built near Córdoba the Puente Nuevo power station, to take advantage of the local coal, mined in the district of Peñarroya, Bélmez and Espiel, which is difficult to export. In addition to the construction difficulties which have had to be overcome, the power station is especially significant because it has been fitted with Spanish machinery, including the electrical and steam generators. This design has been followed by the construction of the power station at Almería and two additional power plants at San Juan de Dios, in Palma de Mallorca. All these installations are now in working order.La Empresa Nacional Eléctrica de Córdoba, S. A., ha montado, cerca de esta ciudad, la Central Térmica de Puente Nuevo para aprovechar los carbones de la zona Peñarroya-Bélmez-Espiel, de escasa salida en el mercado. Aparte de las dificultades constructivas que se han resuelto durante su instalación, la Central es interesante, especialmente, por el logrado intento de utilizar en ella la primera maquinaria de fabricación nacional, tanto en lo que se refiere a generadores eléctricos como a los de vapor. Se ha encabezado así el montaje de una serie que ha tenido su continuación en los dos grupos de la ampliación de la Central Térmica de Almería y en los otros dos de la Central de San Juan de Dios, de Palma de Mallorca, todos ellos funcionando en la actualidad.

  11. Verification and software validation for nuclear instrumentation; Verificacion y validacion de software para instrumentacion nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Gaytan G, E. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Salgado G, J. R. [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico); De Andrade O, E. [Universidad Federal de Rio de Janeiro, Caixa Postal 68509, 21945-970 Rio de Janeiro (Brazil); Ramirez G, A., E-mail: elvira.gaytan@inin.gob.mx [Comision Federal de Electricidad, Gerencia de Centrales Nucleoelectricas, Alto Lucero, Veracruz (Mexico)

    2014-10-15

    In this work is presented a Verification Methodology and Software Validation, to be applied in instruments of nuclear use with associate software. This methodology was developed under the auspices of IAEA, through the regional projects RLA4022 (ARCAL XCIX) and RLA1011 (RLA CXXIII), led by Mexico. In the first project three plans and three procedures were elaborated taking into consideration IEEE standards, and in the second project these documents were updated considering ISO and IEC standards. The developed methodology has been distributed to the participant countries of Latin America in the ARCAL projects and two related courses have been imparted with the participation of several countries, and participating institutions of Mexico like Instituto Nacional de Investigaciones Nucleares (ININ), Comision Federal de Electricidad (CFE) and Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS). In the ININ due to the necessity to work with Software Quality Guarantee in systems for the nuclear power plant of the CFE, a Software Quality Guarantee Plan and five procedures were developed in the year 2004, obtaining the qualification of the ININ for software development for the nuclear power plant of CFE. These first documents were developed taking like reference IEEE standards and regulator guides of NRC, being the first step for the development of the methodology. (Author)

  12. Moviments opositors a infraestructures energètiques. Cas particular de l’energia nuclear i possibles alternatives

    OpenAIRE

    Garriga, Josep

    2012-01-01

    L’objectiu final d’aquest projecte és la proposta d’una alternativa a les centrals nuclears ubicades en territori català. Una alternativa a una font tan fiable però també amb certes característiques que la fan veure amb recel per part de diversos sectors de la societat ( un exemple: la certa alarma social ocasionada per alguns successos com ara el recent de Fukushima ) , requereix fonts energètiques consolidades i no excessivament cares. Per a ferho, es tindran en compte els mo...

  13. RESONANCIA MAGNÉTICA NUCLEAR DEL PRODUCTO GELIFICADO DE LA REACCIÓN DE CANNIZZARO

    Directory of Open Access Journals (Sweden)

    Lilia Fernández Sánchez

    2015-01-01

    Full Text Available Se presenta n los espectros de resonancia magnética nuclear ( RMN de protón 1 H, de carbón 13 C y bidimensionales , del produc to de una síntesis orgánica verde de óxido - reducción en la r eacción de Cannizzaro. El producto fue reportado como un gel triboquímico y elucidado por análisis de infrarrojo IR , ray os X y micrografía de barrido ( SEM . Los resultados en este artículo confirman su estructura a través de diversas técnicas de RMN y evalúan el contenido de benzoato de sodio y alcohol bencílico en la muestra e mpleada en la espectroscopia a través del examen de los valores de las integrales en la s señales de RMN de 1 H. El resultado del estudio indica que el alcohol bencílico se encuentra en un 33.44% mol (fase dispersa con respecto al cont enido de benzoato de sodio (fase continua . Estos resultado s confirma n la estruct ura de gel que con el tiempo pierde a la fase dispersa el alcohol produciendo un xerogel

  14. Del derecho al poder: el camino central de la obra de Norberto Bobbio

    OpenAIRE

    Ruiz Miguel, Alfonso

    2005-01-01

    En este artículo, el autor propone como hilo conductor de la vasta obra de N. Bobbio a la filosofía del Derecho y a la filosofía política, dos caminos centrales que pueden ser vistos también como un único camino. Se exponen los rasgos de este hilo conductor en dos pasos sucesivos: primero, describiendo las estrechas relaciones que según Bobbio mantienen la filosofía jurídica y la filosofía política en su propuesta metodológica sobre la estructura temática de una y otra materia; y, segundo, si...

  15. Evaluacion del componente central y periferico de fatiga muscular en pacientes neuropaticos y miopaticos

    Directory of Open Access Journals (Sweden)

    L. G. Cohen

    1983-09-01

    Full Text Available Utilizando un método de cuantificación del electromiograma, se investigaron parte de los mecanismos centrales y periféricos responsables de la fatiga muscular en enfermos crónicamente denervados y en pacientes con compromiso muscular primitivo. Se observó en los denervados que los mecanismos de fatiga muscular, no difieren mayormente de los observados en el grupo de sujetos sanos, por el contrario, en los miopáticos a más del componente central, existen otros de orden periférico, tales como la pérdida de unidades motoras funcionantes durante el esfuerzo y el bloqueo temporario de la transmisión neuromuscular, que contribuye al desarrollo de la fatiga.

  16. 4. Mexican School of Nuclear Physics. Papers; 4. Escuela Mexicana de Fisica Nuclear. Notas

    Energy Technology Data Exchange (ETDEWEB)

    Aguilera, E.F.; Hernandez, E.; Hirsch, J. (eds.)

    2005-07-01

    The IV Mexican School of Nuclear Physics, organized by the Nuclear Physics Division of the Mexican Physics Society, takes place from June 27 to July 8, 2005 in the Nuclear Sciences and of Physics Institutes of the UNAM and in the National Institute of Nuclear Research (ININ). This school, as the previous ones, it was guided the students of the last semesters of the career of Physics, of the Post grade of the same specialty, and of other adjacent careers. To give the students a current vision of some of the topics more important of the nuclear physics and their relationship with other near areas of the physics it was the objective of this School. The School covered a wide range of theoretical and experimental courses, imparted in its majority by Mexican expert professor-investigators in the matter to who we thank them the one effort and the quality of their presentations, reflected in the content of this document. The answer of the students to the convocation was excellent, 31 students presented application for admission coming from the following institutions: Meritorious Autonomous University de Puebla, National Institute of Nuclear Research, Technological Institute of Orizaba, National Polytechnic Institute, The University of Texas at Brownsville, Autonomous University of the State de Mexico, Autonomous University of the State of Morelos, Autonomous University of Baja California, Autonomous University of San Luis Potosi, University of Guadalajara, University of Guanajuato, National Autonomous University of Mexico, University of Texas, at El Paso and University Veracruzana. They were admitted to the 22 students with the higher averages qualifications of the list of applicants. The organizers of this school thank the financial support granted by the following sponsor institutions: Nuclear Sciences Institute, UNAM, Physics Institute of UNAM, Coordination of the Scientific Research UNAM, National Institute of Nuclear Research, Nuclear Physics Division of the Mexican

  17. Fuentes documentales de la administración central: el archivo general de la administración

    Directory of Open Access Journals (Sweden)

    María Luisa CONDE VILLAVERDE

    2010-02-01

    Full Text Available Antes de iniciar la exposición sobre las fuentes de la Administración Central en un sentido tan amplio como el que supone hablar de su Archivo General, me parece necesario puntualizar algunos aspectos básicos tanto sobre el concepto de Administración y su estructura como sobre la situación de la historiografía y de sus fuentes, lo que permitirá una comprensión mucho más completa y sistematizada de cómo se han formado los fondos de Archivo que las custodia.

  18. Un Estudio sobre la Autonomía Administrativa del Banco Central de Venezuela

    OpenAIRE

    Armando Barrios Ross; Abelardo Daza

    2000-01-01

    El propósito básico de este estudio es contribuir a la comprensión de los factores favorables y los elementos de potencial amenaza para que los bancos centrales ejerzan su autonomía institucional. Para el logro de este propósito, se utiliza la metodología de estudio de casos, examinando la experiencia de Venezuela durante dos eventos particulares: la crisis financiera acaecida en el período 1994-1996 y el manejo de la política cambiaria durante los años 1995-96. Ambos eventos sucedieron duran...

  19. Neonatal mortality in intensive care units of Central Brazil Mortalidade neonatal em unidades de cuidados intensivos no Brasil Central

    Directory of Open Access Journals (Sweden)

    Claci F Weirich

    2005-10-01

    Full Text Available OBJECTIVE: To identify potential prognostic factors for neonatal mortality among newborns referred to intensive care units. METHODS: A live-birth cohort study was carried out in Goiânia, Central Brazil, from November 1999 to October 2000. Linked birth and infant death certificates were used to ascertain the cohort of live born infants. An additional active surveillance system of neonatal-based mortality was implemented. Exposure variables were collected from birth and death certificates. The outcome was survivors (n=713 and deaths (n=162 in all intensive care units in the study period. Cox's proportional hazards model was applied and a Receiver Operating Characteristic curve was used to compare the performance of statistically significant variables in the multivariable model. Adjusted mortality rates by birth weight and 5-min Apgar score were calculated for each intensive care unit. RESULTS: Low birth weight and 5-min Apgar score remained independently associated to death. Birth weight equal to 2,500g had 0.71 accuracy (95% CI: 0.65-0.77 for predicting neonatal death (sensitivity =72.2%. A wide variation in the mortality rates was found among intensive care units (9.5-48.1% and two of them remained with significant high mortality rates even after adjusting for birth weight and 5-min Apgar score. CONCLUSIONS: This study corroborates birth weight as a sensitive screening variable in surveillance programs for neonatal death and also to target intensive care units with high mortality rates for implementing preventive actions and interventions during the delivery period.OBJETIVO: Identificar fatores prognósticos de mortalidade neonatal em unidades de cuidados intensivos. MÉTODOS: Realizou-se estudo de coorte de nascidos vivos do município de Goiânia, no período de novembro de 1999 a outubro de 2000. Procedeu-se à vinculação das bases de dados das declarações de nascidos vivos e de óbitos, das quais as variáveis de exposição foram extra

  20. SOVT analysis of the nuclear industry in Mexico; Analisis FODA de la industria nuclear en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez R, E.; Hernandez B, M. C., E-mail: edelmiraf@yahoo.com [Instituto Tecnologico de Toluca, Division de Estudios de Posgrado, Av. Instituto Tecnologico s/n, Ex-rancho La Virgen, 52140 Metepec, Estado de Mexico (Mexico)

    2011-11-15

    In this work the analysis of strengths, opportunities, vulnerabilities and threats (SOVT) of the nuclear industry in Mexico is presented. This industry presents among its strengths that Mexico is a highly electrified country and has a good established normative mark of nuclear security. Although the Secretaria de Energia in Mexico, with base to the exposed in the Programa Sectorial de Energia 2007-2012, is analyzing the convenience of the generation starting from this source, considering the strong technological dependence of the exterior and the limited federal budget dedicated to this field. As a result of the analysis of the SOVT matrix, were found a great number of strengths that threats, although the vulnerabilities list is major to the strengths, the opportunities list is the bigger. Therefore, the nuclear industry can be a sustainable industry, taking the necessary decisions and taking advantage of the detected opportunities. (Author)

  1. Sede central de una compañía de seguros Oberursel/Ts. - Alemania Federal

    Directory of Open Access Journals (Sweden)

    Hentrich, Helmut

    1977-02-01

    Full Text Available This building is designed to house the control Centre of an Insurance Company, formed by three chartered companies, in the town of Oberursel, near Frankfurt. The work includes seven floors and two basements, in the shape of a swastika, and is completed with a rectangular annex, with two storeys, intended for the restaurant, cafeteria and an all-purpose room. The main building provides offices of a landscape type, with a total of 1,500 jobs, to be extended to 2,500. The structure is in reinforced concrete, with a modulation between support axes of 10.50 X 10.50 m. The stability of the unit is achieved through a main bracing nucleus, which also acts as a vertical communication axis. The frontage is of curtain wall, with steel framework corridor on all the floors, aluminium carpentry and insulating glazing. These corridors lead to two fire scapes, backing on to the main building on opposite sides. Suitable decoration, together with the specially chosen furniture and the varied series of installations, both generic and specific, for this type of centers, contribute towards achieving the suitable working atmosphere. Furthermore, a group of social, recreative and sports installations, facilitate personal contacts among employees.Este edificio se destina a albergar el Centro de control de una compañía de seguros, integrada por tres sociedades anónimas, en la ciudad de Oberursel, cerca de Frankfurt. La obra se desarrolló en seis plantas y dos sótanos con forma de cruz gamada, y se completa con un anexo rectangular, de dos plantas, dedicado a restaurante, cafetería y sala polivalente. El edificio principal distribuye oficinas de tipo paisajístico con un total de 1.500 puestos de trabajo, ampliables hasta 2.500. La estructura es de hormigón armado, con una modulación entre ejes de soportes de 10,50 x 10,50 m. La estabilidad del conjunto se consigue mediante un núcleo central de arriostramiento, que sirve, además, de eje de

  2. Overhaul of the generator of the hydroelectric central station Ingeniero Carlos Ramirez Ulloa; Rehabilitacion del generador de la unidad 2 de la central hidroelectrica ingeniero Carlos Ramirez Ulloa

    Energy Technology Data Exchange (ETDEWEB)

    Robles Pimentel, Edgar [Instituto de Investigaciones Electricas, Cuernavaca (Mexico); Garcia Hernandez, Javier [Comision Federal de Electricidad, Mexico, D. F. (Mexico)

    1997-12-31

    In November 1995, the failure of the Unit 2 generator at the hydroelectric central station Ingeniero Carlos Ramirez Ulloa, El Caracol, occurred. The accident forced to carry out its overhaul. Here are presented the technical problems faced during the overhaul of the generator and analyzed the implemented solutions. [Espanol] En noviembre de 1995 ocurrio la falla del generador de la unidad 2 de la central hidroelectrica Ing. Carlos Ramirez Ulloa, El Caracol. El accidente obligo a llevar a cabo su rehabilitacion. Se presentan los problemas tecnicos enfrentados durante la rehabilitacion del generador y se discuten las soluciones implementadas.

  3. Monstera florescanoana (Araceae, a new species from central Veracruz, Mexico Monstera florescanoana (Araceae, una especie nueva de la región central de Veracruz, México

    Directory of Open Access Journals (Sweden)

    Thomas B. Croat

    2010-08-01

    Full Text Available Monstera florescanoana (Araceae, a new species in section Monstera, endemic to central Veracruz, Mexico, is described and illustrated. This species appears to be most closely related to Monstera siltepecana Matuda and Monstera dubia (Kunth Engl. et K. Krause.Se describe e ilustra Monstera florescanoana (Araceae, una nueva especie de la sección Monstera, endémica de la región central del estado de Veracruz, México. Esta especie parece estar más cercanamente relacionada a los taxones Monstera siltepecana Matuda y Monstera dubia (Kunth Engl. et K. Krause.

  4. Monstera florescanoana (Araceae), a new species from central Veracruz, Mexico Monstera florescanoana (Araceae), una especie nueva de la región central de Veracruz, México

    OpenAIRE

    Croat, Thomas B.; Thorsten Krömer; Amparo Acebey

    2010-01-01

    Monstera florescanoana (Araceae), a new species in section Monstera, endemic to central Veracruz, Mexico, is described and illustrated. This species appears to be most closely related to Monstera siltepecana Matuda and Monstera dubia (Kunth) Engl. et K. Krause.Se describe e ilustra Monstera florescanoana (Araceae), una nueva especie de la sección Monstera, endémica de la región central del estado de Veracruz, México. Esta especie parece estar más cercanamente relacionada a los taxones Monster...

  5. El valor de la opinión en los noticieros televisivos chilenos de hoy el caso de 24 horas central de TVN

    Directory of Open Access Journals (Sweden)

    Jimena Maiz Sáenz-Villarreal

    2014-12-01

    Full Text Available Con la cultura de masas y como efecto de la búsqueda de consenso propia de la democracia, la opinión, entendida como juicio de valor, se ha incorporado en los noticieros televisivos como medio de legitimación para el líder que la emite y como forma de identificación para el receptor que se sienta representado por ella. Por ello, su intención es generar un acercamiento con el destinatario, tratando de impactar, al mismo tiempo, su inteligencia y sus emociones, para orientarlo en algún sentido a través de opiniones propiamente tales, expresión de sentimientos y apelaciones. El presente trabajo busca demostrar este planteamiento mediante el análisis semiótico del noticiario 24 horas Central de TVN, utilizando para ello el paradigma de Charles Morris.

  6. Comparación de Peso Entre Dos Protocolos de Crianza Artificial de venados cola blanca (Odocoileus virginianus en el Altiplano Central de México

    Directory of Open Access Journals (Sweden)

    Karen Montaño-Suárez

    2014-12-01

    Full Text Available En el altiplano central de México, el aprovechamiento sustentable del venado cola blanca (Odocoileus virginianus a través de la caza deportiva, ha permitido el desarrollo de nuevas empresas de prestación de servicios cinegéticos. Cuando se habla de los nuevos agronegocios se puede mencionar a los ranchos cinegéticos que son predios rústicos particulares, destinado a la producción ganadera o forestal y que se dedican a la reproducción y aprovechamiento económico de diferentes especies de la fauna silvestre. Una de las empresas más importante cinegéticas en el altiplano central de México es sin duda el Rancho Bernalejo “Hunting Resort & Spa”, una compañía 100% Mexicana. En este lugar los venados son manejados bajo un estricto programa de selección. Dentro de los planes de manejo del rancho Pueden existir situaciones por las que algunos cervatos reciban un manejo especial de alimentación, como daños en la ubre de la madre, hembras que enferman o mueren, o que el recién nacido sea rechazado por la madre, por ser muy pequeños, cuando la parición es de triates o cuádruples, o en casos de crianza artificial. Durante la crianza artificial del Rancho Bernalejo, los cervatillos se alimentan con un sustituto de leche Zoologic Doe®; suministrando para su adecuada alimentación durante la crianza. La importancia de este trabajo es proponer un protocolo de alimentación donde se logre un incremento en la ganancia de peso de los cervatos y por otro lado disminuir los niveles de mansedumbre de las crías.

  7. Protocol in NORM industries. Central thermal coal production; Protocolo de actuacion en industrial NORM. Centrales de produccion termica de carbon

    Energy Technology Data Exchange (ETDEWEB)

    Robles, B.; Mora, J. C.; Corbacho, J. A.; Baeza, A.; Cancio, D.

    2011-07-01

    This protocol arises from the execution of R and D project Study of the radiological impact of coal power plants on their environment, funded by the Nuclear Safety Council. Its main objective was to assess the radiological impact exerted on workers and their environments, the four coal-fired power more currently in Spain: As Pontes (A Coruna), Compostilla II (Leon ),Litoral (Almeria) and Andorra (Teruel). (Author)

  8. Caracterización de un grupo de pacientes con esquizofrenia en el Valle Central de Costa Rica

    Directory of Open Access Journals (Sweden)

    Javier Contreras

    2008-09-01

    Full Text Available Justificación y objetivo: la esquizofrenia es una enfermedad crónica con importantes repercusiones sociales que afecta al 1% de la población mundial. Se describe las características de la esquizofrenia en una muestra de pacientes del Valle Central de Costa Rica. Métodos: estudio descriptivo, transversal en esquizofrénicos diagnosticados a través del proceso de mejor estimado diagnostico según la cuarta edición del Manual Diagnóstico y Estadístico de los Trastornos Mentales (DSMIV. Resultados: de 260 esquizofrénicos, 186 (71.5% son varones y 74 (28.5% mujeres, la edad promedio de entrevista es 38.95 años (Desviación Standard (DS: 11.37, menor en los varones (37.54 años, DS: 10.46 que en las mujeres (42.49 (DS: 12.81, p0.05. El número de hospitalizaciones es en promedio 5.49 (DS: 5.24, (p>0.05, los sujetos solteros presentan tendencia a un mayor número de ingresos (17.25 internamientos. El 49.6% ha sufrido al menos un síndrome depresivo mayor, 7.5% de los varones presenta abuso y el 22.0% dependencia al alcohol; 7.7% de sujetos presenta abuso y el 7.3% dependencia a sustancias (p>0.05. Discusión: Nuestros pacientes presentaron características clínicas y demográficas similares a lo observado en otras poblaciones. Más de la mitad de los individuos tenían antecedente de síntomas afectivos siendo los depresivos los más frecuentes. Los varones solteros constituyeron el grupo con peor pronóstico, mayor desempleo y mayor tendencia a presentar reingresos hospitalarios. Sin embargo, dicho hallazgo podría ser explicado por la organización económica de los hogares y el rol social del varón en nuestra sociedad. Conclusión: los varones y las mujeres EZ del VCCR muestran una misma edad de inicio de enfermedad, el subtipo predominante en ambos grupos es el indiferenciado con el antecedente de síntomas depresivos. Los varones presentan un mayor índice de desempleo, mayor consumo de sustancias lícitas e ilícitas y mayor n

  9. ¿La intervención del Banco Central afecta el momentum de la tasa de cambio?: evidencia empírica para Colombia / does Central Bank intervention affect the momentum of the exchange rate? empirical evidence for Colombia

    OpenAIRE

    Reyes Roa, María Fernanda

    2011-01-01

    Este documento estudia la incidencia de la intervención cambiaria del banco central en la inercia de corto plazo de la tasa de cambio de Colombia usando un enfoque probabilístico. Para esto, se estima un modelo de respuesta binaria que usa información diaria de la tasa de cambio peso/dólar que se controla por variables relevantes para explicar el comportamiento de la tasa de cambio en el corto plazo y por los montos diarios de intervención del banco central en el mercado cambiario. Se encuent...

  10. Central de ventiladores mecânicos: organização, segurança e qualidade Central of mechanical fan: organization, safety and quality

    OpenAIRE

    Miranildes de Abreu Batista; Erikson Custódio Alcântara; Lilian Khellen Gomes de Paula

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: A central de ventiladores mecânicos é a unidade do hospital com finalidade de organizar recursos de ventilação, promovendo controle e manutenção preventiva e organizacional destes equipamentos. O objetivo deste estudo foi elaborar uma proposta de implantação de uma central de ventiladores mecânicos em hospital universitário, subsidiado pela identificação do conhecimento técnico científico dos enfermeiros sobre o tema ventilação mecânica e pela detecção de problemas ...

  11. Reflectance measurement in heliostats field of Solar Thermal Central Receivers Systems; Medida de reflectancia en campos de heliostatos de sistemas de Torre Central

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez-Reche, J.; Monterreal, R.

    2004-07-01

    Determination of the mean reflectance of Heliostats field of Solar Thermal Central Receivers Systems takes high relevance, from both the operational point of view and the components evaluation. To calculate the mean reflectance calculation becomes essential to establish a procedure that allows offering its value without measuring all and each one of the facets that constitute the field, since this is a long-time consuming and little operational task. This work presents the results of the statistical reflectance study of the CRS heliostats field of the Plataforma Solar de Almeria. In addition, to validate the results, the obtained average reflectance is introduced in the heliostats field simulation code Fiat{sub L}ux. A comparison between the simulation and real incident solar power measurement was performed. (Author)

  12. A cylindrical SPECT camera with de-centralized readout scheme

    Energy Technology Data Exchange (ETDEWEB)

    Habte, F. E-mail: habte@physto.se; Stenstroem, P.; Rillbert, A.; Bousselham, A.; Bohm, C.; Larsson, S.A

    2001-09-21

    An optimized brain single photon emission computed tomograph (SPECT) camera is being designed at Stockholm University and Karolinska Hospital. The design goal is to achieve high sensitivity, high-count rate and high spatial resolution. The sensitivity is achieved by using a cylindrical crystal, which gives a closed geometry with large solid angles. A de-centralized readout scheme where only a local environment around the light excitation is readout supports high-count rates. The high resolution is achieved by using an optimized crystal configuration. A 12 mm crystal plus 12 mm light guide combination gave an intrinsic spatial resolution better than 3.5 mm (140 keV) in a prototype system. Simulations show that a modified configuration can improve this value. A cylindrical configuration with a rotating collimator significantly simplifies the mechanical design of the gantry. The data acquisition and control system uses early digitization and subsequent digital signal processing to extract timing and amplitude information, and monitors the position of the collimator. The readout system consists of 12 or more modules each based on programmable logic and a digital signal processor. The modules send data to a PC file server-reconstruction engine via a Firewire (IEEE-1394) network.

  13. A cylindrical SPECT camera with de-centralized readout scheme

    Science.gov (United States)

    Habte, F.; Stenström, P.; Rillbert, A.; Bousselham, A.; Bohm, C.; Larsson, S. A.

    2001-09-01

    An optimized brain single photon emission computed tomograph (SPECT) camera is being designed at Stockholm University and Karolinska Hospital. The design goal is to achieve high sensitivity, high-count rate and high spatial resolution. The sensitivity is achieved by using a cylindrical crystal, which gives a closed geometry with large solid angles. A de-centralized readout scheme where only a local environment around the light excitation is readout supports high-count rates. The high resolution is achieved by using an optimized crystal configuration. A 12 mm crystal plus 12 mm light guide combination gave an intrinsic spatial resolution better than 3.5 mm (140 keV) in a prototype system. Simulations show that a modified configuration can improve this value. A cylindrical configuration with a rotating collimator significantly simplifies the mechanical design of the gantry. The data acquisition and control system uses early digitization and subsequent digital signal processing to extract timing and amplitude information, and monitors the position of the collimator. The readout system consists of 12 or more modules each based on programmable logic and a digital signal processor. The modules send data to a PC file server-reconstruction engine via a Firewire (IEEE-1394) network.

  14. Energy and centrality dependences of charged multiplicity pseudorapidity density in relativistic nuclear collisions

    CERN Document Server

    Zhou Dai Mei; Sá Ben-Hao; Li Zhong Dao

    2002-01-01

    Using a hadron and string cascade model, JPCIAE, and the corresponding Monte Carlo events generator, the energy and centrality dependences of charged particle pseudorapidity density in relativistic nuclear collisions were studied. Within the framework of this model, both the relativistic p anti p experimental data and the PHOBOS and PHENIX Au + Au data could be reproduced fairly well without retuning the model parameters. The author shows that since is not a well defined physical variable both experimentally and theoretically, the charged particle pseudorapidity density per participant pair can increase and also can decrease with increasing of , so it may be hard to use charged particle pseudorapidity density per participant pair as a function of to distinguish various theoretical models for particle production

  15. Estudio y análisis de instalaciones de centrales termosolares con tecnología CCP

    OpenAIRE

    MAS SANZ, JAVIER

    2011-01-01

    Trabajo científico técnico. El presente proyecto, trata de realizar el análisis y estudio de las plantas de generación de energía limpia y renovable, basadas en tecnología desarrollada a partir de captadores cilindro parabólicos Mas Sanz, J. (2011). Estudio y análisis de instalaciones de centrales termosolares con tecnología CCP. http://hdl.handle.net/10251/12088. Archivo delegado

  16. Escenario de Sismo y Tsunami en el Borde Occidental del la Region Central del Peru.

    OpenAIRE

    Tavera, Hernando

    2014-01-01

    En el presente informe se analiza la información publicada sobre la ocurrencia de grandes sismos en el Perú, con el propósito de consolidar el posible escenario sísmico y de tsunami que pueda presentarse en el borde occidental de la región central del Perú y que afectaría a la ciudad de Lima Metropolitana y a la provincia Constitucional del Callao. Se considera como fuentes primarias los trabajos de investigación realizados por Tavera y Bernal (2005) “Distribución espacial de á...

  17. Validación de genotipos de frijol negro en la zona central del Estado de Veracruz, México

    Directory of Open Access Journals (Sweden)

    Francisco Javier Ugalde Acosta

    2005-01-01

    Full Text Available Validación de genotipos de frijol negro en la zona central del estado de Veracruz, México. El objetivo del presentetrabajo, fue validar genotipos de frijol con el paquete tecnológico del INIFAP, en parcelas de productores. Durante los ciclosde humedad residual de 1998 a 2001 se establecieron nueveparcelas de validación. Los genotipos utilizados fueron: las lí-neas II-307 y DOR-500 y las variedades Negro Huasteco 81,Negro Cotaxtla 91 y Negro INIFAPy como testigo del productor la variedad Jamapa. En las parcelas se realizaron las laboresde manejo agronómico recomendadas por el INIFAPpara esazona de producción. Cada parcela ocupó una superficie total de3000 m2. Se realizaron análisis de varianza individuales por localidad, considerando como repetición los rendimientos obtenidos por cada genotipo (500 m2 por ciclo de evaluación; también se efectuaron análisis combinado con prueba deseparación de medias (DMS 5% y un análisis económico mediante la Tasa de Retorno Marginal. Los resultados indicaronque las variedades y líneas mejoradas fueron superiores en másdel 100% en rendimiento al testigo. El análisis económicomostró que el mayor beneficio económico se obtuvo al sembrarlas variedades Negro INIFAPy Negro Cotaxtla 91, con utilidades superiores a los US $ 286/ha y una relación beneficio/costo de 1,52 y 1,51, respectivamente.

