Had it been a gas plant or whatever, it wouldn't have mattered. But it was a nuclear plant, and in a nuclear plant any improbable event like that is a major f* up. That's the core issue.
The numbers I heard a while was something like after first use uranium is 95-97% power, can be reused down to 15-25%. I haven't heard anyone getting this far with it, or even predictions of how radioactive it would be then.