The NRC is modernizing nrc.gov with an updated design and improved navigation to enhance usability. We are committed to a smooth transition and will work to minimize any disruption. The site may be briefly unavailable at times during launch. Thank you for your patience.
High-enriched uranium
Uranium enriched to at least 20 percent uranium-235 (a higher concentration than exists in natural uranium ore). For detail, see Uranium Enrichment.
Page Last Reviewed/Updated Thursday, August 27, 2026
Page Last Reviewed/Updated Thursday, August 27, 2026