Analysis and modeling of fission product release from various uranium-aluminum plate-type reactor fuels
- Oak Ridge National Lab., TN (United States)
This articles provides a perspective overview and analysis of volatile of fission-product release data obtained for uranium-aluminum (U-Al) reactor fuels, U-Al[sub x] (alloy and dispersed), U[sub 3]O[sub 8]-Al (dispersed), U[sub 3]Si[sub 2]-Al (dispersed), and U[sub 3]Si-Al (dispersed). Several shortcomings in the experimental data bases have been highlighted and areas of uncertainty related to extrapolation of correlation predictions identified. Fission-product release characteristics for the U-Al reactor fuels have been shown to be radically different from those for the light-water-reactor fuels. Significant dependencies that exist on ambient medium, rate of release, fuel type and structure, fission-product chemistry, and burnup are analyzed. The potential inaccuracies involved in using the CORSOR (i.e., first-order exponential) approach for modeling release rate dependence for U-Al fuels with time are demonstrated, and an alternate formulation that captures characteristic trends is suggested. A library of correlations and methods for predicting release rates (for each individual volatile species) that may vary with time, ambient environment, burnup, and temperature were developed on the basis of analysis of characteristic data trends, phenomenological aspects, and regression analysis. A comparison of suggested correlation predictions against measurements resulted in an overall mean value and standard deviation of 1.02 and 0.22, respectively, over the entire temperature range investigated. Overall, statistics improve significantly (mean, 1.0; standard deviation, 0.09) if the Hanford Engineering Development Laboratory data are excluded. 16 refs., 6 figs., 8 tabs.
- OSTI ID:
- 6772568
- Journal Information:
- Nuclear Safety; (United States), Vol. 33:1; ISSN 0029-5604
- Country of Publication:
- United States
- Language:
- English
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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BURNUP
EXTRAPOLATION
REGRESSION ANALYSIS
FISSION PRODUCT RELEASE
EXPERIMENTAL DATA
FISSION PRODUCTS
CHEMICAL ANALYSIS
ALUMINIUM ALLOYS
CORRELATIONS
ENVIRONMENTAL EFFECTS
INTERMETALLIC COMPOUNDS
OXYGEN
REACTOR FUELING
SILICON
STATISTICAL DATA
TEMPERATURE RANGE
URANIUM BASE ALLOYS
ACTINIDE ALLOYS
ALLOYS
DATA
ELEMENTS
INFORMATION
ISOTOPES
MATERIALS
MATHEMATICS
NONMETALS
NUMERICAL DATA
NUMERICAL SOLUTION
RADIOACTIVE MATERIALS
SEMIMETALS
STATISTICS
URANIUM ALLOYS
220300* - Nuclear Reactor Technology- Fuel Elements
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