TY  - JOUR
AU  - Đorđević, Jelena
AU  - Lazarević, Nataša
AU  - Zdjelarević, Nevena
AU  - Arbutina, Dalibor
AU  - Forkapić, Sofija
AU  - Janković, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12101
AB  - The main purpose of this paper was to determine tritium concentration in surface water samples, using liquid scintillation counting. Surface water samples were collected from the Mlaka creek on three different locations near PC „Nuclear Facilities of Serbia“. The importance of tritium monitoring around nuclear reactors and nuclear waste storages is due to prevention of possible internal exposure through ingestion of drinking waters with elevated levels of tritium from existing water supply in their nearby. Tritium concentrations that have been measured during the period from 2017 to 2022 ranged from less than 2 Bq/L to 103 Bq/L.
AB  - Glavni cilj ovog rada bio je da se utvrdi koncentracija tricijuma u uzorcima površinske vode. Korišćena metoda bila je tečna scintilaciona spektrometrija. Uzorci površinske vode uzeti su iz potoka Mlaka na tri različite lokacije u blizini JP „Nuklearni objekti Srbije“. Značaj monitoringa tricijuma oko nuklearnih reaktora i skladišta nuklearnog otpada je sprečavanje unutrašnjeg izlaganja unošenjenjem vode za piće sa povišenim nivoom tricijuma iz postojećih izvora vodosnabdevanja u njihovoj blizini. Koncentracije tricijuma koje su izmerene u periodu od 2017. do 2022. godine kretale su se od manje od 2 Bq/L do 103 Bq/L.
T2  - Scientific Technical Review
T1  - Determination of Tritium Concentration in Mlaka Creek
T1  - Određivanje koncentracije tricijuma u potoku Mlaka
VL  - 73
IS  - 1
SP  - 38
EP  - 41
DO  - 10.1016/j.tet.2020.131456
DO  - 10.5937/str2301038D
ER  - 

@article{
author = "Đorđević, Jelena and Lazarević, Nataša and Zdjelarević, Nevena and Arbutina, Dalibor and Forkapić, Sofija and Janković, Marija",
year = "2023",
abstract = "The main purpose of this paper was to determine tritium concentration in surface water samples, using liquid scintillation counting. Surface water samples were collected from the Mlaka creek on three different locations near PC „Nuclear Facilities of Serbia“. The importance of tritium monitoring around nuclear reactors and nuclear waste storages is due to prevention of possible internal exposure through ingestion of drinking waters with elevated levels of tritium from existing water supply in their nearby. Tritium concentrations that have been measured during the period from 2017 to 2022 ranged from less than 2 Bq/L to 103 Bq/L., Glavni cilj ovog rada bio je da se utvrdi koncentracija tricijuma u uzorcima površinske vode. Korišćena metoda bila je tečna scintilaciona spektrometrija. Uzorci površinske vode uzeti su iz potoka Mlaka na tri različite lokacije u blizini JP „Nuklearni objekti Srbije“. Značaj monitoringa tricijuma oko nuklearnih reaktora i skladišta nuklearnog otpada je sprečavanje unutrašnjeg izlaganja unošenjenjem vode za piće sa povišenim nivoom tricijuma iz postojećih izvora vodosnabdevanja u njihovoj blizini. Koncentracije tricijuma koje su izmerene u periodu od 2017. do 2022. godine kretale su se od manje od 2 Bq/L do 103 Bq/L.",
journal = "Scientific Technical Review",
title = "Determination of Tritium Concentration in Mlaka Creek, Određivanje koncentracije tricijuma u potoku Mlaka",
volume = "73",
number = "1",
pages = "38-41",
doi = "10.1016/j.tet.2020.131456, 10.5937/str2301038D"
}

Đorđević, J., Lazarević, N., Zdjelarević, N., Arbutina, D., Forkapić, S.,& Janković, M.. (2023). Determination of Tritium Concentration in Mlaka Creek. in Scientific Technical Review, 73(1), 38-41.
https://doi.org/10.1016/j.tet.2020.131456

Đorđević J, Lazarević N, Zdjelarević N, Arbutina D, Forkapić S, Janković M. Determination of Tritium Concentration in Mlaka Creek. in Scientific Technical Review. 2023;73(1):38-41.
doi:10.1016/j.tet.2020.131456 .

