Abstract
Risk informed in-service inspection (RI-ISI) is one of the most successful applications of probabilistic safety analysis techniques, RI-ISI has been implemented in a large number of operating power plants at home and abroad, Under the premise of ensuring safety, the dose of radiation for staff is reduced for nuclear power plants, reducing the economic burden. However, RI-ISI is a gap in the design phase of nuclear power plants. In this paper, the method of RI-ISI optimization of nuclear power plants at the design stage is studied, and the pipeline in-service inspection scheme of HPR1000 TFA/TFM/PRS/PCS system is optimized by using the RI-ISI method. Through qualitative analysis and quantitative calculation of RI-ISI risk consequences, the in-service inspection optimization scheme of the studied system is given, which effectively ensures the safety of nuclear power plants while reducing the task volume and time cost of in-service inspection work, effectively reducing the irradiation dose of in-service inspection staff, and bringing greater economic benefits to nuclear power plants.
