or even just look at the reactor designs.

we are actually using the worst design for all our reactors. see, we build ones we have to tweak to stop them going wrong and stay running safely.

there is a reactor design that's the opposite.  you have to keep tweaking them to keep them running. stop tweaking? it safes itself. no booms no run away fission.

the design's called "Pebble Bed" and easy to find information on.

as to waste, we can actually reprocess the spent fuel and reuse it. several times. but current policies prevent this.

Airport security is a burden we must all shoulder. Do your part, and please grope yourself in advance.