Highly Enriched Uranium (HEU) 3
Highly Enriched Uranium (HEU) 3 : Uranium whose content of the fissile isotope uranium- 235 has been increased through enrichment to 20 percent or more (by weight). See: natural uranium. Additional information may be needed in some EISs: Highly enriched uranium can be used in making nuclear weapons and also as fuel for some isotopeproduction, research, naval propulsion, and power reactors