Abstract
A shielded Cameca microbrobe, MS 46, was used to examine a UC sample canned in SAP and irradiated to a burnup of 0.7%. An annular zone at about 40% of the outer sample radius was seen to contain precipitates loaded with fission products: microbrobe analysis showed the precipitates to be U 2 (Tc, Ru, Rh)C 2. Small amounts of palladium can be stabilized in this phase. Zirconium and molybdenum were verified in homogeneous distribution in the fuel. The Vickers hardness of the irradiated UC is 1000–1200 kp/mm 2. No signs of incompatibility with the canning material were detected.
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