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논문 기본 정보

자료유형
학술저널
저자정보
김승현 (한국전력기술) 김연정 (한국전력기술) 이한걸 (한국전력기술) 강선예 (한국전력기술)
저널정보
한국압력기기공학회 한국압력기기공학회 논문집 한국압력기기공학회 논문집 제18권 제1호
발행연도
2022.6
수록면
19 - 25 (7page)

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초록· 키워드

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Nuclear Power Plants (NPP) should be designed to have sufficient safety margins and to ensure seismic safety against earthquake that may occur during the plant life time. After the 9.12 Gyeongju earthquake accident, the structural integrity of nuclear power plants due to the beyond design basis earthquake is one of key safety issues. Accordingly, it is necessary to conduct structural integrity evaluations for domestic NPPs under beyond design basis earthquake. In this study, the Level 3 LBB (Leak Before Break) evaluation was performed by considering the beyond design basis earthquake for the surge line of a OPR1000 plant of which design basis earthquake was set to be 0.2g. The beyond design basis earthquake corresponding to peak ground acceleration 0.4g at the maximum stress point of the surge line was considered. It was confirmed that the moment behaviors of the hot leg and pressurized surge nozzle were lower than the maximum allowable loading in moment-rotation curve. It was also confirmed that the LBB margin could be secured by comparing the LBB margin through the Level 2 method. It was judged that the margin was secured by reducing the load generated through the compliance of the pipe.

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ABSTRACT
1. 서론
2. 설계초과지진을 고려한 LBB 평가
3. 해석결과
4. 결론
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