SEISMIC MARGIN ANALYSIS AND ASSESSMENT FOR CPR1000 NUCLEAR ISLAND BUILDINGS

After Fukushima nuclear accident in Japan，National Nuclear Safety Administration ( NNSA) in China issued requirements that nuclear power plants including of operation and construction must carry out Seismic Margin Assessment ( SMA) ． It is certainly difficult to do it by reason of using SMA method in China as the first time． Aiming at the CＲP1000 nuclear plant structure，the article used method of EPＲI to evaluate seismic margin，which included review level earthquake ( ＲLE) selection，site walk-down，and analysis of high confidence of low probability of failure ( HCLPF) value． Which could help well for SMA of nuclear power plants including of operation and construction，and it was also proposed several suggestions on analysis method and possible weak link treatment．