High-temperature irradiation of niobium-1 w/o zirconium-clad UO/sub 2/. [Compatibility with lithium]
Twenty-four 0.225-in.-diameter and six 0.290-in.-diameter UO/sub 2/ specimens clad with 80 mils of niobium-1 w/o zirconium were irradiated to burnups of 1.4 to 6.0 at. % of uranium at surface temperatures of 900 to 1400/sup 0/C. UO/sub 2/ and lithium were found to be incompatible at these temperatures, and the thick cladding was used primarily to minimize the chances of contact of UO/sub 2/ and the lithium coolant. The thickly clad specimens did not undergo any dimensional changes as a result of irradiation, although it was found that movement of UO/sub 2/ took place in the axial direction by a vaporization-redeposition mechanism. It was found that 32 to 87% of the fission gases was released from the fuel, depending on the temperature of the specimen. Metallographic examination of longitudinal and transverse sections of the specimens indicated the usual UO/sub 2/ microstructure with columnar grains. Grain-boundary thickening was observed in the UO/sub 2/ at higher burnups. The oxygen/uranium ratio of UO/sub 2/ increased with increasing burnup.
- Research Organization:
- Battelle Memorial Inst., Columbus, OH (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6332016
- Report Number(s):
- BMI-1730; ON: DE86000993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
ACTINIDE COMPOUNDS
ALKALI METALS
ALLOYS
CHALCOGENIDES
COMPATIBILITY
CRYSTAL STRUCTURE
ELEMENTS
ENERGY SOURCES
FISSION PRODUCT RELEASE
FUEL CANS
FUELS
LITHIUM
MATERIALS
MATERIALS TESTING
METALLOGRAPHY
METALS
MICROSTRUCTURE
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHYSICAL RADIATION EFFECTS
POST-IRRADIATION EXAMINATION
POWER REACTORS
RADIATION EFFECTS
REACTOR MATERIALS
REACTORS
SNAP REACTORS
SPACE POWER REACTORS
TESTING
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
VERY HIGH TEMPERATURE
ZIRCONIUM ALLOYS
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
ACTINIDE COMPOUNDS
ALKALI METALS
ALLOYS
CHALCOGENIDES
COMPATIBILITY
CRYSTAL STRUCTURE
ELEMENTS
ENERGY SOURCES
FISSION PRODUCT RELEASE
FUEL CANS
FUELS
LITHIUM
MATERIALS
MATERIALS TESTING
METALLOGRAPHY
METALS
MICROSTRUCTURE
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHYSICAL RADIATION EFFECTS
POST-IRRADIATION EXAMINATION
POWER REACTORS
RADIATION EFFECTS
REACTOR MATERIALS
REACTORS
SNAP REACTORS
SPACE POWER REACTORS
TESTING
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
VERY HIGH TEMPERATURE
ZIRCONIUM ALLOYS