16 MeV医用回旋质子加速器测试间辐射安全研究

Radiation Safety Study of the Test Room for a 16 MeV Cyclotron Proton Accelerator

随着放射医疗技术的发展,医用回旋质子加速器在国内拥有广阔的市场前景。我国建设医用回旋质子加速器测试间,可提高进口医用回旋质子加速器投产效率。为保证测试间辐射安全性,本研究选取进口占比较大的16 MeV回旋质子加速器测试间作为研究对象,利用FLUKA软件建立靶件、屏蔽体及材料模型,设置粒子类型、能量、束流强度、束流损失率等参数,模拟测试间周围辐射剂量场分布。结果表明,测试间屏蔽体外侧30 cm处剂量率范围为0.146~1.801μSv/h,满足2.5μSv/h的剂量率限值要求。本研究方法及结果可为同类工程辐射安全分析提供参考。

With the development of radiomedical technology,medical cyclotron proton accelerators have broad market prospects in China.China’s construction of medical cyclotron proton accelerator test room can improve the production efficiency of imported medical cyclotron proton accelerator.In order to ensure the radiation safety of the test room,this paper selects the 16 MeV cyclotron accelerator test room with a large proportion of imports as the research object,using FLUKA software to establish the target,shield and material model,setting the particle type,energy,beam intensity,beam loss rate and other parameters,and simulateing the radiation dose field distribution around the test room.The results show that the dose rate range of 30 cm outside the test room is 0.146~1.801μSv/h,which meets the dose rate limit of 2.5μSv/h.The research methods and results of this paper can provide reference for the radiation safety analysis of similar engineering.