Worldgen IC2 ore in stone at low Y levels; needs iron pickaxe; processed via Macerator for nuclear fuel.
Step-by-step guide
Craft at least an iron pickaxe before searching for Uranium Ore. Stone and wooden tools will destroy the block without dropping anything, wasting the vein.
Mine down into stone at low Y levels in the Overworld, in a depth range similar to vanilla diamond. Veins are small, usually 1–3 blocks, so branch-mine across a wide area.
When you find Uranium Ore, mine every connected block. Each block drops itself as an item, so collect all of them before moving on.
Return to base and feed the Uranium Ore blocks into a Macerator. Each block becomes Crushed Uranium Ore, the first intermediate product of the IC2 nuclear chain.
Process Crushed Uranium Ore in an Ore Washing Plant, then in a Thermal Centrifuge, to obtain Tiny Piles of Uranium-235 and Uranium-238 used to craft nuclear fuel rods.
Always carry a backup iron or diamond pickaxe; mining Uranium Ore with the wrong tool gives zero drops and the vein cannot be recovered.
An iron pickaxe or better. Stone and wooden pickaxes will break the block without producing any drop.
It spawns in stone at low Y levels in the Overworld, in a depth range similar to vanilla diamond ore, in small veins of 1–3 blocks.
No. The block drops itself and a vanilla furnace produces nothing useful. You must process it through IC2 machines such as the Macerator.
It is processed via Macerator, Ore Washing Plant and Thermal Centrifuge into Uranium-235 and Uranium-238, which are combined into fuel rods for the IC2 Nuclear Reactor.
No. It is added by IndustrialCraft 2 and only appears on AlaCraft servers running the IC2 Experimental modpack.