不同方法对X射线机房的屏蔽优化分析

摘要

Objective To introduce two different shielding calculation method of X-ray room, and to provide a theoretical basis for the future work of X-ray room of calculating the maximum number of patient per week with using the actual main and secondary shielding wall statistics. Methods According to some relevant standards of GBZ130-2002 and NCRP147 and two different calculation method of X-ray simulation engine room, we can reversely calculate the maximum actual work-ing load and assure radiation workers and members of the public in the surrounding areas receives doses within limits by analysting those statistic. Conclusion At present, the workload and the environmental radiation levels outside X-ray room of Hunan Cancer Hospital are all within the limits , so we can concluded the shielding design meet national requirement and its protective effects are satisfactory, and safe and reliable.%目的：介绍两种不同的X射线机房的屏蔽计算方法，并根据目前肿瘤医院的主、副屏蔽墙的厚度，利用不同的计算方法反推医院X射线模拟机房的实际的最大工作负荷量以及每周的病人数量，为今后X射线机房的工作安排提供理论依据。方法根据GBZ130-2002和NCRP147号报告等相关标准和法规的要求，以湖南省肿瘤医院为依托，根据两种屏蔽计算方法对X射线模拟机房进行最大工作负荷量反推。以计算结果为理论依据确定今后实际工作过程中X射线模拟机房的极限工作量，确保放射性工作人员和公众成员在机房周围地区的留居所受的个人最大剂量在国家规定的基本限值以下。结论目前湖南省肿瘤医院的工作负荷量在屏蔽设计的限制之内，医院的机房外环境辐射水平均能达到国家标准要求，且基本上接近天然辐射本底水平，其防护效果都十分满意，且安全、可靠。