uraninite + sulphuric acid = yellowcake solution
yellowcake solution + heat = yellowcake powder
yellowcake powder + hydrogen = uranium dioxide
uranium dioxide + hidrofluoric gas = uranium tetrafluoride 
uranium tetrafluoride + fluorine = uranium exafluoride gas
uranium exafluoride gas + centrifuge = 5% chance enriched uranium exafluoride solid
enriched uranium exafluoride solid + hydrogen = enriched uranium tetrafluoride + magnesium + heat = enriched uranium!