The term “completion of the Russian HEU Agreement” means the importation into the United States from the Russian Federation pursuant to the Russian HEU Agreement of uranium derived from the downblending of not less than 500 metric tons of highly enriched uranium of weapons origin.

The term “downblending” means processing highly enriched uranium into a uranium product in any form in which the uranium contains less than 20 percent uranium-235.

The term “highly enriched uranium” has the meaning given that term in section 2297h(4) of this title.

The term “low-enriched uranium” means a uranium product in any form, including uranium hexafluoride (UF₆) and uranium oxide (UO₂), in which the uranium contains less than 20 percent uranium-235, including natural uranium, without regard to whether the uranium is incorporated into fuel rods or complete fuel assemblies.

The term “Russian HEU Agreement” has the meaning given that term in section 2297h(11) of this title.

The term “Suspension Agreement” has the meaning given that term in section 2297h(13) of this title.

The term “uranium-235” means the isotope ²³⁵U.