title: Long-term measurements of radon, thoron and their airborne progeny in 25 schools in Republic of Srpska.
abstract: This article reports results of the first investigations on indoor radon, thoron and their decay products concentration in 25 primary schools of Banja Luka, capital city of Republic Srpska. The measurements have been carried out in the period from May 2011 to April 2012 using 3 types of commercially available nuclear track detectors, named: long-term radon monitor (GAMMA 1)- for radon concentration measurements (C(Rn)); radon-thoron discriminative monitor (RADUET) for thoron concentration measurements (C(Tn)); while equilibrium equivalent radon concentration (EERC) and equilibrium equivalent thoron concentrations (EETC) measured by Direct Radon Progeny Sensors/Direct Thoron Progeny Sensors (DRPS/DTPS) were exposed in the period November 2011 to April 2012. In each school the detectors were deployed at 10 cm distance from the wall. The obtained geometric mean concentrations were C(Rn) = 99 Bq m(-3) and C(Tn) = 51 Bq m(-3) for radon and thoron gases respectively. Those for equilibrium equivalent radon concentration (EERC) and equilibrium equivalent thoron concentrations (EETC) were 11.2 Bq m(-3) and 0.4 Bq m(-3), respectively. The correlation analyses showed weak relation only between C(Rn) and C(Tn) as well as between C(Tn) and EETC. The influence of the school geographical locations and factors linked to buildings characteristic in relation to measured concentrations were tested. The geographical location and floor level significantly influence C(Rn) while C(Tn) depend only from building materials (ANOVA, p ≤ 0.05). The obtained geometric mean values of the equilibrium factors were 0.123 for radon and 0.008 for thoron.
authors.affiliation: University of East Sarajevo, Faculty of Transport and Traffic Engineering, Vojvode Mišića 52, 74000 Doboj, Bosnia and Herzegovina.
authors.forename: Z
authors.initials: Z
authors.lastname: Ćurguz
authors.affiliation: Goce Delcev University, Faculty of Medical Sciences, Stip, Republic of Macedonia.
authors.forename: Z
authors.initials: Z
authors.lastname: Stojanovska
authors.affiliation: Institute of Nuclear Sciences "Vinča", University of Belgrade, 11000 Belgrade, Serbia.
authors.forename: Z S
authors.initials: ZS
authors.lastname: Žunić
authors.affiliation: University of Belgrade, Institute of Physics, Serbia.
authors.forename: P
authors.initials: P
authors.lastname: Kolarž
authors.affiliation: Fukushima Medical University, Department of Radiation Physics and Chemistry, Hikariga-oka 1, Fukushima, 960-1295, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ischikawa
authors.affiliation: Fukushima Medical University, Department of Radiation Physics and Chemistry, Hikariga-oka 1, Fukushima, 960-1295, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Omori
authors.affiliation: Bhabha Atomic Research Centre, Radiological Physics and Advisory Division, Mumbai, India.
authors.forename: R
authors.initials: R
authors.lastname: Mishra
authors.affiliation: Bhabha Atomic Research Centre, Radiological Physics and Advisory Division, Mumbai, India.
authors.forename: B K
authors.initials: BK
authors.lastname: Sapra
authors.affiliation: Institute Jozef Stefan, Radon Centre, Jamova 39, 1000 Ljubljana, Slovenia.
authors.forename: J
authors.initials: J
authors.lastname: Vaupotič
authors.affiliation: Institute of Nuclear Sciences "Vinča", University of Belgrade, 11000 Belgrade, Serbia. Electronic address: ujic@vinca.rs.
authors.forename: P
authors.initials: P
authors.lastname: Ujić
authors.affiliation: German Federal Office for Radiation Protection, Köpenicker Allee 120-130, 10318 Berlin, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Bossew
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D017522:Bosnia and Herzegovina; D011834:Radiation Monitoring / Q000295:instrumentation; D011886:Radon / Q000032:analysis*; D017687:Radon Daughters / Q000032:analysis; D012574:Schools
chemical_list: D000396:Air Pollutants, Radioactive; D017687:Radon Daughters; D011886:Radon
keywords: Equilibrium factor; Indoor air; Nuclear track detectors; Primary schools; Radon; Radon progenies; Thoron; Thoron progenies