Abstract: After the Fukushima nuclear accident, more and more attention has been paid to the public radiation risk assessment of NPPs. With the “going out” initiative of China’s independently developed GEN-III technology HPR1000, Argentine Atomic Energy Commission and other foreign regulatory agencies have clearly requested to carry out level-3 PSA for NPPs. Public radiation risk assessment has been an important indicator to judge whether the plant safe or not. Combined with the level-2 PSA source terms, demographic, meteorological and topographic data, using the self-developed accident consequence assessment code based on the CALPUFF model, personnel exposure dose and radiation risk at different distances from the NPP site are quantitatively simulated. The results show that the public radiation risk after serious accidents is lower than 10^-8/a, which meets the relevant requirements of criteria in Argentina, the United States and the United Kingdom, etc. This paper provides technical support for the safety review of HPR1000 technology, and promotes the safe and effective global deployment of HPR1000. Meanwhile, suggestions have been made for regulatory authorities to formulate quantitative risk acceptance criteria.

Key words: level-3 PSA, risk assessment, accident consequence, HPR1000