Strontium and cesium radionuclides in waters of the lower Dunai river in 1985?1990

Gedeonov, L.I.; Gritchenko, Z.G.; Ivanova, L. M.; Orlova, T.E.; Tishkov, V. P.; Toporkov, V.P.; Prokopenko, V. K.

doi:10.1007/bf00750976

“…16 gives modelled values and empirical data for 137 Cs in River Danube, the main outlier site related to the Chernobyl fallout. The conditions in River Danube have been the object of several studies (see, e.g., Gedeonov et al, 1993). The modelled value for the year just after the fallout is much higher than the empirical value.…”

Section: Resultsmentioning

confidence: 94%

A new generic sub-model for radionuclide fixation in large catchments from continuous and single-pulse fallouts, as used in a river model

Håkanson¹

2004

Journal of Environmental Radioactivity

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BlackSea: Radionuclides

Егоров¹,

Гулин²,

Polikarpov³

et al. 2005

Encyclopedia of Inorganic Chemistry

2

0

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Anthropogenic radionuclide pollution of the Black Sea originated primarily from the atmospheric nuclear weapon tests carried out during the late 1950s and early 1960s before the signing of the Test Ban Treaty in 1963, and after the Chernobyl nuclear power plant (NPP) accident in April 1986. Chernobyl atmospheric fallout deposited 1.7–2.4 PBq of 137 Cs into the Black Sea surface, which temporarily increased the 137 Cs inventory of the 0–50 m surface layer by a factor of 6–10 in comparison with its pre‐Chernobyl value. The contribution of Chernobyl‐origin 90 Sr (0.1–0.3 PBq) from atmospheric fallout was lower in comparison with that of 137 Cs. A subsequent 90 Sr input from the Danube and the Dnieper Rivers (about 0.16 PBq) was an important contribution to the budget of this radionuclide in the Black Sea, while the riverine 137 Cs input (0.02–0.03 PBq) was insignificant. The decrease of the 137 Cs inventory in the surface layer after Chernobyl accident has been mainly controlled by vertical mixing, loss through the Bosporus Strait, and radioactive decay. The loss through the Bosporus accounted for 2–2.5% of the 137 Cs inventory. In the case of 90 Sr, these processes have been compensated by river inputs from the Dnieper and Danube up to 1994–1995 and partially after 2000. The vertical mixing of 137 Cs and 90 Sr was mainly effective within the 0–200 m layer. Sediment inventories of 137 Cs in the Danube and Dnieper delta regions exceeded by one order of magnitude the values in the slope zone and two orders of magnitude those in the deep basin. Because of the self‐cleaning processes, the current levels of anthropogenic radionuclides are relatively low in all the components of the Black Sea environment, and therefore do not pose any radiological problem. Doses to marine biota from 137 Cs and 90 Sr are several orders of magnitude lower than those from natural 210 Po.

show abstract

BlackSea: Radionuclides

Егоров

¹

,

Гулин

²

,

Polikarpov

³

et al. 2011

Encyclopedia of Inorganic and Bioinorganic Chemistry

View full text Add to dashboard Cite

Anthropogenic radionuclide pollution of the Black Sea originated primarily from the atmospheric nuclear weapon tests carried out during the late 1950s and early 1960s before the signing of the Test Ban Treaty in 1963, and after the Chernobyl nuclear power plant (NPP) accident in April 1986. Chernobyl atmospheric fallout deposited 1.7–2.4 PBq of 137 Cs into the Black Sea surface, which temporarily increased the 137 Cs inventory of the 0–50 m surface layer by a factor of 6–10 in comparison with its pre‐Chernobyl value. The contribution of Chernobyl‐origin 90 Sr (0.1–0.3 PBq) from atmospheric fallout was lower in comparison with that of 137 Cs. A subsequent 90 Sr input from the Danube and the Dnieper Rivers (about 0.16 PBq) was an important contribution to the budget of this radionuclide in the Black Sea, while the riverine 137 Cs input (0.02–0.03 PBq) was insignificant. The decrease of the 137 Cs inventory in the surface layer after Chernobyl accident has been mainly controlled by vertical mixing, loss through the Bosporus Strait, and radioactive decay. The loss through the Bosporus accounted for 2–2.5% of the 137 Cs inventory. In the case of 90 Sr, these processes have been compensated by river inputs from the Dnieper and Danube up to 1994–1995 and partially after 2000. The vertical mixing of 137 Cs and 90 Sr was mainly effective within the 0–200 m layer. Sediment inventories of 137 Cs in the Danube and Dnieper delta regions exceeded by one order of magnitude the values in the slope zone and two orders of magnitude those in the deep basin. Because of the self‐cleaning processes, the current levels of anthropogenic radionuclides are relatively low in all the components of the Black Sea environment, and therefore do not pose any radiological problem. Doses to marine biota from 137 Cs and 90 Sr are several orders of magnitude lower than those from natural 210 Po.

show abstract

Strontium and cesium radionuclides in waters of the lower Dunai river in 1985?1990

Cited by 6 publications

References 1 publication

A new generic sub-model for radionuclide fixation in large catchments from continuous and single-pulse fallouts, as used in a river model

A new generic sub-model for radionuclide fixation in large catchments from continuous and single-pulse fallouts, as used in a river model

BlackSea: Radionuclides

BlackSea: Radionuclides

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