X射线行李包安检设备辐射泄漏量的MCNP模拟

目的 模拟计算地铁站所使用的X射线行李包安检设备辐射泄漏量的大小。方法 采用MCNP4C程序来模拟X射线安检设备在使用过程中X射线的泄漏量。结果 人体接受到的最大辐射剂量为8.26μSv/a,但如果能保持安检设备铅帘的完整性人体受到的辐射剂量仅为0.0727μSv/a。结论 当行李进出安检机并导致铅帘产生缝隙时,辐射泄漏量会显著增大;人体所受到的最大辐射量仍低于《电离辐射防护与辐射源安全基本标准》(GB18871-2002)中规定的10μSv/a的豁免标准。

The MCNP simulation of the X-ray leakage of X-ray security inspection Equipment

Objective To simulate the radiation leakage of the X-ray security inspection equipment used in the subways stations.Methods We use the MCNP4C code to simulate the X-ray leakage of the equipment during the working process.Result the biggest amount of radiation received by the body is 8.26μSv/a,however,if the Lead screens of the X-ray security equipment is intact,the amount of radiation received by the body is only 0.0727μSv/a.The final.Conclusions When the baggage get in /out the X-ray security inspection equipment,the gas in Lead screens was made,and then the amount of radiation received by human body increased;The amount of radiation received by the body is close to but still below 10μSv/a which is the exemption criteria set by the ＂safety of radiation sources of ionizing radiation protection and basic standards＂（GB18871-2002）.