The influence of different building types on the activity concentration of Radon indoor is studied through transport models in soil and building materials. The numerical solutions of the relevant transport equations are solved by the finite differences method (FDM) and used to evaluate the indoor Radon activity concentration. Several boundary conditions are introduced to simulate the Radon entry into the buildings from soils and to assess the Radon activity concentration at the different floors. The types of dwelling investigated differ in the position of the lower floor respect to the ground. Comparisons are made to modeling assessments obtained considering different soil characteristics underneath the building and building materials to simulate indoor Radon activity concentration. These investigations lead to the conclusion that, in addition to the nature of the soil and building materials, the position of lower floor of dwellings plays a significant role in determining the amount of radon entry into residential buildings. This work is effective to assess the health hazards coming from the Radon accumulation in living environments.

通过土壤和建筑材料中的迁移模型研究了不同建筑物类型对Rad室内活动浓度的影响。通过有限差分法（FDM）求解了相关输运方程的数值解，并将其用于评估室内Rad活度浓度。引入了几种边界条件，以模拟from从土壤进入建筑物的情况，并评估Rad在不同楼层的活动浓度。研究的住宅类型在下层地板相对于地面的位置上有所不同。比较了在建筑物和建筑材料下考虑不同土壤特性的模拟评估结果，以模拟室内Rad活度浓度。这些调查得出的结论是，除了土壤和建筑材料的性质外，住宅较低层的位置在确定ra进入住宅建筑物中的数量方面也起着重要作用。这项工作有效地评估了living在生活环境中的积累对健康的危害。