Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-673 - C1-676|
|Published online||25 March 2010|
Migration of radioactive contaminants discharged into the Yenisei river by the Krasnoyarsk mining and chemical complex
Scientific Production Association "Typhoon", Lenin Str. 82,
Kaluga Region, Obninsk 249020, Russia
Cooling waters from three reactors have been discharged into the Yenisei since 1958. Radioactive monitoring of water and bottom sediments was based on systematic observation at stationary monitoring sites and field studies. Regular observations were carried out in the near zone of the discharge and at measuring sections 250, 370 and 890 km far from the discharge point. The major contributors to water radioactive contamination were 24Na, 32P, 46Sc, 54Mn, 51Cr and 65Zn. At a distance of 15 km from the point of discharge of cooling waters, the concentrations of short-lived radionuclides were 10-100 times and those of long-lived radionuclides 100-1000 times lower the levels set by standards of radioactive safety. The studies of interface distribution in the river water suspended material system show that only 24Na, 51Cr and 32P move in the liquid phase in the river water, whereas 137Cs is evenly distributed between the suspended material and the liquid phase, most radionuclides moving primarily with the suspended material. Chemical forms of isotopes occurrence in water were determined.
© EDP Sciences, 2002
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