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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제2호
발행연도
2019.1
수록면
600 - 606 (7page)

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Studies on the application of the lead rubber bearing (LRB) isolation system to nuclear power plants arebeing carried out as one of the measures to improve seismic performance. Nuclear power plants withisolation systems require seismic probabilistic safety assessments, for which the seismic fragility of thestructures, systems, and components needs be calculated, including for beyond design basis earthquakes. To this end, seismic response analyses are required, where it can be seen that the behaviors of theisolation system components govern the overall seismic response of an isolated plant. The numericalmodel of the LRB used in these seismic response analyses plays an important role, but in most cases, theextreme performance of the LRB has not been well studied. The current work therefore develops anextreme nonlinear numerical model that can express the seismic response of the LRB for beyond designbasis earthquakes. A full-scale LRB was fabricated and dynamically tested with various input conditions,and test results confirmed that the developed numerical model better represents the behavior of the LRBover previous models. Subsequent seismic response analyses of isolated nuclear power plants using themodel developed here are expected to provide more accurate results for seismic probabilistic safetyassessments.

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