خيارات البحث
النتائج 1 - 7 من 7
Dispersal of the radionuclide caesium-137 (137Cs) from point sources in the Barents and Norwegian Seas and its potential contamination of the Arctic marine food chain: Coupling numerical ocean models with geographical fish distribution data
2013
Heldal, Hilde Elise | Vikebø, Frode | Johansen, Geir Odd
Dispersal of 137Cs from the nuclear submarine wrecks Komsomolets and K-159, which are resting on the seabed in the Norwegian and Barents Seas, respectively, is simulated using realistic rates and hypothetical scenarios. Furthermore, spatiotemporal 137Cs concentrations in Northeast Arctic cod and capelin are estimated based on survey data. The results indicate that neither continuous leakages nor pulse discharges will cause concentrations of 137Cs in cod muscle or whole body capelin exceeding the intervention level of 600 Bq/kg fw. Continuous leakages from Komsomolets and K-159 and pulse discharges from Komsomolets induced negligible activity concentrations in cod and capelin. A pulse discharge of 100% of the 137Cs-inventory of K-159 will, however, result in concentrations in muscle of cod of above 100 times the present levels in the eastern Barents Sea. Within three years after the release, 137Cs levels above 20 Bq/kg fw in cod are no longer occurring in the Barents Sea.
اظهر المزيد [+] اقل [-]Modelling dispersal of radioactive contaminants in Arctic waters as a result of potential recovery operations on the dumped submarine K-27
2017
Karcher, M. | Hosseini, A. | Schnur, R. | Kauker, F. | Brown, J.E. | Dowdall, M. | Strand, P.
Of the wide variety of dumped objects containing radioactive materials in the Arctic seas, the submarine K-27 constitutes a major risk due to the large amount of highly enriched uranium onboard and its location in shallow waters. As the matter of potential operations involving raising of the submarine have entered the public arena, a priori assessment of the contamination in the Arctic marine environment that could result after a possible accident during such operations is a matter of some interest. The dispersion of contaminants within the Arctic has been assessed using a large scale hydrodynamic model for a series of plausible accident scenarios and locations under different oceanographic regimes. Results indicate that, depending primarily on the nature of a release (i.e. instantaneous or continuous), large areas of the Arctic marine environment will exhibit contamination to varying degrees.
اظهر المزيد [+] اقل [-]Multitracer study on absorption of radionuclides in atmosphere-plant model system
1998
Shinonaga, T. (Institute of Physical and Chemical Research, Wako, Saitama (Japan). Nuclear Chemistry Lab.) | Ambe, S.
Influence of labelled food type on the accumulation and retention of (60)Co by a freshwater fish, Cyprinus carpio L.
1990
Baudin, J.P. (Institut de Protection et de Surete Nucleaire, Saint-Paul-Lez-Durance (France). Lab. de Radioecologie des Eaux Continentales) | Fritsch, A.F. | Georges, J.
Urban storm water transport and wash-off of caesium-137 after the Chernobyl accident
1990
Halldin, S. (Uppsala Univ. (Sweden). Section of Hydrology) | Rodhe, A. | Bjurman, B.
Investigations on interception and translocation of airborne (85)Sr, (131)I, (137)Cs in beans, spinach and radish plants
1998
Singhal, R.K. (Bhabha Atomic Research Center, Bombay (India). Health Physics Div.) | Narayanan, U. | Bhat, I.S.
Radioactive contamination of the aquatic environment
1979
Mahdavi, A.
