泾川县居民住宅内氡浓度水平调查

INVESTIGATION ON RESIDENTIAL RADON CONCENTRATION IN JINGCHUAN COUNTY

本文介绍2004年3月至2006年11月对甘肃省泾川县居民住宅内氡水平的调查结果。采用α径迹蚀刻法(ATD)测量室内氡浓度,同时用问卷方式调查了全县住宅的结构类型及各类住宅的居住人口百分比。结果表明,在被调查的62个房间中,平均氡浓度为96.2 Bq/m3,明显高于文献报道的全国平均值;在各类住宅中,窑洞内的氡浓度较高,48间窑洞的平均氡浓度为110 Bq/m3,其中地坑窑和半明半暗窑中的氡浓度更高。泾川当地有相当数量的农村居民居住窑洞,应引起注意,采取适当的防护措施。

This paper reports an investigated result of residential radon concentration in Jingchuan County, Gansu Province, during May 2004 to November 2006. Alpha track detectors were used to measure radon level. Construction types of house and percentages of residents living in the county were also investigated through questionnaires. The result showed that the mean radon concentration in 62 investigated houses was 96.2 Bq · m^-3. The radon concentration in cave dwelling was the highest among all type of dwellings. The average level in cave dwelling is 110.2 Bq · m^-3, which was significantly higher than the national mean value published in literatures, and exceed the WHO recommended value of 100 Bq · m^-3. A considerable number of rural residents are living in cave dwellings in Jingchuan County. Attention should be paid to the radon problem and some proper protection measures taken.