Failure simulation of nuclear pressure vessel under severe accident conditions: Part II - Failure modeling and comparison with OLHF experiment

This paper proposes strain-based failure model of A533B1 pressure vessel steel to simulate failure, followed by application to OECD lower head failure (OLHF) test simulation for experimental validation. The proposed strain-based failure model uses simple constant and linear functions based on physic...

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Published inNuclear engineering and technology Vol. 55; no. 11; pp. 4134 - 4145
Main Authors Eui-Kyun Park, Jun-Won Park, Yun-Jae Kim, Yukio Takahashi, Kukhee Lim, Eung Soo Kim
Format Journal Article
LanguageKorean
Published 2023
Subjects
Strain based failure model
Validation using OLHF test
Failure prediction of nuclear pressure vessel
Severe accident condition
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Summary:This paper proposes strain-based failure model of A533B1 pressure vessel steel to simulate failure, followed by application to OECD lower head failure (OLHF) test simulation for experimental validation. The proposed strain-based failure model uses simple constant and linear functions based on physical failure modes with the critical strain value determined either using the lower bound of true fracture strain or using the average value of total elongation depending on the temperature. Application to OECD Lower Head Failure (OLHF) tests shows that progressive deformation, failure time and failure location can be well predicted.
Bibliography:KISTI1.1003/JNL.JAKO202311443244327
ISSN:1738-5733
2234-358X