C - Chemistry – Metallurgy – 25 – F
Patent
C - Chemistry, Metallurgy
25
F
C25F 5/00 (2006.01) G21F 9/00 (2006.01) G21F 9/28 (2006.01)
Patent
CA 2104064
Abstract A method of treating scrap graphite having a metal contaminant adhered thereto so as to separate the metal from the graphite comprises placing the scrap graphite in an aqueous oxidising electrolyte and passing through the electrolyte an electric current. The electric current may be a directional electric current. The metal may be uranium and the scrap graphite may be that used in the casting of uranium fuel rods. The graphite body disintegrates in the electrolyte and the metal dissolves at an accelerated rate under the influence of the electric current. The metal can also break off from the graphite and may dissolve over a longer time period in the electrolyte. The graphite so treated may therefore be separated from the electrolyte eg by filtering and washing. Where the graphite has been contaminated with uranium the separation by this process is sufficiently successful to allow the graphite to be disposed of in a conventional manner rather than special means required for hazardous, radioactive materials.
Holderness Stewart G.
Lewin Robert G.
British Nuclear Fuels Plc
Gowling Lafleur Henderson Llp
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