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 concentrates from radionuclides with using ozonization, filtration and selective sorption, as well as solidification of sludges, present in a bottom part of tanks were conducted. The cementation of sludges in the range of sludge/cement ratio of 0.3-1.54 were tested. It was proposed the decantate, cleaned from radionuclides, to dump to the Caspian Sea. Deposit from a filtration stage is transferred to cementation, and a spent sorbent directly in an apparatus body goes to a solid waste repository for a long- term storage. For processing sludges, present in a bottom part of tanks, a cementation is used. A cement compound obtained is transferred to a solid waste repository. The conceptual project of a complex for conditioning and temporary storage of evaporator concentrates, allowing cardinally to reduce danger of radioactive waste storage at BN-350 (breeder nuclear) was developed.