WorldWideScience

Sample records for nucleares da comissao

  1. 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.

  2. 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.

  3. 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.

  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 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.

  6. Development of a model for strategic evaluation of the global performance of the Brazilian Nuclear Energy Commission; Desenvolvimento de um modelo para avaliacao estrategica do desempenho global da Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Staude, Fabio

    2003-07-01

    A conscious, effective course of action, now essential to several areas and organizations, has become a must in the public administration. In this sense, modem managerial practices may contribute significantly for governmental organism to take up an attitude shifted to results in the society, without losing its eminently public function. In order to measure the social impact of the activities of the State as a whole, institutions must use mechanisms that allow self-evaluations of their performance, so as to verify the return obtained as a result of their efforts. However, most institutions do not have structured tools for such evaluation. The present study proposes to the Comissao Nacional de Energia Nuclear a model to measure its global performance, offering a proposed architecture for the measurement system in accordance with the results of the planning process of the Institution. The methodology presented also comprises the definition of cause-and-effect critical models between the strategic objectives of the organization and its respective factors critic ai for success, as well as related performance indicators. This work also includes the breakdown of the measurement system for the macro processes of the organization, optimizing resource sharing and the flow of information, avoiding redundant efforts and bringing forth further advantages aiming at creating a organizational 'unit'. Within this context, the developed model may offer substantial help for the improvement of the maturity of the organization in goal-oriented management, considering that the proposed global performance measurement follows a planned structure, with a systemic approach of the organization, allowing that the process be carried out in a way that is transparent and objective. (author)

  7. Portfolio of patents after the Brazilian Innovation Act: the case of the Comissao Nacional de Energia Nuclear - CNEN (Brazilian National Nuclear Energy Commission)

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Gustavo Jose; Guimaraes, Regia Ruth Ramirez; Perry, Katia da Silva Peixoto, E-mail: pereira@cdtn.br, E-mail: rrrg@cdtn.br, E-mail: kspp@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Teruya, Dirceu Yoshikazu, E-mail: teruya@inpi.gov.br [Instituto Nacional da Propriedade Industrial (INPI), Rio de Janeiro, RJ (Brazil)

    2013-07-01

    The process of technological development is due to the need to promote a solution to a particular problem of agents, compete with products and/or processes on the international market and to promote scientific advancement. Thus, the patent system is a repository of knowledge for protection, for promotion of diffusion through licensing agreements and an indicator of technological development. In 2004, the Brazilian Government enacted the Brazilian Innovation Act and the mechanisms were improved for cooperation between firms and public education, science and technology organisations and also promoted the commercialisation of technology produced by public education, science and technology organisations and the mandatory establishment of Technology Transfer Offices. The Comissao Nacional de Energia Nuclear (CNEN) is a federal agency responsible for basic and applied research in the field of nuclear technology and has used the patent system since the 1980s to protect its knowledge. With the advent of the Innovation Act in 2004, there was a significant boost in requests for patents in CNEN which also established an internal set of normative acts and created a System of Innovation Management and Technology Innovation Offices in its research institutes to support management and dissemination of knowledge. The aim of this case study is to present the profile of the requests for patents by CNEN before and after the enactment of the Brazilian Innovation Act covering the period of time between 1980 and 2010. (author)

  8. Impact of the marketing activities related to service offer an the Nuclear Information Center of the brazilian National Nuclear Energy Commission; Impacto das atividades de marketing relativas a promocao de servicos no Centro de Informacoes Nucleares da Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Amaral, Sueli Angelica do

    1998-12-31

    Exploratory field research confirms the marketing administration philosophy in Nuclear Information Center (CIN) of National Commission of Nuclear Energy (CNEN), analyzing marketing activities referring to SONAR-INIS (current awareness) and SERVIR-INIS (provision of copies) promotion, in order to evaluate the impact of these activities relating to the use of the services by real users. The data collecting took place using a technique of documental analysis, semi-structured interviews with five managers of the Center, simple no-participant observation accomplished by the researcher in CIN, questionnaires about the administration philosophy applied to the managers, and questionnaires sent by mail to 176 users of the international sample. The 122 users`answers (69,31% of answers rate) were analyzed according to the statistical procedures of Statistical Package of Social Sciences (SPSS), with 0,05% of error margin, and 95% of confidence level. Nine assumptions of research were tested. It was concluded that: the first knowledge of the services was by circulars or letters; SONAR-INIS was not considered as the principal service by its information contents in order to develop professional activities by 60,5% of the users; SERVIR-INIS was considered the main service to access the documents related to the interest of 47,8% of the user; to the majority the most important reason to use both services was the convenience and facilities to access the services; suitability of interest was the most important criterion in order to accomplish the appropriate service; the CIN inquiry frequency to know about users` satisfaction level, their information interests, needs and expectation in order to adapt information offer to demand was irregular and seldom; CIN`s concerns about knowing users` critics, complaints and suggestions was recognized by users; the majority of the users was interested in receiving information about the benefits of the services; the price of the copies obtained in

  9. Strangeness in nuclear matter at DA{Phi}NE

    Energy Technology Data Exchange (ETDEWEB)

    Gianotti, P. [INFN, Laboratori Nazionali di Frascati, Rome (Italy)

    1998-01-01

    The low energy kaons from the {phi} meson produced at DA{Phi}NE offer a unique opportunity to study strangeness in nuclear matter. The interaction of kaons with hadronic matter can be investigated at DA{Phi}NE using three main approaches: study of hypernuclei production and decay, kaons scattering on nucleons, kaonic atoms formation. These studies explore kaon-nucleon and hyperon-nucleon forces at very low energy, the nuclear shell model in presence of strangeness quantum number and eventual quarks deconfinement phenomena. The experiments devoted to study this physical program at DA{Phi}NE are FINUDA and DEAR. The physics topics of both experiments are illustrated together with a detailed descriptions of the two detectors.

  10. O espaço da energia nuclear no Brasil

    Directory of Open Access Journals (Sweden)

    Joaquim Francisco de Carvalho

    2012-01-01

    Full Text Available Este artigo repassa a história e descreve a experiência acumulada em energia nuclear no Brasil, mostrando que as aplicações biomédicas, industriais e agrícolas desenvolveram-se bem no país, a partir dos anos 1950. Em seguida, o artigo demonstra que o país pode cobrir seu consumo de energia elétrica apenas com fontes renováveis de energia, sem recorrer a usinas nucleares de potência. Por fim, são analisados os argumentos comuns na imprensa, a favor e contrários às centrais nucleares, e são discutidos alguns aspectos comerciais e políticos do problema. São também examinadas as estratégias de vendas da indústria nuclear no Brasil.This article reviews the history and describes the experience on nuclear energy in Brazil, showing that nuclear technology applied to biomedical sciences, industry and agriculture has been largely developed in this country, from the year 1950 on. Then the paper shows that Brazil can cover its electricity consumption with only renewable energy sources, without nuclear power plants. Finally the arguments usually employed in the press, pro and against nuclear power plants are analyzed and some commercial and political aspects of the problem are commented. The sales strategy of the nuclear industry in Brazil is also commented.

  11. Intercomparison of activity measures of 1 {sup 31}I, {sup 67}Ga and {sup 201}Tl in nuclear medicine services in Recife/PE; Intercomparacao de medidas de atividade de {sup 131}I, {sup 67}Ga e {sup 201}Tl em servicos de medicina nuclear do Recife/PE

    Energy Technology Data Exchange (ETDEWEB)

    Couto, Iris Tairini V. do, E-mail: iristairini@hotmail.com [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco (IFPE), Recife, PE (Brazil); Fragoso, Maria da Conceicao de F.; Oliveira, Mercia Liane de, E-mail: mercial@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2013-07-01

    In this work, we intend to evaluate the performance of radionuclide calibrators of the Nuclear Medicine Services of the Recife (Brazil), the measurement procedures used by the professionals of these services and the frequency of the application of quality control testing required by Comissao Nacional de Energia Nuclear (CNEN) and the Agencia Nacional de Vigilancia Sanitaria (ANVISA), performing an intercomparison of radionuclides measurements.

  12. Uma breve história da política nuclear brasileira

    OpenAIRE

    Kuramoto, Renato Yoichi Ribeiro; UEL - Paraná; Appoloni, Carlos Roberto; UEL - Párana

    2002-01-01

    Na década de 30, surgiram as primeiras pesquisas na área nuclear no Brasil. Entretanto, somente a partir de 1945, com a explosão da bomba atômica em Hiroshima, o governo brasileiro passa a demonstrar interesse em tal setor. Desde então, em meio a controvérsias quanto ao uso da energia nuclear para fins bélicos, a busca sistemática pelo domínio da tecnologia nuclear, direcionada a uma hegemonia brasileira na América Latina, marcaram os 54 anos seguintes da história da polí...

  13. O espaço da energia nuclear no Brasil

    OpenAIRE

    Joaquim Francisco de Carvalho

    2012-01-01

    Este artigo repassa a história e descreve a experiência acumulada em energia nuclear no Brasil, mostrando que as aplicações biomédicas, industriais e agrícolas desenvolveram-se bem no país, a partir dos anos 1950. Em seguida, o artigo demonstra que o país pode cobrir seu consumo de energia elétrica apenas com fontes renováveis de energia, sem recorrer a usinas nucleares de potência. Por fim, são analisados os argumentos comuns na imprensa, a favor e contrários às centrais nucleares, e são dis...

  14. Ionizing radiation dose control for workers in a nuclear plant working with unsealed sources; Controle da dose de radiacao ionizante para trabalhadores em uma instalacao radiativa com fontes nao seladas

    Energy Technology Data Exchange (ETDEWEB)

    Gerulis, Eduardo

    2006-07-01

    With the liberation of the use of the nuclear energy for peaceful applications, International Commission Radiological Protection, ICRP, founded in 1928, created a system of protection of the undesirable doses of ionizing radiation in 1958. This has been received by workers, members of the public and environment and hence it became possible for the introduction of these applications. This protection system is adopted by the International Agency of Energy Atomic, IAEA, that publishes recommendations in safety series, 88 and by the Comissao Nacional de Energia Nuclear, CNEN, which publishes these regulations. The international recommendations and national regulations were adapted and they need to be applied in this way. The present paper uses recommendations of the publication 75 from ICRP, of the publication 115 from 88 and regulations of the regulation NN 3.01 from CNEN to present, through radiological protection measures, the ionizing radiation dose control for workers in a nuclear plant that works in the research, production, division and packing of unsealed sources to be used in clinical applications. In that way it is possible to prevent appropriately the undesirable doses and to confirm the received doses. (author)

  15. Benefits of using nuclear energy; Os beneficios do uso da energia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Lira, Elda Vilaca

    2015-11-01

    The purpose of this work is to present, especially for high school students, the benefits of the use of nuclear energy, promoting a deeper knowledge of this technology, encouraging critical thinking of students and society around them.

  16. Os deletérios impactos da crise nuclear no Japão

    Directory of Open Access Journals (Sweden)

    Paulo Marques

    2012-01-01

    Full Text Available O artigo aborda o acidente nuclear no Japão em 11 de março de 2011. Em decorrência do terremoto seguido de tsunami, foram danificados três dos seis reatores existentes no complexo Daiichi-Fukushima. Ocorreram explosões, seguidas da liberação de materiais radiativos ao meio ambiente. São mostrados os efeitos danosos nos casos da exposição do homem a radiações. Comenta-se a existência do principal nó górdio da geração nucleoelétrica, que é a produção do indescartável lixo atômico.This work reports the severe nuclear incident occurred in Japan on March 11, 2011, due a earthquake followed by tsunami, where three of six existing reactors in Daiichi-Fukushima were damaged. The explosions with releasing of radioactive materials to environment have been discussed. It has shown the harmful effects of radiations to the exposed human being. Besides, the existence of the main impediment of the nuclear electric generation represented by production of non-disposable atomic waste has been discussed.

  17. Characterization of a 65 kDa NIF in the nuclear matrix of the monocot Allium cepa that interacts with nuclear spectrin-like proteins.

    Science.gov (United States)

    Pérez-Munive, Clara; Blumenthal, Sonal S D; de la Espina, Susana Moreno Díaz

    2012-01-01

    Plant cells have a well organized nucleus and nuclear matrix, but lack orthologues of the main structural components of the metazoan nuclear matrix. Although data is limited, most plant nuclear structural proteins are coiled-coil proteins, such as the NIFs (nuclear intermediate filaments) in Pisum sativum that cross-react with anti-intermediate filament and anti-lamin antibodies, form filaments 6-12 nm in diameter in vitro, and may play the role of lamins. We have investigated the conservation and features of NIFs in a monocot species, Allium cepa, and compared them with onion lamin-like proteins. Polyclonal antisera against the pea 65 kDa NIF were used in 1D and 2D Western blots, ICM (imunofluorescence confocal microscopy) and IEM (immunoelectron microscopy). Their presence in the nuclear matrix was analysed by differential extraction of nuclei, and their association with structural spectrin-like proteins by co-immunoprecipitation and co-localization in ICM. NIF is a conserved structural component of the nucleus and its matrix in monocots with Mr and pI values similar to those of pea 65 kDa NIF, which localized to the nuclear envelope, perichromatin domains and foci, and to the nuclear matrix, interacting directly with structural nuclear spectrin-like proteins. Its similarities with some of the proteins described as onion lamin-like proteins suggest that they are highly related or perhaps the same proteins.

  18. [The nuclear matrix proteins (mol. mass 38 and 50 kDa) are transported by chromosomes in mitosis].

    Science.gov (United States)

    Murasheva, M I; Chentsov, Iu S

    2010-01-01

    It was shown by immunofluorescence method that serum M68 and serum K43 from patients with autoimmune disease stain interphase nuclei and periphery of mitotic chromosomes of pig kidney cells. Western blotting reveals the polypeptide with mol. mass of 50 kDa in serum M68, and the polypeptide with mol. mass of 38 kDa in serum K43. In the nuclear protein matrix, the antibodies to protein with mol. mass of 38 kDa stained only nucleolar periphery, while the antibodies to the protein with mol. mass of 50 kDa stained both the nucleolar periphery and all the interphase nucleus. It shows that among all components of nuclear protein matrix (lamina, internuclear network, residual nucleoli) only nucleolar periphery contains the 38 kDa protein, while the 50 kDa protein is a part of residual nucleolar periphery and takes part in nuclear protein network formation. In the interphase cells, both proteins were in situ localized in the nuclei, but one of them with mol. mass of 50 kDa was in the form of small clearly outlined granules, while the other (38 kDa) was in the form of small bright granules against the background of diffusely stained nuclei. Both proteins were also revealed as continuous ring around nucleolar periphery. During all mitotic stages, the 50 kDa protein was seen on the chromosomal periphery as a cover, and the 38 kDa protein formed separate fragments and granules around them. After nuclear and chromosome decondensation induced by hypotonic treatment, both antibodies stain interphase nuclei in diffuse manner, but in mitotic cells they stained the surface of the swollen chromosomes. The polypeptide with mol. mass of 50 kDa maintained strong connection with chromosome periphery both in norm and under condition of decondensation induced by hypotonic treatment and at subsequent recondensation in isotonic medium. In contrast, the protein with mol. mass of 38 kDa partially lost the contact with a chromosome during recondensation appearing also in the form of granules in

  19. Obstacles to the nuclear technology development in Brazil: from the beginning of atomic age to the Brazil-Germany Nuclear Agreement; Entraves ao desenvolvimento da tecnologia nuclear no Brasil: dos primordios da era atomica ao Acordo Nuclear Brasil-Alemanha

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, Tharsila Reis de

    2005-07-01

    This paper intends to comprehend the Brazilian social actors' efforts applied to the nuclear energy control, from the beginning of Atomic Age to Brazil-Germany Nuclear Agreement. It tries to demonstrate that the limits of The Brazilian nuclear development in this period derive from the capitalist development dynamics in Brazil and from the absence of continuity on the motivations of its nuclear policy. (author)

  20. Brazil and the nuclear issues in the years of the Luiz Inácio Lula da Silva government (2003-2010

    Directory of Open Access Journals (Sweden)

    Carlo Patti

    2010-01-01

    Full Text Available The present article is an analysis of Brazilian nuclear diplomacy and of the international relevance of the national nuclear program adopted during the two Presidential terms of Luiz Inácio Lula da Silva. Particular attention will be given to the Brazilian position in the agreement on nuclear non-proliferation, to the role of mediation between Iran and the nuclear powers, and finally to the national ambitions concerning the industrial and military uses of the nuclear technologies.

  1. The situation of the nuclear energy in the world; A situacao da energia nucleoeletrica no mundo

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Jair Albo Marques de [and others

    1996-12-01

    This work presents an overview of the nuclear energy in the world. It approaches the following main topics: kinds of nuclear power plants; operation experience of the nuclear plants; environmental and social aspects of the nuclear energy; economic aspects of the nuclear energy; development of the reactors technology and supply of the nuclear fuel.

  2. Availability analysis of the nuclear instrumentation of a research reactor; Analise da disponibilidade da instrumentacao nuclear de um reator de pesquisa

    Energy Technology Data Exchange (ETDEWEB)

    Vianna Filho, Alfredo Marques

    2016-07-01

    The maintenance of systems and equipment is a central question related to Production Engineering. Although systems are not fully reliable, it is often necessary to minimize the failure occurrence likelihood. The failures occurrences can have disastrous consequences during a plane flight or operation of a nuclear power plant. The elaboration of a maintenance plan has as objective the prevention and recovery from system failures, increasing reliability and reducing the cost of unplanned shutdowns. It is also important to consider the issues related to organizations safety, especially those dealing with dangerous technologies. The objective of this thesis is to propose a method for maintenance analysis of a nuclear research reactor, using a socio-technical approach, and focused on existing conditions in Brazil. The research reactor studied belongs to the federal government and it is located in the city of Rio de Janeiro. The specific objective of this thesis is to develop the availability analysis of one of the principal systems of the research reactor, the nuclear instrumentation system. In this analysis, were taken into account not only the technical aspects of the modules related to nuclear instrumentation system, but also the human and organizational factors that could affect the availability of the nuclear instrumentation system. The results showed the influence of these factors on the availability of the nuclear instrumentation system. (author)

  3. The deleterious effects of the nuclear crisis in Japan; Os deleterios impactos da crise nuclear no Japao

    Energy Technology Data Exchange (ETDEWEB)

    Marques, Paulo, E-mail: pmarx@iq.usp.br [Universidade de Sao Paulo (USP), SP (Brazil)

    2012-07-01

    This work reports the severe nuclear incident occurred in Japan on March 11, 2011, due a earthquake followed by tsunami, where three of six existing reactors in Daiichi-Fukushima were damaged. The explosions with releasing of radioactive materials to environment have been discussed. It has shown the harmful effects of radiations to the exposed human being. Besides, the existence of the main impediment of the nuclear electric generation represented by production of non-disposable atomic waste has been discussed. (author)

  4. Nuclear magnetic resonance of D(-)-{alpha}-amino-benzyl penicillin; Ressonancia magnetica nuclear da D(-)-{alpha}-amino-benzil penicilina

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, Monica R.M.P.; Gemal, Andre L.; San Gil, Rosane A.S. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Quimica; Menezes, Sonia M.C. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas

    1995-12-31

    The development of new drugs from penicillins has induced the study of this substances by nuclear magnetic resonance. Several samples of D(-)-{alpha}-amino-benzyl penicillin were analysed using {sup 13} C NMR techniques in aqueous solution and solid state. Spectral data of this compounds were shown and the results were presented and analysed 7 figs., 4 tabs.

  5. Calculation methods of reactivity using derivatives of nuclear power and Filter fir; Metodos para o calculo da reatividade usando derivadas da potencia nuclear e o filtro FIR

    Energy Technology Data Exchange (ETDEWEB)

    Diaz, Daniel Suescun

    2007-07-01

    This work presents two new methods for the solution of the inverse point kinetics equation. The first method is based on the integration by parts of the integral of the inverse point kinetics equation, which results in a power series in terms of the nuclear power in time dependence. Applying some conditions to the nuclear power, the reactivity is represented as first and second derivatives of this nuclear power. This new calculation method for reactivity has special characteristics, amongst which the possibility of using different sampling periods, and the possibility of restarting the calculation, after its interruption associated it with a possible equipment malfunction, allowing the calculation of reactivity in a non-continuous way. Apart from this reactivity can be obtained with or without dependency on the nuclear power memory. The second method is based on the Laplace transform of the point kinetics equations, resulting in an expression equivalent to the inverse kinetics equation as a function of the power history. The reactivity can be written in terms of the summation of convolution with response to impulse, characteristic of a linear system. For its digital form the Z-transform is used, which is the discrete version of the Laplace transform. In this method it can be pointed out that the linear part is equivalent to a filter named Finite Impulse Response (Fir). The Fir filter will always be, stable and non-varying in time, and, apart from this, it can be implemented in the non-recursive way. This type of implementation does not require feedback, allowing the calculation of reactivity in a continuous way. The proposed methods were validated using signals with random noise and showing the relationship between the reactivity difference and the degree of the random noise. (author)

  6. Risks perception and the public acceptance of nuclear technology; Percepcao de riscos e a aceitacao publica da tecnologica nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Walter Mendes [Instituto de Radioprotecao e Dosimetria, Rio de Janeiro, RJ (Brazil)]. E-mail: wmendes@ird.gov.br; Gavazza, Sergio; Estrada, Julio J.S. [Instituto Militar de Engenharia, Rio de Janeiro, RJ (Brazil)

    2000-07-01

    This work establishes a methodology to evaluate the public acceptance of nuclear technology taking into consideration several risk concepts. Basic concepts of the nuclear science were transmitted, in form of lectures and courses, to the 13,439 Goiania residents, after the closing of the decontamination works, caused by the violation of the source of {sup 137}Cs, of a teletherapy machine, in 1987. The results of the indicators shown that public's individuals perceive radiation risks and develop behaviors according to a constructive outline. The public does not know technical terms, being quite influenced by media, from where gets information of interest. The public orders the risks, relating them to accidents according to subjective criteria and models them as unknown, new and not observed at short period, establishing destruction, environmental catastrophe and diseases images. (author)

  7. Information dissemination in nuclear energy: ideology, speech and language; Divulgacao da informacao em energia nuclear: ideologia, discurso e linguagem

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Marcos Goncalves

    1992-07-01

    The social impact of Goiania nuclear accident is analysed from a semiotic investigation upon papers issued on popular magazines, newspapers and scientific periodicals. Also the communication of Science Information is discussed through three basic models: diffusionist, bibliometric and cultural perspectives. Divulgation and diffusion process of scientific information are reviewed on the bases of theory of representation and theory of sign. The relationship between energy and society is discussed though a compared analysis upon the information sources available to public and scientific community. (author)

  8. Quality assessment of radiopharmaceuticals in nuclear medicine services at Northeast states, Brazil; Avaliacao da qualidade de radiofarmacos em servicos de medicina nuclear de estados da regiao nordeste

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Wellington Gomes de

    2012-07-01

    The radiopharmaceuticals are used in the field nuclear medicine services (NMS) as tracer in the diagnoses and treatment of many diseases. Radiopharmaceuticals used in nuclear medicine and usually have a minimum of pharmacological effect. The procedures for labelling Radiopharmaceuticals should be observed in order to minimize risks to patients, employees and individuals from the public, and to be administered in humans, must be sterile and free of pyrogens and possess elements all measures of quality controls required a conventional drug. The 'Agencia Nacional de Vigilancia Sanitaria (ANVISA)' in its 'Resolucao de Diretoria Colegiada' (RDC) No. 38 of June 4{sup th} 2008, decided that the NMS must perform quality control in the generators eluate and radiopharmaceuticals according to recommendations of manufacturers and scientific evidence accepted by ANVISA. Thus, this study proposes to evaluate the quality of the generator {sup 99M}o-{sup 99m}Tc eluate and radiopharmaceuticals labeled with {sup 99m}Tc used in most NMS of some states in the Northeast, in relation to radionuclide, chemical, radiochemical purity and pH and promote the inclusion of procedure for quality control of radiopharmaceuticals in routine NMS. The results show that 90% radionuclidic purity, 98.2% purity chemical and radiochemical purity of 46% and 100% of the eluates are in agreement with international pharmacopoeias; already radiopharmaceuticals showed 82.6% purity and all radiochemical pH values are also in accordance with international pharmacopoeias. Even with so many positive results, staff the majority of MNS was not able to perform the quality control of the eluates and radiopharmaceuticals. Showing the importance of implementing of quality control programs of the eluates and radiopharmaceuticals in nuclear medicine. (author)

  9. Evaluation of integrity of radiation sources of nuclear gauges; Avaliacao da integridade de fontes radioativas de medidores nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Torohate, Wiclif Francisco

    2016-11-01

    Nuclear equipment meters are mainly used in the industry in quality control and process control. The principle of operation consists in a shielded radioactive source together with a radiation detector such that the radiation interacts with the material to be analyzed before reaching the detector, providing real time data. Can be as their fixed and mobile mobility, the unique properties of ionizing radiation are used in three basic modes, transmission, backscatter or dispersion or induced (reactive). With the advancement and technological modernization in the world, the demand for nuclear gauges becomes increasingly larger. Currently in Brazil there are about 465 process control plants and 21 portable systems and Mozambique about 45 facilities using nuclear gauges. This font registration is done through a process called source inventory that allows also to know the category of the source, the danger or risk to human health that the source offers. The handling of this equipment requires personnel, certified, skilled and well trained in radiation protection area in accordance with the requirements of the various CNEN Rules. Due to the presence of radioactive source and because these devices are used by workers risk because there external radiation. In this context, we made the smear test in two fixed meters from the IRD industry laboratory, which determines the integrity of the source package, mandatory item in periodic integrity testing of the radiation source of this type of device. A set of procedures is made for its implementation as an evaluation of the radiological risk by radiological survey. It was intended to contribute to the learning handling and safe use of these meters. (author)

  10. A proactive method for safety management in nuclear facilities; Um metodo proativo para gerenciamento da seguranca em instalacoes nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Grecco, Claudio Henrique dos Santos; Carvalho, Paulo Victor Rodrigues de; Santos, Isaac Antonio Luquetti dos, E-mail: grecco@ien.gov.br, E-mail: paulov@ien.gov.br, E-mail: luquetti@ien.gov.br [Instituto de Engenharia Nuclear (IEN/CNEN/RJ), Rio de Janeiro, RJ (Brazil). Div. de Instrumentacao e Confiabilidade Humana

    2014-07-01

    Due to the modern approach to address the safety of nuclear facilities which highlights that these organizations must be able to assess and proactively manage their activities becomes increasingly important the need for instruments to evaluate working conditions. In this context, this work presents a proactive method of managing organizational safety, which has three innovative features: 1) the use of predictive indicators that provide current information on the performance of activities, allowing preventive actions and not just reactive in safety management, different from safety indicators traditionally used (reactive indicators) that are obtained after the occurrence of undesired events; 2) the adoption of resilience engineering approach in the development of indicators - indicators are based on six principles of resilience engineering: top management commitment, learning, flexibility, awareness, culture of justice and preparation for the problems; 3) the adoption of the concepts and properties of fuzzy set theory to deal with subjectivity and consistency of human trials in the evaluation of the indicators. The fuzzy theory is used primarily to map qualitative models of decision-making, and inaccurate representation methods. The results of this study aim an improvement in performance and safety in organizations. The method was applied in a radiopharmaceutical shipping sector of a nuclear facility. The results showed that the method is a good monitoring tool objectively and proactively of the working conditions of an organizational domain.

  11. Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu

    Energy Technology Data Exchange (ETDEWEB)

    Genezini, Frederico Antonio

    2004-07-01

    The {sup 155}Eu nuclide was investigated by the directional angular correlation technique following the {beta} decay of {sup 155}Sm. The angular correlation measurements were carried out using a setup with 4 Ge detectors and a multi parametric data acquisition system. To perform the data analysis a new methodology was developed . The multipole mixing ratios of twenty sixty {gamma}- transitions were determined. Seven of them agreed with the results of earlier angular correlation studies and nineteen obtained for the first time confirmed the multipolarity suggested in earlier electron capture studies. Besides, the spin of the level at 1106.83 keV as well as the parity of the level at 1301.41 keV have also been suggested. The nuclear structure of {sup 155}Eu was discussed successfully in terms of the single particle model using a deformed Woods-Saxon potential plus residual pairing interaction permitting the description of the rotational quasi-proton band heads. (author)

  12. Management of radioactive wastes of iodine therapy; Gerenciamento de rejeitos radioativos da iodoterapia

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Andre R.M.; Santos, Helena C., E-mail: andrerichard88@bol.com.br [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco (IFPE), Recife, PE (Brazil)

    2015-07-01

    The main objective of waste radioactive management is to ensure the protection of man and the preservation of the environment. The regulation that established the basis for the good radioactive waste management was elaborated by the Comissao Nacional de Energia Nuclear (CNEN), in 1985. It is the CNEN-NE-6:05: 'Management radioactive waste in radioactive facilities', which although it an important standard related to radioactive waste management and help largely in the design of a management system in radioactive facilities of radioisotope users, covers the topics in a general way and does not consider individuals aspects of the different plants, as is the case of nuclear medicine units. The main objective of this study is to show the segregation and safe packaging, avoiding unnecessary exposure of professionals involved and public individuals in general.

  13. Em nome da autonomia e do desenvolvimento: Brasil e a não-proliferação, o desarmamento e os usos pacíficos da energia nuclear

    Directory of Open Access Journals (Sweden)

    Diego Santos Vieira de Jesus

    2012-01-01

    Full Text Available O objetivo é examinar as posições defendidas pelo Brasil quanto à não-proliferação, ao desarmamento e aos usos pacíficos da energia nuclear neste início de século. O argumento central aponta que o Brasil almeja pressionar os Estados nuclearmente armados para que cumpram suas obrigações de desarmamento, enquanto procura preservar a autonomia para desenvolver atividades nucleares pacíficas.   The objective is to examine the positions adopted by Brazil on nuclear non-proliferation, disarmament and peaceful uses of nuclear energy in the beginning of this century. The central argument indicates that Brazil aims to pressure the nuclear-weapon states to fulfill their disarmament obligations, while seeks to preserve autonomy to develop peaceful nuclear activities.

  14. Aspects of public opinion research in risk perception studies covering the nuclear field

    Energy Technology Data Exchange (ETDEWEB)

    Tanimoto, Katia Suemi; Hiromoto, Goro, E-mail: ktanimoto@ipen.b, E-mail: hiromoto@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-07-01

    A project for site selection and construction of a national radioactive waste repository is underway at the Comissao Nacional de Energia Nuclear. Public acceptance is determinant to the deployment of an undertaking of this size. A major concern regarding the use of nuclear energy are the problems related to safe management of the radioactive waste. For effective communication between decision makers and the public, a mutual understanding of views, as well as attitudes towards risk, is needed. The use of opinions polls is necessary in order to achieve it. This work aims to point out the major aspects to be approached by an opinion poll for the study of risk perception on the candidate regions for repository construction. A risk perception research model is presented, to be applied to the case of radioactive waste disposal, along with theoretical support to the organization and implementation of its structure. (author)

  15. 70-kDa Heat Shock Cognate Protein hsc70 Mediates Calmodulin-dependent Nuclear Import of the Sex-determining Factor SRY*

    Science.gov (United States)

    Kaur, Gurpreet; Lieu, Kim G.; Jans, David A.

    2013-01-01

    We recently showed that the developmentally important family of SOX (SRY (sex determining region on the Y chromosome)-related high mobility group (HMG) box) proteins require the calcium-binding protein calmodulin (CaM) for optimal nuclear accumulation, with clinical mutations in SRY that specifically impair nuclear accumulation via this pathway resulting in XY sex reversal. However, the mechanism by which CaM facilitates nuclear accumulation is unknown. Here, we show, for the first time, that the 70-kDa heat shock cognate protein hsc70 plays a key role in CaM-dependent nuclear import of SRY. Using a reconstituted nuclear import assay, we show that antibodies to hsc70 significantly reduce nuclear accumulation of wild type SRY and mutant derivatives thereof that retain CaM-dependent nuclear import, with an increased rate of nuclear accumulation upon addition of both CaM and hsc70, in contrast to an SRY mutant derivative with impaired CaM binding. siRNA knockdown of hsc70 in intact cells showed similar results, indicating clear dependence upon hsc70 for CaM-dependent nuclear import. Analysis using the technique of fluorescence recovery after photobleaching indicated that hsc70 is required for the maximal rate of SRY nuclear import in living cells but has no impact upon SRY nuclear retention/nuclear dynamics. Finally, we demonstrate direct binding of hsc70 to the SRY·CaM complex, with immunoprecipitation experiments from cell extracts showing association of hsc70 with wild type SRY, but not with a mutant derivative with impaired CaM binding, dependent on Ca2+. Our novel findings strongly implicate hsc70 in CaM-dependent nuclear import of SRY. PMID:23235156

  16. Corrosão de liga 800GN em ambiente do circuito secundário da Central Nuclear de Angra 2

    OpenAIRE

    Fabio Abud Mansur

    2015-01-01

    A liga 800GN (grau nuclear) é um material utilizado na fabricação de geradores de vapor para reatores de água pressurizada (PWR) de usinas nucleares devido à sua elevada resistência à corrosão. A resistência à corrosão da liga 800GN é devida ao caráter protetor da película de óxido formada na superfície do tubo em contato com a água pressurizada à alta temperatura. No entanto, a corrosão tem sido a principal causa de falhas nos tubos dos geradores de vapor de usinas nucleares. Os problemas ge...

  17. Application of the probe Horiba U-23 in the analysis of physical-chemical parameters of groundwater influences on the Osamu Utsumi uranium mine in Caldas-MG; Aplicacao da sonda Horiba U-23 na analise de parametros fisico-quimicos das aguas subterraneas sobre influencia da mina de uranio Osamu Utsumi em Caldas-MG

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Flavio H.S., E-mail: flaviohsmoreira2@gmail.com [Universidade Federal de Alfenas (UNIFAL), Pocos de Caldas, MG (Brazil); Alberti, Heber L.C.; Silva, Nivaldo C., E-mail: heber@cnen.gov.br, E-mail: ncsilva@cnen.gov.br [Comissao Nacional de Energia Nuclear (LAPOC/CNEN-MG), Pocos de Caldas, MG (Brazil). Laboratorio de Pocos de Caldas; Fleming, Peter Marshall, E-mail: pmf@cnen.gov.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, BH (Brazil)

    2013-07-01

    This study presents data on the analysis of physical-chemical parameters of groundwater in the uranium mine Osamu Utsumi, belonging to the Industrias Nucleares do Brasil - INB, in the municipality of Caldas. This work is part of the team responsible for the evaluation of Plano de Recuperacao de Areas Degradadas (PRAD), team consists of researchers from Laboratorio de Pocos de Caldas - LAPOC and of the Centro de Desenvolvimento Tecnologico Nuclear - CDTN, units of the Comissao Nacional de Energia Nuclear - CNEN. Sampling was carried out in eleven wells in the 'bota-fora 4' area and digs mine. Analyses of groundwater quality were performed using the multiparameter probe Horiba U23, recent acquisition of LAPOC. The results characterize the groundwater of ten wells monitored as acidic and with a high electrical conductivity, due to the impacts caused by drainage Mining Acid (DAM)

  18. Extreme meteorological events and nuclear facilities safety; Fenomenos meteorologicos extremos e a seguranca das instalacoes nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Patricia Moco Princisval

    2006-07-01

    An External Event is an event that originates outside the site and whose effects on the Nuclear Power Plants (NPP) should be considered. Such events could be of natural or human induced origin and should be identified and selected for design purposes during the site evaluation process. This work shows that the subtropics and mid latitudes of South America east of the Andes Mountain Range have been recognized as prone to severe convective weather. In Brazil, the events of tornadoes are becoming frequent; however there is no institutionalized procedure for a systematic documentation of severe weather. The information is done only for some scientists and by the newspapers. Like strong wind can affect the structural integrity of buildings or the pressure differential can affect the ventilation system, our concern is the safety of NPP and for this purpose the recommendations of International Atomic Energy Agency, Nuclear Regulatory Commission and Comissao Nacional de Energia Nuclear are showed and also a data base of tornadoes in Brazil is done. (author)

  19. The 21.5-kDa isoform of myelin basic protein has a non-traditional PY-nuclear-localization signal

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Graham S.T.; Seymour, Lauren V. [Molecular and Cellular Biology, University of Guelph, Guelph, Ontario (Canada); Boggs, Joan M. [Molecular Structure and Function, Research Institute, Hospital for Sick Children, and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario (Canada); Harauz, George, E-mail: gharauz@uoguelph.ca [Molecular and Cellular Biology, University of Guelph, Guelph, Ontario (Canada)

    2012-06-15

    Highlights: Black-Right-Pointing-Pointer Full-length 21.5-kDa MBP isoform is translocated to the nucleus. Black-Right-Pointing-Pointer We hypothesized that the exon-II-encoded sequence contained the NLS. Black-Right-Pointing-Pointer We mutated this sequence in RFP-tagged constructs and transfected N19-cells. Black-Right-Pointing-Pointer Abolition of two key positively-charged residues resulted in loss of nuclear-trafficking. Black-Right-Pointing-Pointer The 21.5-kDa isoform of classic MBP contains a non-traditional PY-NLS. -- Abstract: The predominant 18.5-kDa classic myelin basic protein (MBP) is mainly responsible for compaction of the myelin sheath in the central nervous system, but is multifunctional, having numerous interactions with Ca{sup 2+}-calmodulin, actin, tubulin, and SH3-domains, and can tether these proteins to a lipid membrane in vitro. The full-length 21.5-kDa MBP isoform has an additional 26 residues encoded by exon-II of the classic gene, which causes it to be trafficked to the nucleus of oligodendrocytes (OLGs). We have performed site-directed mutagenesis of selected residues within this segment in red fluorescent protein (RFP)-tagged constructs, which were then transfected into the immortalized N19-OLG cell line to view protein localization using epifluorescence microscopy. We found that 21.5-kDa MBP contains two non-traditional PY-nuclear-localization signals, and that arginine and lysine residues within these motifs were involved in subcellular trafficking of this protein to the nucleus, where it may have functional roles during myelinogenesis.

  20. Use of thin layer chromatography for the determination of radiochemical purity of radiopharmaceuticals in nuclear medicine services of Paraiba and Rio Grande do Norte, Brazil; Utilizacao da cromatografia em camada delgada para determinacao da pureza radioquimica de radiofarmacos em servicos de medicina nuclear da Paraiba e Rio Grande do Norte, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, W.G.; Santos, P.A.L.; Lima, F.R.A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Programa de Pos-Graduacao em Tecnologia Energetica; Lima, F.F., E-mail: wellington.gandrade@gmail.com [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2012-07-01

    The paper chromatography and the thin layer chromatography are separation techniques in which the radioactive components migrate because of their affinity with the eluent (mobile phase) or stationary phase, respectively. In radiopharmaceuticals labeled with {sup 99m}Tc, besides its own radiopharmaceutical, {sup 99m}TcO{sup 4-} free and TcO{sub 2} can be identified and quantified. The evaluation of radiochemical purity of radiopharmaceuticals is essential to produce images free of artifacts as well as avoid unnecessary absorbed dose to the patient. Once they are managed in humans it is important and necessary that they undergo to strict quality control. Because of this, ANVISA in its 'Resolucao da Diretoria Colegiada (RDC) 38 of June 4th, 2008 states the obligation of performing a minimum of tests in nuclear medicine services routine prior to human administration. This work evaluated, by the method of thin layer chromatography (TLC), radiochemical purity, determined the pH of the radiopharmaceutical DEXTRAN- 500, DMSA, DTPA, PHYTATE, MDP, MIBI and Sn-Col used in nuclear medicine services in the states of Paraiba and Rio Grande do Norte - Brazil. The results show that the use of thin layer chromatography (TLC) as a standard method in routine of nuclear medicine services is possible, because it provides important data for the evaluation of radiochemical purity, allowing the exclusion of a radiopharmaceutical poorly marked. (author)

  1. Assessment of decision making models in sensitive technology: the nuclear energy case; Avaliacao de modelos decisorios em tecnologia sensivel: o caso da energia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Eduardo Ramos Ferreira da [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)]. E-mail: erfsilva@ipen.br

    2007-07-01

    In this paper a bibliographic review is proceeded on the decision making processes approaching the sensitive technologies (the military and civilian uses as well), and the nuclear technology herself. It is made a correlation among the development of the nuclear technology and the decision making processes, showing that from 70 decade on, such processes are connected to the national security doctrines influenced by the Brazilian War College. So, every time that the national security is altered, so is the master line of the decision making process altered. In the Brazil case, the alteration appeared from the World War II up to the new proposals coming out from the Ministry of Defense are shown related to the nuclear technology. The existent models are analysed with a conclusion that such models are unveiling at the present situation of the moment, concerning to the nuclear technology.

  2. The role of nuclear energy in brazilian energy matrix: socioeconomic and environmental aspects; O papel da energia nuclear na matriz energetica brasileira: aspectos socioeconomicos e ambientais

    Energy Technology Data Exchange (ETDEWEB)

    Schirmer, Priscila

    2016-09-01

    With the large increase of energy demand in the world, either for the continued expansion of industrialization, or by the raise of consumption, are increasing the need for energy sources diversification and the search for cleaner alternatives of energy production. Nuclear power has been considered as an option to curb the emission of greenhouse gases and reduce the dependence of fossil fuels. However, nuclear energy is an issue that still causes a lot of doubt and questions, turning the development of this work very important for a better understanding of the lay public as well as to contribute and encourage future research through an assessment of their environmental and socio-economic aspects, discussing the risks, benefits, and an assessment of the expansion of nuclear energy use, including an overview of nuclear energy in Brazil. Concluding that nuclear energy can contribute to the expansion of the Brazilian energy matrix, as the only heat source able to ensure constant supply of energy without emitting greenhouse gases. Considering that Brazil dominates the technology of the nuclear fuel cycle, and has a large reserves of uranium. A larger share of nuclear energy in the Brazilian energy matrix can generate greater diversification of the same, valuing the environmental and economic sustainability of the country and reducing the system's vulnerability. However, nuclear generation should not be considered as the only solution to the energy problems of the country, but make a part of it by the combination with other renewable sources, increasing the diversity and energy security of the country. (author)

  3. Metrological aspects in the estimate of the administered activity in nuclear medicine patients; Aspectos metrologicos na estimativa da atividade administrada em pacientes de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ruzzarin, A.; Iwahara, A.; Tahuata, L., E-mail: anelise@bolsista.ird.gov.br [Instituto de Radioprotecao e Dosimetria, (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil), Lab. Nacional de Metrologia das Radiacoes Ionizantes; Xavier, A.M. [Comissao Nacional de Energia Nuclear (ESPOA/CNEN-RS), Porto Alegre, RS (Brazil). Escritorio de Porto Alegre

    2014-07-01

    In order to investigate the performance quality of routine measurements of Nuclear Medicine Services (NMS), the National Metrology Laboratory of Ionizing Radiation/Institute of Radiation Protection and Dosimetry (LNMRI/IRD) has been conducting, since 1998, a program of comparison for activity measurements of radiopharmaceuticals administered to patients in nuclear medicine. Correction factors are determined from the result of performance analysis in order to determine with better accuracy the activity to be administered to the patients. (author)

  4. The waste originating from nuclear energy peaceful applications and its management; Os rejeitos provenientes de aplicacoes pacificas da energia nuclear e o seu gerenciamento

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Jair Albo Marques de [E-mail: jairalbo at ax.apc.org (Brazil)] [and others

    1997-05-01

    This work presents the waste originating from nuclear energy and its management. It approaches the following main topics: nature and classification of the wastes; security requirements to the waste management; state of the art related to the wastes derivates of the uses of the nuclear energy; wastes in the fuel cycle; wastes of the industrial, medical and research and development applications; costs of the waste management.

  5. The internationalization of nuclear industry: state and capital in atomic relations; A internacionalizacao da industria nuclear: estado e capital em relacoes atomicas

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira Junior, Evaristo Santiago

    1986-03-15

    This paper analyzes the causes and scope of the nuclear energy diffusion process in the capitalist world. It also aims at explaining Brazil's role in this process. The study contemplates two main concepts that are, here, considered to be driving and directing vectors: the World Capital and the Capitalist State. According to the expanded reproduction logic, World Capital forms the world nuclear productive subsystem, which commands and directs, in this process, hundreds (or thousands) of productive units, regardless of their geographical location, nationality or capital control. Thru the utilization of available public intervention tools, the Capitalist state has favored the formation of the world nuclear productive subsystem, thus guiding the accumulation process in the interior of this system. Therefore, the conclusion of the Nuclear Cooperation Agreement between Brazil and Germany and the resultant establishment of the Brazilian Nuclear Program (following the authoritarian model of public administration), is well fitted in the general dynamics of subordination/articulation of the Brazilian economy to the world economy and, particularly, to the world nuclear productive subsystem. (author)

  6. Assinatura da deposição atmosférica de testes nucleares em sedimentos da costa brasileira (240+239Pu e 137Cs

    Directory of Open Access Journals (Sweden)

    Christian J. Sanders

    2012-01-01

    Full Text Available The aim of this review is to take a look at Cold War era nuclear tests signatures found in Brazilian coastal sediments. Both137Cs and 240+239Pu signatures have been documented in mangrove, coastal mudflats and continental shelf sediments, associated with above ground nuclear tests beginning in the 1950's. The dates associated to the anthropogenic radionuclide signatures 137Cs and 240+239Pu along sediment columns are confirmed by 210Pb geochronology in many of the studies highlighted in this review. The results outlined in this review characterize the extent to which nuclear fallout products reach the Brazilian coast in quantities sufficient for detection, allowing the use of these radioisotopes as geochronometers.

  7. Encouraging the radiation protection practice; Incentivando a pratica da radioprotecao

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Natanael O.; Cunha, Paulo C.N., E-mail: natanfisio@hotmail.com, E-mail: paulo.cunha@hotmail.com [Universidade Estadual de Ciencias da Saude de Alagoas (UNCISAL), Maceio, AL (Brazil); Junior, Jose N.S.; Silva, Jessyca B., E-mail: nobertsilva@hotmail.com, E-mail: Jessyca.bs@hotmail.com [Escola Tecnica de Saude de Santa Barbara, Arapiraca, AL (Brazil)

    2013-07-01

    The radiological protection of workers occupationally exposed to ionizing radiation (X-ray diagnoses, Nuclear Medicine, Radiotherapy and Dental) is essential to minimize the appearance of radiation effects. The ways to reduce the potential for exposure of workers are: Time, Distance , and Shielding. The most important purpose of radiation protection is to provide safe conditions for activities involving ionizing radiation, basic safety conditions that must be observed in professional practice. The professional must have full knowledge of the subject and deepen in the revision of norms and guidelines related to radiation protection establish by the Vigilancia Sanitaria - ANVISA, and Comissao Nacional de Energia Nuclear - CNEN, Brazil. The study was conducted in a technical school for the Technical Training Course in Radiology, where the students are invited to think deeply about the radiation protection of themselves, the patients and the environment. Developed since July 2012, with the participation of 30 students, with a leading class -three teachers assisting in the development of the project . With this project there was an awareness of both students, as instructors stage accompanying the daily lives of students and their own colleagues. Following the same objective in 2013 the project continues with more adept at radioprotection.

  8. Study of the effect of irradiation of Mo targets at nuclear reactor; Estudo do efeito da irradiacao de alvos contendo Mo em reator nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Nieto, Renata C.; Lima, Ana Lucia V.P.; Silva, Nestor C. da; Osso Junior, Joao Alberto [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    2000-07-01

    The most used radioisotope in nuclear medicine is {sup 99m}Tc, in the {sup 99}Mo-{sup 99m}Tc generator form. {sup 99}Mo can be produced by several nuclear reactions in reactors and cyclotrons. The cyclotron production is not technically and economically viable. The production in the reactor can be done in two different ways: by the fission of {sup 235}U and by the {sup 98}Mo(n,{gamma}){sup 99}Mo reaction. A project for the production of {sup 99}Mo by the activation of Mo and the preparation of gel type generators is under development at the 'Instituto de Pesquisas Energeticas e Nucleares'. In the present work, the radionuclidic impurities produced in the activation of MoO{sub 3} , metallic Mo and Mo Zr gel were evaluated, as well as the radionuclidic purity of {sup 99m}Tc eluted from generators prepared. (author)

  9. Procedures, activities and doses in nuclear medicine cycle in Brazil; Procedimentos, atividades e doses no ciclo da medicina nuclear no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Silvia Maria Velasques de

    2005-07-01

    With the aim of characterizing nuclear medicine procedures performed in Brazil, activities of radiopharmaceuticals used and effective doses to patients, data was collected from nuclear medicine institutions in three regions of the country, namely the Southeast, the Northeast and the South regions, representing public hospitals, university hospitals, private and philanthropic institutions with low, medium and high levels of consumption of radiopharmaceuticals. The three chosen regions are responsible for 92% of radiopharmaceutical consumption and imaging equipment in the country. Accordingly, it was requested of some participating institutions to fulfill manually from individual patients data, to record gender, age, weight, height and activities used, for each type of exam as well as the equipment used. In others, the researcher collected data personally. Per institution, nuclear medicine diagnostic procedures ranged from 700 to 13,000 per year, most of which are myocardial and bone imaging procedures, and imaging equipment ranged, from 1 to 8 machines, one or two head SPECT's (hybrid or not). 26.782 patients protocols were analysed, 24.371 adults and 2.411 children and teenagers. For adult patients, differences were observed in the amount of activities used in diagnostic procedures between public and private institutions, with lower average activities used in public institutions. Activities administered to children and their effective doses were difficult to evaluate due to the incompleteness of individual records. Appropriate individual patient records could be adopted without affecting hospitals routine and contributing for a comprehensive evaluation of the radiation protection of nuclear medicine patients. Data from 8.881 workers were analysed, 346 working at nuclear medicine institutions. For monitored workers and measurably exposed workers in nuclear medicine, the values 2.3 mSv and 5.4 mSv, respectively, for effective annual doses are greater than data

  10. Nuclear option: analysis of the actual status and future perspectives for Brazilian case; Opcao nuclear: analise da situacao atual e perspectivas

    Energy Technology Data Exchange (ETDEWEB)

    Bastos, Wilma S.

    1996-12-31

    This report presents a global view of actual status and future perspectives of Brazilian nuclear option. By diversity of subjects treated in it, the difficulties are appointed at each chapter, when necessary. The strategies are focused in details in chapters 7 and 8. In chapter 10 they are emphasized in its main aspects for Brazilian case. To give an overview of the state-of-the-art related to nuclear energy, many figures and references are presented in the Annex. 104 refs., 111 figs.

  11. Pertinencia de la gammagrafía de tiroides en un servicio de medicina nuclear de referencia del oriente colombiano / Pertinence of Thyroid Scan in a Nuclear Medicine Department in Eastern Colombia / Relevância da cintilografia da tireóide em um centro de referência de medicina nuclear no leste colombiano

    Directory of Open Access Journals (Sweden)

    Liset Sánchez-Ordúz, MD.

    2015-03-01

    used in the study of thyroid diseases. It is recommended to perform it in patients presenting thyrotoxicosis, thyroid nodules with indeterminate cytology and when diagnosing ectopic thyroid. Our objective was to determine the pertinence of ordering thyroid scan in a nuclear medicine department in eastern Colombia. Methodology: Observational, retrospective, and cross-sectional descriptive study. Thyroid scans including relevant variables performed in the nuclear medicine department at Carlos Ardila Lulle hospital were evaluated during 3 consecutive months. The indication of the study, academic background of physician requesting the test, patient’s gender, concomitant presence of TSH with its respective value, and intake of Levothyroxine before test. Test results were also taken into account. Results: Out of the 277 performed scans, 244 (88% were women. 67% of them were not correctly indicated, and 32% of these patients were taking hormonal supplements, which was suspended 25 days before performing the test. General practitioners and consultants without specialization in endocrinology have a 9.08 and 9.37 probability respectively, of not indicating correctly the thyroid scan compared to endocrinologists. Conclusions: Two out of 3 thyroid scans performed in a nuclear medicine department in Eastern Colombia are not correctly indicated, producing a big impact in public health. [Sánchez-Orduz L, Wandurraga-Sánchez EA, García RE, Camacho PA. Pertinence of Thyroid Scan in a Nuclear Medicine Department in Eastern Colombia. MedUNAB 2015; 17(3: xx-xx]. Introdução: A cintilografia da tireóide é um teste muito usado no estudo de doenças da glândula tireóide. O monitoramento é recomendado em doentes com tireotoxicose, nódulos de tireóide com citologia indeterminada e suspeita de tireóide ectópica. Objetivo: Nosso objetivo foi determinar a pertinência do pedido de cintilografia da tireóide em um centro de referência de medicina nuclear no leste da Col

  12. Recover of the nuclear energy: strategic option and technological innovation - vision 2005; Retomada da energia nuclear: opcao estrategica e inovacao tecnologica - visao 2005

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Marcio Soares; Mattos, Joao Roberto Loureiro de; Vasconcelos, Vanderley de [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)]. E-mails: jrmattos@cdtn.br; marciod@cdtn.br; vasconv@cdtn.br; Jordao, Elizabete [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Faculdade de Engenharia Quimica

    2006-07-01

    Considering the projections for the electric power demand, forecasted to first 25 years of the 21 century, and the technological innovations under demonstration in the mitigation of radioactive wastes, the nuclear option was included on a definitive way in the agenda of the countries as an environmental, economic and political acceptable option.

  13. Solution for the nuclear reactor point-kinetics problem via decomposition method; Solucao via metodo da decomposicao do problema de cinetica puntual de um reator nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Vargas, Rubem Mario Figueiro [Pontificia Univ. Catolica do Rio Grande do Sul, Porto Alegre, RS (Brazil). Faculdade de Engenharia. Dept. de Engenharia Quimica]. E-mail: rvargas@pucrs.br; Vilhena, Marco Tullio de [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Matematica]. E-mail: vilhena@mat.ufrgs.br; Cardona, Augusto Vieira [Pontificia Univ. Catolica do Rio Grande do Sul, Porto Alegre, RS (Brazil). Faculdade de Matematica]. E-mail: acardona@pucrs.br

    2005-07-01

    The decomposition method is a mathematical technique, usually, applied to solve nonlinear problems, but can be an effective procedure for analytical solution of linear problems presenting advantages when compared with others techniques. In this work, an analytical solution for the nuclear reactor point-kinetics equations is developed using the decomposition method. (author)

  14. Treze passos para o juízo final: a nova era do desarmamento nuclear dos Estados Unidos e da Rússia Thirteen steps to judgement day: the new era of Russian and North American nuclear disarmament

    Directory of Open Access Journals (Sweden)

    Diego Santos Vieira de Jesus

    2008-08-01

    Full Text Available Este artigo procura explicar por que os líderes dos EUA e da Rússia não implementaram total e efetivamente o plano de ação de treze pontos práticos para o desarmamento nuclear, estabelecido na Conferência de Revisão do Tratado de Não-Proliferação Nuclear em 2000. As decisões relacionadas aos treze pontos, tomadas pelos membros dos Executivos das duas maiores potências nucleares, são vistas como resultado da conciliação de imperativos internos e externos por esses indivíduos, que enfrentam oportunidades e dilemas estratégicos distintos simultaneamente nos âmbitos doméstico e internacional. São consideradas as escolhas políticas de membros dos Executivos nacionais e estrangeiros, Legislativos e principais grupos de interesse desses países, bem como a distribuição de poder sobre a formulação da decisão nacional, estabelecida pelas instituições políticas domésticas. As hipóteses apontam que os membros dos Executivos desses países - apoiados por grande parte dos membros dos Legislativos e dos principais grupos de interesse envolvidos, como as Forças Armadas - procuraram garantir autonomia para definir a estrutura e a composição de forças estratégicas e táticas, modernizar arsenais atômicos e operar uma força capaz de lidar com contingências que envolvam não apenas potências nucleares tradicionais, mas principalmente novos Estados detentores de armas de destruição em massa e organizações terroristas.This article aims to explain why U.S. and Russian leaders have not implemented totally and effectively the thirteen practical-step plan of action on nuclear disarmament agreed at the 2000 Nuclear Non-Proliferation Treaty Review Conference. The decisions with regard to the thirteen steps, taken by members of U.S. and Russian Executives, are seen as the result of the conciliation of internal and external imperatives by those individuals, who face distinctive strategic opportunities and dilemmas simultaneously

  15. A digital method for period measurements in a nuclear reactor; Um metodo digital para medidas de periodo em um reator nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Mundim, Sergio Gorretta

    1971-02-15

    The present paper begins by giving a theoretical treatment for the nuclear reactor period. The conventional method of measuring the period is analysed and some previously developed digital methods are described. The paper criticises the latter, pointing out some deficiencies which the proposed process is able to eliminate. All errors connected with this process are also analysed. The paper presents suitable solutions to reduce them to a minimum. The total error is found to he less than the error presented by the other methods described. A digital period meter is designed with memory resources and an automatic scaler changer. Integrated circuits specifications are used in it. Real time experiments with nuclear reactors were made in order to check te validity of the method. The data acquired were applied to a simulated digital period meter implemented in a general purpose computer. The nuclear part of the work was developed at the 'Comissao Nacional de Energia Nuclear' and the simulation work was dane at the 'Departamento de Calculo Cientifico' of COPPE, which also advised the author in the completion of this thesis. (author)

  16. L'uso pacifico dell'energia nucleare da Ginevra 1955 ad oggi : il caso italiano : atti del convegno

    CERN Document Server

    2007-01-01

    Energia e sviluppo (le fonti energetiche) ; l'Italia e l'opzione nucleare ; stato a prospettive delle tecnologie nucleari ; reattori nucleari di nuova generazione ; tecniche nucleari in biologia, medicina biochimica, agraria e beni culturali ; sicurezza e ambiente.

