b'A higher magnification image,which there is a planar front of Am asFigure 3. a) High magnification in Figure 3a, shows details nearshown in Figure 3b. This difference isBSE detail of the FUTURIX-acladding microstructure observed inlikely largely driven by the differenceFTA (left) and b) X501 (right) FUTURIX-FTA sample. The claddingin cladding composition where themicrostructure near the cladding.is AIM1 (austenitic steel), whichAFC-1H and X501 experiments were contains ~ 0.5 wt.% Ti and it appearsclad with a ferritic-martensitic (F/M) the Ti has precipitated in the claddingsteel, but more research into the during irradiation. There are alsophenomenon is needed. precipitates of lanthanides (La, Ce,The overall microstructure evolution Nd, and others) in the fuel sideseems not affected by minor actinides near the Zr layer, which was formedaddition compared to expected during fabrication. However therebehavior of conventional U-19Pu-does not appear to be any attack of10Zr ternary metal fuels. A different the cladding from the major fissionfuel cladding chemical interaction product lanthanides (La, Ce, Nd).(FCCI) phenomena is clear between The most significant feature observedthe use of AIM1 (austenitic steel) and in Figure 3a is an integranularHT9 F/M cladding.infiltration of Am and Sm into the cladding. This infiltration is very different from AFC-1H and X501 in 2019|AFC ACCOMPLISHMENTS 215'