Some lessons learned from the development and updating processes of the probabilistic safety assessments of Daya Bay nuclear power plant

The quality of probabilistic safety assessment (PSA) should be commensurate with the application for which it is intended and the role the PSA results play in the integrated decision making process. The updating of the PSA model would be ineffective if it is not initiated according to the requirements of the applications. This paper summarizes the lessons learned from the PSA development and updating processes in Daya Bay Nuclear Power Plant (NPP) in China. While some of the issues are specific, the discussion of these quality issues will be helpful to the NPPs in China and maybe in other countries.