  17. Sustainability indicators for innovation and research institutes of nuclear area in Brazil; Indicadores de sustentabilidade para institutos de pesquisa e inovacao da area nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Alves, S.F.; Barreto, A.A.; Rodrigues, P.C.H.; Feliciano, V.M.D., E-mail: sfa@cdtn.br, E-mail: aab@cdtn.br, E-mail: pchr@cdtn.br, E-mail: vmfj@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2016-11-01

    Indicators are relevant tools for measuring sustainability process. In this study, the relevance of sustainability indicators appropriate for research and innovation institutes in Brazil is discussed. As reference for case study, nuclear research and innovation institutes were chosen. Sixty-nine sustainability indicators were considered. Some of these indicators were obtained from lists in the literature review, distributed between the dimensions environmental, economic, social, cultural and institutional. The other indicators were developed through discussions between professionals from nuclear, environmental, economic, social and cultural areas. Among the investigated indicators, 32 were selected as being the most relevant. Discrepancies were found during the analysis the opinions of the experts in relation to sustainability dimensions proposed. (author)

  18. Evaluation of poly(vinylpyrrolidone) and collagen by Low Field Nuclear Magnetic Resonance Spectroscopy; Avaliacao da polivinilpirrolidona e do colageno por ressonancia magnetica nuclear de baixo campo

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Paula de M.; Tavares, Maria I.B. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Macromoleculas Professora Eloisa Mano]. E-mail: pmcosta@ima.ufrj.br

    2005-07-01

    Blends of natural and synthetic polymers represent a new class of materials with better mechanical properties and biocompatibility than those of the single components. Collagen and poly(vinylpyrrolidone) are well known for their important biological properties. The blending of collagen with poly(vinylpyrrolidone) makes it possible to obtain new materials in which strong interactions between the synthetic and biological components occur. Do to the excellent biocompatibility of these polymers, this blend has been much studied intending biomedical applications. And a one technique that can provide important information on molecular mobility, compatibility and even evaluate the interactions that can occur with these polymers is the Low Field Nuclear Magnetic Resonance Spectroscopy. Thus, the purpose of this work is to evaluate collagen and poly(vinylpyrrolidone) by Low Field Nuclear Magnetic Resonance Spectroscopy. From the values of relaxation times obtained, we can conclude that these materials have different interactions, and different mobility domains, confirming the heterogeneity and complexity of these materials. (author)

  19. The Nuclear program of Navy: an approach from the budget; O programa nuclear da Marinha: uma abordagem a partir do orcamento

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Marco Antonio

    2014-07-01

    After the initiatives arising in the 50s, to conduct scientific research in Brazil, in the nuclear sector, the Brazilian government decided to invest resources in the early '70s, to provide the country with full training in the nuclear fuel cycle, producing reactors research and power and reprocessing of spent nuclear fuel in the reactors. This course of action was intended to guarantee the necessary to make stronger our energy matrix, with the use of natural resources (uranium and thorium mines whose reserves are among the largest in the world) for the production of electricity, within view particularly development programs in effect at the time. Meanwhile, the Navy of Brazil, identifying the need to operate nuclear-powered submarines in the security and defense of the South Atlantic, institutionalized in 1979, a nuclear program which aimed to the complete domination independently of the nuclear cycle. Since then, what is realized is that the trajectory of the development of this program, in addition to external difficulties imposed by countries holders of this technology, budget internal issue became relevant. The irregularity of financial transfers caused the delay and the lack of guarantees of future budgets led to the unpredictability of strategic planning, leading the program to the 'vegetative' state for nearly a decade. However, from the 2000s, the possibility of economic exploitation by the expansion of the Brazilian Continental Shelf and the new discoveries of oil in the pre-salt tier shifted the vision balance then attributed to the use of nuclear technology as an energy source only, or intended for research and development in areas such as health and agriculture, reinforced the argument that Brazil must have this technology to 'discourage the concentration of hostile forces within the limits of Brazilian territorial waters'. In this context, the paper describes and analyzes how the Navy Nuclear Program (PNM) amounted to the

  20. Development of the Track-Etch neutron radiography technique; Desenvolvimento da tecnica da radiografia com neutrons pelo metodo do registro de tracos nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Assuncao, Marlete Pereira Meira

    1992-12-31

    The track etch method was employed in the Neutron Radiography Technique (NR). A combination between the Solid State Nuclear Track Detectors, Makrofol-E and CN-85, with a natural boron converter screen was used as image detector. A NR facility was designed in the Nuclear Physics Division of the IPEN-CNEN/SP and is installed at the radial beam-hole 8 of the 2 MW pool type IEA-R1 Nuclear Research Reactor which provides a neutron flux at the sample position of about 3 x 10{sup 6} n/s.cm{sup 2}. The chemical etching in the Makrofol-E and CN-85 detectors were performed in a PEW solution (15% KOH, 40% ethyl alcohol and 45% water) at 70{sup 0} C and in a Na OH 10% solution at 60{sup 0} C respectively. In order to determine the radiographic conditions, the following parameters were investigated: track diameter, track production rate, characteristics curves, resolution and sensitivity for some materials. The obtained results shown that the best contrast and resolution ({approx} 20 {mu}m) were achieved for the smallest track diameter (1,4 {mu}m) and for exposures ranging from 2 X 10{sup 9} n/cm{sup 2} to 2 X 10{sup 10} n/cm{sup 2} (Makrofol-E) and from 9 X 10{sup 8} n/cm{sup 2} to 2 X 10{sup 10} n/cm{sup 2} (CN-85). For both detectors, and for the present facility, the minimal discernible thickness was determined and its value is about 0,3 mm. The present results were compared with those reported in the literature and their behavior and influence in the radiography image were evaluated accordingly the recent theory concerning the image formation process in SSNTD. (author). 60 refs., 26 figs., 5 tabs.

  1. Expressão nuclear do P53 em carcinoma de células transicionais da bexiga Nuclear expression of P53 protein in transitional cell carcinoma of the bladder

    Directory of Open Access Journals (Sweden)

    José Anastácio Dias Neto

    2002-01-01

    Full Text Available OBJETIVO: Investigar a expressão imuno-histoquímica da p53 com fator de risco em carcinoma de células transicionais da bexiga (CCT. MÉTODOS: Foram estudados restrospectivamente 90 pacientes com CCT com idade média de 71 anos: G1 - 45, G2 - 29, G3 - 16, pTa-1 - 62 e pT2-4 - 28. Entre os pacientes com tumores não invasivos houve recidiva vesical em 35 casos (55,5%. Os tumores superficiais foram tratados por ressecção trans-uretral associados ao BCG (>G1, e os invasivos por cistectomia radical. O tempo médio de seguimento dos pacientes foi de 55 meses e 25 deles faleceram da doença. A expressão imuno-histoquímica foi estudada em peças preservadas em formol 10% e blocos de parafina pelo método da avidina-biotina-imunoperoxidase. Considerou-se p53 positivo o tumor com índice de marcação nuclear superior a 10%. RESULTADOS: A expressão da p53 mostrou associação com o grau do tumor e com o estádio da lesão primária (p=0,01, mas não com o tamanho do tumor vesical (p=0,25 ou com a taxa de recidiva dos tumores superficiais (p=0,81. Houve forte correlação entre o padrão de marcação da p53 com metástases (p=0,002 e com a sobrevida dos pacientes (p=0,003. CONCLUSÃO: A expressão da p53 mostrou valor preditivo para grau tumoral, estádio, incidência de metástases e sobrevida dos pacientes, mas não para recidiva vesical dos tumores superficiais.OBJECTIVE: To investigate the immunoexpression of p53 protein as a risk factor in transitional cell carcinoma of the bladder (TCC. METHODS: We analyzed retrospectively 90 patients with TCC and mean age of 71 years: G1 - 45, G1 - 29, G3 - 16, pTa-1 - 62 and pT2-4 - 28. The superficial TCC were treated TUR plus intravesical BCG (>G1, and the invasives by radical cystectomy and urinary diversion. The mean time of followup was 55 months and 25 patients died of the disease. The rate or reccurence in superficial tumors was 55.5%. The p53 immunoexpression was determined in formalin fixed

  2. 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

  3. Metrological aspects in estimating of radiation dose in patients of nuclear medicine; Aspectos metrologicos na estimativa da dose efetiva de pacientes em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ruzzarin, Anelise

    2015-06-01

    In order to investigate the performance of routine measurements in nuclear medicine services, LNMRI/IRD has been conducting, since 1998, a comparison program of activity measurements of radiopharmaceuticals administered to patients in nuclear medicine. Correction factors are determined from the result of performance analysis in order to determine with better accuracy the activity to be administered to the patients. The present study shows how the correction factor is determined by the ratio between the measurement of the activity at the nuclear medicine center and the activity determined by the LNMRI, which is adopted as reference. It is essential that the dose calibrator be calibrated with standards traceable to national metrology laboratories, so that the activity administered to the patient is neither greater nor smaller than the appropriate value. The corrected values of the activities can be used to calculate with greater accuracy the effective doses received by the patients as well as the risk of cancer. Information related to radiopharmaceuticals and administered activities, type of exams and patient data of three Brazilian hospitals were collected for 1496 adults and 134 children submitted to diagnostic exams employing {sup 99m}Tc and {sup 131}I. Results showed up to a considerable difference between the administered activity and the corrected activity until 30% and 13% above the reference value, respectively, for the {sup 131}I and {sup 99m}Tc was detected. The consequences of these differences were not very critical in this study since the activity measured in dose calibrator before administration was lower than the corrected activity, thus causing a lower effective dose in patients. However, this reduction in activity may result in problems in obtaining the image and consequently, failure diagnosis, delaying correct diagnosis. On the other hand, the overestimation would be worse, mainly in therapeutic applications, because an unnecessarily high absorbed

  4. Thermohydraulic simulation of HTR-10 nuclear reactor core using realistic CFD approach; Simulacao termohidraulica do nucleo do reator nuclear HTR-10 com o uso da abordagem realistica CFD

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Alexandro S.; Dominguez, Dany S., E-mail: alexandrossilva@gmail.com, E-mail: dsdominguez@gmail.com [Universidade Estadual de Santa Cruz (UESC), Ilheus, BA (Brazil); Mazaira, Leorlen Y. Rojas; Hernandez, Carlos R.G., E-mail: leored1984@gmail.com, E-mail: cgh@instec.cu [Instituto Superior de Tecnologias y Ciencias Aplicadas, La Habana (Cuba); Lira, Carlos Alberto Brayner de Oliveira, E-mail: cabol@ufpe.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2015-07-01

    High-temperature gas-cooled reactors (HTGRs) have the potential to be used as possible energy generation sources in the near future, owing to their inherently safe performance by using a large amount of graphite, low power density design, and high conversion efficiency. However, safety is the most important issue for its commercialization in nuclear energy industry. It is very important for safety design and operation of an HTGR to investigate its thermal–hydraulic characteristics. In this article, it was performed the thermal–hydraulic simulation of compressible flow inside the core of the pebble bed reactor HTR (High Temperature Reactor)-10 using Computational Fluid Dynamics (CFD). The realistic approach was used, where every closely packed pebble is realistically modelled considering a graphite layer and sphere of fuel. Due to the high computational cost is impossible simulate the full core; therefore, the geometry used is a column of FCC (Face Centered Cubic) cells, with 41 layers and 82 pebbles. The input data used were taken from the thermohydraulic IAEA Benchmark (TECDOC-1694). The results show the profiles of velocity and temperature of the coolant in the core, and the temperature distribution inside the pebbles. The maximum temperatures in the pebbles do not exceed the allowable limit for this type of nuclear fuel. (author)

  5. Study of virtual reality application in training programs on nuclear technology; Estudo da aplicacao de realidade virtual em programas de treinamento sobre tecnologia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Pastura, Valeria da Fonseca e Silva

    2016-07-01

    The activities developed in the units which organize the National Nuclear Energy Commission (CNEN) are present in various sectors of the Brazilian society, being them in medicine, industry, electricity generation, mining, and among the others. Based on the assumption that the employees are CNEN's mayor differential and the training programs play an important role in the process of organizational development, because they align the professionals with the strategies of the institution properly. Focusing on these matters, this master's thesis aimed to evaluate the training programs which are applied by CNEN, in order to propose and evaluate the use of the Virtual Reality (VR) expertise as a new method to be applied in the training programs. To accomplish this purpose, we performed two methodological approaches through questionnaires. And from the analysis of the results obtained, we could realize that there was no efficient training program which is systematically applied by CNEN, and the use of the RV technique improves the training programs in the understanding of themes whose assimilation is challengeable, such as those related to nuclear power. In this sense, for a better functional performance, the training programs adopted by CNEN must be structured so as to enable the development of each server's skills as well as abilities and, it is actually hoped that the virtual reality tools could be inserted in these programs to pursue only this purpose. (author)

  6. Determinação da frequência de micronúcleos e outras alterações nucleares em células da mucosa bucal de indivíduos não-fumantes e fumantes

    Directory of Open Access Journals (Sweden)

    Kelly Fernanda Martins

    2007-05-01

    Full Text Available A instabilidade genômica é um dos principais aspectos da mutagênese e está associada com a carcinogênese. Os micronúcleos são cromossomos alterados não incorporados ao núcleo na divisão celular e que apresentam relação com agentes genotóxicos, podendo ser detectados nas células esfoliativas dos epitélios. Com o objetivo de determinar a presença e a freqüência de micronúcleos e outras alterações nucleares, células esfoliativas da mucosa bucal em suspensão salivar de 48 alunos do Curso de Ciências Biológicas, na faixa etária de 20 e 24 anos, sendo 25 não-fumantes e 23 fumantes foram analisadas. As células em suspensão salivar lavadas em solução fisiológica e fixadas em ácido acético e etanol 1:3 durante 24 horas, após hidrolisadas em HCL a 5N na temperatura ambiente durante 30 minutos foram coradas pela reação de Feulgen, durante uma hora e meia contracoradas pelo Fast Green durante um minuto. Os resultados obtidos indicaram que a variação do porcentual da presença de micronúcleos em 1.000 células analisadas por individuo, com significância 0,05 ou 5%, foi de 44% entre os não-fumantes para 91% entre os fumantes. Em relação ao porcentual de freqüência desses micronúcleos, observamos que 100% dos não-fumantes apresentam freqüência variando entre zero e dois, enquanto em 87% dos fumantes variou entre um e três. Quanto às alterações nucleares: brotos nucleares, núcleos interligados e células binucleadas, observamos que a variação de presença nas células foi de 72% entre os não-fumantes para 96% entre os fumantes, sendo que o porcentual de variação de freqüência foi de zero e dois entre 96% de não-fumantes para um e três entre 87% dos fumantes. A análise estatística revelou associação significante entre o hábito de fumar e a presença de micronúcleos e outras alterações nucleares, demonstrando a importância desse teste como indicador da instabilidade genômica.

  7. Immunological evidence for the localization of a 110 kDa poly(A) binding protein from rat liver in nuclear envelopes and its phosphorylation by protein kinase C.

    Science.gov (United States)

    Schäfer, P; Aitken, S J; Bachmann, M; Agutter, P S; Müller, W E; Prochnow, D

    1993-11-01

    We have purified a 110 kDa poly(A) binding protein (P110) from rat liver which is thought to be involved in mRNA translocation through the nuclear pores and have demonstrated its localisation in the nuclear envelope using polyclonal antibodies and confocal laser scanning microscopy. Although P110 was prepared from highly purified nuclear envelopes, the polyclonal antibodies raised against them bind to nucleo- and cytoplasmic structures to a minor extent, but not to nucleolar structures. P110 decays spontaneously into several fragments which are also recognized by the polyclonal antibodies. The 110 kDa polypeptide and its fragments were phosphorylated by a nuclear envelope kinase and this phosphorylation was inhibited by a monoclonal antibody against protein kinase C and by a specific protein kinase C inhibitor obtained from bovine brain. Scatchard analysis was used to determine the influence of protein kinase C activators and inhibitors on nuclear envelope protein phosphorylation and RNA binding. The data indicate a close association between the RNA translocation machinery (the 110 kDa protein) and protein kinase C within the nuclear envelope. We suggest that the fragmentation of P110 is triggered before or during mRNA export and is not due to nonspecific proteolysis.

  8. Transcription factor aryl hydrocarbon receptor/aryl hydrocarbon receptor nuclear translocator is involved in regulation of the xenobiotic tolerance-related cytochrome P450 CYP6DA2 in Aphis gossypii Glover.

    Science.gov (United States)

    Peng, T; Chen, X; Pan, Y; Zheng, Z; Wei, X; Xi, J; Zhang, J; Gao, X; Shang, Q

    2017-10-01

    The cotton aphid, Aphis gossypii, is one of the most economically important agricultural pests worldwide as it is polyphagous and resistant to many classes of insecticides. Overexpression of the cytochrome P450 monooxygenase (P450) CYP6DA2 has previously been found to be associated with gossypol and spirotetramat tolerance in the cotton aphid. In the present study, the elements located in the promoter region (-357:-343; -250:-241; -113:-104) of CYP6DA2 were shown to control promoter activity, and gossypol induction was observed. We hypothesized that the expression of CYP6DA2 is subject to transcriptional regulation. To investigate the underlying mechanism, we assessed two transcription factors, aryl hydrocarbon receptor (AhR) and aryl hydrocarbon receptor nuclear translocator (ARNT), and found that the abundance of AhR was highly correlated with CYP6DA2 abundance. RNA interference of AhR or ARNT significantly decreased the levels of the target gene as well as those of its counterpart, and both dramatically repressed CYP6DA2 expression. Cotransfection of the ARNT, AhR, or AhR plus ARNT and CYP6DA2 promoter constructs elevated CYP6DA2 promoter activity, with the AhR plus ARNT cotransfection being the most effective. Thus, these elements located in the promoter were responsible for CYP6DA2 transcription, and CYP6DA2 expression was regulated by the transcription factors AhR and ARNT. © 2017 The Royal Entomological Society.

  9. Patologia de neonatos bovinos originados por meio da técnica de transferência nuclear de células somáticas – clonagem

    OpenAIRE

    2010-01-01

    Os mecanismos de morte em animais clonados a partir de células somáticas são poucos elucidados. Malformações de órgãos, alterações de tamanho e peso desses animais foram anomalias já descritas, porém em casos isolados. Desse modo, estudos nos níveis anatomo e histopatológicos são de suma importância para ajudar a compreensão dos fatores responsáveis pelos altos índices de insucessos com a utilização da TNCS (transferência nuclear de células somáticas). Assim, o presente trabalho foi realizado...

  10. Study of dose levels absorbed by members of the public in the nuclear medicine departments; Estudo dos niveis de dose em individuos do publico nos servicos de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Cabral, Geovanna Oliveira de Mello

    2001-03-01

    In nuclear Medicine, radioisotopes are bound to various compounds (called radiopharmaceuticals) for use in various diagnostic and therapeutic applications. These unsealed sources are administered in various forms to patients, who remain radioactive for hours or days, and represent a source of potential radiation exposure for others. Thus, in nuclear medicine departments, radiation protection of workers and members of the public, especially persons accompanying patients, must consider, this exposure. In Brazil, the Comissao Nacional de Energia Nuclear (CNEN) establishes that, in nuclear medicine departments, the patients and persons accompanying should be separated each other. However, this rule is not always followed due to many factors such as physical and emotional conditions of patients. In this context, the aim of this study was the investigation of dose levels, which the persons accompanying patients are exposed to. For monitoring, thermoluminescent dosimeters were employed. The dosimeters were given to 380 persons who were accompanying patients in nuclear medicine departments. Exposure results were lower than 1 mSv. On the basis of CNEN rules, issues regarding stay conditions for members of the public in these departments are discussed. (author)

  11. Regulatory approach of the monitoring the effectiveness of maintenance at nuclear power plants program; Abordagem regulatoria do programa de monitoracao da eficacia da manutencao para usinas nucleoeletricas

    Energy Technology Data Exchange (ETDEWEB)

    Vajgel, Stefan

    2009-03-15

    The electrical power generation using nuclear power plants requires this installation being safety, reliable and available for the working periods. For this purpose, an adequate, effective and well conducted maintenance program makes an essential and useful tool to the owner of the plant. However, it is necessary to follow the regulatory requirements for this program implementation which monitories this maintenance effectiveness. There are Brazilian norms requirements which must be followed. The international regulatory guides establish these requirements in good details but it is necessary to verify if this methodology for implementing can be totally applied here in Brazil. Then, the american guide NUMARC 93-01 which details how can be implemented a program for this monitoring, shows some methods for using. In this thesis, the Delphi and Probabilistic Safety Analysis were briefly included because they were preferred for implementing this monitoring.in a Brazilian plant. The results which are being obtained show that, looking the regulatory aspects, the NUMARC 93-01 follows our regulations and gives good results for the plant management. (author)

  12. Critical evaluation of the external occupational exposure in nuclear medicine services in Brazil; Avaliacao critica da exposicao ocupacional externa nos servicos de medicina nuclear no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Kubo, Ana Luiza Silva Lima

    2016-07-01

    Currently in Brazil (2016), there are 421 Nuclear Medicine Services (NMS). In nuclear medicine, the possibility of occupational internal contamination and external exposure is unavoidable. The chest individual monitoring, to estimate the effective dose, is mandatory, but the extremity monitoring is not always made. The aim of this study was to conduct a survey of data for external exposure of NMS professionals in Brazil from 1987 to 2010, analysing them in terms of trends and comparing them with measurements carried out in this work and in other countries. Although most of the NMS is still located in large urban centres (54% in the Southeast region), there is no state without any NMS. The increasing number of NMS has generated the need for more professionals. In the year 1987, they were 755 workers and, in 2010, 4134, with the following distribution of specialties: 29% of Nuclear Medicine Technicians (NMT), 23% of Nursing professionals, 29% of Physicians and 3% of Physicists. The average annual effective dose reached more than 3.0 mSv in some regions of the country, from 1987 to 2010, but tends to 1.0 mSv in 2010. The highest doses, as expected, are received by NMT and Nursing. The professionals who handle radiopharmaceuticals have their hands much more exposed than the chest. During 2010, only 31% of NMT and 16% of Nursing used extremity dosimeters as compared to chest dosimeters. The data from the measurements indicate that not all individual dosimeters are used properly. Generally, both in the measurements as in national registries, the hand doses were higher for professionals who prepared the radiopharmaceutical (NMT) than those who injected (Nursing). The value measured by chest dosimeters can be used to estimate the equivalent dose to the eye lenses, except for NMT at preparation practices at conventional NMS, where the equivalent dose of the lens is about 2 times higher than the dose at the chest. The most exposed areas of the hands are the tips of the index

  13. Exemption from registration for persons authorized under U.S. Nuclear Regulatory Commission or agreement state medical use licenses or permits and administering the drug product DaTscan(TM). Interim final rule with request for comment.

    Science.gov (United States)

    2014-11-25

    The Drug Enforcement Administration (DEA) is amending its regulations to waive the requirement of registration for persons who are authorized under United States Nuclear Regulatory Commission or Agreement State medical use licenses or permits and administer the drug product DaTscan(TM).

  14. Modelling of the tritium dispersion from postulated accidental release of nuclear power plants; Modelagem da dispersao de tritio a partir de liberacoes acidentais postuladas de centrais nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Abner Duarte; Simoes Filho, Francisco Fernando Lamego; Cunha, Tatiana Santos da [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Aguiar, Andre Silva de; Lapa, Celso Marcelo Franklin, E-mail: asoares@cnen.gov.b, E-mail: flamego@ien.gov.b, E-mail: lapa@ien.gov.b [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2011-07-01

    This study has the aim to assess the impact of accidental release of tritium postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models to simulation of tritium dispersion caused by an accident in a Candu reactor located in the ongoing Angra 3 site. The Candu reactor is one that uses heavy water (D{sub 2}O) as moderator and coolant of the core. It was postulated, then, the LOCA accident (without fusion), where was lost 66 m3 of soda almost instantaneously. This inventory contained 35 P Bq and was released a load of 9.7 TBq/s in liquid form near the Itaorna beach, Angra dos Reis - RJ. The models mentioned above were applied in two scenarios (plant stopped or operating) and showed a tritium plume with specific activities larger than the reference level for seawater (1.1 MBq/m{sup 3}) during the first 14 days after the accident. (author)

  15. New recommendations from the IAEA for medical exposures: impact on nuclear medicine in Brazil; Novas recomendacoes da IAEA para exposicoes medicas: impacto em medicina nuclear no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Sa, Lidia Vasconcellos de; Kodlulovich, Simone, E-mail: lidia@ird.gov.br, E-mail: simone@cnen.gov.br [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2013-10-01

    An assessment of the current national standards was performed in order to verify compliance with the new recommendations, taking into account the number of available facilities and medical physicists to meet the requirements. It was found that compliance with the requirements of protocol optimization and individualization of doses, as well as the assignment of responsibility shared by all professionals involved were not disclosed. In Brazil, there is no reference levels established as also there is not a government program to obtain them. The functions and responsibilities of the medical physicist in conducting dosimetry individual patient, quality control and acceptance tests of equipment and also the calibration is not defined in the standard. Currently in Brazil there are 31 certified Medical Physicists in Medicine Nuclear power to meet approximately 390 facilities, representing only 8% required. As a member state of the IAEA, the Brazilian rules governed by CNEN is based on BSS-115, must come to terms with the GSR. The concern is now meeting the requirements, especially those relating to patients, since we have established benchmarks and individualized dosimetry. Beyond addition, the number of medical physicists are not enough to show the country's demand. (author)

  16. Individual internal monitoring of workers of Fabrica de Combustivel Nuclear - FCN; Monitoracao individual interna de trabalhadores da Fabrica de Combustivel Nuclear - FCN

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Marcelo X. [Industrias Nucleares do Brasil (INB), Resende, RJ (Brazil). Fabrica de Combustivel Nuclear]. E-mail: marcelo@inb.gov.br; Melo, Dunstana R.; Cunha, Kenia D. da; Juliao, Ligia Q.C.; Santos, Maristela S.; Fernandes, Paulo C.; Lucena, E.A.; Dantas, Ana L.; Dantas, Bernardo M.; Godoy, Maria L. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)]. E-mail: dunstana@ird.gov.br

    2005-07-01

    In nuclear fuel fabrication facilities, workers are exposed to different compounds of enriched uranium. Due to the high cost of the individual monitoring programme for internal dose assessment in the routine monitoring programmes, usually only one type of measurement is assigned. In complex situations like the one described in this paper, where several parameters can compromise the accuracy of the bioassay interpretation it is need to have a combination of techniques to evaluate the internal dose. According to ICRP 78 (1997), the general order of preference in terms of accuracy of interpretation is: body activity measurement, excreta analysis and personal air sampling. A group of fifteen workers from controlled area of the fuel fabrication facility was selected to evaluate the internal dose using all different available techniques during a certain period. The workers were monitored for determination of uranium content in the daily urinary excretion, faecal excretion, chest counting and personal air sampling (PAS). The results have shown that at least two types of sensitivity techniques must be used, since there are some sources of uncertainties on the bioassay interpretation, like mixture of uranium compounds intake and different routes of intake. The combination of urine and faeces analysis has shown be the more appropriate methodology for assessing internal dose in this situation. (author)

  17. A methodology for semiautomatic taxonomy of concepts extraction from nuclear scientific documents using text mining techniques; Metodologia para extracao semiautomatica de uma taxonomia de conceitos a partir da producao cientifica da area nuclear utilizando tecnicas de mineracao de textos

    Energy Technology Data Exchange (ETDEWEB)

    Braga, Fabiane dos Reis

    2013-07-01

    This thesis presents a text mining method for semi-automatic extraction of taxonomy of concepts, from a textual corpus composed of scientific papers related to nuclear area. The text classification is a natural human practice and a crucial task for work with large repositories. The document clustering technique provides a logical and understandable framework that facilitates the organization, browsing and searching. Most clustering algorithms using the bag of words model to represent the content of a document. This model generates a high dimensionality of the data, ignores the fact that different words can have the same meaning and does not consider the relationship between them, assuming that words are independent of each other. The methodology presents a combination of a model for document representation by concepts with a hierarchical document clustering method using frequency of co-occurrence concepts and a technique for clusters labeling more representatives, with the objective of producing a taxonomy of concepts which may reflect a structure of the knowledge domain. It is hoped that this work will contribute to the conceptual mapping of scientific production of nuclear area and thus support the management of research activities in this area. (author)

  18. Modelling of tritium dispersion from postulated accidental release of nuclear power plants; Modelagem da dispersao de tritio a partir de liberacoes acidentais postuladas de centrais nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Abner Duarte

    2010-07-01

    This study has the aim to assess the impact of accidental release of tritium postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models of hydrodynamics and transport for the simulation of tritium dispersion caused by an accident in a CANDU reactor located in the ongoing Angra 3 site. This exercise was accomplished with the aid of a code system (SisBAHIA) developed in the Rio de Janeiro Federal University (COPPE/UFRJ). The CANDU reactor is one that uses heavy water (D{sub 2}O) as moderator and coolant of the core. It was postulated, then, the LOCA (Loss of Coolant Accident) accident in the emergency cooling system of the nucleus (without fusion), where was lost 66 m{sup 3} of soda almost instantaneously. This inventory contained 35 PBq and was released a load of 9.7 TBq/s in liquid form near the Itaorna beach, Angra dos Reis - RJ. The models mentioned above were applied in two scenarios (plant stopped and operating) and showed a tritium plume with specific activities larger than the reference level for seawater (1.1 MBq/m{sup 3} ) during the first 14 days after the accident. The main difference between the scenario without and with seawater recirculation (pumping and discharge) is based on the enhancement of dilution of the highest concentrations in the last one. This dilution enhancement resulting in decreasing concentrations was observed only during the first two weeks, when they ranged from 1x10{sup 9} to 5x10{sup 5} Bq/m{sup 3} close to the Itaorna beach spreading just to Sandri Island. After 180 days, the plume could not be detected anymore in the bay, because their activities would be lower than the minimum detectable value (< 11 kBq/m{sup 3}). (author)

  19. Study of the distribution of ions and metals in blood using nuclear methodology; Estudo da distribuicao de ions e metais em sangue via metodologia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Laura Cristina de

    2008-07-01

    The present study consists of using nuclear tools aiming to establish an alternative procedure to perform biochemistry analyses in whole blood to help the diagnosis of diverse pathologies. The aim is to determine the ions and metals concentrations in whole blood of human beings (specifically: Br, Cl, K e Na), using neutron activation analysis, providing the limits of normality, as well as, the matrix of the correlation for these elements. To perform this study, 283 samples of whole blood had been analyzed (of healthy volunteers selected from blood banks), resulting in the limits of normality for Br (0.0067 - 0.0263 gl{sup -1}), Cl (2.54 - 3.50 gl{sup -1}), K (1.33 - 1.89 gl{sup -1}) and Na (1.48 - 2.06 gl{sup -1}). These data are the first estimates for reference values in whole blood of the Brazilian population. These limits were evaluated in function of the sex and age for checking the biological differences. The behavior of these limits was also evaluated for different populations, i.e., in two distinct regions: Southeast (blood collection carried out in Sao Paulo city) and Northeast (blood collection carried out in Recife city). These places were chosen in function of the similarities (cities with high concentration people and industrialized). Furthermore, a systematic study of these limits was also evaluated, in the period of 4 (four) years, in Sao Paulo city. This analysis was elaborated in function of time due the necessity to update these data, therefore they act as environment monitors. The estimation for Ca and Fe were also proposal for a set of 22 samples of whole blood.(author)

  20. Nuclear and mitochondrial DNA markers in traceability of retail beef samples Marcadores de DNA nuclear e mitocondrial para rastreabilidade da carne bovina comercializada

    Directory of Open Access Journals (Sweden)

    Aline S.M. Cesar

    2010-09-01

    ém de dados da cadeia produtiva. Em geral, a empresa certificadora dispõe das informações do animal que está sendo abatido, porém não tem condições de garantir se houve erro entre abate, desossa, processamento e a distribuição dos produtos. Existe diferenciação no custo e na qualidade dos produtos cárneos, especialmente no mercado internacional, em virtude do sexo e composição racial dos animais. Os marcadores genéticos permitem identificar as características que são controladas num programa de rastreabilidade bovina tais como sexo e composição racial, permitindo identificar e avaliar corretamente para o consumidor, o produto final. A hipótese deste estudo foi que a maioria das amostras de carne bovina vendida no mercado local seria proveniente de fêmeas e com grande participação de raças Zebu. O objetivo deste trabalho foi caracterizar amostras de carne bovina com marcadores de DNA para identificar o sexo e a composição racial. Em dez pontos comerciais da cidade de Pirasssununga, SP, Brasil, foram coletadas 61 amostras e todas foram genotipadas como possuindo DNA mitocondrial Bos taurus e 18 foram positivos para amplificação do cromossomo Y (macho. Para o marcador sat1711b-Msp I a frequência alélica do A foi 0.278 e para o marcador Lhr-Hha I a frequência alélica do T foi 0.417. Os resultados das frequências alélicas do sat1711b-Msp I e Lhr-Hha I apresentaram menor proporção do genoma Bos indicus em relação ao Bos taurus quando comparado ao rebanho Nelore. Com a metodologia descrita neste trabalho foi possível avaliar o sexo e as características de subespécie das amostras de carne bovina, tendo uma importante aplicação para a certificação de produtos cárneos especialmente, em programas de rastreabilidade animal.

  1. Evaluation of sensitivity evaluation of a contamination monitor for use in monitoring of internal exposure of workers in nuclear medicine; Avaliacao da sensibilidade de um monitor de contaminacao para aplicacao em monitoracao da exposicao interna de trabalhadores em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Dantas, Bernando Maranhao; Assis, Janima Cruz de; Oliveira, Salomao Marques de; Dantas, Ana Leticia Almeida, E-mail: bmdantas@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. de Monitoracao In Vivo. Div. de Dosimetria

    2014-07-01

    In practice of nuclear medicine, expert personnel routinely handle radiopharmaceuticals for diagnosis and radiotherapy. The control of intakes of radionuclides by workers can be performed through internal dosimetry techniques, as an integral part of the radiation protection program of the installation. The use of radiopharmaceuticals for diagnostic and therapeutic purposes in vivo and in vitro in Brazil is regulated by CNEN-NE Standards and 3:05 CNEN-NN 3.01. The International Atomic Energy Agency (IAEA) recommends the establishment of an internal monitoring program on workers, especially those subject to possible exposure to annual effective doses greater than 1 mSv. Note that, currently, in Brazil, are not available qualified laboratories to provide internal monitoring services in all regions in the country, if it were applied by CNEN, the requirement for internal monitoring of workers. This paper presents the development of a simple and low-cost methodology for in vivo monitoring of {sup 131}I in the thyroid. The proposed methodology is the use of portable monitor of surface contamination, equipment available and routinely used in all nuclear medicine services in Brazil. The monitor is calibrated with neck-thyroid simulator developed at the Laboratory of In Vivo Monitoring of IRD/CNEN-RJ. The equipment tested is suitable for application in in vivo occupational monitoring thyroid. This conclusion is based on the fact that the detection system has sufficient sensitivity for monitoring up to seven days after the incorporation of the radionuclide and guarantees {sup 131}I detection in values that result in effective doses below 1 mSv for the exposure scenarios adopted.

  2. Evaluation of internal occupational exposure of workers from nuclear medicine services by aerosol analysis containing {sup 131}I; Avaliacao da exposicao interna de trabalhadores em servicos de medicina nuclear atraves da analise de aerossois contendo {sup 131}I

    Energy Technology Data Exchange (ETDEWEB)

    Carneiro, Luana Gomes; Sampaio, Camilla da Silva; Dantas, Ana Leticia Almeida; Lucena, Eder Augusto; Santos, Maristela Souza; Dantas, Bernardo Maranhao, E-mail: carneiro@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ),Rio de Janeiro, RJ (Brazil); Paula, Gustavo Affonso de [Escola SESC de Ensino Medio, Rio de Janeiro, RJ (Brazil)

    2014-07-01

    This study evaluated the risk of internal occupational exposure associated with the incorporation of {sup 131}I via inhalation, in Nuclear Medicine Services, using aerosol analysis techniques. Occupationally Exposed Individuals (IOE) involved in handling this radionuclide are subject to chronic exposure, which can lead to an increase in the committed effective dose. Results obtained in preliminary studies indicate the occurrence of incorporation of {sup 131}I by workers involved in handling solutions for radioiodine therapy procedures. The evaluation was carried out in radiopharmacy lab (nuclear medicine service) of a public hospital located in the city of Rio de Janeiro. After confirmed the presence of the radioisotope, by a qualitative assessment, it was determined an experimental arrangement for sample collection and were detected and quantitated the presence of steam {sup 131}I during routine work. The average concentration of activity obtained in this study was 3 Bq / m{sup 3}. This value is below of Derived Concentration in Air (DCA) of 8.4 x 10{sup 3} Bq of {sup 131}I / m{sup 3} corresponding to a committed effective dose of 1.76 x 10{sup -4} mSv. These results demonstrate that the studied area is safe in terms of internal exposure of workers. However, the presence of {sup 131}I should be periodically reevaluated, since this type of exposure contributes to the increase of the individual effective doses. Based on the data obtained improvements were suggested in the exhaust system and the use of good work practices in order to optimize the exposures.

  3. Study of the porosity of synthetic sandstones by nondestructive nuclear techniques; Estudo da porosidade de arenitos sinteticos por tecnicas nucleares nao destrutivas

    Energy Technology Data Exchange (ETDEWEB)

    Marques, Leonardo Carmezini

    2008-07-01

    In this paper, nuclear techniques have been used to describe structural characteristics of ceramic samples. These samples were produced to serve as simulates of sandstones and their mainly component was silica (SiO{sub 2}). Three sets of these samples with different characteristics were analyzed with the gamma ray transmission and the X-ray microtomography. They had the function to describe parameters as porosity point to point and total average porosity, for the transmission case, and 2D sections average porosity, total average porosity and size porous distribution for microtomography, as well as to investigate possible irregularities in bulk sample. The experimental set up for the gamma ray transmission technique consisted of: a 2 x 2 crystal NaI(Tl) detector, an {sup 241}Am radioactive source (59.54 keV, 100 mCi), an automatic micrometric table for the sample XZ movement and standard gamma spectrometry electronics. Lead collimators with 2 mm diameter were placed on the source way out and on the detector entrance. The microtomographic measurements were done with a Skyscan system, model 1172, with a X-ray tube with 20-100 kV of voltage range and a CCD camera. Employing gamma ray transmission method was possible to obtain overall porosity values from 25.8 to 34.0 % and from 24.8 to 29.2 % for samples with parallelepiped and cylinder shape, respectively, for ceramic I set; from 58.5 to 61.0 % and from 57.1 to 61.7 % for the same geometric shape of ceramic II set. The samples analyzed by the microtomography achieved resolutions of 1.73 {mu}m, 0.64 {mu}m and 1.28 {mu}m for samples of ceramic set I, II and III, respectively. This methodology provided average total porosity values from 26.6 to 29.4 %, from 48.4 to 51.0 % and from 28.2 to 30.6 % to I, II and III ceramic sets, respectively. The porous size profiles of each ceramic sample were also measured. (author)

  4. The awareness of the functional and near population with the relation to the research nuclear reactor IEA-R1

    Energy Technology Data Exchange (ETDEWEB)

    Vanni, Silvia R.; Martins, Maria da Penha S. [Centro Tecnologico da Marinha (CTMSP), SP (Brazil); Sabundjian, Gaiane, E-mail: gdjian@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-07-01

    After the natural accident that hit Japan in the beginning of March of 2011, and that ended into an accident of great proportions in the nuclear installations of Fukushima, it has now the debate over the lack of information that the population in general has over the nuclear energy. The dissemination of information, about the operation and security of the nuclear reactors, has the purpose of softening the effect that the pessimistic atmosphere has over its using. This study was reinforced by the memories of serious consequences due to other nuclear accidents that have already happened (Chernobyl, Three-Mile and Hiroshima/Nagasaki event), bringing insecurity, fear and even revenge from part of the public. Over all, people are not sufficiently informed about the positives and negatives aspects of the nuclear energy. It is necessary the adoption of a clear and aware policy with the population, about the pacific use of nuclear energy. Today, the international and national organizations of control of nuclear energy, the International Atomic Energy Agency (IAEA) and the Comissao Nacional de Energia Nuclear (CNEN), have respectively, published information about this subject using a more professional way and of hard access for the public in general. This work has the goal of checking the level of information that the population of workers and individuals of the close public to the research nuclear reactor IEA-R1, located in the Institute of Nuclear Research (IPEN), University City, Sao Paulo, Brazil, has over it. The way used for this study, involved questionnaires with straight questions and of simple language over the subject, to people of all different social, economic and cultural classes, from 12 to 80 years old. From the results found after this work, it was verified the necessity to elaborate a project of awareness of information and clarification about the nuclear energy, using ways of communication that exist and that are easy for the public to understand. (author)

  5. Numerical analysis of the fluid dynamics in a natural circulation loop; Analise numerica da dinamica do escoamento em circuitos de circulacao natural

    Energy Technology Data Exchange (ETDEWEB)

    Angelo, Gabriel

    2013-07-01

    Natural circulation loops apply to many engineering applications such as: water heating solar energy system (thermo-siphons), thermal management of electrical components (voltage converter), geothermal energy, nuclear reactors, etc. In pressurized water nuclear reactors, known as PWR's, the natural circulation loops are employed to ensure passive safety. In critical situations, the heat transfer will occur only by natural convection, without any external control or mechanical devices. This feature is desired and has been considered in modern nuclear reactor projects. This work consists of a numerical study of the natural circulation loop, located at the Instituto de Pesquisas Energeticas e Nucleares / Comissao Nacional de Energia Nuclear in Sao Paulo, Brazil, in order to establish the flow pattern in single phase conditions. The comparison of numerical results to experiments in transient condition revealed significant deviations for the Zero Equation turbulence model. Intermediate deviations for the Eddy Viscosity Turbulence Equation (EVTE), k - {omega}, SST e SSG models. And the best results are obtained by the k - {epsilon} e DES models (with better results for the k - {epsilon} model). (author)

  6. Contribuição da medicina nuclear para a avaliação dos linfomas

    Directory of Open Access Journals (Sweden)

    Sapienza Marcelo T.

    2001-01-01

    Full Text Available A medicina nuclear permite a caracterização funcional de tecidos, acrescentando dados à avaliação anatômica realizada por outros métodos de imagem, como a tomografia computadorizada, ressonância magnética ou ultra-som. Além do diagnóstico e estadiamento, as informações funcionais fornecidas pela medicina nuclear são particularmente úteis no seguimento e avaliação de resposta terapêutica dos pacientes com linfoma. A presença de massa residual após quimioterapia ou a infiltração de linfonodos de pequenas dimensões são exemplos de situações nas quais a avaliação isolada de características anatômicas é insuficiente. Os principais métodos utilizados são a cintilografia com gálio-67, traçador com alta afinidade por transferrina e receptores de ferro, e os estudos com flúor-deoxiglicose, emissor de pósitron que permite a caracterização do metabolismo de glicose nos tecidos. Outros traçadores, como o tálio-201, sestamibi-Tc99m e octreotide-In111, também são utilizados em menor escala na avaliação dos pacientes com linfoma. Os mecanismos de captação, principais indicações dos estudos, limitações e resultados de literatura serão revistos.

  7. Alterações nucleares das cellulas do figado nas infecções de Macacus Rhesus e M. Cynomolgus pelo virus da febre amarella

    Directory of Open Access Journals (Sweden)

    C. Magarinos Torres

    1928-01-01

    Full Text Available No figado de um Macacus rhesus inoculado por BEAUREPAIRE ARAGÃO com sangue deum caso benigno de febre amarella e no qual elle descreveu symptomas e lesões typicas semelhantes ás obidas por STOKES, BAUER e HUDSON pela inoculação com o virus africano no mesmo animal, encontrámos alterações nucleares da mesma natureza das assignaladas, no herpes zoster, herpes symptomatico, varicella e virus III do coelho e descriptas ora sob o nome de "inclusões acidophilas intranucleares" (LIPSCHÜTZ, GOODPASTURE, ora sob o de "degeneração oxychromatica" (LAUDA e LUGER. Alterações nucleares semelhantes da cellula hepatica encontrámos, posteriormente em 13 M. rhesus e 2 M. cynomolgus inoculados com e virus brasileiro da febre amarella o qual fôra isolado independentemente por BEAUREPAIRE ARAGÂO e depois por A. MARQUES DA CUNHA e J. MUNIZ de dois casos benignos de febre amarella, tendo sido um dos macacos injectado directamente com o sangue do doente; dois macacos foram inoculados com Aedes aegypti infectados em homem e em macaco; os animais foram anímaes empregados em passagens em serie do virus pelo macaco, e talvez esse facto explique até certo ponto, as notaveis differenças por vezes encontradas nas alterações histopathologicas do figado, visto como, em condições naturaes, o virus nunca passa directamente de homem para homem. A intensidade com que se apresenta a degeneração oxychromatica de modo algum está na dependencia das alterações do conteúdo gorduroso, necrose e necrobiose encontradas; em um caso, ella era a unica alteração presente no figado, sendo então particularmente intensa. As inclusões acidophilas intranucleares (degeneração oxychromatica não foram encontradas em diversos M. rhesus não inoculados e mortos por causas obscuras; no entanto, em taes figados eram presentes infiltração e degeneração gordurosas associadas a alterações de necrose e necrobiose. Alguns estadios (figuras intranucleares "em borboleta

  8. High-Temperature Nuclear Reactors (Overview. Part 1) / Augstas Temperatūras Kodolreaktori (Pārskata raksts) 1. daļa

    Science.gov (United States)

    Ekmanis, J.; Tomsons, E.; Zeltiņš, N.

    2013-02-01

    At the Generation IV International Forum (GIF) of 2001 the measures were approved which are necessary for the development of future generation nuclear reactors (NRs). Six best high-temperature NR technologies were selected, with the main criteria being the safe and economically profitable operation, long-term use, protection against the employment of nuclear material for military purposes and terroristic attacks as well as technologies of fuel close cycle in order to increase the amount of fission material and decrease the amount of highly radioactive waste. In four of the technologies, apart from electricity production also hydrogen is obtained. Part 1 presents a generalized description of the high-temperature NRs, their comparative characteristics and history, with the stopped and operational HTNRs outlined. The properties of different type nuclear fuels are described in detail Ceturtās paaudzes kodolreaktoru starptautiskā forumā 2001.gadā nolēma par nepieciešamiem pasākumiem nākamās paaudzes kodolreaktoru izstrādei. Ir atlasītas sešas reaktoru tehnoloģijas, kuras lietderīgi turpmāk izstrādāt. Tās atlasītas ņemot vērā to drošu un ekonomiski izdevīgu darbību, ilgtspējīgu izmantošanu, aizsardzību pret materiālu izmantošanu militārām vajadzībām un teroristu uzbrukumiem, slēgtā degvielas cikla izmantošanu, lai palielinātu kodoldalīšanās materiālu daudzumu un samazinātu augstas aktivitātes atkritumu daudzumu, kurus būs jāapglabā. Četras no plānotām tehnoloģijām bez elektroenerģijas ieguves varēs ražot ūdeņradi. 1. daļā ietverts vispārīgs apraksts par augstas temperatūras kodolreaktoriem, to salīdzinājums pēc raksturlielumiem, pēc attīstības vēstures. Apskatīti gan apturētie, gan strādājošie reaktori, to kodoldegvielas

  9. Nuclear and Energy Research Institute (1956-2000). A case study under the science, technology and brazilian culture history; Instituto de Pesquisas Energeticas e Nucleares (1956-2000). Um estudo de caso a luz da historia da ciencia, da tecnologia e da cultura brasileira

    Energy Technology Data Exchange (ETDEWEB)

    Gordon, Ana Maria Pinho Leite

    2003-07-01

    We analysed a period of the contemporary Brazilian history with the aim to discuss the inter-relationship between science, technology (S and T) and culture in a developing country, showing as a background for a case of study the history of the 'Instituto de Pesquisas Energeticas e Nucleares'. The history of Science and Technology, as a result of the human brain ability of innovate using the resources offered by nature, it is not only the description of successive findings carried out by talented men. It is a reflex of determined age of history as a consequence of accumulated knowledge connected also to human and cultural relationships, which together leads to the scientific and technological progress. In fact, the human brain and society march along together and can not be separated in this journey. In our study we recovered the initial steps of IPEN's outbreak; inserted its achievements in the context of the national policy for nuclear technology and evaluated how this policy was a reply of the governmental organizations to the worldwide situation. Finally, we spread the scientific ideas and technological findings of this institution, who has translate much of the life style and culture of our society. For this purposes, we analysed internal technical report series elaborated by several researchers and few testimonies. The Institution developed the fuel cycle technology, supplied radioisotopes for medical diagnosis and treatment purposes, generating economic resources for our country. The nuclear techniques are a relevant tool for researchers of this Institution applied for several purposes, including the assessment of the radioactivity levels in the environment, radioprotection, etc. Besides those applications, other techniques including the laser technology, the fuel cell, corrosion studies, etc, were implemented as a result of the improved capabilities and skills acquired during the almost 50 years of the Institute's existence. We make

  10. Daño nuclear en neuronas de cerebros de pacientes con enfermedad de Alzheimer y otras demencias

    Directory of Open Access Journals (Sweden)

    Francisco Lopera

    2000-02-01

    Full Text Available

    Introducción: La enfermedad de Alzheimer (EA es una entidad neurodegenerativa y es la causa más común de demencia. Recientemente se reportó en Antioquia (Colombia un grupo familiar con una mutación puntual en el codon 280 de la Presenilina 1 denominada E280A (sustitución de un ácido glutámico por una alanina, la cual produce un incremento en el acúmulo de b-Amiloide (bA de 42-43 aminoácidos y una patología cerebral severa. Durante los últimos años se ha propuesto que la muerte celular es uno de los factores principales de pérdida neuronal en la EA. Hasta el presente no se ha establecido el tipo de muerte celular implicadas en la pérdida neuronal. Por lo tanto el objetivo de esta investigación es establecer el tipo de muerte celular que ocurre en la EA y otras demencias tales como la Demencia Fronto Temporal (DFT, Huntington y Demencia Cerebro Vascular, con base en los siguientes criterios: 1. Fragmentación del ADN. 2. Cambios morfológicos nucleares. 3. Cambios citoplasmáticos y 4. Expresión de ciertas proteínas asociadas a muerte celular. Los resultados de esta investigación permitirán establecer una correlación entre los parámetros morfológicos e histoquímicos antes mencionados, entre placas de bA y ovillos neurofibrilares en la EA y con ovillos neurofibrilares en la DFT adicionalmente. Este trabajo nos permitirá determinar si existe un mecanismo común de muerte celular en las enfermedades neurodegenerativas con demencia.