Đorđević, Jelena, Lazarević, Nataša, Zdjelarević, Nevena, Arbutina, Dalibor, Forkapić, Sofija, Janković, Marija, "Determination of Tritium Concentration in Mlaka Creek" in Scientific Technical Review, 73, no. 1 (2023):38-41,
https://doi.org/10.1016/j.tet.2020.131456 . .

TY  - CONF
AU  - Kuzmanović, Predrag
AU  - Forkapić, Sofija
AU  - Čeliković, Igor T.
AU  - Mrđa, Dušan
AU  - Bikit, Kristina
AU  - Hansman, Jan
AU  - Knežević Radić, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11933
AB  - This paper presents the results of gamma spectrometry measurements of natural radionuclides ( 226Ra, 232Th, and 40K) in some floor and wall ceramic tiles produced in Serbia and used in homes and workplaces. The level of radioactivity of some ceramic tiles produced in Serbia by two major manufacturers–Zorka Keramika and Toza Markovic was examined. The measured mean value of the activity concentration of 226Ra, 232Th, and 40K exceeds the average values in the world for building materials with values of 67.2±6.9 Bq kg-1 for 226Ra, 57.4±4.7 Bq kg-1 for 232Th and 808±48 Bq kg-1 for 40K. Based on these calculated values, the representative level index gamma index, associated with gamma radiation, whose average value is 0.78±0.06, and annual effective dose, whose average value is 0.117±0.009 mSv y-1 for home was obtained. Estimated values fulfill all the recommendations of the European Union for building materials, thus analyzed materials are considered not to be a health hazard for the public.
C3  - Proceedings of Science
T1  - Radioactivity Measurements of Ceramic Tiles Produced in Serbia
VL  - 427
SP  - 193246
DO  - 10.22323/1.427.0281
ER  - 

@conference{
author = "Kuzmanović, Predrag and Forkapić, Sofija and Čeliković, Igor T. and Mrđa, Dušan and Bikit, Kristina and Hansman, Jan and Knežević Radić, Jovana",
year = "2023",
abstract = "This paper presents the results of gamma spectrometry measurements of natural radionuclides ( 226Ra, 232Th, and 40K) in some floor and wall ceramic tiles produced in Serbia and used in homes and workplaces. The level of radioactivity of some ceramic tiles produced in Serbia by two major manufacturers–Zorka Keramika and Toza Markovic was examined. The measured mean value of the activity concentration of 226Ra, 232Th, and 40K exceeds the average values in the world for building materials with values of 67.2±6.9 Bq kg-1 for 226Ra, 57.4±4.7 Bq kg-1 for 232Th and 808±48 Bq kg-1 for 40K. Based on these calculated values, the representative level index gamma index, associated with gamma radiation, whose average value is 0.78±0.06, and annual effective dose, whose average value is 0.117±0.009 mSv y-1 for home was obtained. Estimated values fulfill all the recommendations of the European Union for building materials, thus analyzed materials are considered not to be a health hazard for the public.",
journal = "Proceedings of Science",
title = "Radioactivity Measurements of Ceramic Tiles Produced in Serbia",
volume = "427",
pages = "193246",
doi = "10.22323/1.427.0281"
}

Kuzmanović, P., Forkapić, S., Čeliković, I. T., Mrđa, D., Bikit, K., Hansman, J.,& Knežević Radić, J.. (2023). Radioactivity Measurements of Ceramic Tiles Produced in Serbia. in Proceedings of Science, 427, 193246.
https://doi.org/10.22323/1.427.0281

Kuzmanović P, Forkapić S, Čeliković IT, Mrđa D, Bikit K, Hansman J, Knežević Radić J. Radioactivity Measurements of Ceramic Tiles Produced in Serbia. in Proceedings of Science. 2023;427:193246.
doi:10.22323/1.427.0281 .

