氢气复合器与点火器消氢效率与安全性

氢气点火器与氢气复合器是两种消除严重事故安全壳内氢气的设备。以火焰加速准则和燃爆转变准则为基础,利用GA SFLOW程序对影响氢气点火器与复合器的消氢效率和使用安全性的因素:水蒸气浓度和氢气释放速率,进行了研究。结果表明,水蒸气能够有效抑制氢气火焰加速和氢气从燃烧向爆炸的转变;在氢气释放速率较高的情况下,氢气复合器不能够快速有效地消除氢气;采取氢气复合器结合点火器的方式可以安全、有效地降低氢气燃烧带来的风险。

Efficiency and safety of hydrogen recombiners and igniters

Hydrogen recombiners and igniters are two promising hydrogen mitigation systems for use during severe accidents in nuclear power plants.The efficiency and safety of hydrogen recombiners and igniters were investigated based on flame acceleration criterion and the criterion for the deflagration to detonation transition(DDT).Two factors investigated were the steam concentration and the hydrogen release rate.The results indicate that steam can efficiently control hydrogen flame acceleration and DDT,and that the recombination of hydrogen in recombiners and igniters is a safe way to reduce the hydrogen combustion risk but recombiners alone can not deal with high hydrogen release rates.