Nuclear energy represents the last significant domain of US-Russia technical and commercial cooperation. Despite comprehensive sanctions across virtually every other sector, uranium supply chains continue to connect the two nations. Russian enriched uranium fuels approximately 20% of American nuclear power plants, and Rosatom remains the world’s dominant provider of enrichment services.
The Uranium Supply Chain
Russia, through its state corporation Rosatom and subsidiary TENEX, controls approximately 44% of global uranium enrichment capacity. The United States, having allowed its enrichment industry to atrophy during the post-Cold War era, depends on Russian-origin enriched uranium for a significant share of its nuclear fuel requirements.
The 1993 Megatons to Megawatts program, which converted 500 metric tons of Russian weapons-grade uranium into commercial reactor fuel, established the commercial relationship that persists today. While that program ended in 2013, commercial supply contracts continued and were only recently subject to import restrictions.
Sanctions Exemptions
Nuclear fuel has been largely exempt from comprehensive sanctions due to the practical difficulty of rapidly replacing Russian enrichment capacity. A complete ban on Russian uranium imports would disrupt fuel supply for American reactors and potentially force premature shutdowns. However, legislation to phase out Russian uranium imports has been enacted, with implementation timelines extending through the end of the decade.
Domestic Enrichment Revival
The US Department of Energy has invested in reviving domestic enrichment capability through contracts with Centrus Energy and other domestic producers. However, scaling enrichment capacity to replace Russian imports requires years of construction and billions in investment. The HALEU (High-Assay Low-Enriched Uranium) program for advanced reactors faces particular urgency, as Russia is essentially the sole commercial supplier of this fuel type.
Assessment
The nuclear energy sector illustrates both the depth of US-Russia interdependence and the difficulty of rapid decoupling. Complete elimination of Russian nuclear fuel dependency is achievable but requires a decade-long transition period and sustained investment in domestic and allied enrichment capacity. Until this transition is complete, nuclear energy will remain an anomalous island of cooperation in an otherwise hostile bilateral landscape.