The determination of UO/sub 2/ and UF/sub 4/ in fused fluoride salts
The determination of uranium oxide solubilities in fused fluoride salts is important in the electrolytic preparation of uranium metal. This project was initiated to develop a method for the determination of UO/sub 2/ separately from UF/sub 4/ in UF/sub 4/-CaF/sub 2/-LiF fused salts. Previous methods used for the determination of UO/sub 2/ in fused fluoride salts involved inert gas fusions where oxygen was liberated as CO/sub 2/, and hydrofluorination where oxygen was released as H/sub 2/O; but the special equipment used for these procedures was no longer available. These methods assumed that all of the oxygen liberated was due to UO/sub 2/ and does not consider impurities from reagents and other oxygen sources that amount to a bias of approximately 0.3 wt %. This titrimetric method eliminates the bias by selectively extracting the UF/sub 4/ with a Na/sub 2/EDTA-H/sub 3/BO/sub 3/ solution. The remaining uranium oxide residue is treated and titrated gravimetrically to a potentiometric endpoint with NBS standard K/sub 2/Cr/sub 2/O/sub 7/. An aliquot of the Na/sub 2/EDTA-H/sub 3/BO/sub 3/ extract is also titrated gravimetrically to a potentiometric endpoint, this uranium component is determined and calculated as UF/sub 4/. 4 refs., 2 figs., 2 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Oak Ridge Y-12 Plant, TN (USA)
- DOE Contract Number:
- AC05-84OR21400; AC05-84OS21400
- OSTI ID:
- 6437458
- Report Number(s):
- CONF-890370-1; ON: DE89007849
- Country of Publication:
- United States
- Language:
- English
Similar Records
THE ABSORPTIOMETRIC DETERMINATION OF URANIUM DIOXIDE IN URANIUM TETRAFLUORIDE
THE FUSED SALT-FLUORIDE VOLATILITY PROCESS FOR RECOVERING URANIUM
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
OXIDES
OXYGEN COMPOUNDS
REDUCTION
SCATTERING
SEPARATION PROCESSES
SOLUBILITY
URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM OXIDES
URANIUM OXIDES U3O8
URANIUM TETRAFLUORIDE
X-RAY DIFFRACTION