大功率压水堆严重事故下IVR-ERVC对裂变产物释放的影响

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英文篇名：The Effect of IVR-ERVC on the Release of Fission Products Under Severe Accident for Large Power PWR 作者：陈海英 ; 孙洪平 ; 兰兵 ; 史强 ; 刘福东 英文作者：CHEN Haiying;SUN Hongping;LAN Bing;SHI Qiang;LIU Fudong;Nuclear and Radiation Safety Center,MEP; 关键词：严重事故 ; MAAP ; IVR-ERVC ; 大功率压水堆 ; 裂变产物 英文关键词：severe accident;;MAAP;;IVR-ERVC;;large power PWR;;fission product 中文刊名：GYAF 英文刊名：Industrial Safety and Environmental Protection 机构：环境保护部核与辐射安全中心;西安交通大学; 出版日期：2019-01-10 出版单位：工业安全与环保 年：2019 期：v.45 基金：科技部重大专项CAP1400安全审评关键技术研究(2013ZX06002001) 语种：中文; 页：GYAF201901013 页数：4 CN：01 ISSN：42-1640/X 分类号：55-58

摘要

以大功率非能动压水堆为研究对象,采用MAAP程序研究RCS热管段5 cm小破口始发严重事故下IVR-ERVC对裂变产物释放的影响。结果表明,启动ERVC时安全壳内的Cs I质量份额约0. 29,释放到环境中的惰性气体和Cs I质量份额分别为0. 001 3,1. 95×10~(-5),不启动ERVC时安全壳内的Cs I质量份额约为0. 38,释放到环境中的惰性气体和Cs I质量份额分别为0. 94,2. 95×10~(-2)。大功率非能动压水堆严重事故后启动ERVC,能有效地将熔融物滞留在压力容器内,保持压力容器的完整,降低事故后惰性气体和Cs I向环境的释放量。
        The effect of IVR-ERVC on the release of fission products was studied by MAAP code for the large power passive PWR under severe accident induced by 5 cm small break of the RCS heat pipe. The results indicated that when starting ERVC,29% of Cs I released into the containment,and the fraction of inert gas and Cs I released into the environment were 0. 001 3 and 1. 95 × 10~(-5)respectively. About 38% of Cs I released into the containment without ERVC,and the fraction of inert gas and Cs I released into the environment were 0. 94 and 2. 95 × 10~(-2)respectively.The ERVC can effectively retain the melt in the reactor pressure vessel,maintain the integrity of the reactor vessel and reduce the release of inert gas and Cs I to the environment after the severe accident for large power passive PWR.

引文

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