After Fukushima-Tragedy in Japan,due to severeconsequencessuch as containment losing effectiveness and radioactivity breaking out which caused by hydrogen explosion,havemaked analysis of hydrogenflammabilitycontrol methods in FQNPC during severe accidents,and provided introductions,usages,superiorities and side effectes of eachmethods,topreliminarydefinite the risk of hydrogen explosion.To help reactor operators to recognize hydrogenflammabilitycontrol methods. and then they can choose correctmedthods to deal Severe Accidents,gived correct advices.%日本福岛核事故后，针对其氢气爆炸会带来安全壳失效和放射性物质外泄的严重后果，给出了福清核电厂严重事故下氢气可燃性控制方案的分析，提供了各个方案的介绍，使用方法，由此带来的优点和副作用，以初步确定根据氢气爆炸的风险大小。帮助操纵员认识氢气可燃控制方案，并可恰当地选择方案中最合适的缓解事故后果的措施，给出了相应建议和意见。
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