Radon concentration measurements were performed in all 25 primary schools in Banja Luka city, the capital of Republika Srpska, during 2011 and 2012, using both active RAD7 continual radon measuring instruments and CR-39 passive (commercially known as Gamma) detectors. The two complimentary methods were employed not only to obtain annual averages, but also to study the dynamics of radon concentration changes during the week. For each school, average and temporal variations of radon concentrations were analysed, taking into consideration local geology, building materials and meteorological conditions. The influence of forced ventilation, caused by frequent opening of doors and windows during working hours, with typical dawn and weekend peaks is evident in most but not all schools. Elevated levels of radon concentration (>400 Bq m-3) were found in a few schools using both methods. Although high correlation factor of 0.8 between passive and active methods was found, still short-time (one-week) measurements cannot be used for annual estimation of radon activity but screening one. Thus, the conclusion concerns only long time measurements as valid indicator of annual radon activity.
CURGUZ Z;
ZUNIC Zora S.;
TOLLEFSEN Tore;
JOVANOVIC Peter;
NIKEZIC D;
KOLARZ P;
2013-07-11
EDITURA ACAD ROMANE
JRC76534
1221-146X,
http://www.nipne.ro/rjp/2013_58_Suppl/0090_0098.pdf,
https://publications.jrc.ec.europa.eu/repository/handle/JRC76534,
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