  18. Central hormigonera y de clasificación de áridos

    Directory of Open Access Journals (Sweden)

    Hossdorf, Heinz

    1963-11-01

    Full Text Available In order to exploit industrially the aggregates to be found in substantial quantities near the river Aare, Switzerland, a station has been constructed in which the aggregates will be classified. Concrete will then be made at a nearby building, to be sold commercially. It is estimated that there are about 2 million cubic metres of suitable aggregate material available for exploitation. The design of these installations has been prepared in collaboration with the firm which supplied the equipment so that the resulting project fully meets with the functional demands. The building is divided into four independent units, which are closely integrated in their operational use. The main item for the transport of aggregates is a tubular metal bridge, easy to assemble, and to adapt to the varying positions of the quarry face. The total length of this bridge is 120 ms. The main part of the building includes the housing of the installations and two groups of silos. On each side of the silos roadways have been provided to be utilized by the trucks that take the aggregates to their various destinations.Los áridos de una capa potente en las proximidades del río Aare, en Suiza, se ha construido un edificio, de características particulares, destinado a tratar y clasificar dichos áridos y, a la vez, vender el hormigón preparado en una central situada al lado de las instalaciones de clasificación. Los estudios geológicos del banco puesto en explotación, arrojan una reserva aproximada de dos millones de metros cúbicos de áridos sin clasificar. El proyecto de estas instalaciones se ha redactado en colaboración con !a factoría que ha suministrado la maquinaria que ha de tratar los áridos procedentes de la cantera, con lo que se ha conseguido una solución que cubre las exigencias originales a plena satisfacción, que consiste en una subdivisión del edificio en cuatro cuerpos independientes, aunque orgánicamente se hallen enlazados. Él elemento

  19. Sistema de Benchmarking de competencias nucleares en universidades

    OpenAIRE

    Mindreau Silva, Jorge Eduardo

    2001-01-01

    La época actual se caracteriza, fundamentalmente, por los cambios dinámicos que se producen en los entornos económicos, políticos, sociales y culturales de las organizaciones creando realidades cada vez más complejas. La organización universitaria, como cualquier institución social, difícilmente puede concebirse al margen de los cambios que se producen en la sociedad. La conexión de la universidad con la sociedad, desde siempre, ha tenido algo de problemático. Por una parte las universidades ...

  20. AZTLAN platform: Mexican platform for analysis and design of nuclear reactors; AZTLAN platform: plataforma mexicana para el analisis y diseno de reactores nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Gomez T, A. M.; Puente E, F. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Del Valle G, E. [IPN, Escuela Superior de Fisica y Matematicas, Av. IPN s/n, Edif. 9, Col. San Pedro Zacatenco, 07738 Mexico D. F. (Mexico); Francois L, J. L.; Martin del Campo M, C. [UNAM, Facultad de Ingenieria, Departamento de Sistemas Energeticos, Paseo Cuauhnahuac 8532, 62550 Jiutepec, Morelos (Mexico); Espinosa P, G., E-mail: armando.gomez@inin.gob.mx [Universidad Autonoma Metropolitana, Unidad Iztapalapa, Av. San Rafael Atlixco No. 186, Col. Vicentina, 09340 Mexico D. F. (Mexico)

    2014-10-15

    The Aztlan platform Project is a national initiative led by the Instituto Nacional de Investigaciones Nucleares (ININ) which brings together the main public houses of higher studies in Mexico, such as: Instituto Politecnico Nacional, Universidad Nacional Autonoma de Mexico and Universidad Autonoma Metropolitana in an effort to take a significant step toward the calculation autonomy and analysis that seeks to place Mexico in the medium term in a competitive international level on software issues for analysis of nuclear reactors. This project aims to modernize, improve and integrate the neutron, thermal-hydraulic and thermo-mechanical codes, developed in Mexican institutions, within an integrated platform, developed and maintained by Mexican experts to benefit from the same institutions. This project is financed by the mixed fund SENER-CONACYT of Energy Sustain ability, and aims to strengthen substantially to research institutions, such as educational institutions contributing to the formation of highly qualified human resources in the area of analysis and design of nuclear reactors. As innovative part the project includes the creation of a user group, made up of members of the project institutions as well as the Comision Nacional de Seguridad Nuclear y Salvaguardias, Central Nucleoelectrica de Laguna Verde (CNLV), Secretaria de Energia (Mexico) and Karlsruhe Institute of Technology (Germany) among others. This user group will be responsible for using the software and provide feedback to the development equipment in order that progress meets the needs of the regulator and industry; in this case the CNLV. Finally, in order to bridge the gap between similar developments globally, they will make use of the latest super computing technology to speed up calculation times. This work intends to present to national nuclear community the project, so a description of the proposed methodology is given, as well as the goals and objectives to be pursued for the development of the

  1. Nuclear study of Melusine; Etude nucleaire de Melusine

    Energy Technology Data Exchange (ETDEWEB)

    Cherot, J. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1959-07-01

    In this report are reviewed - with respect to starting of experiments - the main nuclear characteristics of a 20 per cent enriched uranium lattice, with light water as moderator and reflector. The reactor is to operate at 1 MW. 1) Study of various critical masses. 2) Control. Effectiveness of cadmium. Control rods and of a stainless steel regulating rod. 3) Study of the effect on reactivity of disturbances in the core center. 4) Study of xenon and samarium poisoning. 5) Temperature factor. 6) Heat exchanges in a fuel element. (author) [French] On etudie, dans ce rapport, les principales proprietes nucleaires d'un reseau a uranium enrichi (20 pour cent), dont le moderateur et le reflecteur sont l'eau legere en vue des experiences de demarrage. Ce reacteur devra fonctionner a 1 MW. 1) Etude de diverses masses critiques. 2) Controle. Efficacite des barres de controle en cadmium et d'une barre de reglage en acier inoxydable. 3) Etude de l'effet sur la reactivite de perturbation au centre du coeur. 4) Etude de l'empoisonnement xenon et samarium. 5) Coefficient de temperature. 6) Echanges thermiques dans un element. (auteur)

  2. Calculo Preliminar de la Tasa de Meteorización del Batolito Antioqueño, Cordillera Central, Colombia

    Directory of Open Access Journals (Sweden)

    Carolina Garcia

    2010-04-01

    Full Text Available Este trabajo es una estimación preliminar del tiempo necesario para generar la espesa capa de saprolito que caracteriza el perfil de meteorización actual de un batolito cuarzodiorítico cretácico que aflora en altiplanos de la Cordillera Central de Colombia, entre 5º50' y 7º00' de latitud Norte y 74º50' y 75º35' de longitud Oeste y a alturas entre 750 y 2700 m.Se utilizan datos obtenidos previamente mediante el análisis de la composición química de las aguas superficiales de cuatro cuencas con áreas diferentes, ubicadas sobre el Batolito Antioqueño, al este de Medellín. Los cáculos se hicieron con el método basado en la pérdida de componentes en solución utilizando diferentes valores de solutos. Al utilizar la pérdida de sílice se obtiene un tiempo de meteorización de unos 6 x 10 6 años, comparable con el obtenido mediante la datación de las cenizas volcánicas mas antiguas que recubren la topografía actual y que indican la fecha mínima de configuración de la superficie de erosión.A pesar de resultar de una serie de suposiciones simplificadoras, este resultado es interesante y justifica la realización de determinaciones mas detalladas. Confirma la larga preservación de superficies de erosión antiguas conformadas sobre un saprolito que desde hace varios millones de años no ha sido sometido a una erosión profunda, fenómeno poco común en una zona tectónicamente activa como la estudiada.

  3. Diseño de una central fotovoltaica de 100 kWp de potencia nominal

    OpenAIRE

    Sanz Moya, Roberto

    2010-01-01

    El proyecto ha tratado el cálculo y diseño de una Instalación Solar fotovoltaica de 100 kW de potencia nominal situada en el término municipal de Badajoz. Se han seleccionado los componentes considerados óptimos, de los diferentes fabricantes del mercado que aportan al proyecto la mejor solución técnica y económica. En el proceso se ha tenido en cuenta el pliego de condiciones actualmente en vigor contemplando los siguientes puntos: - Diseño del generador fotovoltaico: se han emplead...

  4. Remote system for counting of nuclear pulses; Sistema remoto de conteo de pulsos nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Nieves V, J.A.; Garcia H, J.M.; Aguilar B, M.A. [Instituto Nacional de Investigaciones Nucleares, Ingenieria Electronica, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1999-07-01

    In this work, it is describe technically the remote system for counting of nuclear pulses, an integral system of the project radiological monitoring in a petroleum distillation tower. The system acquires the counting of incident nuclear particles in a nuclear detector which process this information and send it in serial form, using the RS-485 toward a remote receiver, which can be a Personal computer or any other device capable to interpret the communication protocol. (Author)

  5. Presentation of the process External communications on the nuclear facilities operation of the Adjunct Head Office of Nuclear Safety of Comision Nacional de Seguridad Nuclear y Salvaguardias; Presentacion del proceso Comunicaciones externas sobre el funcionamiento de instalaciones nucleares de la Direccion General Adjunta de Seguridad Nuclear de la Comision Nacional de Seguridad Nuclear y Salvaguardias

    Energy Technology Data Exchange (ETDEWEB)

    Espinosa V, J. M., E-mail: jmespinosa@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Barragan No. 779, Col. Narvarte, 03020 Mexico D. F. (Mexico)

    2012-10-15

    The Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) in use of their attributions granted by the Regulation Law of the constitutional Art. 27 in nuclear matter began the development of the called process External communications on the nuclear facilities operation, with the purpose of negotiating the evaluation of the concerns related with the safety of the nuclear facilities received these of external people to the CNSNS. The process External communications on the nuclear facilities operation will allow to the public's members and the workers that carry out activities inside the mark regulator imposed by the CNSNS that report to this Commission their concerns related with safety for several means (for example, directly to the personnel of the assigned Office, official and public statements, phone communication, electronic mail, etc.) The present article presents the legal mark confers the CNSNS the attributions to develop the mentioned process and exposes the most important elements that compose it. The term External communication on the nuclear facilities operation is defined and also is described how these communications are received, evaluated and closed by the assigned Office. Of equal way the objectives that intents to reach this process are indicated. The intention of the mentioned process is to strengthen the actions that the CNSNS carries out in the execution of its functions to maintain the safety standards in the operation of the nuclear facilities in Mexico. (Author)

  6. Influence of riverine outputs on sandy beaches of Higuerote, central coast of Venezuela Influencia de aportes fluviales en playas arenosas de Higuerote, costa central de Venezuela

    Directory of Open Access Journals (Sweden)

    Antonio Herrera

    2011-01-01

    Full Text Available The influence of riverine outputs from the Tuy River on the coastal processes of near sandy beaches was assessed by measuring the physical and chemical characteristics of water and sediment samples at eight sites along the north central Venezuelan coast and from the rivers that flow through this región into the sea (Tuy, Capaya, Curiepe during two field surveys. In addition, the behavior of the Tuy River discharge plume was evaluated using remote sensors, and its effect on the population abundance and size structure of the clam Tivela mactroides was determined. Of the three rivers evaluated, the Tuy River had the highest impact on the coastal zone (789.15 ± 190.63 km² in terms of flow rate (246.39 m³ s-1, nutrients (659.61 ± 503.27 g s-1total nitrogen; 52 ± 53.09 g s-1 total phosphorus and sedimentary material (9320.84 ± 9728.15 g s-1. The variables measured (salinity, total nitrogen and phosphorus, pH, turbidity, and total organic carbon showed a spatial gradient along the coast. Tivela mactroides had the highest biomass and density (9126.8 ± 1562 g m-2; 9222.22 ± 1976.72 ind m-2 at the sites farthest from the river mouths and smaller sizes (Para evaluar los aportes del río Tuy sobre los procesos costeros en playas arenosas cercanas, se examinó en dos campañas de muestreo, las características físicas y químicas a nivel de agua y sedimento en ocho estaciones ubicadas a lo largo de la costa centro norte de Venezuela, el cauce de los ríos que allí desembocan (Tuy, Capaya, Curiepe, además del comportamiento de la pluma del río Tuy mediante sensores remotos y su influencia sobre las poblaciones de la almeja Tivela mactroides en cuanto a abundancia y estructura de talla. El río Tuy tuvo mayor predominio sobre la zona costera (789,15 ± 190,63 km , presentó el mayor aporte líquido (246,39 m³ s-1, de nutrientes (659,61 ± 503,27 g s-1 nitrógeno total; 52 ± 53,09 g s-1fósforo total y material sedimentario (9320,84 ± 9728,15 g

  7. Foreseeing techniques and control of emissions in thermal power plants. Workshop Latin American. [Selected Papers]; Control y tecnicas de prevision de las emisiones de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Saldana, R.; Morales, F.; Urrutia, M. [eds.] [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1996-12-31

    This document contains the conference proceedings of the Latin-American Workshop ``Control and Prevision Techniques of Emissions in Power Plants`` carried out in Cuernavaca, Mexico on June 1996, with the participation of representatives of Argentina, Chile, Guatemala, Colombia, Ecuador, Mexico, Nicaragua, Panama and Venezuela, as well as specialists from the European Union. The core issue analyzed in this workshop was the control and the evaluation techniques of polluting emissions in Power Plants [Espanol] Este documento contiene las memorias de conferencia del Taller Latinoamericano ``Control y tecnicas de prevision de las emisiones de centrales termoelectricas`` que se llevo a cabo en Cuernavaca, Mexico en junio de 1996. Participaron representantes de Argentina, Chile, Guatemala, Colombia, Ecuador, Mexico, Nicaragua, Panama y Venezuela, asi como especialistas de la Union Europea. El tema central tratado en este taller fue el control y tecnicas de evaluacion de las emisiones contaminantes en centrales termoelectricas

  8. Nuevo puente para el oleoducto de Europa Central

    Directory of Open Access Journals (Sweden)

    Giuliani, G.

    1971-04-01

    Full Text Available This bridge runs over the Po river, near Pavia, and is 1,370 m long. It is divided into spans of 36 m length each. The horizontal structure of the bridge consists of sets of four continuous girders, running over six spans, and two continuous girders, extending over seven spans. The piles are 14 m high and 1.50 m in diameter, and rest on the extension of the foundation piles. This article describes details of the project and the system of placing the continuous girders.Este puente, construido sobre el río Po, cerca de Pavía, tiene una longitud total de 1.370 m, dividida en tramos de 36 m de longitud, salvados por cuatro vigas continuas, de 6 vanos, y dos vigas continuas, de 7 vanos. Las pilas, de 14 m de altura y 1,50 m de diámetro, se han construido sobre la prolongación de los pilotes de cimientos. El artículo explica las particularidades de la obra y el procedimiento de lanzamiento adoptado.

  9. Conhecimento de enfermeiros de Neonatologia acerca do Cateter Venoso Central de Inserção Periférica

    Directory of Open Access Journals (Sweden)

    Marcela Patricia Macêdo Belo

    2012-02-01

    Full Text Available O Cateter Central de Inserção Periférica (PICC vem sendo utilizado como acesso venoso seguro para neonatos de risco. Objetivou-se descrever o conhecimento e prática dos enfermeiros das cinco unidades públicas de Terapia Intensiva Neonatal, de Recife-PE, sobre a utilização do PICC. A amostra foi composta por 52 enfermeiros; os dados foram coletados de janeiro a fevereiro de 2010. Nos resultados verificou-se que 64,8% dos enfermeiros não possuíam habilitação para inserção do PICC. Apenas duas unidades utilizavam o PICC rotineiramente. Sobre a indicação desse acesso, houve nível de acerto acima de 70%. Na unidade B apenas 8,3% dos enfermeiros referiram localização inicial adequada da ponta do cateter. Conclui-se que é necessário maior incentivo à capacitação dos enfermeiros para utilização do PICC.

  10. Materials Laboratory at the Institute of Nuclear Fusion: growth and characterization of coatings with nuclear applications; Laboratorio de Materiales en el Instituto de Fusion Nuclear: crecimiento y caracterizacion de recubrimientos con aplicaciones nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez-Arrabal, R.; Gordillo, N.; Panizo-Laiz, M.; Fernandez-Martinez, I.; Wennberg, A.; Rivera, A.; Pena, O.; Briones, F.; Perlado, J. M.

    2013-07-01

    We report on the capabilities of the new materials lab located at the Instituto de Fusion Nuclear to develop coating for nuclear applications. The main objectives of the lab are described: (a) design of coatings which fulfil industrial requirements and (b) development of the need instrumentation to coat non-planar surfaces, i.e. inner and outer surface of pipes. Some examples of radiation resistance materials (self-healing) will be shown. Moreover, we present some new solution with improved corrosion resistance when facing liquid metals to conform the cooling system of future fission and fusion nuclear reactors. (Author)

  11. The nuclear bulge. I. K band observations of the central 30 PC

    Science.gov (United States)

    Philipp, S.; Zylka, R.; Mezger, P. G.; Duschl, W. J.; Herbst, T.; Tuffs, R. J.

    1999-08-01

    Out of ~ 500 individual source images we have constructed a mosaic map of the K band surface brightness in an area Delta alphax Delta delta ~ 650''x710'' (R_equiv ~ 15.8 pc for R_0 = 8.5 kpc) centered approximately on Sgr A*. An observing technique was used which allows us to recover an extended background emission. To separate sources from an unresolved background continuum we fitted Lorentzian distributions to the sources and find that about one half of an integrated, not dereddened K band flux density of 752 Jy is contributed by ~ 6*E(4) stars with flux densities S_K(') >~ 100 mu Jy and the remainder is contributed by an extended continuum provided by about 6*E(8) stars too weak to be observed as individual sources. We estimate that >~ 80% of the integrated flux density of the mosaic is contributed by stars in the Nuclear Bulge (NB; R 3 kpc). We determine the K band luminosity functions (KLF) of the mosaic and of subareas dominated by Nuclear Bulge, Galactic Bulge and Disk stars, respectively, and construct difference KLFs which relate to the specific stellar populations of these regions. The detection limit is S_K(') ~ 100 mu Jy, for the completeness limit we estimate S_K(') ~ 2 000 mu Jy. We find that the stellar population of the Nuclear Bulge contains considerably more bright stars (i.e. with reddened K band flux densities S_K(') >~ 5*E(3 mu ) Jy), most of which are probably early O stars, Giants and Supergiants. The stellar population of the Galactic Bulge on the other hand is dominated by stars which appear to be lower mass (Main Sequence (MS) stars. A model KLF constructed with a Salpeter Initial Mass Function (IMF) for stars of spectral type O9 or later (S_K(') masses ranging from 0.06 to 6 M_sun account for the unresolved continuum. Combining observed and model KLF we obtain a mosaic KLF which increases ~ S_K({') - 1} for 10(6) >~ S_K('/mu ) Jy >~ 10(3) and ~ S_K({') - 0.6} for 10(3) >~ S_K('/mu ) Jy >~ 3*E(-3) . For radii R relatively young generation

  12. A Study to Promote a Collaboration of R and D for Nuclear Energy Technology Development between Korea and Central Asia

    International Nuclear Information System (INIS)

    The goal of this research work is to promote the cooperation in the field of nuclear related works with Kazakhstan and Uzbekistan which are main countries in the central Asia. To make a basis on exchanging researchers, a staff in KAERI had visited INP NNC RK, touring research reactors, and make a discussion with the staffs in INP. With this, there is a efforts to make an arrangement between KAERI and NNC RK, signing will be made in near futures. To understand the level of nuclear technology in Uzbekistan, Dr. Rho had made a trip to INP. He visited the Gamma-radiation facility, a research reactor. In Nov. 2005, the chairman of Science Academy visited Korea to discuss the future cooperation in the field of peaceful use of the nuclear energy. By doing so, Korea will make an effort to cooperate with countries in the Central Asia

  13. A Study to Promote a Collaboration of R and D for Nuclear Energy Technology Development between Korea and Central Asia

    Energy Technology Data Exchange (ETDEWEB)

    Rho, Si Pyo; Kim, Cheol Jung; Yoo, Bung Duk; Kim, Jae Woo; Lee, Myung Ho; Kim, Kyung Pyo

    2006-02-15

    The goal of this research work is to promote the cooperation in the field of nuclear related works with Kazakhstan and Uzbekistan which are main countries in the central Asia. To make a basis on exchanging researchers, a staff in KAERI had visited INP NNC RK, touring research reactors, and make a discussion with the staffs in INP. With this, there is a efforts to make an arrangement between KAERI and NNC RK, signing will be made in near futures. To understand the level of nuclear technology in Uzbekistan, Dr. Rho had made a trip to INP. He visited the Gamma-radiation facility, a research reactor. In Nov. 2005, the chairman of Science Academy visited Korea to discuss the future cooperation in the field of peaceful use of the nuclear energy. By doing so, Korea will make an effort to cooperate with countries in the Central Asia.

  14. Neurocitoma central com apresentação incomum por hemorragia intraventricular: relato de caso

    Directory of Open Access Journals (Sweden)

    Hanel Ricardo Alexandre

    2001-01-01

    Full Text Available O neurocitoma central foi descrito pela primeira vez na literatura em 1982 por Hassoun e colaboradores como tumor bem diferenciado de origem neuronal. O tumor geralmente localiza-se no sistema ventricular, afetando adultos jovens e geralmente cursando com hipertensão intracraniana secundária à hidrocefalia obstrutiva. O diagnóstico diferencial com outros processos intraventriculares como oligodendroglioma é realizado através de métodos imuno-histoquímicos. Raros casos de neurocitoma central associados com hemorragia têm sido descritos na literatura. Descrevemos um caso de neurocitoma central de uma paciente de 35 anos com apresentação atípica. A paciente havia procurado o hospital com quadro súbito de cefaléia, vômitos e rigidez de nuca, sugerindo a presença de hemorragia subaracnóidea. A ressonância magnética demonstrou volumosa massa no ventrículo lateral direito cujos perfis histológico e imuno-histoquímico eram condizentes com neurocitoma central, a ressecção cirúrgica foi realizada com sucesso, embora a paciente tenha evoluído para um quadro de ventriculite no pós-operatório. Salientamos a importância do estabelecimento do neurocitoma central como diagnóstico diferencial de pacientes com hemorragia intraventricular e discutimos as opções de tratamento para este tumor incomum.

  15. Advecciones de polvo africano sobre la costa central venezolana y sus efectos sobre el desarrollo de la nubosidad

    Directory of Open Access Journals (Sweden)

    Estatio José Gutiérrez Quevedo

    2006-01-01

    Full Text Available Empleando el índice de aerosol, determinado a través de las mediciones del sensor TOMS, se ha realizado un análisis del comportamiento de las magnitudes del parámetro sobre la costa central venezolana en base al período 19972005; los resultados señalaron que se presentaron los máximos valores del índice en los meses de Julio y Agosto correspondientes a la temporada de lluvias. Para este período las masas de aire cargadas de partículas de polvo llegan al Caribe provenientes del desierto del Sahara, como lo demuestra el mapa con la distribución espacial de la mediana del índice para el mes de julio, por el contrarío existe una disminución sustancial en la cantidad de partículas dispersas sobre la troposfera venezolana en la temporada seca en donde las nubes de polvo se desplazan generalmente desde el Sahel. Los productos atmosféricos del sensor MODIS han sido utilizados para determinar la relación entre la concentración de aerosoles y el comportamiento de la nubosidad, presentando ésta una disminución en su desarrollo en presencia de valores altos del índice de aerosol principalmente en los meses de abril y mayo.

  16. Redução da prevalência de apneia central em pacientes com insuficiência cardíaca sob uso de betabloqueador Reducción de la prevalencia de apnea central en pacientes con insuficiencia cardiaca bajo uso de betabloqueante Reduction of central sleep apnea in heart failure patients with beta-blockers therapy

    Directory of Open Access Journals (Sweden)

    Christiano Pereira Silva

    2010-02-01

    Full Text Available FUNDAMENTO: As apneias do sono são doenças frequentes em portadores de insuficiência cardíaca (IC. Estimativas da era pré-betabloqueador (BB apontam para uma prevalência de 45% de apneias centrais nestes pacientes. OBJETIVO: Avaliar a influência dos BB na prevalência das apneias centrais e sua interferência na qualidade do sono e de vida de portadores de IC. MÉTODOS: 65 pacientes portadores de IC foram submetidos a polissonografia diagnóstica.Os resultados da polissonografia foram avaliados de acordo com o uso ou não de BB. No dia do exame os pacientes responderam ao questionário de Minessota para qualidade de vida com IC. Após 6 e 12 meses da data da polissonografia, houve contato telefônico com todos os pacientes, para a repetição do questionário de Minessota. RESULTADOS: A prevalência de apneia do sono (IAH > 15/h foi de 46,1% na população total, porém a apneia central foi identificada em apenas 18,4% dos pacientes. O uso de BB, em análise multivariada, foi o único preditor de ocorrência de menor índice de apneia e hipopneia (IAH central (p=0,002, maior saturação (p=0,02 e menor dessaturação média de oxigênio (p=0,03. Além disso, o uso de BB foi preditor de melhor qualidade de vida após 6 e 12 meses (p=0,002 e 0,001 respectivamente e de menor número de hospitalizações nestes períodos (p=0,001 e p=0,05 respectivamente. CONCLUSÃO: O uso de BB reduziu a incidência de apneia central na população total, se compararmos com os dados da literatura. Além disto, os BB melhoraram parâmetros da qualidade do sono e de vida de portadores de IC.FUNDAMENTO: Las apneas del sueño son enfermedades frecuentes en portadores de insuficiencia cardiaca (IC. Una estimación de la era pre betabloqueante (BB señala hacia una prevalencia del 45% de apneas centrales en estos pacientes. OBJETIVO: Evaluar la influencia de los BB en la prevalencia de las apneas centrales y su interferencia en la calidad del sueño y de vida de

  17. Establishment of the nuclear regulatory framework for the process of decommissioning of nuclear installations in Mexico; Establecimiento del marco regulador nuclear para el proceso de cierre de instalaciones nucleares en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Salmeron V, J. A.; Camargo C, R.; Nunez C, A., E-mail: juan.salmeron@cnsns.gob.mx [Comision Nacional de Seguridad Nuclear y Salvaguardias, Dr. Barragan 779, Col. Narvarte, 03020 Ciudad de Mexico (Mexico)

    2015-09-15

    Today has not managed any process of decommissioning of nuclear installations in the country; however because of the importance of the subject and the actions to be taken to long term, the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) in Mexico, accordance with its objectives is developing a National Nuclear Regulatory Framework and defined requirements to ensure the implementation of appropriate safety standards when such activities are performed. In this regard, the national nuclear regulatory framework for nuclear installations and the particular case of nuclear power reactors is presented, as well as a proposed licensing process for the nuclear power plant of Laguna Verde based on international regulations and origin country regulations of the existing reactors in nuclear facilities in accordance with the license conditions of operation to allow to define and incorporate such regulation. (Author)

  18. Public perception of nuclear power in Mexico after Fukushima; Percepcion publica de la energia nuclear en Mexico despues de Fukushima

    Energy Technology Data Exchange (ETDEWEB)

    Palacios, J. C.; Alonso, G.; Ramirez, R., E-mail: javier.palacios@inin.gob.mx [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2015-09-15

    This section presents some of the results of four studies on international public opinion about nuclear energy, the first one made several years before the Fukushima accident, conducted in 2005 by the IAEA through the company Globe Scan Inc. The second study was conducted by the same company in 2011 a few months after the Fukushima accident, including also corresponding results to two studies conducted by the British firm Ipsos Mori (of years 2011 and 2012 respectively). Finally three studies conducted by the Instituto Nacional de Investigaciones Nucleares (ININ) in 2006, 2008 and 2013 are presented. From the results of these studies was determined that the Fukushima accident itself had a negative effect on public opinion in Mexico, as throughout the world, but this trend is reversing. Also it found that public opinion in Mexico on using reactors to generate electricity is favorable, although not still has much support from the government for the construction of new nuclear power plants. (Author)

  19. Diversidad y aspectos biológicos de abejas silvestres de un ambiente urbano y otro natural de la región central de Santa Fe, Argentina

    Directory of Open Access Journals (Sweden)

    Milagros DALMAZZO

    2010-01-01

    Full Text Available El objetivo del presente trabajo fue relevar el elenco de abejas silvestres en la región central de Santa Fe y comparar la diversidad de especies y aspectos biológicos en dos ambientes de una misma región. Las abejas fueron colectadas en el estrato herbáceo de la Reserva Universitaria “Escuela Granja” de la localidad Esperanza, y en la zona urbana de la localidad Susana, ambas ubicadas dentro de la Provincia Fitogeográfica del Espinal. La colecta se realizó en octubre, noviembre y diciembre de 2004 y en enero, febrero y marzo de 2005, registrando las especies vegetales sobre las que se capturaron. Se colectaron 277 ejemplares en total, de los cuales se identificaron 62 especies (27 géneros en 5 familias. Las curvas de rarefacción indican una tasa de acumulación de especies mayor para la Reserva Ecológica, los índices de diversidad de Shannon son 3,25 para la Reserva Ecológica y 2,64 para la Zona Urbana. Para la comparación de las comunidades en ambos sitios, las abejas fueron clasificadas en tres categorías según la especialización en el uso del recurso floral, sustrato de nidificación y comportamiento social. Se observó una asociación entre los grupos especialistas y de nidificación en el suelo con el ambiente natural, y por otro lado, las especies generalistas y de nidificación en cavidades con el ambiente urbano. No se identificaron diferencias, en cuanto al tipo de comportamiento social de las especies, entre ambos sitios.

  20. Logistica de coleta e transporte de material biologico e organizacao do laboratorio central no ELSA-Brasil

    Directory of Open Access Journals (Sweden)

    Ligia G Fedeli

    2013-06-01

    Full Text Available O Estudo Longitudinal de Saúde do Adulto (ELSA-Brasil é um estudo de coorte multicêntrico com o objetivo de identificar os fatores de risco associados ao diabetes tipo 2 e à doença cardiovascular na população brasileira. O artigo descreve as estratégias de coleta, processamento, transporte e de controle de qualidade dos exames de sangue e urina no ELSA. O estudo optou pela centralização dos exames em um único laboratório. O processamento das amostras foi realizado nos laboratórios locais, reduzindo o peso do material a ser transportado e diminuindo os custos do transporte para o laboratório central no Hospital da Universidade de São Paulo. O estudo incluiu exames para avaliação de diabetes, resistência à insulina, dislipidemias, alterações eletrolíticas, hormônios tireoidianos, ácido úrico, alterações de enzimas hepáticas, inflamação e hemograma completo. Além desses exames, foram estocados DNA de leucócitos, amostras de urina, plasma e soro. O laboratório central realizou aproximadamente 375.000 exames.

  1. Síntesis de zeolitas a partir de cenizas volantes de centrales termoeléctricas de carbón

    OpenAIRE

    Umaña Peña, Juan Carlos

    2002-01-01

    Los sub-productos de combustión del carbón producidos en centrales térmicas, están compuestos generalmente por más de un 70% de material vítreo aluminosilicatado. Esta composición los hace potencialmente utilizables en obras de ingeniería civil o alternativamente como rellenos inertes en minería, así como adsorbentes, inmovilizadores, fuente alternativa en la extracción de Al, Fe, Si, Ge, Ga, V y Ni, y aditivos en suelos.Las cenizas volantes se caracterizan por una distribución granulométrica...

