2020年自贡市饮用水水源的总放射性调查及年有效剂量估计  

Gross radioactivity level and effective dose estimation of drinking water sources in Zigong City of Sichuan Province 2020

作　　者：胡涵[1] 刘科[1] 陈泓秀 梅玉琴 刘天洁 许寒[1] HU Han;LIU Ke;CHEN Hong-xiu;MEI Yu-qin;LIU Tian-jie;XU Han(Zigong Center for Disease Control And Prevention,Zigong 643000,Sichuan Province,China;Public Health Center of Sichuan Tianfu New Area,Chengdu 610213,Sichuan Province,China.)

机构地区：[1]自贡市疾病预防控制中心,四川自贡643000 [2]四川天府新区公共卫生中心,成都610213

出　　处：《职业卫生与病伤》2022年第4期238-242,共5页Occupational Health and Damage

摘　　要：目的调查自贡市饮用水水源中总α、总β的活度浓度,收集本底数据,以保障饮水安全和公众健康。方法2020年按照《生活饮用水标准检验方法放射性指标》(GB/T 5750.13-2006)采用XH-1000低本底α/β测量仪测定自贡市所有区县饮用水中的总α、总β的活度浓度,并根据监测结果进行剂量估计。不同类型水源水之间总α、总β的活度浓度差异采用符号秩和检验进行分析,检验水准为α=0.05。结果自贡市饮用水水源中的总α的活度浓度为0.106 Bq/L(0.008~0.438 Bq/L),总β的活度浓度为0.166 Bq/L(0.036~0.844 Bq/L),均低于《生活饮用水标准》(GB 5749-2006)中的放射性指标指导值,通过估算,饮用水所致居民受到的总α内照射年有效剂量为21.6μSv(1.6~89.5μSv),总β内照射年有效剂量为0.75μSv(0.16~3.82μSv),低于WHO推荐的个人剂量标准。结论自贡市饮用水水源中的总α和总β放射性水平处于环境正常本底范围。Objective To investigate the grossαandβactivity concentrations in drinking water sources of Zigong City and accumulate the environmental background,so that to ensure the drinking water safety and public health.Methods The activity concentrations of grossαandβwere measured with the low backgroundα/βcounter(XH-1000)according to“Standard Examination Methods For Drinking Water-radiological Parameters”(GB/T 5750.13-2006),and the results were used to estimate effective dose.The differences of grossαand totalβconcentrations in different source water were analyzed by sign rank sum test,and the level of significance was 0.05.Results The activity concentrations of grossαandβwere 0.106 Bq/L(0.008~0.438 Bq/L)and 0.166 Bq/L(0.036~0.844 Bq/L),respectively.Both of them were below the guidance value set by“Standards of Drinking Water Quality”(GB 5749-2006).The annual effective doses of internal exposure were estimated to be 21.6μSv(1.6~89.5μSv)and 0.75μSv(0.16~3.82μSv)for the grossαandβactivities respectively,and they were also below individual dose criteria which the WHO recommended.Conclusions The gross radioactivity level in drinking water sources of Zigong City is within the normal background range.

关 键 词：自贡市 饮用水水源 总放射性 年有效剂量 

分 类 号：R123.1[医药卫生—环境卫生学]