METHODS AND MEANS OF RADON PROTECTION IN OPERATED BUILDINGS
Statement of the problem. The problem of reducing the annual individual radioactive dose in existing buildings is formulated and solved to achieve safe and comfortable indoor conditions. Results. The «volley» character of the radon transportation into the lower floors is determined while investigating the dynamics of radon levels in lower premises. The main source of indoor radon is a geological space under a building. Consequently, protective measures have a maximum effect in the immediate vicinity to the radon source, such as internal volume and the ventilation of the ground floor. The basic methods and means of reducing the external dose of natural radionuclides that are contained in building materials. The measures of the effectiveness of these measures are also presented. Conclusions. The technical methods of providing radiation safety of existing buildings as well as introducing the territorial reference levels of volumetric activity of radon would enable a reduction in the individual radiation dose per population.