  2. Nuclear program of Iran. Towards de-escalation of a nuclear crisis. Advisory letter; Nucleair programma van Iran. Naar de-escalatie van een nucleaire crisis. Briefadvies

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-04-15

    The Dutch government, partly at the request of the House of Representatives (Second Chamber), the AIV asked to give an opinion about the position of Iran in the region and the role of the nuclear program of Iran in the geopolitical relations, in view of the most recent developments [Dutch] De Nederlandse regering heeft, mede op verzoek van de Tweede Kamer der Staten-Generaal, de AIV gevraagd advies uit te brengen over de positie van Iran in de regio en de rol van het nucleaire programma van Iran in de geopolitieke verhoudingen hierin, mede gelet op de meest recente ontwikkelingen.

  3. Qualidade sanitária de embutidos coletados no mercado público central de Porto Alegre-RS

    Directory of Open Access Journals (Sweden)

    Salvatori Rosângela Uhrig

    2003-01-01

    Full Text Available Noventa e três amostras de embutidos coletados no Mercado Público Central de Porto Alegre foram analisadas quanto à presença de Salmonella sp. e à contagem de coliformes fecais. Todos as amostras apresentaram ausência de Salmonella sp., enquanto, em relação aos coliformes fecais, constatou-se que quatorze amostras de embutidos frescais encontravam-se acima do padrão estabelecido pela portaria ndegrees 451, em vigor no momento da coleta. Entretanto, se fossem considerados os parâmetros estabelecidos na Resolução ndegrees 12, em vigor atualmente, apenas cinco amostras seriam consideradas fora de padrão. A maioria das amostras com contagens de coliformes fecais acima de 5x10²/g estava armazenadas acima da temperatura adequada no momento da coleta.

  4. Insects associated with chicken manure in a breeder poultry farm of Central Chile Insectos asociados a fecas de pollo en una avícola de Chile Central

    Directory of Open Access Journals (Sweden)

    J Retamales

    2011-01-01

    Full Text Available Insects are common in poultry facilities and different biosecurity measures are enforced to prevent their spread due to the fact that they may carry pathogenic agents. Therefore, it is of utmost importance to know what insects are commonly present in poultry sheds to optimize control protocols. Since information on this subject is scarce, this investigation aimed to determine the main insect taxa present in chicken manure on a major poultry farm in Central Chile. Samples of hen manure were collected at a poultry farm in the Region of Valparaíso, Chile, from areas adjacent to feeding lines and water reservoirs. Samples were chilled, transported to the laboratory and processed for taxonomic classification of both adult and immature stages of insects. Results indicated a marked colonization of the beetle Alphitobius diaperinus and of the dipterans Fannia sp., compared to other six families of insects that were also determined. About 94% of the insects found in chicken manure were present in samples from areas adjacent to water reservoirs. Therefore, leaks from water supply devices become a critical point of control of these entomological poultry pests that have been reported to carry a variety of viral, bacterial and eukaryotic parasites.Los insectos son muy comunes en las instalaciones de la industria avícola y diferentes medidas de bioseguridad se aplican para evitar su propagación debido al hecho que pueden acarrear agentes patógenos. Por lo tanto, es de suma importancia saber qué insectos comúnmente están presentes en los galpones avícolas para optimizar los protocolos de control. Ya que la información sobre este tema es escasa, el objetivo de la presente investigación fue determinar los principales grupos taxonómicos de insectos presentes en el guano de una granja avícola industrial en la zona central de Chile. Las muestras de guano fueron recolectadas en una granja avícola en la Región de Valparaíso, Chile, de áreas adyacentes

  5. International Conference Nuclear Energy in Central Europe 99, V. 2. Proceedings. Embedded Meeting Neutron Imaging Methods to Detect Defects in Materials

    International Nuclear Information System (INIS)

    International Conference Nuclear Energy in Central Europe is an annual meeting of the Nuclear Society of Slovenia. The second book of proceedings contain 14 articles from Slovenia, surrounding countries and countries of the Central and Eastern European Region. Topics cover Neutron Imaging Methods

  6. Nuevas regularidades estructurales de la Cuenca Central (Cuba a partir de la interpretación cualitativa de datos gravimétricos

    Directory of Open Access Journals (Sweden)

    Jesús A. Blanco-Moreno

    2007-03-01

    Full Text Available La Cuenca Central es uno de los lugares de mayor interés geológico y económico de la isla por sus importantes yacimientos de petróleo. Durante la exploración se realizaron levantamientos gravimétricos 1:100 000 cuyos datos se interpretaron cualitativamente teniendo en cuenta resultados de otras áreas. Inicialmente se realizaron transformaciones del campo gravimétrico (Continuación Ascendente y cálculos de gradientes horizontales y se representaron en mapas de isolineas y de relieve sombreado. Se establecieron nuevas regularidades estructurales de la cuenca que evidencian el marcado control tectónico de la región. La mayoría de los sistemas de fallas conocidos se relacionan con alineaciones del campo gravimétrico, de igual manera existen zonas alineadas, principalmente de direcciones noroeste-sureste y noreste-suroeste, que no se asocian a estos sistemas, y que pueden constituir zonas de fallas no reportadas. La presencia de grandes zonas anómalas positivas debajo de las secuencias cuaternarias indica la existencia en profundidad de secuencias vulcanógenas-sedimentarias o vulcanógenas depositadas durante la actividad volcánica cretácica. Se define una zona de altos gradientes con dirección noreste-suroeste que sugiere el límite entre las secuencias plegadas y sobrecorridas del paleomargen pasivo y el hemigraben de la Cuenca Central. Las rocas de bajas densidades alcanzan grandes profundidades hacia el extremo noroccidental y central de la región, mientras que al occidente alcanzan grandes profundidades las de altas densidades. Los elementos antes señalados permitirán una mejor planificación de investigaciones geológicas en la región.

  7. El tarwi o chocho: una de las principales fuentes de proteína vegetal de las comunidades indígenas de los Andes Centrales

    Directory of Open Access Journals (Sweden)

    Planchuelo, Ana M.

    2005-01-01

    Full Text Available El lupino andino (Lupinus mutabilis Sweet conocido también como tarwi o chocho, es una especie de leguminosa nativa de los Andes Centrales. Su domesticación se remonta a los principios de la cultura Nazca y desde ese entonces hasta la actualidad el cultivo está ampliamente difundido en las laderas montañosas y en los altos valles de Ecuador, Perú y Bolivia. La importancia del lupino para las comunidades andinas prehispánicas quedo documentada en pinturas de cerámicas y en tributos encontrados en tumbas de 100-150 años AC. Diversas técnicas de lavado y de mejoramiento vegetal fueron aplicadas desde la antigüedad para eliminar los alcaloides tóxicos que le confieren el sabor amargo a la planta y los granos. El tarwi, el maíz. los frijoles, los pseudocereales, quinoa y amaranto y la papa junto a otras raíces y tubérculos constituyen la comida básica de muchas culturas andinas. El objetivo de este trabajo fue determinar los componentes nutricionales de los granos del lupino andino para compararlos con los otros constituyentes de la dieta de las comunidades campesinas. Se analizaron por medio de técnicas fitoquímicas distintas variedades de tarwi. Se determinaron los contenidos de proteínas y grasas y los patrones de ácidos grasos. Los resultados muestran que la ingesta de lupinos, que provee un buen balance de proteínas y grasas en combinación con el maíz y los tubérculos, que aportan los hidratos de carbono, forman una dieta balanceada y de alto valor nutricional.

  8. Esquistossomose do sistema nervoso central relato de um caso

    Directory of Open Access Journals (Sweden)

    M. S. Ferreira

    1990-09-01

    Full Text Available O comprometimento do sistema nervoso na esquistossomose mansônica é evento raramente diagnosticado na evolução desta parasitose. Os autores descrevem o caso de uma paciente de 23 anos, natural de São Francisco-MG, que apresentava há duas semanas quadro de ceíaléia, vômitos em jato, febre e sonolência; o exame neurológico mostrava rigidez de nuca, paresia com hipertonia muscular bilateral em membros superiores, perda de motricidade e sensibilidade em membros inferiores. Não se palpava hepato-esplenomegalia. O exame do liqüido cefalorraquidiano (LCR mostrou hipoglicorraquia (28 mg%, hiperproteinorraquia (113 mg% e pleocitose acentuada (949 células/mm3, com predomínio de neutrófilos (70%, além de eosinofilorraquia (9%. A reação de imunofluorescência indireta para esquistossomose, no LCR, realizada em cortes de fígado com granuloma peri-ovular foi reagente (IgG: 1/16; IgM: 1/4. As pesquisas de fungos e b.a.a.r. no LCR, assim como a cultura para b.a.a.r. (após 60 dias e as reações imunológicas para neurocisticercose foram negativas. Uma tomografia computadorizada do cérebro e medula espinhal não evidenciou anormalidades. No exame parasitologico das fezes foi identificada a presença de ovos viáveis de S. mansoni. Instituiu-se tratamento com corticóides e praziquantel (60 mg/kg/dia; 7 dias tendo havido regressão das alterações do LCR, permanecendo entretanto seqüelas neurológicas graves (paraplegia e bexiga neurogênica.

  9. Analgesia e sedacao durante a instalacao do cateter central de insercao periferica em neonatos

    Directory of Open Access Journals (Sweden)

    Priscila Costa

    2013-08-01

    Full Text Available Objetivou-se caracterizar as estratégias de analgesia e sedação em neonatos submetidos à instalação do cateter central de inserção periférica (CCIP e relacioná-las ao número de punções venosas, duração do procedimento e posicionamento da ponta do cateter. Estudo transversal com coleta prospectiva de dados, realizado em uma unidade de cuidados intensivos neonatais de um hospital privado na cidade de São Paulo, no período de 31 de agosto de 2010 a 01 de julho de 2011, em que foram avaliadas 254 inserções do CCIP. A adoção de estratégias analgésicas ou sedativas ocorreu em 88 (34,6% instalações do cateter e não esteve relacionada ao número de punções venosas, duração do procedimento ou posicionamento da ponta do cateter. As estratégias mais frequentes foram a administração endovenosa de midazolam em 47 (18,5% e fentanil em 19 (7,3% inserções do cateter. Recomenda-se maior adoção de estratégias analgésicas antes, durante e após o procedimento.

  10. Work report 1992-1993 Instituto Nacional de Investigaciones Nucleares

    International Nuclear Information System (INIS)

    During the term encompassed by this report, the ININ carried out the relevant actions in order to make progress in the achievement of the goals and objectives established in the 1990-1994 mid-term institutional program. The report is formed by 3 sections and one appendix: The first section is entitled: The importance of the entity in the national economic context and the para state industrial sector (1992-1993), which presents an approach of the functions taken on and performed by the institution among which the support given to the Central of Laguna Verde (CLV), from the Federal Electricity Commission, is stressed through qualification of personnel, processes and equipment and the operation of the pilot plant for the manufacture of fuel assemblies; technical courses; studies on the management of the nuclear fuel; classification of the equipment and components conferred to nuclear security functions; computer systems development; Reactor engineering; instrumentation and technical maintenance for radiological protection during the operation of unit I. The Institute conformed great part of the basic and applied research projects in several disciplines related to nuclear sciences. According to the indicative actions of the 1990-1994 national program for energy modernization, the priority activities of the Institute were oriented to the integral development of nuclear fuels; contribution to the security in nuclear and radiative facilities; collection, treatment and storage of radiative disposal; the development of nuclear techniques applied in the health, agricultural and industrial sectors, are some of the points considered in the second section. Regarding the structural change, progress and results for the 1992-1993 term considered in the third section, it is established that the Institute continued with its actions of the modernization program established for the term and the beginning of the study of integral restructuring, to identify the new fields of action, to

  11. Microdureza del esmalte dental en incisivos centrales permanentes de dos genotipos bovinos

    Directory of Open Access Journals (Sweden)

    Jorge Cabrera A

    2011-04-01

    Full Text Available Objetivo. Evaluar la microdureza del esmalte dental de novillos criollos de origen patagónico y cruza índica criados en ambientes diferentes. Materiales y métodos. Se utilizaron dientes incisivos centrales derechos de novillos adultos: ocho Criollos Patagónicos (GCP y siete Cruzas Índicas (GCI. Para cada diente se definió una transecta central recorriendo el diente desde el borde externo del esmalte hacia la dentina y se midió la dureza en tres profundidades equidistantes: a 30 μ del borde exterior (P1, a 30 μ previos a la conexión amelodentinaria (P3 y P2 equidistante entre P1 y P3. Las mediciones de microdureza se realizaron con un microdurómetro Shimadzu modelo HMV-2 y se expresaron en unidades Vickers. Para el análisis se utilizó un modelo de regresión aleatoria. Se empleó el criterio de información de Akaike para la elección de la estructura de las matrices asociadas a los efectos aleatorios. Para el análisis estadístico se empleó el procedimiento PROC MIXED de SAS, y un nivel de significación del 5%. Resultados. No se detectó falta de paralelismo entre los grupos (p>0.05, con lo cual se ajustaron rectas de igual pendiente en cada grupo. La dureza media del esmalte disminuyó al aumentar la profundidad de la medición para ambos genotipos. Se observó heterogeneidad en la variabilidad de los grupos. Conclusiones. El GCP presentó mayor dureza pero fue el de mayor variabilidad. Se confirma la disminución de la dureza media con el aumento de la profundidad en el esmalte independientemente del genotipo y el ambiente.

  12. Role of nuclear factor kappa B in central nervous system regeneration

    Institute of Scientific and Technical Information of China (English)

    Christian Engelmann; Falk Weih; Ronny Haenold

    2014-01-01

    Activation of nuclear factor kappa B (NF-κB) is a hallmark of various central nervous system (CNS) pathologies. Neuron-speciifc inhibition of its transcriptional activator subunit RelA, also referred to as p65, promotes neuronal survival under a range of conditions, i.e., for ischemic or excitotoxic insults. In macro-and microglial cells, post-lesional activation of NF-κB triggers a growth-permissive program which contributes to neural tissue inlfammation, scar formation, and the expression of axonal growth inhibitors. Intriguingly, inhibition of such inducible NF-κB in the neuro-glial compartment, i.e., by genetic ablation of RelA or overexpression of a trans-dominant negative mutant of its upstream regulator IκBα, significantly enhances functional recovery and promotes axonal regeneration in the mature CNS. By contrast, depletion of the NF-κB subunit p50, which lacks transcriptional activator function and acts as a transcriptional repressor on its own, causes precocious neuronal loss and exacerbates axonal degeneration in the lesioned brain. Collectively, the data imply that NF-κB orchestrates a multicellular pro-gram in whichκB-dependent gene expression establishes a growth-repulsive terrain within the post-lesioned brain that limits structural regeneration of neuronal circuits. Considering these subunit-speciifc functions, interference with the NF-κB pathway might hold clinical potentials to improve functional restoration following traumatic CNS injury.

  13. Masses and Scaling Relations for Nuclear Star Clusters, and their Coexistence with Central Black Holes

    CERN Document Server

    Georgiev, Iskren Y; Leigh, Natan; Lützgendorf, Nora; Neumayer, Nadine

    2016-01-01

    Galactic nuclei typically host either a Nuclear Star Cluster (NSC, prevalent in galaxies with masses $\\lesssim 10^{10}M_\\odot$) or a Massive Black Hole (MBH, common in galaxies with masses $\\gtrsim 10^{12}M_\\odot$). In the intermediate mass range, some nuclei host both a NSC and a MBH. In this paper, we explore scaling relations between NSC mass (${\\cal M}_{\\rm NSC}$) and host galaxy total stellar mass (${\\cal M}_{\\star,\\rm gal}$) using a large sample of NSCs in late- and early-type galaxies, including a number of NSCs harboring a MBH. Such scaling relations reflect the underlying physical mechanisms driving the formation and (co)evolution of these central massive objects. We find $\\sim\\!1.5\\sigma$ significant differences between NSCs in late- and early-type galaxies in the slopes and offsets of the relations $r_{\\rm eff,NSC}$--${\\cal M}_{\\rm NSC}$, $r_{\\rm eff, NSC}$--${\\cal M}_{\\star,\\rm gal}$ and ${\\cal M}_{\\rm NSC}$--${\\cal M}_{\\star,\\rm gal}$, in the sense that $i)$ NSCs in late-types are more compact at...

  14. Report on the Fourth Reactor Refueling. Laguna Verde Nuclear Central. Unit 1. April-May 1995

    International Nuclear Information System (INIS)

    The fourth refueling of the Unit 1 of Laguna Verde Nuclear Central was executed in the period of April 17 to May 31 of 1995 with the participation of a task group of 358 persons, included technicians and radiation protection officials and auxiliaries.The radiation monitoring and radiological surveillance to the workers was present length ways the refueling process and always attached to the ALARA criteria. The check points for radiation levels were set at: primary container or dry well, reloading floor, decontamination room (level 10.5), turbine building and radioactive waste building. To take advantage of the refueling process, rooms 203 and 213 of the turbine buildings were subject to inspection and maintenance work in valves, heaters and drains of heaters. Management aspects as personnel selection and training, costs, and countable are also presented in this report. Owing to the high cost of man-hour of the members of the ININ staff, its participation in the refueling process was in smaller number than years before. (Author)

  15. Ground beetles (Coleoptera, Carabidae of the Hanford Nuclear Site in south-central Washington State

    Directory of Open Access Journals (Sweden)

    Chris Looney

    2014-04-01

    Full Text Available In this paper we report on ground beetles (Coleoptera: Carabidae collected from the Hanford Nuclear Reservation and Hanford National Monument (together the Hanford Site, which is located in south-central Washington State. The Site is a relatively undisturbed relict of the shrub-steppe habitat present throughout much of the western Columbia Basin before the westward expansion of the United States. Species, localities, months of capture, and capture method are reported for field work conducted between 1994 and 2002. Most species were collected using pitfall traps, although other capture methods were employed. Trapping results indicate the Hanford Site supports a diverse ground beetle community, with over 90% of the 92 species captured native to North America. Four species collected during the study period are newly recorded for Washington State: Bembidion diligens Casey, Calosoma obsoletum Say, Pseudaptinus rufulus (LeConte, and Stenolophus lineola (Fabricius. Based on these data, the Site maintains a diverse ground beetle fauna and, due to its size and diversity of habitats, is an important repository of shrub-steppe biodiversity.

  16. Ground beetles (Coleoptera, Carabidae) of the Hanford Nuclear Site in south-central Washington State

    Science.gov (United States)

    Looney, Chris; Zack, Richard S.; LaBonte, James R.

    2014-01-01

    Abstract In this paper we report on ground beetles (Coleoptera: Carabidae) collected from the Hanford Nuclear Reservation and Hanford National Monument (together the Hanford Site), which is located in south-central Washington State. The Site is a relatively undisturbed relict of the shrub-steppe habitat present throughout much of the western Columbia Basin before the westward expansion of the United States. Species, localities, months of capture, and capture method are reported for field work conducted between 1994 and 2002. Most species were collected using pitfall traps, although other capture methods were employed. Trapping results indicate the Hanford Site supports a diverse ground beetle community, with over 90% of the 92 species captured native to North America. Four species collected during the study period are newly recorded for Washington State: Bembidion diligens Casey, Calosoma obsoletum Say, Pseudaptinus rufulus (LeConte), and Stenolophus lineola (Fabricius). Based on these data, the Site maintains a diverse ground beetle fauna and, due to its size and diversity of habitats, is an important repository of shrub-steppe biodiversity. PMID:24715791

  17. Analizan partículas calientes del accidente nuclear de Palomares

    OpenAIRE

    León Dueñas, Sergio David

    2012-01-01

    Investigadores pertenecientes al Centro Nacional de Aceleradores, CNA, (Universidad de Sevilla-Junta de Andalucía-CSIC) en colaboración con la Organización Internacional de la Energía Atómica (IAEA), han llevado a cabo me didas de elementos transuránicos en partículas calientes procedentes de accidentes nucleares tales como el de Thule (Groenlandia) o Palomares (España).

  18. Elecnuc. Nuclear power plants in the world; Elecnuc. Les centrales nucleaires dans le monde

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This small booklet summarizes in tables all data relative to the nuclear power plants worldwide. These data come from the IAEA's PRIS and AREVA-CEA's GAIA databases. The following aspects are reviewed: 2007 highlights; Main characteristics of reactor types; Map of the French nuclear power plants on 2007/01/01; Worldwide status of nuclear power plants (12/31/2007); Units distributed by countries; Nuclear power plants connected to the Grid- by reactor type groups; Nuclear power plants under construction on 2007; Evolution of nuclear power plants capacities connected to the grid; First electric generations supplied by a nuclear unit in each country; Electrical generation from nuclear power plants by country at the end 2007; Performance indicator of French PWR units; Evolution of the generation indicators worldwide by type; Nuclear operator ranking according to their installed capacity; Units connected to the grid by countries at 12/31/2007; Status of licence renewal applications in USA; Nuclear power plants under construction at 12/31/2007; Shutdown reactors; Exported nuclear capacity in net MWe; Exported and national nuclear capacity connected to the grid; Exported nuclear power plants under construction; Exported and national nuclear capacity under construction; Nuclear power plants ordered at 12/31/2007; Long term shutdown units at 12/31/2007; COL (combined licences) applications in the USA; Recycling of Plutonium in reactors and experiences; Mox licence plants projects; Appendix - historical development; Meaning of the used acronyms; Glossary.

  19. LA INFLACIÓN Y EL BANCO CENTRAL: ECONOMÍA DE UN EMISOR INDEPENDIENTE

    Directory of Open Access Journals (Sweden)

    Carlos Esteban Posada P

    2002-06-01

    Full Text Available En este artículo formulo una relación teórica de fundamento microeconómico entre un Banco privado monopólico y la tasa óptima de inflación. La relación propuesta es la base para establecer una condición suficiente para la independencia de la Banca Central. La parte central del artículo lo consti tuye un modelo que expone las condiciones que se requieren para igualar las tasas óptimas, social y privada, de la inflación. A pesar de la sencillez del argumento, se pueden deducir algunas proposiciones de "Economía Constitucional".

  20. Caracterización de agrietamientos poligonales sobre granito en la Pedriza de Manzanares y en Cenicientos, Madrid (Sistema Central)

    OpenAIRE

    García-Rodríguez, M. (Mariano); Gómez-Heras, Miguel; Álvarez de Buergo, Mónica; Fort González, Rafael; Centeno Carrillo, J. D.

    2014-01-01

    El Sistema Central español recorre el interior de la Península Ibérica en dirección Este - Oeste y está constituido principalmente por granitoides y gneises. Los granitoides incluyen distintos tipos de granito, con variaciones mineralógicas y texturales. Estos granitos muestran un complejo sistema de fracturas producidas durante las orogenias Varsica y Alpina que han dado como resultado paisajes con paredes de alturas que pueden superar el centenar de metros, alternando con bolos sueltos (La ...

  1. Mortality pattern of the surrounding population of the Central Nuclear Almirante Alvaro Alberto / 1986 to 2007; Padrao da mortalidade da populacao circunvizinha a Central Nuclear Almirante Alvaro Alberto / 1986 a 2007

    Energy Technology Data Exchange (ETDEWEB)

    Leite, Teresa Cristina Sampaio de Barros; Silva, Ilson Peixoto Medeiros da; Jannuzzi, Denise Maria Souza; Higino, Thiago Nunes; Santos, Tatiana Rodrigues dos [Fundacao Eletronuclear de Assistencia Medica (CIRA/FEAM), Angra dos Reis, RJ (Brazil). Centro de Informacoes sobre Radioepidemiologia; Xavier, Diego Ricardo [Fundacao Inst. Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ (Brazil). lnst. de Comunicacao e Informacao Cientifica e Tecnologica; Silva, Roseli Monteiro da [Fundacao Inst. Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ (Brazil)

    2011-05-15

    This paper aims to update two earlier epidemiological studies on the mortality profile of the resident population in the influence area of the Central Nuclear Almirante Alvaro Alberto. The main objective is analyze and compare the profile of mortality among the population classified in areas with the distance from source of exposure in three strata. Municipalities contained within a radius of 30 km of the nuclear power, neighboring municipalities, contained within a radius of 30 to 50 km, municipalities contained within 50 to 100 km, beyond Cabo Frio, which presents similar characteristics to the municipality of Angra dos Reis

  2. Factores que inciden sobre el tiempo de permanencia de un catéter endovenoso central Factors that affect the dwell time of a central venous catheter

    Directory of Open Access Journals (Sweden)

    H. Bello-Villalobos

    2006-06-01

    Full Text Available Objetivo: Determinar los factores que inciden en el tiempo de permanencia de un catéter endovenoso central. Antecedentes: En el paciente con cáncer existen factores propios del estado de inmunocompromiso por el tumor y los efectos colaterales de su tratamiento que aumentan la probabilidad de infección y consecuentemente reducen el tiempo de uso de un catéter. Sujetos: Se integró una cohorte de 306 pacientes con cáncer, con una edad promedio de 59 ± 14,5 años. Intervenciones: Se definió tiempo cero como el día de colocación del catéter. Diariamente se buscaron signos clínicos de infección por catéter, con toma de hemocultivos simultáneos cada 7 días. El desenlace primario fue infección del catéter y el alternativo fin de tratamiento, obstrucción o fallecimiento del paciente. Se comparó el tiempo de permanencia del catéter infectado vs no infectado y su relación con factores de riesgo potenciales. Resultados: Se colocaron 306 catéteres para un total de 4.043 días/catéter. Se infectaron 25 (8,2%. La sobrevida media global fue de 50 días. Se encontró que a mayor tiempo de permanencia, mayor fue la incidencia de infección. En el análisis de sobrevida ajustado, la presencia de infección a distancia (OR = 4,71, IC95% = 1,7-10,1, p = 0,002 fue el factor que mostró una asociación significativa. Conclusiones: El tiempo de vida útil de un catéter es amplia, limitada por la presencia de infección a distancia como factor de riesgo potencial de infección por catéter.Objective: To determine the factors that affect the dwell time of a central venous catheter. Background: The own immunodeficiency in cancer patient and the collateral effects of their treatment increase the probability of infection and reduce the time of use of a catheter. Subjects: Incipient cohort of 306 patients with cancer, with an average age of 59 ± 14.5 years. Interventions: Time zero like the day of the placement of the catheter was defined. Daily

  3. Proliferación Nuclear y Estado de Excepción (Nuclear Proliferation and State of Exception

    Directory of Open Access Journals (Sweden)

    Gian Carlo Delgado

    2008-01-01

    Full Text Available Desde el 11.09, es observable un recrudecimiento de las medidas y acciones en la denominada "guerra contra el terrorismo". La concentración de poderes por parte del ejecutivo estadounidense, la erogación o suspensión de diversas Leyes son indicativos, entre otros, de la instauración de facto de un Estado de Excepción que, además se encuentra empantanado en una dinámica de guerra altamente desestabilizadora, sobre todo en términos de la seguridad internacional. Es un contexto en el que la carrera armamentista se viene acelerando, incluyendo su variable nuclear –en parte estimulada por el animado empuje a la nucleoelectricidad como supuesta alternativa viable al cambio climático. En flagrante violación a diversos acuerdos internacionales, pero sobre todo, en este caso, del “Tratado de No Proliferación Nuclear”, Estados Unido viene jugando la carta nuclear de tal modo que ya muchos consideran que, de seguir esta tendencia, estamos en camino hacia una eventual "nueva era nuclear". Y es que debido a la diversidad de actores, variables e intereses involucrados, tanto a nivel global como regional, el orden de probabilidades de una confrontación con armas nucleares cada vez más se incrementa; en especial cuando las posturas de diversos países, pero fundamentalmente de EUA, se tornan cada vez más totalitarias. El reloj del juicio final no en vano ha sido recientemente ajustado dos minutos más cerca de una guerra general termonuclear. Since 11.09, it is observable an upsurge on the measures and actions meant for the progress of the so called “war on terrorism”. The concentration of power in the US Executive, the derogation of diverse laws or the suspension of civil rights, are aspects, among others, that indicate that in fact an State of Exception has been established. One that, what's more, it´s trapped in a highly and increasingly destabilizing dynamic of (petrowar in the Middle East which affects not only international

  4. Proliferación Nuclear y Estado de Excepción (Nuclear Proliferation and State of Exception

    Directory of Open Access Journals (Sweden)

    Gian Carlo Delgado

    2008-01-01

    Full Text Available Desde el 11.09, es observable un recrudecimiento de las medidas y acciones en la denominada "guerra contra el terrorismo". La concentración de poderes por parte del ejecutivo estadounidense, la erogación o suspensión de diversas Leyes son indicativos, entre otros, de la instauración de facto de un Estado de Excepción que, además se encuentra empantanado en una dinámica de guerra altamente desestabilizadora, sobre todo en términos de la seguridad internacional. Es un contexto en el que la carrera armamentista se viene acelerando, incluyendo su variable nuclear –en parte estimulada por el animado empuje a la nucleoelectricidad como supuesta alternativa viable al cambio climático. En flagrante violación a diversos acuerdos internacionales, pero sobre todo, en este caso, del “Tratado de No Proliferación Nuclear”, Estados Unido viene jugando la carta nuclear de tal modo que ya muchos consideran que, de seguir esta tendencia, estamos en camino hacia una eventual "nueva era nuclear". Y es que debido a la diversidad de  actores, variables e intereses involucrados, tanto a nivel global como regional, el orden de probabilidades de una confrontación con armas nucleares cada vez más se incrementa; en especial cuando las posturas de diversos países, pero fundamentalmente de EUA, se tornan cada vez más totalitarias. El reloj del juicio final no en vano ha sido recientemente ajustado dos minutos más cerca de una guerra general termonuclear. Since 11.09, it is observable an upsurge on the measures and actions meant for the progress of the so called “war on terrorism”. The concentration of power in the US Executive, the derogation of diverse laws or the suspension of civil rights, are aspects, among others, that indicate that in fact an State of Exception has been established. One that, what's more, it´s trapped in a highly and increasingly destabilizing dynamic of (petrowar in the Middle East which affects not only international

  5. Study of metrologic characteristics in activimeters used in Nuclear Medicine Centers in Colombia; Estudio de caracteristicas metrologicas en activimetros utilizados en centros de Medicina Nuclear de Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Davila, Hernan Olaya; Flores, Guillermo, E-mail: holayadavila@gmail.com [Instituto Colombiano de Geologia y Mineria (INGEOMINAS), Bogota, D.C. (Colombia). Laboratorio de Metrologia de las Radiaciones del Servicio Geologico Colombiano; Cantillo, Juliana I.P., E-mail: julianacantillo5@gmail.com [Universidad Pedagogica y Tecnologica de Colombia, Boyaca (Colombia)

    2013-07-01

    In our country currently there is a legislation that regulated de Nuclear Medicine practice, that establish the criteria about quality assurance in Nuclear Medicine and the justification to imparted to medical exposures. In this work includes some tests to the clinical approval in this type of instruments before to be used. The type of tests are linearity, geometric dependence and the energetic response and moreover to evaluate the total uncertainty during the work the physician using this equipment with radioactive sources. (author)

  6. Análise de um projecto de investimento na energia nuclear em Portugal

    OpenAIRE

    Flores, Pedro Tiago Marques

    2011-01-01

    Face ao aumento do consumo anual de electricidade verificado em Portugal e ao aumento dos preços dos combustíveis fósseis, é imperativo diversificar as fontes de energia disponíveis. A energia nuclear, no que concerne ao efeito de estufa, é menos nociva para o ambiente e constitui uma solução alternativa à dependência dos combustíveis fósseis. A energia nuclear continua a ser uma interessante área de pesquisa e estudo, não só para melhorar ainda mais a segurança, mas também para mino...

