Reconstruction of Radiation Doses to Freshwater Organisms Contaminated after the Accident at the Mayak Chemical Plant

A mathematical model of radionuclide migration in freshwater bodies and dosimetric models for estimating the exposure of aquatic organisms (phytoplankton, zooplankton, zoobenthos, and fish) are presented. The results of reconstruction of radiation doses to aquatic organisms living in noncurrent Uruskul Lake located in the near zone of the Kyshtym accident are presented. The contributions of various radionuclides as well as the internal and external exposure to the formation of doses to aquatic organisms for 50 years after radionuclides entered the body of water are estimated.