Effect of neutron irradiation embrittlement on cyclic hardening behavior of core shroud assembly in pressurized water reactor under beyond-design basis earthquake

Jong Sung Kim, Jun Min Seo, Yun Jae Kim, Young In Choi, Chang Sik Oh, Yong Beum Kim

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This paper presents investigation results on effect of neutron irradiation embrittlement on cyclic hardening behavior of core shroud assembly in pressurized water reactor under beyond-design basis earthquake (BDBE). In order to simulate the cyclic hardening behavior considering the neutron irradiation embrittlement, the previous user subroutines developed for monotonic hardening behavior were updated based on some cyclic hardening test results of irradiation-simulated specimens. Finite element (FE) elastic-plastic seismic analysis was performed by using Chaboche combined hardening models considering cyclic hardening or cyclic softening and a bi-linear kinematic hardening model. As a result, it is found that the bi-linear kinematic hardening model derived the most conservative results, and the Chaboche combined hardening model considering cyclic softening derived the analysis results close to those of the bi-linear kinematic hardening model. In addition, variation of the FE elastic-plastic seismic analysis results vs. neutron irradiation dose was investigated using the bi-linear kinematic hardening model. Finally, it is identified that von-Mises effective stress and plastic strain energy increase and equivalent plastic strain decreases with increasing the neutron irradiation dose.

本文言語English
ホスト出版物のタイトル9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019
編集者Alberto D'Amore
出版社American Institute of Physics Inc.
ISBN(電子版)9780735419476
DOI
出版ステータスPublished - 2019 12 12
イベント9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019 - Ischia, Naples, Italy
継続期間: 2019 9 122019 9 14

出版物シリーズ

名前AIP Conference Proceedings
2196
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

Conference9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019
国/地域Italy
CityIschia, Naples
Period19/9/1219/9/14

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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