Landman K A, Cohen D S
Health Phys. 1983 Mar;44(3):249-57. doi: 10.1097/00004032-198303000-00005.
A model involving the use of line sources is developed to describe the transport of radon through the cracks or gaps which appear in concrete slabs used in building foundations. The strength of these sources is determined from the results of the diffusion model proposed by Landman in a previous work. Once the strength of the source is known, additional transport mechanisms can be treated in a simple manner. Pressure differences across the slab and in the underlying soil are discussed. The rate of exhalation through a portion of the cracked slab is determined and compared to the rate of exhalation from the same surface area of bare soil. In typical cases, their ratios vary from 0.25 to 0.50. Therefore, these transport mechanisms account for a larger portion of the levels of radon found in many houses than do previous models.
开发了一个涉及使用线源的模型，以描述氡通过建筑基础中混凝土板出现的裂缝或间隙的传输。这些源的强度根据兰德曼在先前工作中提出的扩散模型的结果来确定。一旦源的强度已知，就可以以简单的方式处理其他传输机制。讨论了混凝土板和下层土壤中的压力差。确定了通过部分开裂混凝土板的呼气速率，并与裸露土壤相同表面积的呼气速率进行比较。在典型情况下，它们的比率在0.25至0.50之间变化。因此，与以前的模型相比，这些传输机制在许多房屋中发现的氡水平中占更大的比例。
