CPR1000核电厂全厂断电事故缓解措施有效性分析  

Analysis on effectiveness of mitigation measures in SBO accident in CPR1000 NPP

作　　者：周克峰[1] 冯进军[1] 曹小平[1] 褚倩倩[1] 石俊英[1] ZHOU Ke-feng;FENG Jin-jun;CAO Xiao-ping;CHU Qian-qian;SHI Jun-ying(Nuclear and Radiation Safety Center,MEP,Beijing 100082, Chin)

机构地区：[1]环境保护部核与辐射安全中心,北京100084

出　　处：《核科学与工程》2018年第3期438-447,共10页Nuclear Science and Engineering

摘　　要：为防止发生高压熔堆,降低安全壳内氢气燃爆的风险,CPR1000型核电厂采取了一系列的严重事故缓解措施。应用新版的MELCOR 2.1程序,针对有无严重事故缓解措施条件下全厂断电(SBO)事故序列进行计算分析,模拟了事故进程中堆芯的状态,对事故过程中氢气的产生、分布及其行为进行了评估。分析结果表明,稳压器卸压功能延伸能够有效防止高压熔堆现象的发生,消氢系统通过在安全壳内的合理布置,可有效降低氢气爆炸的风险,防止了安全壳发生早期失效。To prevent high-pressure core melt accident and reduce the risk of hydrogen explosion in containment, a series of severe accident mitigation measures were adopted by CPR1000 type nuclear power plant. MELCOR code was used to analysis SBO accident Under the condition of with and without mitigation measures. The core status, hydrogen production, distribution and behavior in containment were evaluated. The result show that, pressurizer pressure relief function extension can prevent high-pressure core melt accident and the reasonable distribution of hydrogen recombiners can reduce the risk of hydrogen explosion. The mitigation measures can avoid the early failure of containment.

关 键 词：MELCOR2.1程序 CPR1000型核电厂 全厂断电事故 缓解措施 

分 类 号：TL48[核科学技术—核技术及应用]