Measurement of indoor radon concentration in kindergartens in Sofia, Bulgaria

As a part of the systematic survey of indoor radon in Bulgaria, the indoor radon concentration was measured in 296 kindergarten buildings of Sofia city during 3 months (February to April 2013) using the CR-39 nuclear tract detectors. In 256 buildings at least two frequently occupied rooms (mainly pl...

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Bibliographic Details
Published in:Radiation protection dosimetry 2014-11, Vol.162 (1-2), p.163-166
Main Authors: Ivanova, Kremena, Stojanovska, Zdenka, Tsenova, Martina, Badulin, Viktor, Kunovska, Bistra
Format: Article
Language:English
Subjects:
Air Pollutants, Radioactive - analysis
Air Pollution, Indoor - analysis
Bulgaria
Humans
Polyethylene Glycols
Radiation Monitoring
Radiometry
Radon - analysis
Schools
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Summary:As a part of the systematic survey of indoor radon in Bulgaria, the indoor radon concentration was measured in 296 kindergarten buildings of Sofia city during 3 months (February to April 2013) using the CR-39 nuclear tract detectors. In 256 buildings at least two frequently occupied rooms (mainly playrooms) were observed. Altogether, 922 measurements were performed. The frequency distribution was well described by the lognormal function. The measured radon concentrations range between 9 and 1415 Bq m(-3) with a geometric mean of 101 Bq m(-3) (2.08) and an arithmetic mean 132 Bq m(-3) with a standard deviation of 118 Bq m(-3). The radon concentrations obtained in this survey were compared with that in Sofia city dwellings obtained from a previous study. A detailed statistical analysis of the building factors was presented.
ISSN:0144-8420
1742-3406
DOI:10.1093/rpd/ncu251