Varley N R, Flowers A G
Institute de GeoFísica, Ciudad Universitaria, Coyoacán C.P. México DF, México.
Health Phys. 1998 Jun;74(6):714-8. doi: 10.1097/00004032-199806000-00009.
This study of radon levels in southwest England investigates the correlation between indoor and soil gas radon concentrations and considers the influence of geology, meteorological variables, spatial and depth variations. This paper examines the value of soil gas measurements as an indicator of potential indoor radon concentrations and highlights a number of factors that need to be considered. Only a very weak correlation was obtained between the overall 222Rn concentration in soil gas and inside the home. However, for high soil gas concentrations a stronger correlation with the indoor level was observed. Typically, the soil gas concentration was between a factor of 10 and 1,000 times greater than that indoors. Levels as low as 10 kBq m(-3) in the soil could produce an indoor concentration above the UK action level of 200 Bq m(-3). The moisture content and the inhomogeneity of soil permeability were identified as chiefly responsible for any perturbation of a soil gas concentration associated with a particular geology. Alone, measured soil gas concentrations have only a limited use in the prediction of indoor 222Rn concentrations.
这项针对英格兰西南部氡气水平的研究调查了室内与土壤气体氡浓度之间的相关性，并考虑了地质、气象变量、空间和深度变化的影响。本文探讨了土壤气体测量作为潜在室内氡浓度指标的价值，并强调了一些需要考虑的因素。土壤气体中的总体222Rn浓度与室内浓度之间的相关性非常弱。然而，对于高土壤气体浓度，观察到与室内水平有更强的相关性。通常，土壤气体浓度比室内浓度大10到1000倍。土壤中低至10 kBq m(-3)的水平可能会使室内浓度高于英国200 Bq m(-3)的行动水平。土壤湿度和土壤渗透率的不均匀性被确定为与特定地质相关的土壤气体浓度任何扰动的主要原因。仅测量的土壤气体浓度在预测室内222Rn浓度方面的用途有限。
