CFD analysis of blockage length on a partially blocked fuel rod
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Resumo
In LOCA accidents, fuel rods may balloon by the increasing of pressure difference
between fuel rod and core vessel. With the balloon effect, the swelling can partially
block the flow channel, affecting the coolability during reflood phase. In order to analyze
the influence of blockage length after LOCA events, many numerical simulations
using Ansys-CFX code have been done in steady state condition, characterizing the
final phase of reflood. Peaks of temperature are observed in the middle of the fuel
rod, followed by a temperature drop. This effect is justified by the increasing of heat
transfer coefficient, originated from the high turbulence effects. Therefore, this paper
considers a radial blockage of 90%, varying just the blockage length. This study
observed that, for the same boundary conditions, the longer the blockage length originated after LOCA events, the higher are the central temperatures in the fuel
rod.
Como referenciar
SCURO, N.L.; ANGELO, G.; ANGELO, E.; ANDRADE, D.A. CFD analysis of blockage length on a partially blocked fuel rod. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 60-61. Disponível em: http://repositorio.ipen.br/handle/123456789/28759. Acesso em: 30 Dec 2025.
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.