  7. Methodology for carrying out energy diagnosis in auxiliaries systems in thermal electrical central stations; Metodologia para realizar un diagnostico energetico en sistemas auxiliares de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Nebradt Garcia, Jesus [Comision Federal de Electricidad (CFE), Mexico, D. F. (Mexico); Rojas Hidalgo, Ismael; Huante Perez, Liborio [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    One of the potential areas for energy saving in Central Electric Power Plants are the auxiliaries system, so as to based in a preliminary energy diagnosis and considering that energy saving measures would be taken, going from the instrumentation, operational changes in equipment, as well as in using velocity variators in motors, it turns out to be that the energy consumption of auxiliaries at 75% load in a 150 MW thermal power plant varies from 3% to 4% and for the case of a 350 MW power plant the energy consumption of the auxiliaries represents 2 to 3.5%. Nowadays this consumption are above 6%. Considering that the country has 40 units with capacities varying from 150 to 350 MW, the economical and the fuel saving would be substantial. This paper will present a summary of the methodology to be used to carry out this type of projects. [Espanol] Una de las areas potenciales de ahorro de energia en centrales termoelectricas son los sistemas auxiliares, de tal manera que basados en un diagnostico energetico preliminar y considerando que se aplicarian las medidas de ahorro de energia que van desde la instrumentacion, cambios operativos en equipos, asi como el uso de variadores de velocidad en motores, se tienen que los consumos de auxiliares para un 75% de carga en una central termoelectrica de 150 MW varian desde un 3% hasta un 4% y para el caso de una central termoelectrica de 350 MW, el consumo de auxiliares representa del 2 al 3.5%. Hoy en dia dichos consumos estan por encima del 6%. Si consideramos que el pais cuenta con 40 unidades que varian desde 150 MW hasta 350 MW, entonces los ahorros economicos y de combustible serian impactantes. La presente ponencia mostrara un resumen de la metodologia a emplear para la realizacion de este tipo de proyectos.

  8. Microdureza del esmalte dental en incisivos centrales permanentes de dos genotipos bovinos

    OpenAIRE

    Jorge Cabrera A; Nidia Abbiati C; Eduardo Fernández T; Rubén Martínez M.

    2011-01-01

    Objetivo. Evaluar la microdureza del esmalte dental de novillos criollos de origen patagónico y cruza índica criados en ambientes diferentes. Materiales y métodos. Se utilizaron dientes incisivos centrales derechos de novillos adultos: ocho Criollos Patagónicos (GCP) y siete Cruzas Índicas (GCI). Para cada diente se definió una transecta central recorriendo el diente desde el borde externo del esmalte hacia la dentina y se midió la dureza en tres profundidades equidistan...

  9. Elecnuc. Nuclear power plants in the world; Elecnuc. Les centrales nucleaires dans le monde

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    This 2003 version of Elecnuc contents information, data and charts on the nuclear power plants in the world and general information on the national perspectives concerning the electric power industry. The following topics are presented: 2002 highlights; characteristics of main reactor types and on order; map of the French nuclear power plants; the worldwide status of nuclear power plants on 2002/12/3; units distributed by countries; nuclear power plants connected to the Grid by reactor type groups; nuclear power plants under construction; capacity of the nuclear power plants on the grid; first electric generations supplied by a nuclear unit; electrical generation from nuclear plants by country at the end 2002; performance indicator of french PWR units; trends of the generation indicator worldwide from 1960 to 2002; 2002 cumulative Load Factor by owners; nuclear power plants connected to the grid by countries; status of license renewal applications in Usa; nuclear power plants under construction; Shutdown nuclear power plants; exported nuclear power plants by type; exported nuclear power plants by countries; nuclear power plants under construction or order; steam generator replacements; recycling of Plutonium in LWR; projects of MOX fuel use in reactors; electricity needs of Germany, Belgium, Spain, Finland, United Kingdom; electricity indicators of the five countries. (A.L.B.)

  10. Analysis of the problems of induced draft fans in a carbo-electric power station; Analisis de la problematica de ventiladores de tiro inducido de una central carboelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Diaz Sanchez, Valentin de Jesus; Vital Flores, Francisco [LAPEM, Comision Federal de Electricidad (Mexico)

    2007-11-15

    The induced draft fans of the 350 MW units of a Thermo-electric power plant presented problems consisting of the failure of the capacity of gases extraction, together with the presence of cracks in the blades; this condition was observed since the stage of putting into service. Consequently, losses have been originated in the availability in two units, as well as, losses due to the manufacture of new impellers, which also originated that, in some cases, that the measures of the impellers, locally manufactured, differed from the originals, resulting in differences in the unit's efficiency. [Spanish] Los ventiladores tiro inducido de las unidades de 350 MW de una Central Termoelectrica presentaban una problematica consistente en la falla de capacidad de extraccion de gases, aunado a la presencia de fracturas en las aspas de los impulsores, esta condicion se observo desde la etapa de puesta en servicio. En consecuencia se han ocasionado perdidas de disponibilidad en dos unidades, asi como tambien, perdidas debido a la fabricacion de nuevos impulsores, lo que tambien origino que, en algunos casos, las medidas de los impulsores, fabricados localmente, diferian de los originales, dando como resultado diferencias en la eficiencia de las unidades.

  11. Tax morale and (de-)centralization: An experimental study

    OpenAIRE

    Güth, Werner; Levati, Maria Vittoria; Sausgruber, Rupert

    2005-01-01

    We consider an economy composed of two regions. Each of them provides a public good whose benefits reach beyond local boundaries. In case of decentralization, taxes collected by members of a region are spent only on that region's public good. In case of centralization, tax receipts from the two regions are pooled and used to finance both public goods according to the population size of each region. The experiment shows that centralization induces lower tax morale and less efficient outcomes. ...

  12. COMPARAÇÃO DO RECOLHIMENTO DE EMBALAGENS VAZIAS DE AGROTÓXICOS DE QUATRO USINAS NA CENTRAL DE RECEBIMENTO DE EMBALAGENS VAZIAS DE AGROTÓXICOS DE ITUVERAVA-SP NO PERÍODO DE 2004 A 2007

    Directory of Open Access Journals (Sweden)

    PEREIRA, Regina Eli de Almeida

    2008-01-01

    Full Text Available The advance in cane sugar production is leading the industries of defense to develop researchesof new products from Brazil. The final destination of empty containers of pesticides is a complex procedurethat requires the effective participation of all those who are Ituverava involved in the production chain. In thisstudy it was sought valley to compare the volume returned plants Ituverava Central by Rosary Valley, AltaMogiana, Cosan and Buriti plants during the period 2004 to 2007. Analized data were analyzed during theperiod 2004 to 2007, concerning the delivery it of empty containers of pesticides collected by the four plantsin Central Ituverava-SP. It was evaluated the volume in tonnes, annually, in the four plants, received by theCentral which were tabulated and compared lamang them other. It was observed that Vale do Rosario showeda steady increase in the collection of such packaging, basically doubling this volume from 2004 to 2007. Theother Plants also showed an increase in its collection, however there was a variation of this amount from one year to another, more obvious in Usinas Cosan and Buriti. The usina Buriti, in spite of showing a collection, alsoshowed an increasing, decreasing only in 2007. Broadly speaking, the volume of packaging discarded by Usinashas increased in recent years, showing greater commitment of this link in the chain with the process of finaldestination and, thus, contributing to the increase in the number of packages collected by the Center Ituverava.O avanço na produção de cana-de-açúcar está levando as indústrias de defensivos a desenvolverempesquisas de novos produtos a partir do Brasil. A destinação final das embalagens vazias de agrotóxicos é umprocedimento complexo que requer a participação efetiva de todos os agentes envolvidos na cadeia de produção.No presente trabalho, buscou-se comparar o volume devolvido, na Central de Ituverava, pelas Usinas Vale doRosário, Alta Mogiana, Cosan e Buriti

  13. Sede central de LENOX, New Jersey - EE. UU.

    Directory of Open Access Journals (Sweden)

    Hellmuth, George

    1979-10-01

    Full Text Available The main headquarters of the Company, recently built in Lawrence Township, New Jersey, meets every requirement of ecological adaptation, ease of function, optimal and varied natural lighting convenient vertical and horizontal traffic, etc, necessary for a modern administrative and office compound. The layout is based on an octagonal module. The bearing elements are structural metal, the outside walls are prefab concrete and glass shapes, the glazing being insulating tinted glass, partitions are flexible and do not reach the ceiling. Al! this, and the design of vertical cores (lifts-stairways and amenities and services, makes this building an excellent plant, satisfying demands imposed by the owner.

    El edificio rector de la empresa, recientemente construido en Lawrence Township, New Jersey, reúne todas las condiciones de ambientación ecológica, comodidad de funcionamiento, óptima y variada iluminación natural, fáciles comunicaciones verticales y horizontales, etc. que se requieren para un moderno centro administrativo y de oficinas. Se ha utilizado el módulo octogonal, en planta, la estructura metálica como elemento resistente, los cerramientos a base de placas prefabricadas de hormigón y cristal coloreado aislante, divisiones móviles de altura media y núcleos verticales de escaleras, ascensores y servicios, con lo que se ha logrado un resultado excelente, que satisface las exigencias propuestas por la entidad propietaria.

  14. Granuloma Central de Células Gigantes - A propósito de um caso clínico

    OpenAIRE

    Joaquim Ramalhão; Pedro Mesquita; Cristina Trigo-Cabral

    2002-01-01

    O Grauloma Central de Células Gigantes é, de acordo com a Organização MNundial de Saúde, uma lesão óssea não neoplásica.Histologicamente, caracteriza-se pela presença de um tecido fibroso, contendo múltiplos focos hemorrágicos e células gigantes multinucleadas. Por vezes, observam-se, atravessando a lesão, trabéculas de osso lamelar no senio do tecido fibroso maduro.Os autores apresentam um caso clínico de um paciente do sexo masculino, de raça caucasiana, com 14 anos de idade. Ao exame intra...

  15. Measurement of void fractions by nuclear techniques; Medicion de fracciones de vacio por tecnicas nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez G, A.; Vazquez G, J.; Diaz H, C.; Salinas R, G.A. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1997-07-01

    In this work it is done a general analysis of those techniques used to determine void fractions and it is chosen a nuclear technique to be used in the heat transfer circuit of the Physics Department of the Basic Sciences Management. The used methods for the determination of void fractions are: radioactive absorption, acoustic techniques, average velocity measurement, electromagnetic flow measurement, optical methods, oscillating absorption, nuclear magnetic resonance, relation between pressure and flow oscillation, infrared absorption methods, sound neutron analysis. For the case of this work it will be treated about the radioactive absorption method which is based in the gamma rays absorption. (Author)

  16. Rehabilitación del Mercado Central de Cárdenas, propuesta de intervención ingeniera.

    Directory of Open Access Journals (Sweden)

    Manuel Pedroso Martínez

    2016-01-01

    Full Text Available La ciudad de Cárdenas tiene entre sus íconos más prominentes el edificio del Mercado Central. Actualmente el inmueble de 3572m2 de área construida es ocupado únicamente por una panadería y algunos comerciantes que hacen uso esporádico del primer nivel, el resto es un área subutilizada empleada para la concertación de actividades ilícitas y lúdicas. Este estado de semi abandono es la causa fundamental del estado de deterioro actual. Es necesario realizar una intervención ingeniera inminente para detener la evolución de las lesiones y procesos patológicos, razón por la cual se realiza en el presente estudio una propuesta de intervención ingeniera de conservación del Mercado Central de la ciudad de Cárdenas teniendo en cuenta su condición de patrimonio cultural de gran significación local y nacional incluso, con los retos técnico-conceptuales que ello implicará. Para ello se realiza una investigación con base en el método de investigación científica del tipo empírico y otras herramientas de investigación que sirvieron para estructurar la investigación en tres capítulos. Primeramente se analizará el estado del arte referente a la conservación de edificaciones con valor patrimonial y las tendencias nacionales y foráneas en edificaciones similares. Se realiza el estudio patológico de las lesiones presentes en el inmueble a partir del análisis de cada uno de los elementos componentes fundamentado en la utilización de medios organolépticos. Se hace además una valoración del estado técnico-constructivo del inmueble mediante el empleo de un método científico validado en investigaciones precedentes. Como resultado se obtiene una propuesta de intervención ingeniera definiéndose todas las acciones necesarias, el costo estimado y la secuencia de etapas de la obra.

  17. Development of a methodology for nuclear data uncertainty propagation on isotopic evolution calculations for advanced nuclear systems

    OpenAIRE

    Diez de la Obra, Carlos Javier

    2014-01-01

    Una apropiada evaluación de los márgenes de seguridad de una instalación nuclear, por ejemplo, una central nuclear, tiene en cuenta todas las incertidumbres que afectan a los cálculos de diseño, funcionanmiento y respuesta ante accidentes de dicha instalación. Una fuente de incertidumbre son los datos nucleares, que afectan a los cálculos neutrónicos, de quemado de combustible o activación de materiales. Estos cálculos permiten la evaluación de las funciones respuesta esenciales para el funci...

  18. Integral power evaluation in fossil fuel power plants; Evaluacion energetica integral en unidades de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Figueroa I, Luis R; Sanchez H, Laura E; Rodriguez M, Jose H [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Nebradt G, Jesus [Unidad de Investigacion y Desarrollo de la Subdireccion de Generacion de la Comision Federal de Electricidad, (Mexico)

    2006-07-01

    In this occasion, a methodology is presented that carries out an integral energy evaluation of fossil fuel power plants units (FFPPU) with the purpose of determining the root of the significant decrements of power produced soon after the annual maintenance service. This proposal, besides identifying the origin of the energy efficiency problems, offers information about the contributions of each one of the involved equipment in the total decrement of the unit. With this methodology, the maintenance focuses in the equipment that contributes to the greater energy loss. This document presents such methodology along with its application in a real case, results and necessary remedial actions, demonstrating that its application offers bases for the investment in corrective measures. [Spanish] En esta ocasion se presenta una metodologia que efectua una evaluacion energetica integral de las unidades de centrales termoelectricas (UCT) con el fin de determinar la raiz de los decrementos de potencia significativos producidos luego del servicio anual de mantenimiento. Dicha propuesta, ademas de identificar el origen de los problemas de eficiencia energetica, brinda informacion acerca de las aportaciones de cada uno de los equipos involucrados al decremento total de la unidad. Con esta metodologia, el mantenimiento se enfoca a los equipos que contribuyen a la mayor perdida de potencia. Este documento exhibe tal metodologia junto con su aplicacion en un caso real, resultados y las acciones correctivas necesarias, demostrando que su aplicacion ofrece bases para una inversion futura en medidas correctivas.

  19. A ínsula e o conceito de bloco cerebral central The insula and the central core concept

    Directory of Open Access Journals (Sweden)

    Guilherme Carvalhal Ribas

    2007-03-01

    Full Text Available A caracterização anatômica de regiões encefálicas topograficamente bem definidas é particularmente útil para a prática neurocirúrgica por propiciar melhor compreensão da tridimensionalidade das suas estruturas e das lesões que as acometem, e por incitar uma maior sistematização dos seus acessos cirúrgicos. Neste sentido, se destaca no interior de cada hemisfério cerebral, um verdadeiro bloco único composto externamente pela ínsula, internamente pelos núcleos da base e tálamo, e que abriga no seu interior a cápsula interna. Com uma conformação predominantemente biconvexa e disposto entre a cisterna silviana e as cavidades ventriculares supratentoriais, esse bloco cerebral central morfologicamente se caracteriza como uma cabeça de cada metade do tronco encefálico, encoberta por todo o manto neocortical do seu hemisfério ao qual se une através de verdadeiros istmos constituídos pelos prolongamentos das diferentes partes da cápsula interna. Anteriormente e sob o sulco limitante anterior da ínsula se dispõem as fibras que compõem o ramo anterior da cápsula interna, superiormente e sob o seu sulco limitante superior se dispõem as fibras restantes do ramo anterior e as do joelho e do ramo posterior, entre as quais se destacam em importância funcional as fibras piramidais córtico-espinhais, e sob o sulco limitante inferior da ínsula se dispõem as partes retro e sub-lentiformes da cápsula interna, que englobam as radiações auditiva e visual. Lateralmente o bloco cerebral central tem a ínsula como um verdadeiro escudo externo das principais estruturas cerebrais subcorticais. As escolhas dos acessos microneurocirúrgicos às lesões relacionadas com o bloco cerebral central devem ter como maior preocupação as suas relações topográficas com o tálamo e com as fibras da cápsula interna.The caracterization of well defined and circumscribed brain regions is particularly useful for the neurosurgical practice once

  20. Characterization of Patients with Central Nervous System Infections Caracterización de pacientes con infecciones del sistema nervioso central

    Directory of Open Access Journals (Sweden)

    Benigno Figueiras Ramos

    2011-07-01

    agentes causales que las producen. Objetivo: caracterizar a pacientes con infecciones del sistema nervioso central. Métodos: estudio descriptivo de serie de casos realizado en el Hospital “Dr. Gustavo Aldereguía Lima” de Cienfuegos a pacientes con infecciones del sistema nervioso central, desde enero del 2002 al 31 de diciembre del 2006. Se analizaron variables como: edad, sexo, estadía, fecha, manifestaciones clínicas, exámenes utilizados para el diagnóstico, condiciones predisponentes, gérmenes más frecuentes y evolución final. Resultados: la media de edad fue 35,65 años con predominio discreto del sexo femenino y la estadía de 5 días; ocurrieron 22 fallecimientos (6,9 % de letalidad, fundamentalmente por meningoencefelitis bacteriana; la meningoencefalitis linfocitaria fue la más frecuente; el grupo de edad más afectado el de 20 a 29 años. En los meses desde julio hasta octubre tuvo mayor incidencia la meningoencefalitis linfocitaria y de enero a diciembre la bacteriana. Los síntomas y signos más frecuentes fueron: cefalea (92,1 %, fiebre (82,7 %, meningismo (67,6 % y vómitos (37,7 %; el recurso clínico y el estudio del líquido cefalorraquídeo fueron los más empleados para el diagnóstico. Los factores predisponentes fueron neumonía, sinusitis y alcoholismo; el S. pneumoniae resultó el germen aislado con más frecuencia; la E. Coli mostró mayor letalidad. Conclusiones: haber presentado degradación de la conciencia (OR=41,735, lesiones purpúricas (OR=6,641 o padecer de una meningoencefalitis bacteriana (OR=22,958, se asociaron de forma independiente con el riesgo de morir.

  1. Modern concepts of thermodynamic optimization in Mexican thermoelectric stations; Conceptos modernos de optimacion termodinamica en centrales termoelectricas mexicanas

    Energy Technology Data Exchange (ETDEWEB)

    Cervantes-de Gortari, J; Vidal-Santo, A.; Mendez-Lavielle, F.; Bautista-Godinez, O. [Departamento de Termoenergia, from Facultad de Ingenieria UNAM (Mexico)

    2002-03-01

    In this paper, a summary review of the current thermodynamic concepts related to the maximum power generation and minimum entropy production are presented. The results of the analysis are considered in Mexican power stations using conventional cycles and are compared with other power stations around the world. [Spanish] En este trabajo se revisa el analisis de maxima generacion de potencia que implica la minimizacion de la produccion de entropia en centrales generadoras de potencia. De acuerdo con los lineamientos mas recientes publicados en la literatura. Los conceptos y resultados del analisis se aplican a varias centrales mexicanas y se comparan con otras centrales en el mundo.

  2. Modern concepts of thermodynamic optimization in Mexican thermoelectric power stations; Conceptos modernos de optimacion termodinamica en centrales termoelectricas mexicanas

    Energy Technology Data Exchange (ETDEWEB)

    Cervantes de Gortari, J.; Vidal Santo, A.; Mendez Lavielle, F.; Bautista Godinez, O. [Facultad de Ingenieria, UNAM, Mexico, D.F. (Mexico)

    2002-03-01

    In this paper, a summary review of the current thermodynamic concepts to the maximum power generation and minimum entropy production are presented. The results of the analysis are considered in Mexican power stations using conventional cycles and are compared with other power stations around the world. [Spanish] En este trabajo se revisa el analisis de maxima generacion de potencia que implica la minimizacion de la produccion de entropia en centrales generadoras de potencia, de acuerdo con los lineamientos mas recientes publicados en la literatura. Los conceptos y resultados del analisis se aplican a varias centrales mexicanas y se comparan con otras centrales en el mundo.

  3. Kinematics of high-energy nuclear processes; Cinematica de los procesos nucleares de alta energia

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez del Rio, C.

    1972-07-01

    This report is the first draft of one of the chapters of a book being prepared under the title:Topics on Practical Nuclear Physics. It is published as a report because of its immediate educational value and in order to include in its final draft the suggestions of the readers. (Author)

  4. Kinematics of low-energy nuclear processes; Cinematica de los procesos nucleares de baja energia

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez del Rio, C.

    1972-07-01

    This report is the first draft of one of the chapters of a book being prepared under the title: Topics on Practical Nuclear Physics. It is published as a report because of its immediate educational value and in order to include in its final draft the suggestions of the readers. (Author)

  5. Simulation of the steady state of the Laguna Verde Nuclear power station at full power (1931 MWt and 2027 Mwt) with the SCDAPSIM code; Simulacion del estado estacionario de la Central Nucleoelectrica de Laguna Verde a plena potencia (1931 MWt y 2027 MWt) con el codigo SCDAPSIM

    Energy Technology Data Exchange (ETDEWEB)

    Amador G, R.; Nunez C, A.; Mateos, E. del A. [Comision Nacional de Seguridad Nuclear y Salvaguardias, Mexico D.F. (Mexico)

    2001-07-01

    This document describes two models developed for the Laguna Verde Nuclear Power Station (LVNPP) using SCDAPSIM computer code. These models represent the LVNPP in normal operation with a nominal power of 1931 MWt and power uprate conditions of 2027 MWt. The steady states obtained by means of these models comply with the criteria established by the ANSI/ANS-3.5-1985 for nuclear power plant simulators. This criteria has been applied to the models of the LVNPP developed by CNSNS in want of some international accepted criteria for ''Best Estimation'' computer codes. These models will be the bases to carry out studies of validation of the own models as well as the analysis of diverse scenarios that evolve to a severe accident. (Author)

  6. Peritoneal dissemination from central neurocytoma: case report Disseminação peritonial de neurocitoma central: relato de caso

    OpenAIRE

    Maurício Coelho Neto; Ricardo Ramina; Murilo Sousa Meneses; Walter Oleschko Arruda; Jerônimo Buzetti Milano

    2003-01-01

    OBJECTIVE: central neurocytoma is a low grade tumor of neuroglial origin and a relatively new histological entity. Only a few cases have been reported and its biological behavior is still uncertain. Some cases have shown an aggressive behavior (local recurrence, malignant dedifferentiation or CSF dissemination) and challenged the initial view of its relative benignity. A case of central neurocytoma with peritoneal dissemination is presented. CASE: a six years-old boy with recurrent neurocytom...

  7. Host use by Philornis sp. in a passerine community in central Argentina Uso de hospedadores por Philornis sp. en una comunidad de aves paseriformes de la parte central de Argentina

    Directory of Open Access Journals (Sweden)

    Martín A. Quiroga

    2012-03-01

    Full Text Available We studied host use by parasitic botflies (Philornis sp. in a passerine community in central Argentina and analyzed characteristics of nests and hosts associated with botfly parasitism. We conducted a four-year field study as well as a bibliographical survey where we determined: presence of botfly parasitism, type of nest, presence of green material and small sticks in the nest, average height of the nest, date of last nesting attempt during the breeding season and egg volume (as a surrogate of species body mass. Our field study of 3 birds species showed that botflies parasitized Troglodytes aedon (25% of nests, but not Sicalis flaveola and Tachycineta leucorroha in spite of nesting in similar boxes, at the same place and during the same time of the year. However T. aedon built nests using dry material while S. flaveola and T. leucorroha used green material. The analysis of published data (35 species considered showed a negative association between botfly parasitism and presence of green material in the nest, and a positive association between botfly parasitism and presence of small sticks in the nest and date of the last nesting attempt during the breeding season. Our results indicate that the materials used to build the nest and the extent of the breeding season are factors that influence host use by botflies in central Argentina.Analizamos el uso de hospedadores de moscas parásitas del género Philornis en una comunidad de aves paseriformes en la región centro de Argentina, así como las características de nidos y hospedadores asociadas con el parasitismo de Philornis. Se realizó un estudio de campo de 4 años así como una revisión bibliográfica donde determinamos: presencia de parasitismo de Philornis, tipo de nido, presencia de material verde y pequeñas ramas en el nido, altura promedio del nido, fecha del último intento de nidificación y volumen del huevo (como un estimador de la masa corporal de las especies. Los datos de

  8. Neutron-skin effect and centrality dependence of high-$p_{\\mathrm{T}}$ observables in nuclear collisions

    CERN Document Server

    Helenius, Ilkka; Eskola, Kari J

    2016-01-01

    We report on our studies of the neutron-skin effects in high-$p_{\\mathrm{T}}$ observables at the LHC. We study the impact of the neutron-skin effect on the centrality dependence of inclusive direct photon, high-$p_{\\mathrm{T}}$ hadron and $W^{\\pm}$ production in nuclear collisions at the LHC. The neutron-skin effect refers to the observation that in spherical heavy nuclei, the tail of the neutron distribution extends farther than the distribution of protons, which can affect observables sensitive to electroweak phenomena in very peripheral collisions. We quantify this effect for direct photons, charged hadrons and W bosons as a function of the collision centrality. In the case of direct photons we find that it will be difficult to resolve the neutron-skin effect, given the uncertainties in the nuclear PDFs and their spatial dependence. With charged hadrons and W's, however, up to 20~\\% unambiguous effects are expected for most peripheral collisions.

  9. Earthquake-proof plants; Centrales a prueba de terremotos

    Energy Technology Data Exchange (ETDEWEB)

    Francescutti, P.

    2008-07-01

    In the wake of the damage suffered by the Kashiwazaki-Kariwa nuclear power plant as a result of an earthquake last July, this article looks at the seismic risk affecting the Spanish plants and the safety measures in place to prevent it. (Author)

  10. UTILIZAÇÃO DE CATETER VENOSO CENTRAL EM PACIENTES INTERNADOS EM UMA UNIDADE DE TERAPIA INTENSIVA

    Directory of Open Access Journals (Sweden)

    Francisca Jane Gomes de Oliveira

    2013-01-01

    Full Text Available El objetivo fue describir la utilización del catéter venoso central de corta permanencia en Unidad de Cuidados Intensivos cuanto a la inserción, mantenimiento y remoción, e identificar el perfil de pacientes que recibieron el catéter entre junio y diciembre/2012, en hospital privado de Fortaleza-CE, Brasil. Datos fueron recogidos a través de cuestionario con informaciones contenidas en registros médicos de pacientes y observación. Con respecto al tipo de catéter utilizado y sitio de punción del acceso, 76% fueron catéter de doble lumen, 24% de lumen único, de estos, 64% en vena subclavia, 36% en yugular. Entre las razones para la retirada del catéter, 44% fueron por alta hospitalaria, tiempo de catéter (32%. Para el mantenimiento del catéter, es importante educación continua de profesionales, estrategia que cualifica la atención.

  11. Cateter Venoso Central de Inserção Periférica: limites e possibilidades

    Directory of Open Access Journals (Sweden)

    Jaqueline Petry

    2012-12-01

    Full Text Available O presente estudo objetivou identificar limites e possibilidades de expansão do uso do Peripherally Inserted Central Catheters (PICC em unidades neonatais e pediátricas para outras unidades de internação. Trata-se de uma pesquisa exploratório-descritiva de abordagem qualitativa. A coleta de dados ocorreu em agosto e setembro de 2010, por meio de entrevista semiestruturada, com dez enfermeiros de um hospital do Rio Grande do Sul. A análise dos dados resultou em duas categorias: fatores limitadores da expansão do uso do PICC – falta de conhecimento técnico de profissionais de saúde, elevado custo do procedimento, enfrentamento dessa inovação tecnológica e a especificidade desse recurso – e fatores facilitadores para a expansão do PICC – benefícios para o paciente, diminuição do estresse da equipe e a otimização do tempo de trabalho. Conclui-se que a produção de boas evidências sobre o uso do PICC podem auxiliar os profissionais e as instituições utilizarem melhor esse recurso, beneficiando a qualidade da atenção.

  12. Rescate y organización del Archivo Central del Servicio de Retiros y Pensiones de las FFAA

    Directory of Open Access Journals (Sweden)

    Liliana Gargiulo Silvariño

    2013-12-01

    Full Text Available Los fondos documentales militares son los producidos por un órgano o institución militar en el ejercicio de sus funciones. Están integrados por el conjunto de documentos que se conservan orgánicamente desde que se inicia la tramitación hasta su guarda permanente.Este trabajo se centra en una breve descripción del proceso de rescate y organización del Archivo Central del Servicio de Retiros y Pensiones de las Fuerzas Armadas.La muestra catalográfica que se presenta contiene documentación seleccionada del fondo documental del Servicio de Retiros y Pensiones de las Fuerzas Armadas comprendida entre los años 1853 a 1911.

  13. Gestion de l'indépendance et legs soviétique en Asie centrale

    OpenAIRE

    Abašin, Sergej; Allouche, Jérémy; Baubion, Charles; Bourgeot, André; Gossiaux, Jean-François; Hohmann, Sophie; Jacquesson, Svetlana; Jozan, Raphaël; Laruelle, Marlène; Mansurov, Ulugbek; Moscaritolo, Alice; Ohayon, Isabelle; Boris PÉTRIC; Peyrouse, Sébastien; Poujol, Catherine

    2009-01-01

    Dans chacun des États indépendants d’Asie centrale nés de la disparition de l’Union soviétique en 1991, le nouveau discours officiel s’emploie, à des degrés divers, à condamner le régime précédent. Pourtant, les tonitruantes déclarations de changement et de renouveau, tout comme les discours sur l’élaboration d’une voie nationale spécifique de développement, ne doivent pas faire illusion. Si un certain nombre de réformes ont été engagées, la décennie et demie maintenant écoulée est de toute é...

