Study on the optimization of radiation protection for therapeutic proton synchrotron
10.3760/cma.j.issn.0254-5098.2019.09.013
- VernacularTitle: 质子加速器治疗室辐射防护优化研究
- Author:
Weiguo ZHU
1
;
Jing LIANG
1
;
Changsong HOU
1
;
Dexing LIAN
1
;
Zhen ZHANG
2
Author Information
1. Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China
2. National Center for Occupational Safety and Health, NHC, Beijing 102308, China
- Publication Type:Journal Article
- Keywords:
Monte Carlo simulation;
Therapeutic proton accelerator;
Barrier;
Ambient dose equivalent rate
- From:
Chinese Journal of Radiological Medicine and Protection
2019;39(9):707-710
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect of iron shield at different depths within main protection wall on the dose rate outside the protection wall.
Methods:By adopting the FLUKA code, a therapeutic room model was constructed with its primary protective barrier consisting of concrete and iron. In order to obtain its ambient dose equivalent rate distribution, the 250 MeV protons and 220 MeV protons impinging on water phantom were simulated separately.
Results:With varying depth of iron plate embedded in barrier, the ambient dose equivalent rates in the two simulated conditions differed sinificantly at 30 cm outside the protection wall. The maximum ambient dose equivalent rate(220 MeV: 3.42 μSv/h, 250 MeV: 6.39 μSv/h) was more than 2 times higher than the minimum ambient dose equivalent rate(220 MeV: 1.75 μSv/h, 250 MeV: 3.32 μSv/h).
Conclusions:In the design of therapeutic proton accelerator, it is essential to evaluate carefully the location where the iron shield is in main protection wall.