Kuzmanović, Predrag, Forkapić, Sofija, Čeliković, Igor T., Mrđa, Dušan, Bikit, Kristina, Hansman, Jan, Knežević Radić, Jovana, "Radioactivity Measurements of Ceramic Tiles Produced in Serbia" in Proceedings of Science, 427 (2023):193246,
https://doi.org/10.22323/1.427.0281 . .

TY  - CONF
AU  - Čeliković, Igor T.
AU  - Pantelić, Gordana K.
AU  - Živanović, Miloš
AU  - Krneta-Nikolić, Jelena D.
AU  - Zekić, Ranko
AU  - Svrkota, Nikola
AU  - Forkapić, Sofija
AU  - Predojević, Branko
AU  - Pavičar, Bojan
AU  - Arsić, Vesna
AU  - Vukanac, Ivana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11121
AB  - In accordance with ISO/IC 17025:2017 testing laboratory shall have a procedure for monitoring the validity of results that includes regular participation in interlaboratory comparisons. Interlaboratory comparison RADON2021 was organized in the frame of the bilateral project between Serbia and Montenegro: “Measurement of the radon equilibrium factor in typical residential buildings in Serbia and Montenegro and harmonization of radon measurement techniques” in order to assess congruence of different measurement techniques, and then harmonize methods in case of inconsistencies. Harmonization is of particular importance to neighboring countries, in order to avoid inconsistencies in the classification of radon risk zones along border areas. Thus, six regional laboratories took part in the intercomparison – three from Belgrade and one from Novi Sad, Serbia; one from Podgorica, Montenegro; one from Banja Luka, Bosnia and Herzegovina. All laboratories participated in the indoor radon measurements, while 4 laboratories measured radon in the soil also. The measurement methods and detectors used by the laboratories were: • for air - EPA 402-R-92-004 – Indoor Radon and Radon Decay Product Measurement Devices Protocols, ch. 3.1. with RAD 7, RTM1688-2 and RadonEye; EPA 520/5-87-005 – 1987 EERF Standard Operating Procedures for Rn-222 Measurement Using Charcoal Canisters, ch. 3.4 using adsorption on charcoal canisters; ISO 11665- 4: Measurement of radioactivity in the environment – Air Radon 222: Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis with Electretes, and • for soil gas - ISO 11665-11:2016 Measurement of radioactivity in the environment — Air: radon-222 — Part 11: Test method for soil gas with sampling at depth by using active devices RTM1688-2 and RAD 7. The measurements were performed in real conditions where the radon concentration varied following a typical daily variation. Indoor radon concentrations were measured at four locations, while radon measurements in soil were performed at one location, all at the Vinča Institute site in the period from October 1 to October 8, 2021. The exposure period was consistent with a typical soil and indoor radon measurement protocols. The radon concentration in the soil was measured at depths of 20 cm and 80 cm. The robust mean and robust standard deviation were calculated as the mean of all measured radon concentrations (excluding outliers) and their standard deviation. Reference values of indoor radon covered the wide range of concentrations: (65 ± 9) Bq m-3 , (519 ± 80) Bq m-3 , (900 ± 160) Bq m-3 , (1980 ± 160) Bq m-3 , while in the soil reference values were (13350 ± 780) Bq m-3 and (26100 ± 2400) Bq m-3 at 20 cm and 80 cm depth, respectively. In order to assess whether there is a statistically significant difference between individual measurement results and the reference value, the Z - test was used as a criterion for success. If, for the calculated z value, |z| < 2 the result is satisfactory, if 2 < |z| < 3 the result is questionable, while for |z| > 3 result is not acceptable. All results of indoor radon measurements were satisfactory, except in the case of one measurement (for the lowest reference value) with electret, that was at the detection limit. Three laboratories had satisfactory results of radon concentration measurements in the soil, while the results of one laboratory were systematically lower, with z <-3, which indicated the need for additional analysis of the causes of systematic error and the possible need to change measurement protocols and/or re-calibration of used device.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Determination of indoor radon concentration and radon concentration in soil: Regional Interlaboratory Comparison – RADON2021
SP  - 186
DO  - 10.21175/rad.spr.abstr.book.2022.37.5
ER  - 