  14. Croatia : Fiscal (De)centralization and Public Service Delivery

    OpenAIRE

    World Bank, (WB)

    2012-01-01

    This report discusses the contours of a possible strategic direction, the necessary basic institutional set up for implementation, and key reform policy options to be tackled in order to complete the foundations of the decentralization reform initiated in 2001. Croatia is still a highly centralized country in terms of decision making on public service financing and delivery, as compared to...

  15. El futur de l'opció nuclear i la sostenibilitat energètica

    OpenAIRE

    Ortega, Javier

    2006-01-01

    S’analitza el sector energètic mundial i la situació actual de l’energia d’origen nuclear al món, per passar a descriure els principis tècnics dels actuals reactors de fissió. S’exposa l’evolució dels sistemes de generació nuclear fins l’actualitat, així com les perspectives que s’obren per al futur amb nous models de reactors de fissió i la possibilitat de la fusió nuclear encara en estudi. Es comenten algunes de les objeccions tradicionals a la indústria nuclear i es presenta l’energia nucl...

  16. Galaxias espirales de núcleos activos: efecto de las barras en la actividad nuclear

    Science.gov (United States)

    Alonso, S.; Coldwell, G.

    In this work we analyze barred active galactic nuclei galaxies (AGN), in order to study the effect produced by the bars on the central black hole activity. We construct a sample of AGN galaxies with bars, classified by visual inspection, from the seventh release of Sloan Digital Sky Survey (SDSS-DR7). In addition, we construct a non-barred AGN galaxy sample with similar redshift distributions, luminosity and mass in stars than barred AGN galaxies. We present preliminary results of the effect of bars on the central nuclear activity, exploring different properties of barred spiral AGN galaxies, compared to its counterpart in non-barred galaxies. FULL TEXT IN SPANISH

  17. Estudio histórico-estratigráfico de los muros de la nave central de la catedral de Teruel y su encuentro con la techumbre

    Directory of Open Access Journals (Sweden)

    de Miguel Alcalá, Berta

    2011-12-01

    Full Text Available Dated to late 12th and early 13th centuries, the Cathedral of Teruel is a complex building whose greatest treasure is the Mudejar roof that covers the central space, declared World Heritage by UNESCO in 1986. There are some basic unknown facts about this roof, such as who built it, how, when or what it represents. There are many theories that attempt to clarify these uncertainties, but there is not much historical documentation available. During the years 2008 and 2009, a restoration of the church was conducted and part of the roof and walls remained uncovered for a short period of time. Using that temporal and unique chance, a wide stratigraphical and building analysis of the central nave walls and their joints with the roof was carried out. Thanks to this work, some important results have been discovered concerning the modifications suffered by the building. At the same time, other evidences help to further going within the knowledge of the form of the church at its earliest stages.Datada entre finales del siglo XII y comienzos del XIII, la Catedral de Teruel es un edificio complejo cuyo destacado tesoro es la techumbre mudéjar que cubre la nave central, declarada Patrimonio Mundial en 1986 por la UNESCO1. De esta magnífica obra de madera policromada se desconocen aspectos tan elementales como quién la construyó, cuándo, cómo y qué representa. Son muchas las teorías que pretenden dilucidar tales incertidumbres y poca la documentación histórica de que se dispone. Durante los años 2008 y 2009, se acometió una restauración que dejó al descubierto parte de la armadura de la cubierta y de los muros que la sustentan. Aprovechando la eliminación temporal de los revestimientos exteriores, se desarrolló un extenso trabajo de análisis estratigráfico y constructivo de los muros de la nave central y de su encuentro con la armadura. Dicho trabajo arroja resultados en torno a las intervenciones llevadas a cabo durante la vida del templo

  18. Association of misoprostol, moebius syndrome and congenital central alveolar hypoventilation: case report Associação de misoprostol, síndrome de Moebius e hipoventilação central congênita: relato de caso

    Directory of Open Access Journals (Sweden)

    MAGDA LAHORGUE NUNES

    1999-03-01

    Full Text Available We report a case showing the association of Moebius syndrome, the use of misoprostol during pregnancy and the development of central congenital alveolar hypoventilation. Pathophysiological aspects of these three diseases are discussed and also the unfavorable prognosis of this association.Descrevemos o caso de um paciente com Síndrome de Moebius associada ao uso de misoprostol durante a gestação. A criança necessitou de suporte ventilatório desde o primeiro dia de vida e evoluiu com quadro de hipoventilação alveolar central congênita, persistindo dependente de ventilação mecânica. São discutidos aspectos fisiopatológicos que poderiam justificar a comorbidade destes três eventos, assim como o prognóstico reservado desta associação.

  19. Una perspectiva geoarqueológica para comprender la ocupación humana en la costa central de la provincia de Buenos Aires

    OpenAIRE

    Verónica Aldazabal; Nilda E. Weiler; Emilio Eugenio

    2004-01-01

    El trabajo plantea los condicionamientos ambientales que sustentan un modelo de colonización humana en la región costera central de la provincia de Buenos Aires a partir del Holoceno medio. Desde el punto de vista geomorfológico, estratigráfico y cronológico se determinó la presencia de líneas de costa con edades entre los 5200 y 2200 AP. Por otro lado, se aportan datos acerca de las características de los suelos, de la vegetación y de posibles recursos para la subsistencia humana a partir de...

  20. Validation of a new version of software for monitoring the core of nuclear power plant of Laguna Verde Unit 2, at the end of Cycle 10; Validacion de una nueva version del software para monitoreo del nucleo de la Central Laguna Verde Unidad 2, al final del Ciclo 10

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez, G.; Calleros, G.; Mata, F. [Comision Federal de Electricidad, Central Nucleoelectrica de Laguna Verde, Carretera Cardel-Nautla Km 42.5, Veracruz (Mexico)], e-mail: gabriel.hernandez05@cfe.gob.mx

    2009-10-15

    This work shows the differences observed in thermal limits established in the technical specifications of operation, among the new software, installed at the end of Cycle 10 of Unit 2 of nuclear power plant of Laguna Verde, and the old software that was installed from the beginning of the cycle. The methodology allowed to validate the new software during the coast down stage, before finishing the cycle, for what could be used as tool during the shutdown of Unit 2 at the end of Cycle 10. (Author)

  1. Variaciones espaciales en las comunidades de corales en la costa sur-central de Cuba.

    OpenAIRE

    Cabrales Caballero, Yenizeys

    2014-01-01

    La investigación se llevó a cabo en Julio del 2011. El objetivo fue determinar la variabilidad espacial y el estado de salud de las comunidades de corales en sitios sometidos a impactos de origen similar, ubicados en el arrecife costero de la provincia de Cienfuegos. Para ello se ubicaron dos estaciones de muestreo en el biotopo de cresta y cuatro en el de camellones. Los indicadores ecológicos seleccionados fueron: diversidad de corales, composición por especies, densidad de corales, de recl...

  2. Central and Eastern United States (CEUS) Seismic Source Characterization (SSC) for Nuclear Facilities Project

    Energy Technology Data Exchange (ETDEWEB)

    Kevin J. Coppersmith; Lawrence A. Salomone; Chris W. Fuller; Laura L. Glaser; Kathryn L. Hanson; Ross D. Hartleb; William R. Lettis; Scott C. Lindvall; Stephen M. McDuffie; Robin K. McGuire; Gerry L. Stirewalt; Gabriel R. Toro; Robert R. Youngs; David L. Slayter; Serkan B. Bozkurt; Randolph J. Cumbest; Valentina Montaldo Falero; Roseanne C. Perman' Allison M. Shumway; Frank H. Syms; Martitia (Tish) P. Tuttle

    2012-01-31

    This report describes a new seismic source characterization (SSC) model for the Central and Eastern United States (CEUS). It will replace the Seismic Hazard Methodology for the Central and Eastern United States, EPRI Report NP-4726 (July 1986) and the Seismic Hazard Characterization of 69 Nuclear Plant Sites East of the Rocky Mountains, Lawrence Livermore National Laboratory Model, (Bernreuter et al., 1989). The objective of the CEUS SSC Project is to develop a new seismic source model for the CEUS using a Senior Seismic Hazard Analysis Committee (SSHAC) Level 3 assessment process. The goal of the SSHAC process is to represent the center, body, and range of technically defensible interpretations of the available data, models, and methods. Input to a probabilistic seismic hazard analysis (PSHA) consists of both seismic source characterization and ground motion characterization. These two components are used to calculate probabilistic hazard results (or seismic hazard curves) at a particular site. This report provides a new seismic source model. Results and Findings The product of this report is a regional CEUS SSC model. This model includes consideration of an updated database, full assessment and incorporation of uncertainties, and the range of diverse technical interpretations from the larger technical community. The SSC model will be widely applicable to the entire CEUS, so this project uses a ground motion model that includes generic variations to allow for a range of representative site conditions (deep soil, shallow soil, hard rock). Hazard and sensitivity calculations were conducted at seven test sites representative of different CEUS hazard environments. Challenges and Objectives The regional CEUS SSC model will be of value to readers who are involved in PSHA work, and who wish to use an updated SSC model. This model is based on a comprehensive and traceable process, in accordance with SSHAC guidelines in NUREG/CR-6372, Recommendations for Probabilistic

  3. Scirrotherium antelucanus,una nueva especie de Pampatheriidae (Mammalia, Xenarthra, Cingulata del Mioceno Superior de Costa Rica, América Central

    Directory of Open Access Journals (Sweden)

    César A Laurito

    2013-12-01

    Full Text Available Se registra por primera vez el género Scirrotherium y se describe una nueva especie para el Hemphilliano temprano de Costa Rica. Este hallazgo constituye una nueva evidencia sobre el arribo temprano de los heraldos sudamericanos a América Central durante el Pre-Gran Intercambio Biótico Americano, incrementando en al menos 3 Ma el registro de la familia Pampatheriidae en el Hemisferio Norte. La nueva especie de América Central difiere de las especies suramericanas de Scirrotherium por tener osteodermos con una ornamentación inconspicua, figura central simple y una muy amplia área superficial.

  4. The Laguna Verde Central by it results in maintenance and operation consolidates it position of world class enterprise; La central Laguna Verde por sus resultados en mantenimiento y operacion consolida su posicion de empresa de clase mundial

    Energy Technology Data Exchange (ETDEWEB)

    Rivera C, A. [CFE, Central Laguna Verde, Km. 42.5 Carretera Cardel- Nautla, Veracruz (Mexico)

    2008-07-01

    This work has the objective of showing the results of the Laguna VerdeCentral in the maintenance and the operation that in the short term the generation of electricity in Mexico by nuclear means is a viable option, in virtue of their positioning like Company of World Class, when winning March 25, 2008 the National Prize of Quality with the more high qualification in the history of this prize, same that allows us to be very optimistic in increasing the possibility to that the Nuclear Industry in Mexico grows. The focus of the comparative graphs, with official data of the Comision Federal de Electricidad (CFE), it is so that it is observed that the Laguna Verde Central is above those the other types of generation like they are the Coal power stations, Thermoelectric, Hydroelectric, likewise they can see that we are for up of the Independent Producers of Energy. The information of the electric power generation is presented by reactors nuclear at world level that is growing, in having 31 Generating Units in the construction process that favors the decisions making in the Government federal, likewise contributed data of the increment projected for 2016 in the country of 380,102 GWh that equivalent to 63% of growth, where it exists without place to doubts a good opportunity for the nucleoelectricity. The Investment Works Program of Public Sector (POISE), it shows the information that 6,178 Mwe will be installed settled of a Non-defined Technology in Mexico, information that specifies the opportunity to be a viable option, because the one Plant Factor, the Production of Electric power, and the Variable Cost of Production, the energy generation by nuclear means is the more competitiveness. Finally this work stood out the effort that communitary works are developed to benefit to the society and the environment to be one Viable option not only for their high performance, or competitive for those more low costs, but also to improve the public opinion with the sustainable

  5. Síndrome de enmascaramiento en un paciente con un linfoma primario del sistema nervioso central

    Directory of Open Access Journals (Sweden)

    J. A. Mazzei

    2003-12-01

    Full Text Available Se describe el caso de un varón de 37 años con un linfoma primario del sistema nervioso central y con múltiples localizaciones supra e infratentoriales. El paciente presentaba manifestaciones de inflamación intraocular como expresión de su neoplasia intracraneana (síndrome de enmascaramiento y linfocitopenia con un recuento disminuido de CD4- como representación de una inmunodeficiencia cuya etiología no logramos identificar. El diagnóstico de linfoma se confirmó a través del estudio citológico del humor vítreo. El paciente falleció 10 meses después del comienzo de los síntomas.We report the case of a 37-year-old, white male with a primary central nervous system lymphoma with multiple supra and infratentorial locations. The patient developed manifestations of intraocular inflammation secondary to the intracranial neoplasm (masquerade syndrome and lymphocytopenia -with a low CD4 cell count- representing an immunodeficiency state which etiology was undiagnosed. The diagnosis of lymphoma was established by vitreous cytology. The patient died 10 months after the beginning of the symptoms.

  6. Glaucoma de pressão normal e espessura corneana central

    Directory of Open Access Journals (Sweden)

    Sakata Kenji

    2002-01-01

    Full Text Available Objetivo: Este estudo tem como objetivo investigar a existência de diferença da espessura corneana central (ECC em pacientes com glaucoma de pressão normal (GPN, glaucoma crônico simples (GCS e pacientes normais (Controle. Métodos: Foram avaliados 113 pacientes dos quais 40 apresentavam GPN, 51 eram normais (Controles e 22 apresentavam GCS. Todos os pacientes foram submetidos a exame oftalmológico completo e tiveram aferidas sua Po (Goldmann e ECC (Topcon SP-2000P. Resultados: A média da espessura corneana central (ECC dos pacientes com GPN foi de 500,95 m (d.p. 28,65 m, o grupo controle teve média de 521,11 m (d.p. de 43,30 m e o grupo de GCS apresentou média de 522,23 m (d.p. de 27,87 m.. O grupo de GPN apresentou uma ECC significativamente menor quando comparado com os grupo controle (p = 0,01 e GCS (p=0,006. Entre os grupos controle e GCS não houve diferença estatística significativa (p = 0,91. Conclusão: Observou-se que numa amostra da população brasileira a ECC dos olhos com GPN é significativamente menor do que a ECC dos pacientes com GCS e do grupo controle.

  7. La sedimentación neógena continental en el sectorextrandino de Argentina central

    Directory of Open Access Journals (Sweden)

    Alicia Folguera

    2009-06-01

    Full Text Available La integración de losdepósitos neógenos en un marco regional pone de manifiesto la gran extensiónareal que tienen estas unidades en el área extrandina. Mediante lacaracterización de las unidades neógenas de la región central de Argentina, sepropone un esquema de correlación de las unidades para enmarcarlas en un modeloevolutivo geológico regional. Surge de este análisis la existencia de dosgrandes ciclos de depositación continental, producidos con posterioridad alretiro del mar paranense, uno en el Mioceno tardío y otro en el Plioceno. Ambosciclos están separados por un importante hiatus depositacional y erosivo, y suscuencas respectivas no coinciden en su extensión areal. De esta manera se proponeque la cuenca de antepaís pliocena se restringe arealmente hacia el sur conrespecto a la miocena tardía.

  8. Estudi topogràfic de la primera central hidroelèctrica de la comarca del Priorat i projecte de re-apertura

    OpenAIRE

    Rabat Bedós, Francesc; Uriarte Latorre, Imanol

    2014-01-01

    Aquest projecte comença amb un aixecament de les restes d’una vella central hidroelèctrica a Torroja del Priorat amb l’objectiu de fer l’estudi de la possible reconstrucció. A finals del segle XIX Torroja del Priorat i els pobles veïns generaven la seva pròpia electricitat mitjançant centrals hidroelèctriques que antigament eren molins de farina. En aquest cas s'ha fet l'estudi del Molí del Marimon, que al introduir la energia elèctrica, va abandonar la seva funció tradicional ...

  9. Arte Rupestre no Alentejo Central: o caso de Arraiolos

    OpenAIRE

    Rocha, Leonor

    2015-01-01

    The rock art of Central Alentejo known became internationally in the early twentieth century, with the work carried out in the Cities of Mora and Arraiolos, by V. Correia (Correia 1921). During the work excavation that was occurring in Pavia, V. Correia made some archaeological sites identification work, including a set of rock art outdoors, municipality of Arraiolos - two granite outcrops, with engravings (essentially anthropomorphic and cruciform) on vertical surfaces. The work carrie...

  10. Fine litter accumulation in Central Amazonian Tropical Rainforest canopy Acúmulo de liteira fina no dossel de uma Floresta Tropical na Amazônia Central

    Directory of Open Access Journals (Sweden)

    Fabiana Rita do Couto-Santos

    2010-12-01

    Full Text Available Fine litter dynamics within the canopy differ from litter dynamics on the forest floor for reasons such as differences in microclimate, substrate, disturbance level, stratum influence and decomposition rates. This study is the first attempt to quantify the fine litter accumulated in the canopy of Central Amazonian forests. We compared the canopy litter accumulation to fine litter-layer on forest floor and to other forests and also investigated which were the mostly accumulated litter omponents. We found that Central Amazonian Rainforest intercepts greater fine litter in the canopy (294 g.m-2 compared to other forest formations with higher winds speed as in a Costa Rican Cloud Forest (170 g.m-2. The mean canopy fine litter accumulated at the end of the dry season was less than a half of that on soil surface (833 g.m-2 and the fine wood component dominates the canopy samplings (174 g.m-2 while leafy component predominate on soil surface litter (353 g.m-2.A dinâmica da liteira fina no dossel difere da dinâmica no chão da floresta por razões como diferenças no microclima, tipo de substrato, taxas de decomposição, distúrbios e influência dos estratos. Esta é a primeira tentativa de quantificar a liteira fina acumulada no dossel das florestas da Amazônia Central. Comparamos o acúmulo da liteira no dossel com a camada de liteira do chão da floresta e com outros tipos de florestas e investigamos quais componentes da liteira acumularam em maiores quantidades. A floresta estudada na Amazônia Central interceptou uma maior quantidade de liteira no dossel (294 g.m-2 do que outras florestas com maior influência dos ventos, como na Costa Rica (170 g.m-2. A média de liteira no dossel no fim da estação seca foi menos da metade da acumulada sobre o solo (833 g.m-2. Os galhos finos dominaram nas amostras do dossel (174 g.m-2 enquanto as folhas predominaram na liteira sobre o solo (353 g.m-2.

  11. The Vale de Abrutiga uranium phosphates mine, central Portugal

    OpenAIRE

    Pinto, Marina M. S. Cabral; Silva, Maria M. V. G.

    2007-01-01

    A brief summary about the composition and origins of the U deposit is present. The mineralization is composed by secondary uranium phosphates (saleeite and meta-saleeite). The precipitation was probably the main responsible factor for U retention within the quartz veins leading to the uranium phosphate mineralization of Vale de Abrutiga.

  12. Dieta del pez espada Xiphias gladius Linnaeus, 1758, en aguas oceánicas de Chile central en invierno de 2003 Diet of the swordfish Xiphias gladius Linnaeus, 1758 in oceanic waters off central Chile in winter 2003

    OpenAIRE

    Christian M Ibáñez; Carlos González; Luis Cubillos

    2004-01-01

    Se analiza la dieta del pez espada en tres zonas de pesca en aguas oceánicas de Chile central durante el invierno de 2003, considerando como hipótesis que el tamaño de las presas se incrementa significativamente con el tamaño del depredador, conjuntamente con una disminución del número de presas. El estudio se realizó sobre la base de 48 estómagos de Xiphias gladius con contenido estomacal. Para su análisis se utilizó los descriptores cuantitativos de frecuencia de ocurrencia y método numéric...

  13. Unconventional Gas Resources in the Paleozoic of Central Europe Ressources de gaz non conventionnels dans le Paléozoïque de l’Europe Centrale

    Directory of Open Access Journals (Sweden)

    Littke R.

    2011-05-01

    Full Text Available Whereas gas production from unconventional reserves has greatly increased over the past decades, there is still a largely unexplored potential in the Paleozoic of Central Europe. For this area, the paper summarizes some important aspects of the geology of tight sandstone gas reservoirs, gas shales and coalbed methane. Tight sandstones with low permeabilities are especially present in the Permian (Rotliegend Formation of The Netherlands and northern Germany, but also in the underlying Carboniferous. There is already active production from some of these reservoirs. Further development greatly depends on understanding of gas charge as well as the regional distribution of porosity and permeability which in turn depend on facies and diagenesis. In contrast exploration for gas shales is just at the very beginning. Whereas Mesozoic shales in the southern Lower Saxony Basin have to be regarded as prime targets due to thickness, maturity and organic matter content, there are additional targets in the Mississippian, but also in older rocks. Currently an international gas shale research programme (Gas shales in Europe, GASH gathers relevant data for these units. Coalbed methane exploration started already about 20 years ago in the Ruhr Basin, but was not successful at that time due to small flow rates. On the other hand, production from abandoned coal mines provided substantial amounts of gas. Due to the abundance of coal seams and the suitable maturity conditions and gas contents, there is a high potential for future substantial coalbed methane in the area. Alors que l’extraction du gaz naturel des gisements non conventionnels a fortement augmenté ces dernières dizaines d’années, un large potentiel de ressources reste inexploré dans les couches paléozoïques de l’Europe Centrale. Cet article présente, pour cette région, quelques aspects importants de la géologie des grès de faible perméabilité (tight gas sands, des gaz de schiste (gas

  14. A high resolution record of chlorine-36 nuclear-weapons-tests fallout from Central Asia

    Science.gov (United States)

    Green, J.R.; Cecil, L.D.; Synal, H.-A.; Santos, J.; Kreutz, K.J.; Wake, C.P.

    2004-01-01

    The Inilchek Glacier, located in the Tien Shan Mountains, central Asia, is unique among mid-latitude glaciers because of its relatively large average annual accumulation. In July 2000, two ice cores of 162 and 167 meters (m) in length were collected from the Inilchek Glacier for (chlorine-36) 36Cl analysis a part of a collaborative international effort to study the environmental changes archived in mid-latitude glaciers worldwide. The average annual precipitation at the collection site was calculated to be 1.6 m. In contrast, the reported average annual accumulations at the high-latitude Dye-3 glacial site, Greenland, the mid-latitude Guliya Ice Cap, China, and the mid-latitude Upper Fremont Glacier, Wyoming, USA, were 0.52, 0.16 and 0.76 m, respectively. The resolution of the 36Cl record in one of the Inilchek ice cores was from 2 to 10 times higher than the resolution of the records at these other sites and could provide an opportunity for detailed study of environmental changes that have occurred over the past 150 years. Despite the differences in accumulation among these various glacial sites, the 36Cl profile and peak concentrations for the Inilchek ice core were remarkably similar in shape and magnitude to those for ice cores from these other sites. The 36Cl peak concentration from 1958, the year during the mid-1900s nuclear-weapons-tests period when 36Cl fallout was largest, was preserved in the Inilchek core at a depth of 90.56 m below the surface of the glacier (74.14-m-depth water equivalent) at a concentration of 7.7 ?? 105 atoms of 36Cl/gram (g) of ice. Peak 36Cl concentrations from Dye-3, Guliya and the Upper Fremont glacial sites were 7.1 ?? 105, 5.4 ?? 105 and 0.7 ?? 105 atoms of 36Cl/g of ice, respectively. Measurements of 36Cl preserved in ice cores improve estimates of historical worldwide atmospheric deposition of this isotope and allow the sources of 36Cl in ground water to be better identified. ?? 2004 Published by Elsevier B.V.

  15. Organización de la explotación en maquinas de pivote central eléctricas para el riego del cultivo de la papa

    Directory of Open Access Journals (Sweden)

    Lorenzo E. Camejo B.

    2009-01-01

    Full Text Available Se realizó el trabajo para la organización de la explotación de las máquinas de riego de pivote central Western5 en el cultivo de la papa (solanum tuberosum en la provincia Ciego de Ávila, teniéndose en consideración el tipo de suelo, sus propiedades hidrofísicas, fases de desarrollo del cultivo, exigencias hídricas y regulaciones de la máquina, lo que conlleva a obtener las normas de riego, intervalos de riego y regulaciones para cada fase de desarrollo del cultivo; aplicándose en todas las máquinas de riego de papas en la provincia, capacitando además a todos los operadores y técnicos en la explotación y regulación de la máquina por fases de desarrollo del cultivo. Los resultados obtenidos muestran un considerable ahorro de agua y energía en la campaña de riego, obteniéndose rendimientos entre 28-32 t/ha.

  16. Características de uso de plaguicidas químicos y riesgos para la salud en agricultores de la sierra central del Perú

    OpenAIRE

    Ymelda Montoro; Rocío Moreno; Luis Gomero; Maria Reyes

    2009-01-01

    Con el objetivo de conocer las características sobre el uso e impactos en la salud de los plaguicidas químicos de uso agrícola en las provincias de Chupaca y Concepción en los andes centrales del Perú, se desarrolló un estudio descriptivo transversal entre abril y junio del año 2005, por medio de un cuestionario aplicado a 435 agricultores. Asimismo, se exploró la ubicación de los centros de expendio y la frecuencia de ventas de productos, además, se evaluó los casos de intoxicación reportado...

  17. Direct reading spectrochemical analysis of nuclear graphite; Analisis espectroquimico de lectura directa de grafito nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Roca Adell, M.; Becerro Ruiz, E.; Alvarez Gonzalez, F.

    1964-07-01

    A description is given about the application of a direct-reading spectrometer the Quantometer, to the determination of boron. calcium, iron, titanium and vanadium in nuclear grade graphite. for boron the powdered sample is mixed with 1% cupric fluoride and excited in a 10-amperes direct current arc and graphite electrodes with a crater 7 mm wide and 10 mm deep. For the other elements a smaller crater has been used and dilution with a number of matrices has been investigated; the best results are achieved by employing 25% cupric fluoride. The sensitivity limit for boron is 0,15 ppm. (Author) 21 refs.

  18. Aplicación de modelos en los sistemas agrícolas de secano de la meseta central : Simulación de rotaciones y modelado de la arquitectura de la planta en leguminosas

    OpenAIRE

    Hernández Díaz-Ambrona, Carlos Gregorio

    1999-01-01

    Este trabajo profundiza en el estudio de los sistemas agrícolas de secano de la Meseta Central. Sobre la base de la alternativa tradicional ce^eal^arbecho, se han estudiado durante tres años de cultivo 1995/96, 1996/97 y 1997/98 seis rotaciones diferentes: monocultivo de cebada (Hordeum vulgare L.), cebada/barbecho, cebada/habas (Viciafaba L.), cebada/guisantes {Pisum sativum L.), cebada/habas/barbecho y cebada/guisantes/barbecho. Entre las rotaciones, se ha comparado la biomasa, el rendimien...

  19. Tumores del estroma gastrointestinal (GIST: serie del Hospital Central de la Defensa Gómez Ulla

    Directory of Open Access Journals (Sweden)

    I. Bodega Quiroga

    2013-09-01

    Full Text Available Objetivo: Los tumores del estroma gastrointestinal (GIST se han diferenciado hace poco más de una década de los tumores de músculo liso y de origen neural gracias a métodos de identificación inmunohistoquímica (CD117. Al mismo tiempo, la introducción del Mesylato de Imatinib, fármaco empleado en el tratamiento de la leucemia mieloide crónica (LMC, ha mejorado la expectativa de vida, no sólo en GIST irresecables o metastáticos, sino también para aquéllos de intermedio o alto grado de malignidad como terapia adyuvante e incluso se plantea como tratamiento neoadyuvante. El objetivo de esta comunicación es estudiar los GIST diagnosticados e intervenidos quirúrgicamente en el Servicio de Cirugía General y del Aparato Digestivo del Hospital Central de la Defensa «Gómez Ulla» (Madrid en un periodo de 9 años y realizar una revisión de la literatura enfocada fundamentalmente a los avances en el tratamiento. Material y métodos: Estudio retrospectivo observacional de los pacientes diagnosticados de GIST e intervenidos quirúrgicamente en nuestro Servicio de 2003 a 2012. Se estudia el motivo de consulta inicial, la localización, el grado histológico y el tipo de intervención quirúrgica realizado. Resultados: Se encontraron 11 pacientes entre Noviembre de 2003 y Abril de 2012, todos hombres. La edad media fue de 65´17 años (rango, 53-84. Hay que destacar que en 8 casos (72´7 % el hallazgo fue incidental, sin ninguna sintomatología previa. La localización más frecuente fue el estómago en 6 casos (54´5%, y en el intestino delgado en 5 (45´5%. En cuanto al riesgo de malignidad, 5 casos (45´5% fueron de bajo grado, 4 (36´4% de grado intermedio, 1 (9% de muy bajo grado y 1 (9´1% de alto grado de malignidad. La técnica quirúrgica empleada fue la gastrectomía parcial en 6 casos (54´5% seguida de la resección intestinal segmentaria en 5 casos (45´5%. Conclusiones: La incidencia anual de tumores GIST intervenidos en nuestro

  20. Caracterización de la zona de alteración Central II, Bloque San Rafael, provincia de Mendoza Characteristics of Central II alteration zone, San Rafael Massif, province of Mendoza

    OpenAIRE

    M.F. Gargiulo; N. Rubinstein; F. Carpio; J. Salvarredi

    2007-01-01

    Se presenta el estudio petrográfico de las muestras de superficie correspondientes a la zona de alteración Central II, localizada en el Bloque San Rafael, provincia de Mendoza (34°54'56" S; 68°37'02" O). La misma está relacionada a la intrusión de un cuerpo hipabisal de composición riolítica alojado en una sucesión de rocas volcánicas y volcaniclásticas de la sección superior del Grupo Choiyoi. La zona de alteración está representada por sericitización generalizada a la que se sobreimponen br...

