TECHNICAL PROPOSALS ON PROCESSING EVAPORATOR CONCENTRATES,ACCUMULATED AT THE BN-350 REACTOR IN KAZAKHSTAN

摘要

In the course of works the experiments on cleaning decantates of evaporator concentratesrnfrom radionuclides with using ozonization, filtration and selective sorption, as well as solidificationrnof sludges, present in a bottom part of tanks were conducted. The cementation of sludges in thernrange of sludge/cement ratio of 0.3-1.54 were tested. It was proposed the decantate, cleaned fromrnradionuclides, to dump to the Caspian Sea. Deposit from a filtration stage is transferred torncementation, and a spent sorbent directly in an apparatus body goes to a solid waste repository for arnlong- term storage. For processing sludges, present in a bottom part of tanks, a cementation is used.rnA cement compound obtained is transferred to a solid waste repository. The conceptual project of arncomplex for conditioning and temporary storage of evaporator concentrates, allowing cardinally tornreduce danger of radioactive waste storage at BN-350 (breeder nuclear) was developed.