The Research and Application of Configuration Risk Management in Daya Bay NPP

National Nuclear Safety Administration issuance “The Technical Policy of Nuclear Power Plant Configuration Risk Management” in December 2019 to support the risk management of multiple system/equipment failures and the flexible operation of nuclear power plant (NPP). Subsequently, Suzhou Nuclear Power Research Institute PSA teams and Daya Bay NPP nuclear safety advisory/Operation operator/planning Engineer established a joint project team to study the implementation of configuration risk management. The configuration risk management system framework and operation process have been determined through the in-depth discussion of multiple disciplines and departments, and the trial operation of risk management system has been started in January 2021 to optimize iterative software and implementation processes. This paper introduces the composition of Daya Bay configuration risk management system, the responsibilities of each discipline in the implementation of configuration risk management, the establishment method and results of risk threshold and risk management matrix, the functions of operation and maintenance risk assessment tools, the characteristics of risk calculation engine, the implementation process of operation configuration risk management and maintenance configuration risk management, the problems found during the trial operation, the management measures for subsequent upgrades, so as to provide reference for other NPPs to carry out the configuration risk management.