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New method for conversion of uranium hexafluoride to uranium dioxide

Conference · · Trans. Am. Nucl. Soc.; (United States)
OSTI ID:5535304
; ;

Five different methods for conversion of UF/sub 6/ to ceramic-grade UO/sub 2/ powder have been developed to industrial scale. Two of them, the ammonium diuranate (ADU) and AUC processes, are based on precipitation of uranium compounds from aqueous solutions. The other three follow a dry route in which UF/sub 6/ is hydrolyzed and reduced by steam and hydrogen using fluidized bed techniques, rotating kilns, or flame chemistry methods. The ADU process has the advantage of flexible product powder characteristics, while disadvantages include a large quantity of waste, low powder fluidity, and a complicated process. On the other hand, the dry process using fluidized-bed techniques has the advantages of hydrofluoric acid recovery, a free-flowing powder, and process simplicity, but the disadvantages of poorer ceramic properties for the product. The new method developed at Mitsubishi Metal Corp. is a semidry process, which has well-balanced merits over the ADU process and the dry process using fluidized-bed techniques. This process is very attractive from powder characteristics, process simplicity, and waste reduction.

Research Organization:
Mitsubishi Metal Corp., Tokyo, Japan
OSTI ID:
5535304
Report Number(s):
CONF-870601-
Journal Information:
Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 54; ISSN TANSA
Country of Publication:
United States
Language:
English

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Related Subjects

050700* -- Nuclear Fuels-- Fuels Production & Properties
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDE COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPACTING
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FABRICATION
FLUIDIZED BEDS
FLUORIDES
FLUORINE COMPOUNDS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN
HYDROLYSIS
LYSIS
MATERIALS
MICROSTRUCTURE
NONMETALS
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
POWDERS
PRODUCTION
REACTOR MATERIALS
REDUCTION
SINTERING
SOLVOLYSIS
STEAM
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM FLUORIDES
URANIUM HEXAFLUORIDE
URANIUM OXIDES