    Ageing implementation and refurbishment development at the IEA-R1 nuclear research reactor: a 15 years experience

    Energy Technology Data Exchange (ETDEWEB)

    Cardenas, Jose Patricio N.; Ricci Filho, Walter; Carvalho, Marcos R. de; Berretta, Jose Roberto; Marra Neto, Adolfo, E-mail: ahiru@ipen.b, E-mail: wricci@ipen.b, E-mail: carvalho@ipen.b, E-mail: jrretta@ipen.b, E-mail: amneto@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-07-01

    IPEN (Instituto de Pesquisas Energeticas e Nucleares) is a nuclear research center established into the Secretary of Science and Technology from the government of the state of Sao Paulo, and administered both technically and financially by Comissao Nacional de Energia Nuclear (CNEN), a federal government organization under the Ministry of Science and Technology. The institute is located inside the campus of the University of Sao Paulo, Sao Paulo city, Brazil. One of major nuclear facilities at IPEN is the IEA-R1 nuclear research reactor. It is the unique Brazilian research reactor with substantial power level suitable for application with research in physics, chemistry, biology and engineering, as well as radioisotope production for medical and other applications. Designed and built by Babcok-Wilcox, in accordance with technical specifications established by the Brazilian Nuclear Energy Commission, and financed by the US Atoms for Peace Program, it is a swimming pool type reactor, moderated and cooled by light water and uses graphite and beryllium as reflector elements. The first criticality was achieved on September 16, 1957 and the reactor is currently operating at 4.0 MW on a 64h per week cycle. Since 1996, an IEA-R1 reactor ageing study was established at the Research Reactor Center (CRPq) related with general deterioration of components belonging to some operational systems, as cooling towers from secondary cooling system, piping and pumps, sample irradiation devices, radiation monitoring system, fuel elements, rod drive mechanisms, nuclear and process instrumentation and safety operational system. Although basic structures are almost the same as the original design, several improvements and modifications in components, systems and structures had been made along reactor life. This work aims to show the development of the ageing program in the IEA-R1 reactor and the upgrading (modernization) that was carried out, concerning several equipment and system in the

  11. Influência das gonadotrofinas na regulação da maturação nuclear de oócitos eqüinos Influence of gonadotropins on nuclear maturation of equine oocytes

    Directory of Open Access Journals (Sweden)

    Juan Manuel Larre Borges

    1998-06-01

    Full Text Available A maturação in vitro, fecundação e as técnicas de cultivo de embriões na espécie eqüina são extremamente importantes e necessárias para se examinar as causas de repetição de cio, redução de concepção em éguas velhas e também para a preservação da espécie eqüina. Para avaliar o efeito das gonadotrofinas na regulação da maturação nuclear de oócitos eqüinos, folículos com diâmetro entre 5 a 20mm foram aspirados de 551 ovários provenientes de matadouro obtendo-se 408 oócitos aptos para cultivo. Após a aspiração, os oócitos foram avaliados no próprio líquido folicular quanto a sua integridade e distribuídos nos diferentes tratamentos. No Tratamento I (T1 - grupo controle - os oócitos (n=92 foram cultivados em TCM-199 modificado (mod., com 25mM de HEPES, 2,2mg/ml de bicarbonato de sódio, 1 mi g/ml 17-beta estradiol, 250mi M de piruvato de sódio e 0,4% de albumina sérica bovina. No tratamento 2 (T2, os oócitos (n= 108 foram cultivados no mesmo meio TC M-199 mod. acrescido de lug/ml de hormônio luteinizante suíno (LHs. No Tratamento 3 (T3, os oócitos (n=102 também foram cultivados em TCM-199 mod. porém com 0,5mi g/ml de hormônio folículo estimulante suíno (FSHs e no Tratamento 4 (T4 os oócitos (n= 106 foram cultivados com 1mi g/ml de LHs e 0,5mi g/ml, de FSHs. Os oócitos dos quatros tratamentos foram cultivados em estufa a 39°C com 5% de CO2 , e 95% de umidade relativa no ar, durante 24 h. Após este período, as células do Cumulus oophorus foram removidas e os oócitos fixados em solução de ácido acético glacial-metanol (1:3 em placas de Petri 10 x 35mm por 24h sendo posteriormente corados com aceto-orceína. O percentual de oócitos em telófase I / metáfase II foi de 55,6% (59/106 para o T4 (FSHs/LHs e de 53,9% (55/102 para o T3 (FSHs, os quais não diferiram significativamente. No entanto, estes percentuais foram significativamente superiores (pIn vitro maturation, in vitro fertilization

  12. Regularity of the wear control of radioactive sources from the nuclear measurers; Regularidad del control del desgaste de fuentes radioactivas de los medidores nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira L, M. [Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN-SP, Av. Prof. Lineu Prestes 2242 - Cidade Universitaria -CEP(ZC) 05508-900, tel: (005511) 3816-9215, Sao Paulo, (Brazil)]. e-mail: mflima@ipen.br

    2006-07-01

    The control of radioactive sources in Brazil is regulated by the CNEN (National Comissao of Nuclear Energy). The Laboratory of Descontaminacao of the IPEN (Institute of Energy Y Nuclear Investigations) it offers to the companies that work with nuclear measurers, essays for control of the source wear according to the ISO 9978/1992 through the smear tests Y of leakage. The analyses are taken in alpha Y beta detectors of low bottom radiation with annual detection limits around 1 Bq. Certificates of the accepted analyses by the CNEN for sources that already passed its time of validity assured by the makers, but its continue operational are emitted. The smear test is repeated the whole year, while the leakage test repeats to every two years. A balance of the last two years of the activities of the laboratory shows the regularity of the clients Y the growth of companies specialized in radioprotection with official of radioprotection, credited by the regulatory authority that its act as intermediaries in the process, contacting the clients, gathering the samples next to the proprietors of sources Y hiring our services. Overalls, proves that the inspection activities by part of the regulatory authority are fulfil. In 2004, 192 sources were analyzed by the smear method Y 86 sources by leakage. In 2005, 232 sources were analyzed by the smear method Y 60 sources by leakage. All the leakage tests was made in sources of Americium of oneself Y only client that brings the sources so that they dismantle them to him in the Sources production laboratory of the IPEN. By the quantity Y age of the sources that were analyzed in those two years, it is proven that the number of sources without use conditions (total activity measured by the two added methods smaller than 180Bq) it doesn't arrive to 2%. (Author)

  13. Efeito do número da passagem e do gênero das células doadoras de núcleo no desenvolvimento de bovinos produzidos por transferência nuclear

    OpenAIRE

    2010-01-01

    Objetivou-se com este trabalho avaliar o efeito do número da passagem e do sexo das células doadoras de núcleo no desenvolvimento embrionário e fetal após transferência nuclear. Para isso, oócitos bovinos foram maturados, enucleados e reconstruídos com células somáticas de animal adulto. Após a fusão e ativação química, os zigotos reconstituídos foram cultivados em Charles Rosenkranz 2 (CR2) com monocamada de células da granulosa a 38,8ºC em atmosfera umidificada a 5% de CO2 em ar, durante se...

  14. COORDENAÇÃO DO CICLO CELULAR E INIBIÇÃO DA DESACETILAÇÃO NO DESENVOLVIMENTO DE EMBRIÕES SUÍNOS PRODUZIDOS POR TRANSFERÊNCIA NUCLEAR

    OpenAIRE

    2015-01-01

    A clonagem por transferência nuclear de células somáticas (SCNT) têm sido utilizada nos últimos anos para diversos fins, tanto para a produção de cópias de animais geneticamente superiores quanto para a produção de animais geneticamente modificados. Principalmente como ferramenta de pesquisa básica, buscando compreender aspectos relacionados a reprogramação celular. Apesar de passados vários anos desde o nascimento do primeiro animal clonado a partir de uma célula somática, a eficiência da té...

  15. 7. Annual seminar of the scientific initiation of the Center for Development of Nuclear Technology. Abstracts; 7. Seminario anual de iniciacao cientifica do Centro de Desenvolvimento da Tecnologia Nuclear. Resumos

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-07-01

    This seminar presents the Scientific Initiation Program developed at the CDTN - Brazilian Center for the Development of Nuclear Technology and focuses on activities of the sectors of: radiopharmaceutical production; radiation applied to health; waste management; structural integrity; environment; nanotechnology and nuclear materials; reactor technology; mineral technology; reactor and analytical techniques.

  16. Conflict between constitutional norms: monopoly of nuclear ore and the social function of property in Brazil; Conflito entre normas constitucionais: monopolio do minerio nuclear e a funcao social da propriedade no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Costa-de-Moura, Jorge

    2014-07-01

    This monograph broaches about the conflict existing between the social Constitution of 1988, in relation to what is disposed in the Article 5, XXIII and XXIV, entrenchment clause of immediate application that determines the social function of property in Brazil, and articles 21, XXIII, and 177, V, that stipulate the monopoly of ores containing nuclear elements, i.e., those containing the chemical elements uranium, thorium, and plutonium in economically exploitable amounts. Initially, the work deals with legal definitions for nuclear ore, nuclear policy of some countries, the economical concepts of the social function of property and the negative aspects related to the maintenance of the nuclear ore in the state monopole regime in confrontation with the economic and social interest also expressed in the Constitutional Valance of 1988. Finally, it is presented an actualized compilation of nuclear laws related to the Brazilian nuclear policy and a glossary of terms used in the nuclear policy conducted by the Brazilian Nuclear Regulatory Agency (CNEN). (author)

  17. The PRONUCLEAR role (1976-1986) in the human resource training for the nuclear area in Brazil: science history; O papel do PRONUCLEAR (1976 -1986) na formacao de recursos humanos para a area nuclear no Brasil: historia da ciencia

    Energy Technology Data Exchange (ETDEWEB)

    Schmiedecke, Winston Gomes

    2006-07-01

    In 1975, an agreement between the governments of Brazil and West-Germany was signed for the construction of nuclear power plants in Brazil as well as the extraction, processing and enrichment of uranium. As the result of the first oil crisis and facing the perspective of a continuous world energy crisis, the Brazilian government decided to turn to nuclear power as an alternative supply for the country's energy needs. However, serious limitations were present regarding the transfer of nuclear technology for a third world country. This paper analyzes some aspects of the process involved in the creation of the specialized human resources during the extent of the agreement between Brazil and West Germany. Since its inception, the agreement received harsh criticism from the Brazilian nuclear physics and related fields scientific communities. Because the planning and implementation of the agreement took place during a period of military dictatorship, the decisions relating to the agreement were never debated between the policy makers and the scientific community. Not surprisingly, the agreement received plenty of criticism that ranged from the actual need for nuclear power to technical feasibility and suspicious of possible military uses and even the very policies created to prepare human resources to work in the nuclear area. One of the most important tools of these policies was the Programa de Recursos Humanos para o Setor Nuclear - PRONUCLEAR (Nuclear Sector Human Resources Program), implemented in 1976 and gradually deactivated starting in 1983. (author)

  18. Fatores genéticos na agregação familiar da pressão arterial de famílias nucleares portuguesas Factores genéticos en la agregación familiar de la presión arterial de familias nucleares portuguesas Genetic factors in familial aggregation of blood pressure of portuguese nuclear families

    Directory of Open Access Journals (Sweden)

    Rogério César Fermino

    2009-03-01

    Full Text Available FUNDAMENTO: Apesar da elevada prevalência de hipertensão arterial em Portugal, a importância relativa que os genes possam exercer na manifestação final dos valores da pressão arterial (PA parece pouco estudada. OBJETIVOS: Verificar a presença, indireta, de transmissão vertical de fatores genéticos entre progenitores e descendentes nos valores da PA, e estimar a contribuição dos fatores genéticos responsáveis pela variação dos valores de PA em termos populacionais. MÉTODOS: A amostra foi constituída por 367 indivíduos (164 progenitores e 203 descendentes pertencentes a 107 famílias nucleares provenientes de diferentes regiões do norte de Portugal, participantes do projeto "Famílias Activas". A PA foi medida com um aparelho digital da marca Omron®, modelo M6 (HEM-7001-E. Foram utilizados os softwares estatísticos SPSS 15.0 para a análise exploratória de dados e o cálculo das estatísticas descritivas, e o PEDSTATS para analisar o comportamento genérico das variáveis entre os diferentes membros da família. O cálculo das correlações entre familiares e as estimativas de heritabilidade foram realizados nos módulos FCOR e ASSOC do software de epidemiologia genética S.A.G.E., versão 5.3. RESULTADOS: Para a PA sistólica (PAS, os valores das correlações entre os graus de parentesco foram de baixos a moderados (0,21FUNDAMENTO: A pesar de la elevada prevalencia de hipertensión arterial en Portugal, la importancia relativa que los genes pueden ejercer en la manifestación final de los valores de la presión arterial (PA nos parece poco estudiada. OBJETIVOS:Verificar la presencia, indirecta, de transmisión vertical de factores genéticos entre progenitores y descendientes en los valores de la PA, y estimar el aporte de los factores genéticos responsables de la variación de los valores de PA en términos poblacionales. MÉTODOS: La muestra estaba conformada por 367 individuos (164 progenitores y 203 descendientes

  19. Proceedings of the Thirty-year celebration symposium of the Applied Nuclear Physics Lab. from UEL; Anais do simposio comemorativo dos 30 anos do Laboratorio de Fisica Nuclear Aplicada da UEL

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This Symposium was held from October 18-23, 2007 to celebrate 30 years of the Laboratory for Applied Nuclear Physics from UEL-University of Londrina, State of Parana, Brazil. It comprised: eight major conferences; two talks; a mini-course about 'X-ray fluorescence and its applications with a portable equipment', and results from 45 research works carried out by scientific groups from various Brazilian R and D institutions - five of these scientific works were chosen to be presented as oral communications. The main topics of the research works were thus distributed: 17% in materials science, 15% about application of isotopes and radiation sources, 15% in analytical chemistry, 11% in environmental sciences, 11% in mathematical methods and computing, 11% in engineering (studies of specific nuclear reactors), 2% in geosciences, 2% in radiology and nuclear medicine, a few in radiation protection and dosimetry, and others in instrumentation related to nuclear science and technology.

  1. Assessment of {sup 222}Rn occupational exposure at IPEN nuclear materials storage site, SP, Brazil; Avaliacao da exposicao ocupacional ao {sup 222}Rn no galpao da Salvaguardas do IPEN, SP

    Energy Technology Data Exchange (ETDEWEB)

    Caccuri, Lilian Saueia

    2007-07-01

    In this study it was assessed the occupational exposure to {sup 222}Rn at IPEN, SP, Brazil, nuclear materials storage site through the committed effective dose received by workers exposed to this radionuclide. The radiation dose was calculated through the radon concentrations at nuclear materials storage site. Radon concentrations were determined by passive detection method with solid state nuclear detectors (SSNTD). The SSNTD used in this study was the polycarbonate Makrofol E; each detector is a small square plastic of 1 cm{sup 2}, placed into a diffusion chamber type KFK. It was monitored 14 points at nuclear materials storage site and one external point, over a period of 21 months, changing the detectors every three months, from December 2004 to September 2006. The {sup 222}Rn concentrations varied from 196 {+-} 9 and 2048 {+-} 81 Bq{center_dot}m{sup -3}. The committed effective dose due to radon inhalation at IPEN nuclear materials storage site was obtained from radon activity incorporated and dose conversion factor, according to International Commission on Radiological Protection procedures. The effective committed dose received by workers is below 20 mSv{center_dot}y{sup -1}. This value is suggested as an annual effective dose limit for occupational exposure by ICRP 60. (author)

  2. Assessment of {sup 222}Rn occupational exposure at IPEN nuclear materials storage site, SP, Brazil; Avaliacao da exposicao ocupacional ao {sup 222}Rn no galpao da Salvaguardas do IPEN, SP

    Energy Technology Data Exchange (ETDEWEB)

    Caccuri, Lilian Saueia

    2007-07-01

    In this study it was assessed the occupational exposure to {sup 222}Rn at IPEN, SP, Brazil, nuclear materials storage site through the committed effective dose received by workers exposed to this radionuclide. The radiation dose was calculated through the radon concentrations at nuclear materials storage site. Radon concentrations were determined by passive detection method with solid state nuclear detectors (SSNTD). The SSNTD used in this study was the polycarbonate Makrofol E; each detector is a small square plastic of 1 cm{sup 2}, placed into a diffusion chamber type KFK. It was monitored 14 points at nuclear materials storage site and one external point, over a period of 21 months, changing the detectors every three months, from December 2004 to September 2006. The {sup 222}Rn concentrations varied from 196 {+-} 9 and 2048 {+-} 81 Bq{center_dot}m{sup -3}. The committed effective dose due to radon inhalation at IPEN nuclear materials storage site was obtained from radon activity incorporated and dose conversion factor, according to International Commission on Radiological Protection procedures. The effective committed dose received by workers is below 20 mSv{center_dot}y{sup -1}. This value is suggested as an annual effective dose limit for occupational exposure by ICRP 60. (author)

  3. SBBN 2010: 7. Congress of the Brazilian Society of Nuclear Biosciences. Radiations in biosciences: advances and trends; SBBN 2010: 7. Congresso da Sociedade Brasileira de Biociencias Nucleares. Radiacoes em biociencias: avancos e perspectivas

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    Advance and new perspectives related to the use of ionizing and no ionizing radiations in nuclear biosciences are presented. Multidisciplinary approach, including radiopharmacy, radioprotection and dosimetry, cytogenetic, biosafety, radioecology, environmental toxicology are studied. Topics of Nuclear medicine, radiotherapy and image diagnosis, such as computerized tomography, PET scan, phantoms, biomedical radiography, are reported. Use of radioisotopes, evaluation of radiation dose rates, radiation dose distribution, radiation monitoring is considered. Environmental impact of radiation are also in human beings, animals and for several purposes are analyzed. (MAC)

  4. Modificações epigenéticas da cromatina e sua relação com a reprogramação nuclear de bovinos

    OpenAIRE

    2015-01-01

    A reprogramação nuclear de uma célula somática a um estado embrionário tem diversas aplicações, como pesquisas básicas na biologia do desenvolvimento, terapia celular, melhoramento genético em animais de produção e conservação de espécies. As principais técnicas utilizadas para a reprogramação nuclear são a transferência nuclear de células somáticas (TNCS) e a geração de células tronco pluripotente induzidas (iPS). Muitos trabalhos têm mostrado uma baixa eficiência no processo de reprogramaçã...

  5. Frequência de micronucleação e de outras alterações nucleares em células da mucosa bucal de pacientes anêmicos

    Directory of Open Access Journals (Sweden)

    Raissa Negrelli da Silva Ferri

    2014-10-01

    Full Text Available Introdução: o Teste Citogenético do Micronúcleo é um biomarcador que fornece informações para avaliar lesões cromossômicas oriundas de ações genotóxicas. A frequência de micronúcleos pode ser mensurada em situações de exposição a ambiente e substâncias com alto poder genotóxico. Muitas anemias apresentam sua gênese na deficiência nutricional e têm como consequência o aumento das lesões no DNA, assim como estresse oxidativo elevado. A deficiência de ácido fólico e de vitamina B12 determina maior instabilidade cromossômica, seja pela carência de cofatores ou por lesões oxidativas no material genético, com implicações no sistema de reparo do DNA; Objetivo: avaliar a frequência de micronucleação e de outras alterações nucleares em células da mucosa bucal de adultos anêmicos; Metodologia: o estudo foi conduzido com 60 indivíduos, dos quais 30 eram anêmicos e 30 compuseram o grupo controle. Foi feito o Teste do Micronúcleo e as amostras de células da mucosa bucal foram colhidas e processadas conforme o protocolo de Thomas, et. al. (2009. Resultados : a frequência de micronucleação e de outras alterações nucleares foram maiores em anêmicos, enquanto o grupo controle apresentou maior capacidade proliferativa. Conclusão: a elevada frequência de micronúcleos em anêmicos foi atribuída ao estresse oxidativo, ao déficit nutricional ou a outras condições predisponentes como a etiologia genética da anemia ou a presença de doença crônica.

  6. Factor analysis for the adoption of nuclear technology in diagnosis and treatment of chronic diseases; Analise de fatores para adocao da tecnologia nuclear no diagnostico e tratamento de doencas cronicas

    Energy Technology Data Exchange (ETDEWEB)

    Sato, Renato Cesar, E-mail: rcsato@unifesp.br [Universidade Federal de Sao Paulo - UNIFESP, Sao Paulo (SP), (Brazil); Zouain, Desiree Moraes [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2012-07-01

    To identify and evaluate latent variables (variables that are not directly observed) for adopting and using nuclear technologies in diagnosis and treatment of chronic diseases. The measurement and management of these latent factors are important for health care due to complexities of the sector. Methods: An exploratory factor analysis study was conducted among 52 physicians practicing in the areas of Cardiology, Neurology and Oncology in the State of Sao Paulo who agreed to participate in the study between 2009 and 2010. Data were collected using an attitude measurement questionnaire, and analyzed according to the principal component method with Varimax rotation. Results: The component matrix after factor rotation showed three elucidative groups arranged according to demand for nuclear technology: clinical factors, structural factors, and technological factors. Clinical factors included questionnaire answers referring to medical history, previous interventions, complexity and chronicity of the disease. Structural factors included patient age, physician's practice area, and payment ability. Technological factors included prospective growth in the use of nuclear technology and availability of services. Conclusions: The clinical factors group dimension identified in the study included patient history, prior interventions, and complexity and chronicity of the disease. This dimension is the main motivating for adopting nuclear technology in diagnosis and treatment of chronic diseases. (author)

  7. Analysis of the systems for management of radioactive wastes from nuclear medicine clinics of the city of Recife, Pernambuco, Brazil; Analise dos sistemas de gerenciamento de rejeitos radioativos de clinicas de medicina nuclear da cidade de Recife, PE

    Energy Technology Data Exchange (ETDEWEB)

    Lira, Renata Farias de; Lopes, Ferdinand de Jesus; Passos, Robson Silva; Silva, Valeria Cosma Bento da; Belo, Igor Burgo, E-mail: renatafariasdelira@hotmail.co, E-mail: ferdinand.lopes@oi.com.b, E-mail: robson.passos@hotmail.co, E-mail: Valleria_@hotmail.co, E-mail: Igor.burgo@gmail.co [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco, Recife, PE (Brazil); Santos, Marcus Aurelio Pereira dos, E-mail: masantos@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2009-07-01

    In nuclear medicine compounds marked with radionuclides, called radiopharmaceuticals, for obtention diagnostic information and for diseases treatment. The physicochemical characteristics of the radiopharmaceuticals determine his fixation at target-organ, and the physical characteristics determine the compound application in diagnostic or therapy. The handling of radiopharmaceuticals generates solid, liquid and gas wastes. The presence of these wastes implies in a adequate management according to regulation standards established by the Brazilian Nuclear Energy Commission (CNEN). The objective of safe management of radioactive wastes is to protect the human being and the preservation of the environment, limiting possible radiological impacts for the future generation, and comprehend a set of technical and administrative activities involved in the collection, segregation, handling, conditioning, transportation, storage, control and elimination, or the final deposition. This work intends to verify if the radioactive waste management systems from the nuclear medicine clinics at the city of Recife are conformal with te normative regulations issued by the CNEN. The initial obtained results are used to elaboration of conformal verification spreadsheet and its application in six nuclear medicine clinics at Recife

  8. Importance of the radioactive or nuclear component and its conjunction with conventional risks in social phenomena resulting from terrorist acts; Importancia da componente radioactiva e ou nuclear e sua conjuncao com riscos convencionais, em fenomenos sociais decorrentes de accoes terroristas

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Francisco Miguel da Rocha Grave [Coronel, Portuguese Army, Ministerio da Defesa Nacional (Portugal)

    2009-05-15

    The current strategic environment has attenuated the traditional threats of military nature. However, several instability factors result on new risks and potential threats. A review is made on the current threats and risk scenarios and the capacities for intervention of the Portuguese Army in scenarios involving the use of nuclear, biological and chemical weapons.

  9. Controle da lagarta-da-soja com aplicações de seu vírus de poliedrose nuclear por vias aérea e terrestre Control of the velvetbean caterpillar through air and land applications of its nuclear polyhedrosis virus

    Directory of Open Access Journals (Sweden)

    SÉRGIO ARCE GOMEZ

    2000-03-01

    Full Text Available De 1983 a 1988 foram conduzidos, na região de Dourados, MS, seis experimentos e três campos-piloto, objetivando controlar a lagarta Anticarsia gemmatalis Hübner, 1818, com aplicações aérea e terrestre de seu vírus de poliedrose nuclear (VPN Ag. Cem lagartas equivalentes (LE de VPN Ag associadas a óleo de soja, melaço de cana-de-açúcar e água, foram aplicadas com avião agrícola equipado com Micronair. Os preparados oleosos (5,5 e 5 L ha-1 e com melaço (10 L ha-1 controlaram 75-89% e 79-96% das lagartas, respectivamente. A suspensão aquosa de 3 L ha-1 foi ineficaz, porém as de 15, 20 e 25 L ha-1 controlaram de 81% a 90% das lagartas. Cinqüenta LE, aplicadas com avião agrícola (3 L ha-1 ou atomizador (15 L ha-1, foram ineficientes. Aplicações da mesma dose com pulverizador de barra (134 e 150 L ha-1 proporcionaram controle de 87% e 90%, respectivamente, e com avião (15, 20 e 25 L ha-1, entre 93% e 98%. Aplicações aéreas de 50 LE com óleo de soja (5 L ha-1 ou melaço (10 L ha-1 foram eficientes (86-88% e 99%, respectivamente. Aplicações aéreas de suspensões aquosas e formulado oleoso, em campos-piloto, confirmaram os resultados experimentais.From 1983 to 1988 six experiments and three pilot fields were carried out at Dourados, Mato Grosso do Sul State, Brazil, aimed at controlling Anticarsia gemmatalis Hübner, 1818 (Lepidoptera: Noctuidae larvae through air and land applications of its nuclear polyhedrosis virus (Ag NPV. One hundred larval equivalents (LE of NPV were applied, with soybean oil, sugar cane molasses and water, with an Ipanema spraying plane equipped with Micronair nozzles. The oil (5.5 and 5 L ha-1 and molasses (10 L ha-1 preparations yielded 75-89% and 79-96% control, respectively. The use of aqueous formulation (3 L ha-1 didn't provide good control, but 15, 20 and 25 L ha-1 were effective (81-90%. Fifty LE applied by plane at 3 L ha-1 or by a tractor propelled atomizer (15 L ha-1 was inefficient. Fifty

  10. Nuclear Medicine

    Science.gov (United States)

    ... for Parents/Teachers Resource Links for Students Glossary Nuclear Medicine What is nuclear medicine? What are radioactive ... NIBIB-funded researchers advancing nuclear medicine? What is nuclear medicine? Nuclear medicine is a medical specialty that ...

  11. Cold nuclear matter effects on J/ψ yields as a function of rapidity and nuclear geometry in d+A collisions at sqrt[s(NN)]=200  GeV.

    Science.gov (United States)

    Adare, A; Afanasiev, S; Aidala, C; Ajitanand, N N; Akiba, Y; Al-Bataineh, H; Alexander, J; Angerami, A; Aoki, K; Apadula, N; Aphecetche, L; Aramaki, Y; Asai, J; Atomssa, E T; Averbeck, R; Awes, T C; Azmoun, B; Babintsev, V; Bai, M; Baksay, G; Baksay, L; Baldisseri, A; Barish, K N; Barnes, P D; Bassalleck, B; Basye, A T; Bathe, S; Batsouli, S; Baublis, V; Baumann, C; Bazilevsky, A; Belikov, S; Belmont, R; Bennett, R; Berdnikov, A; Berdnikov, Y; Bhom, J H; Bickley, A A; Blau, D S; Boissevain, J G; Bok, J S; Borel, H; Boyle, K; Brooks, M L; Buesching, H; Bumazhnov, V; Bunce, G; Butsyk, S; Camacho, C M; Campbell, S; Caringi, A; Chang, B S; Chang, W C; Charvet, J-L; Chen, C-H; Chernichenko, S; Chi, C Y; Chiu, M; Choi, I J; Choi, J B; Choudhury, R K; Christiansen, P; Chujo, T; Chung, P; Churyn, A; Chvala, O; Cianciolo, V; Citron, Z; Cole, B A; Conesa del Valle, Z; Connors, M; Constantin, P; Csanád, M; Csörgo, T; Dahms, T; Dairaku, S; Danchev, I; Das, K; Datta, A; David, G; Dayananda, M K; Denisov, A; d'Enterria, D; Deshpande, A; Desmond, E J; Dharmawardane, K V; Dietzsch, O; Dion, A; Donadelli, M; Drapier, O; Drees, A; Drees, K A; Dubey, A K; Durham, J M; Durum, A; Dutta, D; Dzhordzhadze, V; D'Orazio, L; Edwards, S; Efremenko, Y V; Ellinghaus, F; Engelmore, T; Enokizono, A; En'yo, H; Esumi, S; Eyser, K O; Fadem, B; Fields, D E; Finger, M; Finger, M; Fleuret, F; Fokin, S L; Fraenkel, Z; Frantz, J E; Franz, A; Frawley, A D; Fujiwara, K; Fukao, Y; Fusayasu, T; Garishvili, I; Glenn, A; Gong, H; Gonin, M; Gosset, J; Goto, Y; Granier de Cassagnac, R; Grau, N; Greene, S V; Grim, G; Grosse Perdekamp, M; Gunji, T; Gustafsson, H-Å; Hadj Henni, A; Haggerty, J S; Hahn, K I; Hamagaki, H; Hamblen, J; Han, R; Hanks, J; Hartouni, E P; Haruna, K; Haslum, E; Hayano, R; He, X; Heffner, M; Hemmick, T K; Hester, T; Hill, J C; Hohlmann, M; Holzmann, W; Homma, K; Hong, B; Horaguchi, T; Hornback, D; Huang, S; Ichihara, T; Ichimiya, R; Iinuma, H; Ikeda, Y; Imai, K; Imrek, J; Inaba, M; Isenhower, D; Ishihara, M; Isobe, T; Issah, M; Isupov, A; Ivanischev, D; Iwanaga, Y; Jacak, B V; Jia, J; Jiang, X; Jin, J; Johnson, B M; Jones, T; Joo, K S; Jouan, D; Jumper, D S; Kajihara, F; Kametani, S; Kamihara, N; Kamin, J; Kang, J H; Kapustinsky, J; Karatsu, K; Kasai, M; Kawall, D; Kawashima, M; Kazantsev, A V; Kempel, T; Khanzadeev, A; Kijima, K M; Kikuchi, J; Kim, A; Kim, B I; Kim, D H; Kim, D J; Kim, E; Kim, E J; Kim, S H; Kim, Y-J; Kinney, E; Kiriluk, K; Kiss, Á; Kistenev, E; Klay, J; Klein-Boesing, C; Kochenda, L; Komkov, B; Konno, M; Koster, J; Kozlov, A; Král, A; Kravitz, A; Kunde, G J; Kurita, K; Kurosawa, M; Kweon, M J; Kwon, Y; Kyle, G S; Lacey, R; Lai, Y S; Lajoie, J G; Layton, D; Lebedev, A; Lee, D M; Lee, J; Lee, K B; Lee, K S; Lee, T; Leitch, M J; Leite, M A L; Lenzi, B; Li, X; Lichtenwalner, P; Liebing, P; Linden Levy, L A; Liška, T; Litvinenko, A; Liu, H; Liu, M X; Love, B; Lynch, D; Maguire, C F; Makdisi, Y I; Malakhov, A; Malik, M D; Manko, V I; Mannel, E; Mao, Y; Mašek, L; Masui, H; Matathias, F; McCumber, M; McGaughey, P L; McGlinchey, D; Means, N; Meredith, B; Miake, Y; Mibe, T; Mignerey, A C; Mikeš, P; Miki, K; Milov, A; Mishra, M; Mitchell, J T; Mohanty, A K; Moon, H J; Morino, Y; Morreale, A; Morrison, D P; Moukhanova, T V; Mukhopadhyay, D; Murakami, T; Murata, J; Nagamiya, S; Nagle, J L; Naglis, M; Nagy, M I; Nakagawa, I; Nakamiya, Y; Nakamura, K R; Nakamura, T; Nakano, K; Nam, S; Newby, J; Nguyen, M; Nihashi, M; Niita, T; Nouicer, R; Nyanin, A S; Oakley, C; O'Brien, E; Oda, S X; Ogilvie, C A; Oka, M; Okada, K; Onuki, Y; Oskarsson, A; Ouchida, M; Ozawa, K; Pak, R; Palounek, A P T; Pantuev, V; Papavassiliou, V; Park, I H; Park, J; Park, S K; Park, W J; Pate, S F; Pei, H; Peng, J-C; Pereira, H; Peresedov, V; Peressounko, D Yu; Petti, R; Pinkenburg, C; Pisani, R P; Proissl, M; Purschke, M L; Purwar, A K; Qu, H; Rak, J; Rakotozafindrabe, A; Ravinovich, I; Read, K F; Rembeczki, S; Reygers, K; Riabov, V; Riabov, Y; Richardson, E; Roach, D; Roche, G; Rolnick, S D; Rosati, M; Rosen, C A; Rosendahl, S S E; Rosnet, P; Rukoyatkin, P; Ružička, P; Rykov, V L; Sahlmueller, B; Saito, N; Sakaguchi, T; Sakai, S; Sakashita, K; Samsonov, V; Sano, S; Sato, T; Sawada, S; Sedgwick, K; Seele, J; Seidl, R; Semenov, A Yu; Semenov, V; Seto, R; Sharma, D; Shein, I; Shibata, T-A; Shigaki, K; Shimomura, M; Shoji, K; Shukla, P; Sickles, A; Silva, C L; Silvermyr, D; Silvestre, C; Sim, K S; Singh, B K; Singh, C P; Singh, V; Slunečka, M; Soldatov, A; Soltz, R A; Sondheim, W E; Sorensen, S P; Sourikova, I V; Staley, F; Stankus, P W; Stenlund, E; Stepanov, M; Ster, A; Stoll, S P; Sugitate, T; Suire, C; Sukhanov, A; Sziklai, J; Takagui, E M; Taketani, A; Tanabe, R; Tanaka, Y; Taneja, S; Tanida, K; Tannenbaum, M J; Tarafdar, S; Taranenko, A; Tarján, P; Themann, H; Thomas, D; Thomas, T L; Togawa, M; Toia, A; Tomášek, L; Tomita, Y; Torii, H; Towell, R S

    2011-09-30

    We present measurements of J/ψ yields in d+Au collisions at sqrt[s(NN)]=200  GeV recorded by the PHENIX experiment and compare them with yields in p+p collisions at the same energy per nucleon-nucleon collision. The measurements cover a large kinematic range in J/ψ rapidity (-2.2nuclear shadowing combined with final state breakup and one with coherent gluon saturation effects. In order to remove model dependent systematic uncertainties we also compare the data to a simple geometric model. The forward rapidity data are inconsistent with nuclear modifications that are linear or exponential in the density weighted longitudinal thickness, such as those from the final state breakup of the bound state.

  12. Dose estimative in operators during petroleum wells logging with nuclear wireless probes through computer modelling; Estimativa da dose em operadores durante procedimentos de perfilagem de pocos de petroleo com sondas wireless nucleares atraves de modelagem computacional

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Edmilson Monteiro de; Silva, Ademir Xavier da; Lopes, Ricardo T., E-mail: emonteiro@nuclear.ufrj.b, E-mail: ademir@nuclear.ufrj.b, E-mail: ricardo@lin.ufrj.b [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear; Lima, Inaya C.B., E-mail: inaya@lin.ufrj.b [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear; Instituto Politecnico do Rio de Janeiro (IPRJ/UERJ), Nova Friburgo, RJ (Brazil); Correa, Samanda Cristine Arruda, E-mail: scorrea@cnen.gov.b [Comissao Nacional de Energia Nuclear (DIAPI/CGMI/CNEN), Rio de Janeiro, RJ (Brazil); Rocha, Paula L.F., E-mail: ferrucio@acd.ufrj.b [Universidade Federal do Rio de Janeiro (UFRJ)., RJ (Brazil). Dept. de Geologia

    2011-10-26

    This paper evaluates the absorbed dose and the effective dose on operators during the petroleum well logging with nuclear wireless that uses gamma radiation sources. To obtain the data, a typical scenery of a logging procedure will be simulated with MCNPX Monte Carlo code. The simulated logging probe was the Density Gamma Probe - TRISOND produced by Robertson Geolloging. The absorbed dose values were estimated through the anthropomorphic simulator in male voxel MAX. The effective dose values were obtained using the ICRP 103

  13. Survey or quality for radiopharmaceuticals and activimeters available in services of nuclear medicine from Recife, Pernambuco State, Brazil; Estudo da qualidade dos radiofarmacos e dos activimetros utilizados nos servicos de medicina nuclear do Recife

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Fernanda Maria Dornellas Camara

    2001-08-01

    The radiopharmaceutical used in Nuclear Medicine must present high chemical and radiochemical purities in order to obtain images with contrast and clearness adequate for the diagnosis. Test should be made by the Nuclear Medicine institutes to evaluate the presence of molybdenum, aluminium and the free Tc O{sub 4}{sup -}/TC-HR in the radiopharmaceutical before they use it. On the other hand, the activity to be administered to the patient is determined by the activimeters available in the Nuclear Medicine institutions. So it is necessary to perform tests to verify operating conditions of the activimeter to guarantee that the dose received by patient is the prescribed by the physician. In Brazil, few clinics of Nuclear Medicine are implanting the tests of the radiopharmaceutical and of the activimeters. The objective of this work is to establish the procedures for the radiopharmaceutical tests and to evaluate the quality of the radiopharmaceutical used at the clinics of Recife, as well as the operation conditions of the activemeters in these institutions. The results show that all the activimeters analyzed present a good performance and that the equipment with Geiger-Muller detectors present larger instability than the ones that use ionization chamber. Concerning the Mo/Tc generators, it was observed that only one presented Mo in the generator eluate with concentration over the acceptable limits and that the concentration of Al found in the samples analyzed were below the limits. On the other hand, in 73% of the MIBI analyzed samples were observed problems with its preparation that were caused by the procedures adopted at the clinics, which do not follow the manufacturers recommendations. (author)

  14. Nuclear magnetic resonance system with continuous flow of polarized water to obtain the traceability to static magnetic fields; Sistema de ressonancia magnetica nuclear com fluxo continuo de agua polarizada para obtencao da rastreabilidade para campos magneticos estaticos

    Energy Technology Data Exchange (ETDEWEB)

    Martin, Ramon Valls; Nazarre, Diego Joriro, E-mail: ramon@ipt.br [Instituto de Pesquisas Tecnologicas (IPT), Sao Paulo, SP (Brazil)

    2013-07-01

    We have developed a system to obtain the traceability of field or magnetic induction intensity in the range of 2 μT up to 2 T, even in the presence of magnetic field gradients or noisy environments. The system is based on a nuclear magnetic resonance magnetometer, built in streaming water. The calibration procedure of a coil for magnetic field generation is described, as well as the results obtained and the estimated uncertainty (author)

  15. 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)

  16. A model of objects based on KKS for the processing of alarms at the Angra 2 nuclear power plant; Um modelo de objetos baseado em KKS para o processamento de alarmes da usina nuclear de Angra 2

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Paulo Adriano da

    2000-03-01

    The purpose of this work is to present a new model of the alarm annunciation system of the Angra 2 nuclear power plant, using concepts of object based modeling and having as basic the Angra 2 Systems and Components Identification System - KKS. The present structure of the Computerized Alarm System - CAS of Angra 2 does not permit a fast visualization of the incoming alarms in case that a great number of them go off, because the monitors can only show 7 indications at a time. The herein proposed model permits a fast identification of the generated alarms, making possible for the operator to have a general view of the current nuclear power plant status. Its managing tree structure has an hierarchical dependence among its nodes, from where, the presently activated alarms are shown. Its man-machine interface is easy interaction and understand because it is based on structure well known by the Angra 2 operators which is the Angra 2 Systems and Components Identification System - KKS. The project was implemented in the format of an Angra 2 Alarms Supervision System (SSAA), and, for purpose of simulation, 5 system of the Angra 2 Nuclear Power Plant have been chosen. The data used in the project like measurement KKS, measurement limits, unity, setpoints, alarms text and systems flow diagrams, are actual data of the Angra 2 Nuclear Power Plant. The Visual Basic programming Language has been used, with emphasis to the object oriented programming, which and modification, without modifying the program code. Event hough using the Visual Basic for programming, the model has shown, for its purpose, a satisfactory real time execution. (author)

  17. Nuclear Information Center: 25 years of CNEN in the support of science and technology; Centro de Informacoes Nucleares: 25 anos de apoio da CNEN a area de ciencia e tecnologia

    Energy Technology Data Exchange (ETDEWEB)

    Sayao, Luiz Fernando; Monteiro de Barros, Anna Christina T. [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil). Centro de Informacoes Nucleares

    1995-05-01

    The 25 years of the Nuclear Information Centre of the Brazilian Nuclear Energy Commission - CIN/CNEN, and the role played in the context of Brazilian scientific and technological development is analyzed under two points of view: as database producer and information services provider as well as generator of knowledge and technology in the field of Information Science. The pioneer role of the Centre, not only in developing software for bibliographic information handling and in building a marketing model to information services but also contributing for the growth of database usage culture in Brazil is described. Cooperation, decentralization and sharing of resources are emphasized as the main characteristics of the work developed by the CIN/CNEN staff. Finally, the international background of CIN/CNEN coordinating Latin-American Projects as well as an active member of INIS - International Nuclear Information System, IAEA and more recently as the Brazilian representative to ETDE - Energy Technology Data Exchange is shown. IEA energy database is also discussed. (author) 1 tab., 4 figs.

  18. Social representation for future teachers on the nuclear energy: probable implications of the public opinion; Representacoes sociais de futuros professores a respeito da energia nuclear: possiveis implicacoes na opiniao publica

    Energy Technology Data Exchange (ETDEWEB)

    Ayllon, Rafaella Menezes; Farias, Luciana Aparecida, E-mail: rafaellayllon@hotmail.com [Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP (Brazil); Favaro, Deborah I.T., E-mail: ditfavaro@yahoo.com.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2013-07-01

    This study aimed to study the SR (social representation) regarding the 'Nuclear Energy' (NW) and 'Nuclear Chemistry' (NC) of students of Science - Bachelor of Federal University of Sao Paulo - UNIFESP. Individual questionnaires to research the topic, followed by the presentation of seminars with the focus of the research were applied. The methodology used was the technique of free word (Abric ,1994) which gives the frequency of each element that was mentioned and their average order of evocation, as well as semi -structured questionnaire with questions. Among the first results, it was found that the words 'Bomb' and 'Reactor' were the most mentioned by the group when asked evocations related to 'NE', while the terms 'Health' and 'Safety' are among the least mentioned. When referring to 'NC' the most frequent terms were 'Chemistry' and 'Atoms/Elements and 'Reactor' and 'Development' were less frequent. However, even though as a possible central core elements that match a negative SR theme, these students indicated Nuclear Energy as a strong option/option for diversifying the Brazilian energy matrix.

  19. The role of nuclear emulsions in the institutionalization of research in experimental physics in Brazil; O papel das emulsoes nucleares na institucionalizacao da pesquisa em fisica experimental no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Cassio Leite [Instituto Ciencia Hoje, Rio de Janeiro, RJ (Brazil); Videira, Antonio A.P. [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brasilia, DF (Brazil)

    2011-07-01

    In this paper, we describe and analyze the introduction and the use of the nuclear emulsions technique in Brazil. Even though consistent researches in cosmic ray physics had been done since the forties of the last century in this country, physicists here only began using this technique after Cesar Lattes' works in Bristol (England) and Berkeley (US). Despite being the implantation of the technique in this country posterior to the origin of the method itself dated from late 1900s, Brazilian scientists were quickly familiarized with it and adopted it not only in cosmic rays, but also in particle physics and nuclear physics, employing it until recently. In our work, we will be concerned with the reasons of this longevity. In other words, why were the nuclear emulsions technique employed for so many years in Brazil, even after its vanishing in physics researches centers in the world? We advance here that the answer to this question involves the institutionalization of science in Brazil mainly physics and economical, social, and geographic reasons. (author)

  20. Public perception on the benefits and risks of nuclear power plants. A simplified study; Um estudo simplificado da percepcao publica dos beneficios e riscos de centrais termonucleares

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro Junior, Joaquim Apparecido

    2007-07-01

    Public acceptance of the nuclear based electricity generation depends on many variables that can be affected by circumstances and interests, which although seemingly not close to the issue, can strongly influence the final outcome. Explicit or consented positions assumed by opinion makers and some segments of society are subject to episodic waves of interaction through the media and they permeate to the public in a process that is very complex to be fully understood. The modeling of such process is a very complicated undertaking, and gives no assurance of practical results concerning to what, how and who, should be given prominence in the interactions with the media and the general public. In this context, the risk communication has assumed a leading role and, as a consequence, most of the interaction with the public has been done with both defensive language and content. This study has tried a simple and practical approach to the problem, in such a way as to gather some interesting subsidies to treat this issue in a different way. The basic assumption is that in a similar way as individuals base their decision to acquire a new good or service on a 'intuitive' cost-benefit judgment, society (as a collection of individuals) also manifest their acceptance (or not) with respect to industrial installations and undertakings by comparing risks and benefits according to their perception. An exploratory survey was carried out in a few high schools, colleges and MBA courses in the state of Sao Paulo, Brazil. A first part was aimed to catch and understand the public perception of: the intrinsic value of the electric energy, the need to universalize the access to electricity, nuclear plants, the acceptance deficit of nuclear power as compared to other sources of energy, the benefits a nuclear plant can bring and who does and who does not deserves credibility to speak about nuclear plants. The second part was addressed to grasp a picture of more relevant distortions

  1. Avaliação da interação da glutaminase isoforma "kidney-type" (KGA) com o receptor nuclear "peroxisome proliferator-activated receptor gamma" (PPAR -gama)

    OpenAIRE

    2016-01-01

    Os processos celulares são largamente mediados pela interação entre proteínas. Além disso, interações da mesma proteína com diferentes parceiros podem levar a respostas de natureza distinta na célula, muitas vezes envolvendo processos antes não previstos para a mesma. A enzima glutaminase é responsável pela conversão de glutamina em glutamato reabastecendo o ciclo do ácido tricarboxílico (TCA) e dando suporte ao seu funcionamento e geração de metabólitos essenciais para a síntese de macromolé...

  2. Evaluation of radiochemistry purity and p H of radiopharmaceuticals in nuclear medicine services at Pernambuco, Brazil; Avaliacao da pureza radioquimica e pH de radiofarmacos em servicos de medicina nuclear de Pernambuco, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Wellington; Lima, Fabiana Farias de, E-mail: falima@cnen.gov.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Santos, Poliane A.L.; Lima, Fernando Roberto de Andrade; Lima, Fabiana Farias de, E-mail: fflima@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2011-07-01

    Radiopharmaceuticals are cellular or molecular structures that have a radionuclide in its composition and they are used for diagnosing or treating diseases. The evaluation of the radiochemical purity of radiopharmaceuticals is essential to produce images with artifacts free, as well as avoid unnecessary absorbed dose to the patient. Since they are administered in humans is important and necessary that they undergo rigorous quality control. Due to this fact, the norm in ANVISA RDC 38/2008 declaring the mandatory completion of a minimum of tests in routine nuclear medicine services before human administration. (author)

  3. Proficiency tests for evaluation of the {sup 99}Tc{sup m} measurements in the nuclear medicine; Aplicacao de teste de proficiencia para avaliacao da medicao de {sup 99}Tc{sup m} na medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Iwahara, Akira; Tauhata, Luiz; Oliveira, Antonio Eduardo de, E-mail: iwahara@ird.gov.b, E-mail: tauhata@ird.gov.b, E-mail: aedu@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Nicoli, Ieda Gomes, E-mail: ieda@ird.gov.b [Comissao Nacional de Energia Nuclear (CNEN/DF), Brasilia, DF (Brazil). Escritorio de Brasilia; Alabarse, Frederico Gil; Xavier, Ana Maria, E-mail: falabarse@ird.gov.b, E-mail: axavier@ird.gov.b [Comissao Nacional de Energia Nuclear (ESPOA/CNEN-RS), Porto Alegre, RS (Brazil). Escritorio de Porto Alegre

    2009-07-01

    This work performs the performance evaluation of 55 Brazilian nuclear medicine services in activity measurement of radiopharmaceutical containing {sup 99}Tc{sup m}. Proficiency tests based on the acceptance criteria of the Regulation ISO/IEC Guide 43-1 and on the accuracy of the brazilian Regulation CNEN-NN-3.05 were applied in 63 results of activity measurements in radionuclide calibrators used by those services. The performance services has shown that the criteria of the ISO/IEC 43-1, nevertheless to be more restrictive, presents results very consistent with the accuracy criteria requested by the Brazilian regulation

  4. Application of genetic algorithms to the maintenance scheduling optimization in a nuclear system basing on reliability; Aplicacao de algoritmos geneticos na otimizacao da politica de manutencoes preventivas de um sistema nuclear centrada em confiabilidade

    Energy Technology Data Exchange (ETDEWEB)

    Lapa, Celso M. Franklin; Pereira, Claudio M.N.A.; Mol, Antonio C. de Abreu [Instituto de Engenharia Nuclear (IEN), Rio de Janeiro, RJ (Brazil)

    1999-07-01

    This paper presents a solution based on genetic algorithm and probabilistic safety analysis that can be applied in the optimization of the preventive maintenance politic of nuclear power plant safety systems. The goal of this approach is to improve the average availability of the system through the optimization of the preventive maintenance scheduling politic. The auxiliary feed water system of a two loops pressurized water reactor is used as a sample case, in order to demonstrate the effectiveness of the proposed method. The results, when compared to those obtained by some standard maintenance politics, reveal quantitative gains and operational safety levels. (author)

  5. Collective dose estimation in Portuguese population due to medical exams of diagnostic radiology and nuclear medicine; Estimativa da dose coletiva na populacao portuguesa devido a exames medicos de radiologia de diagnostico e de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Teles, Pedro; Vaz, Pedro [Instituto Tecnologico e Nuclear, Sacavem (Portugal). Instituto Superior Tecnico; Sousa, M. Carmen de [Instituto Portugues de Oncologia de Coimbra (Portugal); Paulo, Graciano; Santos, Joana [Escola Superior de Tecnologia da Saude de Coimbra (Portugal); Pascoal, Ana [Kings College Hospital, London (United Kingdom). Kings Health Partners; Cardoso, Gabriela; Santos, Ana isabel [Hospital Garcia de Orta, Almada (Portugal); Lanca, Isabel [Administracao Regional de Saude, Coimbra (Portugal); Matela, Nuno [Universidade de Lisboa (Portugal). Fac. de Ciencias. Instituto de Biofisica e Engenharia Biomedica; Janeiro, Luis [Escola superior de Saude da Cruz Vermelha Portuguesa, Lisboa (Portugal); Sousa, Patrick [Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Lisboa (Portugal); Carvoeiras, Pedro; Parafita, Rui [Medical Consult, SA, Lisboa (Portugal); Simaozinho, Paula [Administracao Regional de Saude, Faro (Portugal)

    2013-11-01

    In order to assess the exposure of the Portuguese population to ionizing radiation due to medical examinations of diagnostic radiology and nuclear medicine, a working group, consisting of 40 institutions, public and private, was created to evaluation the coletive dose in the Portuguese population in 2010. This work was conducted in collaboration with the Dose Datamed European consortium, which aims to assess the exposure of the European population to ionizing radiation due to 20 diagnostic radiology examinations most frequent in Europe (the 'TOP 20') and nuclear medicine examinations. We obtained an average value of collective dose of Almost-Equal-To 1 mSv/caput, which puts Portugal in the category of countries medium to high exposure to Europe. We hope that this work can be a starting point to bridge the persistent lack of studies in the areas referred to in Portugal, and to enable the characterization periodic exposure of the Portuguese population to ionizing radiation in the context of medical applications.

  6. Application of perturbation methods for sensitivity analysis for nuclear power plant steam generators; Aplicacao da teoria de perturbacao a analise de sensibilidade em geradores de vapor de usinas nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Gurjao, Emir Candeia

    1996-02-01

    The differential and GPT (Generalized Perturbation Theory) formalisms of the Perturbation Theory were applied in this work to a simplified U-tubes steam generator model to perform sensitivity analysis. The adjoint and importance equations, with the corresponding expressions for the sensitivity coefficients, were derived for this steam generator model. The system was numerically was numerically solved in a Fortran program, called GEVADJ, in order to calculate the sensitivity coefficients. A transient loss of forced primary coolant in the nuclear power plant Angra-1 was used as example case. The average and final values of functionals: secondary pressure and enthalpy were studied in relation to changes in the secondary feedwater flow, enthalpy and total volume in secondary circuit. Absolute variations in the above functionals were calculated using the perturbative methods, considering the variations in the feedwater flow and total secondary volume. Comparison with the same variations obtained via direct model showed in general good agreement, demonstrating the potentiality of perturbative methods for sensitivity analysis of nuclear systems. (author) 22 refs., 7 figs., 8 tabs.

  7. A simplified study of public perception in the nuclear field: suggestions for educational campaign for different segments of society; Um estudo simplificado sobre a percepcao publica na area nuclear: sugestoes para campanhas educativas para os diferentes segmentos da sociedade

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Renata Araujo de

    2011-07-01

    During the last years the need for the increase in the electricity energy production as much as in Brazil as in the rest of the world, has raised the tone o the debate about the environmental impacts as a result of these debates, the government and the Non-Governmental Organizations (NGO's) have requested several opinion researches aiming at measuring and evaluating the knowledge and perception of the public in relation to the best non-polluting energy sources. Prior to 2001 these researches would not make any sense in Brazil as the majority of its power grid is made of hydroelectric plants, a renewable energy source. However, when in that year it occurred a drought, the competent authorities have faced the necessity of developing a plan, the National Energy Plan (PNE2030) which recommends, among other objectives, finalizing the construction of the Angra 3 plant and the implementation Df new nuclear plants in places still to be determined. Even considering the complexity of the subject, this paper presents a field research realized from September 28th, 2010 to October 28th, 2010 of the current level of perception of the Brazilian population, specifically the residents of three cities of Rio de Janeiro, about the nuclear area. As a result of this work, it is suggested how the competent authorities should proceed to reach in an efficient manner, by means of communication campaigns both informative and educational, a greater understanding of the population about the proposed subject. (author)

  8. Small nuclear power reactor emergency electric power supply system reliability comparative analysis; Analise da confiabilidade do sistema de suprimento de energia eletrica de emergencia de um reator nuclear de pequeno porte

    Energy Technology Data Exchange (ETDEWEB)

    Bonfietti, Gerson

    2003-07-01

    This work presents an analysis of the reliability of the emergency power supply system, of a small size nuclear power reactor. Three different configurations are investigated and their reliability analyzed. The fault tree method is used as the main tool of analysis. The work includes a bibliographic review of emergency diesel generator reliability and a discussion of the design requirements applicable to emergency electrical systems. The influence of common cause failure influences is considered using the beta factor model. The operator action is considered using human failure probabilities. A parametric analysis shows the strong dependence between the reactor safety and the loss of offsite electric power supply. It is also shown that common cause failures can be a major contributor to the system reliability. (author)

  9. Forest structure of artificial islands in the Tucuruí dam reservoir in northern Brazil: a test core-area model Estrutura da floresta em ilhas artificiais no reservatório da usina hidrelétrica de Tucuruí, Brasil: um teste do modelo de área nuclear

    Directory of Open Access Journals (Sweden)

    Leandro V. Ferreira

    2012-06-01

    modelo de área nuclear (core-area model em uma paisagem de floresta fragmentada resultante da formação do lago da Usina Hidrelétrica de Tucucui na Amazônia. Foram medidas as variações na estrutura em 17 ilhas, com tamanhos variando de 8 a 100 hectares. Em cada ilha foram colocadas duas parcelas, a 1ª parcela a 30 metros da margem e a 2ª parcela a mais de 100 metros da margem da ilha. A densidade e a área basal de árvores, a densidade da regeneração natural e a cobertura do dossel da floresta não foram significativamente diferentes entre as parcelas da borda e do interior das ilhas. Também não foram encontradas diferenças significativas na densidade de lianas, no número de troncos mortos ou árvores danificadas entre as parcelas da borda e do interior das ilhas. A grande declividade do terreno das ilhas, a matriz circundante (água e a forma irregular da ilhas podem ser os fatores responsáveis me provocar a extensão do efeito de borda em todas as ilhas analisadas, independente do tamanho e grau de isolamento. Nós propomos um novo protocolo para avaliar os impactos ecológicos dos efeitos de borda em fragmentos de habitat criados artificialmente. Este protocolo envolve três etapas: (1 identificação dos táxons biológicos de particular interesse de conservação ou de gestão (2 medição das das variáveis responsaveis pela resposta dos táxons induzidas pelo efeito de borda e (3 Usar o modelo de área nuclear (core area model na extrapolação das variáveis medidas em situacões novas ou existentes.

  10. Nuclear Confidence

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The Fukushima nuclear accident provides valuable lessons for China national nuclear Corp.as it continues to expand its operations AS Japan’s Fukushima nuclear crisis sparks a global debate over nuclear safety,China National Nuclear Corp. (CNNC),the country’s largest nuclear plant operator, comes under the spotlight.

