Re nuke fuel quantity. I’m adding in the spent fuel pools. When FUkushima happened, our nuke agencies responded with their own research and determined that 75% of nuke plants in the US in 2011 had similar spent fuel pools suspended the same way as in Japan and requested funds for retrofit/safety. While they would have retrofitted by now, they still house spent fuel.
That has to be one of the best examples of "plumb eat up with the dumb@$$" engineering (excuse my "Texian") in the history of mankind!!