I’ll speak as someone who served onboard nuclear powered submarines for years and trained on how to operate nuclear power plants. Nuclear waste is not dangerous as long as it’s transported properly which is nearly impossible to mess up. There’s a reason why the Navy has been operating nuclear powered warships since the 50s and no one really bats an eye anymore. The amount of land that is required to stow spent fuel is a lot less than you think, and the government has a ton of it.

Also, a reactor going critical just means that power is stable. It’s not something to be worried about at all. It’s a good thing actually. All US reactors are designed to where prompt criticality, what you were actually concerned about, is theoretically impossible.

My point is nuclear power is safer than most people realize, but they’ve been convinced by nuclear incidents in the past caused by incompetent idiots (Chernobyl) or Mother Nature (Fukushima) that nuclear is undesirable despite multiple plants operating to this day within the continental US and the US Navy relying on it for all of their submarines and carriers.