An exploration of shielding optimization for self-shielded accelerators
10.13491/j.issn.1004-714X.2022.04.003
- VernacularTitle:自屏蔽加速器屏蔽防护优化探讨
- Author:
Deqin ZHANG
1
;
Yi PAN
1
;
Xiaohong DU
1
;
Lantao LIU
1
Author Information
1. Beijing Institute of Occupational Disease Prevention and Treatment (The Beijing Prevention and Treatment Hospital of Occupational Diseases For Chemical Industry), Beijing 100093 China.
- Publication Type:OriginalArticles
- Keywords:
Self-shielding;
Linear accelerator;
Shielding design;
Monte Carlo simulation
- From:
Chinese Journal of Radiological Health
2022;31(4):401-405
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the room layout and shielding of three types of self-shielded accelerators, and to provide a basis for optimizing the shielding design of rooms for self-shielded accelerators. Methods We compared the radiation shielding levels (transmitted radiation dose rate outside the primary barrier and scattered radiation dose rate outside the secondary barrier) of three self-shielded accelerator rooms by Monte Carlo simulation and empirical formula calculation. Results According to Monte Carlo simulation and empirical formula calculation, for the Unity MR Linac accelerator, the scatter radiation dose rate outside the secondary barrier was significantly higher (up to five times) than the transmitted primary radiation dose rate outside the primary barrier. The scatter radiation dose rate of the cross section was significantly higher than that of the sagittal section for both Unity MR Linac and TOMO accelerators. Conclusion The differences in the shape, material, and thickness of self-shielding structures complicate the shielding calculation and design for accelerator rooms. The shielding calculation method should be improved to optimize the radiation shielding of novel accelerator rooms.
