安全壳超压排放工况下乏池水洗效果增强措施研究  

Study on the Measures to Enhance Spent Fuel Pool Scrubbing Effect under Containment Overpressure Release Condition

作　　者：高圣钦 付亚茹 梅其良 孙大威 GAO Shengqin;FU Yaru;MEI Qiliang;SUN Dawei(Shanghai Nuclear Engineering Research and Design Institute,Shanghai 200233,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233

出　　处：《核科学与工程》2021年第6期1275-1280,共6页Nuclear Science and Engineering

基　　金：国家科技重大专项课题“CAP1400核电厂安全增强措施研究”(2017ZX06002003)。

摘　　要：在CAP1400核电厂安全壳超压排放工况下,安全壳内的水蒸气和不凝性气体的混合气体将被排往乏燃料池,为安全壳卸压,同时乏燃料水池可对其中的放射性物质起到水洗去除的作用。为了增强该工况下乏池对放射性物质的水洗去除效果,减少安全壳超压排放造成的厂外剂量后果,本文针对CAP1400核电厂安全壳超压排放工况下的水洗过程,选取多个水洗关键参数进行敏感性分析,以研究其对乏池水洗气溶胶的总去污因子(DF)的影响,根据分析结果和工程实际,提出了增强乏池放射性水洗效果的措施和建议,可为超压排放装置的优化设计等提供参考。Under the CAP1400 containment overpressure release condition, the mixture of steam, non-condensable gas and radioactive materials in the containment will be discharged into the spent fuel pool so that the containment pressure could be reduced, and the radioactive materials could be removed by the spent fuel pool at the same time. In order to enhance the pool scrubbing effect of the spent fuel pool under such condition and to reduce the offsite dose consequence caused by the containment overpressure release, in this paper, several essential parameters specific to this pool scrubbing process are selected to conduct the sensitivity study to investigate their effect on the overall aerosol decontamination factor(DF). Combing the sensitivity study results and engineering practice, several measures and suggestions used to enhance the spent fuel pool scrubbing effect are proposed, which could provide reference for the optimization design of the overpressure release device.

关 键 词：水洗 核电厂 严重事故 安全壳超压排放 敏感性分析 气溶胶 

分 类 号：TL329.3[核科学技术—核技术及应用]