Ooh! Craters I'm familiar with
Like how big of a crater? If I put it deep underground surrounded by obsidian maybe? What if I build it up around y200 near the top of my grape vines that I forgot to put fence and string supports for?
I think I've got around 4 stacks of plutonium ore right now. I've got 2 pitchblende and 3 uranium veins marked that I haven't really touched yet and an ender quarry ready to be placed.
If there was a way to export power across dimensions you could just build and chunkload these things in the end and not really worry about craters or bothering to test things in a creative single player world