Analysis of different quantitative safety goals for nuclear power plants

초록

As the multi-unit risks or site-level risks from nuclear power plants receive a lot of attention after Fukushima accident, the discussions on the safety goals for multiple units of nuclear power plants or a nuclear power plant site are gradually emerging. Safety goals are closely related to the results of probabilistic safety assessment (PSA), and different levels of PSA results are used for quantitative safety goals in different countries. Safety goals in the form of prompt and cancer fatality risks are set so that those from nuclear power generation should be less than those from other forms of risks in the society, and the results of Level 3 PSA are compared with such quantitative safety goals. Safety goals in the form of large release frequency (LRF) are set to prevent land contamination nearby nuclear power plants so that large-scale relocation of population can be avoided, and the results of Level 1 or 2 PSA are compared with such quantitative safety goals. When different quantitative safety goals are used together, it is evident that those safety goals need to be consistent to each other. This paper reviews these quantitative safety goals and confirms the relation among them. © 2018 International Association for Probablistic Safety Assessment and Management (IAPSAM). All rights reserved.

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