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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。
Aim To compare the theoretical calculation results of the dose equivalent ratio around the accelerator room with the actual measurement results, and to explore the relationship between them and their causes. Methods The one-tenth layer method was used to estimate the dose equivalence ratio around the main and secondary shielding walls of the accelerator room. The dose equivalence rate around the main and secondary shielding walls of the accelerator room was detected according to the recommended detection methods of the relevant national standards. Results The actual measurement results of the dose equivalent ratio around the accelerator room were all less than the theoretical calculation results. The measurement results of the dose equivalent ratio around the main shield wall were 30.0% ~ 56.0% smaller than the theoretical calculation results. Conclusion It is feasible and safe to use the one-tenth of the method to estimate the dose-equivalent ratio around the accelerator room.