Results from Time Integrated Measurements of Indoor Radon, Thoron and their Decay Product Concentrations in Schools in the Republic of Macedonia

Stojanovska, Zdenka and Zunic, Zora S. and Bossew, Peter and Bochicchio, Francesco and Carpentieri, Carmela and Venoso, Gennaro and Mishra, Rosaline and Rout, R.P. and Sapra, B.K. and Burghele, Bety D. and Cucos-Dinu, Alexandra and Boev, Blazo and Cosma, Constantin (2014) Results from Time Integrated Measurements of Indoor Radon, Thoron and their Decay Product Concentrations in Schools in the Republic of Macedonia. Oxford Journals. ISSN 1742-3406

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Abstract

As part of a survey on concentrations of radon, thoron and their decay products in different indoor environments of the Balkan region involving international collaboration, measurements were performed in 43 schools from 5 municipalities of the Republic of Macedonia. The time-integrated radon and thoron gas concentrations (CRn and CTn) were measured by CR-39 (placed in chambers with different diffusion barriers), whereas the equilibrium equivalent radon and thoron concentrations (EERC and EETC) were measured using direct radon–thoron progeny sensors consisting of LR-115 nuclear track detectors. The detectors were deployed at a distance of at least 0.5 m from the walls as well as far away from the windows and doors in order to obtain more representative samples of air from the breathing zone; detectors were exposed over a 3-month period (March–May 2012). The geometric mean (GM) values [and geometric standard deviations (GSDs)] of CRn, CTn, EERC and EETC were 76 (1.7), 12 (2.3), 27 (1.4) and 0.75 Bq m−3 (2.5), respectively. The equilibrium factors between radon and its decay products (FRn) and thoron and its decay products (FTn>0.5 m) were evaluated: FRn ranged between 0.10 and 0.84 and FTn>0.5 m ranged between 0.003 and 0.998 with GMs (and GSDs) equal to 0.36 (1.7) and 0.07 (3.4), respectively.

Item Type: Article
Subjects: Natural sciences > Matematics
Natural sciences > Other natural sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Blazo Boev
Date Deposited: 29 Aug 2014 13:55
Last Modified: 30 Oct 2014 10:25
URI: http://eprints.ugd.edu.mk/id/eprint/10812

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