Internal Events Level I PSA Accident Sequence Quantification for Point Lepreau Refurbishment Project

Abstract

A Probabilistic Safety Assessment (PSA) for Point Lepreau Generating Station is planned as part of the plant Refurbishment (PLR) Project. The main objective of this PSA is to provide insights into plant safety design and performance, including the identification of dominant risk contributors and the comparison of options for reducing risk. A significant component of this PSA was recently completed, the Level I Accident Sequence Quantification (ASQ) for internal events (at full power and shutdown). The objective of Level I ASQ is to determine the overall Severe Core Damage Frequency (SCDF) that results from a system, structure or component failure or human error. This paper describes the major steps in performing Level I ASQ for internal events and discusses the key results of this study. The results presented in this paper are interim as this study has not completed the formal review process.