成都市地铁X射线行李包检查系统放射防护水平调查研究

目的 了解成都市地铁X射线行李包检查系统放射防护状况,为保障安检工作人员和公众的健康与安全提出对策依据。方法 使用451P X-γ巡测仪,在成都市各地铁入口按照《X射线行李包检查系统卫生防护标准》(GBZ127-2002)的要求进行辐射剂量检测。结果 目前成都市地铁使用的X射线行李包检查系统为同一个厂家的2种型号,检测结果显示,行李包入口侧的空气比释动能率水平最高(均值为0.48 μGy/h),最高值为1.36 μGy/h;其次为行李包出口侧(均值为0.27 μGy/h),最高值为0.45 μGy/h,系统其他外表面以及安检人员操作位和旅客通道区域基本接近本底辐射水平。结论 目前成都市地铁一、二号线X射线行李包检查系统放射防护情况良好,其空气比释动能率符合国家标准的要求,在正常运行状态下,不会对公众、安检工作人员的健康与安全造成影响。

Radiation dose Analysis of X-ray Luggage Inspection System in Chengdu Subway Stations

Objective To evaluate the status of radiological protection of X-ray luggage inspection system in subway stations,in order to provide basic data for radiological health protection and management and provide basic countermeasure of protecting the effecton health of inspectors and the public during operation.Methods The detection was carried out according to the Radiological protectionstandards for X-ray luggage inspection system (CBZ 127-2002).Results Chengdu subway stations currently include the use of two kinds of models of the X-ray luggage inspection system air kerma rate levels in luggage entry side as the highest (average 0.48 μGy/h), the highest for 1.36 μGy/h; Second for luggage export side (average 0.27 μGy/h) peaks at 0.45 mu Gy/h, system outside surface, and other basic channels and passenger security personnel operation area close to the background radiation level.Conclusion The status of radiological protection of subway Stations X-ray luggage inspection systems are good in Chengdu,and the leakage radiation levels meet the national standards. Under normal operating conditions,this system can not damage the health and safety of inspectors and the public.