面向强放热室退役的高效复合去污技术研究  

Research on Efficient Compound Decontamination Technology for Decommissioning of Highly Radioactive Hot Cell

作　　者：贾昊鹏 滕磊 王帅[1,2] 王小兵 Jia Haopeng;Teng Lei;Wang Shuai;Wang Xiaobing(Nuclear Power Institute of China,Chengdu,610213,China;Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院,成都610213 [2]四川省核设施退役及放射性废物治理工程实验室,成都610213

出　　处：《核动力工程》2021年第3期193-196,共4页Nuclear Power Engineering

摘　　要：强放热室作为反应堆材料辐照检验的配套设施,其辐射水平高、结构复杂、去污难度较大。针对强放热室退役不锈钢壳体去污的特殊性和复杂性,开展了高压水射流去污、可剥离膜去污和机械打磨去污3个单项去污试验和去污工艺试验研究,并创新性的提出了一种强放热室不锈钢壳体高效复合去污工艺。经工程去污实践验证,去污后热室不锈钢覆面表面污染水平均低于40 Bq/cm^(2),去污因子最高达110以上,达到了国内先进水平。热室高效复合去污技术的研发解决了强放热室不锈钢壳体表面去污的技术难题,降低了退役阶段工作人员的受照剂量,保护了工作人员和环境的安全,具有显著的经济、社会效益。The highly radioactive hot cell is used as an auxiliary facility for the irradiation inspection of reactor materials,and the hot cells are with high radiation level,complicated structure and great difficulty in decontamination.In view of the particularity and complexity of the decontamination of the decommissioned stainless steel shell in the strong heat release chamber,this paper is carrying out three single-item decontamination tests and decontamination process test studies on the high-pressure water jet decontamination,the strippable film decontamination and the mechanical polishing decontamination.On the basis of this,an innovative composite decontamination process for stainless steel shells in a strong heat release chamber was innovatively proposed.The engineering decontamination practice verified that,the average level of contamination on the surface of the stainless steel cladding after the decontamination is below 40 Bq/cm2.The factor is as high as 110 or more,reaching the domestic advanced level.The research and development of the high-efficiency compound decontamination technology in the hot cell solves the technical problem of the decontamination of the stainless steel shell surface in the highly radioactive hot cell,reduces the exposure dose of workers in the decommissioning stage,protects the safety of workers and the environment,and has significant economic and social benefit.

关 键 词：热室 不锈钢覆面 复合去污 

分 类 号：TL944[核科学技术—辐射防护及环境保护]