Research and Practice of Living PSA Maintenance Methods

In the technical policy for configuration risk management of nuclear power plants (Trial), it is clearly required to use the active probabilistic safety analysis model to carry out configuration risk management. Living PSA is not a new concept independent of PSA, but a higher requirement for PSA, to ensure that PSA truly reflects the design and operation characteristics of nuclear power plant, and truly reflects the risk of nuclear power plant. The development and maintenance of living PSA involves all aspects of nuclear power plant and requires close cooperation of multiple departments. Therefore, the construction of living PSA system requires not only reasonable maintenance methods, but also appropriate organization and quality assurance support. Based on this point, this paper introduces the basic concept, content and development status at home and abroad of living PSA, studies the maintenance methods of living PSA, and puts forward the common problems and development direction in the maintenance process of living PSA in combination with the actual process and mode in the application process of CGN group, which has reference significance for the development of PSA model maintenance strategy, configuration risk management and maintenance rules.