三代压水堆核电厂稳压器快速卸压系统功能扩展研究  

Study on Function Extension of Pressurizer Fast Depressurization System for GenⅢPWR NPPs

作　　者：张佳佳 邓伟 肖军 宫宇 Zhang Jiajia;Deng Wei;Xiao Jun;Gong Yu(Nuclear and Radiation Safety Center,Ministry of Ecology and Environment of the People's Republic of China,Beijing,102488,China;China Nuclear Power Engineering Co.,Ltd.,Beijing,100840,China)

机构地区：[1]生态环境部核与辐射安全中心,北京102488 [2]中国核电工程有限公司,北京100840

出　　处：《核动力工程》2021年第5期162-166,共5页Nuclear Power Engineering

摘　　要：我国某三代压水堆核电厂设置了稳压器快速卸压系统用于严重事故下一回路快速卸压,本文以该核电厂为研究对象,基于概率安全分析(PSA)应用于核电厂设计改进中的一般方法和流程,围绕将稳压器快速卸压系统功能扩展到一回路充排卸压操作,作为稳压器安全阀卸压备用手段这一改进方案,开展PSA建模分析和可行性评价及论证。结果表明,这一改进方案可以大幅度降低核电厂的堆芯损伤频率,且未新增负面效应,是可行的,可予以实施。建议核电厂充分挖掘现有系统设备潜能,进一步提高核电厂的安全性和经济性。A nuclear power plant of GenⅢpressurized water reactor(PWR)in China has installed the pressurizer fast depressurization system for fast depressurization of the primary loop under severe accidents.With respect to this NPP,according to the general method and process of applying the probabilistic safety assessment(PSA)to the NPP design improvement,this study,focusing on the improvement plan of extending the pressurizer fast depressurization system function to the primary feed&bleed for depressurization to enable the use of this system as a standby pressure relief measure for the pressurizer safety valve,performs the PSA modeling and the feasibility evaluation and demonstration.Finally,this study shows that the improvement plan can reduce the core damage frequency of a NPP greatly,without any new negative effect,so the plan is feasible and can be implemented.Consequently,the NPPs should fully tap the potential of existing system equipment to further improve the safety and economical efficiency of NPPs.

关 键 词：三代压水堆 核电厂 快速卸压系统 概率安全分析 功能扩展 

分 类 号：TL364.5[核科学技术—核技术及应用]