Radioactivity in the Baltic Sea |
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Authors: | E Holm |
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Institution: |
a Department of Radiation Physics, Lund University, Sweden |
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Abstract: | The Baltic Sea is, like the Mediterranean, a marginal sea, which with the Black Sea, were marine environments contaminated from the Chernobyl accident.
Radiocaesium and plutonium isotopes were studied in water, sediment and macroalgae in the Baltic Sea since 1982. the inventory of 137Cs in the Baltic increased from 0.65 PBq to 5.85 PBq following the Chernobyl accident. the corresponding increase for 239 + 240Pu was less significant and yielded 1.5 TBq to a total value of 16.5 TBq.
For plutonium, 98% is trapped in the sediment and the net-exchange of this element through the Baltic straits is very small (1 GBq/year), while for radiocaesium, 45% is in the water phase and there is a net-loss of 60 000 GBq annually into the adjacent water (Kattegatt). |
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Keywords: | Baltic sea radiocaesium source term radionuclide balance |
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