摘要
目的 通过研究我国各类房屋中氡浓度的水平和分布 ,探讨适合我国国情的室内氡浓度的行动水平。方法 应用累积测量技术进行室内氡浓度的测量。结果 我国 18个城市普通房屋 (n =2 117)中氡浓度的算术平均值为 44 1Bq·m- 3 ,其中超过 10 0Bq·m- 3 、2 0 0Bq·m- 3 和 40 0Bq·m- 3 的房屋分别占测量总数的 6 5%、1 0 %和 0 1%。煤渣砖建筑物、窑洞和地下建筑物分别有14 1%、16 7%、2 7 3 %和 2 3 %、3 0 %、4 0 %的房间中氡浓度超过 2 0 0Bq·m- 3 和 40 0Bq·m- 3 。我国2 0个省市实测的平衡因子均值为 0 49。结论 建议氡行动水平的单位由平衡等效浓度改为氡的实测浓度 ;取消新建住房和已有住房的划分 ;在未进行国家氡水平调查前 ,我国室内氡的行动水平可继续沿用GB T 1614 6 1995给出的已有住房 40 0Bq·m- 3
Objective To research the national indoor radon actio n level by studying level and distribution of radon in different type of dwellin gs. Methods Integral detection technology was used to measure indoor radon concentration. Results Arithmetic mean of indoor radon concentration was 44 1 Bq·m -3 (n=2117 )in 18 cities.The percentages of rooms,in which radon concentration was above 10 0 Bq·m -3 ,200 Bq·m -3 and 400 Bq·m -3 ,were 6 5%,1 0% and 0 1%,respectively.In coal ash brick buildings,cave dwellings and underground bui ldings,the percentages of room radon concentrations above 200 Bq·m -3 ,400 Bq·m -3 were 14 1%,16 7%,27 3% and 2 3%,3 0%,4 0%,respectively.T h e equilibrium factor was 0 49 averagely from 20 pro-vinces and cities. C on clusion For the unit of indoor radon action level,radon concentration sho uld be used instead of EEC(equilibrium equivalence radon concentration),and the distinction between the existing dwellings and newly built dwellings is to be ab olished.Before a nationwide survey of radon level,the control value for indoor r adon action level of 400 Bq·m -3 for existing houses of our country given by GB/T 16146-1995 can be used continuously.;
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2003年第6期462-465,共4页
Chinese Journal of Radiological Medicine and Protection
