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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.12
- 수록면
- 2,887 - 2,900 (14page)
- DOI
- https://doi.org/10.1016/j.net.2020.05.015
이용수
초록· 키워드
오류제보하기
Cladding failure in a fuel rod during operation in a BWR is analyzed using a FALCON code-based model.
Comparative calculation with a neighbouring, intact rod is presented, as well. A considerable ‘hot spot’effect in cladding temperature is predicted with the SLICE-DO model due to a thermal barrier caused bythe localized crud deposition. Particularly significant overheating is expected to occur on the affectedside of the cladding of the failed rod, in agreement with signs of significant localized crud deposition asrevealed by Post Irradiation Examination. Different possibilities (criteria) are checked, and PelletCladding Mechanical Interaction (PCMI) is shown to be one of the plausible potential threats. It isshown that PCMI could lead to discernible concentrated inelastic deformation in the overheated part ofthe cladding. None of the specific mechanisms considered can be experimentally or analytically identified as an only cause of the rod failure. However, according to the current calculation, a possibility ofcladding failure by PCMI cannot be excluded if the crud thickness exceeded 300 mm.
s
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