Level 1 Internal Flood PSA Accident Sequence Quantification for Point Lepreau Refurbishment Project

Abstract

A Probabilistic Safety Assessment (PSA) for Point Lepreau Generating Station has been completed as part of the plant Refurbishment 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 compare options for reducing risk. The scope of this assessment covers Level 1 and 2 PSA and includes internal events during full power and shutdown, internal fires and internal floods as well as a PSA-based seismic events margin assessment for full power operation. This paper describes the major steps in the Level 1 analysis for internal flood events and discusses the key results of this study.