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Effects of Thermal Treatment on the Co-rolled U-Mo Fuel Foils

  • Jan-Fong Jue (a1), Dennis D. Keiser (a1), Tammy L. Trowbridge (a1), Cynthia R. Breckenridge (a1), Brady L. Mackowiak (a1), Glenn A. Moore (a1), Barry H. Rabin (a1) and Mitchell K. Meyer (a1)...

Abstract

A monolithic fuel design based on U–Mo alloy has been selected as the fuel type for conversion of United States’ high-performance research reactors (USHPRRs) from highly enriched uranium (HEU) to low-enriched uranium (LEU). In this fuel design, a thin layer of zirconium is used to eliminate the direct interaction between the U–Mo fuel meat and the aluminum-alloy cladding during irradiation. The co-rolling process used to bond the Zr barrier layer to the U–Mo foil during fabrication alters the microstructure of both the U–10Mo fuel meat and the U–Mo/Zr interface. This work studied the effects of post-rolling annealing treatment on the microstructure of the co-rolled U–Mo fuel meat and the U–Mo/Zr interaction layer. The U–Mo/Zr interaction-layer thickness increased with the annealing temperature with an Arrhenius constant for growth of 184kJ/mole, consistent with a previous diffusion-couple study. The phases in the U–Mo/Zr interaction layer produced by co-rolling, however, differ from those reported in the previous diffusion-couple study.

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[1] Meyer, M. K, Hofman, G. L., Hayes, S. L., Clark, C. R., Wiencek, T. C., Snelgrove, J. L., Strain, R. V., and Kim, K.-H., Journal of Nuclear Materials 304 221236 (2002).
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[3] Leenaers, A., Van den Berghe, S., Van Eyken, J., Koonen, E., Charollais, F., Lemoine, P., Galzavara, Y., Guyon, H., Jarousse, C., Geslin, D., Wachs, D., Keiser, D., Robinson, A., Hofman, G., Kim, Y. S., Journal of Nuclear Materials 443 439448 (2013).
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Keywords

Effects of Thermal Treatment on the Co-rolled U-Mo Fuel Foils

  • Jan-Fong Jue (a1), Dennis D. Keiser (a1), Tammy L. Trowbridge (a1), Cynthia R. Breckenridge (a1), Brady L. Mackowiak (a1), Glenn A. Moore (a1), Barry H. Rabin (a1) and Mitchell K. Meyer (a1)...

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