严重事故管理导则中的氢气风险判断及事故模拟分析

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Hydrogen Risk Assessment in SAMG and Simulation

摘要: 建立严重事故管理导则中用于判断氢气燃烧、超压风险以及安全壳降压时氢气风险的判断工具。用一体化事故分析程序对全厂断电事故进行模拟计算,用该氢气风险判断工具对不同事故阶段的氢气风险进行分析。结果表明:在全厂断电始发的严重事故下,没有氢气复合器且没有安全壳喷淋时,安全壳大气在一段时间内会被水蒸气惰化,不会发生燃烧,但如果应急电源恢复,重新启动安全壳喷淋时,有可能引起氢气燃烧甚至造成安全壳超压;在增加氢气复合器后,没有造成安全壳超压的风险,并且判断结果是保守的。
- 核电厂 /
- 严重事故 /
- 氢气 /
- 全厂断电
Abstract: In this paper,a tool used in SAMG to assess the hydrogen flammability and hydrogen impact when depressurizing containment is built.The station black out scenario is simulated with code,and hydrogen risks at different phase of the accident are analyzed.The results show that in the SBO scenario without hydrogen recombiners,the atmosphere will be inerted by steam for a while.But if the power recovers,and the containment is depressurized by spray,there will be risk of hydrogen burn and overpressure.In the scenario with hydrogen recombiners,there is no risk of overpressure,and the result is conservative.
- Nuclear Power Plant /
- Severe accident /
- Hydrogen /
- SBO