直线加速器泄露辐射及杂散测试

Test of linear accelerator leakage radiation and stray

摘要:

目的 通过检测型号为LA-6B 1802加速器的M区内外泄漏辐射水平和杂散并分析检测结果，评价该加速器的辐射防护安全性。方法 按照检测标准WS 674—2020，使用中检普泰1 000 cc球形电离室，PTW Unidose E型剂量仪和固体水，测量M区内外的泄漏辐射水平以及杂散。结果 该型号加速器M区内泄漏辐射率的范围为0.009%~0.016%，平均值漏辐射率为0.012%，M区外X射线泄漏辐射率的范围为0.013%~0.053%，平均值漏辐射率为0.022%，杂散水平也均小于58%。结论 该型号为LA-6B 1802加速器的辐射泄漏和杂散数据均满足标准WS 674—2020的标准要求。

关键词:LA-6B 1802加速器;泄漏辐射;M区;球形电离室;杂散

Abstract:

Objective The radiation protection safety of the LA-6B 1802 accelerator is evaluated by detecting and analyzing the leakage radiation level and stray radiation level.Methods Leak radiation levels from inside and outside the M zone were measured using a Zhongjian Putai 1000 cc spherical ionization chamber, and PTW Unidose E dosimeter with solid water according to the test standard WS 674-2020.Results The leakage radiation rate in the M area of this type of accelerator is 0.009% to 0.016%, the average leakage rate is 0.012%, the X-ray leakage rate in area M is 0.013% to 0.053%, the average leakage rate is 0.022%, and the stray level is also less than 58%.Conclusion The radiation leakage and stray data of the LA-6B 1802 accelerator meet the requirements of the standard WS 674-2020.

Key words:LA-6B 1802 accelerator;leakage radiation;M zone;spherical ionization chamber;stray