某核电厂乏燃料棒公路运输过程中的辐射风险分析

目的 本文通过对某核电厂乏燃料运输过程的辐射影响后果分析，给出了运输过程的辐射风险值，提出了乏燃料运输过程中辐射应急建议。方法 采用RG1.145提供的大气扩散模型估算潜在运输事故后果，事故期间放射性物质的释放考虑为地面释放，照射途径考虑烟云浸没外照射、吸入内照射和地面沉积外照射。结果 经分析估算，乏燃料棒公路运输发生跌落事故时，其辐射风险值最大为2.4×10^-5。结论 根据事故情景和估算结果，本文提出了相关的应急措施，为乏燃料棒运输的托运人和承运人制定运输应急预案给予指导，提高乏燃料运输的安全性。

Radiation risk analysis of spent fuel rod road transportation from a nuclear power plant

Objective In this paper, through the analysis of the radiation effect on the transport process of the spent fuel from a nuclear power plant,the radiation risk value of the transportation is given,and the suggestion for radiation emergency in spent fuel transportation is proposed.Methods The atmospheric diffusion model provided by RG1.145 is used to estimate the consequences of the potential accident. The release of radioactive materials during the accident is considered as ground release. Exposure pathways are considered including external exposure from plume immersion, inhalation of irradiation and external irradiation surface.Results It is estimated that the maximum radiation risk value from accidents of the spent fuel rod transportation is 2.4×10^-5.Conclusion According to the accident situation and the estimated results, the relevant emergency measures are put forward to guide the shipper and carrier for the transportation of spent fuel rods. Meanwhile, the shipper and the carrier are suggested to strengthen the emergency rehearsal of the spent fuel transportation and improve the safety of the spent fuel transportation.