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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:25 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
The environmental radioactivity along the Danube river
Authors:
Monica-Mariana BADOI (1,2, Romul MARGINEANU (2)
Affiliation:
1) University of Bucharest, Faculty of Physics,P.O.BOX MG-11, Magurele, Bucharest
2) Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Bucharest-Magurele, Romania
E-mail
monikbadoi@gmail.com
Keywords:
gamma-ray spectrometry, Cs137, K40, underground laboratory, soil, water, Danube River
Abstract:
The most important sources of artificial radionuclides from the Danube River in the last 70 years are the nuclear weapons and the Chernobyl accident. Cs-137 is one of the radiological most important long-lived radionuclides of anthropogenic origin, which has accumulated in the environment [1,2]. This aspect was considered to be the most important for long-term radiological impact due to higher emissions, relatively long half-life and relatively high bioavailability. The aim of our work was to determine specific activity of the radinuclides Cs137, K40 along the Danube river. Therefore, in 2015 we conducted one campaign of sampling soil and water from the Danube River between Giurgiu and Murighiol[3]. Measurement of radionuclides in the samples were performed in the underground laboratory of IFIN-HH from Slanic-Prahova at a depth of 208 m below the entrance. The high resolution gamma-ray spectrometry laboratory is equipped with two HPGe detectors, produced by CANBERRA. The first detector has a relative efficiency of 22%, and the second detector has a 120% relative efficiency. The shielding factors of the radiation shields of the two detectors is about 4000.The specific activity of 137 Cs in water samples from the Danube was generally below the limit of detection. In soil, along the Danube River floodplain there are places with high values like Hinova and adjacent areas, and Isaccea.
References:
1.Browne E., Firestone R. B 1986, “Table of Radioactive Isotopes”, Wiley-Interscience, Publisher, ISBN-13 978-0471849094
2.Chris Busby, Comparing Fukushima releases with Chernobyl An Update for the 1st Anniversary, Green Audit, Aberystwyth K Occasional Paper 2012/2, March 11th 2012
3.Paunescu,N., D. Galeriu, R. Margineanu, A. Iorgulescu, The Environmental Radioactivity in Romanian Danube River Area during 1986 - 1990, J. Radioanal. Nucl. Chem. Vol. 163 No.2 289-299, 1992
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