И з в е с т и я в у з о в • Я д е р н а я э н е р г е т и к а • № 1 • 2 0 1 5 119

It is shown that the minimum volume of secondary radioactive waste accumulated during the processing of liquid radioactive media can only be achieved by creating conditions that ensure the formation of poorly soluble compounds that contain radionuclides as a natural component. The introduction of radionuclides into the formed 113solid phase occurs together with their chemical analogues, which are generally contained in the composition of liquid radioactive media being processed. Considering these provisions, as well as the influence of complex formation processes with activated corrosion products after the organization of non selective concentration processes, for example, by evaporation or reverse osmosis, of radioactively contaminated waters, it should be noted that the system of direct processing of NPP drain waters can be considered the most acceptable in comparison with the processing of radioactive concentrates. The development of a system for fractionation of NPP drain waters is also due to a reduction in the operating volume for disposing of distillation plant bottoms. This opens a «windows of opportunities» for developers of technologies for handling radioactively contaminated solutions. An analysis of the technical solutions of the drain water processing system of the Novoronezh NPP 2 is given.