METHOD OF CLEANING WATER OF COOLING PONDS OF ATOMIC STATION USED FUEL Russian patent published in 1997 - IPC

FIELD: ion-exchange technology of cleaning water; recirculating cleaning of saline highly-active radioactive wastes. SUBSTANCE: ion-exchange cleaning of water from radioactive admixtures is performed in recirculating mode through filter loaded with mixture of cationic exchanger in OH^- form and anionite. Before loading the filter, 10 to 20% of mixture of ion exchangers are treated in succession with solutions of potassium ferrocyanide and nickel sulfate at excessive total content of each reagent relative to exchange reservoir of ion-exchanger mixture. EFFECT: higher degree of cleaning. 3 tbl