Pulsed activation measurement of the Doppler effect of uranium-238 over the temperature range 300 to 3115 K
The Doppler effect for /sup 235/U-enriched UO/sub 2/ fuel pellets has been measured by the Pulsed Activation Doppler (PAD) technique in a TRIGA reactor. A combination of static electrical preheating and pulsed fission heating during irradiation was used to perform the measurements at temperatures extending from 300 K to the melting point of UO/sub 2/ (3115 K). The /sup 235/U enrichment in the experimental samples investigated ranged from 0.22 to 12 percent by weight. Measurements were made at under partially molten conditions of UO/sub 2/. Two sizes of pellets were used, with nominal surface-to-mass ratio values of 0.63 and 1.08 cm/sup 2//g, respectively. The experimentally determined values of the Doppler ratio were in good agreement with resonance integral ratios determined from GAROL calculations and extrapolations of the low-temperature Hellstrand correlation.
- Research Organization:
- Univ. of Wisconsin, Madison
- OSTI ID:
- 7191763
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 60:2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Design Study of 300 MWt PWR Fueled With UO{sub 2} Coated Fuel Particle
Doppler measurements of /sup 238/U
Related Subjects
FUEL PELLETS
DOPPLER COEFFICIENT
PULSED NEUTRON TECHNIQUES
TEMPERATURE DEPENDENCE
URANIUM 238
URANIUM DIOXIDE
VERY HIGH TEMPERATURE
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
CHALCOGENIDES
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PELLETS
RADIOISOTOPES
REACTIVITY COEFFICIENTS
URANIUM COMPOUNDS
URANIUM ISOTOPES
URANIUM OXIDES
YEARS LIVING RADIOISOTOPES
220300* - Nuclear Reactor Technology- Fuel Elements