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
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摘要:
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20 mSv/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。 Abstract: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 20 mSv/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.
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