Board Thread:Questions and Answers/@comment-84.186.198.165-20130610102709/@comment-8540798-20130610132341

If I were you, I'd set up a Breeder Reactor. The end result of this process is 8 Uranium Cells from ONE Refined Uranium. Surround the Uranium Cell in your Crafting table with 8 empty cells.

Then check out the Mindcrafter's video tutorial on Breeder Reactors.