Comparison between RELAP5 versions for a two-phase natural circulation analysis
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
RELAP5 is one of the most used numerical tools to predict thermal-hydraulic and neutronic phenomena in
nuclear reactors. RELAP5-3D is the latest version of this software family, but RELAP5-mod3 is still widely
used in Brazilian research institutes and it is also used as benchmark for several nuclear applications. Among
these applications, the use of passive heat transfer mechanisms, such as natural circulation, has drawn attention
of several studies, especially after the Fukushima-Daiichi accident. Considering this aforementioned aspect, this
study proposes a comparison of RELAP5-3D and RELAP5-mod3 versions, focusing on a two-phase natural
circulation loop. For comparison purposes, an experimental data set is part of the analysis. Results showed that
during the single-phase regime, the temperature difference between versions is negligible. However, when the
two-phase flow regime takes place, different wavelengths and amplitudes of flow instabilities were obtained for
each version. When compared to the experimental data set, the RELAP5-3D version provided the best
prediction results.
Como referenciar
BRAZ FILHO, FRANCISCO A.; RIBEIRO, GUILHERME B.; SABUNDJIAN, GAIANE; CALDEIRA, ALEXANDRE D. Comparison between RELAP5 versions for a two-phase natural circulation analysis. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28178. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.