PRA Quality in Risk-Informed Application of Nuclear Power Plant

Based on the technology of PRA that was moved forward to use in the nuclear power plant by the United States Nuclear Regulatory commission（NRC）,this paper introduced the meanings of PRA quality,the phased approach to improve the PRA quality in the U.S.NRC,and the background of the regulatory guides.Combined with the status of PRA applications in China,an acceptable method to improve the PRA quality is proposed.