核安全2026，Vol.25Issue(3)：53-56,4.DOI:10.16432/j.issn.1672-5360.2025112401
医用重离子加速器补偿器辐照后放射性分析
Analysis of Induced Radioactivity in Irradiated Compensators from Medical Heavy Ion Accelerators
张福元 1叶延程 1张雁山 1马霄云 1李青峰 1马彤1
作者信息
摘要
Abstract
To evaluate the induced radioactivity level and disposal approach of compensators used in the uni-form scanning mode of medical heavy-ion therapy,this study conducted a quantitative analysis of activation products and their activities through source term analysis,literature review,and theoretical calculation.The results show that after a typical clinical treatment course(carbon ion energy 120～400 MeV·u-1,total irradia-tion time 1050 s),the main induced radionuclides in the compensator are 11C and 7Be.The total activity at the end of irradiation is about 3.36×105 Bq,dominated by 11C.After a cooling time of 6.8 hours,11C has almost completely decayed,and the activity of 7Be remains at approximately 4.97×102 Bq,which is far below the ex-emption limit(1×107 Bq)specified in the"Basic Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources"(GB 18871-2002).Therefore,with approval from the regulatory authority,such compensators can be disposed of as conventional waste without being managed as radioactive waste.关键词
医用重离子加速器/豁免/补偿器/废物处置/放射性Key words
medical heavy ion accelerator/exemption/compensator/waste disposal/induced radioactivity分类
医药卫生引用本文复制引用
张福元,叶延程,张雁山,马霄云,李青峰,马彤..医用重离子加速器补偿器辐照后放射性分析[J].核安全,2026,25(3):53-56,4.
