Release of volatile fission products from uranium dioxide
Post-irradiation anneal experiments have been used to determine the release of iodine and tellurium from lightly irradiated UO/sub 2/ samples maintained at stoichiometry. The applicability of the equivalent-sphere model of diffusion to release of fission gases has been tested. Diffusion coefficients and activation energies have been evaluated. The diffusion coefficient of /sup 132/Te at 1400/sup 0/C was found to be of an order-of-magnitude larger than that of /sup 131/I. This result may be of importance for an understanding of the pellet-cladding interaction and for a better evaluation of the source term for fission-product release under accident conditions. Qualitatively, the influence of the stoichiometry on the release of /sup 133/Xe, /sup 131/I, and /sup 132/Te has been established.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6277040
- Report Number(s):
- LBL-15222; ON: DE83012471
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
22 GENERAL STUDIES OF NUCLEAR REACTORS
FUEL-CLADDING INTERACTIONS
URANIUM DIOXIDE
FISSION PRODUCT RELEASE
ANNEALING
IODINE 131
POST-IRRADIATION EXAMINATION
STOICHIOMETRY
TELLURIUM 132
ACTINIDE COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
DAYS LIVING RADIOISOTOPES
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INTERMEDIATE MASS NUCLEI
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IODINE ISOTOPES
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NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
TELLURIUM ISOTOPES
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