Department of Physics, National Institute of Technology, Kurukshetra 136119, India.
J Environ Radioact. 2014 Jan;127:50-5. doi: 10.1016/j.jenvrad.2013.10.004. Epub 2013 Oct 22.
Building materials are the second major source of indoor radon after soil. The contribution of building materials towards indoor radon depends upon the radium content and exhalation rates and can be used as a primary index for radon levels in the dwellings. The radon flux data from the building materials was used for calculation of the indoor radon concentrations and doses by many researchers using one and two dimensional model suggested by various researchers. In addition to radium content, the radon wall flux from a surface strongly depends upon the radon diffusion length (L) and thickness of the wall (2d). In the present work the indoor radon concentrations from the measured radon exhalation rate of building materials calculated using different models available in literature and validation of models was made through measurement. The variation in the predicted radon flux from different models was compared with d/L value for wall and roofs of different dwellings. The results showed that the radon concentrations predicted by models agree with experimental value. The applicability of different model with d/L ratio was discussed. The work aims to select a more appropriate and general model among available models in literature for the prediction of indoor radon.
建筑材料是仅次于土壤的室内氡的第二大来源。建筑材料对室内氡的贡献取决于镭含量和氡析出率，可作为住宅内氡水平的主要指标。许多研究人员使用不同研究人员提出的一维和二维模型，根据建筑材料的氡通量数据来计算室内氡浓度和剂量。除了镭含量外，表面的氡壁通量强烈取决于氡扩散长度（L）和墙壁（2d）的厚度。在本工作中，使用文献中可用的不同模型计算了从测量的建筑材料氡析出率得出的室内氡浓度，并通过测量对模型进行了验证。比较了不同模型预测的氡通量的变化与不同住宅的墙壁和屋顶的 d/L 值。结果表明，模型预测的氡浓度与实验值相符。讨论了不同模型与 d/L 比值的适用性。这项工作旨在从文献中可用的模型中选择一个更合适和通用的模型，用于预测室内氡。
