Fukushima Unit 4 Fuel Inspection Shows Some More Damaged

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

140430_01 
140430_04
140430_02
140430_03 New type 8×8 zirconium liner fuel

140430_05 140430_06 140430_07 High burnup 8×8 fuel

140430_08 140430_09 140430_10 9×9 fuel

140430_11 140430_12 140430_13

 

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