title: Radionuclide contamination of sediment deposits in the Ob and Yenisey estuaries and areas of the Kara Sea.
abstract: The Ob and Yenisey rivers are major contributors to total riverine discharge to the Arctic Ocean. Several large nuclear facilities discharge into these rivers, which could affect actual and potential discharges of radionuclides to the Arctic region. This article presents new radionuclide concentration and grain-size data resulting from analyses of several sediment samples collected during research cruises in the Ob and Yenisey estuaries and adjacent areas during 2000 and 2001. Results indicate that discharges from the main nuclear facilities do not constitute a major contribution to the level of radioactive contamination in the marine areas studied, though Co-60 was detected at low concentrations in some sediment horizons. However, the aggregate contamination from different sources is not radioecologically significant in sediments within the study area, maximum Cs-137 levels being approximately 80 Bq kg(-1) dry weight.
authors.affiliation: Norwegian Radiation Protection Authority, Grini Naeringspark 13, P.O. Box 55, N-1332 Østerås, Norway. william.standring@nrpa.no
authors.forename: W J F
authors.initials: WJ
authors.lastname: Standring
authors.forename: O
authors.initials: O
authors.lastname: Stepanets
authors.forename: J E
authors.initials: JE
authors.lastname: Brown
authors.forename: M
authors.initials: M
authors.lastname: Dowdall
authors.forename: A
authors.initials: A
authors.lastname: Borisov
authors.forename: A
authors.initials: A
authors.lastname: Nikitin
mesh_terms: D001110:Arctic Regions; D002588:Cesium Radioisotopes / Q000032:analysis*; D003037:Cobalt Radioisotopes / Q000032:analysis*; D005843:Geography; D019015:Geologic Sediments; D009792:Oceans and Seas; D011005:Plutonium; D011834:Radiation Monitoring / Q000379:methods*; D011850:Radioactive Waste; D011868:Radioisotopes / Q000032:analysis*; D012800:Siberia; D013326:Strontium Radioisotopes / Q000032:analysis; D014872:Water Movements; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014878:Water Pollution, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D011850:Radioactive Waste; D011868:Radioisotopes; D013326:Strontium Radioisotopes; D014875:Water Pollutants, Radioactive; D011005:Plutonium