摘要
目的掌握泸州市地表γ辐射剂量率水平和分布情况,初步建立泸州市放射性本底数据库,为核与辐射安全事故预警和风险评估提供数据支持。方法按照《辐射环境监测技术规范》《环境地表γ辐射剂量率测定规范》的要求,2017年6月—2018年12月,通过IN-NA-25型智能化X、γ辐射仪监测全市129个乡镇不同地点类型的地表γ辐射剂量率水平,使用SPSS 17.0软件对数据进行统计分析。结果泸州市地表γ辐射剂量率水平在52.9~148.7 nGy/h之间,平均值为103.6 nGy/h;不同区县、不同类型地点间的地表γ辐射剂量率均不同;泸州市环境γ辐射对居民产生的人均年照射有效剂量当量在0.32~1.11 mSv之间,均值为0.64 mSv。结论泸州市地表γ辐射剂量略高于全国和世界平均水平,居民所受年有效剂量当量低于公众照射年剂量当量限值(1.0 mSv),人居环境不受影响,适合人类居住。
Objective To master the surface gamma radiation dose rate level and distribution in Luzhou City,to preliminarily establish the Luzhou radioactivity background database,and provide data support for nuclear and radiation safety accident warning and risk assessment.Methods Accorded to the requirements of the Technical criteria for radiation environmental monitoring and the Norm for measurement of environmental terrestrial gamma radiation dose,IN-NA-25 Intelligent X,γradiometer were used to monitor the surface gamma radiation dose of different types of locations in 129 townships from June 2017 to December 2018,and the data were statistically analyzed by SPSS 17.0.Results The surface gamma radiation dose rate levels in Luzhou City were 52.9-148.7 nGy/h,with the average value of 103.6 nGy/h.There were statistically significant differences in the surface gamma radiation dose rate among different districts,and different types of locations.The annual effective dose equivalent per capita of exposure to environmental gamma radiation was 0.32-1.11 mSv in Liuzhou City,with an average value of 0.64 mSv.Conclusion The surface gamma radiation dose of Luzhou City is slightly higher than the national and world average,and the annual effective dose per capita is lower than the public exposure annual dose equivalent limit of 1.0 mSv,therefore the living environment is not affected and is suitable for human habitation.
作者
刘露
吴田勇
苏勤
朱红心
LIU Lu;WU Tian-yong;SU Qin;ZHU Hong-xin(Department of Health Monitoring,Luzhou Municipal Center for Disease Control and Prevention,Luzhou Sichuan,646000,China;Department of Chronic Noncommunicable Diseases Prevention,Luzhou Municipal Center for Disease Control and Prevention,Luzhou Sichuan,646000,China)
出处
《职业与健康》
CAS
2020年第21期2970-2973,共4页
Occupation and Health
关键词
地表γ辐射
剂量率
人均年有效剂量
Surface gamma radiation
Dose rate
Annual effective dose per capita
