NPP Liquid Radioactive Waste Treatment w ith Selective Extraction of Radionuclides - 11272

experiments to treat the major types of LRW from NPPs have been conducted. Ion-selective sorption for all kinds of radionuclides has been developed for purification of evaporator concentrates. The technology includes ozonization, filtration and selective sorption of Cs radionuclides. Ion-selective sorption technology has been tested in the laboratory and pilot plants and implemented on an industrial-scale at Kola NPP. Several methods, including dissolution with subsequent selective extraction of radionuclides, have been tested for the treatment of salt residue. Peroxide dissolution with subsequent ozonization and selective extraction of radionuclides has been proposed for treatment of ion-exchange resins. The technology of cotreatment for evaporator concentrates, salt residue and ion- exchange resins has been developed from the results of the work carried out.