Depleted uranium – huge amounts are created by uranium enrichment

Uranium Enrichment Creates Massive Amounts Of Depleted Uranium (DU) – Used In Weapons Of Mass DestructionHow and where is depleted uranium manufactured? Most of the byproducts (garbage) “from uranium enrichment (96%) is depleted uranium (DU)… There are vast quantities of depleted uranium in storage. The United States Department of Energy alone has 470,000 tons.[1] About 95% of depleted uranium is stored as uranium hexafluoride (UF6).”

http://en.wikipedia.org/wiki/Nuclear_fuel_cycle