某地铁X射线行李包检查系统的放射防护状况

目的了解某地铁X射线行李包检查系统放射防护状况,评估其在运行过程中对安检人员和公众健康的影响。方法按照《X射线行李包检查系统卫生防护标准》(CBZ 127-2002)的要求进行检测。结果 2种型号的X射线行李包检查系统泄漏辐射水平均以行李包入口侧为最高,最高值为1.36μGy/h;其次为行李包出口侧(最高值为0.45μGy/h),再其次为柜体顶部(最高值为0.22μGy/h),左侧壁和右侧壁基本接近本底辐射水平;安检人员操作位和旅客通道的辐射水平基本接近本底辐射水平,旅客送包处的辐射水平最高值为0.83μGy/h,旅客拎取包处的辐射水平最高值为0.29μGy/h。结论该地铁34台X射线行李包检查系统防护情况均良好,其泄漏辐射水平符合国家标准的要求,该系统在正常运行的状态下,不致于对放射工作人员和公众的健康与安全造成影响。

Radiological protection of a subway X-ray luggage inspection system

[Objective]To know the status of radiological protection of a subway X-ray luggage inspection system,assess the effect on health of inspectors and public during operation.[Methods]The detection was carried out according to the Radiological protection standards for X-ray luggage inspection system(CBZ 127-2002).[Results]In two types of X-ray luggage inspection system,the leakage radiation levels of inlet side of the luggage were the highest(the maximum value was 1.36 μGy/h),followed by the export side(the maximum value was 0.45 μGy/h) and the cabinet roof(the maximum value was 0.22 μGy/h),and those of left and right side plate were close to the level of background radiation.The radiation levels of operation seat and passenger channel were close to the level of background radiation.The radiation maximum value of passenger sending inlet side and passenger taking side was 0.83 μGy/h and 0.29 μGy/h respectively.[Conclusion]The status of radiological protection of 34 subway X-ray luggage inspection systems are good,and the leakage radiation levels meet the national standards.Under normal operating conditions,this system cannot damage the health and safety of inspectors and public.