  11. Interpretation of the results from individual monitoring of workers at the Nuclear Fuel Fabrication Facility, Brazil; Interpretacao de resultados de monitoracao individual interna da Fabrica de Combustivel Nuclear - FCN

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Marcelo Xavier de

    2005-07-01

    In nuclear fuel fabrication facilities, workers are exposed to different compounds of enriched uranium. Although in this kind of facility the main route of intake is inhalation, ingestion may occur in some situations, and also a mixture of both. The interpretation of the bioassay data is very complex, since it is necessary taking into account all the different parameters, which is a big challenge. Due to the high cost of the individual monitoring programme for internal dose assessment in the routine monitoring programmes, usually only one type of measurement is assigned. In complex situations like the one described in this study, where several parameters can compromise the accuracy of the bioassay interpretation it is need to have a combination of techniques to evaluate the internal dose. According to ICRP 78 (1997), the general order of preference of measurement methodologies in terms of accuracy of interpretation is: body activity measurement, excreta analysis and personal air sampling. Results of monitoring of working environment may provide information that assists in the interpretation on particle size, chemical form, solubility and date of intake. A group of fifteen workers from controlled area of the studied nuclear fuel fabrication facility was selected to evaluate the internal dose using all different available techniques during a certain period. The workers were monitored for determination of uranium content in the daily urinary and faecal excretion (collected over a period of 3 consecutive days), chest counting and personal air sampling. The results have shown that at least two types of sensitivity techniques must be used, since there are some sources of uncertainties on the bioassay interpretation, like mixture of uranium compounds intake and different routes of intake. The combination of urine and faeces analysis has shown to be the more appropriate methodology for assessing internal dose in this situation. The chest counting methodology has not shown

  12. Study of the surface crystallization and resistance to dissolution of niobium phosphate glasses for nuclear waste immobilization; Estudo da cristalizacao superficial e da resistencia a dissolucao de vidros niobofosfatos visando a imobilizacao de rejeitos radioativos

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Heveline

    2008-07-01

    The surface crystallization and the dissolution rate of three phosphate glass compositions containing different amounts of niobium oxide were studied. The glasses were named Nb30, Nb37, and Nb44 according to the nominal content of niobium oxide in the glass composition. The three compositions were evaluated keeping the P{sub 2}O{sub 5}/K{sub 2}O ratio constant and varying the amount of Nb{sub 2}O{sub 5}. These glasses were produced by melting appropriate chemical compounds at 1500 deg C for 0.5 hour. The crystalline phases which were nucleated on the glass surface after heat treatment were determined by X-ray diffraction. The crystalline structures depend on the amount of niobium oxide in the glass composition. The crystal morphologies were observed by using an optical microscope, and their characteristics are specific for each kind of crystalline phase. The crystal growth rate and the surface nuclei density were determined for each glass composition, and they depend on each crystalline phase nucleated on the surface. From the differential thermal analysis curves it was determined that the Nb44 glass containing 46.5 mol por cent of niobium oxide is the most thermally stable against crystallization when compared to the Nb30 and Nb37 glasses. According to the activation energies determined for crystal growth on the surface of each glass type, the Nb44 glass can also be considered the most resistant one against crystallization. The dissolution rate for the Nb44 glass after 14 days immersed in an aqueous solution with pH equals to 7 at 90 deg C is the lowest (9.0 x 10{sup -7} g. cm{sup -2} . day{sup -1}) when compared to the other two glass compositions. The dissolution rates in acidic and neutral solutions of all studied glasses meet the international standards for materials which can be used in the immobilization of nuclear wastes. (author)

  13. Study of social responsibility of the Nuclear and Energy Research Institute of Sao Paulo (IPEN/CNEN-SP); Estudo da responsabilidade social do Instituto de Pesquisas Energeticas e Nucleares de Sao Paulo (IPEN/CNEN-SP)

    Energy Technology Data Exchange (ETDEWEB)

    Mutarelli, Rita de Cassia

    2014-07-01

    Over the years, the socio-environmental concept has grown through programs, conferences and several activities that have been held in Brazil and worldwide. Sustainability and social responsibility are now an integral part of everyday life of organizations The Instituto de Pesquisas Energeticas e Nucleares (IPEN), which is the focus of this research, is committed to the improvement of Brazilian quality of life. Based on IPEN's mission, and due to the lack of tools for assessing socio-environmental actions, this research aims to propose an assessment tool for social responsibility, which may also be a methodological resource committed to the improvement of the Institute. Through indicators and dimensions, a methodology to assess social responsibility and identify both strengths and weaknesses was designed. The methodology was administered to IPEN, and the results demonstrated positive aspects regarding actions towards the internal publics and negative aspects towards the external publics that require improvement. The results obtained were satisfactory. Nevertheless, as the subject of this study is a broad theme, further studies are suggested. IPEN's board may use the results of this research as a tool to help them identify feasible socio-environmental actions to be implemented in the institute. (author)

  14. Aid system in the attention direction for accidents diagnosis at nuclear power plants based on artificial intelligence; Sistema de auxilio para o direcionamento da atencao no diagnostico de acidentes em usinas nucleares baseado em inteligencia artificial

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Rafael Gomes da

    2009-07-01

    Transient identification in Nuclear Power Plant (NPP) is often a very hard task and may involve a great amount of human cognition. The early identification of unexpected departures from steady state behavior is an essential step for the operation, control and accident management in NPPs. The bases for the transient identification relay on the evidence that different system faults and anomalies lead to different pattern evolution in the involved process variables. During an abnormal event, the operator must monitor a great amount of information from the instruments that represents a specific type of event Several systems based on specialist systems, neural-networks, and fuzzy logic have been developed for transient identification. In the work, we investigate the possibility of using a Neuro Fuzzy modeling tool for efficient transient identification, aiming to helping the operator crew to take decisions relative to the procedure to be followed in situations of accidents/transients at NPPs. The proposed system uses artificial neural networks (ANN) as first level transient diagnostic After the ANN has done the preliminary transient type identification, a fuzzy-logic system analyzes the results emitting reliability degree of it. A preliminary evaluation of the developed system was made at the Human-System Interface Laboratory (LABIHS). The obtained results show that the system can help the operators to take decisions during transients/accidents in the plant (author)

  15. Hybrid instrument applied to human reliability study in event of loss of external electric power in a nuclear power plant; Instrumento hibrido aplicado ao estudo da confiabilidade humana em evento de perda de energia eletrica externa em usina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Eduardo Ferraz

    2015-04-01

    The study projects in highly complex installations involves robust modeling, supported by conceptual and mathematical tools, to carry out systematic research and structured the different risk scenarios that can lead to unwanted events from occurring equipment failures or human errors. In the context of classical modeling, the Probabilistic Safety Analysis (PSA) seeks to provide qualitative and quantitative information about the project particularity and their operational facilities, including the identification of factors or scenarios that contribute to the risk and consequent comparison options for increasing safety. In this context, the aim of the thesis is to develop a hybrid instrument (CPP-HI) innovative, from the integrated modeling techniques of Failure Mode and Effect Analysis (FMEA), concepts of Human Reliability Analysis and Probabilistic Composition of Preferences (PCP). In support of modeling and validation of the CPP-HI, a simulation was performed on a triggering event 'Loss of External Electric Power' - PEEE, in a Nuclear Power plant. The results were simulated in a virtual environment (sensitivity analysis) and are robust to the study of Human Reliability Analysis (HRA) in the context of the PSA. (author)

  16. Evaluation of occupational radiation dose in nuclear medicine: radiopharmaceutical administration to scintiscanning exams of myocardial perfusion; Avaliacao da dose de radiacao ocupacional em medicina nuclear: administracao de radiofarmacos em exames de cintilografria de perfusao miocardica

    Energy Technology Data Exchange (ETDEWEB)

    Komatsu, Cassio V., E-mail: cassiok@yahoo.com [Medicina Nuclear do Triangulo (MNT), Uberlandia, MG (Brazil); Michelin, Charlie A.; Jakubiak, Rosangela R., E-mail: charlie@utfpr.edu.br, E-mail: requi@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Lemes, Alyne O.; Silva, Juliana L.M., E-mail: alyne275@gmail.com, E-mail: jujumontesdocinho@gmail.com [Faculdade do Trabalho (FATRA), Uberlandia, MG (Brazil)

    2013-11-01

    In nuclear medicine, workers directly involved in exams are constantly exposed to ionizing radiation. The procedure for administration of the radiopharmaceutical to the patient is one of the most critical times of exposure. In tests of myocardial perfusion scintigraphy (MPS) administration of radiopharmaceutical repeats the steps of rest and cardiac stress. In this study, we used a Geiger -Mueller detector for measuring occupational radiation doses for during the administration of technetium- {sup 99m}- sestamibi in MPS tests. In the evaluation, discriminated the stages of examination and related professional experience time to doses measures at home. It were followed 110 procedures at home (55 conducted by professionals with over 5 years experience and 55 conducted by professionals with less than 1 year of experience) and 55 effort procedures. The results showed that the rest of the procedure time and dose are related to the experience of the worker. More experienced workers were faster (mean: 43 {+-} 16 vs 67 {+-} 25 seconds / procedure), and therefore received lower doses (mean 0.57 {+-} 0.16 versus 0.80 {+-} 0.24 {mu}Sv / procedure), both with statistical significance (p <0.001). In step effort, there were procedures lasting longer (mean: 19 {+-} 2 minutes / procedure), which resulted in higher doses (mean 3.0 {+-} 0.6 {mu}Sv / procedure)

  17. Nuclear safeguards; Salvaguardias nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Zurron, O.

    2015-07-01

    Safeguards control at the Juzbado Plant is implemented through the joint IAEA/EURATOM partnership approach in force within the European Union for all nuclear facilities. this verification agreement is designed to minimize burden on the operators whilst ensuring that both inspectorate achieve the objectives related to their respective safeguards regimes. This paper outlines the safeguards approaches followed by the inspectorate and the particularities of the Juzbado Plants nuclear material accountancy and control system. (Authors)

  18. Evaluation of '9{sup 9}Mo presence in eluates of {sup 99}mTc used in nuclear medicine; Avaliacao da presenca de {sup 99}Mo em eluatos de {sup 99m}Tc utilizados em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Bianca da Silva

    2010-07-01

    Tc-99m is used for diagnostic imaging in nuclear medicine through SPECT technique. It is obtained by the elution of {sup 99}Mo/{sup 99m}Tc generators. During the elution process {sup 99}Mo can be extracted becoming a radionuclidic impurity. One of the quality parameters of the eluate is the radionuclidic purity, MBT (molybdenum break through), defined as the ratio between {sup 99}Mo and {sup 99m}Tc activities in the eluate. The North-American and European pharmacopoeias restrict the {sup 99}Mo content, respectively, in 0.015 e 0.1% and, according to the International Atomic Energy Agency (IAEA), the activity ratio at the moment of administration of the radiopharmaceutical to the patient, should not exceed 0.015%. In Brazil, the control of such parameter is not obliged in official regulations. Thus, the objective of this work is to evaluate the occurrence of {sup 99}Mo in {sup 99m}Tc eluates. It was initially optimized a methodology to determine the activity of {sup 99}Mo in eluate samples. Efficiency curves were obtained for a NaI (Tl) 8'' x 4'' scintillation detector installed at the In Vivo Monitoring Laboratory (LABMIV-IRD). The methodology has been validated through the measurement of a {sup 99}Mo standard liquid source calibrated at the National Metrology Laboratory for Ionizing Radiation (LNMRI-IRD). The samples analyzed in this work were gently supplied by 5 Nuclear Medicine Clinics located in the city of Rio de Janeiro. The activities of {sup 99}mTc and {sup 99}Mo in those samples have been measured respectively at the clinics and at the LABMIV. By applying a standardized methodology, the ration between the activities were calculated. The results show that 147 out of 174 samples presented {sup 99}Mo activities above the minimum detectable activity of the technique. On the other hand, only 2 out of 147 samples surpassed the MBT limit suggested by the IAEA and have been detected in samples eluted from generators of 750 mCi. In one of the

  19. Determination of radiochemistry purity and pH of radiopharmaceutical in Northeast nuclear medicine services; Determinacao da pureza radioquimica e pH de radiofarmacos em servicos de medicina nuclear do Nordeste

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Wellington; Santos, Poliane, E-mail: wellington.gandrade@gmail.com, E-mail: polianeangelo@gmail.com [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Lima, Fernando de Andrade; Lima, Fabiana Farias de, E-mail: falima@cnen.gov.br, E-mail: ffmima@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2013-07-01

    The radiopharmaceutical is a chemical compound associated with a radionuclide, which is selected so that meets the need cf diagnosis and capable of producing quality images. Drugs labeled with {sup 99m}Tc radionuclide kits consist of lyophilized, and be handled by the nuclear medicine services (NMS) must pass tests as the resolution of ANVISA (RDC 38) published in 2008. Among these tests are those of radiochemical purity and pH determination. This study evaluated the radiochemical purity of radiopharmaceuticals and pH SMN manipulated in the Northeast. The radiochemical purity (RCP) was determined by thin layer chromatography, which were used Whatman Registered-Sign and silica gel, with dimensions of 1 x 10 cm, as stationary phase, and solvents indicated in the inserts of manufacturers. The chromatographic strips were placed in sealed containers so as not to touch the walls thereof. After the chromatographic run, the tape was cut every centimeter and the activities determined in doses of each calibrator NMS. The pH of the radiopharmaceutical was assessed through the use of universal pH paper (Merck Registered-Sign ) and obtained staining compared with its color scale. The results showed (hat 82.6% and 100% of the radiopharmaceuticals of the samples were within the limits recommended by international pharmacopoeias for radiochemical purity and pl-l, respectively. There is then the need to include in routine tests indicated SMN by ANVISA. Well, they can detect possible problems in the marking of radiopharmaceuticals administered to the patient and avoid inappropriate material. (author)

  20. Evaluation of the contamination risk by {sup 241}AM from lightning rods disposed at uncontrolled garbage dump; Avaliacao da contaminacao provocada por para-raios radioativos de americio-241 descartados em lixoes

    Energy Technology Data Exchange (ETDEWEB)

    Marumo, Julio Takehiro

    2006-07-01

    Radioactive lightning rods were manufactured in Brazil until 1989, when the licenses for using radioactive sources in these products were lifted by the national nuclear authority. Since then, radioactive devices have been replaced by Franklin type one and collected as radioactive waste. However, only 23 percent of the estimated total number of installed rods was delivered to Brazilian Nuclear Commission (Comissao Nacional de Energia Nuclear - CNEN). This situation is of concern as there is a possibility of the rods being discarded as domestic waste, considering that in Brazil, 63.6 percent of the municipal solid waste is disposed at uncontrolled garbage dump, according to Instituto Brasileiro de Geografia e Estatistica (IBGE) in 2000. In addition, americium, the most common employed radionuclide, is classified as a high toxicity element, when ingested or inhaled. In the present study, it was performed migration experiments of Am-241 by lysimeter system in order to evaluate the risk of contamination caused by radioactive lightning rods disposed as a common solid waste. Sources removed from lightning rods were placed inside lysimeters filled with organic waste, collected at the restaurant of Instituto de Pesquisas Energeticas e Nucleares, IPEN-CNEN/SP, and the generated leachate was periodically analyzed to determine its characteristics such as pH, redox potential, solid content and concentration of the radioactive material. Microbial growth was also evaluated by counting the number of colony forming units. The equivalent dose to members of the public has been calculated considering the ingestion of drinking water, the most probable mode of exposure. The final result was about 145 times below the effective dose limit of 1 mSv.year-1 for members of the public, established by the International Commission on Radiological Protection (ICRP), demonstrating that the risk caused by lightning rods disposed at uncontrolled garbage dump is low. (author)

  1. Nuclear physics

    Energy Technology Data Exchange (ETDEWEB)

    Sang, David (Bishop Luffa Comprehensive School, Chichester (UK))

    1990-01-01

    Nuclear Physics covers the aspects of radioactivity and nuclear physics dealt with in the syllabuses of all the A-level examination boards; in particular, it provides detailed coverage of the Joint Matriculation Board option in nuclear physics. It deals with the discovery of the atomic nucleus, the physics of nuclear processes, and nuclear technology. (author).

  2. {sup 18}F-fluorocholine production at Center of Nuclear Technology Development, Brazil: synthesis and in vitro cytotoxicity studies; Producao de {sup 18}F-fluorocolina no Centro de Desenvolvimento da Tecnologia Nuclear: sintese e estudos de citotoxicidade in vitro

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Flavia Mesquita

    2014-07-01

    {sup 18}F-fluorocholine ({sup 18}FCH) is promising biomarker for imaging of tumors using PET technology, being effective in the diagnosis of metastatic tumors and specific for the brain tumors, prostate, lung, among others. Despite already being used in some countries like France, Germany, Slovenia, Poland, Romania and Portugal, the {sup 18}FCH is not yet produced or marketed in Brazil. This work proposed the development of a new radiopharmaceutical based on choline labeled with {sup 18}F isotope for diagnostic PET imaging which is an increasing demand of the nuclear medicine national. It was also proposed the development of quality control assays in order to evaluate the radiopharmaceutical prior to its use in patients; in vitro test of toxicity in non-tumor cells (MRC-5), evaluating possible changes in cell proliferation caused by radiopharmaceutical impurities; and, to test the interaction's saturation of {sup 18}FCH with the tumor cells (PC-3 and U-87) and the competition with HC-3 and DMAE, performed to characterize the efficiency of the radiotracer uptake by tumor cells that express the choline transporter CHT. {sup 18}FCH was synthesized in two main steps, first by reaction with dibromomethane with fluoride-18, assisted by Kryptofix2.2.2, forming {sup 18}F-fluorobromomethane ({sup 18}FBrCH{sub 2}) and, then, the {sup 18}FBrCH{sub 2} reacted with the second precursor DMAE generating the final product, {sup 18}FCH. Synthesis duration was 45 minutes. {sup 18}FCH was obtained in 4.68 - 8.32% radiochemical yield, radiochemical purity greater than 99% and it was stable for up to 8 hours after production. The tested analytical methodologies were suitable for routine use in the quality control of {sup 18}FCH. The evaluation of the cytotoxic potential of impurities {sup 18}FCH, by clonogenic assay, showed that at the concentrations evaluated, the components do not alter the proliferative capacity of human healthy cells. The interaction of {sup 18}FCH with cell

  3. Nuclear ventriculography

    Science.gov (United States)

    ... ventriculography (RNV); Multiple gate acquisition scan (MUGA); Nuclear cardiology; Cardiomyopathy - nuclear ventriculography ... 56. Udelson JE, Dilsizian V, Bonow RO. Nuclear cardiology. In: Bonow RO, Mann DL, Zipes DP, Libby ...

  4. Nuclear Medicine.

    Science.gov (United States)

    Badawi, Ramsey D.

    2001-01-01

    Describes the use of nuclear medicine techniques in diagnosis and therapy. Describes instrumentation in diagnostic nuclear medicine and predicts future trends in nuclear medicine imaging technology. (Author/MM)

  5. The Bioethics National Commission in Chile: a pending task. Contributions from the experience of National Bioethics commissions of Mexico and Italy/La Comision Nacional de Bioetica de Chile: una tarea pendiente. Aportes de la experiencia de las Comisiones Nacionales de Bioetica de Mexico e Italia/A Comissao Nacional de Bioetica do Chile: uma tarefa pendente. Contribuicoes da experiencia das comissoes nacionais de bioetica do Mexico e da Italia

    National Research Council Canada - National Science Library

    Vergara, Paulina Ramos; Massa, Angela Arenas; Santos, Manuel J

    2015-01-01

    The aim of this study is to reflect on the origin, nature, integration and functions of National Bioethics Commissions of Mexico and Italy, with the goal to draw helpful experience for implementing...

  6. Nuclear Theory - Nuclear Power

    Science.gov (United States)

    Svenne, J. P.; Canton, L.; Kozier, K. S.

    2008-01-01

    The results from modern nuclear theory are accurate and reliable enough to be used for practical applications, in particular for scattering that involves few-nucleon systems of importance to nuclear power. Using well-established nucleon-nucleon (NN) interactions that fit well the NN scattering data, and the AGS form of the three-body theory, we have performed precise calculations of low-energy neutron-deuteron (n+d) scattering. We show that three-nucleon force effects that have impact on the low-energy vector analyzing powers have no practical effects on the angular distribution of the n+d cross-section. There appear to be problems for this scattering in the evaluated nuclear data file (ENDF) libraries, at the incident neutron energies less than 3.2 MeV. Supporting experimental data in this energy region are rather old (>25 years), sparse and often inconsistent. Our three-body results at low energies, 50 keV to 10.0 MeV, are compared to the ENDF/B-VII.0 and JENDL (Japanese Evaluated Nuclear Data Library) -3.3 evaluated angular distributions. The impact of these results on the calculated reactivity for various critical systems involving heavy water is shown.

  7. Projeto de pesquisa Energia Nuclear

    Directory of Open Access Journals (Sweden)

    Marcelo Henrique Barbosa Fiori

    2011-07-01

    Full Text Available Esse  projeto tem como intuito mostrar como pode se útil a utilização da energia nuclear para o abastecimento elétrico de uma escola. Mostrando que a energia nuclear é sim uma fonte viável de produção de energia “[...] meio quilo de urânio, do tamanho da ponta do meu dedo se você conseguir liberar toda a energia equivale a 5.000 barris de petróleo”.

  8. Projeto de pesquisa Energia Nuclear

    OpenAIRE

    Marcelo Henrique Barbosa Fiori

    2011-01-01

    Esse  projeto tem como intuito mostrar como pode se útil a utilização da energia nuclear para o abastecimento elétrico de uma escola. Mostrando que a energia nuclear é sim uma fonte viável de produção de energia “[...] meio quilo de urânio, do tamanho da ponta do meu dedo se você conseguir liberar toda a energia equivale a 5.000 barris de petróleo”.

  9. Nuclear control

    Energy Technology Data Exchange (ETDEWEB)

    Yoon, Wan Kee [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1995-02-01

    International cooperation in nuclear industries requires nuclear control as prerequisites. The concept of nuclear control is based on the Treaty on the Non-proliferation of Nuclear Weapon (NPT). The International Atomic Energy Agency (IAEA) plays central role in implementing nuclear control. Nuclear control consists of nuclear safeguards, physical protection, and export/import control. Each member state of NPT is subject to the IAEA`s safeguards by concluding safeguards agreements with the IAEA. IAEA recommends member states to implement physical protection on nuclear materials by `The Physical Protection of Nuclear Material` and `The Convention on the Physical Protection of Nuclear Material` of IAEA. Export/Import Control is to deter development of nuclear weapons by controlling international trade on nuclear materials, nuclear equipments and technology. Current status of domestic and foreign nuclear control implementation including recent induction of national inspection system in Korea is described and functions of recently set-up Technology Center for Nuclear Control (TCNC) under the Korea Atomic Energy Research Institute (KAERI) are also explained. 6 tabs., 11 refs. (Author).

  10. Problemas da sociologia da arte

    OpenAIRE

    Bastide, Roger

    2006-01-01

    A partir de um balanço das realizações consideradas pelo autor como as mais relevantes no campo da sociologia da arte até o final dos anos de 1940, o texto propõe novos rumos para a disciplina, considerando o modo como a arte é socialmente produzida como linguagem e valor.

  11. Nuclear research reactors in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Cota, Anna Paula Leite; Mesquita, Amir Zacarias, E-mail: aplc@cdtn.b, E-mail: amir@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2011-07-01

    The rising concerns about global warming and energy security have spurred a revival of interest in nuclear energy, giving birth to a 'nuclear power renaissance' in several countries in the world. Particularly in Brazil, in the recent years, the nuclear power renaissance can be seen in the actions that comprise its nuclear program, summarily the increase of the investments in nuclear research institutes and the government target to design and build the Brazilian Multipurpose research Reactor (BMR). In the last 50 years, Brazilian research reactors have been used for training, for producing radioisotopes to meet demands in industry and nuclear medicine, for miscellaneous irradiation services and for academic research. Moreover, the research reactors are used as laboratories to develop technologies in power reactors, which are evaluated today at around 450 worldwide. In this application, those reactors become more viable in relation to power reactors by the lowest cost, by the operation at low temperatures and, furthermore, by lower demand for nuclear fuel. In Brazil, four research reactors were installed: the IEA-R1 and the MB-01 reactors, both at the Instituto de Pesquisas Energeticas Nucleares (IPEN, Sao Paulo); the Argonauta, at the Instituto de Engenharia Nuclear (IEN, Rio de Janeiro) and the IPR-R1 TRIGA reactor, at the Centro de Desenvolvimento da Tecnologia Nuclear (CDTN, Belo Horizonte). The present paper intends to enumerate the characteristics of these reactors, their utilization and current academic research. Therefore, through this paper, we intend to collaborate on the BMR project. (author)

  12. Nuclear research reactors in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Cota, Anna Paula Leite; Mesquita, Amir Zacarias, E-mail: aplc@cdtn.b, E-mail: amir@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2011-07-01

    The rising concerns about global warming and energy security have spurred a revival of interest in nuclear energy, giving birth to a 'nuclear power renaissance' in several countries in the world. Particularly in Brazil, in the recent years, the nuclear power renaissance can be seen in the actions that comprise its nuclear program, summarily the increase of the investments in nuclear research institutes and the government target to design and build the Brazilian Multipurpose research Reactor (BMR). In the last 50 years, Brazilian research reactors have been used for training, for producing radioisotopes to meet demands in industry and nuclear medicine, for miscellaneous irradiation services and for academic research. Moreover, the research reactors are used as laboratories to develop technologies in power reactors, which are evaluated today at around 450 worldwide. In this application, those reactors become more viable in relation to power reactors by the lowest cost, by the operation at low temperatures and, furthermore, by lower demand for nuclear fuel. In Brazil, four research reactors were installed: the IEA-R1 and the MB-01 reactors, both at the Instituto de Pesquisas Energeticas Nucleares (IPEN, Sao Paulo); the Argonauta, at the Instituto de Engenharia Nuclear (IEN, Rio de Janeiro) and the IPR-R1 TRIGA reactor, at the Centro de Desenvolvimento da Tecnologia Nuclear (CDTN, Belo Horizonte). The present paper intends to enumerate the characteristics of these reactors, their utilization and current academic research. Therefore, through this paper, we intend to collaborate on the BMR project. (author)

  13. Nuclear Scans

    Science.gov (United States)

    Nuclear scans use radioactive substances to see structures and functions inside your body. They use a special ... images. Most scans take 20 to 45 minutes. Nuclear scans can help doctors diagnose many conditions, including ...

  14. Nuclear Chemistry.

    Science.gov (United States)

    Chemical and Engineering News, 1979

    1979-01-01

    Provides a brief review of the latest developments in nuclear chemistry. Nuclear research today is directed toward increased activity in radiopharmaceuticals and formation of new isotopes by high-energy, heavy-ion collisions. (Author/BB)

  15. Nuclear weapons, nuclear effects, nuclear war

    Energy Technology Data Exchange (ETDEWEB)

    Bing, G.F.

    1991-08-20

    This paper provides a brief and mostly non-technical description of the militarily important features of nuclear weapons, of the physical phenomena associated with individual explosions, and of the expected or possible results of the use of many weapons in a nuclear war. Most emphasis is on the effects of so-called ``strategic exchanges.``

  16. Nuclear Ambitions

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    China will begin to build the world’s first third-generation nuclear power plant at the Sanmen Nuclear Power Project in Sanmen City, coastal Zhejiang Province, in March 2009, accord-ing to the State Nuclear Power Technology Corp.

  17. Nuclear structure

    CERN Document Server

    Nazarewicz, W

    1999-01-01

    Current developments in nuclear structure are discussed from a theoretical perspective. The studies of the nuclear many-body system provide us with invaluable information about the nature of the nuclear interaction, nucleonic correlations at various energy-distance scales, and the modes of the nucleonic matter.

  18. Efeito do número da passagem e do gênero das células doadoras de núcleo no desenvolvimento de bovinos produzidos por transferência nuclear Effect of culture time and gender of nuclei donor cells on bovine development produced by nuclear transfer

    Directory of Open Access Journals (Sweden)

    Giovana Krempel Fonseca Merighe

    2010-10-01

    Full Text Available Objetivou-se com este trabalho avaliar o efeito do número da passagem e do sexo das células doadoras de núcleo no desenvolvimento embrionário e fetal após transferência nuclear. Para isso, oócitos bovinos foram maturados, enucleados e reconstruídos com células somáticas de animal adulto. Após a fusão e ativação química, os zigotos reconstituídos foram cultivados em Charles Rosenkranz 2 (CR2 com monocamada de células da granulosa a 38,8ºC em atmosfera umidificada a 5% de CO2 em ar, durante sete dias, e transferidos para receptoras sincronizadas. As taxas de clivagem e desenvolvimento a blastocisto de embriões reconstruídos com células cultivadas por tempo maior foram inferiores às obtidas com os demais tempos de cultivo. Além disso, os blastocistos produzidos não resultaram no desenvolvimento de uma gestação a termo. Embora a taxa de clivagem em embriões fêmeas tenha sido maior, o número de embriões que atingiram o estádio de blastocisto foi maior nos embriões machos. No período gestacional, fêmeas apresentaram maior taxa de aborto entre 90 e 120 dias de gestação. Esses resultados indicam que células doadoras de núcleos cultivados por longos períodos dificultam a produção de blastocistos e aumentam as chances de perdas durante a gestação. Embriões clonados machos têm maior competência para se desenvolver a blastocisto e resultam em menor taxa de perda gestacional.The objective of this study was to evaluate the effects of culture time and sex of nuclei donor cells on embryo and fetal development after nuclear transfer. Thus, bovine oocytes were matured, enucleated and reconstructed with somatic cells from an adult animal. After fusion and chemical activation, the reconstituted zygotes were cultured in Charles Rosenkranz 2 (CR2 on a granular monolayer cell at 38.8ºC in a humidified atmosphere 5% CO2 in air for seven days, and transferred to synchronized receptors. Cleavage rates and development to

  19. A importância da contra-imunoeletroforese na detecção de antígenos nucleares extraíveis para o diagnóstico de doenças reumáticas sistêmicas The importance of counterimmunoelectrophoresis in the detection of extractable nuclear antigens for the diagnosis of systemic rheumatic diseases

    Directory of Open Access Journals (Sweden)

    Rita de Cassia Siqueira Bruder

    2004-02-01

    Full Text Available Os antígenos nucleares extraíveis (ENAs são encontrados no soro da maioria dos pacientes com doença reumática sistêmica. Os principais ENAs estudados são SS-A/Ro, SS-B/La, RNP, Sm, Scl-70 e Jo-1. Objeti-vou-se neste trabalho: a padronizar a técnica de contra-imunoeletroforese (CIE para a detecção de ENAs; b padronizar o substrato antigênico (ENAs para a CIE a partir de baço de cão; c comparar os resultados da CIE com as técnicas de imunofluorescência indireta (IFI e Elisa para esses antígenos. Para tal foram estudados 40 soros de pacientes com doença reumática sistêmica confirmada por exames clínico e laboratorial (sorológico e biópsia. Como controle negativo foram utilizados dez soros de doadores de sangue normais, e, como controles positivos, seis soros-padrão anti-Ro, anti-La, anti-RNP, anti-Sm, anti-Scl-70, anti-Jo-1, para caracterizar os antígenos presentes no extrato de baço. Neste último foram detectados vários ENAs, exceto RNP e Scl-70. A técnica de CIE apresentou boas sensibilidade (70% e especificidade (100% em relação às outras técnicas (IFI e Elisa. A titulação dos soros pela CIE revelou positividade até diluições de 1:16 em 32,5% dos casos. Concluímos que a CIE e os antígenos extraídos de baço de cão podem ser utilizados na rotina laboratorial para triagem destes ENAs, com a vantagem, em relação à IFI, de poderem ser titulados.Extractable nuclear antigens (ENAs are detected in the sera of the majority of patients with rheumatic systemic disease. The main ENAs studied are SS-A/Ro, SS-B/La, RNP, Sm, Scl-70 and Jo-1. The aim of this work was: a to standardize the counterimmunoelectrophoresis technique (CIE to detect ENAs; b to standardize the extration of ENAs from dog spleen as a substract for CIE test; c to compare the results obtained by CIE with those of indirect immunofluorescence (IFI and Elisa for these antigens. Forty sera from individuals with rheumatic systemic disease confirmed by

  20. Nuclear spectroscopy

    CERN Document Server

    Ajzenberg-Selove, Fay

    1960-01-01

    Nuclear Spectroscopy, Part B focuses on the ways in which experimental data may be analyzed to furnish information about nuclear parameters and nuclear models in terms of which the data are interpreted.This book discusses the elastic and inelastic potential scattering amplitudes, role of beta decay in nuclear physics, and general selection rules for electromagnetic transitions. The nuclear shell model, fundamental coupling procedure, vibrational spectra, and empirical determination of the complex potential are also covered. This publication is suitable for graduate students preparing for exper

  1. Expression of a 74-kDa nuclear factor 1 (NF1) protein is induced in mouse mammary gland involution. Involution-enhanced occupation of a twin NF1 binding element in the testosterone-repressed prostate message-2/clusterin promoter.

    Science.gov (United States)

    Furlong, E E; Keon, N K; Thornton, F D; Rein, T; Martin, F

    1996-11-22

    Testosterone repressed prostate message-2 (TRPM-2)/clusterin gene expression is rapidly induced in early involution of the mouse mammary gland, after weaning, and in the rat ventral prostate, after castration. A search for involution-enhanced DNaseI footprints in the proximal mouse TRPM-2/clusterin gene promoter led to the identification and characterization (by DNase I footprinting and EMSA) of a twin nuclear factor 1 (NF1) binding element at -356/-309, relative to the proposed transcription start site; nuclear extracts from 2-day involuting mouse mammary gland showed an enhanced footprint over the proximal NF1 element; extracts from involuting prostate showed enhanced occupancy of both NF1 binding elements. Subsequent EMSA and Western analysis led to the detection of a 74-kDa NF1 protein whose expression is triggered in early involution in the mouse mammary gland; such an induced protein is not found in the involuting rat ventral prostate. This protein was not found in lactation where three other NF1 proteins of 114, 68, and 46 kDa were detected. Reiteration of the epithelial cell apoptosis associated with early mammary gland involution, in vitro, in a primary cell culture system, triggered the appearance of the 74-kDa NF1. Overlaying the cells with laminin-rich extracellular matrix suppressed the apoptosis and the expression of the 74-kDa NF1 and, in the presence of lactogenic hormones, initiated milk protein gene expression and the expression of two of the lactation-associated NF1 proteins (68 and 46 kDa). This study, thus, identifies for the first time the occurrence of a switch in expression of different members of the family of NF1 transcription factors as mammary epithelial cells move from the differentiated to the involution/apoptotic state, and it is likely that the involution-specific 74-kDa NF1 accounts for the enhanced NF1 footprint detected on the TRPM-2/clusterin promoter with extracts of mouse mammary gland.

  2. Nuclear Fission

    Science.gov (United States)

    Denschlag, J. O.

    This chapter first gives a survey on the history of the discovery of nuclear fission. It briefly presents the liquid-drop and shell models and their application to the fission process. The most important quantities accessible to experimental determination such as mass yields, nuclear charge distribution, prompt neutron emission, kinetic energy distribution, ternary fragment yields, angular distributions, and properties of fission isomers are presented as well as the instrumentation and techniques used for their measurement. The contribution concentrates on the fundamental aspects of nuclear fission. The practical aspects of nuclear fission are discussed in http://dx.doi.org/10.1007/978-1-4419-0720-2_57 of Vol. 6.

  3. Nuclear Safety

    Energy Technology Data Exchange (ETDEWEB)

    Silver, E G [ed.

    1989-01-01

    This document is a review journal that covers significant developments in the field of nuclear safety. Its scope includes the analysis and control of hazards associated with nuclear energy, operations involving fissionable materials, and the products of nuclear fission and their effects on the environment. Primary emphasis is on safety in reactor design, construction, and operation; however, the safety aspects of the entire fuel cycle, including fuel fabrication, spent-fuel processing, nuclear waste disposal, handling of radioisotopes, and environmental effects of these operations, are also treated.

  4. Fator de crescimento derivado das plaquetas, retinol e insulina na regulação da maturação nuclear de oócitos bovinos e suas conseqüências no desenvolvimento embrionário Platelet-derived growth factor, retinol and insulin in the regulation of bovine oocyte nuclear maturation and their consequent effect in the embryonic development

    Directory of Open Access Journals (Sweden)

    E.B. Bortolotto

    2001-04-01

    Full Text Available O objetivo deste trabalho foi verificar as ações do fator de crescimento derivado das plaquetas (PDGF; P, da insulina (I, do retinol (R e de suas associações (PI, PIR, IR e PR na maturação nuclear (MN de oócitos bovinos e suas conseqüências no desenvolvimento embrionário (DE. O meio básico para maturação dos oócitos nos diferentes tratamentos foi o TCM-199 modificado acrescido de PVA (controle. No DE, foram utilizados os grupos R, PIR, IR, um controle negativo (PVA e um controle positivo, contendo soro fetal bovino e gonadotrofinas (SFBHOR. Os fatores P, I, R e suas associações não aceleraram a MN em 7h mas sim após 18h (PThe aim of the present study was to determine the effect of platelet-derived growth factor (PDGF; P, insulin (I retinol, (R and their interactions (PI, PIR, IR and PR on oocyte nuclear maturation (NM and, consequent, embryonic development (ED. The basic medium for oocyte maturation in the treatments was the modified TCM-199, supplemented with PVA (control. To study the embryonic development, the oocytes were divided in three treatments, R, PIR e IR, a negative (PVA and a positive control group (containing calf fetal serum and gonadotrophic hormones; FCSHOR. The PDGF, insulin, retinol and their interactions did not change the kinetic of the NM, in seven hours of culture (P=0.4492 but it changed after 18 hours of maturation (P<0.001 except in the treatments R and PR (P<0.001, in which the percentages of metaphase II were, respectively, 4.7% and 8.3%. These results were similar to the control group (0.0%. Considering a significant level of P<0.0001 in comparison to the control group, the higher rates of metaphase II were obtained in the presence of IR (19.0% and PIR (21.3%. The higher rates of MII were observed when the oocytes were matured in the presence of insulin and retinol. In the embryonic development, R (18.3%, PIR (13.9% and IR (10.6% increased the rate of cleavage when compared to PVA group (0.0%; P<0

  5. Nuclear Astrophysics

    Science.gov (United States)

    Drago, Alessandro

    2005-04-01

    The activity of the Italian nuclear physicists community in the field of Nuclear Astrophysics is reported. The researches here described have been performed within the project "Fisica teorica del nucleo e dei sistemi a multi corpi", supported by the Ministero dell'Istruzione, dell'Università e della Ricerca.

  6. Nuclear stress test

    Science.gov (United States)

    ... Persantine stress test; Thallium stress test; Stress test - nuclear; Adenosine stress test; Regadenoson stress test; CAD - nuclear stress; Coronary artery disease - nuclear stress; Angina - nuclear ...

  7. Nuclear questions

    Energy Technology Data Exchange (ETDEWEB)

    Durrani, M. [Physics World (United Kingdom)

    2006-01-01

    The future of nuclear power has returned to centre stage. Freezing weather on both sides of the Atlantic and last month's climate-change talks in Montreal have helped to put energy and the future of nuclear power right back on the political agenda. The issue is particularly pressing for those countries where existing nuclear stations are reaching the end of their lives. In the UK, prime minister Tony Blair has commissioned a review of energy, with a view to deciding later this year whether to build new nuclear power plants. The review comes just four years after the Labour government published a White Paper on energy that said the country should keep the nuclear option open but did not follow this up with any concrete action. In Germany, new chancellor and former physicist Angela Merkel is a fan of nuclear energy and had said she would extend the lifetime of its nuclear plants beyond 2020, when they are due to close. However, that commitment has had to be abandoned, at least for the time being, following negotiations with her left-wing coalition partners. The arguments in favour of nuclear power will be familiar to all physicists - it emits almost no carbon dioxide and can play a vital role in maintaining a diverse energy supply. To over-rely on imported supplies of oil and gas can leave a nation hostage to fortune. The arguments against are equally easy to list - the public is scared of nuclear power, it generates dangerous waste with potentially huge clean-up costs, and it is not necessarily cheap. Nuclear plants could also be a target for terrorist attacks. Given political will, many of these problems can be resolved, or at least tackled. China certainly sees the benefits of nuclear power, as does Finland, which is building a new 1600 MW station - the world's most powerful - that is set to open in 2009. Physicists, of course, are essential to such developments. They play a vital role in ensuring the safety of such plants and developing new types of

  8. Nuclear Physics

    CERN Document Server

    Savage, Martin J

    2016-01-01

    Lattice QCD is making good progress toward calculating the structure and properties of light nuclei and the forces between nucleons. These calculations will ultimately refine the nuclear forces, particularly in the three- and four-nucleon sector and the short-distance interactions of nucleons with electroweak currents, and allow for a reduction of uncertainties in nuclear many-body calculations of nuclei and their reactions. After highlighting their importance, particularly to the Nuclear Physics and High-Energy Physics experimental programs, I discuss the progress that has been made toward achieving these goals and the challenges that remain.

  9. Nuclear reaction

    CERN Multimedia

    Penwarden, C

    2001-01-01

    At the European Research Organization for Nuclear Research, Nobel laureates delve into the mysteries of particle physics. But when they invited artists from across the continent to visit their site in Geneva, they wanted a new kind of experiment.

  10. Nuclear Disarmament.

    Science.gov (United States)

    Johnson, Christopher

    1982-01-01

    Material about nuclear disarmament and the arms race should be included in secondary school curricula. Teachers can present this technical, controversial, and frightening material in a balanced and comprehensible way. Resources for instructional materials are listed. (PP)

  11. Resonancia magnética nuclear en el postoperatorio de discectomía lumbar en pacientes asintomáticos y con síndrome de cirugía lumbar fallida Ressonância nuclear magnética no pós-operatório da discectomia lombar em pacientes assintomáticos e com síndrome de cirurgia lombar falida Nuclear magnetic resonance in postoperative lumbar discectomy in asymptomatic patients and with failed back surgery syndrome

    Directory of Open Access Journals (Sweden)

    Armando Alpizar-Aguirre

    2010-03-01

    evolução satisfatória, assim como naqueles com "Síndrome de Cirurgia Falida", dando ênfase ao justo valor que a ressonância nuclear magnética tem. MÉTODOS: o universo do trabalho esta constituído por dois grupos, Grupo I com cinco pacientes com evolução satisfatória, assintomáticos. O Grupo II possui dez pacientes com resultados considerados não-satisfatórios e/ou "Síndrome Falida Lombar". Analisaram-se os resultados obtidos na imagem da ressonância nuclear magnética, emitindo um diagnóstico com avaliação externa sem conhecimento do estado clínico dos pacientes, e realizou-se uma correlação com o estado clínico de ambos os grupos. RESULTADOS: as manifestações clínicas pré-operatórias tiveram uma distribuição muito similar. Em nenhum dos grupos se reportaram complicações transoperatórias. Em todos os grupos, foi feito o estudo histopatológico e foi informado o disco degenerado ou hialinizado. No Grupo I, não foi encontrada imagem de alguma anomalia apesar de seu estado clínico. Em todos os pacientes foram encontrados dados de fibroses pós-cirúrgica, em quatro casos, disco residual, com compressão radicular nos cinco pacientes. No Grupo II, só foi possível encontrar em oito pacientes, e a ressonância nuclear magnética demonstrou algum achado anormal, os quais foram fibroses pós-cirúrgica, em cinco casos (50%; disco residual, em três casos (30%; e dados de compressão radicular, em seis casos (60%. CONCLUSÃO: não há congruência entre os achados da ressonância nuclear magnética e a clínica em pacientes pós-operatórios da discectomia lombar com evolução satisfatória, até o momento, assintomáticos. A ressonância nuclear magnética não é confiável nestes pacientes.OBJECTIVE: to analyze the postoperative changes in patients undergoing lumbar discectomy, both in patients whose evolution has been satisfactory, as in those with "Failed lumbar Surgery Syndrome", emphasizing the fair value that the nuclear magnetic

  12. Nuclear Data

    Energy Technology Data Exchange (ETDEWEB)

    White, Morgan C. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-01-23

    PowerPoint presentation targeted for educational use. Nuclear data comes from a variety of sources and in many flavors. Understanding where the data you use comes from and what flavor it is can be essential to understand and interpret your results. This talk will discuss the nuclear data pipeline with particular emphasis on providing links to additional resources that can be used to explore the issues you will encounter.

  13. Nuclear Structure

    Science.gov (United States)

    Gargano, Angela

    2003-04-01

    An account of recent studies in the field of theoretical nuclear structure is reported. These studies concern essentially research activities performed under the Italian project "Fisica Teorica del Nucleo e dei Sistemi a Molti Corpi". Special attention is addressed to results obtained during the last two years as regards the development of new many-body techniques as well as the interpretation of new experimental aspects of nuclear structure.

  14. Nuclear astrophysics

    Energy Technology Data Exchange (ETDEWEB)

    Arnould, M. [Institut d' Astronomie et d' Astrophysique, Universite Libre de Bruxelles, Bruxelles (Belgium); Takahashi, K. [Max-Planck-Institut fuer Astrophysik, Garching (Germany)

    1999-03-01

    Nuclear astrophysics is that branch of astrophysics which helps understanding of the Universe, or at least some of its many faces, through the knowledge of the microcosm of the atomic nucleus. It attempts to find as many nuclear physics imprints as possible in the macrocosm, and to decipher what those messages are telling us about the varied constituent objects in the Universe at present and in the past. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress made in the modelling of the structure and evolution of the stars, in the quality and diversity of the astronomical observations, as well as in the experimental and theoretical understanding of the atomic nucleus and of its spontaneous or induced transformations. Developments in other subfields of physics and chemistry have also contributed to that advance. Notwithstanding the accomplishment, many long-standing problems remain to be solved, and the theoretical understanding of a large variety of observational facts needs to be put on safer grounds. In addition, new questions are continuously emerging, and new facts endangering old ideas. This review shows that astrophysics has been, and still is, highly demanding to nuclear physics in both its experimental and theoretical components. On top of the fact that large varieties of nuclei have to be dealt with, these nuclei are immersed in highly unusual environments which may have a significant impact on their static properties, the diversity of their transmutation modes, and on the probabilities of these modes. In order to have a chance of solving some of the problems nuclear astrophysics is facing, the astrophysicists and nuclear physicists are obviously bound to put their competence in common, and have sometimes to benefit from the help of other fields of physics, like particle physics, plasma physics or solid-state physics. Given the highly varied and complex aspects, we pick here some specific nuclear

  15. Nuclear astrophysics

    Science.gov (United States)

    Arnould, M.; Takahashi, K.

    1999-03-01

    Nuclear astrophysics is that branch of astrophysics which helps understanding of the Universe, or at least some of its many faces, through the knowledge of the microcosm of the atomic nucleus. It attempts to find as many nuclear physics imprints as possible in the macrocosm, and to decipher what those messages are telling us about the varied constituent objects in the Universe at present and in the past. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress made in the modelling of the structure and evolution of the stars, in the quality and diversity of the astronomical observations, as well as in the experimental and theoretical understanding of the atomic nucleus and of its spontaneous or induced transformations. Developments in other subfields of physics and chemistry have also contributed to that advance. Notwithstanding the accomplishment, many long-standing problems remain to be solved, and the theoretical understanding of a large variety of observational facts needs to be put on safer grounds. In addition, new questions are continuously emerging, and new facts endangering old ideas. This review shows that astrophysics has been, and still is, highly demanding to nuclear physics in both its experimental and theoretical components. On top of the fact that large varieties of nuclei have to be dealt with, these nuclei are immersed in highly unusual environments which may have a significant impact on their static properties, the diversity of their transmutation modes, and on the probabilities of these modes. In order to have a chance of solving some of the problems nuclear astrophysics is facing, the astrophysicists and nuclear physicists are obviously bound to put their competence in common, and have sometimes to benefit from the help of other fields of physics, like particle physics, plasma physics or solid-state physics. Given the highly varied and complex aspects, we pick here some specific nuclear

  16. Nuclear Nonproliferation

    Energy Technology Data Exchange (ETDEWEB)

    Atkins-Duffin, C E

    2008-12-10

    With an explosion equivalent of about 20kT of TNT, the Trinity test was the first demonstration of a nuclear weapon. Conducted on July 16, 1945 in Alamogordo, NM this site is now a Registered National Historic Landmark. The concept and applicability of nuclear power was demonstrated on December 20, 1951 with the Experimental Breeder Reactor Number One (EBR-1) lit four light bulbs. This reactor is now a Registered National Historic Landmark, located near Arco, ID. From that moment forward it had been clearly demonstrated that nuclear energy has both peaceful and military applications and that the civilian and military fuel cycles can overlap. For the more than fifty years since the Atoms for Peace program, a key objective of nuclear policy has been to enable the wider peaceful use of nuclear energy while preventing the spread of nuclear weapons. Volumes have been written on the impact of these two actions on the world by advocates and critics; pundits and practioners; politicians and technologists. The nations of the world have woven together a delicate balance of treaties, agreements, frameworks and handshakes that are representative of the timeframe in which they were constructed and how they have evolved in time. Collectively these vehicles attempt to keep political will, nuclear materials and technology in check. This paper captures only the briefest abstract of the more significant aspects on the Nonproliferation Regime. Of particular relevance to this discussion is the special nonproliferation sensitivity associated with the uranium isotope separation and spent fuel reprocessing aspects of the nuclear fuel cycle.

  17. A model for environmental scanning oriented for the strategic planning of the Brazilian Nuclear Energy Commission (CNEN); Um modelo de monitoramento ambiental (environmental scanning) orientado para o planejamento estrategico da CNEN

    Energy Technology Data Exchange (ETDEWEB)

    Braga, Fabiane dos Reis

    1997-07-01

    Presently, all the organizations involved with nuclear activities must be one step ahead of what happens in the specific activity areas in order to avoid surprises, to guarantee their activity continuity and the objective extents, and taking into account the external environment influence exercised by the organization on their activities. So, it is necessary a continuous follow up of their transformations. This paper aims to structure a model of the environmental monitoring system oriented to the strategic planning of the Brazilian Nuclear Energy Commission, as function of that new informational needs viewing the fulfilment of that observed gap. (author)

  18. Prolonged interval between fusion and activation impairs embryonic development by inducing chromosome scattering and nuclear aneuploidy in pig somatic cell nuclear transfer.

    Science.gov (United States)

    You, Jinyoung; Song, Kilyoung; Lee, Eunsong

    2010-01-01

    The aim of the present study was to examine the effect of various intervals between electrofusion and activation (FA interval) on the nuclear remodelling and development of somatic cell nuclear transfer (SCNT) embryos in pigs. Reconstructed oocytes were activated at 0 (simultaneous fusion and activation; SFA), 1, 2 and 3 h (delayed activation) after electrofusion; these groups were designated as DA1, DA2 and DA3, respectively. When oocyte nuclear status was examined at 0.5, 1, 2 and 3 h after electrofusion, the incidence of chromosome scattering was increased (P or=3) pseudopronuclei (PPN) (0.0% of SFA; 5.3% of DA1; 21.7% of DA2; and 33.5% of DA3). The development of SCNT embryos to the blastocyst stage was decreased (P nuclear aneuploidy.

  19. Crocodylian nuclear factor kappa B.

    Science.gov (United States)

    Merchant, Mark; Morkotinis, Vasileios; Hale, Amber; White, Mary; Moran, Chris

    2017-11-01

    We deduced the amino acid (aa) sequence of the nuclear factor kappa B (NFκB) protein from genomic data for the American alligator (Alligator mississippiensis), the estuarine crocodile (Crocodylus porosus), and the Indian gharial (Gavialis gangeticus). A 105kDa protein, NFκB1 exhibits complex post-translational processing, multiple mechanisms of activation, and acts as precursor for a p50, a Rel homology transcription factor which influences the expression of key genes for developmental processes, apoptosis, and immune function. The aa sequences of the crocodylian proteins share very high identity with each other (97.2±0.7%), birds (81.0±1.1%, n=6), mammals (75.3±1.6%, n=4), reptiles (80.3±5.1%, n=2), and less identity with fish (55.5±5.5%, n=4) and one amphibian (66.1±0.8%). The crocodylian protein has a well-conserved Rel homology domain, a nuclear localization signal, and a glycine-rich region which facilitates proteasome-mediated generation of p50. The Rel homology domain contains sequences responsible for dimerization, DNA-binding, and nuclear translocation. In addition, seven ankyrin repeats were located, which putatively allow for inhibition of transcriptional regulation by mediating interaction with Inhibitor kappa B. Other features include a death domain, and conserved serine residues, near the C-terminal end, which act as potential phosphorylation sites for activation of the proteolytic generation of p50. Western blot analysis showed both the 105kDa precursor and the 50kDa mature NFκB were expressed in the alligator liver. Nuclear factor κB exhibited diffuse cytoplasmic distribution in alligator hepatocytes, and almost no cytoplasmic localization in infected animals. In addition, nuclear NFκB exhibited specific binding to the consensus NFκB promoter element. Published by Elsevier Inc.

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

    OpenAIRE

    Menéndez, J. A.

    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?

  1. ¿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?

  2. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small ... of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical ...

  3. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging ... the limitations of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch ...

  4. General Nuclear Medicine

    Science.gov (United States)

    ... Physician Resources Professions Site Index A-Z General Nuclear Medicine Nuclear medicine imaging uses small amounts of ... limitations of General Nuclear Medicine? What is General Nuclear Medicine? Nuclear medicine is a branch of medical ...

  5. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small ... of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical ...

  6. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses ... limitations of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of ...

  7. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small amounts ... Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical imaging ...

  8. Children's (Pediatric) Nuclear Medicine

    Science.gov (United States)

    ... Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine imaging uses small amounts ... Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a branch of medical imaging ...

  9. Analysis of the emergency plan of Angra dos Reis Nuclear Power Plants: a critical view related to accessibility and mobility of people with special needs; Analise do plano de emergencia da Central Nuclear de Angra dos Reis: uma visao critica com relacao a acessibilidade e mobilidade de pessoas com necessidades especiais

    Energy Technology Data Exchange (ETDEWEB)

    Correa, Luanda C.A., E-mail: luanda.correa@yahoo.com.br [Universidade Candido Mendes, Rio de Janeiro, RJ (Brazil); Correa, Samanda C.A., E-mail: scorrea@cnen.gov.br [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil); Santos, Geissa; Souza, Edmilson M., E-mail: edmilsonsouza@uezo.rj.gov.br, E-mail: geissasantosnaval@gmail.com [Universidade Estadual da Zona Oeste (UEZO), Rio de Janeiro, RJ (Brazil)

    2014-07-01

    This work intends to make a critical analysis of the emergency plan of the Angra dos Reis Nuclear Power Plants related to appropriate transportation, accommodation and infrastructure for people with special needs.

  10. Implementation of a computational system at the Center for Nuclear Technology Development, for systematization the application of the FMEA - Failure Mode and Effects Analysis, for identification of dangerous and developed risks evaluation; Implementacao de um sistema computacional no Centro de Desenvolvimento da Tecnologia Nuclear para sistemarizar a aplicacao da tecnica FMEA - Failure Mode and Effects Analysis - na identificacao de perigos e avaliacao de riscos desenvolvida

    Energy Technology Data Exchange (ETDEWEB)

    Correa, Danyel Pontelo; Vasconcelos, Vanderley de, E-mail: dpc@cdtn.b, E-mail: vasconv@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2009-07-01

    The regulatory bodies request risks evaluations for nuclear and radioactive licensing purposes. In Brazil those evaluations are contained by the safety analysis reports requested by the Brazilian Nuclear Energy Commission (CNEN), and risk analysis studies requested by the environment organisms. A risk evaluation includes the identification of the risks and the accident sequence which can occur, and the estimation of the frequency and his undesirable effects on the industrial installations, the public, and the environment. The identification and the risk analysis are particularly important for the implementation of a health, environment and safety integrated management according to the regulation instruments ISO 14001, BS 8800 and OHSAS 18001. The utilization of the risk identification techniques and the risk analysis is performed at the non nuclear industry, in a non standard form by the various sectors of an enterprise, diminishing the effectiveness of the recommended actions based on risk indexes. However, for the nuclear licensing, the CNEN request through their regulatory instruments and standard formats, that the risks, the failure mechanisms and detection be identified, which can allow the preventive and mitigate actions. This paper proposes the utilization of the FMEA (Failure Mode and Effects Analysis) technique in the licensing process. It was implemented a software through the Excel program, using the Visual Basic for Applications program which allows the automation and the standardization of FMEA studies as well

  11. Nuclear scales

    Energy Technology Data Exchange (ETDEWEB)

    Friar, J.L.

