Field experience with Direct Radon and Thoron Progeny Sensors (DRPS/ DTPS) results being distributed in the Balkan Region

Mishra, Rosaline and Zunic, Zora S. and Stojanovska, Zdenka and Curguz, Zoran and Gulan, Ljiljana and Vaupotic, Janja and Veselinovic, Nenad and Kolarz, P. and Milic, Gordana and Kovacz, Tibor and Sapra, B.K. (2017) Field experience with Direct Radon and Thoron Progeny Sensors (DRPS/ DTPS) results being distributed in the Balkan Region. In: Third East-European Radon Symposium, 15-19 May 2017, Sofia,Bugarija. (Unpublished)

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Abstract

Purpose: This paper reports the results of the international collaboration on direct measurements of radon (Rn) and thoron (Tn) progeny in in- door environments (dwellings and schools) in some parts of the whole of Balkan region (Serbia with Kosovo, Republic of Srpska, Slovenia and Macedonia). Argumentations: Direct and time integrated measurements of Rn and Tn progeny were carried out using direct Radon and Thoron Progeny Sensors (DTPS and DRPS), which are basically deposition based progeny sensors, in which the deposited progeny activity is detected by SSNTDs. These are passive detectors meant for long term time integrated measurements. The progeny or the decay products of Rn and Tn are the major dose givers. While assessing the inhalation doses to the public, pas- sive long term measurements are essential. Large scale Rn and Tn decay product monitoring was carried out in dwellings (appr.300) during a period 2011-2013, in each house for minimum 6 months up to one year (Serbia with Kosovo, Republic of Srpska, Slovenia) and/or 68 schools (Republic of Srpska, Macedonia). In Kosovo 40 houses were monitored for 2 two different seasons, one during December – May 2011 and the other May – December 2012. In Slovenia 100 houses were monitored for progeny concentration during 2011-2012. The results are further discussed. Conclusion: The overall analysis of around 400 detectors deployed showed t • Both EETC and EERC obtained using DTPS and DRPS respectively showed a log normal distribution pattern. • The overall GM of EETC was obtained as 0.69 Bq/m3 with a GSD of 2.0; • The GM of EERC was obtained as 11.02 Bq/m3 with a GSD of 2.6; • In Kosovo during the winter December to May 2011, the EERC and EETC were twice that during May to December 2012. • A remarkable finding is the positive correlation between EERC and EETC, while there is none for the parents Rn and Tn. . The average EERC and EETC were measured as 11.31 ± 3.2 and 0.34 ± 0.22 Bq/m3 respectively. Decay product monitoring was carried out in 43 schools of Macedonia. The geometric mean values (and geometric standard deviation) of EERC and EETC were 27 Bq/m3(1.4) and 0.75 Bq/m3(1.4) respectively. The results are further discussed.

Item Type: Conference or Workshop Item (Poster)
Subjects: Natural sciences > Physical sciences
Divisions: Faculty of Medical Science
Depositing User: Zdenka Stojanovska
Date Deposited: 20 Jun 2017 14:02
Last Modified: 20 Jun 2017 14:02
URI: http://eprints.ugd.edu.mk/id/eprint/17947

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