Abstract
Radon and its progeny in the indoor air form more than 70 % of the annual individual radiation dose for a modern human; they are the second leading cause of lung cancer after smoking. Under such conditions ensuring of the buildings radon safety is an extremely important scientific and practical problem, which is especially relevant for projected constructions. In this case mathematical simulation is the only way to predict radon levels in the future. Soil under the building is the main source of radon entry in indoor air, therefore radon safety of building project is determined by the construction and condition of its underground walling. The article deals with the influence of the building structural features on the amount of radon load on underground walling as one of the main factors of the formation of the radon conditions in the building. Two-dimensional stationary model of diffusion radon transport in the system «soil-atmosphere-building» is used for the calculation of radon concentration fields in the soil air of the base of the building. The obtained fields of radon concentration in the soil air give an opportunity to estimate the changes in the radon field in the neighbourhood of the building.
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