    1998-12-01

    Nuclear scales are discussed from the nuclear physics viewpoint. The conventional nuclear potential is characterized as a black box that interpolates nucleon-nucleon (NN) data, while being constrained by the best possible theoretical input. The latter consists of the longer-range parts of the NN force (e.g., OPEP, TPEP, the {pi}-{gamma} force), which can be calculated using chiral perturbation theory and gauged using modern phase-shift analyses. The shorter-range parts of the force are effectively parameterized by moments of the interaction that are independent of the details of the force model, in analogy to chiral perturbation theory. Results of GFMC calculations in light nuclei are interpreted in terms of fundamental scales, which are in good agreement with expectations from chiral effective field theories. Problems with spin-orbit-type observables are noted.

  12. Nuclear Scales

    CERN Document Server

    Friar, J L

    1998-01-01

    Nuclear scales are discussed from the nuclear physics viewpoint. The conventional nuclear potential is characterized as a black box that interpolates nucleon-nucleon (NN) data, while being constrained by the best possible theoretical input. The latter consists of the longer-range parts of the NN force (e.g., OPEP, TPEP, the $\\pi$-$\\gamma$ force), which can be calculated using chiral perturbation theory and gauged using modern phase-shift analyses. The shorter-range parts of the force are effectively parameterized by moments of the interaction that are independent of the details of the force model, in analogy to chiral perturbation theory. Results of GFMC calculations in light nuclei are interpreted in terms of fundamental scales, which are in good agreement with expectations from chiral effective field theories. Problems with spin-orbit-type observables are noted.

  13. Nuclear astrophysics

    CERN Document Server

    Arnould, M

    1999-01-01

    Nuclear astrophysics is that branch of astrophysics which helps understanding some of the many facets of the Universe through the knowledge of the microcosm of the atomic nucleus. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress in the modelling of the structure and evolution of the stars, in the quality and diversity of the astronomical observations, as well as in the experimental and theoretical understanding of the atomic nucleus and of its spontaneous or induced transformations. Developments in other sub-fields of physics and chemistry have also contributed to that advance. Many long-standing problems remain to be solved, however, and the theoretical understanding of a large variety of observational facts needs to be put on safer grounds. In addition, new questions are continuously emerging, and new facts endanger old ideas. This review shows that astrophysics has been, and still is, highly demanding to nuclear physics in both its experime...

  14. Nuclear Models

    Science.gov (United States)

    Fossión, Rubén

    2010-09-01

    The atomic nucleus is a typical example of a many-body problem. On the one hand, the number of nucleons (protons and neutrons) that constitute the nucleus is too large to allow for exact calculations. On the other hand, the number of constituent particles is too small for the individual nuclear excitation states to be explained by statistical methods. Another problem, particular for the atomic nucleus, is that the nucleon-nucleon (n-n) interaction is not one of the fundamental forces of Nature, and is hard to put in a single closed equation. The nucleon-nucleon interaction also behaves differently between two free nucleons (bare interaction) and between two nucleons in the nuclear medium (dressed interaction). Because of the above reasons, specific nuclear many-body models have been devised of which each one sheds light on some selected aspects of nuclear structure. Only combining the viewpoints of different models, a global insight of the atomic nucleus can be gained. In this chapter, we revise the the Nuclear Shell Model as an example of the microscopic approach, and the Collective Model as an example of the geometric approach. Finally, we study the statistical properties of nuclear spectra, basing on symmetry principles, to find out whether there is quantum chaos in the atomic nucleus. All three major approaches have been rewarded with the Nobel Prize of Physics. In the text, we will stress how each approach introduces its own series of approximations to reduce the prohibitingly large number of degrees of freedom of the full many-body problem to a smaller manageable number of effective degrees of freedom.

  15. Nuclear Assessment

    Institute of Scientific and Technical Information of China (English)

    CHARLES K.EBINGER; JOHN P.BANKS

    2010-01-01

    @@ In President Barack Obama's State of the Union address in January 2009,he called for the building of "a new generation of safe,clean nuclear power plants" This was followed by his highprofile speech in Prague in April 2009,in which he noted the need "to harness the power of nuclear energy on behalf of our efforts to combat climate change."In December 2009 in Copenhagen,he pledged the United States will reduce carbon dioxide (CO2) emissions 17 percent from 2005 levels by 2020.

  16. Nuclear winter or nuclear fall?

    Science.gov (United States)

    Berger, André

    Climate is universal. If a major modern nuclear war (i.e., with a large number of small-yield weapons) were to happen, it is not even necessary to have a specific part of the world directly involved for there to be cause to worry about the consequences for its inhabitants and their future. Indeed, smoke from fires ignited by the nuclear explosions would be transported by winds all over the world, causing dark and cold. According to the first study, by Turco et al. [1983], air surface temperature over continental areas of the northern mid-latitudes (assumed to be the nuclear war theatre) would fall to winter levels even in summer (hence the term “nuclear winter”) and induce drastic climatic conditions for several months at least. The devastating effects of a nuclear war would thus last much longer than was assumed initially. Discussing to what extent these estimations of long-term impacts on climate are reliable is the purpose of this article.

  17. Nuclear Assessment

    Institute of Scientific and Technical Information of China (English)

    CHARLES; K.; EBINGER; JOHN; P.; BANKS

    2010-01-01

    The United States needs a comprehensive policy and market-based solutions to address the challenges and demands of energy provision in President Barack Obama’s State of the Union address in January 2009, he called for the building of "a new generation of safe, clean nuclear power plants." This was followed by his high- profile speech in Prague in April 2009,

  18. Nuclear Science.

    Science.gov (United States)

    Pennsylvania State Dept. of Education, Harrisburg. Bureau of Curriculum Services.

    This document is a report on a course in nuclear science for the high school curriculum. The course is designed to provide a basic but comprehensive understanding of the atom in the light of modern knowledge, and to show how people attempt to harness the tremendous energy liberated through fission and fusion reactions. The course crosses what are…

  19. Determination of the presence of molybdenum-99 in the technetium-99m solutions used at the nuclear medicine services of Recife, Pernambuco, Brazil; Determinacao da presenca de molibdenio-99 nas solucoes de tecnecio-99M utilizadas nos servicos de medicina nuclear do Recife, PE

    Energy Technology Data Exchange (ETDEWEB)

    Sena, Thiago G. de; Souza, Fernanda R. de L.; Lopes Filho, Ferdinand de J.; Vieira, Jose W., E-mail: thiagogsena@gmail.co, E-mail: fernandalima1988@gmail.co, E-mail: ferdinand.lopes@oi.com.b, E-mail: jwvieira@br.inter.ne [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco, Recife, PE (Brazil); Lima, Fernando R. de A., E-mail: falima@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2009-07-01

    The main objective of this work is to calculate the percentage of {sup 99}Mo in the eluates of the {sup 99}mTc used at the nuclear medicine services localized at the Recife city, Pernambuco, Brazil. At the present moment three nuclear medicine services were evaluated verifying the {sup 99}Mo in the eluates of {sup 99}mTc, and in two services, the contamination were superior to the limits stipulated by the international organism adopted as reference in this work. The work follows in other nuclear medicine institutions evaluating and orienting the professionals on these quality control not only for the optimization of the patient dose, but also for the improvement of the image to be used for the diagnostic

  20. Analysis of normative requirements for the development and implementation of a quality management system in Brazilian nuclear installations and activities; Analise de requisitos normativos para o desenvolvimento e a implementacao de um sistema de gestao da qualidade em instalacoes e atividades nucleares brasileiras

    Energy Technology Data Exchange (ETDEWEB)

    Kibrit, Eduardo

    2008-07-01

    The present work identifies, characterizes and analyses the normative requirements for the development and implementation of quality management systems in Brazilian nuclear installations and activities. The requirements established in standards IAEA GS-R-3, IAEA GS-G-3.1, IAEA DS 349, NBR ISO 9001:2000 e CNEN-NN-1.16 are critically analyzed. A correlation matrix of the applicable standards is presented and the related topics among them are identified. The standards IAEA GS-R-3, IAEA GS-G-3.1 and IAEA DS 349 define general requirements for establishing, implementing, assessing and continually improving an integrated management system in nuclear installations and activities, in IAEA member countries. The standard NBR ISO 9001:2000 establishes general requirements for the implementation of a quality management system in all kinds of organizations. The standard CNEN NN-1.16 establishes the regulating requirements for the quality assurance systems and programs of nuclear installations, for licensing and authorization for operation of these installations in Brazil. The standard IAEA GS-R-3 that replaces the code IAEA 50-C-Q introduces the concept of 'Integrated Management System' for the nuclear area, in preference to the concepts of 'Quality Assurance' and 'Quality Management'. This new approach is aligned with the current tendency incorporating requirements of quality, safety, health, environment, security, economics and other in a unique management system. Examples of quality management systems implemented by Brazilian nuclear organizations and by nuclear organizations outside Brazil are analyzed and considered in the discussion of results. (author)

  1. Assimetria cerebral e lateralização da linguagem: déficits nucleares na esquizofrenia como indicadores da predisposição genética Asimetría cerebral y lateralización del lenguaje: déficits nucleares en la esquizofrenia como indicadores de predisposición genética Cerebral asymmetry and the lateralization of language: core deficits in schizophrenia as pointers to the genetic predisposition

    OpenAIRE

    Crow, Timothy J.

    2004-01-01

    OBJETIVO: Assimetria cerebral (o torque do frontal direito em relação ao occipital esquerdo) é a característica definidora do cérebro humano e, conforme proposto por Broca, o correlato neural putativo da linguagem. Se, conforme sugerido, a esquizofrenia é o preço que Homo sapiens precisa pagar pela linguagem, o torque, juntamente com seus correlatos funcionais, é de fundamental importância. São revisadas recentes evidências obtidas a partir de estudos anatômicos, funcionais e genéticos. ACHAD...

  2. Nuclear Physics

    Science.gov (United States)

    Contents: V Dinucleons, published in The Physical Review , v93 n4 p908-909, 15 Feb 1954; Concentration of a Cyclotron Beam by Strong Focusing Lenses...published in The Review of Scientific Instruments, v25 n4 p365-367, Apr 1954; and Photon Splitting in a Nuclear Electrostatic Field, published in The Physical Review , v94 n2 p367-368, 15 Apr 1954.

  3. Nuclear Waffles

    CERN Document Server

    Schneider, A S; Briggs, C M; Caplan, M E; Horowitz, C J

    2014-01-01

    The dense neutron-rich matter found in supernovae and neutron stars is expected to form complex nonuniform phases referred to as nuclear pasta. The pasta shapes depend on density, temperature and proton fraction and determine many transport properties in supernovae and neutron star crusts. We use two recently developed hybrid CPU/GPU codes to perform large scale molecular dynamics (MD) simulations with $51200$ and $409600$ nucleons of nuclear pasta. From the output of the MD simulations we characterize the topology and compute two observables, the radial distribution function $g(r)$ and the structure factor $S(q)$, for systems with proton fractions $Y_p=0.10, 0.20, 0.30$ and $0.40$ at about one third of nuclear saturation density and temperatures near $1.0$ MeV. We observe that the two lowest proton fraction systems simulated, $Y_p=0.10$ and $0.20$, equilibrate quickly and form liquid-like structures. Meanwhile, the two higher proton fraction systems, $Y_p=0.30$ and $0.40$, take a longer time to equilibrate a...

  4. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... are the limitations of Children's Nuclear Medicine? What is Children's (Pediatric) Nuclear Medicine? Nuclear medicine is a ... of your child's body. top of page How is the procedure performed? Nuclear medicine imaging is usually ...

  5. Apoptose e sua importancia no curso da infecção pelo Trypanosoma cruzi

    OpenAIRE

    2003-01-01

    Na presente revisao procurou-se focalizar a participa9a'o da apoptose nos mecanismos patogSnicos e na patologia da doenca de Chagas. A apoptose se constitui em importante capitulo da Patologia Geral e pode ser definida como uma "morte celular programada", a qual ocorre pela clivagem do DNA nuclear, determinada por fatores gen&icos ou externos (toxicos, imunologicos e infecciosos). Os aspectos gerais e basicos da apoptose foram revistos com o objetivo de propiciar um melhor ente...

  6. Nuclear photonics

    Science.gov (United States)

    Habs, D.; Günther, M. M.; Jentschel, M.; Thirolf, P. G.

    2012-07-01

    With the planned new γ-beam facilities like MEGa-ray at LLNL (USA) or ELI-NP at Bucharest (Romania) with 1013 γ/s and a band width of ΔEγ/Eγ≈10-3, a new era of γ beams with energies up to 20MeV comes into operation, compared to the present world-leading HIγS facility at Duke University (USA) with 108 γ/s and ΔEγ/Eγ≈3ṡ10-2. In the long run even a seeded quantum FEL for γ beams may become possible, with much higher brilliance and spectral flux. At the same time new exciting possibilities open up for focused γ beams. Here we describe a new experiment at the γ beam of the ILL reactor (Grenoble, France), where we observed for the first time that the index of refraction for γ beams is determined by virtual pair creation. Using a combination of refractive and reflective optics, efficient monochromators for γ beams are being developed. Thus, we have to optimize the total system: the γ-beam facility, the γ-beam optics and γ detectors. We can trade γ intensity for band width, going down to ΔEγ/Eγ≈10-6 and address individual nuclear levels. The term "nuclear photonics" stresses the importance of nuclear applications. We can address with γ-beams individual nuclear isotopes and not just elements like with X-ray beams. Compared to X rays, γ beams can penetrate much deeper into big samples like radioactive waste barrels, motors or batteries. We can perform tomography and microscopy studies by focusing down to μm resolution using Nuclear Resonance Fluorescence (NRF) for detection with eV resolution and high spatial resolution at the same time. We discuss the dominating M1 and E1 excitations like the scissors mode, two-phonon quadrupole octupole excitations, pygmy dipole excitations or giant dipole excitations under the new facet of applications. We find many new applications in biomedicine, green energy, radioactive waste management or homeland security. Also more brilliant secondary beams of neutrons and positrons can be produced.

  7. Nuclear tele medicine; Telemedicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Vargas, L.; Hernandez, F.; Fernandez, R. [Departamento de Medicina Nuclear, Imagenologia Diagnostica, Xalapa, Veracruz (Mexico)

    2005-07-01

    The great majority of the digital images of nuclear medicine are susceptible of being sent through internet. This has allowed that the work in diagnosis cabinets by image it can benefit of this modern technology. We have presented in previous congresses works related with tele medicine, however, due to the speed in the evolution of the computer programs and the internet, becomes necessary to make a current position in this modality of work. (Author)

  8. Validation of dose-response curve of CRCN-NE - Regional Center for Nuclear Sciences from Northeast Brazil for {sup 60}Co: preliminary results; Validacao da curva dose-resposta do CRCN-NE para {sup 60}Co: resultados preliminares

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca, Julyanne C.G.; Mendes, Mariana E.; Hwang, Suy F.; Lima, Fabiana F. [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Santos, Neide, E-mail: july_cgm@yahoo.com.br [Universidade Federal de Pernambuco (CCB/UFPE), Recife, PE (Brazil). Departamento de Genetica

    2014-07-01

    The cytogenetic study has the chromosomal alterations as biomarkers in absorbed dose estimation by the body of individuals involved in exposure to ionizing radiation by interpreting a dose response calibration curve. Since the development of the technique to the analysis of data, you can see protocol characteristics, leading the International Atomic Energy Agency indicate that any laboratory with intention to carry out biological dosimetry establish their own calibration curves. The Biological Dosimetry Laboratory of the Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN), Brazil, recently established the calibration curve related to gamma radiation ({sup 60}Co). Thus, this work aimed to start the validation of this calibration curve from samples of three different blood donors which were irradiated with an absorbed known single dose of 1 Gy. Samples were exposed to {sup 60}Co source (Glaucoma 220) located in the Department of Nuclear Energy (DEN/UFPE). After fixation with methanol and acetic acid and 5% Giemsa staining, the frequency of chromosomal alterations (dicentric chromosomes, acentric rings and fragments) were established from reading of 500 metaphases per sample and doses were estimated using Dose Estimate program. The results showed that, using the dose-response curve calibration for dicentrics, the dose absorbed estimated for the three individuals ranged from 0.891 - 1,089Gy, taking into account the range of confidence of 95%. By using the dose-response curve for dicentrics added to rings and for the same interval of confidence the doses ranged from 0,849 - 1,081Gy. Thus, the estimative encompassed known absorbed dose the three individuals in confidence interval of 95%. These preliminary results seems to demonstrate that dicentric dose-response curves and dicentrics plus rings established by CRCN-NE / CNEN are valid for dose estimation in exposed individuals. This validation will continue with samples from different individuals at different doses.

  9. The nuclear arsenals and nuclear disarmament.

    Science.gov (United States)

    Barnaby, F

    1998-01-01

    Current world stockpiles of nuclear weapons and the status of treaties for nuclear disarmament and the ultimate elimination of nuclear weapons are summarised. The need for including stockpiles of civil plutonium in a programme for ending production and disposing of fissile materials is emphasized, and the ultimate difficulty of disposing of the last few nuclear weapons discussed.

  10. Nuclear energy.

    Science.gov (United States)

    Grandin, Karl; Jagers, Peter; Kullander, Sven

    2010-01-01

    Nuclear energy can play a role in carbon free production of electrical energy, thus making it interesting for tomorrow's energy mix. However, several issues have to be addressed. In fission technology, the design of so-called fourth generation reactors show great promise, in particular in addressing materials efficiency and safety issues. If successfully developed, such reactors may have an important and sustainable part in future energy production. Working fusion reactors may be even more materials efficient and environmental friendly, but also need more development and research. The roadmap for development of fourth generation fission and fusion reactors, therefore, asks for attention and research in these fields must be strengthened.

  11. Guidelines for implementation of an environmental management system in the nuclear fuel cycle: a case study of USEXA-CEA; Diretrizes para implantacao de um sistema de gestao ambiental no ciclo do combustivel nuclear: estudo de caso da USEXA-CEA

    Energy Technology Data Exchange (ETDEWEB)

    Mattiolo, Sandra Regina

    2012-07-01

    The environmental management standards are intended to provide to the organizations the elements needed for the implementation of an Environmental Management System (EMS) that can be effectively integrated to another management requirements and assist them to achieve their environmental and economic goals. The Uranium Hexafluoride Production Unit - USEXA, located at the Navy Technological Center in Sao Paulo, will be the first Brazilian industrial plant responsible for the conversion stage in the nuclear fuel cycle (production of uranium hexafluoride - UF6), allowing added-value to the uranium ore. The EMS proposed to USEXA in this project allows to regulate its interfaces with the environment, since the Standards of CNEN - National Commission of Nuclear Energy and of the IAEA - International Atomic Energy Agency for Nuclear Installations, aim, mostly, to attend the security criteria for the population and the environment, concerning ionizing radiation. This model of EMS fills the gaps in standards of IAEA and CNEN, since it takes into account the environmental impacts from the use of chemicals in the manufacturing process of UF6, and general aspects of sustainability. It can be considered an original contribution within the complex activities that includes the uranium processing in the nuclear fuel cycle. This research proposes, as result, the use of a filter of significance to evaluate the environmental impacts depending on the installation location. It is also presented the Management System Manual for USEXA and models for training in personnel management are suggested, such as coaching and neuro linguistic programing, which can be applied to any Management System. The training can be considered a preventive action as they considerably decreased incidents related to equipment maintenance and thus the occurrence of environmental impacts. (author)

  12. Percepção do coping e da qualidade de vida em diferentes formas de família (famílias nucleares intactas ; famílias pós-divórcio e famílias reconstituídas

    OpenAIRE

    Rica, Susana Manuela Lopes

    2010-01-01

    Dissertação de mestrado em Psicologia Clínica da Saúde, apresentada à Faculdade de Psicologia e Ciências da Educação da Universidade de Coimbra, sob a orientação da Prof. Doutora Ana Paula Relvas.

  13. Applications of nuclear physics

    Science.gov (United States)

    Hayes, A. C.

    2017-02-01

    Today the applications of nuclear physics span a very broad range of topics and fields. This review discusses a number of aspects of these applications, including selected topics and concepts in nuclear reactor physics, nuclear fusion, nuclear non-proliferation, nuclear-geophysics, and nuclear medicine. The review begins with a historic summary of the early years in applied nuclear physics, with an emphasis on the huge developments that took place around the time of World War II, and that underlie the physics involved in designs of nuclear explosions, controlled nuclear energy, and nuclear fusion. The review then moves to focus on modern applications of these concepts, including the basic concepts and diagnostics developed for the forensics of nuclear explosions, the nuclear diagnostics at the National Ignition Facility, nuclear reactor safeguards, and the detection of nuclear material production and trafficking. The review also summarizes recent developments in nuclear geophysics and nuclear medicine. The nuclear geophysics areas discussed include geo-chronology, nuclear logging for industry, the Oklo reactor, and geo-neutrinos. The section on nuclear medicine summarizes the critical advances in nuclear imaging, including PET and SPECT imaging, targeted radionuclide therapy, and the nuclear physics of medical isotope production. Each subfield discussed requires a review article unto itself, which is not the intention of the current review; rather, the current review is intended for readers who wish to get a broad understanding of applied nuclear physics.

  14. Nuclear Photonics

    CERN Document Server

    Habs, D; Jentschel, M; Thirolf, P G

    2012-01-01

    With new gamma-beam facilities like MEGa-ray at LLNL (USA) or ELI-NP at Bucharest with 10^13 g/s and a bandwidth of Delta E_g/E_g ~10^-3, a new era of g-beams with energies <=20 MeV comes into operation, compared to the present world-leading HIGS facility (Duke Univ., USA) with 10^8 g/s and Delta E_g/E_g~0.03. Even a seeded quantum FEL for g-beams may become possible, with much higher brilliance and spectral flux. At the same time new exciting possibilities open up for focused g-beams. We describe a new experiment at the g-beam of the ILL reactor (Grenoble), where we observed for the first time that the index of refraction for g-beams is determined by virtual pair creation. Using a combination of refractive and reflective optics, efficient monochromators for g-beams are being developed. Thus we have to optimize the system of the g-beam facility, the g-beam optics and g-detectors. We can trade g-intensity for band width, going down to Delta E_g/E_g ~ 10^-6 and address individual nuclear levels. 'Nuclear pho...

  15. Diagnóstico pré-natal de gêmeos unidos com uso da ressonância nuclear magnética: relato de dois casos Prenatal diagnosis of conjoined twins by magnetic resonance imaging: report of two cases

    Directory of Open Access Journals (Sweden)

    Alex Sandro Rolland de Souza

    2006-07-01

    Full Text Available A gemelaridade imperfeita é entidade bastante rara e de grande interesse para fetólogos e obstetras em geral. Sua incidência estimada varia de 1:50.000 a 1:200.000 nascimentos. Seu diagnóstico precoce se faz necessário, tendo em vista sua importância para o prognóstico da gestação, correta determinação da via de parto e o planejamento pós-natal. Os dois casos relatados são de gêmeos unidos diagnosticados no pré-natal através da ultra-sonografia e ressonância nuclear magnética, para estudo do compartilhamento dos órgãos e melhor definição das relações anatômicas. O primeiro par gemelar foi cefalópago, ou seja, unidos pela cabeça, tórax e abdome, com duas pelves e oito membros. O segundo foi toracópago, ou seja, unidos pelo tórax e abdome superior. A ressonância magnética pouco contribuiu para o diagnóstico de gêmeos unidos. Entretanto, se mostrou de grande auxílio na descrição dos órgãos compartilhados entre os fetos, contribuindo na definição do prognóstico fetal.Conjoined twins have a rare prevalence and special curiosity among physicians and the general population. The reported frequency varies from 1:50,000 to 1:200,000 pregnancies. Its early diagnosis becomes very important when we think about pregnancy management, method of delivery and neonatal care. We describe two cases of conjoined twins diagnosed by ultrasound and magnetic resonance during prenatal care with the aim to better studying the fetus anatomy. The first conjoined twins were cephalopagus sharing head, thorax and abdominal wall and with two pelvis and four arms and four legs. The second were thoracopagus, united by thorax and part of abdomen. Magnetic resonance imaging contribution was not important to diagnose conjoined twins. However, it was useful to describe the shared organs, contributing to define fetal outcome.

  16. Dictionary of nuclear engineering

    Energy Technology Data Exchange (ETDEWEB)

    Sube, R.

    1985-01-01

    Ralf Sube, an experienced compiler of three wellknown four-language reference works has now prepared this glossary of nuclear engineering terms in English, German, French and Russian. Based on the proven lexicography of the Technik-Worterbuch series, it comprises about 30,000 terms in each language covering the following: Nuclear and Atomic Physics; Nuclear Radiation and Isotopes; Nuclear Materials; Nuclear Facilties; Nuclear Power Industry; Nuclear Weapons.

  17. Nuclear "waffles"

    Science.gov (United States)

    Schneider, A. S.; Berry, D. K.; Briggs, C. M.; Caplan, M. E.; Horowitz, C. J.

    2014-11-01

    Background: The dense neutron-rich matter found in supernovae and inside neutron stars is expected to form complex nonuniform phases, often referred to as nuclear pasta. The pasta shapes depend on density, temperature and proton fraction and determine many transport properties in supernovae and neutron star crusts. Purpose: To characterize the topology and compute two observables, the radial distribution function (RDF) g (r ) and the structure factor S (q ) , for systems with proton fractions Yp=0.10 ,0.20 ,0.30 , and 0.40 at about one-third of nuclear saturation density, n =0.050 fm-3 , and temperatures near k T =1 MeV . Methods: We use two recently developed hybrid CPU/GPU codes to perform large scale molecular dynamics (MD) simulations with 51 200 and 409 600 nucleons. From the output of the MD simulations we obtain the two desired observables. Results: We compute and discuss the differences in topology and observables for each simulation. We observe that the two lowest proton fraction systems simulated, Yp=0.10 and 0.20 , equilibrate quickly and form liquidlike structures. Meanwhile, the two higher proton fraction systems, Yp=0.30 and 0.40 , take a longer time to equilibrate and organize themselves in solidlike periodic structures. Furthermore, the Yp=0.40 system is made up of slabs, lasagna phase, interconnected by defects while the Yp=0.30 systems consist of a stack of perforated plates, the nuclear waffle phase. Conclusions: The periodic configurations observed in our MD simulations for proton fractions Yp≥0.30 have important consequences for the structure factors S (q ) of protons and neutrons, which relate to many transport properties of supernovae and neutron star crust. A detailed study of the waffle phase and how its structure depends on temperature, size of the simulation, and the screening length showed that finite-size effects appear to be under control and, also, that the plates in the waffle phase merge at temperatures slightly above 1.0 MeV and

  18. Assimetria cerebral e lateralização da linguagem: déficits nucleares na esquizofrenia como indicadores da predisposição genética Asimetría cerebral y lateralización del lenguaje: déficits nucleares en la esquizofrenia como indicadores de predisposición genética Cerebral asymmetry and the lateralization of language: core deficits in schizophrenia as pointers to the genetic predisposition

    Directory of Open Access Journals (Sweden)

    Timothy J. Crow

    2004-08-01

    Full Text Available OBJETIVO: Assimetria cerebral (o torque do frontal direito em relação ao occipital esquerdo é a característica definidora do cérebro humano e, conforme proposto por Broca, o correlato neural putativo da linguagem. Se, conforme sugerido, a esquizofrenia é o preço que Homo sapiens precisa pagar pela linguagem, o torque, juntamente com seus correlatos funcionais, é de fundamental importância. São revisadas recentes evidências obtidas a partir de estudos anatômicos, funcionais e genéticos. ACHADOS RECENTES: Estudos de imagem, post mortem e anatômicos demonstram evidências de uma redução ou reversão de aspectos de assimetria, particularmente no córtex de associação occipitotemporoparietal. Em alguns estudos, há interação com o sexo. Há evidências de que uma alteração no lobo temporal esquerdo é, às vezes, progressiva. Estudos funcionais acrescentam credibilidade ao conceito de que a lateralização da linguagem é reduzida e, em alguns casos, revertida. RESUMO: A dimensão da assimetria se destaca como a variável que pode dar significância às observações entre campos de investigação e que proporciona uma solução para a base genética da psicose. Estudos de gêmeos monozigóticos discordantes têm apresentado fortes indicações de que a variação relevante é epigenética; isso é consistente com a possibilidade de que a variação seja relacionada a alterações estruturais recentes (a transposição duplicativa Xq21.3/Yp dos cromossomos sexuais.OBJETIVO: Asimetría cerebral (el torque del frontal derecho al occipital izquierdo es la característica definidora del cerebro humano y, conforme al propuesto por Broca, el correlato neuronal putativo del lenguaje. Si, conforme a lo sugerido, la esquizofrenia es el precio que el Homo sapiens debe pagar por el lenguaje, el torque, juntamente con sus correlatos funcionales, es de importancia fundamental. Se revisan recientes evidencias obtenidas a partir de estudios

  19. Nuclear nirvana?

    Energy Technology Data Exchange (ETDEWEB)

    Sacks, T.

    1997-06-10

    This article describes a proposed method of processing high-level radioactive wastes from existing PWR reactors and weapons grade plutonium to produce relatively benign medium-level wastes, which is easier to handle and store. The energy amplifier proposed by Carlo Rubbia, ex-director-general of CERN, causes fission to occur as a result of nuclear cascades, rather than chain reactions, by bombarding a thorium-based mixture of radioactive materials with a high-intensity beam of sub-atomic particles. He claims that, as it depends largely on proven technology it could be in commercial operation with ten years, well ahead of even a prototype fusion reactor and thus provide a viable, sustainable and more environmentally acceptable power source. (Author).

  20. NUCLEAR REACTOR

    Science.gov (United States)

    Miller, H.I.; Smith, R.C.

    1958-01-21

    This patent relates to nuclear reactors of the type which use a liquid fuel, such as a solution of uranyl sulfate in ordinary water which acts as the moderator. The reactor is comprised of a spherical vessel having a diameter of about 12 inches substantially surrounded by a reflector of beryllium oxide. Conventionnl control rods and safety rods are operated in slots in the reflector outside the vessel to control the operation of the reactor. An additional means for increasing the safety factor of the reactor by raising the ratio of delayed neutrons to prompt neutrons, is provided and consists of a soluble sulfate salt of beryllium dissolved in the liquid fuel in the proper proportion to obtain the result desired.

  1. Nuclear exoticism

    Science.gov (United States)

    Penionzhkevich, Yu. E.

    2016-07-01

    Extreme states of nuclearmatter (such that feature high spins, large deformations, high density and temperature, or a large excess of neutrons and protons) play an important role in studying fundamental properties of nuclei and are helpful in solving the problem of constructing the equation of state for nuclear matter. The synthesis of neutron-rich nuclei near the nucleon drip lines and investigation of their properties permit drawing conclusions about the positions of these boundaries and deducing information about unusual states of such nuclei and about their decays. At the present time, experimental investigations along these lines can only be performed via the cooperation of leading research centers that possess powerful heavy-ion accelerators, such as the Large Hadron Collider (LHC) at CERN and the heavy-ion cyclotrons at the Joint Institute for Nuclear Research (JINR, Dubna), where respective experiments are being conducted by physicists from about 20 JINR member countries. The present article gives a survey of the most recent results in the realms of super neutron-rich nuclei. Implications of the change in the structure of such nuclei near the nucleon drip lines are discussed. Information about the results obtained by measuring the masses (binding energies) of exotic nuclei, the nucleon-distribution radii (neutron halo) and momentum distributions in them, and their deformations and quantum properties is presented. It is shown that the properties of nuclei lying near the stability boundaries differ strongly from the properties of other nuclei. The problem of the stability of nuclei that is associated with the magic numbers of 20 and 28 is discussed along with the effect of new magic numbers.

  2. Evaluation of the ICRU operational magnitudes implantation for the photon radiation at the Angra I and Angra II nuclear power plants; Avaliacao da implantacao das grandezas operacionais do ICRU para a radiacao de fotons nas usinas nucleares Angra I e II

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Ronaldo do Nascimento

    2006-07-01

    The measurements of photon radiation field intensity are usually performed by a radiation protection technician trained and having skill in using radiation rate meters. Nowadays, these measurements are reported on exposure quantity and used to protect exposed individuals against the radiation risks while executing their activities. The International Commission on Radiation Units and Measurements - ICRU - defined the operational quantity ambient equivalent dose H{sup *}(10). This quantity is accepted by the scientific community as the best estimative of the protection quantity effective dose, which can not be directly measured. The operational quantity H{sup *}(10) was introduced in Brazilian rules by the National Commission of Nuclear Energy - CNEN (2005a), although its adoption was conditioned to studies of convenience and applicability of implementation. The present work may contribute to these studies, as it presents the evaluation of H{sup *}(10)'s implementation at the Nuclear Central Almirante Alvaro Alberto - CNAAA. The evaluation involved radiological tests - the energy dependence and angular dependence - applied to six types of photon radiation rate meters utilized at the CNAAA, with represent around 83% of the total number of rate meters in use by CNAAA. The result of this evaluation is favorable to the quantity H{sup *}(10)'s implementation. Suggestions are presented in order to update de rate meters and the technical and administrative procedures related to the Laboratory of Calibration of Rate Meters - LCMR, belonging to CNAAA. Thus, it could be possible to perform the calibration of the rate meters at the nuclear installation. The results obtained allows to carry out new evaluations of H{sup *}(10)'s implementation on installations that perform measurements with radiation rate meters on the practice of radiation protection, in order to adopt the H{sup *}(10) quantity in our country. (author)

  3. Reconversion of nuclear weapons

    CERN Document Server

    Kapitza, Sergei P

    1993-01-01

    The nuclear predicament or nuclear option. Synopsis of three lectures : 1- The physical basis of nuclear technology. Physics of fission. Chain reaction in reactors and weapons. Fission fragments. Separration of isotopes. Radiochemistry.2- Nuclear reactors with slow and fast neutrons. Power, size, fuel and waste. Plutonium production. Dose rate, shielding and health hazard. The lessons of Chernobyl3- Nuclear weapons. Types, energy, blast and fallout. Fusion and hydrogen bombs. What to do with nuclear weapons when you cannot use them? Testing. Nonmilittary use. Can we get rid of the nuclear weapon? Nuclear proliferation. Is there a nuclear future?

  4. No Nuclear Worries

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    China National Nuclear Corp.will learn lessons from the Fukushima accident while expanding its operations As Japan’s Fukushima nuclear crisis sparks a global debate over nuclear safety,China National Nuclear Corp.(CNNC),the country’s largest nuclear power operator,comes under

  5. Trends in Nuclear Astrophysics

    OpenAIRE

    Schatz, Hendrik

    2016-01-01

    Nuclear Astrophysics is a vibrant field at the intersection of nuclear physics and astrophysics that encompasses research in nuclear physics, astrophysics, astronomy, and computational science. This paper is not a review. It is intended to provide an incomplete personal perspective on current trends in nuclear astrophysics and the specific role of nuclear physics in this field.

  6. Evaluation of the influence of percent labeling of {sup 99m}Tc-MIBI on nuclear medicine procedures in Recife, Pernambuco State, Brazil; Avaliacao da influencia do percentual de marcacao do {sup 99m}Tc-MIBI em procedimentos de medicina nuclear em Recife, PE

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Jucilene Maria

    2003-08-15

    The aim of this work was to evaluate the influence of percent labeling of the radiopharmaceutical {sup 99m}Tc-MIBI on the procedures adopted by the nuclear medicine clinics in Recife, Pernambuco State, Brazil, and their possible interference with image quality in myocardial perfusion examinations. This work was performed at two nuclear medicine services in Recife that use pharmaceuticals provided by two different manufacturers: Cardiolite, provided by Dupont and Cardiosyd, provided by SYDMA. The pH, percent labeling and stability of samples of {sup 99m}Tc-MIBI and the percent uptake in heart and liver of a number of patients were evaluated. The results showed that the pH values measured in all samples of both radiopharmaceuticals were within the limits recommended. In 48% of the Cardiolite samples, the percent labeling was less than 90%, which is the minimum recommended limit. On the other hand, 87,5% of the Cardiosyd samples measured values above 98%. Both radiopharmaceuticals had good labeling stability, even in samples with low percent labeling efficiencies. In spite of the higher percent labeling of Cardiosyd its heart uptake is similar to that observed with the Cardiolite, even when the percent labeling is lower than 90%. On the other hand, the image quality, according to physicians, evaluation was poorer for Cardiosyd images, due to high noise and poor sharpness. (author)

  7. 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

  8. Experimental study of the temperature distribution in the TRIGA IPR-R1 Brazilian research reactor; Investigacao experimental da distribuicao de temperaturas no reator nuclear de pesquisa TRIGA IPR-R1

    Energy Technology Data Exchange (ETDEWEB)

    Mesquita, Amir Zacarias

    2005-07-01

    The TRIGA-IPR-R1 Research Nuclear Reactor has completed 44 years in operation in November 2004. Its initial nominal thermal power was 30 kW. In 1979 its power was increased to 100 kW by adding new fuel elements to the reactor. Recently some more fuel elements were added to the core increasing the power to 250 kW. The TRIGA-IPR-R1 is a pool type reactor with a natural circulation core cooling system. Although the large number of experiments had been carried out with this reactor, mainly on neutron activation analysis, there is not many data on its thermal-hydraulics processes, whether experimental or theoretical. So a number of experiments were carried out with the measurement of the temperature inside the fuel element, in the reactor core and along the reactor pool. During these experiments the reactor was set in many different power levels. These experiments are part of the CDTN/CNEN research program, and have the main objective of commissioning the TRIGA-IPR-R1 reactor for routine operation at 250 kW. This work presents the experimental and theoretical analyses to determine the temperature distribution in the reactor. A methodology for the calibration and monitoring the reactor thermal power was also developed. This methodology allowed adding others power measuring channels to the reactor by using thermal processes. The fuel thermal conductivity and the heat transfer coefficient from the cladding to the coolant were also experimentally valued. lt was also presented a correlation for the gap conductance between the fuel and the cladding. The experimental results were compared with theoretical calculations and with data obtained from technical literature. A data acquisition and processing system and a software were developed to help the investigation. This system allows on line monitoring and registration of the main reactor operational parameters. The experiments have given better comprehension of the reactor thermal-fluid dynamics and helped to develop numerical

  9. Nuclear analytical chemistry

    Energy Technology Data Exchange (ETDEWEB)

    Brune, D.; Forkman, B.; Persson, B.

    1984-01-01

    This book covers the general theories and techniques of nuclear chemical analysis, directed at applications in analytical chemistry, nuclear medicine, radiophysics, agriculture, environmental sciences, geological exploration, industrial process control, etc. The main principles of nuclear physics and nuclear detection on which the analysis is based are briefly outlined. An attempt is made to emphasise the fundamentals of activation analysis, detection and activation methods, as well as their applications. The book provides guidance in analytical chemistry, agriculture, environmental and biomedical sciences, etc. The contents include: the nuclear periodic system; nuclear decay; nuclear reactions; nuclear radiation sources; interaction of radiation with matter; principles of radiation detectors; nuclear electronics; statistical methods and spectral analysis; methods of radiation detection; neutron activation analysis; charged particle activation analysis; photon activation analysis; sample preparation and chemical separation; nuclear chemical analysis in biological and medical research; the use of nuclear chemical analysis in the field of criminology; nuclear chemical analysis in environmental sciences, geology and mineral exploration; and radiation protection.

  10. Mean nuclear volume

    DEFF Research Database (Denmark)

    Mogensen, O.; Sørensen, Flemming Brandt; Bichel, P.

    1999-01-01

    We evaluated the following nine parameters with respect to their prognostic value in females with endometrial cancer: four stereologic parameters [mean nuclear volume (MNV), nuclear volume fraction, nuclear index and mitotic index], the immunohistochemical expression of cancer antigen (CA125...

  11. Cold nuclear fusion

    National Research Council Canada - National Science Library

    Huang Zhenqiang Huang Yuxiang

    2013-01-01

    ...... And with a magnetic moment of light nuclei controlled cold nuclear collide fusion, belongs to the nuclear energy research and development in the field of applied technology "cold nuclear collide fusion...

  12. Nuclear Quadrupole Moments and Nuclear Shell Structure

    Science.gov (United States)

    Townes, C. H.; Foley, H. M.; Low, W.

    1950-06-23

    Describes a simple model, based on nuclear shell considerations, which leads to the proper behavior of known nuclear quadrupole moments, although predictions of the magnitudes of some quadrupole moments are seriously in error.

  13. Nuclear energy data 2010

    CERN Document Server

    2010-01-01

    This 2010 edition of Nuclear Energy Data , the OECD Nuclear Energy Agency's annual compilation of official statistics and country reports on nuclear energy, provides key information on plans for new nuclear plant construction, nuclear fuel cycle developments as well as current and projected nuclear generating capacity to 2035 in OECD member countries. This comprehensive overview provides authoritative information for policy makers, experts and other interested stakeholders.

  14. Consolidation: Thwarting Nuclear Theft

    OpenAIRE

    Bunn, Matthew G.; Harrell, Eben

    2013-01-01

    At the first nuclear security summit in April 2010, the assembled leaders agreed on the goal of securing all vulnerable nuclear material worldwide within four years, including consolidating plutonium and highly enriched uranium (HEU) to fewer locations and minimizing the use of HEU “where technically and economically feasible.†Reducing the number of buildings and sites where nuclear weapons and weapons-usable nuclear material exist is a key element of preventing nuclear theft and nuclear ...

  15. Nuclear Fuel Cycle & Vulnerabilities

    Energy Technology Data Exchange (ETDEWEB)

    Boyer, Brian D. [Los Alamos National Laboratory

    2012-06-18

    The objective of safeguards is the timely detection of diversion of significant quantities of nuclear material from peaceful nuclear activities to the manufacture of nuclear weapons or of other nuclear explosive devices or for purposes unknown, and deterrence of such diversion by the risk of early detection. The safeguards system should be designed to provide credible assurances that there has been no diversion of declared nuclear material and no undeclared nuclear material and activities.

  16. Nuclear Entalpies

    CERN Document Server

    Rozynek, J

    2013-01-01

    In a compressed Nuclear Matter (NM) an increasing pressure between the nucleons starts to increase the ratio of a nucleon Fermi to average single particle energy and in accordance with the Hugenholtz-van Hove theorem the longitudinal Momentum Sum Rule (MSR) is broken in a Relativistic Mean Field (RMF) approach. We propose to benefit from the concept of enthalpy in order to show how to fulfill the MSR above a saturation density with pressure corrections. As a result a nucleon mass can decrease with density, making the Equation of State (EoS) softer. The course of the EoS in our modified RMF model is close to a semi-empirical estimate and to results obtained from extensive DBHF calculations with a Bonn A potential, which produce the EoS stiff enough to describe neutron star properties (mass-radius constraint), especially the most massive known neutron star. The presented model has proper saturation properties, including good values of a compressibility and a spin-orbit term.

  17. Nuclear Data and Nuclear Model Methods

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Developing nuclear data needs towards to sustainable development on fission reactor design and many nuclear applications out the field of fission reactor technology that are growing economicsignificance and that have substantial data requirements are introduced. International standard codes used in nuclear data evaluations and calculations are introduced and compared each other. Generally

  18. Nuclear energy data 2011

    CERN Document Server

    2011-01-01

     . Nuclear Energy Data, the OECD Nuclear Energy Agency's annual compilation of statistics and country reports on nuclear energy, contains official information provided by OECD member country governments on plans for new nuclear plant construction, nuclear fuel cycle developments as well as current and projected nuclear generating capacity to 2035. For the first time, it includes data for Chile, Estonia, Israel and Slovenia, which recently became OECD members. Key elements of this edition show a 2% increase in nuclear and total electricity production and a 0.5% increase in nuclear generating ca

  19. Nuclear weapons modernizations

    Energy Technology Data Exchange (ETDEWEB)

    Kristensen, Hans M. [Federation of American Scientists, Washington, DC (United States)

    2014-05-09

    This article reviews the nuclear weapons modernization programs underway in the world's nine nuclear weapons states. It concludes that despite significant reductions in overall weapons inventories since the end of the Cold War, the pace of reductions is slowing - four of the nuclear weapons states are even increasing their arsenals, and all the nuclear weapons states are busy modernizing their remaining arsenals in what appears to be a dynamic and counterproductive nuclear competition. The author questions whether perpetual modernization combined with no specific plan for the elimination of nuclear weapons is consistent with the nuclear Non-Proliferation Treaty and concludes that new limits on nuclear modernizations are needed.

  20. Simulation of a postulated loss of coolant accident due to a break in the pressurizer surge line of Angra 2 Nuclear Power Plan; Calculo do acidente postulado de perda de refrigerante por uma ruptura na linha de surto do pressurizador da central nuclear Angra 2

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Carlos V. Goulart de; Palmieri, Elcio T.; Aronne, Ivan D. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)]. E-mail: cvga@cdtn.br; etp@cdtn.br; aroneid@cdtn.br

    2005-07-01

    This work presents the simulation of a postulated loss of coolant accident due to a 437 cm{sup 2} break in the pressurizer surge line of Angra 2 Nuclear Power Plant, as described in its Final Safety Analysis Report, section 15.6.4.1.3.11. This accident is characterized by a fast depressurization of the reactor coolant system followed by the actuation of the safety injection system. This work, which aims to develop and qualify a basic Angra 2 nodalization for RELAP5, was done in the framework of a CNEN internal technical cooperation involving three of its research centers (CDTN, IPEN and IEN) and its Reactors Division. This simulation is part of a comprehensive number of accidents and transients necessary to verify the adequacy of the modeled logic of the control and protection systems as well as the performance of the modeled thermal-hydraulic systems. Therefore this work contributes to the qualification process of the developed nodalization. (author)

  1. Aplicações da tomografia de ressonância magnética nuclear como método não-destrutivo para avaliar os efeitos de injúrias mecânicas em goiabas 'Paluma' e 'Pedro Sato' Applications of the nuclear magnetic resonance tomography as a non-destructive method to evaluate the effects of mechanical injuries in 'Paluma' and 'Pedro Sato' guavas

    Directory of Open Access Journals (Sweden)

    Ben-Hur Mattiuz

    2002-12-01

    Full Text Available Objetivou-se determinar o potencial do uso da tomografia de ressonância magnética, como método não-destrutivo, para avaliar os efeitos das injúrias mecânicas em goiabas. Foram utilizados frutos no estádio de maturação "de vez" das cultivares Paluma e Pedro Sato. Na injúria por impacto, os frutos foram deixados cair, em queda livre, de uma altura de 1,20 m, sofrendo dois impactos, em lados opostos de sua porção equatorial. Na injúria por compressão, os frutos foram submetidos a um peso de 29,4 N, por 15 minutos. Para a injúria por corte, foram efetuados dois cortes, no sentido longitudinal dos frutos, de exatamente 30 mm de comprimento por 2 mm de profundidade. Os frutos injuriados foram armazenados sob condições de ambiente (22 ± 2 °C e 40 %UR. Foram realizadas análises com tomógrafo de ressonância magnética Varian Inova de 2 Tesla. As imagens foram obtidas a partir da detecção dos prótons de hidrogênio (¹H. Para cada fruto, foram obtidos tomogramas simétricos a partir do centro do fruto. A tomografia de ressonância magnética nuclear mostrou-se uma ferramenta eficaz na detecção de injúrias internas de frutos. O estresse físico causado pelo impacto produziu um colapso interno nos lóculos desses frutos (internal bruising, levando à perda da integridade celular e a conseqüente liquefação dos tecidos placentários. A cultivar Pedro Sato mostrou uma suscetibilidade maior à injúria por impacto que a 'Paluma'. A injúria por compressão tornou-se mais evidente no pericarpo externo do fruto, de ambas as cultivares. A injúria por corte levou a lignificação dos tecidos no local injuriado e deformações superficiais devido à perda acentuada de matéria fresca no local da lesão, evidentes no sexto dia de avaliação.The present study reports on the potential of the use of the tomography of magnetic resonance, as a non-destructive method, to evaluate the effects of the mechanical injuries in guava fruits

  2. A Sintaxe da Janela

    Directory of Open Access Journals (Sweden)

    Luís Antônio Jorge

    1993-12-01

    Full Text Available A preocupação fundamenta! do trabalho é de caráter ontológico: esboçar o problema das significações apriorísticas e autônomas dos elementos que compõem a sintaxe arquitetônica. O trabalho elege um desses elementos: a janela. Este artigo parte da aproximação histórica entre a janela e a secção da pirâmide visual, construção imaginária da teoria da perspectiva renascentista. A consideração da janela na linguagem arquitetônica implica reconhecer uma ambigüidade essencial: a janela deve inserir-se ordenadamente no plano da parede - raciocínio típico da modenatura - mas também relacionar-se com a imagem vista através dela, que extrapola o plano, ressaltando a tridimensionalidade - herança da perspectiva renascentista, fundamentada no espaço euclidiano. Ver janela ou ver através da janela são alternativas que se colocam tanto ao observador interno ao edifício, quanto ao externo. Texto de duplaface, a sintaxe da janela versa sobre o relacionamento desses dois lados

  3. JPRS Report, Nuclear Developments

    Science.gov (United States)

    2016-03-24

    I Foreign Ministry on Algerian Nuclear Reactor [ZHONGGUO XINWEN SHE] .............................. I...Nuclear Facilities Urged [Seoul YONHAP] .................................................... 5 WPK’s ’Anti- War , Anti-Nuke’ Policy Viewed [KCNA...34 JPRS-TND-91-008 31 May 1991 CHINA 1 Algerian Nuclear Reactor Algeria signed a protocol on nuclear cooperation, in which China agreed

  4. Ensuring Nuclear Safety

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The Fukushima accident precipitates overall safety inspection by China Guangdong Nuclear Power Holding Corp The Fukushima nuclear accident in Japan had barely made headlines around the world when China Guangdong Nuclear Power Holding Corp.(CGNPC),a nuclear power magnate in China,organized

  5. Caracterização dos constituintes poliméricos da Maytenus ilicifolia por relaxação nuclear de ¹H por RMN no estado sólido Characterization of Maytenus ilicifolia Samples by ¹H NMR relaxation in the solid state

    Directory of Open Access Journals (Sweden)

    Mônica S. de M. Preto

    2011-01-01

    Full Text Available A Maytenus ilicifolia, conhecida como espinheira-santa, é uma planta popular de uso diverso, como chá é empregada no combate a problemas de doenças gástricas e da diabetes, por exemplo. As plantas possuem em sua constituição polímeros naturais como polissacarídeos, politerpenoides, celulose e fibras. O estudo dos constituintes poliméricos nesse tipo de material tem importância fundamental tanto na identificação, ou seja, qualificação quanto na adulteração da planta. É sabido que podem ser encontrados diversos produtos rotulados como sendo originário da mesma planta, entretanto, muitas das vezes a origem da planta é similar, mas não a mesma, o que pode gerar algum desconforto ou não atividade biológica dos chás quando da ingestão destes. Na literatura não são encontrados muitos trabalhos que envolvam a caracterização comparativa dos constituintes poliméricos, como polissacarídeos e fibras presentes em amostras de origens distintas, para comprovação de adulteração destes produtos. Uma técnica que pode ser promissora para este tipo de estudo é a Ressonância Magnética Nuclear (RMN em estado sólido, já que permite analisar a amostra in natura não sendo um método destrutivo ou invasivo. Esta espectroscopia analisa amostras em campos magnéticos de diferentes potências ou forças. Neste trabalho é apresentado um estudo de caracterização dos constituintes poliméricos majoritários presentes na M. ilicifolia. Três amostras foram estudadas: uma amostra denominada controle e duas comerciais. O estudo envolveu a determinação dos tempos de relaxação spin-rede (T1 do ¹H utilizando a técnica de campo cíclico rápido (FFC, numa gama de frequências que variou de 100 kHz a 10 MHz. Assim, o principal objetivo deste trabalho foi estudar a possibilidade de utilização da RMN de baixo campo magnético na elaboração de um método expedito de análise que permita realizar a caracterização estrutural

  6. Quantitative model of evaluation of the contribution of each radioactive source in the individual external dose Hx in nuclear medicine service personnel; Modelo quantitativo de avaliacao da contribuicao de cada fonte radioativa na dose individual externa Hx em trabalhador de servico de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Nathalie Canhameiro; Tinois, Eduardo; Koga, Katia Hiromoto; Bezerra, Aline da Silva; Ferreira, Vinicius Capistrano; Azevedo, Thaisa Resende; Moriguchi, Sonia Marta, E-mail: soniamoriguchi@fmb.unesp.br [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Faculdade de Medicina. Hospital das Clinicas

    2016-07-01

    Assess whether the activities performed in the Nuclear Medicine service are significant in the total dose received by the workers and their relative contributions. Methods: measured independent variables: number of scintigraphies remaining in the examination room (N); eluted activity (E); Total activity marked in pharmaceuticals kits (K); num-ber of times that was scheduled to work in the Hot room (Q); Variable dependent measured: cumulative effective dose in the period 10/2012 to 04/2013 added to each worker, obtained by information registered daily and monthly on activities and doses received in the period. Held Multiple Linear Regression (D = a + β{sub 1} N + E + β{sub 2} β{sub 3} K + β{sub 4} Q) with α = 0.05 significance level. It was concluded that the independent variables N (p = 0.097) and E (p = 0.086) did not significantly interfere with the Cumulative dose in the period. The K variables (p = 0.017) and Q (p = 0.028) were significant in the proposed model. (author)

  7. Application of FMEA-DEA (Failure Modes and Effect Analysis - Data Envelopment Analysis) to the air conditioning system of the control room a nuclear power plant; Aplicacao de FMEA-DEA ao sistema de ar condicionado da sala de controle de uma usina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa Junior, Gilberto Varanda

    2007-03-15

    This dissertation presents the FMEA-DEA analysis application to the air conditioning system of the control room of a nuclear power plant. After obtaining the failure modes, the index associated to the occurrence probability, the severity of the effects and the potential of detention, a priority order is established for the failure modes or deviations. This number is obtained by multiplying the three mentioned index that vary in a natural scale from 1 to 10, where the higher the index, the more critical the situation will be. In this work, it is intended to use a model based on the data envelopment analysis, DEA jointly with the FMEA, to identify the current efficiency of the system and which failure modes or deviations are considered more critical, and by means of the weights attributed for the mathematical modeling to identify which index are contributing more for these deviations. From this identification, improvements can be set, which may consider administrative changes, operator training and so on, thus adding value to the final product. (author)

  8. An application of modulated poisson processes to aging evaluation for the extension of qualified life of nuclear power plant equipment; Uma aplicacao de processos pontuais modulados a avaliacao do envelhecimento para a extensao da vida qualificada de equipamentos de centrais nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Saldanha, Pedro Luiz da Cruz

    2003-03-01

    The modulated power law process (MPLP) is a three-parameter stochastic point process model that can be used to describe the failures time of reparable systems. While the power law process implies that a system is exactly on the same condition just after a repair as just before a failure, the MPLP allows for the system to be affected both by failure and repair. For this reason this model is adequate for evaluating the recurrent events that incorporate both time trends and effects of past events such as the renewal type behavior. The purpose of this study is to evaluate the MPLP as a model for the rate of occurrence of failures of a repairable system to decide for an extension of qualified life in the context of licence renewal of a nuclear power plant. Standard statistical techniques, such as the maximum likelihood and linear regression models, are applied to estimate parameters of the MPLP. As a conclusion of the study, the MPLP is adequate for modelling rate of occurrence of failures that are time dependent, and can be used where the aging mechanisms are present in the operation of repairable systems. (author)

  9. Lagrangian modeling of atmospheric dispersion of radionuclides and geographical information systems as tools to support emergency planning in area of influence of nuclear complex of Angra dos Reis, RJ, Brazil; Modelagem Lagrangeana da dispersao atmoferica de radionuclideos e sistemas de informacao geografica como ferramentas de suporte ao planejamento de emergencia na area de influencia do complexo nuclear de Angra dos Reis, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Corbiniano

    2013-07-01

    Industrial accidents generally endanger structures and the set of environmental influence area where the enterprises are located, especially when affected by atmospheric dispersion of their pollutants, whose concern with the evacuation of the population is the main goal in emergency situations. Considering the nuclear complex Angra dos Reis - RJ, based on computer modeling analysis of the mechanisms of pollutant dispersion in conjunction with geographic information systems were developed. Thus, information about the dispersion of radionuclides - from simulations performed on the HYSPLIT; meteorological data (direction, intensity and calm on the wind regime and analysis of the wind field in the region using WRF), occurrence of landslides and data on the environmental study area were integrated into a GIS database using ArcGIS platform. Aiming at the identification and definition of escape routes in case of evacuation from accidental events in CNAAA, the results point solutions for long-term planning, based on weather and landslides, and short-term, supported by simulations of the dispersion radionuclides, in order to support actions that assist local emergency planning. (author)

  10. Energy from nuclear fission(*

    Directory of Open Access Journals (Sweden)

    Ripani M.

