先进压水堆大破口始发严重事故下安全壳内氢气风险分析

发布时间：2018-04-11 17:24

  本文选题：大破口失水事故 + 先进压水堆　； 参考：《核科学与工程》2017年04期

【摘要】：本文采用集总参数法,在先进非能动压水堆核电厂严重事故一体化分析模型基础上,考虑先进压水堆非能动安全特性以及严重事故下采取熔融物堆内滞留(IVR)措施等特性对氢气风险的影响,开展了典型严重事故下安全壳内氢气风险分析。分别选取了冷段双端剪切断裂大破口、冷段大破口叠加IRWST重力注水有效以及ADS-4误启动三个典型大破口失水事故序列,对事故进程中的氧化温度、产氢速率以及产氢质量等特性进行了研究。选取产氢量最大的冷段大破口叠加IRWST重力注水有效事故序列,分析了氢气点火器系统的消氢效果。结果表明,堆芯再淹没过程产生大量氢气,采用点火器可有效去除安全壳内的氢气,从而降低氢气燃爆风险。
[Abstract]:In this paper, the lumped parameter method is used on the basis of the integrated analysis model for the serious accidents of advanced non-active pressurized water reactor nuclear power plants.Considering the influence of the non-active safety characteristics of advanced pressurized water reactor (PWR) and the measures such as IVR (molten matter retention) in serious accidents on the hydrogen risk, the risk analysis of hydrogen in containment under typical serious accidents was carried out.In this paper, three typical water loss accident sequences of cold section double end shear fracture, IRWST gravity injection superimposed by cold section and ADS-4 misstarting are selected, and the oxidation temperature in the process of the accident is analyzed.The characteristics of hydrogen production rate and hydrogen production mass were studied.The hydrogen suppression effect of hydrogen igniter system is analyzed by selecting the sequence of IRWST gravity injection effective accident sequence with the largest hydrogen production in the cold section.The results show that a large amount of hydrogen is produced during the reflooding of the reactor core, and the ignition device can effectively remove the hydrogen in the containment, thus reducing the risk of hydrogen explosion.
【作者单位】： 上海交通大学机械与动力工程学院;
【基金】：国家科技重大专项资助项目(2015ZX06004003-002)
【分类号】：TL364.4
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本文编号：1736948