基于Gasflow程序的非能动安全压水堆氢气行为计算和分析  

Calculation and Analysis of Hydrogen Behavior for Passive Safety PWR based Gasflow Code

作　　者：乔雪冬[1] 毕金生[1] 胡健[1] 王桂敏[1] Qiao Xuedong;Bi Jinsheng;Hu Jian;Wang Guimin(Nuclear and Radiation Safety Center,MEP,Beijing 100082,China)

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《核安全》2018年第4期64-69,共6页Nuclear Safety

基　　金：大型先进压水堆及高温气冷堆电站国家科技重大专项:CAP1400安全审评关键技术研究;项目编号:2013ZX06002001;大型先进压水堆及高温气冷堆电站国家科技重大专项:CAP1400核安全监管重要试验验证;项目编号:2015ZX06002007

摘　　要：本文利用Gasflow程序对非能动压水堆发生假想的严重事故后,安全壳内的氢气流动、分布和积聚行为进行了计算和分析,对安全壳内各房间的氢气风险进行了评价并给出了降低氢气燃烧风险的建议。计算结果表明,在发生大破口事故中,安全壳内氢气浓度较高的区域为破损蒸汽发生器隔间,内置换料水箱隔间和上部隔间,需要设置消氢系统来降低隔间内的氢气浓度。By using the code of Gasflow, hydrogen flow distribution and accumulation in containment during the severe accident in passive safety PWR are calculated and analyzed. The hydrogen risk is as- sessed for every chamber in the containment. Based on the calculation results of hydrogen distribution, suggestions for reducing the risk of hydrogen combustion are given in this paper. The simulation results indicate that during the LBLOCA accident, The damaged SG chamber, IRWST chamber and Upper chamber would be the higher hydrogen concentration area, where hydrogen eliminating system is necessary to set up for reduction of hydrogen concentration.

关 键 词：氢气行为 安全壳 Gasflow程序 

分 类 号：TL339[核科学技术—核技术及应用]