非能动脉冲冷却系统对压水堆SBO/TLFW事故的缓解作用分析  

Analysis of Mitigation Effect of Passive Pulse Cooling System on SBO/TLFW Accident in PWR

作　　者：吴震华 唐琪[3] 李伟[4] 许俊俊 段倩妮 武俊梅[4] Wu Zhenhua;Tang Qi;Li Wei;Xu Junjun;Duan Qianni;Wu Junmei(Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou,Jiangsu,215004,China;National Engineering Research Center for Nuclear Power Plant Safety&Reliability,Suzhou,Jiangsu,215004,China;Daya Bay Nuclear Power Operations and Management Co.,Ltd.,Shenzhen,Guangdong,518124,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an,710049,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004 [2]国家核电厂安全及可靠性工程技术研究中心,江苏苏州215004 [3]大亚湾核电运营管理有限责任公司,广东深圳518124 [4]西安交通大学复杂服役环境重大装备结构强度与寿命全国重点实验室,西安710049

出　　处：《核动力工程》2024年第3期179-185,共7页Nuclear Power Engineering

摘　　要：针对二代堆核电厂目前的事故规程难以处理全厂失电(SBO)与完全丧失给水(TLFW)事故叠加的情况(SBO/TLFW),非能动脉冲冷却是一种充分利用二代堆核电厂二回路现有设备系统以延缓事故进程的新思路。为分析非能动脉冲冷却系统对SBO/TLFW事故的缓解作用,基于最佳估算系统程序RELAP5建立了中国改进型三环路压水堆(CPR1000)机组主系统、二回路和非能动脉冲冷却系统模型,在此基础上开展了SBO/TLFW事故工况分析,对比了有、无非能动脉冲冷却系统情况下的事故进程。计算结果表明,在停堆后8 min内开始启动且仅依靠除氧器存水,非能动脉冲冷却系统能够将堆芯开始裸露的时间推迟约12 h,可以显著延缓压水堆的SBO/TLFW事故进程。The current accident regulations of the second-generation reactor nuclear power plant are not enough to handle the superposition accident(SBO/TLFW)of the Station-Black-Out(SBO)and the Total Loss of Feed-Water(TLFW)accidents.Passive pulse cooling is a new approach to delay the accident process by fully utilizing the existing equipment and system in the secondary circuit of the second-generation reactor nuclear power plant.In order to analyze the mitigating effect of the passive pulse cooling system on SBO/TLFW,based on the best-estimate system code RELAP5,models of the primary system,the secondary circuit and the passive pulse cooling system of the CPR1000 unit were established,and accident scenarios were analyzed for the SBO/TLFW accident.The accident processes with and without the passive pulse cooling system were compared.The calculation results show that if the passive pulse cooling system is started within eight minutes following reactor scram,the core uncovering can be delayed by 12 hours,merely relying on the water stored in the deaerator,which can significantly delay the SBO/TLFW accident process in PWR.

关 键 词：非能动脉冲冷却 全厂失电(SBO) 完全丧失给水(TLFW) 

分 类 号：TL69[核科学技术—核技术及应用]