加速器机房周围剂量当量率理论计算和实际测量结果的对比研究

目的 通过对加速器机房周围剂量当量率理论计算结果与实际测量结果的比较,探讨两者之间的关系及成因。方法 采用十分之一层法估算加速器机房主、次屏蔽墙外的周围剂量当量率,根据国家相关标准推荐的检测方法对加速器机房主、次屏蔽墙外的周围剂量当量率进行检测。结果 各加速器机房周围剂量当量率的实际测量结果均小于理论计算结果,主屏蔽墙周围剂量当量率的测量结果较之理论计算结果偏小30.0%~56.0%。结论 应用十分之一层法来估算加速器机房周围剂量当量率是可行的,偏安全的。

A Comparative Study on Theoretical Results and Measurement Results of the Accelerator Room Ambient Dose Equivalent Rate

Objective To study the compare the measurement results and theoretical results of the accelerator room ambient dose equivalent rate,and explore the relationship between them.Methods Using tenth-value layer to estimate ambient dose equivalent rate of the accelerator room and according to the national standards' recommended method to test the accelerator room ambient dose equivalent rate.Results The measurement ambient dose equivalent rates of the accelerator rooms are less than that of the theoretical results,the measurement ambient dose equivalent rates of the primary shielding wall are 30.0%~56.0% smaller than that of the theoretical results.Conclusion It is feasible and safe to apply tenth.-value layer to estimate ambient dose equivalent rate of the accelerator room.