Ljubica ZUPUNSKI¹, Vesna SPASIC JOKIC¹ & Vojin GORDANIC^2
1Faculty of Technical Sciences, University of Novi Sad, 21000 Novi Sad, Trg Dositeja Obradovica 6, Serbia, svesna@uns.ac.rs, ljubicaz@uns.ac.rs;
²Geoscience, Kosovska 18, 11000 Belgrade, Serbia, gordanicv@gmail.com

NATURAL RADIONUCLIDES CONTENT IN THE RIVER SEDIMENT AND RELATED HEALTH RISK ASSESSMENT FOR THE WEST MORAVA RIVER BASIN, SERBIA

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Purpose of this study was to measure activity concentration for radionuclides ²³²Th, ⁴⁰K, and total uranium (^ΣU) using HPGe detector in samples collected from the three levels of bank profiles (A-alluvial soil level, OB-overbank level, S-active stream level) in the West Morava River basin, Serbia. External dose equivalent was estimated as well as inhalation and ingestion lifetime cancer morbidity risks. External dose equivalent was obtained using Monte Carlo package FOTELP. Mean activity concentrations are (393 Bq/kg - A, 378 Bq/kg - OB, 346 Bq/kg – S) for ⁴⁰K, (29 Bq/kg - A, 24 Bq/kg - OB, 23 Bq/kg - S) for ^ΣU and (31 Bq/kg - A, 30 Bq/kg - OB, 22.5 Bq/kg - S) for ²³²Th. Mean value of calculated cancer morbidity risk from ²³²Th inhalation is 0.94×10^-6, range (0.35 – 1.4) ×10^-6 and for ingestion 1.7×10^-6, range (0.6 - 2.5) ×10^-6. Mean value of calculated cancer morbidity risk from ²³⁸U inhalation is 0.2×10^-6, range (0.07-0.3) ×10^-6 and from ingestion 0.43×10^-6, range (0.17-0.58) ×10^-6.