@conference{
author = "Čeliković, Igor T. and Pantelić, Gordana K. and Živanović, Miloš and Krneta-Nikolić, Jelena D. and Zekić, Ranko and Svrkota, Nikola and Forkapić, Sofija and Predojević, Branko and Pavičar, Bojan and Arsić, Vesna and Vukanac, Ivana",
year = "2022",
abstract = "In accordance with ISO/IC 17025:2017 testing laboratory shall have a procedure for monitoring the validity of results that includes regular participation in interlaboratory comparisons. Interlaboratory comparison RADON2021 was organized in the frame of the bilateral project between Serbia and Montenegro: “Measurement of the radon equilibrium factor in typical residential buildings in Serbia and Montenegro and harmonization of radon measurement techniques” in order to assess congruence of different measurement techniques, and then harmonize methods in case of inconsistencies. Harmonization is of particular importance to neighboring countries, in order to avoid inconsistencies in the classification of radon risk zones along border areas. Thus, six regional laboratories took part in the intercomparison – three from Belgrade and one from Novi Sad, Serbia; one from Podgorica, Montenegro; one from Banja Luka, Bosnia and Herzegovina. All laboratories participated in the indoor radon measurements, while 4 laboratories measured radon in the soil also. The measurement methods and detectors used by the laboratories were: • for air - EPA 402-R-92-004 – Indoor Radon and Radon Decay Product Measurement Devices Protocols, ch. 3.1. with RAD 7, RTM1688-2 and RadonEye; EPA 520/5-87-005 – 1987 EERF Standard Operating Procedures for Rn-222 Measurement Using Charcoal Canisters, ch. 3.4 using adsorption on charcoal canisters; ISO 11665- 4: Measurement of radioactivity in the environment – Air Radon 222: Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis with Electretes, and • for soil gas - ISO 11665-11:2016 Measurement of radioactivity in the environment — Air: radon-222 — Part 11: Test method for soil gas with sampling at depth by using active devices RTM1688-2 and RAD 7. The measurements were performed in real conditions where the radon concentration varied following a typical daily variation. Indoor radon concentrations were measured at four locations, while radon measurements in soil were performed at one location, all at the Vinča Institute site in the period from October 1 to October 8, 2021. The exposure period was consistent with a typical soil and indoor radon measurement protocols. The radon concentration in the soil was measured at depths of 20 cm and 80 cm. The robust mean and robust standard deviation were calculated as the mean of all measured radon concentrations (excluding outliers) and their standard deviation. Reference values of indoor radon covered the wide range of concentrations: (65 ± 9) Bq m-3 , (519 ± 80) Bq m-3 , (900 ± 160) Bq m-3 , (1980 ± 160) Bq m-3 , while in the soil reference values were (13350 ± 780) Bq m-3 and (26100 ± 2400) Bq m-3 at 20 cm and 80 cm depth, respectively. In order to assess whether there is a statistically significant difference between individual measurement results and the reference value, the Z - test was used as a criterion for success. If, for the calculated z value, |z| < 2 the result is satisfactory, if 2 < |z| < 3 the result is questionable, while for |z| > 3 result is not acceptable. All results of indoor radon measurements were satisfactory, except in the case of one measurement (for the lowest reference value) with electret, that was at the detection limit. Three laboratories had satisfactory results of radon concentration measurements in the soil, while the results of one laboratory were systematically lower, with z <-3, which indicated the need for additional analysis of the causes of systematic error and the possible need to change measurement protocols and/or re-calibration of used device.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Determination of indoor radon concentration and radon concentration in soil: Regional Interlaboratory Comparison – RADON2021",
pages = "186",
doi = "10.21175/rad.spr.abstr.book.2022.37.5"
}

