[anfilt]

The energy density of uranium is so high that the amount you have to mine compared all the other metals that are mined for even renewables when building a power plant is tiny. Heck you can find rocks in the mountains of Montana and Colorado with so much natural uranium they have that greenish black color from so much natural uranium.

[vcdimension]

You don't need much enriched uranium, but you need to process a lot of dirt to get it. Natural uranium concentrations are around 0.1-0.2% (copper is around 0.6%), and you need 10 tonnes of natural uranium to produce 1 tonne of enriched uranium.

Furthermore, unlike copper, steel and other metals, uranium can't currently be recycled.

See my previous post