氢气催化复合器对核电厂严重事故的缓解效果

Hydrogen Removal Effects of Passive Catalytic Recombiners to Mitigate Severe Accident in Nuclear Power Plant

在严重事故条件下,安全壳内的氢气燃烧或爆炸威胁安全壳完整性,必须采取措施减小或消除安全壳的氢气风险。针对600MWe级核电厂的大型干式安全壳,以小破口失水诱发的严重事故序列为基准事故,计算分析了氢气催化复合器(PAR)消除安全壳内氢气的效果,及复合效应对安全壳压力温度的影响。研究表明:氢气催化复合器能够持续稳定地消除安全壳内氢气.但对于极其快速的氢气释放,它的消氢能力受到一定限制。

Under severe accident conditions, the integrity of containment is threaten by hydrogen deflagration or detonation, and measures must be implemented to mitigate or eliminate the hydrogen risk. For the specific 600 MWe nuclear power plant with largedry containment, the small-break loss-of-coolant-accident （SB-LOCA） was calculated, and the removal effects of passive autocatalytic recombiners and their impacts on the containment pressure and temperature were analyzed. The results show that catalytic recombination can remove hydrogen in containment continually and steadily, however, its capability is somewhat limited for large quick hydrogen release.