工业X射线探伤室的辐射屏蔽

Radiation shielding of industrial X-ray radiography room

目的分析X射线对防护门屏蔽影响。方法依据GBZ/T 250-2014中推荐公式,计算得到一次散射和二次散射对门缝外的剂量贡献值。结果一次散射线对防护门门缝外剂量影响较大,二次散射线对门缝外的剂量存在一定影响,但在限值范围内。结论到达门缝外的散射线经过散射的次数越多,影响越小。一定条件下,主射线经过二次散射后到达防护门门缝外的剂量即能满足标准限值的要求。

Objective To analyzed the shielding effect of X - ray on protective door. Methods We calculated the dose con- tribution of primary and secondary scattering to the outside of the door by using the recommended formula in （ GBZ/T 250 - 2014）. Results The influence of primary scattering on the external radiation dose of the door is great, the secondary scatter- ing has certain influence on the dose outside the door, but within the limit. Conclusion The more scattering the scattering line, the smaller the effect on the external radiation dose. Under certain conditions, the main radiation ray by the second scat- tering, the dose outside the door meets the standard limit of requirements.