Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Influence of operation of thermal and fast reactors of the Beloyarsk NPP on the radioecological situation in the cooling pond: Part II, Macrophytes and fish

  • Aleksei Panov (Russian Institute of Radiology and Agroecology) ;
  • Alexander Trapeznikov (Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences) ;
  • Vera Trapeznikova (Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences) ;
  • Alexander Korzhavin (Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences)
  • Received : 2022.03.22
  • Accepted : 2022.10.21
  • Published : 2023.02.25
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Abstract

The influence of waste technological waters of thermal and fast reactors of Beloyarsk NPP (Russia) on the accumulation of 60Co, 90Sr and 137Cs in macrophytes and ichthyofauna of the cooling pond has been studied. Critical radionuclides, routes of their entry into the ecosystem and periods of maximum discharge of radioisotopes into the cooling pond have been determined. It is shown that the technology of electricity generation at the Beloyarsk NPP, based on fast reactors, has a much smaller effect on the release of artificial radionuclides into the environment. Therefore, during the entire period of monitoring studies (1976-2019), the decrease in the specific activity of radionuclides of NPP origin in macrophytes was 13-25800 times, in ichthyofauna 1.5-44.5 times. The maximum discharge of artificial radionuclides into the Beloyarsk reservoir was noted during the period of restoration and decontamination work aimed at eliminating the emergencies at the AMB reactors of NPP. The factors influencing the accumulation of artificial radionuclides in the components of the freshwater ecosystem of the Beloyarsk cooling pond have been determined, including: the physicochemical nature of radioisotopes, their concentration in surface water, the temperature of the aquatic environment, the trophicity of the reservoir, the species of hydrobionts.

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References

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