Method for decontamination of nickel-fluoride-coated nickel containing actinide-metal fluorides
In one aspect, the invention comprises contacting nickel-fluoride-coated nickel with gaseous ammonia at a temperature effecting nickel-catalyzed dissociation thereof and effecting hydrogen-reduction of the nickel fluoride. The resulting nickel is heated to form a melt and a slag and to effect transfer of actinide metals from the melt into the slag. The melt and slag are then separated. In another aspect, nickel contianing nickel oxide and actinide metals is contacted with ammonia at a temperature effecting nickel-catalyzed dissociation to effect conversion of the nickel oxide to the metal. The resulting nickel is then melted and separated as described. In another aspect nickel-fluoride-coated nickel containing actinide-metal fluorides is contacted with both steam and ammonia. The resulting nickel then is melted and separated as described. The invention is characterized by higher nickel recovery, efficient use of ammonia, a substantial decrease in slag formation and fuming, and a valuable increase in the service life of the furnace liners used for melting.
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- ERA-09-012373; EDB-84-036613
- Patent Number(s):
- None
- Application Number:
- ON: DE84005940
- OSTI ID:
- 5413522
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for decontamination of nickel-fluoride-coated nickel containing actinide-metal fluorides
THE DETERMINATION OF NICKEL IN BERYLLIUM COMPOUNDS (FLUORIDE, HYDROXIDE AND AMMONIUM FLUORBERYLLATE)
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ACTINIDE COMPOUNDS
AMMONIA
CHEMICAL REACTIONS
CLEANING
DECONTAMINATION
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
MELTING
METALS
NICKEL
NICKEL COMPOUNDS
NICKEL FLUORIDES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHASE TRANSFORMATIONS
REDUCTION
REMOVAL
SCRAP
SCRAP METALS
SLAGS
SOLID WASTES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTES