Trolls and exploiters at it again. If god intended for us to make nuclear energy then he would've made it appear in nature. Stupid scientists making stuff from gods creation.
Uranium is still there, it's just sub-critical mass so the reaction isn't happening. Uranium 235 (which would have powered the reaction) has a half life of ~700 million years. So there's still probably a good bit of it there - the reaction is thought to have stopped about 1.7 billion years ago.