大亚湾和岭澳核电站安全壳氢气风险及消氢措施有效性分析

Analysis of hydrogen risk in containment and efficiency of elimination measures for Daya Bay and Ling Ao NPP

使用MAAP程序计算大亚湾和岭澳核电站严重事故条件下安全壳内的相关质能释放和氢气源项;利用TONUS程序建立安全壳集总参数模型,计算分析氢气在安全壳内的分布情况;结合非能动氢复合器消氢性能、现场条件和氢气分布情况,提出氢复合器布置方案;借助TONUS和GASFLOW程序,分别使用集总参数法和CFD法,验证消氢方案的有效性。验证结果表明,安全壳内氢气浓度满足相关法规要求。

This paper calculates the mass-energy release and hydrogen source term inside the containments of Daya Bay and Ling Ao Phase I nuclear power plants under severe accidents with MAAP program,and builds a model of the containment to analyse hydrogen distribution using TONUS program.An arrangement scheme of the passive hydrogen recombiners（PAR） is put forward taking account of the performance of the PARs,site conditions and hydrogen distribution.The efficiency is validated by lumped parameter method and CFD method with TONUS and GASFLOW program respectively.The validation result shows that the hydrogen concentration in the containment meets the requirements of relative regulations.