Title 42 › Chapter CHAPTER 23— - DEVELOPMENT AND CONTROL OF ATOMIC ENERGY › Subchapter SUBCHAPTER VIII— - UNITED STATES ENRICHMENT CORPORATION PRIVATIZATION › § 2297h–10a
Limits imports of certain Russian uranium and ties extra imports to verified downblending of Russian weapons uranium. Key words: "completion of the Russian HEU Agreement" means imports from downblending of at least 500 metric tons of weapons highly enriched uranium (HEU); "downblending" means reducing HEU to under 20% uranium-235; "highly enriched uranium of weapons origin" means 90% or more uranium-235 and verified by the Secretary of Energy; "low-enriched uranium" means uranium with under 20% uranium-235 (in forms like UF6 or UO2); "uranium-235" is the isotope 235U; "Russian HEU Agreement" and "Suspension Agreement" are named agreements used here. Before the HEU Agreement is completed, annual import caps apply: in the 4-year span starting 2008, 16,559 kilograms; in 2012, 24,839 kilograms; and in 2013 and each year until completion, 41,398 kilograms. After completion, set yearly caps apply for 2014 through 2023 (485,279 kg in 2014; 455,142 kg in 2015; 480,146 kg in 2016; 490,710 kg in 2017; 492,731 kg in 2018; 509,058 kg in 2019; 514,754 kg in 2020; 596,682 kg in 2021; 489,617 kg in 2022; 578,877 kg in 2023). If Russia agrees to downblend an extra 300 metric tons after completion, an extra 4 kilograms of low-enriched uranium may be imported for every 1 kilogram of Russian weapons HEU downblended the prior year, subject to Energy Department verification, but not more than 120,000 kilograms in any year. The Secretary of Energy must verify origin, quantity, and uranium-235 content using agreed transparency and access measures. Imports are counted in terms of uranium containing 4.4% uranium-235 with a 0.3% tails assay, and Commerce administers and enforces the limits under the Suspension Agreement while minimizing burden on industry. Downblending of HEU not of weapons origin can count if the Secretary of Energy finds it poses a U.S. national security risk; such amounts are converted to 90% HEU equivalents for counting. Starting 90 days after May 13, 2024, unirradiated low-enriched uranium made in Russia or by Russian entities, or swapped to avoid the rule, may not be imported. The Secretary of Energy, with State and Commerce, may waive that ban if no viable alternative source exists to keep a reactor or U.S. nuclear company running, or if it is in the national interest. Any waiver must follow yearly import caps while in effect: 476,536 kg for 2024; 470,376 kg for 2025; 464,183 kg for 2026; and 459,083 kg for 2027. Waivers end no later than January 1, 2028, and the ban does not apply to DOE national security or nonproliferation imports or to non-uranium isotopes. The rules in the import-limits subsection end when the 90-day-after-May-13-2024 date begins, and the ban subsection ends on December 31, 2040.
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The Public Health and Welfare — Source: USLM XML via OLRC
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42 U.S.C. § 2297h–10a
Title 42 — The Public Health and Welfare
Last Updated
Apr 6, 2026
Release point: 119-73