UO_(2)芯块研制实验室初步源项调查  

Preliminary Source Terms Survey for a UO_(2) Pellet Development Laboratory

作　　者：杨海涛 刘小龙[1] 潘学荣 任萌[1] 周显明 徐凯迪 王特 YANG Haitao;LIU Xiaolong;PAN Xuerong;REN Meng;ZHOU Xianming;XU Kaidi;WANG Te(Nuclear Power Institute of China,CNNC,Chengdu 610041,China)

机构地区：[1]中国核动力研究设计院,四川成都610041

出　　处：《铀矿冶》2023年第4期64-70,共7页Uranium Mining and Metallurgy

摘　　要：某UO_(2)芯块研制实验室计划退役,为初步掌握该实验室内放射性污染情况,对其进行了初步源项调查,调查内容包括实验室运行历史、表面污染水平、γ辐射剂量水平、气溶胶浓度水平,以及污染面积和污染物项估算等。调查结果显示:该实验室主要污染核素为^(234)U、^(235)U和^(238)U,放射性污染核素单一;实验室内的表面污染水平、γ辐射剂量水平、气溶胶浓度水平较低;地面及墙面污染面积总计约1000 m^(2);退役时需进行去污操作的设备约300台;内部积存各类放射性固体废物约80 m^(3)。因实验室内污染物项种类繁多,各类污染物污染程度差异较大,在进行退役治理时,应将废物做好分类处理,防止交叉污染。A UO_(2) pellet development laboratory is planning to be decommissioned,in order to know the radioactive contamination inside the laboratory,a preliminary source terms survey was carried out,including the operation history,surface pollution level,γradiation dose level,aerosol concentration level investigation,as well as the contaminated area and pollutant items estimation.The results show that the main contamination nuclides are ^(234)U,^(235)U and ^(238)U,the radioactive contamination nuclides are single.The surface contamination level and theγradiation dose and the aerosol concentration in the radioactivity laboratory is low.The contaminated area of the ground and wall of the experimental building is about 1000 m^(2),about 300 units of equipment need to be decontaminated,and the temporary storage of radioactive solid waste is about 80 m^(3).Due to a wide variety of pollutants,and the pollution degree of various pollutants varies greatly,the solid waste should be classified during decommissioning treatment to prevent cross-contamination of various pollutants.

关 键 词：退役 源项调查 放射性污染 UO_(2)芯块 

分 类 号：TL943[核科学技术—辐射防护及环境保护]