严重事故氢气燃爆缓解措施的初步研究

Preliminary Studies on Hydrogen Deflagration Mitigation Measures during Severe Accident

轻水堆核电站发生严重事故时,氢气的大体积氢燃爆可能会严重威胁安全壳的完整性。氢气点火器与氢气复合器是2种严重事故下的氢气燃爆缓解设备。本文分别研究了3种氢气燃爆缓解措施,包括仅采用氢气点火器、仅采用氢气复合器和采用氢气复合器结合点火器。结果表明,采用氢气复合器结合点火器的方式可以安全、持续、有效地降低大体积氢燃爆带来的风险。

Largescale hydrogen combustion and detonation in the containment building may threaten the integrity of the containment when a postulated severe accident takes place in a light water reactor nuclear power plant. Hydrogen recombiners and igniters are two promising hydrogen mitigation equipments under severe accident. Three mitigation measures, including using igniters only, employing hydrogen recombiners only and adopting the combination of recombiners and igniters, were investigated in this paper. The analysis results indicate that combination of hydrogen recombiners and igniters can mitigate the risk of hydrogen combustion in a safe, continuous, and effective way.