Curguz, Zoran and Stojanovska, Zdenka and Ishikawa, T. and Omori, Y. and Mishra, Rosaline and Prajith, R. and Sapra, B.K. and Mayya, Y.S. and Bochicchio, Francesco and Carpentieri, Carmela and Tollefsen, Tore and Jovanovic, P. and Venoso, Gennaro and Kolaz, P and Bossew, Peter and Zunic, Zora S. (2014) Variability of radon and thoron equilibrium factors close to the wall in indoor environments of Banja Luka city (Republika Srpska). In: The Second International Conference on Radiation and Dosymetry in Various Fields of Research (RAD 2014) and the Second East European Radon Symposium (SEERAS), 27-30 May 2014, Nis, Serbia.
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Abstract
This paper presents the results of radon and thoron equilibrium factors obtained from long
term measurements of concentrations of radon, thoron and their progeny in different indoor
environment of Banja Luka city (Republic Srpska). The measurements were made in 35 dwellings
and 24 schools using CR-39 and LR-115 nuclear track detectors, exposed from April 2011 to May
2012. In schools the detectors were positioned about 8 – 10 cm away from walls and surfaces
which are potential sources of thoron exhalation, whereas this distance was about 3 – 10 cm in
schools. The obtained results for equilibrium factors can be described as log-normally distributed.
The geometric mean values (and geometric standard deviations) of radon and thoron equilibrium
factors were 0.17 (1.9) and 0.010 (2.2), respectively. The statistical analysis shows that the
difference between radon equilibrium factor obtained for dwellings and schools was not
significant. The geometric mean (geometric standard deviation) of thoron equilibrium factors in
dwellings, i.e. 0.013 (2.0), is higher than the one in schools, 0.008 (2.2), and this could be related
to the small differences in the detector positions with respect to the wall in schools and in
dwellings. The influences of the distance of the detector from the wall, as well as the ones of the
floor level, building materials and room type on equilibrium factor were analyzed.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Subjects: | Natural sciences > Physical sciences |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Zdenka Stojanovska |
| Date Deposited: | 11 Jun 2014 11:25 |
| Last Modified: | 30 Oct 2014 10:30 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/10040 |
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