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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제2호
발행연도
2019.1
수록면
561 - 572 (12page)

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In the design criterion for the nuclear power plant piping system, the limit state of the piping against anearthquake is assumed to be plastic collapse. The failure of a common piping system, however, means theleakage caused by the cracks. Therefore, for the seismic fragility analysis of a nuclear power plant, amethod capable of quantitatively expressing the failure of an actual piping system is required. In thisstudy, it was conducted to propose a quantitative failure criterion for piping system, which is required forthe seismic fragility analysis of nuclear power plants against critical accidents. The in-plane cyclic loadingtest was conducted to propose a quantitative failure criterion for steel pipe elbows in the nuclear powerplant piping system. Nonlinear analysis was conducted using a finite element model, and the resultswere compared with the test results to verify the effectiveness of the finite element model. The collapseload point derived from the experiment and analysis results and the damage index based on the stressstrainrelationship were defined as failure criteria, and seismic fragility analysis was conducted for thepiping system of the BNL (Brookhaven National Laboratory) - NRC (Nuclear Regulatory Commission)benchmark model.

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