Summary of Collecting and Processing Methods for Common Cause Failure Data of PSA Components in Nuclear Power Plant

In order to ensure the safety of nuclear power plant, the engineering facilities closely related to safety are often redundant systems. However, through the probabilistic safety assessment (PSA) analysis, it is found that common cause failure is the main cause of system failure and has a significant contribution to the unavailability of safety system. Therefore, common cause failure analysis and data collection of component are very important. This paper introduces the collection method and process of component common cause failure data based on PSA model of nuclear power plant, discusses the problems encountered in the data collection process, and puts forward suggestions for the follow-up data collection work.