乏燃料水池氢气风险分析和对策研究

发布时间：2018-03-06 21:12

本文选题：乏燃料水池　切入点：氢气风险　出处：《原子能科学技术》2016年12期 　论文类型：期刊论文

【摘要】：福岛核事故暴露了乏燃料水池安全研究的不足,尤其是氢气风险评价方面的不足。根据IAEA及我国相关法规要求,应对核电厂乏燃料水池发生严重事故后的氢气风险进行评估,并对氢气风险的消除进行对策研究。本文采用MELCOR程序建立分析模型,计算研究了乏燃料水池严重事故下的事故进程和氢气产生与浓度分布,评价了厂内氢气风险并定量研究了氢气风险缓解措施。分析结果表明,氢气风险是存在的。对补水、喷淋、通风和氢气复合器等缓解氢气风险措施的研究表明,注水和喷淋是可完全消除氢气风险的,但通风和氢气复合器并不能完全消除氢气风险。消除乏燃料水池严重事故下氢气风险的重点应为保证补水措施有效,对此可提高补水措施的可靠性和阻止乏燃料水池的泄漏。
[Abstract]:The Fukushima nuclear accident exposed the shortage of safety research in the spent fuel pool, especially in the risk assessment of hydrogen. According to the requirements of IAEA and relevant regulations of our country, hydrogen risk should be assessed after serious accident in the spent fuel pool of nuclear power plant. In this paper, MELCOR program is used to establish an analytical model to calculate and study the accident process and hydrogen generation and concentration distribution in a spent fuel tank under serious accidents. The hydrogen risk mitigation measures are evaluated and quantitatively studied. The results show that the hydrogen risk exists. The research on the hydrogen risk mitigation measures, such as rehydration, spray, ventilation and hydrogen compactor, shows that, Water injection and spray can completely eliminate the risk of hydrogen, but ventilation and hydrogen compounding can not completely eliminate the risk of hydrogen. The emphasis of eliminating hydrogen risk in the serious accident of spent fuel pool should be to ensure the effective measures of rehydration. This can improve the reliability of water supply measures and prevent the leakage of spent fuel pool.
【作者单位】：中国核电工程有限公司;环境保护部核与辐射安全中心;
【分类号】：TM623.8

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