Irradiation of three T-111 clad uranium nitride fuel pins for 8070 hours at 990/sup 0/C (1815/sup 0/F)
The design and successful operation of three tantalum alloy (Ta-8W-2Hf) clad uranium mononitride (UN) fuel pins irradiated for 8070 h at 990/sup 0/C (1815/sup 0/F) is described. Two pin diameters having measured burnups of 0.47 and 0.90 uranium atom percent were tested. No clad failures or swelling was detected; however, postirradiation clad samples tested failed with 1 percent strain. The fuel density decrease was 2 percent, and the fission gas release was less than 0.05 percent. Isotropic fuel swelling, which averaged about 0.5 percent, was less than fuel pin assembly clearances. Thus the clad was not strained. Thermocouples with a modified hot zone operated at average temperatures to 1100/sup 0/C (2012/sup 0/F) without failure. Factors that influence the ability to maintain uniform clad temperature as well as the results of the heat transfer calculations are discussed.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6861885
- Report Number(s):
- N-73-31614; NASA-TM-X-2878; ON: TI84900933
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220300* -- Nuclear Reactor Technology-- Fuel Elements
ACTINIDE COMPOUNDS
ALLOYS
ENRICHED URANIUM REACTORS
FISSION PRODUCT RELEASE
FUEL CANS
FUEL ELEMENTS
FUEL PINS
IRRADIATION
IRRADIATION REACTORS
MATERIALS TESTING REACTORS
NITRIDES
NITROGEN COMPOUNDS
PBR REACTOR
PERFORMANCE TESTING
PNICTIDES
POST-IRRADIATION EXAMINATION
REACTOR COMPONENTS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
TANK TYPE REACTORS
TANTALUM ALLOY-T111
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TESTING
URANIUM COMPOUNDS
URANIUM NITRIDES
VERY HIGH TEMPERATURE
WATER COOLED REACTORS
WATER MODERATED REACTORS
220300* -- Nuclear Reactor Technology-- Fuel Elements
ACTINIDE COMPOUNDS
ALLOYS
ENRICHED URANIUM REACTORS
FISSION PRODUCT RELEASE
FUEL CANS
FUEL ELEMENTS
FUEL PINS
IRRADIATION
IRRADIATION REACTORS
MATERIALS TESTING REACTORS
NITRIDES
NITROGEN COMPOUNDS
PBR REACTOR
PERFORMANCE TESTING
PNICTIDES
POST-IRRADIATION EXAMINATION
REACTOR COMPONENTS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
TANK TYPE REACTORS
TANTALUM ALLOY-T111
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TESTING
URANIUM COMPOUNDS
URANIUM NITRIDES
VERY HIGH TEMPERATURE
WATER COOLED REACTORS
WATER MODERATED REACTORS