Čeliković, I. T., Pantelić, G. K., Živanović, M., Krneta-Nikolić, J. D., Zekić, R., Svrkota, N., Forkapić, S., Predojević, B., Pavičar, B., Arsić, V.,& Vukanac, I.. (2022). Determination of indoor radon concentration and radon concentration in soil: Regional Interlaboratory Comparison – RADON2021. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 186.
https://doi.org/10.21175/rad.spr.abstr.book.2022.37.5

Čeliković IT, Pantelić GK, Živanović M, Krneta-Nikolić JD, Zekić R, Svrkota N, Forkapić S, Predojević B, Pavičar B, Arsić V, Vukanac I. Determination of indoor radon concentration and radon concentration in soil: Regional Interlaboratory Comparison – RADON2021. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:186.
doi:10.21175/rad.spr.abstr.book.2022.37.5 .

Čeliković, Igor T., Pantelić, Gordana K., Živanović, Miloš, Krneta-Nikolić, Jelena D., Zekić, Ranko, Svrkota, Nikola, Forkapić, Sofija, Predojević, Branko, Pavičar, Bojan, Arsić, Vesna, Vukanac, Ivana, "Determination of indoor radon concentration and radon concentration in soil: Regional Interlaboratory Comparison – RADON2021" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):186,
https://doi.org/10.21175/rad.spr.abstr.book.2022.37.5 . .

TY  - JOUR
AU  - Kuzmanović, Predrag
AU  - Miljević, Bojan
AU  - Todorović, Nataša
AU  - Forkapić, Sofija
AU  - Čeliković, Igor T.
AU  - Filipović Petrović, Leposava
AU  - Knežević Radić, Jovana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10636
AB  - In this work, the radon emanation coefficients for selected building materials that are most often used in Serbia for covering floor surfaces (concrete, concrete screed, granite, glazed ceramic tiles, marble, roofing tile, and terrazzo tile) were determined, and the influence of the material structure on their values. The concentration of 226Ra activity in the samples was determined using the gamma spectrometry method. Radon emanation was measured with the RAD7 device. The porosity of the samples was tested using mercury intrusion porosimetry and water absorption methods, and the structural analysis was performed using x-ray diffraction analysis and x-ray fluorescence analysis. The measured values of 226Ra activity concentrations were in the range (4.93–298) Bq kg−1, and the estimated values of the radon emanation coefficients were in the range (0.55–6.05) %. The obtained results indicate that the chemical and mineralogical composition, method of production, and the 226Ra activity concentration have an influence on the emanation of radon from the material. No significant correlation was found between the radon emanation coefficient and the open porosity of the material, most likely due to the inhomogeneous presence of pores of different dimensions in the materials. It was established that the total value of the emanation coefficient depends on the emanation coefficient for pores ⩽100 μm in size.
T2  - Journal of Radiological Protection
T1  - The influence of building material structure on radon emanation
VL  - 42
IS  - 4
SP  - 041508
DO  - 10.1088/1361-6498/aca59d
ER  - 

@article{
author = "Kuzmanović, Predrag and Miljević, Bojan and Todorović, Nataša and Forkapić, Sofija and Čeliković, Igor T. and Filipović Petrović, Leposava and Knežević Radić, Jovana",
year = "2022",
abstract = "In this work, the radon emanation coefficients for selected building materials that are most often used in Serbia for covering floor surfaces (concrete, concrete screed, granite, glazed ceramic tiles, marble, roofing tile, and terrazzo tile) were determined, and the influence of the material structure on their values. The concentration of 226Ra activity in the samples was determined using the gamma spectrometry method. Radon emanation was measured with the RAD7 device. The porosity of the samples was tested using mercury intrusion porosimetry and water absorption methods, and the structural analysis was performed using x-ray diffraction analysis and x-ray fluorescence analysis. The measured values of 226Ra activity concentrations were in the range (4.93–298) Bq kg−1, and the estimated values of the radon emanation coefficients were in the range (0.55–6.05) %. The obtained results indicate that the chemical and mineralogical composition, method of production, and the 226Ra activity concentration have an influence on the emanation of radon from the material. No significant correlation was found between the radon emanation coefficient and the open porosity of the material, most likely due to the inhomogeneous presence of pores of different dimensions in the materials. It was established that the total value of the emanation coefficient depends on the emanation coefficient for pores ⩽100 μm in size.",
journal = "Journal of Radiological Protection",
title = "The influence of building material structure on radon emanation",
volume = "42",
number = "4",
pages = "041508",
doi = "10.1088/1361-6498/aca59d"
}

