Title 42 › Chapter 23— DEVELOPMENT AND CONTROL OF ATOMIC ENERGY › Subchapter IX— ATOMIC ENERGY LICENSES › § 2142
The Nuclear Regulatory Commission may only allow use of highly enriched uranium (uranium with 20 percent or more U‑235) as a target in U.S. reactors for making medical isotopes if two things are true. First, the NRC must find there is no workable lower‑enriched target for that reactor, and the organization getting the target must promise it will switch to a lower‑enriched option as soon as one can be used. Second, the Secretary of Energy must certify that the U.S. government is actively helping to develop a lower‑enriched target for that reactor. Key terms: an alternative target is one enriched to less than 20 percent U‑235; a target “can be used” if it’s approved by the Department of Energy’s Reduced Enrichment Research and Test Reactor Program and lets most experiments and isotope work continue without a large percentage increase in operating costs; “highly enriched uranium” means 20 percent or more U‑235; “medical isotope” includes molybdenum‑99, iodine‑131, xenon‑133, and other radioactive materials used to make medical or research radiopharmaceuticals.
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The Public Health and Welfare — Source: USLM XML via OLRC
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Citation
42 U.S.C. § 2142
Title 42 — The Public Health and Welfare
Last Updated
Apr 5, 2026
Release point: 119-73not60