摘要
常规岛除盐水分配(SER)系统水罐是核电厂厂区最大的露天罐体,超强台风情况下可能会受风致飞射物的影响而被破坏。为评估超强台风情况下SER水罐对机组安全的影响,采用概率安全评价(PSA)方法,结合典型的事故序列,开展了分析。在定性分析超强台风导致的始发事件和所需缓解功能的基础上,通过计算SER水罐在不同台风情况下由飞射物导致的失效概率,建立飞射物PSA模型,从事故缓解功能和机组总体风险贡献两方面开展了定量评价。根据分析结果,建议运行电厂通过改造和管理,新建电厂通过设计改进,提高SER水罐的防抗飞射物能力。
The tank of Conventional Island Demineralized Water Distribution(SER) system is the largest open air tank of nuclear power plant and may be damaged by wind-induced missiles under super typhoon. In order to evaluate the impact on safety of SER tank under super typhoon, an analysis using probabilistic safety assessment(PSA) method based on typical accident sequences is carried out. On the basis of qualitative analysis of initiating events and mitigation functions required, the missile PSA model is established with calculation of failure probabilities of SER tank under different typhoon conditions. The quantitative evaluation is carried out from the aspect of accident mitigation and overall risk of unit. Improvement suggestions are proposed according to the result.
作者
冯丙辰
王晗丁
张晓明
Feng Bingchen;Wang Handing;Zhang Xiaoming(Suzhou Nuclear Power Research Institute Co.,Ltd,Shenzhen 518000,China)
出处
《核安全》
2022年第4期55-58,共4页
Nuclear Safety