Kuzmanović, P., Miljević, B., Todorović, N., Forkapić, S., Čeliković, I. T., Filipović Petrović, L.,& Knežević Radić, J.. (2022). The influence of building material structure on radon emanation. in Journal of Radiological Protection, 42(4), 041508.
https://doi.org/10.1088/1361-6498/aca59d

Kuzmanović P, Miljević B, Todorović N, Forkapić S, Čeliković IT, Filipović Petrović L, Knežević Radić J. The influence of building material structure on radon emanation. in Journal of Radiological Protection. 2022;42(4):041508.
doi:10.1088/1361-6498/aca59d .

Kuzmanović, Predrag, Miljević, Bojan, Todorović, Nataša, Forkapić, Sofija, Čeliković, Igor T., Filipović Petrović, Leposava, Knežević Radić, Jovana, "The influence of building material structure on radon emanation" in Journal of Radiological Protection, 42, no. 4 (2022):041508,
https://doi.org/10.1088/1361-6498/aca59d . .

TY  - JOUR
AU  - Kuzmanović, Predrag
AU  - Miljević, Bojan
AU  - Todorović, Nataša
AU  - Forkapić, Sofija
AU  - Čeliković, Igor T.
AU  - Filipović Petrović, Leposava
AU  - Knežević Radić, Jovana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10760
AB  - In this work, the radon emanation coefficients for selected building materials that are most often used in Serbia for covering floor surfaces (concrete, concrete screed, granite, glazed ceramic tiles, marble, roofing tile, and terrazzo tile) were determined, and the influence of the material structure on their values. The concentration of 226Ra activity in the samples was determined using the gamma spectrometry method. Radon emanation was measured with the RAD7 device. The porosity of the samples was tested using mercury intrusion porosimetry and water absorption methods, and the structural analysis was performed using x-ray diffraction analysis and x-ray fluorescence analysis. The measured values of 226Ra activity concentrations were in the range (4.93–298) Bq kg−1, and the estimated values of the radon emanation coefficients were in the range (0.55–6.05) %. The obtained results indicate that the chemical and mineralogical composition, method of production, and the 226Ra activity concentration have an influence on the emanation of radon from the material. No significant correlation was found between the radon emanation coefficient and the open porosity of the material, most likely due to the inhomogeneous presence of pores of different dimensions in the materials. It was established that the total value of the emanation coefficient depends on the emanation coefficient for pores ⩽100 μm in size.
T2  - Journal of Radiological Protection
T1  - The influence of building material structure on radon emanation
VL  - 42
IS  - 4
SP  - 041508
DO  - 10.1088/1361-6498/aca59d
ER  - 

@article{
author = "Kuzmanović, Predrag and Miljević, Bojan and Todorović, Nataša and Forkapić, Sofija and Čeliković, Igor T. and Filipović Petrović, Leposava and Knežević Radić, Jovana",
year = "2022",
abstract = "In this work, the radon emanation coefficients for selected building materials that are most often used in Serbia for covering floor surfaces (concrete, concrete screed, granite, glazed ceramic tiles, marble, roofing tile, and terrazzo tile) were determined, and the influence of the material structure on their values. The concentration of 226Ra activity in the samples was determined using the gamma spectrometry method. Radon emanation was measured with the RAD7 device. The porosity of the samples was tested using mercury intrusion porosimetry and water absorption methods, and the structural analysis was performed using x-ray diffraction analysis and x-ray fluorescence analysis. The measured values of 226Ra activity concentrations were in the range (4.93–298) Bq kg−1, and the estimated values of the radon emanation coefficients were in the range (0.55–6.05) %. The obtained results indicate that the chemical and mineralogical composition, method of production, and the 226Ra activity concentration have an influence on the emanation of radon from the material. No significant correlation was found between the radon emanation coefficient and the open porosity of the material, most likely due to the inhomogeneous presence of pores of different dimensions in the materials. It was established that the total value of the emanation coefficient depends on the emanation coefficient for pores ⩽100 μm in size.",
journal = "Journal of Radiological Protection",
title = "The influence of building material structure on radon emanation",
volume = "42",
number = "4",
pages = "041508",
doi = "10.1088/1361-6498/aca59d"
}

