钴-60放射源货包运输跌落事故的辐射影响分析  

Analysis of the radiation effect of Cobalt-60 radioactive source package dropping accident during transportation

作　　者：陈亮平[1] 韩春彩[1] 许慧萍[1] 许忠扬 CHEN Liangping;HAN Chuncai;XU Huiping;XU Zhongyang(China Institute of Atomic Energy,Beijing 102413 China;Nuclear and Radiation Safety Center,Ministry of Ecology and Environment)

机构地区：[1]中国原子能科学研究院,北京102413 [2]生态环境部核与辐射安全中心

出　　处：《中国辐射卫生》2020年第6期649-652,共4页Chinese Journal of Radiological Health

摘　　要：目的探讨B(U)型钴-60运输货包发生严重跌落事故后,对事故处理人员、公众,以及事故处理后重新启动运输的相关工作人员及公众的辐射影响。方法选取国内一条贯穿南北的典型运输路线,对B(U)型钴-60运输货包发生严重跌落事故的辐射影响进行分析。结果 B(U)型钴-60运输货包发生跌落事故后,事故处理人员所致最大剂量为3.2 mSv;距离事故10m处的公众所致最大剂量为5.6×10-2 mSv;事故货包重新启运后对运输工作人员所致最大剂量为9.6 mSv,对运输沿线公众所致最大剂量为5.2×10-2 mSv。结论 B(U)型钴-60运输货包发生严重跌落事故后,对事故处理人员以及事故处理后重新启动运输的相关工作人员所致剂量最大为载货司机,低于事故处理人员剂量控制值10 mSv;对事故点公众及事故处理后重新启动运输后运输沿线公众所致剂量低于事故公众剂量控制值1 mSv。Objective This paper discussed the radiation effects on the staff and the public from the serious falling accident of type B(U) Cobalt-60 transport package, as well as from the restarted transport after the accident treatment. Methods A typical transportation route running through the north and south of China was selected, which was used in the serious dropping accident analysis of the radiation effect of type B(U) Cobalt-60 transport package. Result Due to the falling accident of type B(U) Cobalt-60 transport package, the maximum dose to the accident handling personnel was 3.2 mSv, and the maximum dose to the public at 10 m away from the accident point was 5.6×10-2 mSv;the maximum dose to the driver during the re-shipment from the damaged package was 9.6 mSv, and the maximum dose to the public along the transportation line was 5.2×10-2 mSv. Conclusion After the falling accident of type B(U) Cobalt-60 transport package, the dose to the accident handling personnel and the relevant staff who restarted the transport after the accident handling was lower than the dose control value of the accident handling personnel by 10 mSv;the dose to the public near the accident point and the public along the transport line after the restart of the transport was lower than the dose control value of the accident public by 1 mSv.

关 键 词：钴-60放射源 运输 跌落事故 辐射影响 

分 类 号：X591[环境科学与工程—环境工程]