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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019
EditorsAlberto D'Amore
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419476
DOIs
Publication statusPublished - 2019 Dec 12
Event9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019 - Ischia, Naples, Italy
Duration: 2019 Sep 122019 Sep 14

Publication series

NameAIP Conference Proceedings
Volume2196
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kim, J. S., Seo, J. M., Kim, Y. J., Choi, Y. I., Oh, C. S., & Kim, Y. B. (2019). Effect of neutron irradiation embrittlement on cyclic hardening behavior of core shroud assembly in pressurized water reactor under beyond-design basis earthquake. In A. D'Amore (Ed.), 9th International Conference on Structural Analysis of Advanced Materials, ICSAAM 2019 [020033] (AIP Conference Proceedings; Vol. 2196). American Institute of Physics Inc.. https://doi.org/10.1063/1.5140306