台山市某地块环境放射性水平研究

Environmental Radioactivity Levels at a Plot in Taishan, Guangdong Province

本文主要测量了广东省台山市某地块的现场地面γ强度、空气氡浓度、土壤氡浓度、水中氡浓度 ,以及水中微量元素。结果表明 ,测区内大部分区域地面γ强度为 2 5 6 .1～ 5 2 2nGy h ,个别地段的地面γ强度大于5 2 2nGy h ;测区内水中氡浓度一般为 0 .2 8～ 5 .31kBq m3 ,个别大于 10kBq m3 ;测区内土壤中氡浓度较高。分析表明 ,测区内地面γ强度和氡浓度偏高的原因除了与地质因素有关外 ,还与地形等因素有关。最后对该地块放射性水平作出综合评价 。

Surface γ-intensities and radon concentrations in air, water and soil, were measured in site at a plot in Taishan, Guangdong province. Rare earth elements were also determined in water samples. The results revealed that surface γ-intensities in majority of the studied area were between 256.1 and 522 nGy/h, and higher than 522 nGy/h only in a few locations. Radon concentrations in water were between 0.28 and 5.31 kBq/m 3,with an exception of 10 kBq/m 3 in a well. Radon concentrations were also relatively high. The high levels of surface γ-intensities and environmental radon concentrations are related not only with the geological background, but with factors like landforms. A radioactivity assessment and relevant prevention measures were also discussed and presented.