TEPCO released a small selection of images of some of the fuel removed from the unit 4 spent fuel pool. They selected different types of fuel to examine. They provide some contrast to how each fuel type was damaged by the conditions in the pool during the disaster. The 8×8 high burnup fuel appears to have fared the worst with thicker corrosion towards the bottom. The 9×9 and the new type fuel appear to have fared better. TEPCO did not include additional information about the age of each assembly when the disaster happened or the position of the assembly in the pool, both factors could impact the damage extent.
8×8 standard fuel
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