Process for producing uranium dioxide

Patent · Tue May 19 00:00:00 EDT 1987

OSTI ID:6531240

Noe, R O

This patent describes a process for the production of uranium dioxide powder by calcining a uranium compound, whereby an off-gas stream is produced by an ammonium diuranate calciner which contains ammonium fluoride vapor and uranium-containing particulate matter. The improvement comprises: maintaining the off-gas stream after discharge from the calciner at an elevated temperature in excess of about 340/sup 0/C; passing the off-gas stream while at the elevated temperature into a separate vessel, also maintained at a temperature in excess of about 340/sup 0/C; passing the off-gas in the separate vessel through a filter within the separate vessel, so that the uranium-containing particulate matter is retained within the separate vessel while the ammonium fluoride vapor passes through the filter while at the elevated temperature; and contacting the ammonium fluoride vapor from the off-gas after it passes through the filter with water to form an aqueous solution of ammonium fluoride.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4666684
• OSTI ID: 6531240
• Country of Publication: United States
• Language: English

Related Subjects

050700* -- Nuclear Fuels-- Fuels Production & Properties
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ACTINIDE COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM FLUORIDES
AMMONIUM URANATES
AQUEOUS SOLUTIONS
CALCINATION
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMICAL REACTORS
DECOMPOSITION
DISPERSIONS
FILTERS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
MIXTURES
OFF-GAS SYSTEMS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POWDERS
PYROLYSIS
SOLUTIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES
URANATES
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
VAPORS