METHOD FOR RECOVERING LIQUID RADIOACTIVE WASTES Russian patent published in 2006 - IPC G21F9/06 G21F9/20 

FIELD: recovering and decontaminating liquid radioactive wastes.

SUBSTANCE: proposed method includes settling down of source radioactive waste flow to form above-the-sediment liquid and mud. Above-the-sediment liquid is clarified in mechanical filter and filtrate is formed in the process. Filtrate is separated by ultra-filtration to form concentrate which is mixed up with source flow of liquid radioactive wastes and permeate. The latter is separated into brine and dialyzate; the former is concentrated by way of electroosmosis producing radioactive concentrate flow and dilute flow mixed up with permeate flow; the latter is subjected to deep desalting to form decontaminated solution. In the process filtrate coming from mechanical filter is subjected to ion-selective sorption prior to ultrafiltration , then associating dopes are introduced therein. Ultrafiltration is made under forced turbulent conditions and deep desalting of dialyzate is conducted in two stages; first stage includes reverse osmosis and second one, electric deionization of decontaminated solution.

EFFECT: enhanced decontamination degree of solution and ability of recovering highly mineralized wastes.

1 cl, 1 dwg, 1 ex