宁边5 MWe石墨堆核事故跨国紧急情况分析北大核心CSCD

朝鲜宁边地区有1座正在运行的5 MWe石墨反应堆。如果发生核事故,我国可能因放射性环境释放影响不得不采取应急响应行动,因此需要作出适当的应急准备。基于有限信息,从国际应急计划区和距离、切尔诺贝利核事故跨国应急实践两方面分析了宁边5 MWe石墨堆核事故跨国紧急情况。分析结果表明:我国领土不太可能在宁边5 MWe石墨堆应急计划区和应急距离以内;我国对其核事故跨国紧急情况的应急准备重点是当地食品和贸易限制。     

Consequence analysis for nuclear reactors,Yongbyon

Since the Fukushima nuclear power plant accidents in 2011, there have been an increased public anxiety about the safety of nuclear power plants in Korea. The lack of safeguards and facility aging issues at the Yongbyon nuclear facilities have increased doubts. In this study, the consequence analysis for the 5-MWe graphite-moderated reactor in North Korea was performed. Various accident scenarios including accidents at the interim spent fuel pool in the 5-MWe reactor have been developed and evaluated quantitatively. Since data on the design and safety system of nuclear facilities are currently insufficient, the release fractions were set by applying the alternative source terms made for utilization in the analysis of a severe accident by integrating the results of studies of severe accidents occurred before. The calculation results show the early fatality zero deaths and latent cancer fatality about only 13 deaths in Seoul. Thus, actual impacts of a radiological release will be psychological in terms of downwind perceptions and anxiety on the part of potentially exposed populations. Even considering the simultaneous accident occurrence in both 5-MWe graphite-moderated reactor and 100-MWt light water reactor, the consequence analysis using the MACCS2 code shows no significant damage to people in South Korea.