Kuzmanović, P., Miljević, B., Todorović, N., Forkapić, S., Čeliković, I. T., Filipović Petrović, L.,& Knežević Radić, J.. (2022). The influence of building material structure on radon emanation. in Journal of Radiological Protection, 42(4), 041508.
https://doi.org/10.1088/1361-6498/aca59d

Kuzmanović P, Miljević B, Todorović N, Forkapić S, Čeliković IT, Filipović Petrović L, Knežević Radić J. The influence of building material structure on radon emanation. in Journal of Radiological Protection. 2022;42(4):041508.
doi:10.1088/1361-6498/aca59d .

Kuzmanović, Predrag, Miljević, Bojan, Todorović, Nataša, Forkapić, Sofija, Čeliković, Igor T., Filipović Petrović, Leposava, Knežević Radić, Jovana, "The influence of building material structure on radon emanation" in Journal of Radiological Protection, 42, no. 4 (2022):041508,
https://doi.org/10.1088/1361-6498/aca59d . .

TY  - CONF
AU  - Kuzmanović, Predrag
AU  - Čeliković, Igor T.
AU  - Forkapić, Sofija
AU  - Todorović, Nataša
AU  - Filipović Petrović, Leposava
AU  - Mrđa, Dušan
AU  - Knežević, Jovana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11128
AB  - Phosphogypsum is a waste that is generated in the production of fertilizers and is very similar to the natural gypsum, thus its use in the construction industry is possible. It usually contains an increased concentration of 226Ra in its composition. The paper presents the results of measuring the radon emanation coefficients for phosphogypsum, natural gypsum and a mixture of natural gypsum and phosphogypsum (50%), that could be potentially used for the production of gypsum boards that are widely applied in construction. Using the method of gamma spectrometry the concentration of 226Ra in the samples was determined, while the concentration of emanated radon from the samples was measured in the specially constructed chambers of different volumes (1.5 l, 2.5 l, 4.25 l, and 30 l), using active radon monitors RAD7 (Durridge Company) and RTM1688-2 (Sarad GmbH). Radon emanation measurements were performed for about 100 cycles of 1 h, after which the emanation curve was fit and the equilibrium concentration of radon activity after one month was theoretically estimated. The effect of chamber volumes on the obtained values of the radon emanation coefficient was investigated. On the basis of the obtained emanation coefficients, it is concluded that these values are strongly dependent on the volume of the measuring chamber and that they increase with expanding the chamber volume. Therefore, it is recommended to use larger volumes of measuring chambers when determining the emanation coefficient for phosphogypsum or natural gypsum. In this way, the real conditions in rooms that are potentially constructed of such materials are better represented, while at the same time the existing effect is neglected.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - Determination of radon emanation for phosphogypsum produced in Serbia
SP  - 199
DO  - 10.21175/rad.abstr.book.2021.28.21
ER  - 

