Risk assessment resulting from radionuclides in soils of the Republic of Macedonia

Stojanovska, Zdenka and Boev, Blazo and Ristova, Mimoza and Boev, Ivan and Ajka, Sorsa and Zunic, Zora S. and Ivanova, Kremena (2019) Risk assessment resulting from radionuclides in soils of the Republic of Macedonia. Contributions, Section of Natural, Mathematical and Biotechnical Sciences, MASA - Dedicated to academician Gjorgji Filipovski on the occasion of his 100th birthday, 40 (2). pp. 161-168. ISSN 1857–9949

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Abstract

In the last decade, many studies have been made for measuring natural radioactivity in regions of the Republic of Macedonia. However, the information on terrestrial radiation exposure, and, consequently, risk assessment were not available. In this study, a risk assessment was done considering a specific activity concentration of 226Ra, 232Th, 40K and 137Cs in the topsoil. The results indicate that the external gamma doses due to natural radionuclides in soils are higher than those of 137Cs. The absorbed dose rate in air varies in intervals: from 4.3 to 57 nGy/h (due to 226Ra); from 3.9 to 88 nGy/h (due to 232Th); from 3.3 to 58 nGy/h (due to 40K); and from 0.01 to 5.3 nGy/h (due to 137Cs). In addition, the mean annual effective doses due to natural radionuclides and 137Cs in the soils of the Republic of Macedonia are estimated to be 78 μSv and 1.01 μSv, respectively. As well as, the values of external hazard index Hex indicate in general low gamma radiation risk for populations living in the Republic of Macedonia.

Item Type: Article
Uncontrolled Keywords: outdoor; gamma dose; external hazard index
Subjects: Natural sciences > Earth and related environmental sciences
Natural sciences > Other natural sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Biljana Kosturanova
Date Deposited: 10 May 2019 10:32
Last Modified: 10 May 2019 10:32
URI: http://eprints.ugd.edu.mk/id/eprint/22018

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