Study of Radon Content in Residential Premises of the Kachug Settlement in the Irkutsk Region

Abstract

The purpose is to assess the radon hazard of residential premises in Kachug settlement (Irkutsk Region). Materials and methods. In the period from December 2020 to May 2022, in 15 residential buildings of the Kachug settlement (Irkutsk Region), the equivalent equilibrium volumetric activity of radon was measured. The study was carried out on the basis of the methods incorporated in the instruments used (the SIRAD MR-106N detector-indicator and the KAMERA-01 measuring complex), as well as guidelines 2.6.1.037-2015 «Determination of the average annual equivalent equilibrium volumetric activity values of radon isotopes in indoor air based on the results of measurements of diff erent duration». Additionally, sampling and radiological analysis of drinking water from wells was carried out. Results and discussion. It was found that the values of radon equivalent equilibrium volumetric activity in residential buildings of Kachug settlement in 7 out of 15 investigated objects exceeded 200 Bq/m3. These objects are geographically connected to one street. The highest values of radon levels are recorded in the basement and decrease with increasing height, with some exceptions that can be explained by the involvement of radon in the general circulation of air in the room. The change of seasons, aff ecting the change of ventilation patterns, is refl ected in the decrease of equivalent equilibrium volumetric activity values in the spring-summer period compared to the autumn-winter period. The results of sampling from the wells indicate that the water conforms to sanitary and hygienic standards. Conclusion. To prevent the risk of adverse consequences, residents are recommended to take a number of measures that will reduce the levels of equivalent equilibrium volumetric activity of radon. An appeal to the Department of Rospotrebnadzor for the Irkutsk Region was formed in order to carry out further assessment of the compliance of residential buildings with the requirements of sanitary rules.