Rate-controlling factors in the carbothermic preparation of UO/sub 2/-UC/sub 2/-C microspheres
Journal Article
·
· J. Am. Ceram. Soc.; (United States)
Rate-controlling factors in the conversion of UO/sub 2/ + C microspheres to UC/sub 2/ + C were investigated using a fluidized-bed furnace (13 cm in diam). Examination by x-ray diffraction, ion microprobe, and microstructural observation revealed that the conversion of UO/sub 2/ to UC/sub 2/ began at the surface of the microsphere and progressed toward the central unreacted core. Kinetic models for solid state reactions in spheres were evaluated by using quantitative mass spectrometric data on the rate of evolution of CO during conversion. This analysis revealed that the rate of conversion was controlled by reaction at the outer surface of the microsphere. Also, decreased partial pressures of CO accelerated the rate of reaction.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5523119
- Journal Information:
- J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 61:11-12; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Technical Report
·
Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:6394979
Production of spherical UO/sub 2/-UC/sub 2/ for nuclear fuel applications using thermochemical principles
Journal Article
·
Thu Jul 01 00:00:00 EDT 1982
· J. Am. Ceram. Soc.; (United States)
·
OSTI ID:5880100
Quantification of process variables for carbothermic synthesis of UC1-xNx fuel microspheres
Journal Article
·
Fri Nov 04 20:00:00 EDT 2016
· Journal of Nuclear Materials
·
OSTI ID:1360046
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210300 -- Power Reactors
Nonbreeding
Graphite Moderated
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACTINIDE COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONIZATION
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
ENERGY SOURCES
FUELS
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
MATERIALS
MICROSPHERES
MICROSTRUCTURE
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
REACTOR MATERIALS
REACTORS
SYNTHESIS
URANIUM CARBIDES
URANIUM COMPOUNDS
210300 -- Power Reactors
Nonbreeding
Graphite Moderated
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACTINIDE COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONIZATION
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
ENERGY SOURCES
FUELS
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
MATERIALS
MICROSPHERES
MICROSTRUCTURE
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
REACTOR MATERIALS
REACTORS
SYNTHESIS
URANIUM CARBIDES
URANIUM COMPOUNDS