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Amorim, E.S. do; Castro Lobo, P.D. de.
Centro Tecnico Aeroespacial, Sao Jose dos Campos (Brazil). Inst. de Atividades Espaciais1980
Centro Tecnico Aeroespacial, Sao Jose dos Campos (Brazil). Inst. de Atividades Espaciais1980
AbstractAbstract
[en] A reduction of computing effort was achieved as a result of the application of space - independent continuous slowing down theory in the spectrum averaged cross sections and further expressing then in a quadratic corelation whith the temperature and the composition. The decoupling between variables that express some of the important nuclear characteristics allowed to introduce a sensitivity analyses treatment for the full prediction of the behavior, over the fuel cycle, of the LMFBR considered. As a potential application of the method here in developed is to predict the nuclear characteristics of another reactor, face some reference reactor of the family considered. Excellent agreement with exact calculation is observed only when perturbations occur in nuclear data and/or fuel isotopic characteristics, but fair results are obtained whith variations in system components other than the fuel. (Author)
[pt]
Uma reducao no esforco de maquina e obtido atraves da aplicacao da teoria da moderacao continua independente do espaco no calculo das secoes de choque medias, e, a seguir, expressas atraves de correlacoes quadraticas envolvendo a temperatura e a composicao. O desacoplamento entre as variaveis, que traduzem algumas caracteristicas nucleares, permitiu a utilizacao da analise de sensitividade na avaliacao do comportamento de um reator LMFBR ao longo do ciclo do combustivel e, em consequencia, avaliar as caracteristicas nucleares de um reator nuclear face a um outro reator da mesma familia considerado como referencia. Resultados satisfatorios foram obtidos quando as perturbacoes introduzidas referiram-se as constantes nucleares e/ou concentracoes isotopicas, porem certas divergencias serao obtidas quando forem introduzidas outras variacoes no sistema do que aquelas associadas ao combustivel. (Autor)Original Title
Investigacao preliminar do ciclo de combustivel em reatores rapidos atraves do metodo das correlacoes e analise de sensitividade das caracteristicas nucleares
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Nov 1980; 44 p
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