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Kara Sea radioactivity assessment.
I Osvath1, P P Povinec, M S Baxter
1Marine Environment Laboratory, International Atomic Energy Agency, Monaco. i.osvath@iaea.org
The Science of the Total Environment
|November 24, 1999
Summary
Radiological contamination in the Kara Sea is confined to dumping sites. Radionuclide levels in the open Kara Sea originate from global fallout and other sources, posing minimal risk to mainland populations.
Area of Science:
- Environmental Science
- Radiological Science
- Marine Science
Background:
- The Kara Sea is a recipient of potential radioactive contamination from various sources.
- Understanding radionuclide distribution and impact is crucial for environmental safety assessments.
Purpose of the Study:
- To assess radiological contamination levels and sources in the Kara Sea.
- To evaluate potential risks to human populations from radionuclide exposure.
Main Methods:
- Field expeditions for sample collection (water, sediment, soil).
- Radionuclide inventory analysis.
- Computer modeling for dose assessment.
Main Results:
- No significant radiological contamination found outside Novaya Zemlya dumping sites.
- Elevated radionuclides in sediment near dumped containers in Abrosimov and Stepovoy Bays.
- Open Kara Sea contamination primarily from global fallout, with minor contributions from Sellafield, Chernobyl, and local sources.
Conclusions:
- Kara Sea contamination is localized to dumping areas.
- Doses to mainland populations are negligible; localized risks exist for specific groups near dumping sites.