THE CHARACTERIZATION OF INSOLUBLE DISSOLVER RESIDUES AND THE DEVELOPMENT OF TREATMENT METHODS
Characterization studies have been carried out on the insoluble residue arising from laboratory scale dissolution of single pins of mixed oxide fuel irradiated in the Dounreay Fast Reactor (DFR). Similar characterization work has also been completed on six samples of insoluble residue recovered from the reprocessing of complete subassemblies of mixed oxide fuel irradiated in PFR. Treatment methods for the dissolver insolubles have consisted of preparing immobilized samples in sand - ordinary portland cement (OPC), sand/pulverized fly ash (PFA)/OPC, and blast furnace slag (BFS)/OPC, using both centre loading and homogeneous mix techniques. A programme of leach testing has been carried out according to the conditions laid down in the International Standard Organization Test (ISO 6961-1980). Four samples of DFR originated insoluble residues and six samples of PFR originated insoluble residues have been immobilized and leach tested. Variations have included experiments to evaluate the leach rate under temperature influence and to acid wash prior to immobilization.
Bibliographic Reference: EUR 10823 EN (1986) FS, 67 P., BFR 250, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989125044000 / Last updated on: 1987-07-01
Available languages: en