摘要
为更好地对氢气燃烧风险进行分析,采用GASFLOW-MPI 1.0程序对大型压水堆核电站建立分析模型开展氢气分布和燃烧计算研究。在分析过程中考虑了氢气缓解措施和氢气分布情况对燃烧及爆炸的影响。氢气缓解措施有效时,同时由于局部隔间受到水蒸气惰化作用影响,局部隔间点火后并未造成火焰向其他隔间和安全壳大空间范围内发生传播现象;当氢气缓解措施失效时,较高的氢气浓度使安全壳内火焰得以传播,燃烧的最大温度约2000 K,最大压力约1 MPa;氢气浓度分布形式会对火焰传播和燃烧后果产生较大影响,氢气总量一定时,考虑氢气梯度分布会造成安全壳穹顶位置具有较高的氢气浓度,在点火初期极大地加速了火焰燃烧产生的能量和火焰传播速度,因此会造成更为严重的氢气风险。
In order to better analyze the risk of hydrogen combustion,GASFLOW-MPI 1.0 is used to establish an analysis model for large PWR to study the hydrogen distribution and combustion.The effect of hydrogen mitigation measures and hydrogen distribution on combustion and explosion are considered in the analysis.The results show that,when the hydrogen mitigation measures are effective,and under the inertness of steam after fire in local compartment,the flame does not spread to other compartments and the large space of the containment.When the hydrogen mitigation measures fail,the higher hydrogen concentration makes the flame in the containment propagate.The maximum combustion temperature is about 2000 K and the maximum pressure is about 1 MPa.The hydrogen distribution will have a great impact on flame propagation and combustion consequence.When the total amount of hydrogen is certain,considering the gradient distribution will cause a higher hydrogen concentration at the dome of the containment,which greatly accelerates the energy generated by combustion and flame speed at the initial stage of the ignition,so it will cause more serious hydrogen risk.
作者
李精精
孙晓晖
蔡盟利
林盛盛
王辉
LI Jingjing;SUN Xiaohui;CAI Mengli;LIN Shengsheng;WANG Hui(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2023年第2期421-427,共7页
Nuclear Science and Engineering
