Modification of fuel performance code to evaluate iron-based alloy behavior under loca scenario
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Accident tolerant fuels (ATF) has been studied since the Fukushima Daiichi accident in the research efforts to
develop new materials which under accident scenarios could maintain the fuel rod integrity for a longer period
compared to the cladding and fuel system usually utilized in Pressurized Water Reactors (PWR). The efforts
have been focused on new materials applied as cladding, then iron-base alloys appear as a possible candidate.
The aim of this paper is to implement modifications in a fuel performance code to evaluate the behavior of ironbased
alloys under Loss-of-Coolant Accident (LOCA) scenario. For this, initially the properties related to the
thermal and mechanical behavior of iron-based alloys were obtained from the literature, appropriately adapted
and introduced in the fuel performance code subroutines. The adopted approach was step by step modifications,
where different versions of the code were created. The assessment of the implemented modification was carried
out simulating an experiment available in the open literature (IFA-650.5) related to zirconium-based alloy fuel
rods submitted to LOCA conditions. The obtained results for the iron-based alloy were compared to those
obtained using the regular version of the fuel performance code for zircaloy-4. The obtained results have shown
that the most important properties to be changed are those from the subroutines related to the mechanical
properties of the cladding. The results obtained have shown that the burst is observed at a longer time for fuel
rods with iron-based alloy, indicating the potentiality of this material to be used as cladding with ATF purposes.
Como referenciar
GIOVEDI, CLAUDIA; ABE, ALFREDO; MUNIZ, RAFAEL O.R.; GOMES, DANIEL de S.; SILVA, ANTONIO T. e; MARTINS, MARCELO R. Modification of fuel performance code to evaluate iron-based alloy behavior under loca scenario. 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/123456789/28187. Acesso em: 20 Mar 2026.
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