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Papers by Peter Jovanovic

Romanian Journal of Physics

Radon concentration measurements were performed in all 25 primary schools in Banja Luka city, the... more Radon concentration measurements were performed in all 25 primary schools in Banja Luka city, the capital of Republic of 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 shorttime...

Radioprotection, 2011

Uranium mine Žirovski vrh in Slovenia was closed in the year 1993. In the past years a lot of wor... more Uranium mine Žirovski vrh in Slovenia was closed in the year 1993. In the past years a lot of work was done for restoration of the area around the mine. There are two tailing sites, Jazbec and Boršt, filled with material with high specific activity of 226 Ra. Tailings are covered by different layers of clay and soil in depth of 2 m for reducing radon exhalation rate. Gras, growing on the surface of tailing sites has been used as fodder for domestic animals. We were interesting about the amount of the specific activity of natural radionuclides 238 U, 226 Ra or 210 Pb, transferred from the covering soil on the tailing to the grass on the surface area. The transfer factors of naturally occurring radionuclides have not been studied to the same extent as their artificial counterparts, but some comprehensive investigations have been done by various institutions around the world. In case of 226 Ra calculated values are two times or four times bigger than measured. For 210 Pb measured values are up to hundred times bigger than calculated. The reason for that is radon in the air, decays to the 210 Pb, deposited on the grass and not 210 Pb coming from the soil.

Due to their exceptional significance for cultural and natural heritage, the Skocjan Caves were e... more Due to their exceptional significance for cultural and natural heritage, the Skocjan Caves were entered on UNESCO's list of natural and cultural world heritage sites in 1986. Park Skocjan Caves is located in South Eastern part of Slovenia. It was established with aim of conserving and protecting exceptional geomorphological, geological and hydrological outstanding features, rare and endangered plant and animal

Journal of Radiation Research, 2009

Radon/Thoron/Natural radioactivity/Niška Banja/Obrenovac. Based on results of fieldwork in the Ba... more Radon/Thoron/Natural radioactivity/Niška Banja/Obrenovac. Based on results of fieldwork in the Balkan Region of Serbia from 2005 to 2007, soil gas radon and thoron concentrations as well as gamma dose rates were measured. Campaigns were conducted in two different geological regions: Niška Banja, considered a high natural radiation area, and Obrenovac around the TentB Thermal Power Plant (TPP), a low natural radiation area. Radon and thoron gas measurements were made by using two types of Japanese passive radon/thoron detectors, which included GPS data and gamma dose rates. The concentrations of soil radon gas in Niška Banja ranged from 1.8 to 161.1 kBq m-3 , whereas the concentrations for soil thoron gas ranged from 0.9 to 23.5 kBq m-3. The gamma dose rates varied from 70 to 320 nGy h-1. In the TentB area, radon concentration was found to range from 0.8 to 24.9 kBq m-3 and thoron from 0.6 to 1.9 kBq m-3. The gamma dose rate ranged from 90 to 130 nGy h-1. In addition, the natural radioactivity of the soil was investigated at the low background area. The radium and thorium contents in collected soil samples ranged from 23 to 58 and 33 to 67 Bq kg-1 , respectively. As a result of correlation analyses between the measured values, the highest correlation coefficient (R > 0.95) was found for thorium in the soil and the thoron gas concentration.

Environment International, 1996

Abstract Concentrations of radon and radon daughters in several karst caves were measured and ann... more Abstract Concentrations of radon and radon daughters in several karst caves were measured and annual doses for medical staff and patients were estimated. The results show that radon concentrations in caves that are deep under the surface were nearly constant throughout the year. In the caves that were closer to the surface, the concentrations were up to 10 times lower in winter than they were during the summer. Annual doses were estimated by various models, the values ranging from 10 mSv to over 50 mSv for the employed and from 50 μSv to 200 μSv for the patients, depending on the lung model.

Science of The Total Environment, 2001

Romanian Journal of Physics

Radon concentration measurements were performed in all 25 primary schools in Banja Luka city, the... more Radon concentration measurements were performed in all 25 primary schools in Banja Luka city, the capital of Republic of 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 shorttime...

Radioprotection, 2011

Uranium mine Žirovski vrh in Slovenia was closed in the year 1993. In the past years a lot of wor... more Uranium mine Žirovski vrh in Slovenia was closed in the year 1993. In the past years a lot of work was done for restoration of the area around the mine. There are two tailing sites, Jazbec and Boršt, filled with material with high specific activity of 226 Ra. Tailings are covered by different layers of clay and soil in depth of 2 m for reducing radon exhalation rate. Gras, growing on the surface of tailing sites has been used as fodder for domestic animals. We were interesting about the amount of the specific activity of natural radionuclides 238 U, 226 Ra or 210 Pb, transferred from the covering soil on the tailing to the grass on the surface area. The transfer factors of naturally occurring radionuclides have not been studied to the same extent as their artificial counterparts, but some comprehensive investigations have been done by various institutions around the world. In case of 226 Ra calculated values are two times or four times bigger than measured. For 210 Pb measured values are up to hundred times bigger than calculated. The reason for that is radon in the air, decays to the 210 Pb, deposited on the grass and not 210 Pb coming from the soil.

Due to their exceptional significance for cultural and natural heritage, the Skocjan Caves were e... more Due to their exceptional significance for cultural and natural heritage, the Skocjan Caves were entered on UNESCO's list of natural and cultural world heritage sites in 1986. Park Skocjan Caves is located in South Eastern part of Slovenia. It was established with aim of conserving and protecting exceptional geomorphological, geological and hydrological outstanding features, rare and endangered plant and animal

Journal of Radiation Research, 2009

Radon/Thoron/Natural radioactivity/Niška Banja/Obrenovac. Based on results of fieldwork in the Ba... more Radon/Thoron/Natural radioactivity/Niška Banja/Obrenovac. Based on results of fieldwork in the Balkan Region of Serbia from 2005 to 2007, soil gas radon and thoron concentrations as well as gamma dose rates were measured. Campaigns were conducted in two different geological regions: Niška Banja, considered a high natural radiation area, and Obrenovac around the TentB Thermal Power Plant (TPP), a low natural radiation area. Radon and thoron gas measurements were made by using two types of Japanese passive radon/thoron detectors, which included GPS data and gamma dose rates. The concentrations of soil radon gas in Niška Banja ranged from 1.8 to 161.1 kBq m-3 , whereas the concentrations for soil thoron gas ranged from 0.9 to 23.5 kBq m-3. The gamma dose rates varied from 70 to 320 nGy h-1. In the TentB area, radon concentration was found to range from 0.8 to 24.9 kBq m-3 and thoron from 0.6 to 1.9 kBq m-3. The gamma dose rate ranged from 90 to 130 nGy h-1. In addition, the natural radioactivity of the soil was investigated at the low background area. The radium and thorium contents in collected soil samples ranged from 23 to 58 and 33 to 67 Bq kg-1 , respectively. As a result of correlation analyses between the measured values, the highest correlation coefficient (R > 0.95) was found for thorium in the soil and the thoron gas concentration.

Environment International, 1996

Abstract Concentrations of radon and radon daughters in several karst caves were measured and ann... more Abstract Concentrations of radon and radon daughters in several karst caves were measured and annual doses for medical staff and patients were estimated. The results show that radon concentrations in caves that are deep under the surface were nearly constant throughout the year. In the caves that were closer to the surface, the concentrations were up to 10 times lower in winter than they were during the summer. Annual doses were estimated by various models, the values ranging from 10 mSv to over 50 mSv for the employed and from 50 μSv to 200 μSv for the patients, depending on the lung model.

Science of The Total Environment, 2001