SEISMIC RESPONSE ANALYSIS OF REACTOR BUILDING AND EQUIPMENT WITH HAZARD CONSISTENT GROUND MOTIONS USING A 3D-FE MODEL

摘要

Research and development on next-generation seismic probabilistic risk assessment (PRA) by using 3D vibration simulators is ongoing to evaluate the seismic safety performance of nuclear plants with high reliability. Most structural PRA uses probabilistic schemes such as the scheme that uses probabilistic seismic hazard and fragility curves. Even when earthquake ground motions are required in Monte Carlo Simulations (MCS), they are generated to fit the specified response spectra, such as uniform hazard spectra at a specified exceedance probability. However, these ground motions are not directly linked with their corresponding seismic source characteristics. In this context, the authors propose a methodology based on MCS to reproduce a set of input ground motions to develop an advanced PRA scheme. This advanced scheme can explain the exceedance probability and sequence of functional loss in a nuclear power plant. This paper reports the methodology to reproduce a set of input ground motions and the analytical results of a nuclear plant building using those input ground motions.