Uranium enrichment

Material with this level of enrichment is called highly enriched uranium or HEU.In the enrichment process, uranium hexafluoride gas is fed into rapidly spinning cylinders.Laughter, Mark D. (2007) Profile of World Uranium Enrichment Programs - 2007.Uranium Enrichment - Introduction.Uranium Enrichment technologies.Material with this level of U-235 is called low enriched uranium or LEU.Nuclear bombs cannot be made from natural or low enriched uranium.In practice, uranium containing at least 90 percent U-235 has been used to make nuclear weapons.Examples of other fissile materials, besides uranium-235, are uranium-233 and plutonium-239.Only four technologies have been used on a large scale for enriching uranium.