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Tipo: report
Título: Calculation memory of equivalent diameters along the natural circulation path of the cafe capsule
Autor(es): Botelho, David Adjuto
Resumo: In this report we present the calculation of equivalent diameters and other geometric data employed for the one-dimensional simulation model of the external cooling by natural circulation, of the decay heat generated inside the pressure tube of the CAFÉ capsule. This capsule is designed by the Centro de Desenvolvimento de Tecnologia Nuclear Nuclear (CDTN) for Centro de Tecnologia da Marinha in São Paulo (CTM-SP). It will be irradiated in a reflector channel of the pool reactor located in the Instituto de Pesquisas Energética e Nucleares (IPEN). In a postulates accident in the reactor on in the capsule, the capsule would be taken out of its irradiation channel being, transferred to the reactor open pool for cooling. In this situation, the forced flow cases to be fed into its heated riser, which in the channel between th outer surface of the pressure tube and the barrel of a so-called flow diverging tube. Thus, the natural circulation developed has the following path: from the heated riser the flow goes to the in heated riser, the extensor tube (upper plenum) and the hot leg tube that discharges the cooling water into the pool of the reactor. By gravity the pool water enters the cold downcomer located between the extensor tube and the external tube, and flows through the other downcomer located between the flow diverging tube and the external tube. The pool water directly cools the external tube.
Palavras-chave: Natural circulation
Irradiation capsule
Idioma: eng
País: Brasil
Editor: Instituto de Engenharia Nuclear
Sigla da Instituição: IEN
Tipo de Acesso: restrictAccess
Data do documento: Dez-2002
Aparece nas coleções:Outras produções: Relatórios

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