Journal
RADIOCHEMISTRY
Volume 62, Issue 6, Pages 700-722Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1066362220060028
Keywords
fractionation of high-activity wastes; extraction; precipitation; chlorinated cobalt dicarbollide
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Results are presented of tests, mastering, industrial exploitation, and optimization of an integrated scheme for fractionation of liquid high-activity wastes (HAWs) produced in processing of spent nuclear fuel (SNF), which includes the extractive recovery of the Cs-Sr with the system based on chlorinated cobalt dicarbollide in a heavy fluorinated diluent and extraction from the resulting raffinates of a group of rtansplutonium and rare-earth elements by the oxalate precipitation method. This was done at Mayak Production Association in 1996-2003. A total of more than 1600 m(3) of HAWs that were stored during a long time in storage facilities and contain more than 54 MCi of beta- emitters. About 52 MCi of beta- and also about 0.5 MCi of alpha-nuclides were isolated into concentrates and transferred to vitrification. The scale of activities on integrated fractionation of acid HAWs has no analogs in the world.
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