  1. A prototype system dynamic model of nuclear and radiological export controls in Central Asia and the Caucasus; enhancing the effectiveness of preventing illicit nuclear material trafficking

    International Nuclear Information System (INIS)

    An urgent need calls out for improved border security and export control systems in the Central Asian and Caucasus regions to prevent illicit nuclear and radioactive materials trafficking. Effective nuclear and radiological exports controls are essential because these regions contain numerous nuclear facilities and radioactive materials as well as lie at the crossroads between seekers and suppliers of technologies that could be employed in nuclear and radiological weapons. Porous and unprotected borders compound these concerns. Moreover, the states within these regions are struggling with forming new regulations and laws, obtaining sufficient portal monitoring equipment, training customs and border security personnel, and coordinating these activities with neighboring states. Building this infrastructure all at once can severely task any government. Thus, unsurprisingly, most of these states have inadequate export control and border security systems. To enable each state in these regions determine how to better prevent illicit nuclear and radiological materials trafficking, the authors have developed a prototype system dynamics model focused on evaluating and improving of effectiveness of export controls. System dynamics modeling, a management tool that grew out of the field of system engineering and nonlinear dynamics, uses two structures: causal loop diagrams and stock and flow diagrams. The former shows how endogenous systematic factors interact with each other to produce feedback mechanisms that results in either balancing or reinforcing loops. A classic example is a arms race, modeled as a vicious cycle or reinforcing loop. In addition to interacting with each other, causal loops influence the flow of stock, which is material concern. In the export control system dynamics model, the stock represents nuclear and radioactive materials. System dynamics modelling is an iterative process that is continually modified by user input. Therefore, export control

  2. Molecular species identification of Central European ground beetles (Coleoptera: Carabidae using nuclear rDNA expansion segments and DNA barcodes

    Directory of Open Access Journals (Sweden)

    Raupach Michael J

    2010-09-01

    Full Text Available Abstract Background The identification of vast numbers of unknown organisms using DNA sequences becomes more and more important in ecological and biodiversity studies. In this context, a fragment of the mitochondrial cytochrome c oxidase I (COI gene has been proposed as standard DNA barcoding marker for the identification of organisms. Limitations of the COI barcoding approach can arise from its single-locus identification system, the effect of introgression events, incomplete lineage sorting, numts, heteroplasmy and maternal inheritance of intracellular endosymbionts. Consequently, the analysis of a supplementary nuclear marker system could be advantageous. Results We tested the effectiveness of the COI barcoding region and of three nuclear ribosomal expansion segments in discriminating ground beetles of Central Europe, a diverse and well-studied invertebrate taxon. As nuclear markers we determined the 18S rDNA: V4, 18S rDNA: V7 and 28S rDNA: D3 expansion segments for 344 specimens of 75 species. Seventy-three species (97% of the analysed species could be accurately identified using COI, while the combined approach of all three nuclear markers provided resolution among 71 (95% of the studied Carabidae. Conclusion Our results confirm that the analysed nuclear ribosomal expansion segments in combination constitute a valuable and efficient supplement for classical DNA barcoding to avoid potential pitfalls when only mitochondrial data are being used. We also demonstrate the high potential of COI barcodes for the identification of even closely related carabid species.

  3. Diseño y análisis de una planta termosolar de torre central con configuraciones de único o doble receptor operando con sales fundidas

    OpenAIRE

    Heras Martín, Jorge

    2012-01-01

    La energía termosolar se presenta como una fuente de energía sostenible y que contribuye a la protección del medio ambiente. Teniendo en cuenta la gran cantidad de radiación que recibe España, éste país se convierte en una gran potencia para la construcción de centrales termosolares. Sin embargo, la construcción de este tipo de centrales presenta grandes desafíos tecnológicos que han de resolverse para conseguir su plena incorporación al mercado de producción eléctrica. En el presente proyect...

  4. Elecnuc. Nuclear power plants in the world; Elecnuc. Les centrales nucleaires dans le monde

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This small booklet summarizes in tables all the numerical data relative to the nuclear power plants worldwide. These data come from the French CEA/DSE/SEE Elecnuc database. The following aspects are reviewed: 1999 highlights; main characteristics of the reactor types in operation, under construction or on order; map of the French nuclear power plants; worldwide status of nuclear power plants at the end of 1999; nuclear power plants in operation, under construction and on order; capacity of nuclear power plants in operation; net and gross capacity of nuclear power plants on the grid and in commercial operation; grid connection forecasts; world electric power market; electronuclear owners and share holders in EU, capacity and load factor; first power generation of nuclear origin per country, achieved or expected; performance indicator of PWR units in France; worldwide trend of the power generation indicator; 1999 gross load factor by operator; nuclear power plants in operation, under construction, on order, planned, cancelled, shutdown, and exported; planning of steam generators replacement; MOX fuel program for plutonium recycling. (J.S.)

  5. US central station nuclear electric generating units: significant milestones (status as of July 1, 1980)

    International Nuclear Information System (INIS)

    The status of 189 US nuclear power plants is reported in a table which gives the name, owner, capacity, type, NSSS architect and contractor and data of public announcement, NSSS order, licensing, and initial operation. The plants are also indexed according to state, region, utility, and alphabetical name. The utility nuclear steam supply system orders are also listed

  6. Plan de contratación y ejecución de un almacén temporal de residuos nucleares

    OpenAIRE

    Serrano Martín, Pedro

    2009-01-01

    El Proyecto tiene un carácter introspectivo y se desarrolla desde unas generalidades introductorias encaminadas a su comprensión hasta llegar a la esencia del proyecto: el Plan de Contratación y Ejecución del ATC. Se comienza abordando el tema de la energía nuclear en España, desde un punto de vista sectorial, particularizando el tema de la gestión de los residuos nucleares realizado en nuestro país. Posteriormente se habla de la empresa donde se ha elaborado este proyecto, ENRESA, y de su...

  7. LA INFLACIÓN Y EL BANCO CENTRAL: ECONOMÍA DE UN EMISOR INDEPENDIENTE

    Directory of Open Access Journals (Sweden)

    Carlos Esteban Posada P

    Full Text Available En este artículo formulo una relación teórica de fundamento microeconómico entre un Banco privado monopólico y la tasa óptima de inflación. La relación propuesta es la base para establecer una condición suficiente para la independencia de la Banca Central. La parte central del artículo lo consti tuye un modelo que expone las condiciones que se requieren para igualar las tasas óptimas, social y privada, de la inflación. A pesar de la sencillez del argumento, se pueden deducir algunas proposiciones de "Economía Constitucional".In this paper I propose a microeconomic based theoretical relation between a private monopolist bank and the optimal intlation rateo The proposed relation is the basis to establish a sutficient condition for the central bank independence. The core of this paper is a model showing the conditions required to equalize the optimal social and private rates of inflation. Notwithstanding the very simple nature of the argument, we can deduce from it some propositions of "Constitutional Economics".

  8. Determinación de procesos y áreas de riesgos en los Andes centrales de Chile mediterráneo: Casos de estudio

    Directory of Open Access Journals (Sweden)

    Quintanilla, Víctor

    1994-12-01

    Full Text Available ln the course of the Mountain Hazards Mapping Project in the Central Andes from Chile (Project FONDECYT Nº 482-91 natural hazards were assessed and mapped in the Aconcagua Bassin Test area of the high Andes (2.500 to 4.000 m.. Various geomorphic hazard processes (avalanches, rockfalls, landslide hazards, water activity were mapped on the scale 1:50.000 with a simplified legend. The mountainous area seems to be relatively stable and the rock substratum (mainly granitic is resistant to weathering. The greatest hazards are avalanches and landslides, which have a long recurrence interval and are difficult to predict, although their source areas can be identified.

    [es] Durante la realización del proyecto de Cartografía de Riesgos de Montaña en los Andes Centrales de Chile (Proyecto FONDECYT nº 482- 91 se cartografiaron los riesgos naturales en la cuenca del Aconcagua, altos Andes (2.500 a 4.000 m. Varios riesgos geomorfológicos (avalanchas, caídas de piedras, erosión hídrica fueron cartografiados a escala 1:50.000 con una leyenda simplificada. Las áreas de montaña parecen relativamente estables y el sustrato rocoso (principalmente granítico es resistente a la meteorización.
    Los mayores riesgos son las avalanchas y los deslizamientos, que tienen un largo periodo de recurrencia y son difíciles de predecir, aunque sus áreas fuente pueden ser fácilmente identificadas.
    [fr] Durant la réalisation du projet de cartographie des risques de montagne dans les Andes Centrales du Chili (Projet FONDECYT nº 482-91 on a réalisé des cartographies des risques naturels dans le bassin de Aconcagua, Hautes Andes (2500 à 4000 m. Des risques géomorphologiques variés (avalanches, chutes de pierres, érosion hydrique ont été représentés au 1:50.000ième avec une légende simplifiée. Les zones de montagne paraissent relativement stables et la roche mère (principalement granitique est résistante à la d

  9. Estudio técnico-económico de una central híbrida solar-ciclo combinado (ISCC)

    OpenAIRE

    Hidalgo Cebrián, Lucía

    2012-01-01

    El objetivo de este proyecto es estudiar la viabilidad de una central híbrida solar-ciclo combinado (ISCC) en Argelia. La planta consiste en un ciclo combinado basado en dos turbinas de gas de 42 MW cada una y una turbina de vapor de 60 MW de los cuales 20 MW se deben al campo solar, siendo la potencia eléctrica de la planta 144 MW. El campo solar se ha dimensionado para obtener una contribución solar del 5% sobre la producción eléctrica anual de la instalación. La tecnología solar utilizada ...

  10. Progresividad de los efectos del glutamato en el sistema nervioso central: Aspectos experimentales y clínicos

    OpenAIRE

    Rodríguez Allué, Manuel José

    2000-01-01

    [spa] DE LA TESIS: Una de las consecuencias de los avances científicos y tecnológicos del ultimo siglo es el aumento de esperanza de vida en las sociedades modernas lo que, en términos demográficos, se traduce en un incremento en la media de edad de la población. Sin embargo, este envejecimiento progresivo comporta una mayor incidencia en la sociedad de enfermedades que se manifiestan a edades avanzadas, destacando las que afectan al sistema nervioso central como la enfermedad de Alzheimer o ...

  11. Huella hídrica de productos agrícolas producidos en la sierra central y comercializados en Lima

    OpenAIRE

    Tito Mallma Capcha; Jesús Mejía Marcacuzco

    2015-01-01

    El objetivo ha sido determinar un modelo para obtener la huella hídrica de los principales productos agrícolas de la sierra central del Perú que son comercializados en los mercados de la ciudad de Lima, para ello se desarrolló un modelo conceptual que determine el requerimiento de agua de los cultivos que junto a los respectivos rendimientos han permitido establecer el contenido de agua virtual de cada producto agrícola expresado en l/kg; con este resultado y la cantidad de producto comercial...

  12. Motivos de consulta de los inmigrante s en el primer nivel de atención de la CCSS, Distrito Primero del Cantón Central de Alajuela durante 2002

    Directory of Open Access Journals (Sweden)

    Manrique Leal-Mateos

    2004-03-01

    Full Text Available Objetivo: Describir los motivos de consulta de los inmigrantes que asistieron a los servicios de salud del primer nivel de atención del distrito primero del cantón Central de Alajuela pertenecientes al área de salud de Alajuela Norte, durante 2002. Métodos: Se trata de un estudio descriptivo de corte transversal. Se recogieron las siguientes variables: edad, sexo, nacionalidad, sede de EBAIS donde que se consultó y motivo de la consulta. Resultados: Se registraron 1076 consultas de inmigrantes, correspondientes a 467 personas extranjeras. Del total de consultas, 853 (79.3% se otorgaron a mujeres. El promedio por paciente fué de 2.3 consultas y la edad media, de 39.8 años. Respecto a la nacionalidad, 772 (71.7% consultas se realizaron a pacientes nicaragüenses, 140 (13% colombianos y 41 (3.8% salvadoreños. Los tres diagnósticos o motivos de consulta que mayor demanda de servicios de salud registraron fueron: control de patología o exámenes de laboratorio, infecciones de vías respiratorias superiores e infecciones del tracto urinario. El EBAIS que atendió a más inmigrantes fue Cristo Rey con 241 consultas (22,4%. Conclusiones: Los pacientes inmigrantes que asisten a los servicios de salud del primer nivel de atención del Distrito Primero del Cantón Central de Alajuela pertenecientes al Área de Salud de Alajuela Norte, durante 2002, son jóvenes, predominantemente de sexo femenino.

  13. A utilização da lavadora de louça industrial: uma alternativa para a central de material e esterilização

    Directory of Open Access Journals (Sweden)

    Yukie Yokoyama

    1994-03-01

    Full Text Available Neste estudo as autoras relatam a experiência desenvolvida na Central de Material e Esterilização de um hospital de grande porte da cidade de São Paulo, na utilização de uma máquina lavadora de louça de uso industrial, readaptada com temperatura ideal para o processo de lavagem de instrumental. O estudo apresenta uma forma alternativa de trabalho com diminuição do tempo para operacionalização do serviço e menor exposição do pessoal aos resíduos orgânicos.

  14. Modelación y análisis probabilístico del balance hídrico superficial de un sistema de riego en Chile Central

    OpenAIRE

    Molina, José Manuel; Gurovich R., Luis A.; Varas, Eduardo

    2003-01-01

    El presente artículo presenta una propuesta de modelación de los elementos y procesos involucrados en la oferta superficial y demanda hídrica de un sistema de riego de la zona central de Chile, como metodología para el estudio del balance hídrico predial en la planificación de los recursos hídricos disponibles. El estudio contempló una descripción y evaluación general del sistema mediante visitas de terreno y recolección de información, teniendo en cuenta aspectos de suelos, cultivos, agua...

  15. Estudio del estado de los Puentes en la Carretera Central en su travesía por la provincia de Matanzas.

    OpenAIRE

    Yordanis Cuba Cepero; Luis R. González Arestuche

    2012-01-01

    La Carretera Central es considerada una de las Siete Maravillas de la Ingeniería Civil en Cuba, según selección realizada en 1997 por la Unión Nacional de Arquitectos e Ingenieros de la Construcción de Cuba-UNAICC. Con el paso de los años, estudiosos de esa obra refuerzan su criterio de que fue el primer megaproyecto realizado en Cuba, por la complejidad de su ejecución y porque atravesó la isla por su centro. Considerando que uno de los territorios atravesados por esta importante vía, es la ...

  16. Fenologia de Cornops aquaticum (Orthoptera: Acrididae associado a Eichhornia crassipes (Pontederiaceae em um Lago de Várzea na Amazônia Central, Brasil

    Directory of Open Access Journals (Sweden)

    Carlos Elias BRAGA

    2011-01-01

    Full Text Available La tucura Neotropical, Cornops aquaticum (Bruner, vive asociada a las macrófitas de la familia Pontederiaceae, de las cuales se alimenta. En los lagos de la Amazonia Central, Eichhornia crassipes (Mart. Solms (camalote o aguape constituye la planta huésped más importante de esta tucura. El objetivo de este trabajo fue estudiar la fenología de los adultos y las ninfas de C. aquaticum en los camalotales de E. crassipes, en relación al régimen hidrológico de la Amazonia Central. Los muestreos se realizaron entre los meses de abril de 2006 a agosto de 2007, en el Lago Camaleón (03o17’05”S 60o11’11”O en la Várzea de la Amazonia Central. Los individuos fueron capturados desde una embarcación a motor, utilizando una red entomológica de 70 cm de diámetro. Durante este estudio, se capturaron un total de 850 ejemplares (296 adultos y 554 ninfas. Se observó que la abundancia y la biomasa de los adultos y de las ninfas de C. aquaticum, así como la planta huésped, están estrechamente relacionados con la oscilación estacional del nivel del río (pulso de inundación.

  17. Características de uso de plaguicidas químicos y riesgos para la salud en agricultores de la sierra central del Perú

    Directory of Open Access Journals (Sweden)

    Ymelda Montoro

    2009-10-01

    Full Text Available Con el objetivo de conocer las características sobre el uso e impactos en la salud de los plaguicidas químicos de uso agrícola en las provincias de Chupaca y Concepción en los andes centrales del Perú, se desarrolló un estudio descriptivo transversal entre abril y junio del año 2005, por medio de un cuestionario aplicado a 435 agricultores. Asimismo, se exploró la ubicación de los centros de expendio y la frecuencia de ventas de productos, además, se evaluó los casos de intoxicación reportados en ambas provincias. Los agricultores no cuentan con ropa de protección y manipulan directamente los plaguicidas durante su preparación y aplicación; asimismo, muchas veces no toman medidas preventivas a pesar de conocer los riesgos relacionados. El comercio de los plaguicidas se ubica en los centros urbanos, cerca de restaurantes y tiendas de abarrotes, además, los plaguicidas más vendidos pertenecen a las categorías extremadamente y altamente peligrosos, tales como Tamaron® y Furadan®, esto representa un peligro para la salud de los agricultores. Los casos de intoxicación por estos productos en las provincias bajo estudio, se han incrementado entre los años 2001 a 2004.

  18. Serpent: an alternative for the nuclear fuel cells analysis of a BWR; SERPENT: una alternativa para el analisis de celdas de combustible nuclear de un BWR

    Energy Technology Data Exchange (ETDEWEB)

    Silva A, L.; Del Valle G, E. [IPN, Escuela Superior de Fisica y Matematicas, Av. Instituto Politecnico Nacional s/n, U.P. Adolfo Lopez Mateos, Edificio 9, Col. San Pedro Zacatenco, 07738 Mexico D. F. (Mexico); Gomez T, A. M., E-mail: lidi.s.albarran@gmail.com [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2013-10-15

    In the last ten years the diverse research groups in nuclear engineering of the Universidad Nacional Autonoma de Mexico and Instituto Politecnico Nacional (UNAM, IPN), as of research (Instituto Nacional de Investigaciones Nucleares, ININ) as well as the personnel of the Nuclear Plant Management of the Comision Federal de Electricidad have been using the codes Helios and /or CASMO-4 in the generation of cross sections (X S) of nuclear fuel cells of the cores corresponding to the Units 1 and 2 of the nuclear power plant of Laguna Verde. Both codes belong to the Studsvik-Scandpower Company who receives the payment for the use and their respective maintenance. In recent years, the code Serpent appears among the nuclear community distributed by the OECD/Nea which does not has cost neither in its use neither in its maintenance. The code is based on the Monte Carlo method and makes use of the processing in parallel. In the Escuela Superior de Fisica y Matematicas of the IPN, the personnel has accumulated certain experience in the use of Serpent under the direction of personal of the ININ; of this experience have been obtained for diverse fuel burned, the infinite multiplication factor for three cells of nuclear fuel, without control bar and with control bar for a known thermodynamic state fixed by: a) the fuel temperature (T{sub f}), b) the moderator temperature (T{sub m}) and c) the vacuums fraction (α). Although was not realized any comparison with the X S that the codes Helios and CASMO-4 generate, the results obtained for the infinite multiplication factor show the prospective tendencies with regard to the fuel burned so much in the case in that is not present the control bar like when it is. The results are encouraging and motivate to the study group to continue with the X S generation of a core in order to build the respective library of nuclear data as a following step and this can be used for the codes PARCS, of USA NRC, DYN3D of HZDR, or others developed locally

  19. Análisis del proceso de descentralización fiscal: el caso de las finanzas públicas del gobierno central de Cundinamarca

    Directory of Open Access Journals (Sweden)

    Manuel Bernal Garzón

    2016-04-01

    Full Text Available Este artículo presenta un análisis del proceso de descentralización fiscal en Colombia, a la luz de las finanzas públicas de la administración central del gobierno departamental de Cundinamarca. Se estudia cómo se ha profundizado y perfeccionado el proceso de descentralización mediante unas transferencias automáticas de recursos de la nación a los entes territoriales, de una legislación encaminada a fortalecerlos fiscos locales, y de unos sistemas de créditoy cofinanciación que buscan imprimir cada vez más una mayor disciplina y responsabilidad en el momento de ejecutar el gasto. Se analiza el impacto que ha tenido el proceso de descentralización sobre las finanzas públicas del gobierno central del departamento de Cundinamarca y cómo han evolucionado sus ingresos y gastos.

  20. Trombose de veia central da retina bilateral associada à síndrome de hiperviscosidade sanguínea: relato de caso Bilateral central retinal vein occlusion associated with blood hyperviscosity syndrome: case report

    Directory of Open Access Journals (Sweden)

    John Helal Jr

    2005-02-01

    Full Text Available Relato de caso de um paciente masculino de 16 anos de idade com queixa inicial de baixa da acuidade visual e que no exame oftalmológico foi encontrado edema de papila bilateral, que evoluiu para trombose da veia central da retina em ambos os olhos. Na investigação laboratorial, foi feito diagnóstico de um mieloma múltiplo tipo IgA que cursava com síndrome de hiperviscosidade sanguínea, o que explicava o quadro oftalmológico. Após tratamento específico, o paciente apresentou melhora tanto da acuidade visual quanto do aspecto fundoscópico. O achado de oclusão de veia central da retina bilateral pode levar ao diagnóstico de importantes doenças sistêmicas. os achados fundoscópicos podem servir de parâmetro na avaliação do tratamento.The authors report the case of a 16-year-old male patient who presented with blurred vision and bilateral optic disc edema, then developing bilateral central retinal vein occlusion. On laboratory work-up, he was found to have multiple myeloma IgA along with hyperviscosity syndrome, which led to the ophthalmological features. After proper treatment, the patient recovered visual acuity and normalized his eye fundus changes. Bilateral central retinal vein occlusion finding may yield the diagnosis of major systemic diseases. Fundoscopic features may serve as parameters on treatment evaluation.

  1. Whole study of nuclear matter collective motion in central collisions of heavy ions of the FOPI detector

    International Nuclear Information System (INIS)

    In this work we study the collective phenomena in the central collisions of heavy ions for the Au + Au, Xe + CsI and Ni + Ni systems at incident energies from 150 to 400 MeV/nucleon with the data of the FOPI detector. In order to describe completely the flow of the nuclear matter, we fit the double differential momentum distributions with two-dimensional Gaussian. We study the characteristic parameters of the collective flow (flow range, aspect ratios, flow parameter) versus the charge and the mass of the fragments as well as the incident energy and the centrality of the collisions. The transverse energy is used for selecting the central collisions. The method of the Gaussian fits requires also to reconstruct the reaction plane of the event. Then we correct the parameters for the finite number of particles effects and account for the influence of the acceptance of the detector. We confirm the importance of the thermal motion for the light charge or mass fragments and, conversely, the predominance of the collective motion for the heavy fragments. A common flow angle for all the types of particles is highlighted for the first time, demonstrating the power of the method of the Gaussian fits; The evolution of the other parameters confirms the observations done with other methods of flow analysis. These results should contribute to put constraints on the collision models and to enlarge our knowledge of the properties of the nuclear matter. (author)

  2. Cambio en los patrones de crecimiento en una ciudad intermedia: el caso de Chillán en Chile Central

    Directory of Open Access Journals (Sweden)

    Gerardo Azócar

    2003-08-01

    Full Text Available Se identifican los patrones del crecimiento urbano de la ciudad de Chillán (Chile Central, el uso del suelo asociado a cada uno de ellos y los factores que guían el proceso de expansión urbana. Se cuantificaron los cambios en la superficie urbana construida en un período de 57 años (de 1943 hasta el 2000. Entre 1997 y el año 2000, se analizó el cambio en relación con el uso del suelo, la densidad de población y la condición socio-económica de los hogares. Se utilizaron fotografías aéreas, SIG (Arcview 3.2 y Arc-Info N.T e índice de análisis espacial (Spatially Explicit Landscape Index. Un análisis de regresión permitió estudiar la relación entre crecimiento urbano y crecimiento de poblaciónThe patterns of urban growth of Chillán city (Central Chile, the land use associated to each of them and the factors which guide the urban expansion process are identified. Changes in the built urban surface during a period of 57 years (from 1943 until 2000 were quantified. Between 1997 and 2000 were analyzed the changes of land use, population density and home socioeconomic conditions, utilizing aerial photographs, SIG (Arcview 3.2 and Arc-Info N.T and Spatially Explicit Landscape Index. A regression analysis allowed to study the relation between urban growth and population growth

  3. Adaptación de centrales térmicas de carbón al proceso de oxi-combustión

    OpenAIRE

    Alcalá Carrasci¡o, Adrián

    2011-01-01

    El proceso de Oxi-combustión es una de las posibles alternativas para la generación de energía eléctrica, que permite la Captura y Almacenamiento de CO2, con el fin de cumplir los ambiciosos objetivos de reducción de emisiones. Es una prometedora tecnología que permitirá la generación de electricidad mediante combustibles fósiles durante los próximos años. Esta técnica se caracteriza por poder ser implementada en centrales térmicas convencionales, requiriendo en ellas un número mínimo de modi...

  4. La política exterior de los gobiernos no centrales: introducción al caso argentino

    OpenAIRE

    Esposto, Lucía

    2006-01-01

    En un mundo crecientemente interdependiente e interconectado, se hace imposible desconocer la importancia de las actividades de los gobiernos no centrales en la política internacional. La actividad diplomática de estos actores se entrelaza con la de los Estados centrales, en una política de múltiples niveles, con intereses y medios particulares. En la Argentina, la presencia internacional de las provincias es cada vez más significativa. Las participaciones en ferias, congresos, así como la...

  5. Core stability training methods Métodos de treinamento da estabilização central

    Directory of Open Access Journals (Sweden)

    Gabriel Felipe Pioli de Freitas

    2010-10-01

    Full Text Available With the need for the theoretical-empirical basis expansion of the core stability concept, already in progress in the therapeutic repertoire, mainly within the scope of Manual Therapy and Sports Physiotherapy, the demand of work that could bring, the methods of training for core stability was observed. As the low back pain affects or will affect 80% of people all over the world, this therapeutic method has shown effective results in several studies. In this article, several studies were collected from different databases (Scielo, Bireme, Cochrane as well as from our personal archive, in the period from 1987 to 2008. Despite the increase of this subject in Physiotherapy, there is a lack of randomized studies with controlled variables, which could enable exercises that are used empirically to be finally accepted scientifically. Therefore, core stability is an excellent therapeutic method used in several clinical situations, from beginning to the end of a treatment. However, more studies about the core stability training method are suggested. A necessidade de uma ampliação da base teórico-empírica do conceito de estabilização central, por ser uma realidade no arsenal terapêutico, principalmente no âmbito da Terapia Manual e Fisioterapia Desportiva, torna urgente a elaboração de um artigo que traga os métodos de treinamento da estabilização central. Como a lombalgia afeta ou afetará 80% das pessoas de todo o mundo, este método terapêutico mostrou-se eficaz em vários estudos. Para este artigo de revisão, foram utilizados artigos de 1987 a 2008, pesquisados em vários bancos de dados (Scielo, Bireme, Cochrane, além do acervo pessoal. Observou-se que apesar deste assunto estar em ascensão dentro da Fisioterapia, faltam estudos de base aleatória com variáveis controladas, para que mais exercícios usados empiricamente sejam finalmente aceitos cientificamente. Portanto, a estabilização central é um excelente método terap

  6. Fatores associados a infeccao pelo uso do cateter central de insercao periferica em Unidade de Terapia Intensiva Neonatal

    Directory of Open Access Journals (Sweden)

    Elysangela Dittz Duarte

    2013-06-01

    Full Text Available Estudo epidemiológico, longitudinal e analítico, desenvolvido em um hospital de Minas Gerais, com o objetivo de analisar os fatores associados à infecção pelo uso do cateter central de inserção periférica em recém-nascidos internados em unidade de terapia intensiva. A coleta dos dados foi realizada por meio de uma ficha estruturada, preenchida pelos profissionais e verificada pelos pesquisadores. Foram estudados 291 cateteres inseridos em 233 recém-nascidos. Os fatores associados à retirada por suspeita de infecção foram: prematuridade, peso ao nascer até 1.500 gramas, cateter de poliuretano, localização não centralizada do cateter e tempo de uso superior a 30 dias. Após ajuste multivariado, permaneceram independentemente associados: peso inferior a 2.500 gramas na inserção, reparo e tempo de uso do cateter. Conclui-se que fatores relacionados à prática dos profissionais contribuíram para a retirada dos cateteres, sinalizando para a necessidade de intervenções que melhorem a segurança e a eficácia em seu uso.

  7. Electrochemical techniques application in corrosion problems of fossil power plants; Aplicacion de tecnicas electroquimicas en problemas de corrosion en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Cano Castillo, Ulises; Garcia Ochoa, Esteban Miguel; Martinez Villafane, Alberto; Mariaca Rodriguez, Liboria; Malo Tamayo, Jose Maria; Uruchurtu Chavarin, Jorge [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    Some aspects of the electrochemical techniques employed to evaluate the corrosion at low temperature in fossil power plants are commented, as well as the results obtained with the application of them in three power plants of this type. [Espanol] Se comentan algunos aspectos de tecnicas electroquimicas utilizadas para evaluar la corrosion en baja temperatura en centrales termoelectricas, asi como los resultados de la aplicacion de las mismas en tres centrales de este tipo.

  8. Metamorphic history of the Central Pyrenees Part II, Valle de Arán, Sheet 4

    NARCIS (Netherlands)

    Zwart, H.J.

    1963-01-01

    The structural geology and metamorphic petrology of the Bosost area in the Valle de Arán (Central Pyrenees) is discussed. The rocks exposed in this area consist of Cambro-Ordovician mica-schists with numerous granite and pegmatite bodies, phyllites and limestones; Silurian slates and schists and Dev

  9. Las comunidades virtuales de aprendizaje: el papel central de la colaboración

    OpenAIRE

    Manuel Meirinhos; António Osório

    2009-01-01

    Este trabajo tiene como objetivo contribuir para una mejor comprensión de las comunidades virtuales de aprendizaje, vinculadas a los procesos del aprendizaje colaborativo. Se analiza el concepto de comunidad y de comunidad virtual. Se presenta una tipología de comunidades virtuales, destacando las comunidades de aprendizaje y de práctica. Por último, se aborda la importancia de la colaboración, haciendo una asociación de estas comunidades con el paradigma colaborativo emergente, del cual ella...

  10. Diagnosis of feed water, condensate and circulation pumps in electric power plants; Diagnostico de bombas de agua de alimentacion, condensado y circulacion en centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Colin Castellanos, Carlos [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1991-12-31

    This article encompasses the analysis and the diagnosis of the pump`s performance that belong to the feed water, condensate and circulation systems of a fossil fuel power plant (FFPP). For this analysis pressure, temperature and flow data were collected by means of field installed instrumentation, as well as these pumps` motors current consumption and voltage values. Later on, the capacity and the pump efficiency are calculated and compared with the design values, to obtain the actual performance of the equipment with the aid of their characteristic curves (Q vs {Delta}H, Q vs {pi}, etc.). [Espanol] Este articulo comprende el analisis y el diagnostico de comportamiento de las bombas, las cuales forman parte de los sistemas de agua de alimentacion, condensado y circulacion de una central termoelectrica (CT). Para el analisis se recopilan datos de presion, temperatura y flujo de la instrumentacion instalada en campo, asi como de los valores de consumo de corriente y de voltaje en los motores de dichas bombas. Posteriormente, se calcula la capacidad y la eficiencia de las bombas en operacion real y se comparan con los valores de diseno, para obtener el comportamiento real del equipo con ayuda de las curvas caracteristicas (Q vs {Delta}H, Q vs {pi}, etcetera).

