Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
This paper introduces the practical experience of risk-informed technology in China. Taking a pressurized water reactor nuclear power plant in China as an example, aiming at the problems and risks existing in the periodic test one cycle of pilot operated safety valve (SEBIM valve) of Residual Heat Removal (RHR) system of nuclear power plant, and according to the essence of risk-informed technology, a plan for optimizing the periodic test cycle is proposed. This paper mainly discusses the application of risk-informed technology in the periodic test cycle of SEBIM valve in RHR system of nuclear power plant by using the combination of determinism and probability theory. The results show that the extended periodic test cycle of SEBIM valve in RHR system meets the requirements of relevant regulations and guidelines, and the risk introduced by optimization is small and acceptable, which verifies the feasibility of the optimization scheme, and points out the degree of influence of long-term performance monitoring of valves on the optimization scheme, so as to support the comprehensive decision-making of nuclear power plants.
