| NUKLEONIKA 2004, 49(1):33-36
SEASONAL CHANGEABILITY OF INDOOR RADON CONCENTRATIONS
IN ONE-FAMILY HOUSE
Maria Karpińska, Zenon Mnich, Jacek Kapała, Krzysztof Antonowicz
Department of Biophysics, Medical University of Białystok,
2A Mickiewicza Str., 15-089 Białystok, Poland
Indoor radon concentration undergoes 24-hour and seasonal changes. The paper presents first in Poland
results of radon concentration changeability in one building during the whole year. We performed 103
measurements of indoor radon concentrations. The following parameters of radon concentration distribution
were obtained: arithmetic mean – 224.1 Bq m-3, geometric mean – 194.5 Bq m-3,
median – 207 Bq m-3, and geometric standard deviation – 1.84. The minimum observed value was
22 Bq m-3 and the maximum – 748 Bq m-3. We determined the monthly and annual values
of radon concentrations. The values for particular months are in the range of 0.5 to 1.6 of the annual
mean. We observed a correlation between the mean radon concentrations in the examined buildings and
the differences in the mean values of indoor (R = 0.91, p < 0.05) and outdoor temperatures
(R = -0.91, p < 0.05). There was also a connection between the radon concentration inside
the buildings and the changes in atmospheric pressure.
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