CPR1000二次侧非能动应急热阱设计与事故缓解能力分析

Analysis of Secondary Emergency Passive Heat Sink’s Ability to Relieve Accident of CPR1000

摘要: 在主给水管道破裂事故下，利用RELAP5/MOD3.4程序对CPR1000压水堆一回路热工水力参数瞬态特性进行分析计算，验证采用空冷换热器的CPR1000二次侧非能动应急热阱对事故的缓解能力。计算结果表明：CPR1000在发生主给水管道破裂事故后，二次侧非能动应急热阱完全可及时向蒸汽发生器补水，同时导出堆芯余热，保证反应堆处于安全状态，从而验证了CPR1000二次侧非能动应急热阱的设计是成功的。

Abstract: The transient thermal hydraulic characteristics of CPR1000 were analyzed using RELAP5/MOD3.4 to verify the capability of the adopting aircooled heat exchanger’s emergency passive heat sink (EPHS) for accident mitigation under the condition of feedwater line break (FLB). The calculation results show that the EPHS of CPR1000 can supply the water to steam generator immediately and remove the core residual heat after the FLB successfully. Therefore, it demonstrates that the design of the EPHS of CPR1000 is successful.