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Podgorica, Montenegro

Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar
Radiation Protection Dosimetry | Year: 2012

Soil samples from Montenegro were analysed by the HPGe detector with 40 % of relative efficiency, for radioactivity due to 226Ra, 232Th and 40K. The average activity concentrations have been found to be 39.9, 43.5 and 437.6 Bq kg. -1, respectively, i.e. in accordance with those in the other South European countries. In order to evaluate the health hazard, radium equivalent activity, absorbed dose rate, annual effective dose rate, external hazard index, annual gonadal dose equivalent and excess lifetime cancer risk (CR) have been calculated. The excess lifetime CR (×10. -3) had a range from 0.12 to 0.79, with an arithmetic mean of 0.27, which is in accordance with the global average. Mean gonadal dose equivalent was higher than the world average, and one location was found with the radium equivalent activity >370 Bq kg -1, i.e. with the external hazard index higher than unity, which means the radiation hazard is not negligible. © The Author 2011. Published by Oxford University Press. All rights reserved. Source


Antovic N.M.,University of Montenegro | Antovic I.,State University of Novi Pazar | Svrkota N.,Center for Ecotoxicological Research
Radiation Protection Dosimetry | Year: 2010

226Ra activity in the South Adriatic Sea-water, surface sediment, mud with detritus, seagrass (Posidonia oceanica) samples and the mullet (Mugilidae) species Liza aurata, as well as soil and sand from the Montenegrin Coast-was measured using the six-crystal gamma-coincidence spectrometer PRIPYAT-2M. The results are used for calculation of the absorbed (and annual effective) dose rates in air due to the 226Ra gamma radiation. The absorbed dose rates ranged from 5.94 to 97.16 nGy h-1 (soil) and from 0.65 to 7.65 nGy h-1 (sand). In seawater 226Ra activity is found to be from 0.08 to 0.15 Bq l-1, while in whole L. aurata individuals from 0.58 to 1.97 Bq kg-1. Annual intake of 226Ra by human consumers of this fish species has been estimated to provide an effective dose of 0.006 mSv y-1. © The Author 2010. Published by Oxford University Press. Source


Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

A coincidence method for measuring radium and thorium activity has been developed using the PRIPYAT-2M gamma-ray coincidence spectrometer, with six NaI(Tl) detectors and registration geometry close to 4π. It was tested by measuring soil samples from the Northern region of Montenegro, as well as vegetation samples from the same region. The results showed a good agreement with ones obtained by the HPGe spectrometer. © 2009 Akadémiai Kiadó, Budapest, Hungary. Source


Antovic N.M.,University of Montenegro | Antovic I.,State University of Novi Pazar | Svrkota N.,Center for Ecotoxicological Research
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

232Th activities in the South Adriatic Sea-water, surface sediment, mud with detritus, seagrass (Posidonia oceanica) samples, and the mullet (Mugilidae) species Mugil cephalus, as well as soil and sand from the Montenegrin Coast, were measured using the six-crystal spectrometer PRIPYAT-2M, which has relatively high detection efficiency and a good sensitivity, and allows a short acquisition time, and measuring samples of any shape, without preliminary preparation and calibration measurements for different sample geometries. An average 232Th activity concentration in surface soil layer is found to be 40.33 Bq kg-1, while in sand-4.7 Bq kg -1. The absorbed dose rate in air due to 232Th gamma radiation from surface soil layer ranged from 11.76 to 63.39 nGy h-1, with a mean of 24.06 nGy h-1. Corresponding average annual effective dose rate has been found to be 0.03 mSv y-1. The absorbed dose rates due to the thorium gamma radiation in air at 1 m above sand surface on the Montenegrin beaches have been found to be from 0.41 to 9.08 nGy h-1, while annual effective dose rates ranged from 0.0005 to 0.011 mSv y -1. 232Th activity concentration in seawater ranged from 0.06 to 0.22 Bq L-1, as in the mullet (Mugil cephalus) whole individuals from 0.63 to 1.67 Bq kg-1. Annual intake of 232Th by human consumers of this fish species has been estimated to provide an effective dose of about 0.003 mSv y-1. © 2010 Akadémiai Kiadó. Source


Antovic N.M.,University of Montenegro | Vukotic P.,Montenegrin Academy of science and Arts | Svrkota N.,Center for Ecotoxicological Research | Andrukhovich S.K.,B. I. Stepanov Institute of Physics
Journal of Radioanalytical and Nuclear Chemistry | Year: 2012

Plutonium-238 ( 238Pu) activity concentrations in soil samples from Montenegro (six samples from three localities) have been measured for the first time. The 238Pu/ 137Cs activity ratio was determined on the basis of alpha and gamma-spectrometric measurements, and found to be with an average of 0.0006 and standard deviation of 0.0003. By using the activity ratios determined in the present study, 238Pu activity concentrations were estimated for three localities in the central: one in the northern, and two in the eastern part of Montenegro. © 2012 Akadémiai Kiadó. Source

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