So, maybe this is hindsight, but why were battery inspections and storage in the same location? If the batteries failed inspection (which I’m guessing the exploding ones would have, or at least do now) they should be kept separately from known good batteries right?
If anyone wants to understand the pain of fissile uranium production, play factorio. Gives you a little tiny fraction of what it’s like to produce enough fuel for a powerplant. You need a lot more for a bomb.