深水池式反应堆内部事件安全风险分析评价  

Internal Events Safety Risk Assessment of Deep Pool Type Reactor

作　　者：杨晨[1] 柯国土[2] 王静[1] 颜寒[1] Yang Chen;Ke Guotu;Wang Jing;Yan Han(Department of Nuclear Engineering Design,China Institute of Atomic Energy,Beijing 102413,China;China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院核工程设计研究所,北京102413 [2]中国原子能科学研究院,北京102413

出　　处：《科技通报》2024年第9期107-110,122,共5页Bulletin of Science and Technology

基　　金：国家重点研发计划(2016YFC142500);北京市自然科学基金项目(3172032);中国原子能科学研究院项目(2017-434)。

摘　　要：深水池式反应堆系统简单,固有安全性高,可用于居民供热,实现节能减排。为提升经济性,贴近居民区建设,需通过概率安全分析(probabilistic safety assessment,PSA)定量评价其安全风险。由于其独特的安全特性,其事故进程缓慢、事故后果轻、人工干预机会充足,因此在进行PSA分析时需作出针对性考虑。本文对典型深水池式反应堆开展内部事件安全风险评价,在评价过程中对分析假设、终态划分、结果分析等方面进行了适应性调整。基于分析与评价,计算得到反应堆总的堆芯损坏频率为2.13E-09/堆年,体现了池式低温供热堆优良的安全特性。基于定量化结果还进行了最小割集分析、人工干预时间对CDF(core damage frequency)的影响分析,并根据分析结果给出风险见解与建议。The deep pool type reactor system is simple and has high inherent safety,which can used for residential heating and realize energy conservation and emission reduction.In order to improve the economy and close to the residential areas,it is necessary to quantitatively evaluate the safety risks through PSA(probabilistic safety assessment).Due to the unique safety characteristics of deep pool type reactor,the accident process improves slowly,and the opportunity for human intervention is sufficient.Therefore,targeted consideration should be taken when performing PSA.In this paper,the level 1 probabilistic safety assessment of internal events is carried out for a typical deep pool type reactor,and the analysis assumptions,final state division,result analysis and other aspects are adjusted adaptively in the assessment process.According to the analysis and evaluation,the total core damage frequency is 2.13E-09/reactor year,showing the excellent safety characteristics of pool type low temperature heating reactor.Based on the quantitative results,the MCS(minimal cut set)analysis and the impact of human intervention time on CDF(core damage frequency)are also carried out,and the risk opinions and suggestions are given according to the analysis results.

关 键 词：池式低温供热堆 概率安全分析 事件序列 风险评价 

分 类 号：X837[环境科学与工程—环境工程]