Transference of radionuclides in the Yenisej river

Paper presents data on the radionuclide contamination of the Yenisej river (both water and deep sediments) as a result of the Yenisej river water supply to cool the Mining and Chemical Combine commercial reactors. One examined the river contamination both within the operation time of the direct flow cooling system reactors and upon their shutdown. One points out some peculiar features of the radionuclide migration in the Yenisej river water, in particular, their distribution between the solid and liquid phases. One determined the content of 137Cs, 65Zn, 60Co, 54Mn and 152Eu within the river bed from the waste effluent place up to the Dudinka river. For 600 km length section of the river bed one evaluated the constant of self-purification from 137Cs: μ=0.19 years-1 (the relevant period of half-purification was equal to 3.6 years)