    2015-01-01

    Full Text Available The main features of nuclear fission as physical phenomenon will be revisited, emphasizing its peculiarities with respect to other nuclear reactions. Some basic concepts underlying the operation of nuclear reactors and the main types of reactors will be illustrated, including fast reactors, showing the most important differences among them. The nuclear cycle and radioactive-nuclear-waste production will be also discussed, along with the perspectives offered by next generation nuclear assemblies being proposed. The current situation of nuclear power in the world, its role in reducing carbon emission and the available resources will be briefly illustrated.

  11. [Chilean nuclear policy].

    Science.gov (United States)

    Bobadilla, E

    1996-06-01

    This official document is statement of the President of the Chilean Nuclear Energy Commission, Dr. Eduardo Bobadilla, about the nuclear policy of the Chilean State, Thanks to the international policy adopted by presidents Aylwin (1990-1994) and his successor Frei Ruiz Tagle (1994-), a nuclear development plan, protected by the Chilean entrance to the nuclear weapons non proliferation treaty and Tlatelolco Denuclearization treaty, has started. Chile will be able to develop without interference, an autonomous nuclear electrical system and other pacific uses of nuclear energy. Chile also supports a new international treaty to ban nuclear weapon tests.

  12. Características morfofisiológicas associadas à tolerância à seca em sete genótipos da coleção nuclear de trevo branco Morphophysiological traits associated with drought tolerance in seven genotypes of the white clover core collection

    Directory of Open Access Journals (Sweden)

    Fernanda Bortolini

    2011-09-01

    Full Text Available O trevo branco é uma leguminosa forrageira muito importante para utilização em pastagens temperadas no Rio Grande do Sul. Entretanto, ele é mais sensível ao déficit de água no solo do que as outras leguminosas perenes, apresentando problemas de persistência no verão. Com o objetivo de determinar características morfofisiológicas relacionadas à resposta ao déficit hídrico dessa espécie, foi realizado um experimento em casa-de-vegetação, o qual avaliou o efeito da disponibilidade hídrica (90 e 40% da umidade de capacidade de campo do solo sobre sete acessos pertencentes à Coleção Nuclear de Trevo Branco do Departamento de Agricultura dos Estados Unidos (USDA. O delineamento experimental utilizado foi inteiramente casualizado, com quatro repetições, totalizando 56 vasos. Foram realizadas duas avaliações, aos 130 e aos 196 dias após a semeadura, ocasião em que foram avaliadas diversas características morfofisiológicas. A análise dos resultados indicou que o déficit hídrico teve um efeito marcante sobre a altura de plantas (EST, área foliar (AF, número de folhas vivas (NFV, comprimento de estolão (CES, produção de massa seca (MSPA, taxa fotossintética (A, condutância (g e eficiência do uso da água (EUA. Nas duas avaliações, em ambas as disponibilidades hídricas, verificaram-se correlações positivas e significativas (PThe white clover is a forage legume very important for use in temperate pastures in Rio Grande do Sul. However it is more sensitive to water deficit in the soil than other perennial legumes, presenting a lack of persistence in the summer. With the objective of determining morphophysiological traits related to the answer to the water deficit of this species, an experiment was carried out in greenhouse, which evaluated the effect of water availability (90 and 40% of the soil moisture field capacity on seven genotypes belonging to the white clover core collection from the United States

  13. Nuclear energy data 2005

    CERN Document Server

    Publishing, OECD

    2005-01-01

    This 2005 edition of Nuclear Energy Data, the OECD Nuclear Energy Agency's annual compilation of essential statistics on nuclear energy in OECD countries, offers a projection horizon lengthened to 2025 for the first time.  It presents the reader with a comprehensive overview on the status and trends in nuclear electricity generation in OECD countries and in the various sectors of the nuclear fuel cycle.

  14. Genealogias da alegria

    Directory of Open Access Journals (Sweden)

    Bruno Vasconcelos de Almeid

    2009-08-01

    Full Text Available Genealogias da Alegria tem por objetivo rastrear conceitos e construir planos sobre os quais podemos pensar a alegria como campo problemático. Trata-se de traçar linhas e acoplar fragmentos históricos e literários com a finalidade de subsidiar a discussão contemporânea em torno da alegria. O procedimento genealógico vale-se de trechos das obras de Calímaco e Luciano de Samósata, da elegia erótica romana e da alegria cristã. O passo seguinte consiste em rastrear o pensamento da alegria na obra de Gilles Deleuze, especialmente em três momentos: uma passagem de Diferença e Repetição, um trecho dos Diálogos extraído de Da Superioridade da Literatura Anglo-americana e a comunicação Pensamento Nômade no Colóquio de Cerisy. A alegria não se define como sentimento ou emoção; ao contrário, está ligada à premissa de afirmação da vida e ao caráter trágico da existência.

  15. A sabedoria da democracia

    Directory of Open Access Journals (Sweden)

    Gilson Matilde Diana

    2010-01-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2010v9n1p131Durante a maior parte da história, a democracia foi desprezada como uma forma política inferior – a regra do povo, ou “dos muitos”, era logo identificada como a regra da ralé, da escória. Herdando do povo a volubilidade e a instabilidade, a democracia estava sempre perigosamente próxima do arbítrio e da anarquia, com toda a violência que se costuma associar a isso.

  16. Radionuclides used in nuclear medicine ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) in sewage system and in the marine environment of Rio de Janeiro city, RJ, Brazil; Radionuclideos usados em medicina nuclear ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) no sistema de esgoto e no ambiente marinho da cidade do Rio de Janeiro, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Daniele Santos de

    2014-08-01

    The nuclear medicine is a specialty that uses radioisotopes for diagnostic or therapeutic purpose. In Brazil there are around 340 Nuclear Medicine Services (NMS), 27 of them, are located in the city of Rio de Janeiro. The most widely used radionuclides in the country are {sup 131}I and {sup 99m}Tc. The radionuclide {sup 99m}Tc decays to {sup 99}Tc, which is a beta emitter with a long half-life (10{sup 5} years). The aim of this study is to perform a survey to estimate the {sup 131}I and {sup 99}Tc discharged levels at the Canal do Cunha, the main pathways for environmental dispersion and evaluate the radiological impact to non-human biota and to the populations exposed to these radionuclides. The Alegria Station receives sewage from most clinics of Rio de Janeiro mid was therefore chosen as a study case. The station receives approximately 4.50 x 10{sup 5} Bq/year of {sup 99}Tc e 7.12 x 10{sup 12} Bq/year of {sup 131}I. After passing through all stages of treatment, the effluent is discharged into the Canal do Cunha and flows into the Guanabara Bay. To assess the radiological impact of these radionuclide discharges, a comparative study was made considering three computational models: the CROM, which is based on a model of the International Atomic Energy Agency (IAEA), the PC-CREAM, widely used by the European Union and the GENII, which is the most widely used model in the United States. Two exposure scenarios were considered: 1 - people that bathe directly in the discharge of the effluent; 2 - community living 1200 meters from the discharge point, bathing in the river and consuming local fish. Concentration and doses values for the scenarios according to the applicability of each computer code were estimated. The dose values at the discharge point were 7.47 x 10{sup -6}mSv for {sup 131}I and 2.87 x 10{sup -14} mSv for {sup 99}Tc, while for scenario II the value of the total dose was approximately 10{sup -1} mSv/year for {sup 131}I and 10{sup -10} mSv/year for {sup

  17. Survey of nuclear parameters from the TRIGA Mark I IPR R1 Brazilian reactor with concentric configuration aiming the application of K{sub 0} neutron activation technique; Levantamento de parametros nucleares do reator TRIGA Mark I IPR R1 com configuracao concentrica visando a aplicacao da tecnica de ativacao neutronica K{sub 0}

    Energy Technology Data Exchange (ETDEWEB)

    Franco, Milton Batista

    2006-07-01

    This research intended to determine the nuclear parameters a, f, spectral index and neutron temperature in several irradiations positions of the TRIGA Mark 1 IPR-R1 reactor, for use on the parametric method K{sub 0} in the CDTN. K{sub 0} is a monostandard method of neutron activation analysis. It is, on the whole, experimentally simple, flexible and an important tool for accurate and convenient standardization in instrumental multi-element analysis. At the time the parameters were determined at the rotatory rack, lower layer and in the central thimble: alpha was calculated applying the three bare monitor method using {sup 197}Au, {sup 94}Zr and {sup 96}Zr; f determination was done according to the bare bi-isotopic method; neutron temperature was calculated through the direct method using {sup 176}Lu, {sup 94}Zr, {sup 96}Zr and {sup 197}Au and the Westcott's g(Tn) function for the {sup 176}Lu was calculated and the result was interpolated in the Grintakis and Kim (1975) Table, determining the neutron temperature. The procedure to check the parameters consisted in using standard solutions of Au (metal foil, NBS), Lu (LuO{sub 2}, Johnson Mattey Company - JMC) and Zr (ZrO{sub 2} and metal foil, Johnson Mattey Company 99,99% and Zry - 4: 98,14% of Zr, National Bureau of Standard- NBS). Several certified reference materials and two samples of intercomparisons (samples of sediment of the IAEA/ARCAL XXVI project) have been analysed by means of k{sub 0}- INAA in order to verify the efficiency of the method and the quality of the parameters. The certified reference materials were: GXR-2, GXR-5 and GXR-6 of the United States Geological Survey (USGS) and Soil-5, Soil-7 and SL-1 of the International Atomic Energy Agency (IAEA). (author)

  18. 77 FR 70847 - Entergy Nuclear Indian Point 2, LLC; Entergy Nuclear Operations, Inc., Indian Point Nuclear...

    Science.gov (United States)

    2012-11-27

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Entergy Nuclear Indian Point 2, LLC; Entergy Nuclear Operations, Inc., Indian Point Nuclear Generating Unit No. 2, Request for Action AGENCY: Nuclear Regulatory Commission. ACTION: Request for...

  19. Corporeidade da voz : estudo da vocalidade poetica

    OpenAIRE

    Fernando Manoel Aleixo

    2004-01-01

    Resumo: Este material é o resultado da investigação prática da voz realizada a partir do desenvolvimento do princípio da sabedoria sensível do corpo. O texto expõe as etapas percorridas no levantamento de experiências e reflexões pedagógicas sobre a voz do ator, no estabelecimento de referências sobre o corpo e o aprendizado sensível e, também, no processo de composição poética do espetáculo teatral Voz Mercê Abstract: This material springs from a practical investigative work on voice base...

  20. Modelagem da laringe: da biologia ao computador

    Directory of Open Access Journals (Sweden)

    Marcelo de Oliveira Rosa

    2016-01-01

    Full Text Available Neste trabalho apresentamos uma descrição daanatomia e fisiologia da laringe, enfatizando os aspectos relevantes à fonação. A partir destes aspectos, a modelagem da laringe é apresentada. O principal objetivo de modelara laringe é representar de uma maneira simples esse órgãoatravés de equações matemáticos intimamente relacionadoscom características fisiológicas. Equações aerodinâmicase viscoelásticas são simplificadas de acordo com as pesquisas,sempre buscando simplicidade e aplicabilidade computacional. Assim, pesquisadores podem compreender melhor a laringe e a fala humana em termos dos efeitos linguísticos, cirúrgicos e computacionais produzidos pelamovimentação desse órgão. Palavras-chave: Laringe, modelagem, sinal glotal,produção da fala.

  1. Technology Roadmaps: Nuclear Energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    This nuclear energy roadmap has been prepared jointly by the IEA and the OECD Nuclear Energy Agency (NEA). Unlike most other low-carbon energy sources, nuclear energy is a mature technology that has been in use for more than 50 years. The latest designs for nuclear power plants build on this experience to offer enhanced safety and performance, and are ready for wider deployment over the next few years. Several countries are reactivating dormant nuclear programmes, while others are considering nuclear for the first time. China in particular is already embarking on a rapid nuclear expansion. In the longer term, there is great potential for new developments in nuclear energy technology to enhance nuclear's role in a sustainable energy future.

  2. A ciclovia da morte

    OpenAIRE

    Gois, Ancelmo

    2016-01-01

    De acordo com levantamento da FGV/DAPP, houve mais de 36 mil menções ao desabamento no Twi er, até o fim da tarde de ontem, com palavras como "vergonha", "incompetência" e "culpa" em destaque, além de muitas criticas ao prefeito Eduardo Paes.

  3. Nuclear and radiochemistry

    CERN Document Server

    Konya, Jozsef

    2012-01-01

    The field of nuclear and radiochemistry is wide-reaching, with results having functions and use across a variety of disciplines. Drawing on 40 years of experience in teaching and research, this concise book explains the basic principles and applications of the primary areas of nuclear and radiochemistry. Separate chapters cover each main area of recent radiochemistry. This includes nuclear medicine and chemical aspects of nuclear power plants, namely the problems of nuclear wastes and nuclear analysis (both bulk and surface analysis), with the analytical methods based on the interactions of

  4. Cartografia da paisagem alterada

    Directory of Open Access Journals (Sweden)

    Simone Cortezão

    2011-04-01

    Full Text Available O presente trabalho de pesquisa surge da investigação de paisagens alteradas, áreas pós-industriais e da geografia urbana que é conformada pela indústria. A preocupação principal é revê-las como espaço de investigação crítica sob o ponto de vista particular, integradas às noções da peculiar natureza industrial com suas consequentes transformações na paisagem, além das relações do indivíduo com esse novo meio produzido. “Cartografia da paisagem alterada” é uma pesquisa que indicia a paisagem alterada em pelo menos dois estratos: um que é o da construção da geografia da cidade pela indústria, e o outro que é a paisagem alterada subjetivamente, o que configura uma crítica e uma reação à conformação sócio geográfica em outros parâmetros - da proximidade, da experiência vivida e da construção de um vocabulário próprio.  A pesquisa teórica sobre áreas pós-industriais, associada a referências nas artes e arquitetura, constitui o primeiro estrato. Teorias e procedimentos artísticos de Robert Smithson, Joseph Beuys e Rem Koolhaas fornecem material para o segundo, mediante a pesquisa do cotidiano no lugar, a região do Vale do Aço, que se configura em um guia - glossário

  5. Nuclear domains and the nuclear matrix.

    Science.gov (United States)

    van Driel, R; Wansink, D G; van Steensel, B; Grande, M A; Schul, W; de Jong, L

    1995-01-01

    This overview describes the spatial distribution of several enzymatic machineries and functions in the interphase nucleus. Three general observations can be made. First, many components of the different nuclear machineries are distributed in the nucleus in a characteristic way for each component. They are often found concentrated in specific domains. Second, nuclear machineries for the synthesis and processing of RNA and DNA are associated with an insoluble nuclear structure, called nuclear matrix. Evidently, handling of DNA and RNA is done by immobilized enzyme systems. Finally, the nucleus seems to be divided in two major compartments. One is occupied by compact chromosomes, the other compartment is the space between the chromosomes. In the latter, transcription takes place at the surface of chromosomal domains and it houses the splicing machinery. The relevance of nuclear organization for efficient gene expression is discussed.

  6. Nuclear Security for Floating Nuclear Power Plants

    Energy Technology Data Exchange (ETDEWEB)

    Skiba, James M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Scherer, Carolynn P. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-10-13

    Recently there has been a lot of interest in small modular reactors. A specific type of these small modular reactors (SMR,) are marine based power plants called floating nuclear power plants (FNPP). These FNPPs are typically built by countries with extensive knowledge of nuclear energy, such as Russia, France, China and the US. These FNPPs are built in one country and then sent to countries in need of power and/or seawater desalination. Fifteen countries have expressed interest in acquiring such power stations. Some designs for such power stations are briefly summarized. Several different avenues for cooperation in FNPP technology are proposed, including IAEA nuclear security (i.e. safeguards), multilateral or bilateral agreements, and working with Russian design that incorporates nuclear safeguards for IAEA inspections in non-nuclear weapons states

  7. A medicina nuclear no diagnóstico dos tumores gastroenteropancreáticos

    OpenAIRE

    Rodrigues, Andreia; Silva, Patrícia Cirne

    2011-01-01

    Objectivo do estudo - Demonstrar o contributo, essencial, que a Medicina Nuclear apresenta no diagnóstico dos Tumores Gastroenteropancreáticos e demonstrar a importância da precocidade diagnóstica recorrendo, maioritariamente, aos exames de medicina nuclear.

  8. Repurposing an irradiated instrumented TRIGA fuel element for regular use

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Paulo F.; Souza, Luiz C.A., E-mail: pfo@cdtn.br, E-mail: lcas@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2015-07-01

    TRIGA IPR-R1 is a research reactor also used for training and radioisotope production, located at the Centro de Desenvolvimento da Tecnologia Nuclear da Comissao Nacional de Energia Nuclear (Nuclear Technology Development Centre, Brazilian National Nuclear Energy Commission - CDTN/CNEN). Its first criticality occurred in November 1960. All original fuel elements were aluminum-clad. In 1971 nine new fuel elements, stainless steel-clad were acquired. One of them was an instrumented fuel element (IFE), equipped with 3 thermocouples. The IFE was introduced into the core only on August 2004, and remained there until July 2007. It was removed from the core after the severing of contacts between the thermocouples and their extension cables. After an unsuccessful attempt to recover electrical access to the thermocouples the IFE was transferred from the reactor pool to an auxiliary spent fuel storage well, with water, in the reactor room. In December 2011 the IFE was transferred to an identical well, dry, where it remains so far. This work is a proposal for recovery of this instrumented fuel element, by removing the cable guide rod and adaptation of a superior terminal plug similar to conventional fuel elements. This will enable its handling through the same tool used for regular fuel elements and its return to the reactor core. This is a delicate intervention in terms of radiological protection, and will require special care to minimize the exposure of operators. (author)

  9. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Nuclear Medicine? Nuclear medicine is a branch of medical imaging that uses small amounts of radioactive material to ... a radiologist or other physician. To locate a medical imaging or radiation oncology provider in your community, you ...

  10. Nuclear fear revisited

    Science.gov (United States)

    Crease, Robert P.

    2010-10-01

    In 1988 the science historian Spencer Weart published a groundbreaking book called Nuclear Fear: A History of Images, which examined visions of radiation damage and nuclear disaster in newspapers, television, film, literature, advertisements and popular culture.

  11. Triangle Universities Nuclear Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    1991-01-01

    This report contains brief papers that discusses the following topics: Fundamental Symmetries in the Nucleus; Internucleon Interactions; Dynamics of Very Light Nuclei; Facets of the Nuclear Many-Body Problem; and Nuclear Instruments and Methods.

  12. Theory of nuclear matter

    Energy Technology Data Exchange (ETDEWEB)

    Avakyan, R.M.; Sarkisyan, A.V.

    1987-07-01

    The properties of degenerate stellar matter in the region of nuclear densities are considered. The threshold of the transition of the electron-nucleus phase to the state of continuous nuclear matter is found.

  13. RBC nuclear scan

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/003835.htm RBC nuclear scan To use the sharing features on this page, please enable JavaScript. An RBC nuclear scan uses small amounts of radioactive material to ...

  14. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Us News Physician Resources Professions Site Index A-Z Children's (Pediatric) Nuclear Medicine Children’s (pediatric) nuclear medicine ... physicians diagnose and evaluate medical conditions. These imaging scans use radioactive materials called radiopharmaceuticals or radiotracers . Depending ...

  15. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... its earliest stages as well as a patient’s immediate response to therapeutic interventions. Children's (pediatric) nuclear medicine ... leaving the nuclear medicine facility. Through the natural process of radioactive decay, the small amount of radiotracer ...

  16. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... Tell your doctor about your child’s recent illnesses, medical conditions, medications and allergies. Depending on the type ... Nuclear Medicine? Nuclear medicine is a branch of medical imaging that uses small amounts of radioactive material ...

  17. Nuclear disarmament verification

    Energy Technology Data Exchange (ETDEWEB)

    DeVolpi, A.

    1993-12-31

    Arms control treaties, unilateral actions, and cooperative activities -- reflecting the defusing of East-West tensions -- are causing nuclear weapons to be disarmed and dismantled worldwide. In order to provide for future reductions and to build confidence in the permanency of this disarmament, verification procedures and technologies would play an important role. This paper outlines arms-control objectives, treaty organization, and actions that could be undertaken. For the purposes of this Workshop on Verification, nuclear disarmament has been divided into five topical subareas: Converting nuclear-weapons production complexes, Eliminating and monitoring nuclear-weapons delivery systems, Disabling and destroying nuclear warheads, Demilitarizing or non-military utilization of special nuclear materials, and Inhibiting nuclear arms in non-nuclear-weapons states. This paper concludes with an overview of potential methods for verification.

  18. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... of page What are some common uses of the procedure? Children's (pediatric) nuclear medicine imaging is performed ... the thyroid gland. top of page How does the nuclear medicine procedure work? With ordinary x-ray ...

  19. Nuclear air cushion vehicles.

    Science.gov (United States)

    Anderson, J. L.

    1973-01-01

    This paper serves several functions. It identifies the 'state-of-the-art' of the still-conceptual nuclear air cushion vehicle, particularly the nuclear powerplant. Using mission studies and cost estimates, the report describes some of the advantages of nuclear power for large air cushion vehicles. The paper also summarizes the technology studies on mobile nuclear powerplants and conceptual ACV systems/missions studies that have been performed at NASA Lewis Research Center.

  20. A gênese da bomba

    Directory of Open Access Journals (Sweden)

    Joaquim Francisco de Carvalho

    2015-08-01

    Full Text Available O artigo traz à memória o desenvolvimento da física no século XX e relembra os cientistas que, direta ou indiretamente, na Europa e nos Estados Unidos, deram as suas contribuições para os programas nucleares de objetivos militares, que culminaram com as bombas de urânio e de plutônio que causaram a morte de centenas de milhares de pessoas inocentes, no Japão.

  1. O voo da águia

    OpenAIRE

    Botas, Philippe; Miranda, Paula; Pereira, Carolina,; Santiago, Luiz Miguel

    2013-01-01

    Enquadramento: A cervicalgia é um motivo de consulta muito frequente em Cuidados de Saúde Primários. O Médico de Família deve saber que a sua etiologia não se limita a patologia muscular ou degenerativa da coluna cervical. Justificação: Divulgação de entidade nosológica rara que pode motivar cervicalgia. Descrição de Caso: Homem de 36 anos, inspetor administrativo, pertencente a uma família nuclear na fase IV do ciclo de Duvall, de classe média. Antecedentes pessoais de amigdalectomia. ...

  2. GERONTOLOGIA: ESTADO DA ARTE

    Directory of Open Access Journals (Sweden)

    Vera M.A.Tordino Brandão

    2010-02-01

    Full Text Available O Programa de Gerontologia da PUC desenvolve pesquisas focando o ser na perspectiva do envelhecimento. As atividades são interdisciplinares e reúnem docentes, alunos e ex-alunos. Nesta mesa redonda apresentamos um panorama sobre estes estudos. Na área da educação e comunicação o foco está centrado na longevidade e na preparação e representação social da velhice. São ressaltadas como temáticas: a formação continuada de profissionais e pesquisadores; o significado da religiosidade/espiritualidade ao longo da trajetória, e sua repercussão na qualidade de vida do idoso; os programas sócio-educacionais para idosos e concepções sobre educação; o monitoramento da mídia na cobertura da crescente longevidade e seus impactos. Em identidade e modos de morar reflete-se sobre soluções planejadas e sua adequação para a inclusão do envelhecimento populacional como questão fundamental, que implica a elaboração de novas políticas, investigações e, especialmente, apresenta-se como questão a ser analisada, refletida e vivenciada pela sociedade em geral. Quanto à saúde, o Programa desenvolve várias pesquisas numa abordagem interdisciplinar tendo como objetos de estudo: a terapia assistida com animais direcionada a idosos com diagnóstico de Alzheimer; o acompanhamento terapêutico e o atendimento psicoterapêutico em grupo, a aplicação da técnica de Calatonia em idosos moradores de ILPI, além da investigação sobre impasses clínicos no idoso frágil. Palavras-chave: gerontologia, longevidade, envelhecimento

  3. Generalized Nuclear Data

    Energy Technology Data Exchange (ETDEWEB)

    2017-03-15

    This software is code related to reading/writing/manipulating nuclear data in the Generalized Nuclear Data (GND) format, a new format for sharing nuclear data among institutions. In addition to the software and its documentation, notes and documentation from the WPEC Subgroup 43 will be included. WPEC Subgroup 43 is an international committee charged with creating the API for the GND format.

  4. Nuclear fact book

    Energy Technology Data Exchange (ETDEWEB)

    Hill, O. F.; Platt, A. M.; Robinson, J. V. [comps

    1983-05-01

    This reference provides significant highlights and summary facts in the following areas: general energy; nuclear energy; nuclear fuel cycle; uranium supply and enrichment; nuclear reactors; spent fuel and advanced repacking concepts; reprocessing; high-level waste; gaseous waste; transuranic waste; low-level waste; remedial action; transportation; disposal; radiation information; environment; legislation; socio-political aspects; conversion factors; and a glossary. (GHT)

  5. Basic Nuclear Physics.

    Science.gov (United States)

    Bureau of Naval Personnel, Washington, DC.

    Basic concepts of nuclear structures, radiation, nuclear reactions, and health physics are presented in this text, prepared for naval officers. Applications to the area of nuclear power are described in connection with pressurized water reactors, experimental boiling water reactors, homogeneous reactor experiments, and experimental breeder…

  6. Nuclear Power in China

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    China’s vigorous efforts to propel development of nuclear power are paying off as the country’s nuclear power sector advances at an amazing pace. At present, China has set up three enormous nuclear power bases, one each in Qinshan of Zhejiang Province, Dayawan of Guangdong

  7. RETHINKING NUCLEAR POWER SAFETY

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The Fukushima nuclear accident sounds alarm bells in China’s nuclear power industry In the wake of the Fukushima nucleara ccident caused by the earthquake andt sunami in Japan,the safety of nuclearp ower plants and the development of nuclear power have raised concerns,

  8. Revitalizing Nuclear Safety Research.

    Science.gov (United States)

    National Academy of Sciences - National Research Council, Washington, DC.

    This report covers the general issues involved in nuclear safety research and points out the areas needing detailed consideration. Topics included are: (1) "Principles of Nuclear Safety Research" (examining who should fund, who should conduct, and who should set the agenda for nuclear safety research); (2) "Elements of a Future…

  9. Nuclear energy technology

    Science.gov (United States)

    Buden, David

    1992-01-01

    An overview of space nuclear energy technologies is presented. The development and characteristics of radioisotope thermoelectric generators (RTG's) and space nuclear power reactors are discussed. In addition, the policy and issues related to public safety and the use of nuclear power sources in space are addressed.

  10. Relation between nuclear envelope and nuclear lamina in nuclear assembly in vitro

    Institute of Scientific and Technical Information of China (English)

    蔡树涛; 翟中和

    1997-01-01

    Xenopus laevis egg extracts cell-free nuclear assembly system was used as an experimental model to study the process of nuclear lamina assembly in nuclear reconstitution in vitro. The experimental results showed that lamin was involved in the nuclear assembly in vitro. The assembly of nuclear lamina was preceded by the assembly of nuclear matrix, and probably, inner nuclear matrix assembly provided the basis for nuclear lamina assembly. Inhibition of normal assembly of nuclear lamina, by preincubating egg extracts cell-free system with anti-lamin antibodies, resulted in abnormal assembly of nuclear envelope, suggesting that nuclear envelope assembly is closely associated with nuclear lamina assembly.

  11. CONDICIONANTES DA COMPETITIVIDADE EMPRESARIAL

    Directory of Open Access Journals (Sweden)

    José Luiz Contador

    2010-03-01

    Full Text Available Este trabalho examina teoricamente os fatores determinantes da competitividade do produto e do negócio, imprescindíveis à elaboração de estratégias competitivas que visam à obtenção e sustentação de vantagens competitivas. Esse tema é objeto tanto da área de marketing estratégico quanto da de estratégia empresarial. Nas duas áreas, há um ponto de consenso que afirma que a empresa deve diferenciar sua oferta para conquistar e manter vantagem competitiva. Mas, os estudos conduzidos por meio do modelo de Campos e Armas da Competição revelaram que a empresa pode diferenciar seu produto e/ou serviço de modo mais amplo, levando em consideração, na formulação da sua estratégia competitiva, também o campo da competição, quer do produto, quer dela própria. Assim, o objetivo deste artigo é evidenciar que, para a empresa ser competitiva, além de diferenciar seu produto e/ou seu serviço no sentido tradicional, ela precisa: 1 diferenciar seu produto incluindo a definição em quais campos vai competir em cada segmento; e 2 escolher as armas da competição que irá utilizar e definir a intensidade de cada arma. Para atingir tal objetivo, foram necessários vários conceitos do modelo de Campos e Armas da Competição: campo da competição, arma da competição, tese do modelo, configuração dos campos da competição, campo coadjuvante, produto coadjuvante e par produto-mercado. Como uma proposta inovadora sempre desperta dúvida, é mostrado o processo de validação do modelo de Campos e Armas da Competição e são discutidas sua universalidade, consistência e completude.

  12. Activities report in nuclear physics

    NARCIS (Netherlands)

    Jansen, J. F. W.; Scholten, O.

    1987-01-01

    Experimental studies of giant resonances, nuclear structure, light mass systems, and heavy mass systems are summarized. Theoretical studies of nuclear structure, and dynamics are described. Electroweak interactions; atomic and surface physics; applied nuclear physics; and nuclear medicine are discus

  13. Nuclear reactor physics

    CERN Document Server

    Stacey, Weston M

    2010-01-01

    Nuclear reactor physics is the core discipline of nuclear engineering. Nuclear reactors now account for a significant portion of the electrical power generated worldwide, and new power reactors with improved fuel cycles are being developed. At the same time, the past few decades have seen an ever-increasing number of industrial, medical, military, and research applications for nuclear reactors. The second edition of this successful comprehensive textbook and reference on basic and advanced nuclear reactor physics has been completely updated, revised and enlarged to include the latest developme

  14. Nuclear Egress of Herpesviruses

    Institute of Scientific and Technical Information of China (English)

    Richard J.Roller

    2008-01-01

    Herpesviruses assemble and fill their capsids in the infected cell nucleus,and must then move this enormous macromolecular assembly across the nuclear membrane and into the cytoplasm.Doing so is a complex,multi-step process that involves envelopment of the capsid at the inner nuclear membrane and de-envelopment by fusion with the outer nuclear membrane.This process is orchestrated by viral proteins,but requires the modification of cellular structures and mechanisms including the nuclear lamina.In this review I summarize recent research on the mechanism of nuclear envelopment and the viral and cellular systems involved in its execution.

  15. Nuclear parton distributions

    Directory of Open Access Journals (Sweden)

    Kulagin S. A.

    2017-01-01

    Full Text Available We review a microscopic model of the nuclear parton distribution functions, which accounts for a number of nuclear effects including Fermi motion and nuclear binding, nuclear meson-exchange currents, off-shell corrections to bound nucleon distributions and nuclear shadowing. We also discuss applications of this model to a number of processes including lepton-nucleus deep inelastic scattering, proton-nucleus Drell-Yan lepton pair production at Fermilab, as well as W± and Z0 boson production in proton-lead collisions at the LHC.

  16. Nuclear energy; Le nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This digest document was written by members of the union of associations of ex-members and retired people of the Areva group (UARGA). It gives a comprehensive overview of the nuclear industry world, starting from radioactivity and its applications, and going on with the fuel cycle (front-end, back-end, fuel reprocessing, transports), the nuclear reactors (PWR, BWR, Candu, HTR, generation 4 systems), the effluents from nuclear facilities, the nuclear wastes (processing, disposal), and the management and safety of nuclear activities. (J.S.)

  17. Nuclear education and training

    CERN Document Server

    2012-01-01

    The OECD Nuclear Energy Agency (NEA) first published in 2000 Nuclear Education and Training: Cause for Concern? , which highlighted significant issues in the availability of human resources for the nuclear industry. Ten years on, Nuclear Education and Training: From Concern to Capability considers what has changed in that time and finds that, while some countries have taken positive actions, in a number of others human resources could soon be facing serious challenges in coping with existing and potential new nuclear facilities. This is exacerbated by the increasing rate of retirement as the w

  18. Het Italiaanse voorzetsel da

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In een voorzetselstudie in het kader van Jackendoffs semantische theorie wordt het sterk polyseme Italiaanse voorzetsel da geanalyseerd als een verzameling deelbetekenissen waarbij de meeste door een of meer semantische regels afgeleid kunnen worden van de basisbetekenis ruimtelijke

  19. Het Italiaanse voorzetsel da

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In een voorzetselstudie in het kader van Jackendoffs semantische theorie wordt het sterk polyseme Italiaanse voorzetsel da geanalyseerd als een verzameling deelbetekenissen waarbij de meeste door een of meer semantische regels afgeleid kunnen worden van de basisbetekenis ruimtelijke He

  20. ESPECTROS INFRAVERMELHOS DA CREATINA

    Directory of Open Access Journals (Sweden)

    Kumiko K. Sakane

    2011-08-01

    Full Text Available São apresentados espectros infravermelhos da creatina, na faixa de 4000 a 400 cm−1. Os resultados são comparados com espectros observados e calculados, publicados na literatura.

  1. History of Nuclear India

    Science.gov (United States)

    Chaturvedi, Ram

    2000-04-01

    India emerged as a free and democratic country in 1947, and entered into the nuclear age in 1948 by establishing the Atomic Energy Commission (AEC), with Homi Bhabha as the chairman. Later on the Department of Atomic Energy (DAE) was created under the Office of the Prime Minister Jawahar Lal Nehru. Initially the AEC and DAE received international cooperation, and by 1963 India had two research reactors and four nuclear power reactors. In spite of the humiliating defeat in the border war by China in 1962 and China's nuclear testing in 1964, India continued to adhere to the peaceful uses of nuclear energy. On May 18, 1974 India performed a 15 kt Peaceful Nuclear Explosion (PNE). The western powers considered it nuclear weapons proliferation and cut off all financial and technical help, even for the production of nuclear power. However, India used existing infrastructure to build nuclear power reactors and exploded both fission and fusion devices on May 11 and 13, 1998. The international community viewed the later activity as a serious road block for the Non-Proliferation Treaty and the Comprehensive Test Ban Treaty; both deemed essential to stop the spread of nuclear weapons. India considers these treaties favoring nuclear states and is prepared to sign if genuine nuclear disarmament is included as an integral part of these treaties.

  2. The nuclear symmetry energy

    Science.gov (United States)

    Baldo, M.; Burgio, G. F.

    2016-11-01

    The nuclear symmetry energy characterizes the variation of the binding energy as the neutron to proton ratio of a nuclear system is varied. This is one of the most important features of nuclear physics in general, since it is just related to the two component nature of the nuclear systems. As such it is one of the most relevant physical parameters that affect the physics of many phenomena and nuclear processes. This review paper presents a survey of the role and relevance of the nuclear symmetry energy in different fields of research and of the accuracy of its determination from the phenomenology and from the microscopic many-body theory. In recent years, a great interest was devoted not only to the Nuclear Matter symmetry energy at saturation density but also to its whole density dependence, which is an essential ingredient for our understanding of many phenomena. We analyze the nuclear symmetry energy in different realms of nuclear physics and astrophysics. In particular we consider the nuclear symmetry energy in relation to nuclear structure, astrophysics of Neutron Stars and supernovae, and heavy ion collision experiments, trying to elucidate the connections of these different fields on the basis of the symmetry energy peculiarities. The interplay between experimental and observational data and theoretical developments is stressed. The expected future developments and improvements are schematically addressed, together with most demanded experimental and theoretical advances for the next few years.

  3. Dynamic nuclear spin polarization

    Energy Technology Data Exchange (ETDEWEB)

    Stuhrmann, H.B. [GKSS-Forschungszentrum Geesthacht GmbH (Germany)

    1996-11-01

    Polarized neutron scattering from dynamic polarized targets has been applied to various hydrogenous materials at different laboratories. In situ structures of macromolecular components have been determined by nuclear spin contrast variation with an unprecedented precision. The experiments of selective nuclear spin depolarisation not only opened a new dimension to structural studies but also revealed phenomena related to propagation of nuclear spin polarization and the interplay of nuclear polarisation with the electronic spin system. The observation of electron spin label dependent nuclear spin polarisation domains by NMR and polarized neutron scattering opens a way to generalize the method of nuclear spin contrast variation and most importantly it avoids precontrasting by specific deuteration. It also likely might tell us more about the mechanism of dynamic nuclear spin polarisation. (author) 4 figs., refs.

  4. Overview of nuclear data

    Energy Technology Data Exchange (ETDEWEB)

    Firestone, R.B.

    2003-06-30

    For many years, nuclear structure and decay data have been compiled and disseminated by an International Network of Nuclear Structure and Decay Data (NSDD) evaluators under the auspices of the International Nuclear Data Committee (INDC) of the International Atomic Energy Agency (IAEA). In this lecture I will discuss the kinds of data that are available and describe various ways to obtain this information. We will learn about some of the publications that are available and Internet sources of nuclear data. You will be introduced to Isotope Explorer software for retrieving and displaying nuclear structure and radioactive decay data. The on-line resources Table of Radioactive Isotopes, PGAA Database Viewer, Nuclear Science Reference Search, Table of Isotopes Educational Website, and other information sources will be discussed. Exercises will be provided to increase your ability to understand, access, and use nuclear data.

  5. Cold nuclear fusion

    Directory of Open Access Journals (Sweden)

    Huang Zhenqiang Huang Yuxiang

    2013-10-01

    Full Text Available In normal temperature condition, the nuclear force constraint inertial guidance method, realize the combination of deuterium and tritium, helium and lithium... And with a magnetic moment of light nuclei controlled cold nuclear collide fusion, belongs to the nuclear energy research and development in the field of applied technology "cold nuclear collide fusion". According to the similarity of the nuclear force constraint inertial guidance system, the different velocity and energy of the ion beam mixing control, developed ion speed dc transformer, it is cold nuclear fusion collide, issue of motivation and the nuclear power plant start-up fusion and power transfer system of the important equipment, so the merger to apply for a patent

  6. Impacto ambiental da apicultura

    OpenAIRE

    1999-01-01

    A cultura da abelha doméstica Apis. mellifera L. ou apicultura é conhecida desde a antiguidade, sendo o mel uni alimento natural corrente entre os povos primitivos. Pinturas rupestres mostram que desde o neolítico o homem era atraído pelo mel, pois tentava recolher ninhos de abelhas selvagens e instalava-os em cavidades naturais das rochas, muito perto da sua habitação.

  7. The Nuclear Symmetry Energy

    CERN Document Server

    Baldo, M

    2016-01-01

    The nuclear symmetry energy characterizes the variation of the binding energy as the neutron to proton ratio of a nuclear system is varied. This is one of the most important features of nuclear physics in general, since it is just related to the two component nature of the nuclear systems. As such it is one of the most relevant physical parameters that affect the physics of many phenomena and nuclear processes. This review paper presents a survey of the role and relevance of the nuclear symmetry energy in different fields of research and of the accuracy of its determination from the phenomenology and from the microscopic many-body theory. In recent years, a great interest was devoted not only to the Nuclear Matter symmetry energy at saturation density but also to its whole density dependence, which is an essential ingredient for our understanding of many phenomena. We analyze the nuclear symmetry energy in different realms of nuclear physics and astrophysics. In particular we consider the nuclear symmetry ene...

  8. Nuclear energy efficiency improvements

    Energy Technology Data Exchange (ETDEWEB)

    Lauritzen, B.; Nonboel, E. [Technical Univ. of Denmark. DTU Nutech, Roskilde (Denmark); Kyrki-Rajamaeki, R. [Lappeenranta Univ. of Technology (Finland)

    2012-11-15

    Nuclear energy already today plays an important role in decarbonisation of the electricity sector while providing energy security and being economically competitive. Nuclear energy is characterized by its very high energy density and is well suited for large-scale, baseload electricity supply. Similar to renewable energy sources such as wind, solar or biomass, nuclear power is characterized by an abundant supply of its primary energy source, uranium, but is not limited to the same extent as these renewable energy sources from being an intermittent energy supply or imposing severe restrictions on land-use. Improving energy efficiency of nuclear power plants has contributed to a better utilization of the uranium resources and has helped improving the economic performance of nuclear power plants. This is to a large degree accomplished through optimisation of nuclear fuel assemblies as well as renewing turbines and generators. More importantly however, the overall economy of nuclear power has improved though better plant management leading to higher capacity factors and by extending the lifetimes of existing nuclear power plants. Provided that improved safety, economics and successful waste management can be demonstrated nuclear power is likely to grow in the future. Non-electricity applications may further boost the growth of nuclear energy, especially with the development of new reactor systems allowing for cogeneration of electricity and hydrogen or biofuels for transport. (Author)

  9. Nuclear energy - some aspects; Energia nuclear - alguns aspectos

    Energy Technology Data Exchange (ETDEWEB)

    Bandeira, Fausto de Paula Menezes

    2005-05-15

    This work presents a brief history of research and development concerning to nuclear technology worldwide and in Brazil, also information about radiations and radioactive elements as well; the nuclear technology applications; nuclear reactor types and functioning of thermonuclear power plants; the number of existing nuclear power plants; the nuclear hazards occurred; the national fiscalization of nuclear sector; the Brazilian legislation in effect and the propositions under proceduring at House of Representatives related to the nuclear energy.

  10. Nuclear Threats and Security

    Directory of Open Access Journals (Sweden)

    Garry Jacobs

    2012-10-01

    Full Text Available This article presents highlights and insights from the International Conference on “Nuclear Threats and Security” organized by the World Academy of Art and Science in association with the European Leadership Network and the Dag Hammarskjöld University College of International Relations and Diplomacy and sponsored by NATO at the Inter-University Centre, Dubrovnik on September 14-16, 2012. The conference examined important issues related to nuclear non-proliferation and disarmament, the legality of nuclear weapons and their use, illicit trade in nuclear materials, the dangers of nuclear terrorism, nuclear- and cyber-security. Papers and video recordings of the major presentations and session summaries can be found here.

  11. Safety and nuclear power

    Energy Technology Data Exchange (ETDEWEB)

    Gittus, John; Gunning, Angela.

    1988-05-01

    Representatives of the supporters and opponents of civil nuclear power put forward the arguments they feel the public should consider when making up their mind about the nuclear industry. The main argument in favour of nuclear power is about the low risk in comparison with other risks and the amount of radiation received on average by the population in the United Kingdom from different sources. The aim is to show that the nuclear industry is fully committed to the cause of safety and this has resulted in a healthy workforce and a safe environment for the public. The arguments against are that the nuclear industry is deceitful, secretive and politically motivated and thus its arguments about safety, risks, etc, cannot be trusted. The question of safety is considered further - in particular the perceptions, definitions and responsibility. The economic case for nuclear electricity is not accepted. (U.K.).

  12. Nuclear power industry

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-04-28

    This press dossier presented in Shanghai (China) in April 1999, describes first the activities of the Framatome group in the people`s republic of China with a short presentation of the Daya Bay power plant and of the future Ling Ao project, and with a description of the technological cooperation with China in the nuclear domain (technology transfers, nuclear fuels) and in other industrial domains (mechanics, oil and gas, connectors, food and agriculture, paper industry etc..). The general activities of the Framatome group in the domain of energy (nuclear realizations in France, EPR project, export activities, nuclear services, nuclear fuels, nuclear equipments, industrial equipments) and of connectors engineering are presented in a second and third part with the 1998 performances. (J.S.)

  13. Em defesa da semiodiversidade

    Directory of Open Access Journals (Sweden)

    Antônio Risério

    2008-11-01

    Full Text Available Semiodiversidade é um conceito que denomina a esfera da vida que se refere particularmente ao reino dos signos. Embora tenha sido criado no contexto das discussões sobre a biodiversidade, ele compreende um amplo campo que é quase desconhecido. Contrariamente à biodiversidade, não é um termo da moda, ainda que abarque um amploconjunto de problemas. As mais diferentes linguagens, signos e códigos culturais encontram lugar no domí­nio da semiodiversidade. Neste artigo a defesa da semiodiversidade é uma forma de preservar a vida humana neste momento da aventura do homem no planeta.Abstract: Semiodiversity is a concept to denominate the sphere of life that refers, particularly, to the realm of signs. Although it has been created in the context of biodiversity, it assigns a wider territory, which is almost unknown. Contrary to biodiversity, it is not a trendy' term, even though embeding a much wider scope. The most different languages, signs and cultural codes can be found in the domain of semiodiversity. In this article, the defense of semiodiversity is a way to preserve human life at this moment of humanadventure on Earth.

  14. Nuclear Power Feasibility 2007

    OpenAIRE

    Aragonés Beltrán, José María; Hill, Barrie Frederick; Kadak, Andrew C.; Shultz, Donald F.; Spitalnik, Jorge

    2008-01-01

    Nuclear power is a proven technology and has the potential to generate virtually limitless energy with no significant greenhouse gas emissions. Nuclear power can become one of the main options to contribute to substantial cuts in global greenhouse gas emissions. Modern development of nuclear power technology and the established framework of international agreements and conventions are responding to the major political, economic and environmental issues -high capital costs, the risks posed by ...

  15. Absolute nuclear material assay

    Science.gov (United States)

    Prasad, Manoj K [Pleasanton, CA; Snyderman, Neal J [Berkeley, CA; Rowland, Mark S [Alamo, CA

    2012-05-15

    A method of absolute nuclear material assay of an unknown source comprising counting neutrons from the unknown source and providing an absolute nuclear material assay utilizing a model to optimally compare to the measured count distributions. In one embodiment, the step of providing an absolute nuclear material assay comprises utilizing a random sampling of analytically computed fission chain distributions to generate a continuous time-evolving sequence of event-counts by spreading the fission chain distribution in time.

  16. Nuclear spirals in galaxies

    OpenAIRE

    Maciejewski, Witold

    2006-01-01

    Recent high-resolution observations indicate that nuclear spirals are often present in the innermost few hundred parsecs of disc galaxies. My models show that nuclear spirals form naturally as a gas response to non-axisymmetry in the gravitational potential. Some nuclear spirals take the form of spiral shocks, resulting in streaming motions in the gas, and in inflow comparable to the accretion rates needed to power local Active Galactic Nuclei. Recently streaming motions of amplitude expected...

  17. Nonstrategic Nuclear Weapons

    Science.gov (United States)

    2014-01-03

    William Potter , and Nikolai Sokov, Reducing and Regulating Tactical (Nonstrategic) Nuclear Weapons in Europe, The James Martin Center For...See William C. Potter and Nikolai Sokov, “Nuclear Weapons that People Forget,” International Herald Tribune, May 31, 2000. 87 Sam Nunn, Igor...their security.97 94 Kent Harris , “NATO Allies Want U.S. Nuclear Weapons out of Europe

  18. Nuclear Fabrication Consortium

    Energy Technology Data Exchange (ETDEWEB)

    Levesque, Stephen [EWI, Columbus, OH (United States)

    2013-04-05

    This report summarizes the activities undertaken by EWI while under contract from the Department of Energy (DOE) Office of Nuclear Energy (NE) for the management and operation of the Nuclear Fabrication Consortium (NFC). The NFC was established by EWI to independently develop, evaluate, and deploy fabrication approaches and data that support the re-establishment of the U.S. nuclear industry: ensuring that the supply chain will be competitive on a global stage, enabling more cost-effective and reliable nuclear power in a carbon constrained environment. The NFC provided a forum for member original equipment manufactures (OEM), fabricators, manufacturers, and materials suppliers to effectively engage with each other and rebuild the capacity of this supply chain by : Identifying and removing impediments to the implementation of new construction and fabrication techniques and approaches for nuclear equipment, including system components and nuclear plants. Providing and facilitating detailed scientific-based studies on new approaches and technologies that will have positive impacts on the cost of building of nuclear plants. Analyzing and disseminating information about future nuclear fabrication technologies and how they could impact the North American and the International Nuclear Marketplace. Facilitating dialog and initiate alignment among fabricators, owners, trade associations, and government agencies. Supporting industry in helping to create a larger qualified nuclear supplier network. Acting as an unbiased technology resource to evaluate, develop, and demonstrate new manufacturing technologies. Creating welder and inspector training programs to help enable the necessary workforce for the upcoming construction work. Serving as a focal point for technology, policy, and politically interested parties to share ideas and concepts associated with fabrication across the nuclear industry. The report the objectives and summaries of the Nuclear Fabrication Consortium

  19. Nuclear South Asia

    Science.gov (United States)

    2007-11-02

    nuclear equation in South Asia, the geopolitical and geoeconomic realities will keep China out of the South Asian nuclear picture. As Pakistan...remain unipolar for quite some time with the United States as the global superpower. There is predominance of geoeconomics as against geopolitical...to drag China into the nuclear equation in South Asia, the geopolitical and geoeconomic realities will likely keep China out of the South Asian

  20. Facilitating Global Nuclear Disarmament

    Institute of Scientific and Technical Information of China (English)

    Wu; Junr

    2014-01-01

    <正>I.Introduction Since the advent of nuclear weapons,especially after the United States dropped atomic bombs in Hiroshima and Nagasaki,the capacity of massive and indiscriminate annihilation of nuclear weapons have made people of insight across the world realize that such weapons cannot be used arbitrarily.In the 1960s,the then Chinese leader Mao Zedong said that to throw them(nuclear weapons)about at will is committing a

  1. Nuclear electronic instrumentation; Instrumentacion electronica nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez J, F. J., E-mail: francisco.ramirez@inin.gob.m [ININ, Departamento de Sistemas Electronicos, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2010-07-01

    The activities carried out in the Instituto Nacional de Investigaciones Nucleares (ININ) in the field of the nuclear electronic instrumentation included those activities corresponding to the design and production of nuclear instruments in a first stage, as well as the internal activities of design, repair and maintenance that have supported to other projects of the institution during many years. It is mentioned of the presence and constant collaboration of the ININ with the IAEA in different projects and programs. Also, it is mentioned on the establishment of the Radiation Detectors Laboratory, which for their characteristics and repair capacities of radiation detectors of cooled semiconductor, it is only in their specialty. It is emphasized the investigation and the development in the field of new radiation detectors and applications, as well as the important contribution in this field, in institutions like: Mexican Petroleum, National Commission of Nuclear Safety and Safeguards and Federal Commission of Electricity. Finally a position of the future of these activities is made, considering the speed of the advances of the electronic and nuclear technology. (Author)

  2. Anhembi magazine and nuclear energy

    Energy Technology Data Exchange (ETDEWEB)

    Duran, Gustavo Barrientos [Universidade de Sao Paulo (USP), SP (Brazil). Escola de Comunicacoes e Artes. Dept. de Jornalismo e Editoracao], e-mail: ggustavo@usp.br; Gordon, Ana Maria P.L. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: amgordon@ipen.br

    2009-07-01

    From 1952 to 1962, a scientific and cultural periodic, named 'Revista Anhembi, was sold monthly. The magazine target was Brazilian and foreign schools and universities, his students and whoever was interested on culture, science, politics or signed articles. This publication purpose was to be the divulgation vehicle of new cultural and scientific ideas, most of them produced by Brazilian researchers, intellectuals and artists. Together with the cultural production of authors like Carlos Drummond de Andrade, the magazine also covered the major happenings from Brazil and the world. The editorials were signed by the magazine director - Paulo Duarte - one of the intellectuals with participation in the University of Sao Paulo foundation. Other researchers, already well-known at that time, such as Jose Reis, Florestan Fernandes and others, published in Anhembi, regularly. Their articles presented always a favorable content to democracy and the country development. What was out-of-date and its 'agents', the dictatorships, the corruption were open enemies of the magazine, which criticized governments, like for example, General Salazar's, in Portugal. The criticisms, sometimes contrary to the status quo, finally justified the circulation prohibition in some countries, like in Portugal, and also a diminishing of the advertising sponsorship Not only because of these problems, the increase in the paper cost made, in the long run, the publication of Anhembi impossible to continue. Meanwhile, the national nuclear policy and its defenders, like Alvaro Alberto da Motta e Silva, besides some other researchers, was not one of the routine issues covered by the magazine. Despite the magazine reported, in every new edition, a series of occurrences and claims - new universities and research centers foundation in the country, the struggle for funds, the national commissions asking for the full-time dedication regime for research, the nuclear issue focused, mainly

  3. Nuclear medicine physics

    CERN Document Server

    De Lima, Joao Jose

    2011-01-01

    Edited by a renowned international expert in the field, Nuclear Medicine Physics offers an up-to-date, state-of-the-art account of the physics behind the theoretical foundation and applications of nuclear medicine. It covers important physical aspects of the methods and instruments involved in modern nuclear medicine, along with related biological topics. The book first discusses the physics of and machines for producing radioisotopes suitable for use in conventional nuclear medicine and PET. After focusing on positron physics and the applications of positrons in medicine and biology, it descr

  4. Nuclear safety in perspective

    Directory of Open Access Journals (Sweden)

    J. K. Basson

    1983-03-01

    Full Text Available The impending operation of South Africa’s first nuclear power station, Koeberg, necessitates a thorough analysis of nuclear safety under local conditions. More is known, worldwide, about radiation effects than about any other health hazard, and international norms have already been accepted since 1928. The widespread use of X-rays and radio-isotopes, the extraction and processing of uranium, visits by nuclear-powered ships and, especially, the nuclear-reactor operation in South Africa. Consequently, the pre-operational investigations of Koeberg could be completed thoroughly, with full confidence in its safe commissioning.

  5. Nuclear level density predictions

    Directory of Open Access Journals (Sweden)

    Bucurescu Dorel

    2015-01-01

    Full Text Available Simple formulas depending only on nuclear masses were previously proposed for the parameters of the Back-Shifted Fermi Gas (BSFG model and of the Constant Temperature (CT model of the nuclear level density, respectively. They are now applied for the prediction of the level density parameters of all nuclei with available masses. Both masses from the new 2012 mass table and from different models are considered and the predictions are discussed in connection with nuclear regions most affected by shell corrections and nuclear structure effects and relevant for the nucleosynthesis.

  6. Nuclear power in Europe

    Energy Technology Data Exchange (ETDEWEB)

    Gittus, J. (British Nuclear Forum, London (UK))

    1991-04-01

    The 1990s are turning out to be a most crucial phase for the nuclear industries of Europe. A time of uncertainty, as well as considerable opportunity, lies ahead. Despite a measure of public and political opposition to nuclear power, many are beginning to realise that, as a method of generating electricity that produces only 1% of greenhouse gases compared to coal per unit of electricity, nuclear energy may be the best alternative to the burning of fossil fuels. Although advances have been made in renewable energy, nuclear power is still the main non-fossil fuel source that can cope with today's energy demands. (author).

