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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:57 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Some Considerations on the Environmental Radioactivity in the area of the National Radioactive Waste Repository, Baita-Bihor
Authors:
L. Dinescu, I. Paunica, M. Haralambie, D. Breban
Affiliation:
National Institut of Phisycs and Nuclear Engineering "Horia Hulubei", Bucharest, PO Box MG-6, RO-76900, Romania
E-mail
Keywords:
Abstract:
National Radioactive Waste Repository for low and intermediate levels of activity is located nearby Uranium quarry Baita, in the South-Eastern part of the Bihor Mountains. Consequently, a complex environmental monitoring is necessary.
The scope of our study was to identify the artificial radionuclides (provided by the radioactive waste), and the natural ones in the invesigated area and to establish the contamination level inside the platform of the drum unloading as well as a possible migration in the immediate vicinity. The water, soil and plant samples were collected from the selected points seasonally (excepting winter) in 2001 and 2002. The samples were prepared according to our specific procedures and measured by gamma ray spectrometry. The radionuclides 60Co and 137Cs, originated from radioactive waste, were found in the platform area, their concentration ranging between 50-2400 Bq/kg. 60Co was not put in evidence outside the platform, but the activity concentration values of 137Cs were due to Chernobyl fallout or slightly increased . The radionuclides 238U, 234mPa, 226Ra and its progeny were evidenced on the platform area and in its immediate vicinity, in almost all analyzed samples, several values being ³ 10 kBq/kg. Also, 137Cs and 226Ra were evidenced in vegetation samples. The soil plant transfer factors were calculated (when it was possible) for 137Cs and 226Ra. 60Co was not evidenced in vegetation. For future projects we intend to measure the vertical concentration distribution for 137Cs and 226Ra.
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