某车站X射线行李包检查系统辐射水平分析

Radiation Level of X-Ray Luggage Inspection System in a Train Station

[目的]检测某车站X射线行李包检查系统外表面辐射水平，进行安全评价和放射性豁免分析。[方法]使用便携式电离室射线巡测仪，按国家标准规范要求进行布点检测。[结果]该车站工作人员因X射线行李包检查工作而增加的辐射剂量为76-91μSv／a，远低于放射职业人员连续5年的年平均有效剂量限值20mSv／a，但高于公众个体受照剂量10μSv／a。[结论]正常使用x射线行李包检查系统不会对工作人员和旅客造成辐射损害，但不能予以放射性豁免。

[ Objective ] To determine the radiation level of an X-ray luggage inspection system in a train station for safety evaluation and radioactivity exemption analysis. [ Methods ] A pressurized microR ion chamber survey meter was used to quantify radiation level of a selected luggage inspection system according to relevant national standards. [ Results ] The increased radiation level caused by the X-ray luggage inspection system to the station staff was around 76-91 μSv/a, far less than the national exposure standard that allows an average exposure dose over 5 years to radiation professionals of 20mSv/a. However, this increased dose was higher than the standard for public individuals （10 μSv/a）. [ Conclusion ] The routine usage of the X-ray luggage inspection system does not cause radiation harm to inspection staff and travelers. Nevertheless, the system does not meet the national radioactivity exemption regulation.