  7. Nuclear medium effects in $\

    CERN Document Server

    Haider, H; Athar, M Sajjad; Vacas, M J Vicente

    2011-01-01

    We study the nuclear medium effects in the weak structure functions $F_2(x,Q^2)$ and $F_3(x,Q^2)$ in the deep inelastic neutrino/antineutrino reactions in nuclei. We use a theoretical model for the nuclear spectral functions which incorporates the conventional nuclear effects, such as Fermi motion, binding and nucleon correlations. We also consider the pion and rho meson cloud contributions calculated from a microscopic model for meson-nucleus self-energies. The calculations have been performed using relativistic nuclear spectral functions which include nucleon correlations. Our results are compared with the experimental data of NuTeV and CDHSW.

  8. Nuclear physics of stars

    CERN Document Server

    Iliadis, Christian

    2007-01-01

    Thermonuclear reactions in stars is a major topic in the field of nuclear astrophysics, and deals with the topics of how precisely stars generate their energy through nuclear reactions, and how these nuclear reactions create the elements the stars, planets and - ultimately - we humans consist of. The present book treats these topics in detail. It also presents the nuclear reaction and structure theory, thermonuclear reaction rate formalism and stellar nucleosynthesis. The topics are discussed in a coherent way, enabling the reader to grasp their interconnections intuitively. The book serves bo

  9. Nuclear criticality safety guide

    Energy Technology Data Exchange (ETDEWEB)

    Pruvost, N.L.; Paxton, H.C. [eds.

    1996-09-01

    This technical reference document cites information related to nuclear criticality safety principles, experience, and practice. The document also provides general guidance for criticality safety personnel and regulators.

  10. Nuclear structure theory

    CERN Document Server

    Irvine, J M

    1972-01-01

    Nuclear Structure Theory provides a guide to nuclear structure theory. The book is comprised of 23 chapters that are organized into four parts; each part covers an aspect of nuclear structure theory. In the first part, the text discusses the experimentally observed phenomena, which nuclear structure theories need to look into and detail the information that supports those theories. The second part of the book deals with the phenomenological nucleon-nucleon potentials derived from phase shift analysis of nucleon-nucleon scattering. Part III talks about the phenomenological parameters used to de

  11. Technologists for Nuclear Medicine

    Science.gov (United States)

    Barnett, Huey D.

    1974-01-01

    Physicians need support personnel for work with radioisotopes in diagnosing dangerous diseases. The Nuclear Medicine Technology (NMT) Program at Hillsborough Community College in Tampa, Florida, is described. (MW)

  12. da etiologia ao tratamento

    OpenAIRE

    Soares, Tânia Alexandra Maia

    2013-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária A luxação da articulação temporomandibular (ATM) ocorre quando o côndilo mandibular se desloca para fora da fossa mandibular e não é capaz de retornar. As manifestações clinicas mais frequentes desta patologia são: dificuldade de fechar a boca, depressão pré-auricular, sialorréia, tensão dos músculos da mastigação e dor severa na reg...

  13. Fundamentos da psicologia social

    OpenAIRE

    Kruger, Helmuth Ricardo

    1984-01-01

    O tema central deste estudo é o dos fundamentos da Psicologia Social. Neste sentido, foram examinados pressupostos ontológicos, epistemológicos, lógicos e axiológicos mas, também, as bases conceituais, teóricas e metodológicas deste setor da Psicologia contemporânea. A justificar este empreendimento, encontram-se duas suposições: a de que qualquer ciência é inexoravelmente construída sobre postulados metafísicos e lógicos, e a de que a falta de clareza em relação a estes impede a instalação d...

  14. DA LITERATURA AO PENSAMENTO

    Directory of Open Access Journals (Sweden)

    Gustavo Bernardo

    2012-07-01

    Full Text Available Apresento uma concepção pessoal do ensino de literatura, condensando a discussão das principais questões que o afetam: a singularidade da disciplina entre as demais disciplinas escolares; a crítica do realismo como valor dominante; a importância do exemplo; os efeitos da desvalorização salarial e moral do professor; a praga das adaptações literárias para jovens. A partir dessas questões, apresento cinco modos de leitura e ensino do texto literário, a saber: ler como resposta; ler como pergunta; a leitura ingênua; a leitura crítica; a leitura teórica. Concluo pela necessidade de proteção radical à dúvida, fundadora da literatura e do próprio pensamento.

  15. Medidas de rentabilidade da empresa

    OpenAIRE

    Mota, Haroldo Moura Vale

    2010-01-01

    Faz uma avaliação da medida de retorno contábil da corporação (return on investment - ROI) à luz da verdadeira medida de retorno econômico (taxa interna de retorno - TIR). Apresenta modelo para cálculo da taxa interna de retorno da empresa, o qual é submetido à testes para aferir o seu valor informativo. Utilizando o conceito de taxa interna de retorno da corporação, é criado um modelo denominado de Modelo de Avaliação Econômica Base Caixa, aplicável a uma empresa b...

  16. Da Vinci Linjen

    DEFF Research Database (Denmark)

    Nissen, Poul

    Afsluttende evalueringsrapport fra følgeforskningen gennem tre år i forbindelse med dety pædagogiske arbejde på Blåbjerggårdskolens Da Vinci Linje for skolemotiverede og underpræsterende elever på 7. til 9. klassetrin.......Afsluttende evalueringsrapport fra følgeforskningen gennem tre år i forbindelse med dety pædagogiske arbejde på Blåbjerggårdskolens Da Vinci Linje for skolemotiverede og underpræsterende elever på 7. til 9. klassetrin....

  17. GESTAO DA AGRICULTURA URBANA

    OpenAIRE

    2014-01-01

    Este artigo apresenta o conceito de agricultura urbana e sua contribuição para a integração da atividade agrícola com o ambiente urbano, incentivando o desenvolvimento de cidades sustentáveis. Analisa o grau de complexidade encontrado pelas autoridades ao criar e aplicar politicas pública onde os sistemas urbanos de suprimento de alimentos não são acessíveis a toda a população. Traz luz a algumas das questões diretamente relacionadas à implantação da agricultura em grandes centros urbanos, ta...

  18. Commercial nuclear power 1990

    Energy Technology Data Exchange (ETDEWEB)

    1990-09-28

    This report presents the status at the end of 1989 and the outlook for commercial nuclear capacity and generation for all countries in the world with free market economies (FME). The report provides documentation of the US nuclear capacity and generation projections through 2030. The long-term projections of US nuclear capacity and generation are provided to the US Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM) for use in estimating nuclear waste fund revenues and to aid in planning the disposal of nuclear waste. These projections also support the Energy Information Administration's annual report, Domestic Uranium Mining and Milling Industry: Viability Assessment, and are provided to the Organization for Economic Cooperation and Development. The foreign nuclear capacity projections are used by the DOE uranium enrichment program in assessing potential markets for future enrichment contracts. The two major sections of this report discuss US and foreign commercial nuclear power. The US section (Chapters 2 and 3) deals with (1) the status of nuclear power as of the end of 1989; (2) projections of nuclear capacity and generation at 5-year intervals from 1990 through 2030; and (3) a discussion of institutional and technical issues that affect nuclear power. The nuclear capacity projections are discussed in terms of two projection periods: the intermediate term through 2010 and the long term through 2030. A No New Orders case is presented for each of the projection periods, as well as Lower Reference and Upper Reference cases. 5 figs., 30 tabs.

  19. Nuclear Manpower Training

    Energy Technology Data Exchange (ETDEWEB)

    Min, B. J.; Han, K. W.; Lee, H. Y. and others

    2006-01-15

    Through the project on nuclear human resources development in 2005, the Nuclear Training Center of KAERI has provided 67 nuclear education and training courses for 3,658 persons from the domestic nuclear related organizations such as Government Agencies, nuclear industries, R and D institutes, universities, and public as well as from IAEA Member States. In addition, 6 students (MS and Ph D.) have taken nuclear technology related courses offered by UST-KAERI. The project has developed 8 programs and 12 courses. They includes programs for IAEA training, bilateral education and training, and in-house training as well as courses dealing with maintenance of nuclear power plants and management of electricity generation, thermal-hydraulics nuclear hydrogen, nuclear safeguards, radiation emergency preparedness and etc. National and international cooperation has been promoted. For ANENT, test operation, data loading and revision of the web-portal have been undertaken. Also the web-portal operation system has been established. For FNCA, NTC has cooperated for the establishment of a model of human resource development and the exchange of information/materials. With WNU, the NTC has made an effort for hosting 2007 WNU Summer Institute. The infrastructure for nuclear education and training has been strengthened. Basic directions for providing the customers with better service, This includes showing kindness to the customer, renovation of the interior of training facilities, and upgrading of web-based management system for learning and using facilities of NTC. Other efforts have resulted in the publication of 25 course materials (10 for international courses and 15 for national courses), and the improvement of education and training equipment. The International Nuclear Training and Education Center (INTEC), which was opened in 2002, has hosted 296 international and domestic events in 2005.

  20. Early localization of NPA58, a rat nuclear pore-associated protein, to the reforming nuclear envelope during mitosis

    Indian Academy of Sciences (India)

    Radhika Ganeshan; Nandini Rangaraj; Veena K Parnaik

    2001-03-01

    We have studied the mitotic reassembly of the nuclear envelope, using antibodies to nuclear marker proteins and NPA58 in F-111 rat fibroblast cells. In earlier studies we have proposed that NPA58, a 58 kDa rat nuclear protein, is involved in nuclear protein import. In this report, NPA58 is shown to be localized on the cytoplasmic face of the envelope in interphase cells, in close association with nuclear pores. In mitotic cells NPA58 is dispersed in the cytoplasm till anaphase. The targeting of NPA58 to the reforming nuclear envelope in early telophase coincides with the recruitment of a well-characterized class of nuclear pore proteins recognized by the antibody mAb 414, and occurs prior to the incorporation of lamin B1 into the envelope. Significant protein import activity is detectable only after localization of NPA58 in the newly-formed envelope. The early targeting of NPA58 is consistent with its proposed role in nuclear transport.

  1. Migration of ATLAS PanDA to CERN

    Science.gov (United States)

    Stewart, Graeme Andrew; Klimentov, Alexei; Koblitz, Birger; Lamanna, Massimo; Maeno, Tadashi; Nevski, Pavel; Nowak, Marcin; Emanuel De Castro Faria Salgado, Pedro; Wenaus, Torre

    2010-04-01

    The ATLAS Production and Distributed Analysis System (PanDA) is a key component of the ATLAS distributed computing infrastructure. All ATLAS production jobs, and a substantial amount of user and group analysis jobs, pass through the PanDA system, which manages their execution on the grid. PanDA also plays a key role in production task definition and the data set replication request system. PanDA has recently been migrated from Brookhaven National Laboratory (BNL) to the European Organization for Nuclear Research (CERN), a process we describe here. We discuss how the new infrastructure for PanDA, which relies heavily on services provided by CERN IT, was introduced in order to make the service as reliable as possible and to allow it to be scaled to ATLAS's increasing need for distributed computing. The migration involved changing the backend database for PanDA from MySQL to Oracle, which impacted upon the database schemas. The process by which the client code was optimised for the new database backend is discussed. We describe the procedure by which the new database infrastructure was tested and commissioned for production use. Operations during the migration had to be planned carefully to minimise disruption to ongoing ATLAS offline computing. All parts of the migration were fully tested before commissioning the new infrastructure and the gradual migration of computing resources to the new system allowed any problems of scaling to be addressed.

  2. Development of data acquisition system for test circuit for the Thermo-Hydraulic Laboratory of CDTN; Desenvolvimento de sistema de aquisicao de dados para circuito de testes do Laboratorio de Termo-Hidraulica do CDTN

    Energy Technology Data Exchange (ETDEWEB)

    Corrade, Thales Jose Rodrigues; Mesquita, Amir Zacarias; Santos, Andre Augusto Campagnole dos, E-mail: thalescorrade@hotmail.com, E-mail: amir@cdtn.br, E-mail: aacs@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil). Servico de Tecnologia de Reatores

    2013-07-01

    The Circuit Water-Air (CWA), present in the Laboratorio de Termo-Hidraulica of the Centro de Desenvolvimento da Tecnologia Nuclear/Comissao Nacional de Energia Nuclear (CDTN / CNEN), has been used to evaluate devices present in nuclear fuel elements of a PWR (Pressurized Water Reactor). Currently, a segment of 5x5 beam simulators grids with spacer bars is being tested, serving one of the activities under the Project FUJB / FINEP / INB - 'Development of New Generation of Nuclear Fuel Element '. For the measurements of pressure drop along this beam, a system of data acquisition based on Basic language was created. Although this system is efficient and robust, their resources are very limited. Therefore, it was decided to use the software LabVIEW® implementing a more versatile and modern system. This article describes the new data acquisition system, and presents some results. The main parameters are monitored: temperature, density, dynamic viscosity, Reynolds number. The values of standard deviation, mean and uncertainty of an arbitrary channel are calculated. The system was installed and tested in the circuit under experimental conditions and showed satisfactory results.

  3. Profilaxia da peste

    Directory of Open Access Journals (Sweden)

    Renato dos Santos Araújo

    1967-12-01

    Full Text Available O autor parte da premissa de que a profilaxia da doença infecciosa decorre do encadeamento epidemiológico: fonte de infecção-veículo transmissor - receptivel, para explicar a da peste, baseada no mesmo princípio. Depois de citar os 4 principais complexos epidemiológicos da peste e afirmar que tôda a profilaxia da doença consiste em atingir os dois primeiros elos dessas cadeias e proteger o último, passa a classificar os vários métodos profiláticos empregados em 2 grandes grupos: o das medidas destrutivas ou provisórias e o das medidas supressivas ou definitivas. Entre as primeiras arrola a desratização e a despulização, às quais acrescenta o tratamento e isolamento do doente e do portaãor, e entre as segundas inclui a anti-ratização e a imunização. A seguir, passa a explicar em que consistem essas várias medidas profiláticas e quais os agentes de que se tem lançado mão para executá-las, expendendo ao curso dessa exposição o conceito que formula a respeito de cada uma delas, à guisa de apreciação do seu valor relativo. Enaltece sobretudo as medidas supressivas ou definitivas, às quais empresta a maior significação na luta antipestosa, chamando a atenção, em especial, para a necessidade de estudos imunológicos para aperfeiçoamento do poder imunitário das vacinas de germes vivos avirulentos, que considera um grande recurso para a profilaxia da doença, sobretudo para a proteção do rurícola, cujo labor e modo de vida o expõem inevitavelmente a se infectar, por ocasião da ocorrência de epizootias de origem silvestre. Concluída essa primeira parte, passa a fazer o histórico de como se desenvolveu a campanha contra a peste, no Brasil, desde a época da sua invasão em 1899 pelo pôrto de Santos até os nossos dias. Nesse histórico, detem-se um pouco para expôr a atuação do extinto Serviço Nacional de Peste, o qual, criado em 1941, após a reorganização do Departamento Nacional de Saúde, passou

  4. O agente de serviço social na fusão da Eletronuclear: discurso e ação

    OpenAIRE

    Vilchez de Rabanal, Sissiliana Behania Del Rochio

    2000-01-01

    Este estudo desvelou, através da abordagem hermenêutica fenomenológica, a polissemia do fenômeno da fusão da empresa pública Eletronuclear. Destaca-se o sentido técnico e humano do processo de fusão da área nuclear de Furnas e Nuclen. Descreve-se o vivido pelas pessoas, durante os momentos da fusão: antecipação, anúncio, transição e formação da nova Empresa. A compreensão da singularidade do caso enfocado, dependeu do discurso da ação do agente de Serviço Social da Eletronuclear. ...

  5. Gordon Conference on Nuclear Research

    Energy Technology Data Exchange (ETDEWEB)

    Austin, S.M.

    1983-09-01

    Session topics were: quarks and nuclear physics; anomalons and anti-protons; the independent particle structure of nuclei; relativistic descriptions of nuclear structure and scattering; nuclear structure at high excitation; advances in nuclear astrophysics; properties of nuclear material; the earliest moments of the universe; and pions and spin excitations in nuclei.

  6. Nuclear Energy and the Environment.

    Science.gov (United States)

    International Atomic Energy Agency, Vienna (Austria).

    "Nuclear Energy and the Environment" is a pocket folder of removable leaflets concerned with two major topics: Nuclear energy and Nuclear Techniques. Under Nuclear Energy, leaflets concerning the topics of "Radiation--A Fact of Life,""The Impact of a Fact: 1963 Test Ban Treaty,""Energy Needs and Nuclear Power,""Power Reactor Safety,""Transport,"…

  7. Clinical Nuclear Pharmacy Clerkship

    Science.gov (United States)

    Dunson, George L.; Christopherson, William J., Jr.

    1977-01-01

    The School of Pharmacy, University of the Pacific, and the Pharmacy Service, Letterman Army Medical Center, initiated a 15-week clinical nuclear pharmacy clerkship in 1975. It includes basic nuclear medical science, technical competency, professional competency, and special interest emphasis. (LBH)

  8. The nuclear age

    Energy Technology Data Exchange (ETDEWEB)

    Leclercq, J.

    1986-01-01

    This book is divided into 7 chapters bearing on: (1) Nuclear power: an historical perspective (2) Diversity of reactor designs (3) Safety and the environment (4) Architecture and heavy construction (5) Fabrication and installation (6) Nuclear fuel (7) Working for the electric power industry.

  9. Exotic nuclear matter

    Directory of Open Access Journals (Sweden)

    Lenske H.

    2016-01-01

    Full Text Available Recent developments of nuclear structure theory for exotic nuclei are addressed. The inclusion of hyperons and nucleon resonances is discussed. Nuclear multipole response functions, hyperon interactions in infinite matter and in neutron stars and theoretical aspects of excitations of nucleon resonances in nuclei are discussed.

  10. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... scan being performed, you will receive specific preparation instructions for what your child may eat and drink before the exam, especially ... Epilepsy Images related to Children's (Pediatric) Nuclear Medicine ... Videos related to Children's (Pediatric) Nuclear Medicine Sponsored by Please note RadiologyInfo. ...

  11. Battling Nuclear Proliferation

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    As the North Korean and Iranian nuclear issues develop and efforts to resolve them continue, global attention to anti-nuclear proliferation and the work of the International Atomic Energy Agency (IAEA) has become even more intense. Pang Sen, Chairman of

  12. Nuclear Power Plant Technician

    Science.gov (United States)

    Randall, George A.

    1975-01-01

    The author recognizes a body of basic knowledge in nuclear power plant technoogy that can be taught in school programs, and lists the various courses, aiming to fill the anticipated need for nuclear-trained manpower--persons holding an associate degree in engineering technology. (Author/BP)

  13. Nuclear Power Plants. Revised.

    Science.gov (United States)

    Lyerly, Ray L.; Mitchell, Walter, III

    This publication is one of a series of information booklets for the general public published by the United States Atomic Energy Commission. Among the topics discussed are: Why Use Nuclear Power?; From Atoms to Electricity; Reactor Types; Typical Plant Design Features; The Cost of Nuclear Power; Plants in the United States; Developments in Foreign…

  14. Nonstrategic Nuclear Weapons

    Science.gov (United States)

    2017-02-21

    have eased in recent years, with their nuclear tests in 1998 and continued animosity toward each other, India and Pakistan have joined the list of...could be complex, difficult, and very time- consuming . 137 Given the large disparity in the numbers of U.S. and Russian nonstrategic nuclear weapons

  15. (Nuclear theory: Annual report)

    Energy Technology Data Exchange (ETDEWEB)

    Iachello, F.; Alhassid, Y.; Kusnezov, D.

    1991-01-01

    This report discusses topics on : nuclear structure models; algebraic models of hadronic structure; nuclear reactions; hot rotating nuclei; chaos in nuclei; signatures of the quark-gluon plasma; hadronic spectroscopy; octupole collectivity in nuclei; finite-temperature methods for the many-body problem; and classical limit of algebraic hamiltonians. (LSP)

  16. [Nuclear theory: Annual report

    Energy Technology Data Exchange (ETDEWEB)

    Iachello, F.; Alhassid, Y.; Kusnezov, D.

    1991-12-31

    This report discusses topics on : nuclear structure models; algebraic models of hadronic structure; nuclear reactions; hot rotating nuclei; chaos in nuclei; signatures of the quark-gluon plasma; hadronic spectroscopy; octupole collectivity in nuclei; finite-temperature methods for the many-body problem; and classical limit of algebraic hamiltonians. (LSP)

  17. Vented nuclear fuel element

    Science.gov (United States)

    Grossman, Leonard N.; Kaznoff, Alexis I.

    1979-01-01

    A nuclear fuel cell for use in a thermionic nuclear reactor in which a small conduit extends from the outside surface of the emitter to the center of the fuel mass of the emitter body to permit escape of volatile and gaseous fission products collected in the center thereof by virtue of molecular migration of the gases to the hotter region of the fuel.

  18. Nuclear Power Plant Technician

    Science.gov (United States)

    Randall, George A.

    1975-01-01

    The author recognizes a body of basic knowledge in nuclear power plant technoogy that can be taught in school programs, and lists the various courses, aiming to fill the anticipated need for nuclear-trained manpower--persons holding an associate degree in engineering technology. (Author/BP)

  19. Industrialization of Nuclear Technology

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    1 Overview1.1 Income from operating activities Sale income from application of nuclear technology and non-nuclear products totaled 419million Yuan in 2015,an increase of 23.6%over the previous year,exceeding the target income set at the beginning of 2015.Of the total,sale incomes from iridium source,cobalt source,inspection system

  20. TRAINING NUCLEAR TECHNICIANS.

    Science.gov (United States)

    KOVNER, EDGAR A.

    PROBLEMS CONFRONTED BY PLANNERS OF NUCLEAR PROGRAMS AT THE TECHNICIAN LEVEL INCLUDE (1) LACK OF PRECEDENT IN CURRICULUM, COURSE OUTLINES, AND GRADUATE PLACEMENT, (2) DIFFICULTY IN DETERMINING COSTS OF LABORATORY CONSTRUCTION, EQUIPMENT, AND OPERATION, AND (3) REQUIREMENT OF ATOMIC ENERGY COMMISSION LICENSES IN NUCLEAR OCCUPATIONS. A 92-SEMESTER…

  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. Comprehensive nuclear materials

    CERN Document Server

    Allen, Todd; Stoller, Roger; Yamanaka, Shinsuke

    2012-01-01

    Comprehensive Nuclear Materials encapsulates a panorama of fundamental information on the vast variety of materials employed in the broad field of nuclear technology. The work addresses, in five volumes, 3,400 pages and over 120 chapter-length articles, the full panorama of historical and contemporary international research in nuclear materials, from Actinides to Zirconium alloys, from the worlds' leading scientists and engineers. It synthesizes the most pertinent research to support the selection, assessment, validation and engineering of materials in extreme nuclear environments. The work discusses the major classes of materials suitable for usage in nuclear fission, fusion reactors and high power accelerators, and for diverse functions in fuels, cladding, moderator and control materials, structural, functional, and waste materials.

  3. Nuclear risk management

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This paper gives the list of contributions to Eurosafe 2001 which was organised around two round tables on the first day and five seminars on the second day. The first round table dealt with the technical, organisational and societal aspects of risk management aimed at the prevention of accidents in nuclear power plants. The second round table focused on radiological risks from the normal operation of nuclear installations. Special consideration has been given to the involvement of stakeholders. The five seminars were held in order to provide opportunities for comparing experiences and learning about recent activities of IRSN, GRS and their partners in the European Union and Eastern Europe: - Safety assessment and analysis of nuclear installations; -Nuclear safety research; -Environment and radiation protection; - Waste management; - Nuclear material security. (author)

  4. Nuclear-pumped lasers

    CERN Document Server

    Prelas, Mark

    2016-01-01

    This book focuses on Nuclear-Pumped Laser (NPL) technology and provides the reader with a fundamental understanding of NPLs, a review of research in the field, and exploration of large scale NPL system design and applications. Early chapters look at the fundamental properties of lasers, nuclear-pumping and nuclear reactions that may be used as drivers for nuclear-pumped lasers. The book goes on to explore the efficient transport of energy from the ionizing radiation to the laser medium and then the operational characteristics of existing nuclear-pumped lasers. Models based on Mathematica, explanations and a tutorial all assist the reader’s understanding of this technology. Later chapters consider the integration of the various systems involved in NPLs and the ways in which they can be used, including beyond the military agenda. As readers will discover, there are significant humanitarian applications for high energy/power lasers, such as deflecting asteroids, space propulsion, power transmission and mining....

  5. Nuclear transfer in rodents.

    Science.gov (United States)

    Mullins, Linda J; Wilmut, Ian; Mullins, John J

    2004-01-01

    Cloning is the asexual reproduction of an individual, such that the offspring have an essentially identical nuclear genome. Nuclear transfer and cloning have been achieved in a number of species, namely sheep, cows, goats, rabbits, cats and mice, but have been largely unsuccessful, so far, in dogs, primates and rats. Clearly, contributory factors which affect the outcome of successful cloning experiments are not universally applicable to all species. One theme common to all cloning experiments, however, is the overall inefficiency of the process, typically 0-4%. A number of factors contribute to nuclear transfer inefficiency, and we will review mouse cloning experiments, which address these problems, highlighting the importance of donor nucleus choice (somatic or ES cell, fetal or adult, quiescent or actively dividing). Finally, we will summarize the emerging principles which appear to govern nuclear reprogramming and production of clones, and will consider the application of nuclear transfer to the rat.

  6. Fundamentals of nuclear physics

    CERN Document Server

    Takigawa, Noboru

    2017-01-01

    This book introduces the current understanding of the fundamentals of nuclear physics by referring to key experimental data and by providing a theoretical understanding of principal nuclear properties. It primarily covers the structure of nuclei at low excitation in detail. It also examines nuclear forces and decay properties. In addition to fundamentals, the book treats several new research areas such as non-relativistic as well as relativistic Hartree–Fock calculations, the synthesis of super-heavy elements, the quantum chromodynamics phase diagram, and nucleosynthesis in stars, to convey to readers the flavor of current research frontiers in nuclear physics. The authors explain semi-classical arguments and derivation of its formulae. In these ways an intuitive understanding of complex nuclear phenomena is provided. The book is aimed at graduate school students as well as junior and senior undergraduate students and postdoctoral fellows. It is also useful for researchers to update their knowledge of diver...

  7. Nuclear Pasta Formation

    CERN Document Server

    Schneider, A S; Hughto, J; Berry, D K

    2013-01-01

    The formation of complex nonuniform phases of nuclear matter, known as nuclear pasta, is studied with molecular dynamics simulations containing 51200 nucleons. A phenomenological nuclear interaction is used that reproduces the saturation binding energy and density of nuclear matter. Systems are prepared at an initial density of 0.10fm$^{-3}$ and then the density is decreased by expanding the simulation volume at different rates to densities of 0.01 fm$^{-3}$ or less. An originally uniform system of nuclear matter is observed to form spherical bubbles ("swiss cheese"), hollow tubes, flat plates ("lasagna"), thin rods ("spaghetti") and, finally, nearly spherical nuclei with decreasing density. We explicitly observe nucleation mechanisms, with decreasing density, for these different pasta phase transitions. Topological quantities known as Minkowski functionals are obtained to characterize the pasta shapes. Different pasta shapes are observed depending on the expansion rate. This indicates non equilibrium effects...

  8. World nuclear outlook 1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-09-29

    As part of the EIA program to provide energy information, this analysis report presents the current status and projections through 2015 of nuclear capacity, generation, and fuel cycle requirements for all countries in the world using nuclear power to generate electricity for commercial use. It also contains information and forecasts of developments in the uranium market. Long-term projections of US nuclear capacity, generation, and spent fuel discharges for two different scenarios through 2040 are developed for the Department of Energy`s Office of Civilian Radioactive Waste Management (OCRWM). In turn, the OCRWM provides partial funding for preparation of this report. The projections of uranium requirements are provided to the Organization for Economic Cooperation and Development (OECD) for preparation of the Nuclear Energy Agency/OECD report, Summary of Nuclear Power and Fuel Cycle Data in OECD Member Countries.

  9. Nuclear power economics

    Energy Technology Data Exchange (ETDEWEB)

    Emsley, Ian; Cobb, Jonathan [World Nuclear Association, London (United Kingdom)

    2017-04-15

    Many countries recognize the substantial role which nuclear power has played in providing energy security of supply, reducing import dependence and reducing greenhouse gas and polluting emissions. Nevertheless, as such considerations are far from being fully accounted for in liberalized or deregulated power markets, nuclear plants must demonstrate their viability in these markets on commercial criteria as well as their lifecycle advantages. Nuclear plants are operating more efficiently than in the past and unit operating costs are low relative to those of alternative generating technologies. The political risk facing the economic functioning of nuclear in a number of countries has increased with the imposition of nuclear-specific taxes that in some cases have deprived operators of the economic incentive to continue to operate existing plants.

  10. World nuclear outlook 1994

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-01

    As part of the EIA program to provide energy information, this analysis report presents the current status and projections through 2010 of nuclear capacity, generation, and fuel cycle requirements for all countries in the world using nuclear power to generate electricity for commercial use. It also contains information and forecasts of developments in the uranium market. Long-term projections of US nuclear capacity, generation, and spent fuel discharges for three different scenarios through 2040 are developed for the Department of Energy`s Office of Civilian Radioactive Waste Management (OCRWM). In turn, the OCRWM provides partial funding for preparation of this report. The projections of uranium requirements are provided to the Organization for Economic Cooperation and Development (OECD) for preparation of the Nuclear Energy Agency/OECD report, Summary of Nuclear Power and Fuel Cycle Data in OECD Member Countries.

  11. European Nuclear Features

    Energy Technology Data Exchange (ETDEWEB)

    Barre, B.; Gonzalez, E.; Diaz Diaz, J.L.; Jimenez, J.L.; Velarde, G.; Navarro, J.M.; Hittner, D.; Dominguez, M.T.; Bollini, G.; Martin, A.; Suarez, J.; Traini, E.; Lang-Lenton, J.

    2004-09-01

    ''European Nuclear Features - ENF'' is a joint publication of the three specialized technical journals, Nuclear Espana (Spain), Revue General Nucleaire (France), and atw - International Journal of Nuclear Power (Germany). The ENF support the international Europeen exchange of information and news about energy and nuclear power. News items, comments, and scientific and technical contributions will cover important aspects of the field. The second issue of ENF contains contributions about theses topics, among others: Institutional and Political Changes in the EU. - CIEMAT Department of Nuclear Fission: A General Overview. - Inertial Fusion Energy at DENIM. - High Temperature Reactors. European Research Programme. - On Site Assistance to Khmelnitsky NPP 1 and 2 (Ukraine). - Dismantling and Decommissioning of Vandellos I. (orig.)

  12. Nuclear medicine consensus; Consenso sobre medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Camargo, Edwaldo E.; Marin Neto, Jose Antonio; Naccarato, Alberto F.P.; Ramires, Jose Antonio F.; Castro, Iran de; Paiva, Eleuses Vieira; Thom, Anneliese F.; Barroso, Adelanir; Blum, Bernardo; Hollanda, Ricardo; Mansur, Antonio de Padua

    1995-04-01

    The use of nuclear methods in cardiovascular diseases is studied concerning diagnosis, risk, prognosis, indications and accuracy. Aspects concerning chronic coronary artery disease, myocardial ischemia, myocardial infarction, viable myocardium, valvular heart disease, ventricular dysfunction, heart transplant, congenital heart diseases in adults, are discussed.

  13. Nuclear war, nuclear proliferation, and their consequences

    Energy Technology Data Exchange (ETDEWEB)

    Sanruddin, A.K.

    1986-01-01

    The proceedings of a colloquium convened by the Groupe de Bellerive offers the contributions of Carl Sagan, Gabriel Garcia Marquez, Kenneth Galbraith, Pierre Trudeau, Edward Kennedy, and other eminent scientists, politicians, and strategists on the subject of the proliferation of nuclear weaponry and its potential ramifications.

  14. O livro da alma

    Directory of Open Access Journals (Sweden)

    Oliver Tolle

    2016-12-01

    Full Text Available Trata-se de compreender os pressupostos da filosofia concreta pretendida por Johann Gottfried Herder (1744-1803 em uma série de textos redigidos durante as décadas de 1760-70. Se, por um lado, Herder demonstra afinidade com a mesma harmonia preestabelecida que está na base de leibnizianos como Gottsched e Baumgarten, por outro, ele aprofunda a discussão sobre a origem do conhecimento humano ao reduzir a importância de juízos de valor universal e acentuar a necessidade de uma aproximação constante das sensações que se agitam obscuramente no fundo da alma. Disso resulta uma concepção inusitada de sabedoria, a qual depende de uma renúncia à posse confortável de conhecimentos abstratos e da aceitação da natureza cambiante e apenas parcialmente perscrutável daquilo que nos move. Se com isso perde-se a certeza, abre-se em contrapartida uma dimensão essencialmente ativa e sensível de realização no mundo.

  15. O esvaziamento da cultura

    Directory of Open Access Journals (Sweden)

    Andressa Paula de Andrade

    2015-01-01

    Full Text Available Trata-se da resenha da obra "A civilização do espetáculo: uma radiografia do nosso tempo e da nossa cultura" de autoria de Mario Vargas Llosa, ganhador do Nobel de Literatura em 2010. O trabalho busca compreender este tempo em que a diversão assume maior relevância em detrimento da cultura profunda e reflexiva. Destarte, a todo momento se olha para o passado com vistas a examinar este fenômeno que se tornou um verdadeiro "esvaziamento cultural". Outrossim, busca-se elucidar que embora ocorra um progresso científico, acesso a educação e a tecnologia de forma vertiginosa, isso não significa que a as artes avançaram na mesma velocidade, pelo contrário, acabou estagnando e já não visa mais a modificação de estruturas, mas apenas entreter.

  16. O labirinto da contemporaneidade

    Directory of Open Access Journals (Sweden)

    Lang, Charles Elias

    2011-01-01

    Full Text Available O presente trabalho discute a modernidade e a produção da subjetividade contemporânea. Toma-se como modelo o labirinto de Eco (1985. Existem três tipos de labirintos: o labirinto clássico, o maneirístico, e a rede. O clássico é unicursal. Assim que se entra, a única coisa que se pode fazer é chegar ao centro e, do centro, só o que se pode fazer é encontrar uma saída. O maneirístico propõe escolhas alternativas. Todos os percursos levam a um ponto morto, com exceção de um que leva à saída. Na rede, cada ponto pode ter conexão com qualquer outro ponto. Se os labirintos anteriores têm um interior e um exterior, a rede, extensível ao infinito, não tem nem um dentro nem um fora. A partir deste modelo discute-se a produção de individualidades e subjetividades, do corpo como meio de comunicação e a produção de imagens do corpo através da mídia

  17. Dj Da Hai

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Miko Da Hai is DJ at a Xi’an disco bar. At work, in his cool attire, the pulsing disco beat punctuated by his distinctive vocal commentary, he makes a striking impression. The job having come his way by chance, Miko is now a skilled and experienced DJ of eight years’ standing. This may be

  18. The Relationship between Nuclear Disarmament and Nuclear Nonproliferation

    Institute of Scientific and Technical Information of China (English)

    Sun; Xiangli

    2015-01-01

    The history of nuclear weapons development since the end of World War II is also one of nuclear arms control.There are two major aspects that represent the global efforts of nuclear arms control,which include limiting on nuclear weapon development in quantities and qualities,and limiting on the proliferation of nuclear weapons and the relevant research and development technologies.The limitation on the nuclear weapons development constitute

  19. Annual report of the Brazilian Directory of R and D - 1995; Relatorio anual da Diretoria de P e D 1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The Directory of Research and Development of the Brazilian CNEN (National Nuclear Energy Commission) presents the report for 1995. The publication describes and cover activities carried out in the following areas: nuclear reactors, nuclear fuel cycle, control and instrumentation, application of nuclear techniques, radioisotope production, materials of nuclear interest, radioactive wastes and irradiated materials. Three institutes accomplish Directory`s Programme: Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/MG); Instituto de Engenharia Nuclear (IEN/RJ); and Instituto de Pesquisas Energeticas e Nucleares (IPEN/SP). It is important to mention that the Institutes carry out a numberless of activities in cooperation with others institutions such as: universities, industries, private and government organizations. This cooperation is administrated through research contracts and agreements. 28 figs., 11 tabs.

  20. 76 FR 19148 - Entergy Nuclear Operations, Inc., Entergy Nuclear Vermont Yankee, LLC, Vermont Yankee Nuclear...

    Science.gov (United States)

    2011-04-06

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Entergy Nuclear Operations, Inc., Entergy Nuclear Vermont Yankee, LLC, Vermont Yankee Nuclear... (10 CFR), Section 2.206, ``Requests for Action under this Subpart,'' the U.S. Nuclear...

  1. 77 FR 7184 - Entergy Nuclear Indian Point 2, LLC; Entergy Nuclear Operations, Inc.; Indian Point Nuclear...

    Science.gov (United States)

    2012-02-10

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Entergy Nuclear Indian Point 2, LLC; Entergy Nuclear Operations, Inc.; Indian Point Nuclear Generating Unit No. 2; Exemption 1.0 Background Entergy Nuclear Operations, Inc. (Entergy or the licensee)...

  2. 77 FR 8904 - Entergy Nuclear Indian Point 3, LLC.; Entergy Nuclear Operations, Inc., Indian Point Nuclear...

    Science.gov (United States)

    2012-02-15

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Entergy Nuclear Indian Point 3, LLC.; Entergy Nuclear Operations, Inc., Indian Point Nuclear Generating Unit 3; Exemption 1.0 Background Entergy Nuclear Operations, Inc. (Entergy or the licensee) is...

  3. 75 FR 39057 - Entergy Nuclear Operations, Inc.; Entergy Nuclear Vermont Yankee, LLC; Vermont Yankee Nuclear...

    Science.gov (United States)

    2010-07-07

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Entergy Nuclear Operations, Inc.; Entergy Nuclear Vermont Yankee, LLC; Vermont Yankee Nuclear... CFR), Section 2.206, ``Requests for Action under this Subpart,'' the U.S. Nuclear...

  4. Your Radiologist Explains Nuclear Medicine

    Medline Plus

    Full Text Available ... Sponsored by Image/Video Gallery Your Radiologist Explains Nuclear Medicine Transcript Welcome to Radiology Info dot org ... I’d like to talk to you about nuclear medicine. Nuclear medicine offers the potential to identify ...

  5. Your Radiologist Explains Nuclear Medicine

    Medline Plus

    Full Text Available ... Sponsored by Image/Video Gallery Your Radiologist Explains Nuclear Medicine Transcript Welcome to Radiology Info dot org ... I’d like to talk to you about nuclear medicine. Nuclear medicine offers the potential to identify ...

  6. Your Radiologist Explains Nuclear Medicine

    Medline Plus

    Full Text Available ... by Image/Video Gallery Your Radiologist Explains Nuclear Medicine Transcript Welcome to Radiology Info dot org Hello! ... d like to talk to you about nuclear medicine. Nuclear medicine offers the potential to identify disease ...

  7. Your Radiologist Explains Nuclear Medicine

    Medline Plus

    Full Text Available ... nuclear medicine. Nuclear medicine offers the potential to identify disease in its earliest stage, often before symptoms ... benefit of an accurate diagnosis far outweighs any risk. To learn more about nuclear medicine, visit Radiology ...

  8. Your Radiologist Explains Nuclear Medicine

    Science.gov (United States)

    ... Sponsored by Image/Video Gallery Your Radiologist Explains Nuclear Medicine Transcript Welcome to Radiology Info dot org Hello! ... I’d like to talk to you about nuclear medicine. Nuclear medicine offers the potential to identify disease ...

  9. Modelling the nuclear parton distributions

    CERN Document Server

    Kulagin, S A

    2016-01-01

    We review a semi-microscopic model of nuclear parton distributions, which takes into account a number of nuclear effects including Fermi motion and nuclear binding, nuclear meson-exchange currents and off-shell corrections to bound nucleon distributions as well as nuclear shadowing effect. We also discuss applications of the model to the lepton-nuclear deep-inelastic scattering, Drell-Yan process and neutrino total cross sections.

  10. Advances in nuclear physics

    CERN Document Server

    Vogt, Erich

    1975-01-01

    Review articles on three topics of considerable current interest make up the present volume. The first, on A-hypernuclei, was solicited by the editors in order to provide nuclear physicists with a general description of the most recent developments in a field which this audience has largely neglected or, perhaps, viewed as a novelty in which a bizarre nuclear system gave some information about the lambda-nuclear intersection. That view was never valid. The very recent developments reviewed here-particularly those pertaining to hypernuclear excitations and the strangeness exchange reactions-emphasize that this field provides important information about the models and central ideas of nuclear physics. The off-shell behavior of the nucleon-nucleon interaction is a topic which was at first received with some embarrassment, abuse, and neglect, but it has recently gained proper attention in many nuclear problems. Interest was first focused on it in nuclear many-body theory, but it threatened nuclear physicists'comf...

  11. Evaluated Nuclear Data

    Energy Technology Data Exchange (ETDEWEB)

    Oblozinsky, P.; Oblozinsky,P.; Herman,M.; Mughabghab,S.F.

    2010-10-01

    This chapter describes the current status of evaluated nuclear data for nuclear technology applications. We start with evaluation procedures for neutron-induced reactions focusing on incident energies from the thermal energy up to 20 MeV, though higher energies are also mentioned. This is followed by examining the status of evaluated neutron data for actinides that play dominant role in most of the applications, followed by coolants/moderators, structural materials and fission products. We then discuss neutron covariance data that characterize uncertainties and correlations. We explain how modern nuclear evaluated data libraries are validated against an extensive set of integral benchmark experiments. Afterwards, we briefly examine other data of importance for nuclear technology, including fission yields, thermal neutron scattering and decay data. A description of three major evaluated nuclear data libraries is provided, including the latest version of the US library ENDF/B-VII.0, European JEFF-3.1 and Japanese JENDL-3.3. A brief introduction is made to current web retrieval systems that allow easy access to a vast amount of up-to-date evaluated nuclear data for nuclear technology applications.

  12. Nuclear forensics: Soil content

    Energy Technology Data Exchange (ETDEWEB)

    Beebe, Merilyn Amy [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-08-31

    Nuclear Forensics is a growing field that is concerned with all stages of the process of creating and detonating a nuclear weapon. The main goal is to prevent nuclear attack by locating and securing nuclear material before it can be used in an aggressive manner. This stage of the process is mostly paperwork; laws, regulations, treaties, and declarations made by individual countries or by the UN Security Council. There is some preliminary leg work done in the form of field testing detection equipment and tracking down orphan materials; however, none of these have yielded any spectacular or useful results. In the event of a nuclear attack, the first step is to analyze the post detonation debris to aid in the identification of the responsible party. This aspect of the nuclear forensics process, while reactive in nature, is more scientific. A rock sample taken from the detonation site can be dissolved into liquid form and analyzed to determine its chemical composition. The chemical analysis of spent nuclear material can provide valuable information if properly processed and analyzed. In order to accurately evaluate the results, scientists require information on the natural occurring elements in the detonation zone. From this information, scientists can determine what percentage of the element originated in the bomb itself rather than the environment. To this end, element concentrations in soils from sixty-nine different cities are given, along with activity concentrations for uranium, thorium, potassium, and radium in various building materials. These data are used in the analysis program Python.

  13. Perspectives of Nuclear Physics

    Science.gov (United States)

    Faessler, Amand

    2003-04-01

    The organizers of this meeting have asked me to present perspectives of nuclear physics. This means to identify the areas where nuclear physics will be expanding in the next future. In six chapters a short overview of these areas will be given, where I expect that nuclear physics will develop quite fast: (1) Quantum Chromodynamics and effective field theories in the confinement region. (2) Nuclear structure at the limits. (3) High energy heavy ion collisions. (4) Nuclear astrophysics. (5) Neutrino physics. (6) Test of physics beyond the standard model by rare processes. After a survey over these six points I will pick out a few topics where I will go more in details. There is no time to give for all six points detailed examples. I shall discuss the following examples of the six topics mentionned above: (1) The perturbative chiral quark model and the nucleon Σ-term. (2) VAMPIR (Variation After Mean field Projection In Realistic model spaces and with realistic forces) as an example of the nuclear structure renaissance. (3) Measurement of important astrophysical nuclear reactions in the Gamow peak. (4) The solar neutrino problem. As examples for testing new physics beyond the standard model by rare processes I had prepared to speak about the measurement of the electric neutron dipole moment and of the neutrinoless double beta decay. But the time is limited and so I have to skip these points, although they are extremely interesting.

  14. Transitoriedade ou o desterro da certeza

    Directory of Open Access Journals (Sweden)

    Paulo José Carvalho da Silva

    2012-12-01

    Full Text Available O tema da transitoriedade era lugar-comum da medicina da alma da primeira modernidade. Este artigo analisa algumas dessas fontes para mostrar como a dor do tempo e os males da alma atinentes eram relacionados a um modo de encarar a fugacidade do tempo e a fragilidade da vida. Dá-se destaque, sobretudo, às construções em torno da condição humana enquanto desterro da certeza.

  15. Nuclear charge and neutron radii and nuclear matter: trend analysis

    CERN Document Server

    Reinhard, P -G

    2016-01-01

    Radii of charge and neutron distributions are fundamental nuclear properties. They depend on both nuclear interaction parameters related to the equation of state of infinite nuclear matter and on quantal shell effects, which are strongly impacted by the presence of nuclear surface. In this work, by studying the dependence of charge and neutron radii, and neutron skin, on nuclear matter parameters, we assess different mechanisms that drive nuclear sizes. We apply nuclear density functional theory using a family of Skyrme functionals obtained by means of different optimization protocols targeting specific nuclear properties. By performing the Monte-Carlo sampling of reasonable functionals around the optimal parametrization, we study correlations between nuclear matter paramaters and observables characterizing charge and neutron distributions. We demonstrate the existence of the strong converse relation between the nuclear charge radii and the saturation density of symmetric nuclear matter and also between the n...

  16. Virtual nuclear weapons

    Energy Technology Data Exchange (ETDEWEB)

    Pilat, J.F.

    1997-08-01

    The term virtual nuclear weapons proliferation and arsenals, as opposed to actual weapons and arsenals, has entered in recent years the American lexicon of nuclear strategy, arms control, and nonproliferation. While the term seems to have an intuitive appeal, largely due to its cyberspace imagery, its current use is still vague and loose. The author believes, however, that if the term is clearly delineated, it might offer a promising approach to conceptualizing certain current problems of proliferation. The first use is in a reference to an old problem that has resurfaced recently: the problem of growing availability of weapon-usable nuclear materials in civilian nuclear programs along with materials made `excess` to defense needs by current arms reduction and dismantlement. It is argued that the availability of these vast materials, either by declared nuclear-weapon states or by technologically advanced nonweapon states, makes it possible for those states to rapidly assemble and deploy nuclear weapons. The second use has quite a different set of connotations. It is derived conceptually from the imagery of computer-generated reality. In this use, one thinks of virtual proliferation and arsenals not in terms of the physical hardware required to make the bomb but rather in terms of the knowledge/experience required to design, assemble, and deploy the arsenal. Virtual weapons are a physics reality and cannot be ignored in a world where knowledge, experience, materials, and other requirements to make nuclear weapons are widespread, and where dramatic army reductions and, in some cases, disarmament are realities. These concepts are useful in defining a continuum of virtual capabilities, ranging from those at the low end that derive from general technology diffusion and the existence of nuclear energy programs to those at the high end that involve conscious decisions to develop or maintain militarily significant nuclear-weapon capabilities.

  17. Nuclear Forensic Inferences Using Iterative Multidimensional Statistics

    Energy Technology Data Exchange (ETDEWEB)

    Robel, M; Kristo, M J; Heller, M A

    2009-06-09

    Nuclear forensics involves the analysis of interdicted nuclear material for specific material characteristics (referred to as 'signatures') that imply specific geographical locations, production processes, culprit intentions, etc. Predictive signatures rely on expert knowledge of physics, chemistry, and engineering to develop inferences from these material characteristics. Comparative signatures, on the other hand, rely on comparison of the material characteristics of the interdicted sample (the 'questioned sample' in FBI parlance) with those of a set of known samples. In the ideal case, the set of known samples would be a comprehensive nuclear forensics database, a database which does not currently exist. In fact, our ability to analyze interdicted samples and produce an extensive list of precise materials characteristics far exceeds our ability to interpret the results. Therefore, as we seek to develop the extensive databases necessary for nuclear forensics, we must also develop the methods necessary to produce the necessary inferences from comparison of our analytical results with these large, multidimensional sets of data. In the work reported here, we used a large, multidimensional dataset of results from quality control analyses of uranium ore concentrate (UOC, sometimes called 'yellowcake'). We have found that traditional multidimensional techniques, such as principal components analysis (PCA), are especially useful for understanding such datasets and drawing relevant conclusions. In particular, we have developed an iterative partial least squares-discriminant analysis (PLS-DA) procedure that has proven especially adept at identifying the production location of unknown UOC samples. By removing classes which fell far outside the initial decision boundary, and then rebuilding the PLS-DA model, we have consistently produced better and more definitive attributions than with a single pass classification approach. Performance of the

  18. Economic Analysis of Nuclear Energy

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Man Ki; Moon, K. H.; Kim, S. S.; Lim, C. Y.; Oh, K. B

    2006-12-15

    It has been well recognized that securing economic viabilities along with technologies are very important elements in the successful implementation of nuclear R and D projects. The objective of the Project is to help nuclear energy to be utilized in an efficient way by analyzing major issues related with nuclear economics. The study covers following subjects: the role of nuclear in the future electric supply system, economic analysis of nuclear R and D project, contribution to the regional economy from nuclear power. In addition, the study introduces the international cooperation in the methodological area of efficient use of nuclear energy by surveying the international activities related with nuclear economics.

  19. American Society of Nuclear Cardiology

    Science.gov (United States)

    ... much more! class="box-li"> Journal of Nuclear Cardiology Official publication of the American Society of Nuclear Cardiology Clinical Guidelines Procedures, Appropriate Use Criteria, Information Statements ...

  20. Nuclear Physics Department annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-07-01

    This annual report presents articles and abstracts published in foreign journals, covering the following subjects: nuclear structure, nuclear reactions, applied physics, instrumentation, nonlinear phenomena and high energy physics

  1. Nuclear engineering vocabulary

    Energy Technology Data Exchange (ETDEWEB)

    Dumont, X. [FRAMATOME, Dept. Corporate R and D, 92 - Paris-La-Defence (France); Andrieux, C. [CEA Saclay, Direction des Technologies de l' Information, DTI, 91 - Gif sur Yvette (France)

    2001-07-01

    The members of the CSTNIN - the Special Commission for Nuclear Engineering Terminology and Neology - have just produced a Nuclear Engineering Vocabulary, published by SFEN. A 120-page document which, to date, includes 400 nuclear engineering terms or expressions. For each term or expression, this Glossary gives: the primary and secondary subject field in which it is applied, a possible abbreviation, its definition, a synonym if appropriate, any relevant comments, any associated word(s), the English equivalent, its status on the date of publication of the Glossary. (author)

  2. Theoretical nuclear physics

    CERN Document Server

    Blatt, John M

    2010-01-01

    A classic work by two leading physicists and scientific educators endures as an uncommonly clear and cogent investigation and correlation of key aspects of theoretical nuclear physics. It is probably the most widely adopted book on the subject. The authors approach the subject as ""the theoretical concepts, methods, and considerations which have been devised in order to interpret the experimental material and to advance our ability to predict and control nuclear phenomena.""The present volume does not pretend to cover all aspects of theoretical nuclear physics. Its coverage is restricted to

  3. Nuclear physics of stars

    CERN Document Server

    Iliadis, Christian

    2015-01-01

    Most elements are synthesized, or ""cooked"", by thermonuclear reactions in stars. The newly formed elements are released into the interstellar medium during a star's lifetime, and are subsequently incorporated into a new generation of stars, into the planets that form around the stars, and into the life forms that originate on the planets. Moreover, the energy we depend on for life originates from nuclear reactions that occur at the center of the Sun. Synthesis of the elements and nuclear energy production in stars are the topics of nuclear astrophysics, which is the subject of this book

  4. Nuclear regulation and safety

    Energy Technology Data Exchange (ETDEWEB)

    Hendrie, J.M.

    1982-01-01

    Nuclear regulation and safety are discussed from the standpoint of a hypothetical country that is in the process of introducing a nuclear power industry and setting up a regulatory system. The national policy is assumed to be in favor of nuclear power. The regulators will have responsibility for economic, reliable electric production as well as for safety. Reactor safety is divided into three parts: shut it down, keep it covered, take out the afterheat. Emergency plans also have to be provided. Ways of keeping the core covered with water are discussed. (DLC)

  5. Fictions of nuclear disaster

    Energy Technology Data Exchange (ETDEWEB)

    Dowling, D.

    1987-01-01

    This work is critical study of literary interpretations of the nuclear holocaust. The author examines more than 250 stories and novels dealing with the theme of nuclear power and its devastating potential implications. Addressing such topics as the scientist and Armageddon, the role of religion, future evolution and mutation, and the postnuclear society, the author assesses the response of Bradbury, Lessing, Malamud, Shute, Huxley, Vonnegut, Heinlein, and others to the threat of nuclear apocalypse, with in-depth analyses of Alter Miller's A canticle for Leibowitz and Russell Hoban's Riddley Walker.

  6. Baltic nuclear projects

    Energy Technology Data Exchange (ETDEWEB)

    Adlys, Gediminas; Adliene, Diana [Kaunas Univ. of Technology (Lithuania)

    2009-07-01

    The Authors discuss the Baltic energy policy with respect to new nuclear power plants for Lithuania, Belarus and the Kaliningrad region. The construction of a new nuclear power plant in Lithuania would threaten Russian interests in the region. Therefore Lithuania is looking to Russian plans to build a new nuclear power plant in the Kaliningrad region as an attempt to subvert Lithuania's foreign partners and potential investors from participating in the Visaginas NPP project. However, the authors conclude, that the Visaginas NPP project is and must be the preferential project for the EU and NATO member states.

  7. Practical nuclear medicine

    CERN Document Server

    Gemmell, Howard G; Sharp, Peter F

    2006-01-01

    Nuclear medicine plays a crucial role in patient care, and this book is an essential guide for all practitioners to the many techniques that inform clinical management. The first part covers the scientific basis of nuclear medicine, the rest of the book deals with clinical applications. Diagnostic imaging has an increasingly important role in patient management and, despite advances in other modalities (functional MRI and spiral CT), nuclear medicine continues to make its unique contribution by its ability to demonstrate physiological function. This book is also expanded by covering areas of d

  8. Nuclear energy debate

    CERN Document Server

    Healey, Justin

    2012-01-01

    The debate over the introduction of nuclear power in Australia has recently become more heated in light of safety concerns over the nuclear reactor meltdown emergency in Japan. Australia has also just committed to a carbon trading scheme to address its reliance on coal-fired energy and reduce greenhouse emissions. With 40% of the world's uranium located in Australia, the economic, environmental and health considerations are significant. This book contains an overview of global nuclear energy use and production, and presents a range of current opinions debating the pros and cons of Australia's

  9. Nuclear Medicine Annual, 1989

    Energy Technology Data Exchange (ETDEWEB)

    Freeman, L.M.; Weissmann, H.S.

    1989-01-01

    Among the highlights of Nuclear Medicine Annual, 1989 are a status report on the thyroid scan in clinical practice, a review of functional and structural brain imaging in dementia, an update on radionuclide renal imaging in children, and an article outlining a quality assurance program for SPECT instrumentation. Also included are discussions on current concepts in osseous sports and stress injury scintigraphy and on correlative magnetic resonance and radionuclide imaging of bone. Other contributors assess the role of nuclear medicine in clinical decision making and examine medicolegal and regulatory aspects of nuclear medicine.

