摘要
目的提供评价与设计核医学槽式衰变池容积的计算方法,为医疗机构、环境影响评价机构和管理部门等提供技术参考。方法通过构建数学模型并推导计算式,建立槽式衰变池容积与废水放射性水平之间的关系。结果不同医疗机构的核医学科患者诊疗量、核素使用量以及废水产生量等存在差异,槽式衰变池的评价与设计的结果也不相同,但结果均应符合GB18871-2002和HJ1188-2021标准要求:每月排放的总活度≤10 ALI_(min),每一次排放的活度≤1 ALImin;总α≤1 Bq/L、总β≤10 Bq/L、^(131)I活度浓度≤10 Bq/L。放射性废水注满后暂存时间≥10倍最长半衰期,^(131)I住院治疗废水暂存时间≥180 d。结论本文提供的计算方法可用于核医学槽式衰变池容积的评价与设计。
Objective To provide the calculation method for evaluating and designing the volume of nuclear medicine intermittent decay pool,so as to provide technical reference for medical institutions,environmental impact assessment institutions and management departments,etc.Methods By constructing a mathematical model and deriving the calculation formula,the relationship between the volume of intermittent decay pool and the radioactivity level of wastewater was established.Results There were differences in the number of diagnosis and treatment of patients,the amount of nuclide used and the amount of waste water produced in the nuclear medicine department at different medical institutions,so the evaluation and design of the intermittent decay pool were also different as a result.But the result should meet the relevant requirements of the standards GB 18871-2002 and HJ 1188-2021:the total activity discharged every month≤10 ALI_(min),and the activity discharged once≤1 ALI_(min);gross alpha activity≤1 Bq/L,grossβactivity≤10 Bq/L,^(131)I activity concentration≤10 Bq/L;the temporary storage time after filled with radioactive wastewater≥10 times longest half-life,and the temporary storage time of ^(131)I in patient waste water≥180 d.Conclusions The calculation method provided in this paper can be used to evaluate and design the volume of intermittent decay pool in nuclear medicine departments.
作者
杨勇
Yang Yong(Beijing Nuclear and Radiation Safety Center,Beijing 100089,China)
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2022年第3期219-224,共6页
Chinese Journal of Radiological Medicine and Protection
关键词
核医学
放射性废水
槽式衰变池
Nuclear medicine
Radioactivity waste water
Intermittent decay pool
