Analysis of the spatial variation of indoor radon concentrations (national survey in Bulgaria)
Analysis of the spatial variation of indoor radon concentrations (national survey in Bulgaria)
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DOI：
10.1007/s11356-019-04163-9
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发表时间：
2019-01
影响因子：
5.8
通讯作者：
K. Ivanova;Z. Stojanovska;B. Kunovska;N. Chobanova;V. Badulin;A. Benderev
中科院分区：
文献类型：
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作者：
K. Ivanova;Z. Stojanovska;B. Kunovska;N. Chobanova;V. Badulin;A. Benderev
本文介绍了保加利亚国家氡调查的方法和结果及其空间变异性。这些测量是在2015年4月至2016年3月的连续9个月和3个月期间使用CR-39轨道探测器在2778个住宅中进行的。室内氡浓度的算术平均值（AM）为111 ± 105 Bq/m3，几何平均值（GM）为81 Bq/m3（GSD = 2.15）。数据的分布被认为是对数正态分布。本文研究了两个假设。第一个是室内氡浓度的空间变化，第二个是影响氡变化的因素的空间性。28个地区的室内氡浓度存在显著差异，证实了第一种假设。的因素，地质（大地构造单元，岩石类型，断层距离的测量站点），类型的区域，并在建筑物上的氡空间变化的基础上的存在的影响，进行了检查。分析表明，它们显着影响氡的变化，但相对较小的贡献相比，地区之间的氡变化。此外，各地区调查因子的显著性和贡献度不同，证实了第二个空间性假说。
This paper presents the methodology and results of the national radon survey in Bulgaria and its spatial variability. The measurements were carried out in 2778 dwellings using CR-39 track detectors over two successive 9 and 3-month periods from April 2015 to March 2016. The arithmetic (AM) and geometric (GM) means of annual indoor radon concentration were 111 ± 105 Bq/m3and 81 Bq/m3(GSD = 2.15), respectively. The distribution of data has been accepted to be log-normal. Two hypotheses have been investigated in the paper. The first one was a spatial variation of indoor radon concentration and the second was spatiality of the factor that influences radon variation. The indoor radon concentrations in the 28 districts have been significantly different, which prove the first hypothesis. The influence of the factors, geology (geotectonic unit, type of rock, and faults distance of the measuring site), type of the region, and the presence of the basement in the building on radon spatial variation, was examined. The analyses have been shown that they significantly affect radon variations but with a relatively small contribution in comparison to the radon variation between district. Furthermore, the significance and contribution of the investigated factors were different in each district, which confirmed the second hypothesis for their spatiality.