关键词: 核电厂, 职业照射, 集体剂量, 大修剂量

Abstract: The annual dose and collective dose during planned outage of China’s operational nuclear power units from 2018 to 2023 were compiled, summarized, and analyzed based on different reactor types. It was observed that the collective dose for HPR1000, AP1000, VVER, and CNP600 units remained relatively low. Moreover, the average collective dose during planned outage for CNP600, VVER, and AP1000 units also exhibited a low level. By comparing the collective doses at global reactor units with data from World Association of Nuclear Operators (WANO), it was determined that China’s single reactor unit collective dose is equivalent to that of the United States but surpasses France in terms of performance. Considering radiation protection practices across various reactor types in operation, it is necessary to further promote reasonable and feasible measures for reducing doses while comprehensively strengthening risk control in high-radiation areas. Additionally, continuous improvement in task-oriented occupational exposure management should be pursued to enhance international competitiveness of Chinese nuclear power units and facilitate the transformation into a leading force in the industry.

Key words: nuclear power plants, occupational exposure, collective dose, collective dose during planned outage