@conference{
author = "Kuzmanović, Predrag and Čeliković, Igor T. and Forkapić, Sofija and Todorović, Nataša and Filipović Petrović, Leposava and Mrđa, Dušan and Knežević, Jovana",
year = "2021",
abstract = "Phosphogypsum is a waste that is generated in the production of fertilizers and is very similar to the natural gypsum, thus its use in the construction industry is possible. It usually contains an increased concentration of 226Ra in its composition. The paper presents the results of measuring the radon emanation coefficients for phosphogypsum, natural gypsum and a mixture of natural gypsum and phosphogypsum (50%), that could be potentially used for the production of gypsum boards that are widely applied in construction. Using the method of gamma spectrometry the concentration of 226Ra in the samples was determined, while the concentration of emanated radon from the samples was measured in the specially constructed chambers of different volumes (1.5 l, 2.5 l, 4.25 l, and 30 l), using active radon monitors RAD7 (Durridge Company) and RTM1688-2 (Sarad GmbH). Radon emanation measurements were performed for about 100 cycles of 1 h, after which the emanation curve was fit and the equilibrium concentration of radon activity after one month was theoretically estimated. The effect of chamber volumes on the obtained values of the radon emanation coefficient was investigated. On the basis of the obtained emanation coefficients, it is concluded that these values are strongly dependent on the volume of the measuring chamber and that they increase with expanding the chamber volume. Therefore, it is recommended to use larger volumes of measuring chambers when determining the emanation coefficient for phosphogypsum or natural gypsum. In this way, the real conditions in rooms that are potentially constructed of such materials are better represented, while at the same time the existing effect is neglected.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "Determination of radon emanation for phosphogypsum produced in Serbia",
pages = "199",
doi = "10.21175/rad.abstr.book.2021.28.21"
}

Kuzmanović, P., Čeliković, I. T., Forkapić, S., Todorović, N., Filipović Petrović, L., Mrđa, D.,& Knežević, J.. (2021). Determination of radon emanation for phosphogypsum produced in Serbia. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 199.
https://doi.org/10.21175/rad.abstr.book.2021.28.21

Kuzmanović P, Čeliković IT, Forkapić S, Todorović N, Filipović Petrović L, Mrđa D, Knežević J. Determination of radon emanation for phosphogypsum produced in Serbia. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:199.
doi:10.21175/rad.abstr.book.2021.28.21 .

Kuzmanović, Predrag, Čeliković, Igor T., Forkapić, Sofija, Todorović, Nataša, Filipović Petrović, Leposava, Mrđa, Dušan, Knežević, Jovana, "Determination of radon emanation for phosphogypsum produced in Serbia" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):199,
https://doi.org/10.21175/rad.abstr.book.2021.28.21 . .

TY  - CONF
AU  - Forkapić, Sofija
AU  - Lakatoš, Robert
AU  - Bikit-Šreder, Kristina
AU  - Čeliković, Igor T.
AU  - Repić, Predrag
AU  - Mrđa, Dušan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11189
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia
T1  - The comprehensive radon survey in single-family houses in Vojvodina region
SP  - 213
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11189
ER  - 

@conference{
author = "Forkapić, Sofija and Lakatoš, Robert and Bikit-Šreder, Kristina and Čeliković, Igor T. and Repić, Predrag and Mrđa, Dušan",
year = "2018",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia",
title = "The comprehensive radon survey in single-family houses in Vojvodina region",
pages = "213",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11189"
}

Forkapić, S., Lakatoš, R., Bikit-Šreder, K., Čeliković, I. T., Repić, P.,& Mrđa, D.. (2018). The comprehensive radon survey in single-family houses in Vojvodina region. in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia
RAD Centre, Niš, Serbia., 213.
https://hdl.handle.net/21.15107/rcub_vinar_11189

Forkapić S, Lakatoš R, Bikit-Šreder K, Čeliković IT, Repić P, Mrđa D. The comprehensive radon survey in single-family houses in Vojvodina region. in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia. 2018;:213.
https://hdl.handle.net/21.15107/rcub_vinar_11189 .

Forkapić, Sofija, Lakatoš, Robert, Bikit-Šreder, Kristina, Čeliković, Igor T., Repić, Predrag, Mrđa, Dušan, "The comprehensive radon survey in single-family houses in Vojvodina region" in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia (2018):213,
https://hdl.handle.net/21.15107/rcub_vinar_11189 .