Seismic margin reviews of nuclear power plants: Identification of important functions and systems

Abstract A study of the results of several seismic PRAs was performed to develop a screening approach for the assessment of the seismic margin of nuclear power plants. This screening approach combines both systems insights and fragility information to simplify the margin review process. The purpose of this paper is to present the basis and method used for the development of the systems screening portion of the seismic margin review methodology.