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[Radionuclides in the Kara sea bottom sediments]
A P Kuznetsov1, R Dando, I P Shmelev
1Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia.
Izvestiia Akademii Nauk. Seriia Biologicheskaia
|September 29, 1998
Summary
Technogenic radionuclides in Kara Sea sediments were analyzed in 1994. Elevated 137Cs levels from 1984 were not confirmed, suggesting new sources like Ob-Yenisei waters and corroded waste containers, evidenced by 60Co detection.
Area of Science:
- Environmental Science
- Radiochemistry
- Marine Geology
Context:
- Analysis of Kara Sea bottom sediments using R/V "Pomor" data.
- Assessment of natural (214Pb, 214Bi, 228Ac, 208Tl) and technogenic (90Sr, 137Cs, 60Co) radionuclides.
- Comparison of 1994 data with previous findings from 1984.
Purpose:
- To determine the content and distribution of natural and technogenic radionuclides in Kara Sea sediments.
- To investigate changes in radionuclide concentrations since 1984.
- To identify potential sources of technogenic radionuclides in the marine environment.
Summary:
- No critical concentrations of technogenic radioisotopes were found in Kara Sea sediments in 1994.
- Previously identified elevated 137Cs hotspots from 1984 were not confirmed.
- Potential sources include Ob-Yenisei riverine input and corroded radioactive waste containers, with 60Co detection supporting the latter.
Impact:
- Provides updated data on radionuclide contamination in the Kara Sea.
- Highlights the dynamic nature of radionuclide distribution in marine sediments.
- Informs environmental monitoring and risk assessment strategies for radioactive waste disposal in marine environments.