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核技术  2014 

气球法测氡仪在室内氡浓度评价中的应用

DOI: 10.11889/j.0253-3219.2014.hjs.37.080201, PP. 80201-80201

Keywords: 气球法测氡仪,氡浓度,年有效剂量

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Abstract:

借助气球法测氡仪调查成都某高校实验楼内氡浓度大小，并估算楼内氡气所致不同人群的年有效剂量，按照标准《室内氡及其衰变产物测量规范》(GBZ/T182-2006)中的要求进行布点和剂量估算。结果表明：实验楼的氡浓度的平均值为20.99±13.87Bq?m?3，符合标准《电离辐射防护与辐射源安全基本标准》(GB18871-2002)中关于室内氡浓度的要求，室内氡浓度的大小与房间建筑面积有一定关系；楼内氡致科研工作者的年有效剂量最高位0.24mSv，低于世界平均值(1.2mSv)；楼内氡气致人群的年有效剂量处于正常本底水平，氡及其子体并未造成附加剂量。气球法测氡仪操作简单、便携性好，基于气球法测氡仪的直接刻度方法能在无标准氡室的情况下，计算出测氡仪的刻度系数在误差范围内，用此种方法计算出的刻度系数基本能满足实际测量的要求。

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