Abstracts and Available Papers Presented at the
1999 International RERTR Meeting

Stable In-reactor Performances at Low Temperature of U-10wt.%Mo Dispersion Fuel Containing Centrifugally Atomized Powder

Ki-Hwan Kim, Jong-Man Park, Chang-Kyu Kim
Korea Atomic Energy Research Institute
Taejon, Korea

G. L. Hofman, M. E. Meyer, J. L. Snelgrove
Argonne National Laboratory
Argonne, Illinois, USA

ABSTRACT

In order to examine the in-reactor performances of very-high-density dispersion fuels for high flux performance research reactors, U-10wt.%Mo microplates containing centrifugally atomized powder have been irradiated at low temperature.  The U-10wt.%Mo dispersion fuels show stable in-reactor irradiation behaviors even at high burn-up, similar to U3Si2 dispersion fuels. The atomized U-10wt.%Mo fuel particles have a fine, uniform fission gas bubble size distribution.  Moreover, only one third areas of the atomized fuel cross-sections at 70at.% burn-up show fission gas bubble-free zones.  This appears the result of segregation into high Mo and low Mo.

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