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Titolo:
RADIOACTIVE CONTAMINATION FROM DUMPED NUCLEAR WASTE IN THE KARA SEA -RESULTS FROM THE JOINT RUSSIAN-NORWEGIAN EXPEDITIONS IN 1992-1994
Autore:
SALBU B; NIKITIN AI; STRAND P; CHRISTENSEN GC; CHUMICHEV VB; LIND B; FJELLDAL H; BERGAN TDS; RUDJORD AL; SICKEL M; VALETOVA NK; FOYN L;
Indirizzi:
AGR UNIV NORWAY,ANALYT CHEM LAB,POB 5026 N-1432 AS NORWAY SCI PROD ASSOC TYPHOON,INST EXPT METEOROL OBNINSK 249020 RUSSIA NORWEGIAN RADIAT PROTECT AUTHOR N-1345 OESTERAAS NORWAY INST ENERGY TECHNOL N-2007 KJELLER NORWAY INST MARINE RES N-5011 NORDNES NORWAY
Titolo Testata:
Science of the total environment
fascicolo: 1-3, volume: 202, anno: 1997,
pagine: 185 - 198
SICI:
0048-9697(1997)202:1-3<185:RCFDNW>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Keywords:
RADIOACTIVE CONTAMINATION; DUMPING SITES; KARA SEA; SEA WATER; SEDIMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
B. Salbu et al., "RADIOACTIVE CONTAMINATION FROM DUMPED NUCLEAR WASTE IN THE KARA SEA -RESULTS FROM THE JOINT RUSSIAN-NORWEGIAN EXPEDITIONS IN 1992-1994", Science of the total environment, 202(1-3), 1997, pp. 185-198

Abstract

Russian-Norwegian expeditions to the Kara Sea and to dumping sites inthe fjords of Novaya Zemlya have taken place annually since 1992. In the fjords, dumped objects were localised with sonar and ROV equipped with underwater camera. Enhanced levels of Cs-137, (CO)-C-60, Sr-90 and Pu-239,Pu-240 in sediments close to dumped containers in the Abrosimov and Stepovogo fjords demonstrated that leaching from dumped material has taken place. The contamination was inhomogeneously distributed and radioactive particles were identified in the upper 10 cm of the sediments. Cs-137 was strongly associated with sediments, while Sr-90 wasmore mobile. The contamination was less pronounced in the areas whereobjects presumed to be reactor compartments were located. The enhanced level of radionuclides observed in sediments close to the submarine in Stepovogo fjord in 1993 could, however, not be confirmed in 1994. Otherwise, traces of Co-60 in sediments were observed in the close vicinity of all localised objects. Thus, the general level of radionuclides in waters, sediments and biota in the fjords is, somewhat higher or similar to that of the open Kara Sea, i.e. significantly lower than inother adjacent marine systems (e.g. Irish Sea, Baltic Sea, North Sea). The main sources contributing to radioactive contamination were global fallout from atmospheric nuclear weapon tests, river transport fromOb and Yenisey, marine transport of discharges from Sellafield, UK and fallout from Chernobyl. Thus, the radiological impact to man and thearctic environment of the observed leakages from dumped radioactive waste today, is considered to be low. Assuming all radionuclides are released from the waste, preliminary assessments indicate a collective dose to the world population of less than 50 man Sv. (C) 1997 Elsevier Science B.V.

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Documento generato il 03/12/20 alle ore 15:54:25