Analytical model for calculation the radon-protective characteristics of underground walling. – 2018.

Abstract

Radon and its progeny in the indoor air form the biggest part of the human annual individual dose obtained from all sources of ionizing radiation. The greatest amount of radon enters into the building from the soil base, so the building degree of radon safety is determined by the underground walling shape. Mathematical modeling is the most effective tool used for the description of a multifactor process of radon entry from soil air into the buildings. The dominant mechanism of radon transportation into the soil and walling materials is the basis of any model of the radon situation formation in the building. Diffusive and advective (convective) transport mechanisms can dominate or make a significant joint contribution to the radon transport in certain conditions of the "ground-atmosphere-building" media system. Insufficient information about the magnitude and action direction of the large number of radon transport factors make it possible to simulate the radon entry under the limited conditions of the one transport mechanism dominance. The article deals with the approach to the assessment of the required radon-protective properties of underground enclosing structures under the assumption of stationary diffusion transfer of radon in porous media.