Reaction layer growth and reaction heat of U-Mo/A1 dispersion fuels using centrifugally atomized powders

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The growth behavior of reaction layers and heat generation during the reaction between U-Mo powders and the Al matrix in U-Mo/Al dispersion fuels were investigated. Annealing of 10 vol.% U-10Mo/Al dispersion fuels at temperatures from 500 to 550 degreesC was carried out for 10 min to 36 h to measure the growth rate and the activation energy for the growth of reaction layers. The concentration profiles of reaction layers between the U-10Mo vs. Al diffusion couples were measured and the integrated interdiffusion coefficients were calculated for the U and Al in the reaction layers. Heat generation of U-Mo/Al dispersion fuels with 10-50 vol.% of U-Mo fuel during the thermal cycle from room temperature to 700 degreesC was measured employing the differential scanning calorimetry. Exothermic heat from the reaction between U-Mo and the Al matrix is the largest when the volume fraction of U-Mo fuel is about 30 vol.%. The unreacted fraction in the U-Mo powders increases as the volume fraction of U-Mo fuel increases from 30 to 50 vol.%. (C) 2003 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2003-09
Language
English
Article Type
Article
Citation

JOURNAL OF NUCLEAR MATERIALS, v.321, no.2-3, pp.210 - 220

ISSN
0022-3115
DOI
10.1016/S0022-3115(03)00251-4
URI
http://hdl.handle.net/10203/247013
Appears in Collection
NE-Journal Papers(저널논문)
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