  11. Reactores a tório: o futuro da energia nuclear de fissão

    OpenAIRE

    Vilares, João Pedro Martins

    2015-01-01

    A geração de energia eléctrica a partir de energia nuclear sob a forma de fissão afigura-se cada vez mais importante uma vez que a utilização de combustíveis fósseis terá necessariamente um fim, relacionado sobretudo com a crescente dificuldade de acesso a reservas desses combustíveis. Com o presente trabalho pretende-se discutir as vantagens e os inconvenientes da utilização do tório em reactores nucleares relativamente aos reactores tradicionais a operar a urân...

  12. Corrales de piedra, campos abiertos y pampas de camaruco: Memorias de relacionalidad en la meseta central de Chubut Stone yards, open fields and sacred places: Memories of relatedness in the Chubut´s central plateau

    Directory of Open Access Journals (Sweden)

    Ana Ramos

    2008-12-01

    Full Text Available La "cuestión indígena" como política de estado en Argentina ha estado acompañada por la elaboración académica de mapas étnicos. Las definiciones hegemónicas de estas entidades han presupuesto generalmente algún elemento "esencial" como, por ejemplo, fenotipos, uso de una lengua, o la aglutinación en torno a linajes consanguíneos. A partir de las reformulaciones de las teorías del parentesco desde el modelo heurístico de las sociedades de casas y las teorías sobre la relacionalidad proponemos una aproximación a la memoria social como marco alternativo de interpretación histórica. Esta contempla las prácticas sociales del parentesco y la objetivación de la continuidad de los grupos de pertenencia en las políticas y lugares de la memoria -corrales de piedra, actividades productivas y pampas de camaruco- en la región de la "meseta" de Chubut. Dichas relaciones con el espacio físico cuestionan tanto las definiciones académicas tradicionales de parentesco y de cacicazgo como las clasificaciones étnicas-nacionales.The "Indigenous issue" as a state policy in Argentina has been accompanied by an academic production of ethnic maps. Hegemonic definitions of these entities used to presume some "essential" elements like the phenotype, the use of language or consanguineous lineage membership. Based on the reformulation of kinship theory, which came from the heuristic model of houses and relatedness theory, we propose an approach to social memory as an alternative framework for historical interpretation. This includes kinship social practices as well as the materialization of group membership's continuity in policies and places of memory -such as stone yards, productive activities, open fields and sacred places- in the Chubut central plateau. Finally, we argue that regarding a physical space, these relations question not only the ethnic-national classifications but also the traditional academic definitions of kinship and chieftaincy.

  13. The reactor ALLEGRO and the sustainable nuclear energy in Central Europe

    Directory of Open Access Journals (Sweden)

    Gadó János

    2014-01-01

    Full Text Available The Visegrád-4 countries (CZ, HU, PL and SK would like to use nuclear energy on the long run. The construction of new Generation 3+ nuclear units probably belong in each country to this realm. These reactors will provide safe and cheap electric energy approximately until the end of the 21st century. In order to use nuclear energy in the 22nd century, sustainability of fuel supply shall be achieved by applying Generation 4 breeder reactors with fast spectrum. The corresponding research and development is organized now in the framework of the V4G4 Centre of Excellence establshed by the nuclear research institutes of the region with a strong technical support from the French CEA. The most important milestone of these efforts is the start-up of the ALLEGRO reactor that shall demonstrate the viability of the gas cooled fast reactor technology.

  14. Use of hafnium in control bars of nuclear reactors; Uso de hafnio en barras de control de reactores nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez S, J.R.; Alonso V, G. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)]. e-mail: jrrs@nuclear.inin-mx

    2003-07-01

    Recently the use of hafnium as neutron absorber material in nuclear reactors has been reason of investigation by virtue of that this material has nuclear properties as to the neutrons absorption and structural that can prolong the useful life of the control mechanisms of the nuclear reactors. In this work some of those more significant hafnium properties are presented like nuclear material. Also there are presented calculations carried out with the HELIOS code for fuel cells of uranium oxide and of uranium and plutonium mixed oxides under controlled conditions with conventional bars of boron carbide and also with similar bars to which are substituted the absorbent material by metallic hafnium, the results are presented in this work. (Author)

  15. Updates of the fire protection system of the Juzbado Nuclear Fuel Fabrication Plant; Actualizaciones del Sistema de Proteccion Contra Incendios de la Fabrica de Combustible Nuclear de Juzbado

    Energy Technology Data Exchange (ETDEWEB)

    Dorado, P.; Palomo, J. J.; Romano, A.

    2015-07-01

    The Juzbado Nuclear Fuel Fabrication Plant fire protection system is one of the most important safety system of the plant. Every year, a large part of the annual investment is employed to improve this system, to update its technology, in order to improve detection and extinction capability to minimize fire risk. Over the last few years, several improvement projects have been carried out that focused on fire detection technology update and on optimization of local detectors integration with a centralized control system, as well as on an advanced public address system, which used clear and unambiguous messages improving personnel response to a plant evacuation. Planned projects and those, which are currently under development, focus on improving passive fire protection means as well as fire protection of key emergency response equipment s such as emergency diesel generators and fire extinguishing bombs. (Author)

  16. Superiority of centralized procurement and its technical and economic analysis for nuclear power intensification construction

    International Nuclear Information System (INIS)

    The intensified management is the basic orientation for modernized enterprise group to improve efficiency and benefit. For most industrial enterprises, in the implementation of intensification management process, the centralized procurement is one of most efficient paths. At present most of the international's and domestic outstanding enterprises are studying and positively using this approach. This article indicated that the centralized procurement mode is inevitable during intensification construction process based on the theoretical analysis of the advantage of centralized procurement and the economic analysis of typical cases. (author)

  17. Applications of the gas chromatography in the nuclear science and technology; Aplicaciones de la cromatografia de gases a la ciencia y tecnologia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Gasco Sanchez, L.

    1972-07-01

    This paper is a review on the applications of the gas chromatography in the nuclear science and technology published up to December 1971. Its contents has been classified under the following heads; I) Radiogaschromatography, II) Isotope separation, III) Preparation of labelled molecules, IV) Nuclear fuel cycle, V) Nuclear reactor technology, VI) Irradiation chemistry, VIl) Separation of me tal compounds in gas phase, VIII) Applications of the gas chromatography carried out at the Junta de Energia Nuclear, Spain. Arapter VIII only includes the investigations carried out from January 1969 to December 1971. Previous investigations in this field has been published elsewhere. (Author)

  18. 1989 annual report of the Rossendorf Central Institute of Nuclear Research

    International Nuclear Information System (INIS)

    The research and development results are classified by research lines. Each section starts with an introduction summing up the developments of the particular field of work, followed by progress reports on specific projects, contributions on partial results not published so far, and summaries of 1989 publications. Research priorities are, among others, the fields of nuclear spectroscopy; ion-beam solid state physics; positron emission tomography; nuclear trace technology; neutron doping, and accelerator development. (DG)

  19. Impacto de la cultura organizacional en la gestión del riesgo operativo en los bancos centrales: caso Banco de la República

    OpenAIRE

    Ceballos Reyes, Diana Carolina

    2015-01-01

    En este trabajo se analiza el impacto de la cultura organizacional en la gestión de riesgo operativo en el banco central de Colombia, el Banco de la República. El problema de investigación se aborda desde un enfoque explicativo positivista que permite identificar relaciones estadísticamente significativas entre dimensiones de la cultura organizacional y la gestión del riesgo operativo.

  20. Suscetibilidade de Spodoptera Frugiperda a isolados geográficos de um vírus de poliedrose nuclear Spodoptera Frugiperda susceptibility to nuclear polyhedrosis virus geographical isolates

    Directory of Open Access Journals (Sweden)

    Sérgio Arce Gomez

    1999-09-01

    Full Text Available O presente trabalho objetivou verificar a suscetibilidade de larvas de segundo ínstar de Spodoptera frugiperda (Smith, 1797 a sete isolados geográficos de um vírus de poliedrose nuclear (VPN, conduzindo-se sete bioensaios no Laboratório de Patologia de Insetos da Embrapa-Centro Nacional de Pesquisa de Soja, Londrina. Para cada isolado preparou-se dieta artificial contendo 0, 2x10³, 4x10³, 8x10³, 16x10³, 32x10³ e 64x10³ corpos poliédricos de inclusão (CPI/mL. Cada dose foi oferecida às larvas em copos de plástico de 50 mL, sob condições controladas (temperatura: 26±2ºC; umidade relativa: 60±10%; fotófase:14 horas. A análise (Probits realizada sobre o somatório de larvas mortas (contadas, diariamente, do quinto ao décimo quarto dia após a inoculação mostrou, com base na ausência de sobreposição das amplitudes dos intervalos de confiança das concentrações letais médias (CL50, que: o isolado de Sertaneja, PR (5.631 CPI/mL, foi o mais virulento; o da Guatemala (11.520 CPI/mL equivaleu aos de Ponta Grossa, PR (14.184 CPI/mL, Argentina (15.891 CPI/mL e Alabama, EUA (17.558 CPI/mL, mas foi superior aos isolados de Louisiana, EUA (19.325 CPI/mL e Sete Lagoas, MG (25.310 CPI/mL. A variação do tempo letal médio, de 8,3 a 10 dias, não foi significativa em relação aos isolados.In order to verify the Spodoptera frugiperda (Smith,1797 second instar larvae susceptibility to seven nuclear polyhedrosis virus (NPV geographical isolates, seven bioassays were carried out at Embrapa-Centro Nacional de Pesquisa de Soja, Insect Pathology Laboratory, Londrina, Paraná State, Brazil. Artificial diet containing 0 (control, 2x10³, 4x10³, 8x10³, 16x10³, 32x10³, and 64x10³ polyhedral inclusion bodies (PIB/mL was prepared for each virus isolate; each dose was offered, in 50 mL plastic cups to the larvae under controlled conditions (temperature 26±2ºC; relative humidity: 60±10% and photophase: 14 hours. The statistical analysis

  1. Análisis estructural del extremo sur de la Precordillera Central Sanjuanina Structural analysis at the southern end of the Central Precordillera of San Juan

    Directory of Open Access Journals (Sweden)

    P. Giampaoli

    2003-03-01

    Full Text Available La Precordillera Central de San Juan es una faja plegada y corrida de piel fina que está limitada hacia el este por las estructuras de piel gruesa de la Precordillera Oriental. El objetivo de este estudio es describir e interpretar las estructuras encontradas en el extremo sur de esta faja plegada y corrida. Los pliegues presentes en las lomas de Andapaico son asimétricos, abiertos, de tipo chevron y están genéticamente relacionados a la propagación de una falla. Hacia el norte el pliegue es más cerrado y está fragmentado por fallas. La estructura regional consiste en un abanico imbricado de pliegues por propagación de falla y corrimientos fuera de secuencia relacionados al levantamiento de las estructuras de la Precordillera Oriental. El nivel de despegue principal está localizado cerca del techo de la caliza de la Formación San Juan. La evolución de la deformación se produjo en dos etapas. Primero se desarrolla un abanico imbricado de pliegues por propagación de falla como resultado de la migración hacia el antepaís del frente de corrimientos. Luego el levantamiento de la Precordillera Oriental impide la propagación del frente de corrimiento, lo cual pudo disparar la formación de las estructuras fuera de secuencia de la Precordillera Central. El acortamiento horizontal mínimo calculado es de 4,8 km y la estructura regional muestra una disminución del acortamiento en dirección sur que afecta a estructuras de varios órdenes y estilos de deformación.The Central Precordillera of San Juan is a thin-skinned fold and thrust belt bounded to the east by the thick-skinned structures of the Eastern Precordillera. The objective of this study is to describe and interpret the structural features found at the southern end of this fold and thrust belt. The lomas de Andapaico's folds are of asymmetric, open chevron type, and are genetically related to fault propagation. Toward the north, the folding becomes tighter and broken by faults

  2. Simuladores aplicados en laboratorios de energía nuclear

    OpenAIRE

    Pérez Lucero, Alejandra Lucía; Chautemps, Norma Adriana; Bertone, Rodolfo Alfredo; Díaz, Laura Cecilia

    2015-01-01

    En este trabajo se presentan avances en el marco del proyecto de tesis “Usos de simuladores virtuales para laboratorios de enseñanza en energía nuclear”, que consisten en indagar acerca del grado de aceptación de una herramienta educativa para prácticas de laboratorio sobre física de las radiaciones. Mediante la incorporación de este simulador en los procesos de enseñanza, se persigue el objetivo de reducir los riesgos propios de la manipulación de fuentes radiactivas, antes de haber adquirid...

  3. Simulação da Central de Cogeração da Refinaria de Matosinhos (Petrogal)

    OpenAIRE

    Monteiro, Ana Luísa Oliveira

    2013-01-01

    Mestrado em Engenharia Química – Ramo Optimização Energética na Indústria Química A atual crise tem vindo a despertar, cada vez mais, o sentido de racionalização e otimização energética. A nível industrial uma das tecnologias utilizadas para combater o desperdício de energia diz respeito à cogeração. É neste contexto que surge a central de cogeração da Refinaria de Matosinhos (Petrogal), uma vez que depende fortemente da produção de vapor para garantir o funcionamento. O tema desta tese...

  4. Procesos de transición en Europa Central y del Este: hacia el Estado social de derecho y la economía de mercado

    Directory of Open Access Journals (Sweden)

    J. Antolínez

    2010-11-01

    Full Text Available Tras la desintegración de la Unión Soviética y el fin de la guerra fría los países de Europa Central y del Este hicieron tránsito hacia el modelo capitalista de desarrollo en un proceso muy corto. El relativo éxito de ese tránsito solo se explica si se considera que estuvo acompañado de la construcción de estados, en sentido weberiano, en los que el fortalecimiento de la democracia, la construcción de la nacionalidad y el establecimiento de políticas sociales adecuadas jugaron un papel decisivo. No obstante, las diferencias políticas, económicas y sociales entre los países de Europa Central y del Este son tan grandes, que los resultados de esa transición fueron, como hoy puede constatarse, muy diversos.

  5. Criticality calculation of the nuclear material warehouse of the ININ; Calculo de criticidad del almacen del material nuclear del ININ

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, T.; Angeles, A.; Flores C, J., E-mail: teodoro.garcia@inin.gob.mx [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2013-10-15

    In this work the conditions of nuclear safety were determined as much in normal conditions as in the accident event of the nuclear fuel warehouse of the reactor TRIGA Mark III of the Instituto Nacional de Investigaciones Nucleares (ININ). The warehouse contains standard fuel elements Leu - 8.5/20, a control rod with follower of standard fuel type Leu - 8.5/20, fuel elements Leu - 30/20, and the reactor fuel Sur-100. To check the subcritical state of the warehouse the effective multiplication factor (keff) was calculated. The keff calculation was carried out with the code MCNPX. (Author)

  6. Aplicação de técnicas de manutenção preditiva aos equipamentos de uma central hidroeléctrica

    OpenAIRE

    Fernandes, César Manuel Gonçalves

    2013-01-01

    Dissertação de mestrado integrado em Engenharia Mecânica A manutenção das centrais hidroeléctricas tem assumido uma posição estratégica em busca de melhores desempenhos e alargamento dos períodos de indisponibilidade destas. Os custos associados a uma indisponibilidade de uma central são avultados, fruto do mercado competitivo e da dimensão das operações de manutenção pelo que a antecipação à falha e um planeamento exaustivo poderão beneficiar os resultados financeiros das orga...

  7. Adaptabilidade e estabilidade de genótipos de girassol no Brasil Central Adaptability and stability of sunflower genotypes in Central Brazil

    Directory of Open Access Journals (Sweden)

    Anna Karolina Grunvald

    2008-11-01

    Full Text Available O objetivo deste trabalho foi avaliar a adaptabilidade e estabilidade de genótipos de girassol, no Brasil Central, quanto ao rendimento de grãos e de óleo. Os dados foram obtidos de ensaios de genótipos de girassol coordenados pela Embrapa Soja, de 2004 a 2007. Foram usados os métodos de Eberhart & Russell, Porto et al., Rocha et al. e Annicchiarico. Foi realizada a decomposição do índice de recomendação de Annicchiarico nos ambientes favoráveis e desfavoráveis. Este método e o de Porto et al. foram similares e mais adequados para avaliar a adaptabilidade dos genótipos. Em relação ao rendimento de grãos, as variedades BRSGira 02 e Nutrissol apresentaram adaptação ampla. Os híbridos Agrobel 959, MG50 e V03005 e as variedades Catissol e Multissol apresentaram adaptação aos ambientes favoráveis, e os híbridos BRHS 02 e BRHS 04 apresentaram adaptação aos ambientes desfavoráveis. Quanto ao rendimento de óleo, os híbridos Agrobel 959, V03005, MG50, VDH 487, EXP 1441, EXP 1447 e EXP 1446 e as variedades BRSGira 01, BRSGira 02 e Nutrissol apresentaram adaptação ampla. O híbrido MG52 e as variedades Catissol e Multissol mostraram adaptação aos ambientes favoráveis, e BRHS 04 e BRHS 02 mostraram adaptação aos ambientes desfavoráveis. Os genótipos selecionados mostraram-se estáveis, mas em níveis diferenciados.The objective of this study was to evaluate the adaptability and stability of sunflower genotype grain and oil yield, in Central Brazil. The analyzed data were obtained from sunflower genotype trials coordinated by Embrapa Soja, from 2004 to 2007. Genotype adaptability and stability were evaluated using the methods of Eberhart & Russell, Porto et al., Rocha et al., and Annicchiarico. The Annicchiarico method divides sites into favorable and unfavorable environments. This method and the one of Porto et al. were similar and more adequate to evaluate genotypic adaptability. For grain yield, the varieties BRSGira

  8. Evaluación de indicadores ecológicos en las comunidades de corales hermatípicos de la costa sur-central, provincia de Cienfuegos, Cuba

    OpenAIRE

    Cabrales Caballero, Yenizeys; González Díaz, Silvia Patricia

    2015-01-01

    Los arrecifes de la región sur-central de Cuba han sido muy poco investigados, a la vez que se incrementan y diversifican los usos e impactos a que est{n siendo sometidos. Debido a lo anterior, el objetivo de esta investigación fue determinar el estado actual de las comunidades de corales hermatípicos a través de la evaluación de indicadores ecológicos. La investigación se llevó a cabo en julio del 2011 en dos estaciones de cresta y cuatro de camellones pertenecientes a la costa de Cienfuegos...

  9. Tamanho e Número Ideal de Amostras para Coleta de Gafanhotos na Região Depressão Central do Rio Grande do Sul

    OpenAIRE

    Nathália Carvalho; Ervandil Costa; Danilo Souza; Juliana Garlet

    2013-01-01

    Objetivando observar a viabilidade de um novo método para amostragem de acridóideos (conhecidos vulgarmente por gafanhotos), bem como a distancia percorrida e número ideal de amostras para amostragem foi proposto o estudo. Os levantamentos foram conduzidos em duas áreas de campo nativo no município de São Sepé, localizado na região Depressão Central no RS. As coletas foram realizadas durante o verão de 2009 com o auxilio de uma rede de coleta adaptada. As distâncias avaliadas foram de 5, 10, ...

  10. DIFERENCIAÇÃO NA PRESTAÇÃO DE SERVIÇO EM UMA CENTRAL DE RELACIONAMENTO. UM ESTUDO DE CASO NA TELEFÔNICA.

    Directory of Open Access Journals (Sweden)

    Luciana Marin Faneco

    2009-09-01

    Full Text Available As transformações decorrentes da mudança do comportamento do consumidor e a abertura do mercado, que desencadeou o aumento da concorrência e a competição pela lucratividade, podem ser caracterizadas como fatores que estimularam a busca de diferenciação das empresas que atuam no mercado de telecomunicações. Isso ocorreu por meio de investimentos em novas formas de prestação de serviços no atendimento ao cliente e por intensas inovações. Neste contexto, este trabalho de pesquisa apresenta uma análise relevante quanto aos fatores de diferenciação em Contact Center, pois realizou um levantamento teórico e um estudo de caso em uma empresa do setor de telecomunicações, tendo como foco a análise das oportunidades geradas ao empreender uma estratégia de diferenciação e enfoque em serviços prestados através desta estrutura de atendimento. Os resultados encontrados apontam que a Telefonica tem desenvolvido, no segmento de atuação business to business, novos conceitos na Central de Relacionamento para gerar negócios lucrativos e melhorias na prestação de serviços. O estudo também evidencia quais formas de diferenciação têm sido aplicadas pela empresa, e quais os impactos por elas gerados; e um dos aspectos reveladores é que as ações diferenciadas implementadas na Central de Relacionamento da Telefonica, do segmento empresas, possuem uma convergência com duas das três estratégias genéricas de Porter: diferenciação e enfoque na diferenciação.

  11. Mejoramiento habitacional en las áreas urbanas centrales de América Latina. Del combate de tugurios a la rehabilitación habitacional progresiva

    Directory of Open Access Journals (Sweden)

    Víctor Delgadillo

    2008-01-01

    Full Text Available Este artículo presenta un amplio panorama sobre las experiencias habitacionales en las antiguas áreas urbanas centrales, que en los últimos años se han realizado en diversas ciudades latinoamericanas; asimismo destaca sus innovaciones y limitaciones. El artículo analiza la problemática de las áreas urbanas centrales, territorios que padecen la expansión de las actividades terciarias, vaciamiento de población y vivienda, deterioro físico y social, y simultáneamente procesos de segregación socioespacial y de recuperación selectiva del patrimonio edificado. El artículo presenta una serie de proyectos y programas de vivienda, realizados desde mediados de la década de 1980 en distintas ciudades latinoamericanas, que han tenido por objeto enfrentar la problemática de los tugurios, mejorar la calidad de vida de la población residente, recuperar el patrimonio histórico, y en algunos casos revertir las tendencias de despoblamiento de las áreas centrales y de expansión urbana periférica. Aquí se presentan 1. Proyectos piloto de rehabilitación habitacional, 2. Algunos pioneros programas de vivienda, 3. Programas de densificación habitacional, 4. Programas emergentes de vivienda, y 5. Programas de mejoramiento habitacional. A manera de conclusiones, se realizan algunas reflexiones sobre los avances y desafíos que se presentan para atender la problemática de la vivienda en las áreas centrales de nuestra región.

  12. Serpentinitas y cromititas de La Cabaña, Cordillera de la Costa, Chile central

    OpenAIRE

    Fernando Barra; Osvaldo M Rabbia; Guillermo Alfaro; Hubert Miller; Christine Höfer; Stefan Kraus

    1998-01-01

    RESUMEN Las serpentinitas del área de La Cabaña forman parte de la Serie Occidental del Basamento Metamórfico de la Cordillera de la Costa de la IX Región y corresponden a dunitas de grano grueso parcial a totalmente serpentinizadas. Contienen cromita como mineral accesorio, la que generalmente está alterada en grado variable a ferricromita. En cambio, las cromitas presentes en las cromititas de Centinela Bajo, preservan su composición original con un mínimo grado de alteración, lo que permit...

  13. Core reactor simulation of the Central Laguna Verde (CLV) reactor in stationary state and an example of the application in the recharge options analysis of cycle 3; Simulacion del nucleo del reactor de la Central Laguna Verde (CLV) en estado estacionario y ejemplo de aplicacion en el analisis de alternativas de recarga del ciclo 3

    Energy Technology Data Exchange (ETDEWEB)

    Ocampo Mansilla, Hector; Francois Lacouture, Juan Luis; Blanco Lara, Jesus; Cortes Campos, Carlos Cristobal; Esquivias Montoya, Jesus; Esquivel Torres, Jose Luis; Martin del Campo Marquez, Cecilia [Instituto de Investigaciones Electricas, Cuernavaca (Mexico); Montes Tadeo, Jose Luis [Instituto Nacional de Investigaciones Nucleares (ININ), Salazar (Mexico); Sanchez Herrera, Luciano; Torres Alvarez, Carlos [Comision Federal de Electricidad (CFE), Mexico, D. F. (Mexico)

    1991-12-31

    The results are presented of a study requested by Comision Federal de Electricidad (CFE) for the analysis of Cycle 3, of Unit No. 1 of the Laguna Verde Nuclear Power Station (CLNV) and determine the burning effect impact, carried out with the starting tests and the operation of Cycles 1 and 2 on base of the cycle extension known as coastdown. The calculations were realized with the Code Package FMS for fuel managing, using the Code PRESTO-B that analyzes the reactor in detailed form in three dimensions an in stationary state. In the study the schemes of fraction of recharge proposed by General Electric (GE) were analyzed with the effect of cycle extension. The initial design value of 100 assemblies for Cycle 3, GE proposes to increase such fraction from 112 to 120 assemblies. This impacts the cost of the second recharge and the purpose of this investigation is to analyze options with higher fuel enrichment in U-235 to minimize the number of assemblies in this recharge. The analyses effected show that the designs proposed by GE do not fulfill the required energy proposed for the cycle, even using in the recharge only fuel with 3.03% of enrichment. It is proposed, likewise, the fuel enrichment up to 3.25% to satisfy the energy demand with a minimum of assemblies. [Espanol] Se presentan los resultados de un estudio solicitado por la Comision Federal de Electricidad (CFE) para analizar el ciclo 3, de la unidad 1 de la Central Laguna Verde (CLV), y determinar el impacto del efecto de quemado llevado a cabo con las pruebas de arranque y por la operacion de los ciclos 1 y 2 con base en la tecnica de alargamiento del ciclo conocida como coastdown1. Los calculos se realizaron con el paquete de codigos FMS para la administracion de combustible, usando el codigo PRESTO-B que analiza el reactor en forma detallada en tres dimensiones y en estado estacionario. Se analizaron en el estudio los esquemas de fraccion de recarga propuesta por la General Electric (GE) con el efecto de

  14. Diffuse control of gas turbines in power stations of combined cycle; Contral difuso de turbinas de gas en centrales de ciclo combinado

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez P, Marino; Garduno R, Raul; De Lara J, Salvadror; Castelo C, Luis [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2001-07-01

    In this article the application of the technology of the fuzzy logic to the control of gas turbines is presented in order to evaluate it in one of the most difficult processes and with stricter control requirements that exist in the electrical generation industry. For being important for the generation electrical sector, given their use in Comision Federal de Electricidad (CFE), the first selected prototype was the gas turbines model W501 of Westinghouse, installed in the of combined cycle power stations of Dos Bocas, Veracruz, Gomez Palacio, Durango and Tula, Hidalgo, Mexico. The second selected prototype was the one of the turbo gas units type 5001 (that applies to the GE 5001 models and Westinghouse of series 191 and 251). Based on the analysis of the performance of the system of conventional control previously made, the controllers of speed and generation of electrical power were selected to be replaced by diffuse controllers. [Spanish] En este articulo se presenta la aplicacion de la tecnologia de la logica difusa al control de turbinas de gas con el proposito de evaluarla en uno de los procesos mas dificiles y con requerimientos mas estrictos de control que existen en la industria de generacion electrica. Por ser importantes para el sector electrico de generacion, dada su utilizacion en Comision Federal de Electricidad (CFE), el primer prototipo seleccionado fueron las turbinas de gas modelo W501 de Westinghouse, instaladas en la central de ciclo combinado de Dos Bocas, Veracruz, Gomez Palacio, Durango y Tula, Hidalgo, Mexico. El segundo prototipo seleccionado fue el de unidades turbogas tipo 5001 (que aplica a los modelos GE 5001 y Westinghouse de la serie 191 y 251). Basados en el analisis del desempeno del sistema de control convencional realizado previamente, los controladores de velocidad y de generacion de potencia electrica fueron seleccionados para ser sustituidos por controladores difusos.

  15. Strategies and actions for the mitigation of the phenomenon DENTING in the tube sheet (TTS Denting) steam generators of the NPP Asco Denting at the top of the SG tube sheet (TTS tube denting) has recently been experienced in new and replacement SGs at several plants; Estrategias y acciones para la mitigacion del fenomeno DENTING en la placa tubular de generadores de vapor (TTS DENTING) de la Central Nuclear de Asco

    Energy Technology Data Exchange (ETDEWEB)

    Espanol Villar, J.

    2013-07-01

    It is highly likely that the accumulation of sludge (deposits) on the tube sheet is clearly associated with the denting occurrence. More specifically, it is commonly believed that an aggressive crevice environment formed within the deposits or in the shallow tight tube sheet to tube crevice below the deposits is at the origin of the denting (tube deformation), and, when present, the consequent stress corrosion cracking (SCC). There are described a set of strategies that have been followed since the emergence of the TTS denting phenomenon on Steam Generator of the Nuclear Power Plants Asco I and II, influenced by the presence of hard sludge in the tube plate of Steam Generators, their results and the evolution of the phenomenon in relation to the various measures taken.

  16. El difícil reto de la energía nuclear

    OpenAIRE

    Sánchez León, José Guillermo

    2002-01-01

    La energía nuclear aplicada a usos civiles, casi desde sus orígenes, ha sido objeto de una feroz campaña por parte de grupos antinucleares. Su impopularidad, asumida por gran parte de la prensa y del poder político, dificulta un análisis riguroso del tema. Un accidente con dos muertos, como el ocurrido en el año 2000 en la planta japonesa de conversión de uranio de Tocahimura, habría pasado inadvertido en otro tipo de industria, pero fue noticia mundial durante días.

  17. Cogeneration in large processing power stations; Cogeneracion en grandes centrales de proceso

    Energy Technology Data Exchange (ETDEWEB)

    Munoz, Jose Manuel [Observatorio Ciudadano de la Energia A. C., (Mexico)

    2004-06-15

    In this communication it is spoken of the cogeneration in large processing power stations with or without electricity surplus, the characteristics of combined cycle power plants and a comparative analysis in a graph entitled Sale price of electricity in combined cycle and cogeneration power plants. The industrial plants, such as refineries, petrochemical, breweries, paper mills and cellulose plants, among others, with steam necessities for their processes, have the technical and economical conditions to cogenerate, that is, to produce steam and electricity simultaneously. In fact, many of such facilities that exist at the moment in any country, count on cogeneration equipment that allows them to obtain their electricity at a very low cost, taking advantage of the existence steam generators that anyway are indispensable to satisfy their demand. In Mexico, given the existing legal frame, the public services of electricity as well as the oil industry are activities of obligatory character for the State. For these reasons, the subject should be part of the agenda of planning of this power sector. The opportunities to which we are referring to, are valid for the small industries, but from the point of view of the national interest, they are more important for the large size facilities and in that rank, the most numerous are indeed in PEMEX, whereas large energy surplus and capacity would result into cogenerations in refineries and petrochemical facilities and they would be of a high value, precisely for the electricity public service, that is, for the Comision Federal de Electricidad (CFE). [Spanish] En esta ponencia se habla de la cogeneracion en grandes centrales de proceso con o sin excedentes de electricidad, las caracteristicas de plantas de ciclo combinado y se muestra el analisis comparativo en una grafica titulada precio de venta de electricidad en plantas de ciclo combinado y de cogeneracion. Las plantas industriales, tales como refinerias, petroquimicas

  18. Los espacios libres públicos como expresión de la identidad de los barrios centrales de Recife./ The public spaces as an expression of the identity of the central districts of Recife.

