Estimation of seasonal correction factor for indoor radon concentration in Slovakia. A preliminary survey

In this study, 56 rooms were monitored throughout the year in four stages based on 3-month indoor radon measurements. The first seasonal correction factors for Slovakia were determined. Factors for spring, summer, autumn and winter seasons were found to be 1.15 ± 0.25, 1.48 ± 0.31, 0.86 ± 0.18 and 0.78 ± 0.17, respectively. Calculated seasonal correction factors were tested by independent measurements in houses. The preliminary results show a good correspondence between measured and calculated annual mean indoor radon activity concentration. (author)