  10. Advances in Nuclear Energy

    Science.gov (United States)

    Frois, B.

    2005-04-01

    This paper briefly reviews the next generations of nuclear reactors and the perspectives of development of nuclear energy. Advanced reactors will progressively replace the existing ones during the next two decades. Future systems of the fourth generation are planned to be built beyond 2030. These systems have been studied in the framework of the "Generation IV" International Forum. The goals of these systems is to have a considerable increase in safety, be economically competitive and produce a significantly reduced volume of nuclear wastes. The closed fuel cycle is preferred.

  11. Reporting nuclear cardiology

    DEFF Research Database (Denmark)

    Trägårdh, Elin; Hesse, Birger; Knuuti, Juhani

    2015-01-01

    are available; therefore, an European position statement on how to report nuclear cardiology might be useful. The current paper combines the limited existing evidence with expert consensus, previously published recommendations as well as current clinical practices. For all the applications discussed......, and conclusion of the report. The statement also discusses recommended terminology in nuclear cardiology, image display, and preliminary reports. It is hoped that this statement may lead to more attention to create well-written and standardized nuclear cardiology reports and eventually lead to improved clinical...

  12. Nuclear manpower training

    Energy Technology Data Exchange (ETDEWEB)

    Suh, In Suk; Lee, H. Y.; Joe, B. J.; Lee, S. H.; Lee, E. J.; Yoo, B. H.; Seo, K. W.; Lee, W. K.; Jun, H. I.; Yang, K. N.; Kim, Y. J.; Kim, I. H.; Kim, M. Y.; Ju, Y. C.; Hyun, H. Y.; Choi, I. G.; Hong, C. S.; Won, J. Y.; Nam, J. Y.; Lee, H. J.

    1997-01-01

    This report describes the annual results of training courses. the scope and contents are as follows: 1. Regional and interregional training courses 2. Training courses assisted by foreign experts 3. Training courses for nuclear industry personnel 4. Training courses for internal staff-members 5. Training courses under the law. This Nuclear Training Center executed the open-door training courses for 2,400 engineers/scientists from the regulatory body, nuclear industries, research institutes and other related organizations by means of offering 51 training courses during the fiscal year 1996. (author). 23 refs.

  13. Interleukin-2 induces tyrosine phosphorylation and nuclear translocation of stat3 in human T lymphocytes

    DEFF Research Database (Denmark)

    Nielsen, M; Svejgaard, A; Skov, S

    1994-01-01

    that stimulation through the IL-2R induced tyrosine phosphorylation and subsequent nuclear translocation of stat3, a newly identified member of the signal transducers and activators of transcription (STAT) family of proteins. In contrast, stat1 proteins were not tyrosine phosphorylated after IL-2 ligation, whereas...... an apparent molecular mass of 84 kDa and was not recognized by stat3 or stat1 mAb or antisera. Since IL-2 induced nuclear translocation of the 84 kDa protein and stat3 followed identical kinetics, p84 is a candidate for a new, yet undefined, member of the STAT family. Taken together, we report that IL-2...... induces tyrosine phosphorylation and subsequent nuclear translocation of stat3 and an as yet undefined 84-kDa protein in antigen-specific human T cell lines....

  14. Regulation of neuronal differentiation by proteins associated with nuclear bodies.

    Directory of Open Access Journals (Sweden)

    Benjamin Förthmann

    Full Text Available Nuclear bodies are large sub-nuclear structures composed of RNA and protein molecules. The Survival of Motor Neuron (SMN protein localizes to Cajal bodies (CBs and nuclear gems. Diminished cellular concentration of SMN is associated with the neurodegenerative disease Spinal Muscular Atrophy (SMA. How nuclear body architecture and its structural components influence neuronal differentiation remains elusive. In this study, we analyzed the effects of SMN and two of its interaction partners in cellular models of neuronal differentiation. The nuclear 23 kDa isoform of Fibroblast Growth Factor - 2 (FGF-2(23 is one of these interacting proteins - and was previously observed to influence nuclear bodies by destabilizing nuclear gems and mobilizing SMN from Cajal bodies (CBs. Here we demonstrate that FGF-2(23 blocks SMN-promoted neurite outgrowth, and also show that SMN disrupts FGF-2(23-dependent transcription. Our results indicate that FGF-2(23 and SMN form an inactive complex that interferes with neuronal differentiation by mutually antagonizing nuclear functions. Coilin is another nuclear SMN binding partner and a marker protein for Cajal bodies (CBs. In addition, coilin is essential for CB function in maturation of small nuclear ribonucleoprotein particles (snRNPs. The role of coilin outside of Cajal bodies and its putative impacts in tissue differentiation are poorly defined. The present study shows that protein levels of nucleoplasmic coilin outside of CBs decrease during neuronal differentiation. Overexpression of coilin has an inhibitory effect on neurite outgrowth. Furthermore, we find that nucleoplasmic coilin inhibits neurite outgrowth independent of SMN binding revealing a new function for coilin in neuronal differentiation.

  15. Nuclear Transparency in the lightest nuclear interactions

    CERN Document Server

    Ajaz, M; Khan, K H; Zaman, A

    2012-01-01

    Some experimental results on nuclear transparency effect in pC- and dC-interaction at 4.2 A GeV/c (JINR Dubna) are presented. The "half angle" ({\\theta}1/2) technique was used and the particles with emission angle greater and less than {\\theta}1/2 are considered separately. The results of the experimental study have been compared with the simulation data coming from the Dubna Cascade model. The values of average multiplicity, average momentum, and average transverse momentum of charged pions and protons are analyzed as a function of the number of identified protons in an event. We observed some behaviors for the data which could be considered as some nuclear transparency effects. The lasts have been divided into three main groups depending on their probable behavior: leading effect; cascade effect; medium effect.

  16. Best linear unbiased estimation of the nuclear masses

    CERN Document Server

    Bouriquet, Bertrand

    2009-01-01

    This paper presents methods to provide an optimal evaluation of the nuclear masses. The techniques used for this purpose come from data assimilation (DA) that allows combining, in an optimal and consistent way, information coming from experiment and from numerical modelling. Using all the available information, it leads to improve not only masses evaluations, but also their uncertainties. Each newly evaluated mass value is associated with some accuracy that is sensibly reduced with respect to the values given in tables, especially in the case of the less well-known masses. In this paper, we first introduce a useful tool of DA, the Best Linear Unbiased Estimation (BLUE). This BLUE method is applied to nuclear mass tables and some results of improvement are shown. Then finally, some post validation diagnostics, demonstrating that the method has been used in optimal conditions, are described and used to validate the results.

  17. O Tema da Cidadania

    Directory of Open Access Journals (Sweden)

    Adriano Moreira

    2009-11-01

    Full Text Available Neste artigo tentaremos evidenciar a natureza pelo menos tripartida da cidadania que responde ao incontroladoglobalismo: uma que se confunde com os direitos humanos, exigentes querem seja o Estado o seu interlocutor,quer não exista tal interlocutor; outra que se insere na fenomenologia dos grandes espaços em formação, de que aUnião Europeia é exemplo, e a que o projecto da Constituição Europeia, agora em recolhimento de meditação, jáoferece o apoio de uma definição específica de direitos; e finalmente, a cidadania que diz respeito à relação com oEstado soberano em crise de redefinição, sobretudo, pelo que nos interessa, no espaço europeu.

  18. Fisiopatologia da asma grave

    OpenAIRE

    Todo-Bom, Ana; Mota-Pinto, Anabela

    2006-01-01

    Não tem resumo. Transcreve-se o primeiro parágrafo: A história natural da asma e os condicionalismos de uma evolução para formas moderadas ou graves não está completamente estabelecida. Contudo, quer os factores genéticos quer os factores ambientais, serão determinantes na fisiopatologia e no prognóstico da doença. A asma é, por definição, uma doença inflamatória crónica das vias aéreas caracterizada por uma obstrução brônquica generalizada mas variável que é, pelo menos parcialmente, reve...

  19. Nuclear Waste and Ethics

    Energy Technology Data Exchange (ETDEWEB)

    Damveld, Herman [Groningen (Netherlands)

    2003-10-01

    In the past years in almost all conferences on storage of nuclear waste, ethics has been considered as an important theme. But what is ethics? We will first give a sketch of this branch of philosophy. We will then give a short explanation of the three principal ethical theories. In the discussion about storage of nuclear waste, the ethical theory of utilitarianism is often implicitly invoked. In this system future generations weigh less heavily than the present generation, so that people of the future are not considered as much as those now living. We reject this form of reasoning. The discussion about nuclear waste is also sometimes pursued from ethical points of departure such as equality and justice. But many loose ends remain in these arguments, which gives rise to the question of whether the production and storage of nuclear waste is responsible.

  20. Nuclear material operations manual

    Energy Technology Data Exchange (ETDEWEB)

    Tyler, R.P.

    1981-02-01

    This manual provides a concise and comprehensive documentation of the operating procedures currently practiced at Sandia National Laboratories with regard to the management, control, and accountability of nuclear materials. The manual is divided into chapters which are devoted to the separate functions performed in nuclear material operations-management, control, accountability, and safeguards, and the final two chapters comprise a document which is also issued separately to provide a summary of the information and operating procedures relevant to custodians and users of radioactive and nuclear materials. The manual also contains samples of the forms utilized in carrying out nuclear material activities. To enhance the clarity of presentation, operating procedures are presented in the form of playscripts in which the responsible organizations and necessary actions are clearly delineated in a chronological fashion from the initiation of a transaction to its completion.

  1. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... beforehand, especially if sedation is to be used. Most nuclear medicine exams will involve an injection in ... PET/CT, SPECT/CT and PET/MR) are most often used in children with cancer, epilepsy and ...

  2. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... the bladder, such as with a vesicoureteral reflux study. It can take several seconds to a few ... until the nuclear physician checks the images in case additional images are needed. top of page What ...

  3. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... nuclear medicine imaging uses small amounts of radioactive materials called radiotracers, a special camera and a computer ... medical imaging that uses small amounts of radioactive material to diagnose and determine the severity of or ...

  4. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... of page What are some common uses of the procedure? Children's (pediatric) nuclear medicine imaging is performed ... the thyroid gland. top of page How does the procedure work? With ordinary x-ray examinations, an ...

  5. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... necessitate sedation for your child. You will receive instructions prior to the exam if your child will ... child has been sedated, you will receive specific instructions to be followed after leaving the nuclear medicine ...

  6. Nuclear Fuel Reprocessing

    Energy Technology Data Exchange (ETDEWEB)

    Michael F. Simpson; Jack D. Law

    2010-02-01

    This is an a submission for the Encyclopedia of Sustainable Technology on the subject of Reprocessing Spent Nuclear Fuel. No formal abstract was required for the article. The full article will be attached.

  7. Desalting and Nuclear Energy

    Science.gov (United States)

    Burwell, Calvin C.

    1971-01-01

    Future use of nuclear energy to produce electricity and desalted water is outlined. Possible desalting processes are analyzed to show economic feasibility and the place in planning in world's economic growth. (DS)

  8. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... of page How does the nuclear medicine procedure work? With ordinary x-ray examinations, an image is ... placed over the patient's body. SPECT involves the rotation of the gamma camera heads around the patient's ...

  9. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... bladder. bones. liver and gallbladder. gastrointestinal tract. heart. lungs. brain. thyroid. Nuclear medicine scans are typically used ... gas via a mask, such as with a lung scan. Bladder: some exams require a catheter to ...

  10. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... help diagnose childhood disorders that are present at birth or that develop during childhood. It provides unique ... diagnose childhood disorders that are congenital (present at birth) or that develop during childhood. Physicians use nuclear ...

  11. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... the procedure. top of page Who interprets the results and how do we get them? A radiologist ... radiotracer administered are small, diagnostic nuclear medicine procedures result in low radiation exposure, acceptable for diagnostic exams. ...

  12. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... placed over the patient's body. SPECT involves the rotation of the gamma camera heads around the patient's ... the child has been sedated, you will receive specific instructions to be followed after leaving the nuclear ...

  13. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... used in children with cancer, epilepsy and back pain. top of page What does the equipment look ... being recorded. Though nuclear imaging itself causes no pain, children may experience some discomfort from having to ...

  14. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... to be followed after leaving the nuclear medicine facility. Through the natural process of radioactive decay, the ... Please note RadiologyInfo.org is not a medical facility. Please contact your physician with specific medical questions ...

  15. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... body. jaundice in newborns and older children. epilepsy . location, anatomy and function of the thyroid gland. top ... to be followed after leaving the nuclear medicine facility. Through the natural process of radioactive decay, the ...

  16. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... used. Most nuclear medicine exams will involve an injection in a vein in your child’s arm or ... are noninvasive and, with the exception of intravenous injections, are usually painless medical tests that help physicians ...

  17. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... top of page What are the benefits vs. risks? Benefits The information provided by nuclear medicine examinations ... diagnosis or to determine appropriate treatment, if any. Risks Because the doses of radiotracer administered are small, ...

  18. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... liver and gallbladder. gastrointestinal tract. heart. lungs. brain. thyroid. Nuclear medicine scans are typically used to help ... children. epilepsy . location, anatomy and function of the thyroid gland. top of page How does the procedure ...

  19. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... jaundice in newborns and older children. epilepsy . location, anatomy and function of the thyroid gland. top of ... full size with caption Related Articles and Media General Nuclear Medicine Children's (Pediatric) CT (Computed Tomography) Epilepsy ...

  20. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... organs and tissues in your body. Hybrid imaging techniques (PET/CT, SPECT/CT and PET/MR) are ... equipment look like? The special camera and imaging techniques used in nuclear medicine include the gamma camera ...

  1. Nuclear Clusters in Astrophysics

    Energy Technology Data Exchange (ETDEWEB)

    Kubono, S.; Binh, Dam N.; Hayakawa, S.; Hashimoto, H.; Kahl, D.; Wakabayashi, Y.; Yamaguchi, H. [Center for Nuclear Study (CNS), University of Tokyo, Wako Branch at RIKEN 2-1 Hirosawa, Wako, Saitama, 351-0198 (Japan); Teranishi, T. [Department of Physics, Kyushu University, Fukuoka, 812-8581 (Japan); Iwasa, N. [Department of Physics, Tohoku University, Sendai, 980-8578 (Japan); Komatsubara, T. [Department of Physics, Tsukuba University, Ibaraki, 305-8571 (Japan); Kato, S. [Department of Physics, Yamagata University, Yamagata, 990-8560 (Japan); Khiem, Le H. [Institute of Physics, Vietnam Academy for Science and Technology, Hanoi (Viet Nam)

    2010-03-01

    The role of nuclear clustering is discussed for nucleosynthesis in stellar evolution with Cluster Nucleosynthesis Diagram (CND) proposed before. Special emphasis is placed on alpha-induced stellar reactions together with molecular states for O and C burning.

  2. THE NUCLEAR ENCOUNTER PROBABILITY

    NARCIS (Netherlands)

    SMULDERS, PJM

    1994-01-01

    This Letter dicusses the nuclear encounter probability as used in ion channeling analysis. A formulation is given, incorporating effects of large beam angles and beam divergence. A critical examination of previous definitions is made.

  3. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... diagnostic nuclear medicine procedures result in low radiation exposure, acceptable for diagnostic exams. Thus, the radiation risk ... long-term adverse effects from such low-dose exposure. For more information about safety in pediatric radiology ...

  4. Low temperature nuclear heat

    Energy Technology Data Exchange (ETDEWEB)

    Kotakorpi, J.; Tarjanne, R. (comps.)

    1977-08-01

    The meeting was concerned with the use of low grade nuclear heat for district heating, desalination, process heat, and agriculture and aquaculture. The sessions covered applications and demand, heat sources, and economics.

  5. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... molecular information. In many centers, nuclear medicine images can be superimposed with computed tomography (CT) or magnetic ... small hand-held device resembling a microphone that can detect and measure the amount of the radiotracer ...

  6. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... painless medical tests that help physicians diagnose and evaluate medical conditions. These imaging scans use radioactive materials called radiopharmaceuticals or radiotracers . Depending on the type of nuclear medicine exam, the radiotracer is either ...

  7. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... including many types of cancers, heart disease, gastrointestinal, endocrine, neurological disorders and other abnormalities within the body. Because nuclear medicine procedures are able to pinpoint molecular activity within ...

  8. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... variety of diseases, including many types of cancers, heart disease, gastrointestinal, endocrine, neurological disorders and other abnormalities ... and bladder. bones. liver and gallbladder. gastrointestinal tract. heart. lungs. brain. thyroid. Nuclear medicine scans are typically ...

  9. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... will be inhaled as a gas via a mask, such as with a lung scan. Bladder: some ... A radiologist or other physician who has specialized training in nuclear medicine will interpret the images and ...

  10. International Nuclear Security

    Energy Technology Data Exchange (ETDEWEB)

    Doyle, James E. [Los Alamos National Laboratory

    2012-08-14

    This presentation discusses: (1) Definitions of international nuclear security; (2) What degree of security do we have now; (3) Limitations of a nuclear security strategy focused on national lock-downs of fissile materials and weapons; (4) What do current trends say about the future; and (5) How can nuclear security be strengthened? Nuclear security can be strengthened by: (1) More accurate baseline inventories; (2) Better physical protection, control and accounting; (3) Effective personnel reliability programs; (4) Minimize weapons-usable materials and consolidate to fewer locations; (5) Consider local threat environment when siting facilities; (6) Implement pledges made in the NSS process; and (7) More robust interdiction, emergency response and special operations capabilities. International cooperation is desirable, but not always possible.

  11. Children's (Pediatric) Nuclear Medicine

    Medline Plus

    Full Text Available ... determine appropriate treatment, if any. Risks Because the doses of radiotracer administered are small, diagnostic nuclear medicine procedures result in low radiation exposure, acceptable for diagnostic exams. Thus, the radiation ...

  12. Western Nuclear Science Alliance

    Energy Technology Data Exchange (ETDEWEB)

    Steve Reese; George Miller; Stephen Frantz; Denis Beller; Denis Beller; Ed Morse; Melinda Krahenbuhl; Bob Flocchini; Jim Elliston

    2010-12-07

    The primary objective of the INIE program is to strengthen nuclear science and engineering programs at the member institutions and to address the long term goal of the University Reactor Infrastructure and Education Assistance Program.

  13. Desalting and Nuclear Energy

    Science.gov (United States)

    Burwell, Calvin C.

    1971-01-01

    Future use of nuclear energy to produce electricity and desalted water is outlined. Possible desalting processes are analyzed to show economic feasibility and the place in planning in world's economic growth. (DS)

  14. [da Vinci surgical system].

    Science.gov (United States)

    Watanabe, Gou; Ishikawa, Norihiro

    2014-07-01

    The da Vinci surgical system was developed by Intuitive Surgical Inc. in the United States as an endoscopic surgical device to assist remote control surgeries. In 1998, the Da Vinci system was first used for cardiothoracic procedures. Currently a combination of robot-assisted internal thoracic artery harvest together with coronary artery bypass grafting (CABG) through a mini-incision (ThoraCAB) or totally endoscopic procedures including anastomoses under robotic assistance (TECAB) are being conducted for the treatment of coronary artery diseases. With the recent advances in catheter interventions, hybrid procedures combining catheter intervention with ThoraCAB or TECAB are anticipated in the future.On the other hand, with the decrease in number of coronary artery bypass surgeries, the share of valvular surgeries is expected to increase in the future. Among them, mitral valvuloplasty for mitral regurgitation is anticipated to be conducted mainly by low-invasive procedures, represented by minimally invasive cardiac surgery( MICS) and robot-assisted surgery. Apart from the intrinsic good surgical view, robotic-assisted systems offer additional advantages of the availability of an amplified view and the easy to observe the mitral valve in the physiological position. Thus, robotic surgical surgeries that make complicated procedures easier are expected to accomplish further developments in the future. Furthermore, while the number of surgeries for atrial septal defects has decreased dramatically following the widespread use of Amplatzer septal occluder, robotic surgery may become a good indication for cases in which the Amplatzer device is not indicated. In Japan, clinical trial of the da Vinci robotic system for heart surgeries has been completed. Statutory approval of the da Vinci system for mitral regurgitation and atrial septal defects is anticipated in the next few years.

  15. JPRS Report, Nuclear Developments.

    Science.gov (United States)

    2007-11-02

    COMERCIO 21 Aug] 23 NEAR EAST & SOUTH ASIA EGYPT Agreements Signed to Develop Domestic Uranium [AL-JUMHURIYAH 2 Aug] 24 INDIA Two Large...Empresas Nucleares Brasileiras S.A. (Nuclebras) to Industrias Nucleares do Brasil S.A. (INB), and trans- ferred the shares of its capital stock...96.622 authorizes the establishment of Uranium of Brasil S.A. as a subsidiary of INB, with headquarters in the city of Caldas, Minas Gerais State

  16. Nuclear Threats and Security

    OpenAIRE

    Garry Jacobs; Winston P. Nagan

    2012-01-01

    This article presents highlights and insights from the International Conference on “Nuclear Threats and Security” organized by the World Academy of Art and Science in association with the European Leadership Network and the Dag Hammarskjöld University College of International Relations and Diplomacy and sponsored by NATO at the Inter-University Centre, Dubrovnik on September 14-16, 2012. The conference examined important issues related to nuclear non-proliferation and disarmament, the legalit...

  17. Nuclear fuel element

    Science.gov (United States)

    Meadowcroft, Ronald Ross; Bain, Alastair Stewart

    1977-01-01

    A nuclear fuel element wherein a tubular cladding of zirconium or a zirconium alloy has a fission gas plenum chamber which is held against collapse by the loops of a spacer in the form of a tube which has been deformed inwardly at three equally spaced, circumferential positions to provide three loops. A heat resistant disc of, say, graphite separates nuclear fuel pellets within the cladding from the plenum chamber. The spacer is of zirconium or a zirconium alloy.

  18. JPRS Report, Nuclear Developments

    Science.gov (United States)

    2016-03-24

    Pilotless Plane in 1991 [DAVAR 5 Nov] ....................................................... 19 Arens Rules Out Iraqi Nuclear Capability [Jerusalem...islands near is allowed to dispose of nuclear waste on the island, Prachuab Kiri Khan to see if there is any appropriate destroying not only the ecology ...controversial aspects of the issue has to Government was investing much more in the parallel do with a series of charges made by the ecological group

  19. INVAP's Nuclear Calculation System

    OpenAIRE

    Ignacio Mochi

    2011-01-01

    Since its origins in 1976, INVAP has been on continuous development of the calculation system used for design and optimization of nuclear reactors. The calculation codes have been polished and enhanced with new capabilities as they were needed or useful for the new challenges that the market imposed. The actual state of the code packages enables INVAP to design nuclear installations with complex geometries using a set of easy-to-use input files that minimize user errors due to confusion or mi...

  20. JPRS Report, Nuclear Developments

    Science.gov (United States)

    2016-03-24

    50 SWEDEN Poll Surveys Views on Nuclear Power [DAGENS NYHETER 8 Mar] ........................................... 51 JPRS-TND...Indonesian Chong Chun-ki, chairman of the Korean Committee for 0600 GMT 9 Apr 91 Cultural Relations with Foreign Countries, indicated [Text] Indonesia has...taken additional mea- plants. In Sweden , where the nuclear power industry has sures. The leak occurred because of a neuparine plastic been most

  1. Nuclear Plant Inspection

    Science.gov (United States)

    1983-01-01

    Engineers from the Power Authority of the State of New York use a Crack Growth Analysis Program supplied by COSMIC (Computer Software Management and Information Center) in one stage of nuclear plant inspection. Welds of the nuclear steam supply system are checked for cracks; radiographs, dye penetration and visual inspections are performed to locate cracks in the metal structure and welds. The software package includes three separate crack growth analysis models and enables necessary repairs to be planned before serious problems develop.

  2. Superpower nuclear minimalism

    Energy Technology Data Exchange (ETDEWEB)

    Graben, E.K.

    1992-01-01

    During the Cold War, the United States and the Soviet Union competed in building weapons -- now it seems like America and Russia are competing to get rid of them the fastest. The lengthy process of formal arms control has been replaced by exchanges of unilateral force reductions and proposals for reciprocal reductions not necessarily codified by treaty. Should superpower nuclear strategies change along with force postures President Bush has yet to make a formal pronouncement on post-Cold War American nuclear strategy, and it is uncertain if the Soviet/Russian doctrine of reasonable sufficiency formulated in the Gorbachev era actually heralds a change in strategy. Some of the provisions in the most recent round of unilateral proposals put forth by Presidents Bush and Yeltsin in January 1992 are compatible with a change in strategy. Whether such a change has actually occurred remains to be seen. With the end of the Cold War and the breakup of the Soviet Union, the strategic environment has fundamentally changed, so it would seem logical to reexamine strategy as well. There are two main schools of nuclear strategic thought: a maximalist school, mutual assured destruction (MAD) which emphasizes counterforce superiority and nuclear war- fighting capability, and a MAD-plus school, which emphasizes survivability of an assured destruction capability along with the ability to deliver small, limited nuclear attacks in the event that conflict occurs. The MAD-plus strategy is based on an attempt to conventionalize nuclear weapons which is unrealistic.

  3. Perspectives of Nuclear Physics

    CERN Document Server

    Faessler, A

    2002-01-01

    The organizers of this meeting have asked me to present perspectives of nuclear physics. This means to identify the areas where nuclear physics will be expanding in the next future. In six chapters a short overview of these areas will be given, where I expect that nuclear physics willdevelop quite fast: A. Quantum Chromodynamics and effective field theories in the confinement region; B. Nuclear structure at the limits; C. High energy heavy ion collisions; D. Nuclear astrophysics; E. Neutrino physics; F. Test of physics beyond the standard model by rare processes. After a survey over these six points I will pick out a few topics where I will go more in details. There is no time to give for all six points detailed examples. I shall discuss the following examples of the six topics mentionned above: 1. The perturbative chiral quark model and the nucleon $\\Sigma$-term, 2. VAMPIR (Variation After Mean field Projection In Realistic model spaces and with realistic forces) as an example of the nuclear structure renais...

  4. Nuclear tristetraprolin acts as a corepressor of multiple steroid nuclear receptors in breast cancer cells

    Directory of Open Access Journals (Sweden)

    Tonatiuh Barrios-García

    2016-06-01

    Full Text Available Tristetraprolin (TTP is a 34-kDa, zinc finger-containing factor that in mammalian cells acts as a tumor suppressor protein through two different mechanisms. In the cytoplasm TTP promotes the decay of hundreds of mRNAs encoding cell factors involved in inflammation, tissue invasion, and metastasis. In the cell nucleus TTP has been identified as a transcriptional corepressor of the estrogen receptor alpha (ERα, which has been associated to the development and progression of the majority of breast cancer tumors. In this work we report that nuclear TTP modulates the transactivation activity of progesterone receptor (PR, glucocorticoid receptor (GR and androgen receptor (AR. In recent years these steroid nuclear receptors have been shown to be of clinical and therapeutical relevance in breast cancer. The functional association between TTP and steroid nuclear receptors is supported by the finding that TTP physically interacts with ERα, PR, GR and AR in vivo. We also show that TTP overexpression attenuates the transactivation of all the steroid nuclear receptors tested. In contrast, siRNA-mediated reduction of endogenous TTP expression in MCF-7 cells produced an increase in the transcriptional activities of ERα, PR, GR and AR. Taken together, these results suggest that the function of nuclear TTP in breast cancer cells is to act as a corepressor of ERα, PR, GR and AR. We propose that the reduction of TTP expression observed in different types of breast cancer tumors may contribute to the development of this disease by producing a dysregulation of the transactivation activity of multiple steroid nuclear receptors.

  5. Density content of nuclear symmetry energy from nuclear observables

    Indian Academy of Sciences (India)

    B K Agrawal

    2014-11-01

    The nuclear symmetry energy at a given density measures the energy transferred in converting symmetric nuclear matter into the pure neutron matter. The density content of nuclear symmetry energy remains poorly constrained. Our recent results for the density content of the nuclear symmetry energy, around the saturation density, extracted using experimental data for accurately known nuclear masses, giant resonances and neutron-skin thickness in heavy nuclei are summarized.

  6. Radioactive target needs for nuclear reactor physics and nuclear astrophysics

    OpenAIRE

    Jurado, B.; Barreau, G.; Bacri, C. O.

    2010-01-01

    Nuclear Instruments and Methods in Physics Research Section A - In press.; Nuclear reaction cross sections of short-lived nuclei are key inputs for new generation nuclear reactor simulations and for models describing the nucleosynthesis of elements. After discussing various topics of nuclear astrophysics and reactor physics where the demand of nuclear data on unstable nuclei is strong, we describe the general characteristics of the targets needed to measure the requested data. In some cases t...

  7. Panel report: nuclear physics

    Energy Technology Data Exchange (ETDEWEB)

    Carlson, Joseph A [Los Alamos National Laboratory; Hartouni, Edward P [LLNL

    2010-01-01

    Nuclear science is at the very heart of the NNSA program. The energy produced by nuclear processes is central to the NNSA mission, and nuclear reactions are critical in many applications, including National Ignition Facility (NIF) capsules, energy production, weapons, and in global threat reduction. Nuclear reactions are the source of energy in all these applications, and they can also be crucial in understanding and diagnosing the complex high-energy environments integral to the work of the NNSA. Nuclear processes are complex quantum many-body problems. Modeling and simulation of nuclear reactions and their role in applications, coupled tightly with experiments, have played a key role in NNSA's mission. The science input to NNSA program applications has been heavily reliant on experiment combined with extrapolations and physical models 'just good enough' to provide a starting point to extensive engineering that generated a body of empirical information. This body of information lacks the basic science underpinnings necessary to provide reliable extrapolations beyond the domain in which it was produced and for providing quantifiable error bars. Further, the ability to perform additional engineering tests is no longer possible, especially those tests that produce data in the extreme environments that uniquely characterize these applications. The end of testing has required improvements to the predictive capabilities of codes simulating the reactions and associated applications for both well known and well characterized cases as well as incompletely known cases. Developments in high performance computing, computational physics, applied mathematics and nuclear theory have combined to make spectacular advances in the theory of fission, fusion and nuclear reactions. Current research exploits these developments in a number of Office of Science and NNSA programs, and in joint programs such as the SciDAC (Science Discovery through Advanced Computing) that

  8. Thinking About Preventing Nuclear War.

    Science.gov (United States)

    Ground Zero, Washington, DC.

    Potential paths to nuclear war and the available means of prevention of nuclear war are discussed. Presented is a detailed description of six nuclear war scenarios, and brief examples of types of potential deterrents to nuclear war (firebreaks) which are relevant for each. To be effective, the right combination of firebreaks must be used, the…

  9. Nuclear War and Science Teaching.

    Science.gov (United States)

    Hobson, Art

    1983-01-01

    Suggests that science-related material on nuclear war be included in introductory courses. Lists nuclear war topics for physics, psychology, sociology, biology/ecology, chemistry, geography, geology/meteorology, mathematics, and medical science. Also lists 11 lectures on nuclear physics which include nuclear war topics. (JN)

  10. O paradoxo da legitimidade a partir da legalidade segundo Habermas

    Directory of Open Access Journals (Sweden)

    Aylton Barbieri Durão

    2010-12-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2008v7n2p233A autonomia jurídica surge da conexão co-originária entre a autnomia privada dos indivíduos e a autonomia pública dos cidadãos, a qual, contudo, ficou velada ao longo da história da filosofia política e jurídica por causa da herança metafísica do direito natural racional e da filosofia da consciência que gerou uma relação de competição entre os direitos humanos e a vontade soberana do povo. Por causa desta conexão entre a autonomia privada e pública, o processo democrática de produção de normas jurídicas apresenta um aparente paradoxo porque os cidadãos tanto podem aprovar as normas motivados pela busca do êxito da racionalidade estratégica como orientados pelo reconhecimento de sua validade através da racionalidade comunicativa, o qual se dissolve, contudo, quando se considera a democracia como um processo aberto para a solidariedade dos cidadãos no mundo da vida.

  11. O Cognitivismo e o problema da Cientificidade da Psicologia

    OpenAIRE

    Arja Castañon, Gustavo

    2010-01-01

    Este artigo trata do problema do estatuto científico da psicologia. Seu objetivo é avaliar em que medida o cognitivismo solucionou objeções históricas levantadas contra a possibilidade de uma psicologia científica. Com base em avaliação de textos clássicos da “revolução cognitiva”, se conclui que esta abordagem apresentou um projeto filosófico de ciência psicológica que resolveu a maior parte dos problemas ontológicos e epistemológicos endêmicos da disciplina, como o da natureza inquantificáv...

  12. NUCLEAR CHEMISTRY ANNUAL REPORT 1970

    Energy Technology Data Exchange (ETDEWEB)

    Authors, Various

    1971-05-01

    Papers are presented for the following topics: (1) Nuclear Structure and Nuclear Properties - (a) Nuclear Spectroscopy and Radioactivity; (b) Nuclear Reactions and Scattering; (c) Nuclear Theory; and (d) Fission. (2) Chemical and Atomic Physics - (a) Atomic and Molecular Spectroscopy; and (b) Hyperfine Interactions. (3) Physical, Inorganic, and Analytical Chemistry - (a) X-Ray Crystallography; (b) Physical and Inorganic Chemistry; (c) Radiation Chemistry; and (d) Chemical Engineering. (4) Instrumentation and Systems Development.

  13. Nuclear Propulsion for Space (Rev.)

    Energy Technology Data Exchange (ETDEWEB)

    Corliss, William R; Schwenk, Francis C

    1971-01-01

    The operation of nuclear rockets and a description of the development of nuclear rockets in the U.S. is given. Early developments and Project Rover, Project Pluto, and the NERVA (Nuclear Engine for Rocket Vehicle Application) Program are detailed. The Nuclear Rocket Development Station facilities in Nevada are described. The possibilities and advantages of using nuclear rockets for missions beginning from an earth orbit and moving outward toward higher earth orbits, the moon, and the planets are discussed.

  14. Let us learn nuclear power

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Wan Sang

    2006-08-15

    This book teach us nuclear power through nine chapters with recommendation and a prolog. The contents of this book are how did Formi become a scientist? what does atom look like? discover of neutron, what is an isotope?, power in the nuclear, various radiation, artificial nuclear transformation, nuclear fission and clinging atomic nucleus. It also has an appendix on SF story ; an atom bomb war. It explains basic nuclear physic in easy way with pictures.

  15. Nuclear Regulatory Commission information digest

    Energy Technology Data Exchange (ETDEWEB)

    None,

    1990-03-01

    The Nuclear Regulatory Commission information digest provides summary information regarding the US Nuclear Regulatory Commission, its regulatory responsibilities, and areas licensed by the commission. This is an annual publication for the general use of the NRC Staff and is available to the public. The digest is divided into two parts: the first presents an overview of the US Nuclear Regulatory Commission and the second provides data on NRC commercial nuclear reactor licensees and commercial nuclear power reactors worldwide.

  16. A Utopia da Paz Universal

    Directory of Open Access Journals (Sweden)

    Daniel Serrão

    2009-11-01

    Full Text Available Como o Homem atingiu a fase da cultura exterior simbólica em que se encontra actualmente. Apresentaçãosucinta da teoria dos patamares evolutivos de Merlin Donald. O paradigma "popperiano" da investigaçãocientífica moderna: verificar ou falsificar hipóteses. O caso típico da teoria darwiniana da evolução das espéciesvivas. A Bioética como diálogo de saberes em ordem à criação de uma nova sabedoria (wisdom. Apresentação doconceito de Van Rensselaer Potter. O "credo" de Potter e a utopia da paz universal.

  17. Nuclear fundamentals remain

    Directory of Open Access Journals (Sweden)

    Stošić Zoran V.

    2012-01-01

    Full Text Available For Japan, the situation has become extremely difficult since counter-measures to deal with the nuclear accident had to be carried out along with dealing with the broader disaster caused by earthquake and the tsunami. In terms of damage, the Tohoku earthquake and the tsunami have caused the most fatalities and the largest economic loss ever from an earthquake and/or tsunami. The impact of this natural disaster is present not only in Japan but world-wide. The state of affairs in the global energy sector is affected by the consequences which may be lasting for decades. These effects are subject of this article dealing not with the nuclear accident at Fukushima Daiichi NPPs itself, but rather with the world-wide consequences and after effect on nuclear energy development. This includes: environmental damages, socio-economic effects, actions of safety authorities, extended protective measures against external events, the impact on global nuclear energy, triggered nuclear phase-outs and changes in new build plans as well as the sustainability of energy mix itself and an outlook.

  18. Nuclear Manpower Development

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, I. A.; Lee, K. B.; Shin, B. C. [KAERI, Daejeon (Korea, Republic of)

    2010-12-15

    The industry-university-research collaborative education is aiming at developing national nuclear human resources to satisfy with the increasing needs from the industry. For this efforts are being made to develop curricula customized to respective industry needs by improving existing ones. As the demand for training programs for the university students and domestic nuclear personnel was increasing owing to revitalization of nuclear industry, Nuclear Training Center (NTC) improved previous education programs to meet the needs. NTC has operated 2 education programs on research reactor experiments for the university students, and 18 programs on nuclear technology related experiment courses in 2010. Furthermore, the NTC developed new education programs related to 'standardized research reactor system design'. Also the request from universities for internship programs was increased by about three times in 2010 compared to those of the previous year, and this required to develop relevant curricula. In 2005, NTC developed KAERI-ACE, as a unique competency-based staff education system of Korea Atomic Energy Research Institute (KAERI). Based on the system, the NTC has performed 'systematic education'. In 2008, NTC was awarded Best HRD(Human Resource Development) in Public sector for the first time as a government-supported research institute. In 2009, the system was improved to become KAERI-ACE 2.0, based on which, in 2010, NTC improved and diversified education programs including various cyber training programs

  19. Custos da qualidade

    Directory of Open Access Journals (Sweden)

    Gilberto Caetano

    2009-01-01

    Full Text Available Este artigo pretende demonstrar através de uma síntese histórico-conceitual , a evolução da importância do sistema de qualidade, bem como a sua mensuração no processo de tomada de decisão das organizações frente à competitividade estabelecida no contexto da globalização. Assim, procura dar ênfase à ação planejada no sentido de reduzir ou eliminar falhas e defeitos nos vários processos, com vistas a agregar valor ao cliente e ao mesmo tempo reduzir os custos da não-conformidade. Palavras-chave: Custo, qualidade, satisfação, inspeção, controle, requisito, conformidade, não-conformidade, mensuração, processo, prevenção, problema e avaliação. Abstract This article intends to demonstrate through a historical-conceptual synthesis, the evolution of the importance of the quality system, as well as your measurement the process of decision making of the organizations front to the established competitiveness in the context of the globalization. Like this, it tries to give emphasis to the action drifted in the sense of to reduce or to eliminate flaws and defects in the several processes, with views to join value to the customer and at the same time to reduce the costs of the no-conformity. Key-words: Cost, quality, satisfaction, inspection, control, requirement, conformity, no-conformity, measurement, process, prevention, problem and evaluation.

  20. Pioneirismo da associacao brasileira de enfermagem no desenvolvimento da pesquisa: da revista ao centro de pesquisa

    Directory of Open Access Journals (Sweden)

    Lais de Araujo Pereira

    2013-09-01

    Full Text Available O presente estudo tem como objetivo analisar as primeiras iniciativas da Associação Brasileira de Enfermagem para o desenvolvimento da pesquisa em enfermagem. Com um recorte temporal que engloba o período de 1932 a 1971, ano de criação da Revista Brasileira de Enfermagem à criação do Centro de Estudos e Pesquisas, da Associação Brasileira de Enfermagem. As fontes utilizadas foram documentos escritos localizados no Centro de Documentação da Escola de Enfermagem Anna Nery da Universidade Federal do Rio de Janeiro e no Centro de Memória da Associação Brasileira de Enfermagem, além de edições da revista localizadas na Biblioteca Setorial da Pós-Graduação da Escola de Enfermagem Anna Nery. Percebe-se, nesta análise, que os empreendimentos realizados por essa entidade representaram um verdadeiro espaço de investigação e de formação de enfermeiros pesquisadores no Brasil.

  1. Evaluation of natural radionuclide occurrence (Rn-222) in a nuclear facility that processes UF{sub 6} for the UO{sub 2} powder and pellet productions; Avaliacao da ocorrencia de nuclideos naturais (Rn-222) em uma instalacao nuclear que processa UF{sub 6} para a producao de po e pastilha de UO{sub 2} that processes UF{sub 6} for the UO{sub 2} powder

    Energy Technology Data Exchange (ETDEWEB)

    Mouco, Charles Dickens do Carmo Lacerda; Matta, Luiz Ernesto Santos Carvalho [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)

    2001-07-01

    This paper presents the early data from the concentration evaluation of Rn-222 in a nuclear facility that processes UF{sub 6} for the UO{sub 2} powder and tablet productions. Measurements were accomplished in the same points and under the same climatic conditions with the factory working and not working. The results showed that no significant alteration was detected in the obtained values in both situations. The average value was 15 and 18 Bq/m3 for operating and not operating respectively. There is no significant difference between data. The concentrations values of Rn-222 are lower than the internationally established limits for this radionuclide. The Rn-222 concentration values obtained, are probably originated from the building material, and the Rn-222 concentration levels are due to the great air exchange inside the factory. (author)

  2. Basic Nuclear Physics Research Needs for Nuclear Energy

    Science.gov (United States)

    Hill, Tony

    2008-10-01

    Basic nuclear physics research will play a central role in the development of the future nuclear facilities. Federal requirements for higher efficiencies, lower operating and construction costs, and advanced safeguards can all be impacted by the quality of nuclear data used in the fuel cycle calculations for design and licensing. Uncertainties in the underlying nuclear data propagate to uncertainties in integral and operational parameters, which drive margins and cost. Department of Energy (DOE) programs are underway to help develop the necessary nuclear research infrastructure. The Nuclear Energy office of DOE leads the development of new nuclear energy generation technologies to meet energy and climate change goals and advanced, proliferation resistant nuclear fuel technologies that maximize energy from nuclear fuel, while maintaining and enhancing the national nuclear infrastructure. These activities build on important work started over the last three years to deploy new nuclear plants in the United States by early in the next decade, and to develop advanced, next-generation nuclear technology. In this talk, I will discuss some of the foreseen opportunities and needs for basic nuclear research in nuclear energy.

  3. Model Action Plan for Nuclear Forensics and Nuclear Attribution

    Energy Technology Data Exchange (ETDEWEB)

    Dudder, G B; Niemeyer, S; Smith, D K; Kristo, M J

    2004-03-01

    Nuclear forensics and nuclear attribution have become increasingly important tools in the fight against illegal trafficking in nuclear and radiological materials. This technical report documents the field of nuclear forensics and nuclear attribution in a comprehensive manner, summarizing tools and procedures that have heretofore been described independently in the scientific literature. This report also provides national policy-makers, decision-makers, and technical managers with guidance for responding to incidents involving the interdiction of nuclear and radiological materials. However, due to the significant capital costs of the equipment and the specialized expertise of the personnel, work in the field of nuclear forensics has been restricted so far to a handful of national and international laboratories. In fact, there are a limited number of specialists who have experience working with interdicted nuclear materials and affiliated evidence. Most of the laboratories that have the requisite equipment, personnel, and experience to perform nuclear forensic analysis are participants in the Nuclear Smuggling International Technical Working Group or ITWG (see Section 1.8). Consequently, there is a need to disseminate information on an appropriate response to incidents of nuclear smuggling, including a comprehensive approach to gathering evidence that meets appropriate legal standards and to developing insights into the source and routes of nuclear and radiological contraband. Appendix A presents a ''Menu of Options'' for other Member States to request assistance from the ITWG Nuclear Forensics Laboratories (INFL) on nuclear forensic cases.

  4. Pensamento da America

    OpenAIRE

    2013-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em História, Florianópolis, 2013. Esta dissertação objetivou investigar a atividade editorial de Rui Ribeiro Couto e Renato Costa Almeida enquanto estes intelectuais estiveram à frente do Pensamento da America, uma publicação mensal vinculada ao A Manhã, jornal porta voz do Estado Novo. Este suplemento panamericano veio a público entre 1941 e 1949, no entanto a...

  5. Propriedades antioxidantes da melatonina

    OpenAIRE

    Teixeira,Adriana

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em Neurociências. Foram investigadas as ações da melatonina (MEL) contra a lipoperoxidação (LPO) induzida por hidroxil (OH), ascorbil (Asc) e peroxinitrito (ONOO-) em diversos modelos de membranas como lipossomas de fosfatidilcolina (LipPC) e asolecitina (LipASO), microssomas de cérebro (MicC) e fígado (MicF) e homogeneizado de cérebro (HC); e seu efeito contra enzimas ...

  6. A moral da infidelidade

    Directory of Open Access Journals (Sweden)

    Bundt, Roger

    2007-01-01

    Full Text Available Através das representações da infidelidade conjugal encontradas em três filmes do diretor Adrian Lyne realizados nas décadas de 1980, 1990 e 2000 (Atração Fatal, Proposta Indecente e Infidelidade, busca- se entender as idéias trabalhadas em cada obra, as maneiras de representar a mulher, a família, a relação amorosa e a monogamia, a partir das noções de dever e moral trabalhadas por Gilles Lipovetsky

  7. A moralidade da nanotecnologia

    OpenAIRE

    2012-01-01

    A nanotecnologia é um conjunto formado por saberes, técnicas e práticas que estudam e exploram as novas propriedades dos materiais, quando manipulados em níveis atômicos e moleculares. A possibilidade técnica de organizar e controlar a matéria, desde suas menores dimensões e unidades, pode implicar profundas transformações no processo industrial de produção e ter consequências, moralmente significativas, sobre as inter-relações humanas, a organização da conjuntura social vigente e o próprio f...

  8. Hot-cell for dismantling of nuclear gauges

    CERN Document Server

    Reis, L C A

    2000-01-01

    This work objectives the design of a hot-cell that will be used for dismantling of nuclear gauges. In the hot-cell, nuclear gauges received as radioactive waste at the Centro de Desenvolvimento da Tecnologia Nuclear - CDTN will be dismantled, in order to decrease the volume of radioactive waste to be stored at the Center. Sources originally conditioned as special form radioactive material will be tested and in case do not present leakage, the respective gauges will be disposable for reusing by radioisotope users. The remaining sources will be taken off the original shielding and conditioned in special packages adequate for storage and disposal. All steps of work, the hot-cell design and methodology for conditioning are also described.

  9. Aspectos moleculares da anemia falciforme

    Directory of Open Access Journals (Sweden)

    Galiza Neto Gentil Claudino de

    2003-01-01

    Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.

  10. Fractais : da geometria à videoarte

    OpenAIRE

    2013-01-01

    A descoberta da geometria fractal é datada de meados do séc. XX. É conhecida como a geometria da natureza já que permite descrever muitos fenómenos naturais que apresentam irregularidades que são impossíveis de descrever através dos princípios da geometria tradicional. O aparecimento de novas tecnologias digitais veio alterar o modo como a arte é encarada. Este trabalho pretende demonstrar possibilidades de integração da geometria fractal e a Teoria do Caos na criação de videoarte, b...

  11. Fisiopatogênese da dor

    Directory of Open Access Journals (Sweden)

    Miguel R. Covian

    1965-09-01

    Full Text Available O estudo da dor é um capítulo do estudo das bases neurofisiológicas da sensação, pois a dor nada mais é que uma sensação de conteúdo desagradável originada por estímulos nocivos. Enquanto a função das outras modalidades sensoriais é informativa ou gnósica, a dor é de proteção. O estudo da fisiología da dor compreende o estudo dos receptores, dos estímulos, das vias, das estruturas do sistema nervoso central que partici- pam da fisiología da dor, da percepção dolorosa e das reações motoras e neurovegetativas. São analisados os receptores e as vias e discutidas sua especificidade, assim como a transmissão da dor rápida e lenta por vias nervosas diferentes até o córtex cerebral. É comentada a influência da atenção na intensidade da percepção dolorosa e, com base em estudos experimentais, é considerado que o circuito retículo-córtico-reticular seja indispensável para a percepção da dor. No tocante à patologia da dor é examinada a insensibilidade congênita à dor, sendo admitida a hipótese de que em algumas sinapses é modificado o esquema de impulsos que darão lugar à sensação dolorosa. É destacado o papel do lobo frontal como parte de um mecanismo pòtenciador que condiciona o sofrimento geral do paciente. A dor referida é explicada pela teoria da "convergência-projeção" de fibras viscerais com fibras cutâneas dolorosas sôbre o mesmo neurônio em algun ponto da via sensitiva. O resultado da hipofisectomia trazendo uma diminuição ou anulação da dor no câncer do seio abre debates em tôrno do papel dos hormônios na percepção dolorosa.

  12. Testes Balisticos no Sul da Asia, a relacao India-Paquistao

    National Research Council Canada - National Science Library

    da Silva Machado, Artur Andrade

    2008-01-01

    ... realizou teste de seu missil balistico com capacidade nuclear de maior alcance, o Agni-III. O missil, capaz de atingir alvos a 4000 km de distancia em apenas 800 segundos, faz parte do arsenal indiano desenvolvido para manter o equilibrio de poder da China, que no comeco do mes, tivera divulgada por satelites estrangeiros sua nova base de submari...

  13. Exotic Nuclear Shapes:

    Science.gov (United States)

    Dudek, J.; Schunck, N.; Dubray, N.; Góźdź, A.

    After recalling some in principle known but seldom mentioned facts about variety of concepts/notions of the nuclear shapes, we briefly summarize the results of the recent microscopic calculations predicting the existence of the large-elongation (hyper-deformed) nuclear configurations — as well as another series of calculations predicting that some nuclei should exhibit high-rank symmetries: the tetrahedral and the octahedral ones. The latter are associated with 48- and 96- symmetry elements, respectively, of the nuclear mean-field Hamiltonian. Obviously the physics motivations behind the hyper-deformation and the high-rank symmetry studies are not the observations of the new geometrical forms as such; in our opinion these motivations are much deeper and are given in the text.

  14. Nuclear Parton Distribution Functions

    Energy Technology Data Exchange (ETDEWEB)

    I. Schienbein, J.Y. Yu, C. Keppel, J.G. Morfin, F. Olness, J.F. Owens

    2009-06-01

    We study nuclear effects of charged current deep inelastic neutrino-iron scattering in the framework of a {chi}{sup 2} analysis of parton distribution functions (PDFs). We extract a set of iron PDFs which are used to compute x{sub Bj}-dependent and Q{sup 2}-dependent nuclear correction factors for iron structure functions which are required in global analyses of free nucleon PDFs. We compare our results with nuclear correction factors from neutrino-nucleus scattering models and correction factors for charged-lepton--iron scattering. We find that, except for very high x{sub Bj}, our correction factors differ in both shape and magnitude from the correction factors of the models and charged-lepton scattering.

  15. Nuclear and particle physics

    CERN Document Server

    Amsler, Claude

    2015-01-01

    Nuclear and Particle Physics provides an introductory course on nuclear and particle physics for undergraduate and early-graduate students, which the author has taught for several years at the University of Zurich. It contains fundamentals on both nuclear and particle physics, giving emphasis to the discovery and history of developments in the field, and is experimentally/phenomenologically oriented. It contains detailed derivations of formulae such as 2–3 body phase space, the Weinberg-Salam model, and neutrino scattering. Originally published in German as Kern- und Teilchenphysik, several sections have been added to this new English version to cover modern topics, including updates on neutrinos, the Higgs boson, the top quark and bottom quark physics.

  16. Nuclear reactions an introduction

    CERN Document Server

    Paetz gen. Schieck, Hans

    2014-01-01

    Nuclei and nuclear reactions offer a unique setting for investigating three (and in some cases even all four) of the fundamental forces in nature. Nuclei have been shown – mainly by performing scattering experiments with electrons, muons, and neutrinos – to be extended objects with complex internal structures: constituent quarks; gluons, whose exchange binds the quarks together; sea-quarks, the ubiquitous virtual quark-antiquark pairs and, last but not least, clouds of virtual mesons, surrounding an inner nuclear region, their exchange being the source of the nucleon-nucleon interaction.   The interplay between the (mostly attractive) hadronic nucleon-nucleon interaction and the repulsive Coulomb force is responsible for the existence of nuclei; their degree of stability, expressed in the details and limits of the chart of nuclides; their rich structure and the variety of their interactions. Despite the impressive successes of the classical nuclear models and of ab-initio approaches, there is clearly no ...

  17. Pediatric nuclear medicine

    Energy Technology Data Exchange (ETDEWEB)

    1986-01-01

    This symposium presented the latest techniques and approaches to the proper medical application of radionuclides in pediatrics. An expert faculty, comprised of specialists in the field of pediatric nuclear medicine, discussed the major indications as well as the advantages and potential hazards of nuclear medicine procedures compared to other diagnostic modalities. In recent years, newer radiopharmaceuticals labeled with technetium-99m and other short-lived radionuclides with relatively favorable radiation characteristics have permitted a variety of diagnostic studies that are very useful clinically and carry a substantially lower radiation burden then many comparable X-ray studies. This new battery of nuclear medicine procedures is now widely available for diagnosis and management of pediatric patients. Many recent research studies in children have yielded data concerning the effacacy of these procedures, and current recommendations will be presented by those involved in conducting such studies. Individual papers are processed separately for the Energy Data Base.

  18. Nuclear Power in Space

    Science.gov (United States)

    1994-01-01

    In the early years of the United States space program, lightweight batteries, fuel cells, and solar modules provided electric power for space missions. As missions became more ambitious and complex, power needs increased and scientists investigated various options to meet these challenging power requirements. One of the options was nuclear energy. By the mid-1950s, research had begun in earnest on ways to use nuclear power in space. These efforts resulted in the first radioisotope thermoelectric generators (RTGs), which are nuclear power generators build specifically for space and special terrestrial uses. These RTGs convert the heat generated from the natural decay of their radioactive fuel into electricity. RTGs have powered many spacecraft used for exploring the outer planets of the solar system and orbiting the sun and Earth. They have also landed on Mars and the moon. They provide the power that enables us to see and learn about even the farthermost objects in our solar system.

  19. Yeast nuclear RNA processing

    Institute of Scientific and Technical Information of China (English)

    Jade; Bernstein; Eric; A; Toth

    2012-01-01

    Nuclear RNA processing requires dynamic and intricately regulated machinery composed of multiple enzymes and their cofactors.In this review,we summarize recent experiments using Saccharomyces cerevisiae as a model system that have yielded important insights regarding the conversion of pre-RNAs to functional RNAs,and the elimination of aberrant RNAs and unneeded intermediates from the nuclear RNA pool.Much progress has been made recently in describing the 3D structure of many elements of the nuclear degradation machinery and its cofactors.Similarly,the regulatory mechanisms that govern RNA processing are gradually coming into focus.Such advances invariably generate many new questions,which we highlight in this review.

  20. Communication in nuclear emergency

    Energy Technology Data Exchange (ETDEWEB)

    Nozawa, Masao [Research Organization for Information Science and Technology, Tokai, Ibaraki (Japan)

    1996-12-01

    In order to take protection measures smoothly at the time of emergency in nuclear power stations and others, it is necessary to prepare information communication facilities mutually among disaster prevention organizations including the state and information transmission network for residents in surrounding areas. The matters decided in ``the measures to be taken for the time being for the countermeasures to prevent disaster in nuclear power stations and others`` are shown. In order to avoid the congestion of communication, the exclusively used communication systems are adopted for disaster prevention organizations, in which facsimile is used to transmit graphic information. The data communication circuits for distributing SPEEDI are installed between Science and Technology Agency, Nuclear Power Safety Technology Center and respective prefectures. The routes, means and order of notices must be confirmed beforehand mutually among the related organizations. As to the general communication for disaster countermeasures, the communication systems in ministries and agencies are described. (K.I.)