Journal Article

Radioactive Contamination of the Caspian Sea

S.M. Vakulovsky and V.B. Chumichev

in Radiation Protection Dosimetry

Volume 75, issue 1-4, pages 61-64
Published in print January 1998 | ISSN: 0144-8420
Published online January 1998 | e-ISSN: 1742-3406 | DOI: https://dx.doi.org/10.1093/oxfordjournals.rpd.a032247
Radioactive Contamination of the Caspian Sea

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Between 1967 and 1975, the highest levels of radioactive contamination were observed in the northern part of the Caspian Sea and amounted to 100 Bq.m-3 for 90Sr, 19 Bq.m-3 for 137Cs and 11 kBq.m-3 for tritium. In 1975, the average concentrations of these isotopes in the surface waters of the central and southern parts of the Caspian Sea were 17 Bq.m-3, 9.6 Bq.m-3 and 4 kBq.m-3 respectively. In the period 1967-1975, the 90Sr inventory in water of the northern part of the Caspian Sea decreased by 50%, and in the surface layer (0-50 m) of the central and southern parts of the Caspian Sea it decreased by 25%. In the Caspian Sea as a whole, the 90Sr inventory over the period of 8 years remained practically the same and in 1975 amounted to 990 TBq. In the northern part of the Caspian Sea, the 137Cs/90Sr ratio is 0.25. At the same time, the 137Cs/90Sr ratio practically does not change with depth in the central and southern parts of the Caspian Sea and is, on average, 0.55.

Journal Article.  0 words. 

Subjects: Nuclear Chemistry, Photochemistry, and Radiation

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