    Directory of Open Access Journals (Sweden)

    Leão Barros, Sandra Augusta.

    2008-06-01

    Full Text Available Recife, al racif (acera de piedra en homenaje a la barrera de arrecifes naturales existentes, es el nombre de la ciudad que tuvo en la geografía natural su función primaria de núcleo portuario, y tiene hasta hoy su identidad ligada a los espacios públicos de sus barrios centrales, su forma natural da lugar a la forma construida, siendo moldeada por esta. Como porción de tierra tomada en parte al río, y en parte al mar, aspira desde siempre a la libertad, destacando su espíritu colectivo, y el gusto por los horizontes libres permitiendo observar el gran océano y los ríos que la rodean. Desde el dominio holandés (1630-1654, período que vio una gran reforma y configuración de su centro (formado por varias islas y puentes, hubo preocupación por presencia de espacios públicos diversos en su trazado: jardines del palacio, márgenes de muelles y cabezas de puentes, patios de iglesias y/o mercados. El trazado urbano de los barrios centrales –Barrio del Recife, San Antonio y San José, comienzan a tomar cuerpo y significado tomando en cuenta el ancho de las calles y el largo de las manzanas, perfil que continua hasta hoy en gran parte de esos barrios, aunque las fachadas hayan sido cambiadas./The author analyses how the Brazilian city of Recife takes the natural geography as platform for its urban development. In the Dutch occupation (1630-1654, the city was reconfigured, and the downtown was defined in the way we see them now, with open public spaces toward the ocean and city river.

  19. DISEÑO CONCEPTUAL DE UN SISTEMA CONTROLADO POR UN ACELERADOR PARA TRANSMUTACIÓN DE RESIDUOS NUCLEARES Y APLICACIONES ENERGÉTICAS

    OpenAIRE

    GARCIA FAJARDO, LAURA

    2012-01-01

    Las posibilidades de desarrollo de la energía nuclear aumentan considerablemente con el incremento de la demanda energética mundial. Sin embargo, el manejo de los residuos provenientes del combustible nuclear gastado de las plantas nucleares convencionales es actualmente uno de los principales problemas que enfrenta el uso de esta fuente de energía. El objetivo del presente trabajo consistió en realizar el diseño conceptual del TADSEA (Transmutation Advanced Device for Sustainable Energy Appl...

  20. Prevalencia de anticuerpos contra virus dengue en el cantón de Golfito (2005 y en el Distrito Central de Puntarenas (2005-2006, Costa Rica

    Directory of Open Access Journals (Sweden)

    Margarita Lee-Lui

    2008-09-01

    Full Text Available Justificación y objetivo: La primo infección con el virus dengue varía desde asintomática hasta cuadros muy severos, como el dengue hemorrágico o el síndrome de choque por dengue. El Distrito Primero de Puntarenas ha sido una de las poblaciones más afectadas desde 1993, cuando aparecieron los primeros brotes, hasta hoy, con una disminución de la incidencia en los últimos años. La región Brunca fue la segunda en incidencia en el país en 1998, y si bien la endemicidad se ha mantenido, no existen estudios epidemiológicos sobre la prevalencia de esta enfermedad; los datos que aporta el Ministerio de Salud corresponden a la incidencia de casos clínicos en un período determinado. El objetivo de este estudio fue determinar la seroprevalencia en el Distrito Primero de Puntarenas y en Golfito para conocer la vulnerabilidad de la población de sufrir fiebre hemorrágica por dengue y analizar la situación asociada a los datos epidemiológicos de estas regiones, tales como edad, sexo y ubicación geográfica, ya que una población susceptible es la que presenta una alta seroprevalencia, unida a condiciones de hacinamiento y alta densidad vectorial. Métodos: El muestreo se realizó con el método EPI descrito por la OMS. Se recolectaron 210 muestras de suero en cada distrito, se desarrolló y estandarizó una prueba de ELISA de captura de antígeno para la detección de anticuerpos tipo IgG contra dengue, usando como referencia el método de reducción de placas de Dulbecco considerado estándar de oro. Resultados: La seroprevalencia contra dengue fue del 43.8% (92 y del 90% (189 en los distritos de Golfito y Central de Puntarenas, respectivamente, sin diferencias significativas respecto al sexo, la edad y la localidad. Se obtuvo un 83% y un 95% de correlación en Golfito y Puntarenas, respectivamente, entre los casos sintomáticos y la serología con el método estandarizado. Un 32% y un 42% del total de seropositivos en cada localidad

  1. VIOLENCIA POLÍTICA, ASISTENCIA MILITAR DE ESTADOS UNIDOS Y PRODUCCIÓN DE COCA EN LOS ANDES CENTRALES

    Directory of Open Access Journals (Sweden)

    Moisés Arce

    2006-01-01

    Full Text Available ¿Tiene la violencia política un impacto significativo sobre la producción de drogas en los Andes Centrales? ¿Disminuye la ayuda militar estadounidense la oferta de drogas ilícitas que se origina en los Andes Centrales? ¿Qué otros factores ayudan a explicar dicha producción? ¿Tiene la lucha estadounidense contra el narcotráfico las mismas consecuencias en cada país? Este trabajo evalúa de manera empírica los efectos de la violencia política y la ayuda exterior de Estados Unidos (EE.UU. en los tres países productores de droga más prolíficos de América Latina: Colombia, Bolivia y Perú. Los resultados guardan relación directa con la literatura existente que recalca los obstáculos que los gobiernos enfrentan cuando pretenden regular los mercados de bienes de contrabando. Un análisis comparativo de la política antidrogas de EE.UU. aclara los éxitos y las limitaciones de la estrategia que actualmente se lleva a cabo, particularmente en Colombia, donde la violencia política ha facilitado el fortalecimiento del narcotráfico a nivel internacionalWhat is the effect of political violence on the production of coca in the Central Andes? Does U.S. military aid reduce the amount of drugs that originate from this region? What other factors help explain the production of coca? Are the effects of U.S. military aid the same across the Andean nations? This paper tests the effects of political violence and U.S. military aid in the drug producing nations of Colombia, Bolivia and Peru. Our results are consistent with existing literature that emphasizes the obstacles that governments face as they attempt to suppress markets for prohibited goods. Our comparative analysis sheds new light on the limitations of the current U.S. policy, particularly in Colombia, where political violence has strengthened the global drug trade

  2. Industrial risks - Traceability and the centralization of responsibilities are essential for nuclear safety

    International Nuclear Information System (INIS)

    A new regulation has been implemented in France concerning the safety and the transparency of nuclear activities. The main changes are the centralisation of the responsibilities through first, a clear reaffirmation that the operator of the facility is the only responsible for the facility operations and secondly the limitation of sub-contracting to the level 3 for instance a society chosen by EDF to provide services can sub-contract some of these services but the sub-contractor himself is not allowed to sub-contract. The transparency of nuclear activities is improved through making it compulsory to have a written record of any decision taken in a nuclear facility. (A.C.)

  3. Algunas hipótesis para el estudio de la resistencia campesina en la región central de Colombia. Siglo XIX

    Directory of Open Access Journals (Sweden)

    Guiomar Dueñas Vargas

    2012-07-01

    Full Text Available Las formas corrientes de resistencia entre los campesinos incluyen el disimulo, la lentitud en el ejercicio de sus tareas, el fingimiento de ignorancia, el hurto de pequeñas cosas y el sabotaje. Otras formas de acción campesina comprende los desafíos a la usurpación de sus asentamientos por empresarios de tierras. A través de estas formas de resistencia los campesinos prepararon el escenario para el desarrollo de la conciencia de clase campesina en épocas posteriores. La historiografía colombiana ha subestimado la importancia de los campesinos en el Siglo XLX en la región Central colombiana debido posiblemente al reducido número de revueltas rurales, hecho que contrasta con la atención que se ha puesto en el estudio de los levantamientos campesinos del siglo XX.

  4. Optimal sizes and siting of nuclear fuel reprocessing plants; Tailles et localisations optimales des usines de retraitement des combustibles nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Thiriet, L.; Deledicq, A. [Commissariat a l' Energie Atomique, Siege (France). Centre d' Etudes Nucleaires

    1967-07-01

    The expansion of a nuclear economy entails the development of fuel process and reprocessing plant programmes. The model proposed makes it possible to select the size, the site and the start-up schedule of the plants in such a way as to minimize the total freight and reprocessing costs. As an illustration, we have approached the problem of burnt natural uranium processing plants related to natural uranium-graphite as nuclear power stations. The sites and annual output of the reactors, the possible plant sites and cost functions (freight and reprocessing) are supposed to be known. The method consists in first approaching the process plant problem as a Dynamic Programming problem, increasing programme slices (total reactor output) being explored sequentially. When the quantities of burnt natural uranium to be reprocessed are fixed, the minimization of the transport cost is then also carried out as a dynamic programming problem. The neighbourhood of the optimum process cost is explored in order to find the minimum summation of a suboptimal processing cost and corresponding optimal transport cost. As the reprocessing problem can be represented on a sequential graph, in order to compute the sub-optima, we developed and used a 'reflexion algorithm'. The method can be interpreted as a general mechanism for determining the optimum when to a sequential dynamic problem (for example an equipment programme) is added a complementary problem (transport, for instance). It also makes it possible to estimate the economic losses which result from the choice of a non optimal policy for other than economic reasons. (author) [French] L'expansion de l'economie nucleaire se traduit par un developpement des programmes d'usines d'elaboration et de retraitement des combustibles. Le modele propose permet de choisir la taille, la localisation et la cadence de mise en service des usines de maniere a minimiser le total des frais de transport et de retraitement. A

  5. Maturação de frutos de seis cultivares de laranjas-doces na Depressão Central do Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    SARTORI IVAR ANTONIO

    2002-01-01

    Full Text Available Objetivando a determinação do período de produção de laranjas no município de Eldorado do Sul, Depressão Central do Rio Grande do Sul, foram avaliados parâmetros de maturação de seis cultivares de laranjeiras-doces. O estudo foi realizado durante 6 anos, de 1992 a 1997, com as cultivares, Rubi, Hamlin, Tobias e Pêra-Rio, durante 4 anos com 'Valência' e 3 anos com 'Folha-Murcha', na coleção de citros da Estação Experimental Agronômica da Universidade Federal do Rio Grande do Sul (UFRGS, situada em Eldorado do Sul-RS, à latitude 30degrees39'S e longitude 51degrees06'W, em solo Podzólico Vermelho Amarelo. Quinzenalmente, com início em abril e término em março, foram colhidas amostras de 20 frutos de 5 plantas de cada cultivar; a coleta de amostras começou no início da mudança de coloração da casca do fruto de verde para amarelo. Após a amostragem, os frutos foram acondicionados em sacos de polietileno e armazenados durante 1 a 5 dias a temperaturas entre 4 e 7masculineC, até serem analisados, para determinação dos teores percentuais da relação suco/bagaço, sólidos solúveis totais (SST, acidez total titulável (ATT e relação SST/ATT. A colheita pode ser iniciada na 2feminine quinzena de abril, com laranjas-'Hamlin' e prolongar-se até a 2feminine quinzena de fevereiro, com laranjas-'Folha-Murcha'. As laranjas-'Hamlin' podem ser colhidas desde a 2feminine quinzena de abril até a 1feminine quinzena de outubro; as laranjas-'Rubi' desde a 1feminine quinzena de maio até a 2feminine quinzena de setembro; as laranjas-'Tobias', desde a 1feminine quinzena de julho até a 1feminine quinzena de novembro; as laranjas-'Pêra-Rio' desde a 2feminine quinzena de agosto até a 1feminine quinzena de fevereiro; as laranjas-'Valência' desde a 2feminine quinzena de agosto até a 1feminine quinzena de janeiro e as laranjas-'Folha-Murcha' desde a 1feminine quinzena de setembro até a 2feminine quinzena de fevereiro.

  6. Extratores e disponibilidade de micronutrientes em Terra Preta de Índio da Amazônia Central Extractants and availability of micronutrients in Central Amazonian dark earth soil

    OpenAIRE

    Adônis Moreira; Wenceslau Geraldes Teixeira; Gilvan Coimbra Martins

    2009-01-01

    O objetivo deste trabalho foi avaliar a disponibilidade de B, Cu, Fe, Mn e Zn em solos com horizonte A antrópico (Terra Preta do Índio - TPI) da Amazônia Central com as soluções extratoras Mehlich 1 (M1), Mehlich 3 (M3) e DTPA-TEA. Foram utilizadas dezesseis amostras de terra preta de diferentes profundidades provenientes de dez sítios arqueológicos e de cinco classes de solos representativas da região (Espodossolo, Neossolo, Latossolo, Argissolo e Cambissolo). Na Terra Preta de Índio, o extr...

  7. Diseño de la Oficina de Proyectos (PMO) para Oleoducto Central S. A.

    OpenAIRE

    Amaya Vanegas, Efraín

    2014-01-01

    En el estado actual de la economía y de la industria colombiana se hace evidente que los proyectos juegan un papel importante en el cumplimento de los objetivos estratégicos de las organizaciones del sector minero-energético -- Para garantizar el éxito de los proyectos, la entidad debe asegurar que las competencias organizacionales sean las apropiadas para el tamaño y complejidad de sus proyectos -- La unidad organizacional con dicha responsabilidad es la Oficina de Proyectos la cual se crea ...

  8. Feeding of Pellona flavipinnis (Clupeiformes, Pristigasteridaein a Central Amazonian floodplain Dieta de Pellona flavipinnis (Clupeiformes, Pristigasteridae em planície alagada da Amazônia Central

    Directory of Open Access Journals (Sweden)

    Sandra S. Moreira-Hara

    2009-06-01

    Full Text Available The feeding habits of Pellona flavipinnis (Valenciennes, 1836 at Catalão, a floodplain area on the Brazilian Central Amazon was studied. Data was obtained during three hydrological cycles, between September 1999 and September 2003. Diet composition, daily and seasonal variation in the feeding activity and the relationship between predator's size and its prey were analyzed. Almost 80% of the food consumed has autochthonous origin and diet was composed basically by insects and fish. Juvenile fish predominated in the stomach contents of all size classes but there was no significant relationship between predator's size and its prey. Pellona flavipinnis may be considered a carnivorous species which feeds mainly on juvenile (young-of-the-year specimens of other fish. More intense feeding activity occurred at night and in the high water period.Os hábitos alimentares de Pellona flavipinnis (Valenciennes, 1836 de uma área de várzea na Amazônia Central, Catalão, foram estudados. Foram utilizados dados referentes a três ciclos hidrológicos, entre setembro de 1999 e setembro de 2003. Foram analisados a dieta, a atividade alimentar diária e sazonal e a relação entre o comprimento da presa e o do predador. Cerca de 80% dos alimentos consumidos eram de origem autóctone e a dieta composta basicamente de insetos e peixes. Peixes juvenis predominaram nos conteúdos estomacais de exemplares de todas as classes de tamanho, mas não houve relação significativa entre o tamanho do predador e o das presas consumidas. Pellona flavipinnis pode ser considerada uma espécie carnívora que se alimenta principalmente de indivíduos juvenis de outras espécies de peixes. A atividade alimentar foi maior durante a noite e no período da cheia.

  9. De-alerting of U.S. nuclear forces: a critical appraisal

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, K C; Barish, F

    1998-08-21

    Since the end of the Cold War, there have been pressures by disarmament advocates to move more quickly to draw down, toward zero, the number of nuclear weapons in U.S. and Russian arsenals. They criticize the process of negotiating arms control agreements as being too slow, and point out that treaty implementation is hampered by the necessity of ratification by the U.S. Senate and Russian Duma. One method of moving more rapidly toward nuclear abolition suggested by some analysts is de-alerting of nuclear-weapon delivery systems. De-alerting is defined as taking steps that increase significantly the time required to launch a given delivery vehicle armed with a nuclear warhead. Although there is little inclination by the U.S. Government to de-alert its nuclear forces at present, some academic literature and press stories continue to advocate such steps. This paper offers a critique of de-alerting proposals together with an assessment of the dangers of accidental, unauthorized, or unintended use of nuclear weapons. It concludes that de-alerting nuclear forces would be extremely de-stabilizing, principally because it would increase the value to an opponent of launching a first strike.

  10. Out of operation in simultaneous way of the two reactors of nucleoelectric central of Laguna Verde(Mexico); Fuera de operacion, de maneira simultanea, los dos reactores de la central nucleoelectrica de Laguna Verde (Mexico)

    Energy Technology Data Exchange (ETDEWEB)

    Mar, Bernardo Salas, E-mail: salasmarb@yahoo.com.mx [Universidad Nacional Autonoma de Mexico, D.F. (Mexico). Facultad de Ciencias. Departamento de Fisica

    2013-11-01

    The two nuclear reactors that Mexico has in the Laguna Verde Nuclear Power Plant, were out of operation simultaneously in September 2012. First it was reported that one of the reactors had problems with the diesel generator, while the other had problems with the nuclear fuel reloading. The day after it was reported a problem related to sediment in the Obra de Toma, place the plant feeds seawater to cool the condenser the depth to which it must operate is 6 meters, with the current level of 1.5 meters, causing a lack of cooling water. Finally it was reported the cause of the suspension of operations, the cracks in jet pumps in both reactors. It is described a brief analysis of these opinions. The reactors are of cooling water of General Electric (BWR-5) and generate 1640 MWe each one.

  11. Dor: aspectos atuais da sensibilização periférica e central Dolor: aspectos actuales de la sensibilización periférica y central Pain: current aspects on peripheral and central sensitization

    Directory of Open Access Journals (Sweden)

    Anita Perpétua Carvalho Rocha

    2007-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As pesquisas recentes têm focalizado a plasticidade bioquímica e estrutural do sistema nervoso decorrente da lesão tissular. Os mecanismos envolvidos na transição da dor aguda para crônica são complexos e envolvem a interação de sistemas receptores e o fluxo de íons intracelulares, sistemas de segundo mensageiro e novas conexões sinápticas. O objetivo deste artigo foi discutir os novos mecanismos que envolvem a sensibilização periférica e central. CONTEÚDO: A lesão tissular provoca aumento na resposta dos nociceptores, chamada de sensibilização ou facilitação. Esses fenômenos iniciam-se após a liberação local de mediadores inflamatórios e a ativação de células do sistema imune ou de receptores específicos no sistema nervoso periférico e central. CONCLUSÕES: As lesões do tecido e dos neurônios resultam em sensibilização de nociceptores e facilitação da condução nervosa central e periférica.JUSTIFICATIVA Y OBJETIVOS: Las recientes investigaciones se han centrado en la plasticidad bioquímica y estructural del sistema nervioso proveniente de la lesión tisular. Los mecanismos involucrados en transición del dolor agudo para crónico son complejos e involucran la interacción de sistemas receptores y el flujo de iones intracelulares, sistemas de segundo mensajero y nuevas conexiones sinápticas. El objetivo de este artículo fue discutir los nuevos mecanismos que envuelven la sensibilización periférica y central. CONCLUSION: La lesión tisular provoca un aumento en la respuesta de los nociceptores, llamada sensibilización o facilitación. Esos fenómenos empiezan después de la liberación local de mediadores inflamatorios y de la activación de células del sistema inmune o de receptores específicos en el sistema nervioso periférico y central. CONCLUSIONES: Las lesiones del tejido y de las neuronas resultan en una sensibilización de nociceptores y en la facilitación de la

  12. Centrality Dependence of Hadron Multiplicities in Nuclear Collisions in the Dual Parton Model

    CERN Document Server

    Capella, A

    2001-01-01

    We show that, even in purely soft processes, the hadronic multiplicity in nucleus-nucleus interactions contains a term that scales with the number of binary collisions. In the absence of shadowing corrections, this term dominates at mid rapidities and high energies. Shadowing corrections are calculated as a function of impact parameter and the centrality dependence of mid-rapidity multiplicities is determined. The multiplicity per participant increases with centrality with a rate that increases between SPS and RHIC energies, in agreement with experiment.

  13. Central depression in nuclear density and its consequences for the shell structure of superheavy nuclei

    CERN Document Server

    Afanasjev, A V

    2005-01-01

    The influence of the central depression in the density distribution of spherical superheavy nuclei on the shell structure is studied within the relativistic mean field theory. Large depression leads to the shell gaps at the proton Z=120 and neutron N=172 numbers, while flatter density distribution favors N=184 for neutrons and leads to the appearance of a Z=126 shell gap and to the decrease of the size of the Z=120 shell gap. The correlations between the magic shell gaps and the magnitude of central depression are discussed for relativistic and non-relativistic mean field theories.

  14. Nuclear fuel cycle facilities in the world (excluding the centrally planned economies)

    International Nuclear Information System (INIS)

    Information on the existing, under construction and planned fuel cycle facilities in the various countries is presented. Some thirty countries have activities related to different nuclear fuel cycle steps and the information covers the capacity, status, location, and the names of owners of the facilities

  15. Caracterización de la zona de alteración Central II, Bloque San Rafael, provincia de Mendoza Characteristics of Central II alteration zone, San Rafael Massif, province of Mendoza

    Directory of Open Access Journals (Sweden)

    M.F. Gargiulo

    2007-09-01

    Full Text Available Se presenta el estudio petrográfico de las muestras de superficie correspondientes a la zona de alteración Central II, localizada en el Bloque San Rafael, provincia de Mendoza (34°54'56" S; 68°37'02" O. La misma está relacionada a la intrusión de un cuerpo hipabisal de composición riolítica alojado en una sucesión de rocas volcánicas y volcaniclásticas de la sección superior del Grupo Choiyoi. La zona de alteración está representada por sericitización generalizada a la que se sobreimponen brechas y venas silíceas, ocasionalmente con textura drusiforme y con bandas tapizadas por agregados diseminados de pirita y calcopirita subordinada, a las que acompaña escasa arsenopirita. Las brechas y venas silíceas conforman una faja de dirección ONO (azimut 290° - 300° e inclinación vertical, en las que se han reconocido texturas de cuarzo hidrotermal de crecimiento primario, de recristalización y de reemplazo. Entre estas texturas se destacan las crustificaciones complejas, el bandeamiento coloforme y los pseudomorfos de cuarzo según calcita en enrejado, a las que se asocia la presencia de adularia con morfologías sub-rómbica, rómbica y pseudo-acicular. Este conjunto de texturas y morfologías permite establecer que se trata de un sistema epitermal de baja sulfuración con paleozonas de ebullición ascendente.The goal of this paper is to present the petrographic study from outcrop samples of the Central II alteration zone. This area is located in the San Rafael Massif, province of Mendoza (34°54'56" S; 68°37'02" O and is related to hypoabyssal rhyolitic bodies that intrude a volcanic-volcaniclastic sequence corresponding to the upper section of Choiyoi Group. The alteration zone is represented by pervasive sericitization overprinted by silicic breccias and veins with WNW trend (Az 290° - 300° and vertical dip. Hydrothermal veins are mainly composed by quartz with primary growth, recrystalization and replacement textures with

  16. International conference on a nuclear-weapon-free zone in central Asia, 15-16 September 1997 Tashkent, Uzbekistan. Building an integral part of the global nuclear security system

    International Nuclear Information System (INIS)

    This Conference is the first fruit of the joint effort by the Central Asian States to counter external threats and challenges. The decision to declare Central Asia a nuclear-weapon-free zone is a further manifestation of the Central Asian States' shared interest in ensuring security, stability and peace for all the inhabitants of the region and in creating the necessary -indeed, the essential- conditions for its sustainable development and prosperity

  17. Riparian leaf litter processing by benthic macroinvertebrates in a woodland stream of central Chile Procesamiento de detritus ripariano por macroinvertebrados bentónicos en un estero boscoso de Chile central

    Directory of Open Access Journals (Sweden)

    CLAUDIO VALDOVINOS

    2001-06-01

    Full Text Available Leaf litter input from riparian landscapes has been identified as both a major energy flow to stream ecosystems and as a food source for stream macroinvertebrates. In riparian landscapes of woodland streams of central Chile, the native deciduous hardwoods are being artificially replaced by exotic coniferous trees at a large spatial scale. It is suggested that this process has a significant impact on the stream communities of central Chile. Today, exotic plantations occur throughout central Chile, with Pinus radiata (D. Don (Monterrey pine accounting for about 80 % of the more than 1,800,000 ha of exotic forests. The objective of this paper was to analyze the effect of the litter beds of a dominant native species (Nothofagus pumilio and an exotic species (P. radiata on the detritus processing carried out by benthic macroinvertebrates, in an experimental catchment of central Chile (Rucúe Creek; 36° 26'00" S, 71° 35'40" W. Results revealed that processing rates of native leaf packs are higher than rates of coniferous leaf packs, suggesting that the replacement of the native hardwoods by exotic coniferous riparian flora has an important impact on the stream energy flow in central Chile. The decay rate coefficients (k were 0.0072 for N. pumilio, and 0.0027 for P. radiata. The greater abundance and biomass of shredders per gram of leaf pack of native Nothofagus would explain the differences in leaf processing rates, especially through the activity of two Plecoptera Gripopterygidae, Limnoperla jaffueli and Antarctoperla michaelseniLa entrada de detritus foliar procedente de áreas riparianas ha sido reconocido como un componente importante en la energética de ecosistemas fluviales y como fuente de alimento de macroinvertebrados acuáticos. En áreas riparianas de esteros boscosos de Chile central los componentes nativos caducifolios están siendo artificialmente reemplazados a gran escala por coníferas exóticas, sugiriendo que este proceso tiene

  18. Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile Variabilidad espacio-temporal en la estructura de gremios ontogenéticos de un ensamble de peces intermareales de Chile central

    Directory of Open Access Journals (Sweden)

    PATRICIA A BERRÍOS

    2011-12-01

    Full Text Available Species resource use can vary throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fishes. However, the influence of the resulting ontogenetic changes in guild membership on the spatio-temporal structure of fish assemblages remains virtually unknown. Here we assessed the spatial and temporal variability in the ontogenetic feeding guild (OFG structure of the fish assemblage inhabiting the temperate rocky intertidal zone along central Chilean coast. This was done applying principal component analysis (PCA and randomization tests (R-test on the relative OFG composition of fish assemblages, obtained from seasonal samples from ten pools located at two heights in the intertidal zone in three localities between 33° and 34° S. Overall, the PCA and R-tests suggest that spatial variability dominated over temporal variability in OFG structure, mainly due to a higher representation of omnivore species at high intertidal pools in two of the three sampled localities. However, phenology-related changes in the representation of fish size-classes (i.e. carnivore recruitment in spring-summer along with ontogenetic differences in habitat selection (e.g., selection for low intertidal pools by bigger-sized carnivore OFG contributed to both spatial and temporal differentiation in OFG structure. Finally, the relative representation of each OFG correlated with that of their dominant species, without evidence for density compensation. This suggests low levels of functional redundancy among species in each OFG, highlighting the vulnerability of assemblage functioning to size-biased disturbances as fishing.El uso de los recursos puede variar a través de la ontogenia, afectando potencialmente las dinámicas comunitarias. Esto puede ser de particular importancia en especies que enfrentan alta

  19. Leptospirosis en el Perú: III Encuesta serológica en el Mercado Central de Lima

    Directory of Open Access Journals (Sweden)

    Arístides Herrer

    1960-01-01

    Full Text Available Se ha realizado una encuesta serológica acerca de la leptospirosis en 112 personas que trabajan en el Mercado Central de abastos de la ciudad de Lima, mercado donde las ratas (Rattus norvegicus están altamente infectadas por la Leptospira icterohaemorrhagiae. Se usó la reacción de aglutinación-lisis y 11 cepas serológicas de leptospiras, obteniendo los siguientes resultados: 1. Frente al antígeno de la L. canicola Ruebush, los sueros correspondientes a tres personas reaccionaron a títulos de 1:100, 1:300 y 1:1,000, respectivamente. 2. Con el antígeno de la L. icterohaemorrhagiae AB Wijnberg se obtuvo algunas reacciones positivas sólo a la dilución de 1:10, lo que también se observó en algunos casos con los antígenos de L. ballum S102, L. hyos y L. pomona S91. 3. Desde que los autores consideran positivos sólo a los casos que muestran anticuerpos a diluciones del suero de 1:100 o mayor, es difícil explicar la falta de relación entre la alta infección de las ratas por la L. icterohaemorrhagiae y la ausencia de anticuerpos para la L. icterohaemorrhagiae AB Wijnberg en la sangre de las personas que trabajan en el Mercado Central de Lima.

  20. Estudio de inclusiones fluidas de las mineralizaciones epitermales de Ag.Baritina.metales de base de Hiendelaencina y de Baritina de Atienza (Sistema Central Español

    Directory of Open Access Journals (Sweden)

    Oyarzun, R.

    1991-08-01

    Full Text Available Fluid inclusion studies on quartz and barite samples from the Hiendelaencina Ag-base metals epithermal deposit (late Hercynian suggest that this mineralization was formed during four hydrothermal stages. Ore stage I was characterized by aqueous-carbonic fluids from which pyrite and arsenopyrite were precipitated. The interaction between probably magmatic-derived fluids (aqueous solutions; Th = 320 – 200º C, 12 eq. wt. % NaCl and meteoric waters (of lower temperature and salinity caused a generalized decrease in both, T and salinity (from 12 eq. wt. % NaCl to 3 eq. wt. % NaCl, thus probably inducing the precipitation of Cu and Zn minerals (ore stage 11. Ore stage 111 (silver stage was characterized by the interaction between fluids of low temperature and contrasted salinities (Th = 100 – 150º C; 3 eq. wt. % NaCl to 18-22 eq. wt. % NaCl. A final and «barren stage » (stage IV resulted in the precipitation of a late generation of quartz and barite.Estudios de inclusiones fluidas en muestras de cuarzo y baritina del yacimiento epitermal argentífero de Hiendelaencina sugieren que esta mineralización se formó a lo largo de cuatro episodios hidrotermales. El estadio mineral I estuvo caracterizado por la presencia de fluidos acuoso-carbónicos que precipitaron pirita y arsenopirita. La interacción entre fluidos de probable origen magmático (soluciones acuosas; Th = 320 – 200º C, 12 % eq. NaCl y fluidos de origen meteórico (de menor temperatura y salinidad causó un decrecimiento generalizado en T y salinidad (desde 12 % eq. NaCl a 3 % eq. NaCl, lo cual probablemente indujo la precipitación de minerales de Cu y Zn (estadio mineral 11. El estadio mineral 111 (estadio argentífero se caracterizó por la interacción entre fluidos de baja temperatura pero de salinidades contrastadas (Th = 100 – 150º C; 3 % eq. NaCl a 18-22 % eq. NaCl. Un estadio final y estéril (estadio mineral IV originó la precipitación de