U.S. Nuclear Grid Still Reliant on Russian Enrichment

The United States maintains a significant structural dependency on Russia for nuclear fuel enrichment, a reality that persists despite recent diplomatic and legislative actions. According to Foreign Policy, Moscow’s state-owned entity Rosatom provided 26 percent of the enrichment services purchased by U.S. nuclear utilities in 2025. This reliance highlights a persistent gap in domestic capacity that has remained unaddressed for over a decade.

Washington banned imports of Russian low-enriched uranium in August 2024, a move that prompted Moscow to impose reciprocal export restrictions three months later. However, these measures appear to be largely symbolic. The underlying supply chains have not shifted sufficiently to remove Russian influence, leaving U.S. energy infrastructure exposed to geopolitical leverage that officials may prefer to downplay.

Legacy of the Megatons Program

This dependency stems directly from the Megatons to Megawatts initiative, which operated between 1995 and 2013. The program successfully converted 500 metric tons of Soviet weapons-grade uranium into reactor fuel, supplying up to 10 percent of U.S. electricity during its peak. While the $12 billion effort eliminated a quarter of the global stock of bomb-grade uranium, it inadvertently discouraged investment in domestic enrichment infrastructure.

As the program wound down, America’s sole domestically owned enrichment plant in Paducah, Kentucky, ceased operations. The absence of a robust national alternative forced utilities to turn to foreign providers. Today, the only commercial-scale facility operating within the United States is owned by Urenco, a multinational corporation with British, Dutch, and German roots, leaving the country without a fully sovereign enrichment backbone.

Economic Costs of Continued Reliance

The financial implications of this reliance are substantial and growing. Rosatom’s bill for enrichment services reached $1 billion in 2025, a figure approximately 70 percent higher than the annual average recorded between 2019 and 2021. Shipments from January to July 2025 totaled $631 million, indicating that the annualized cost is on track to match or exceed the previous year’s total.

U.S. utilities continue to purchase these services despite the geopolitical risks, suggesting that domestic alternatives are not yet cost-competitive or available at scale. The persistence of these payments underscores the difficulty of decoupling from Russian supply chains in a sector where infrastructure investment is slow and capital-intensive.

Future of Domestic Enrichment

Efforts to restore domestic enrichment capacity are underway but face significant hurdles. Companies like Centrus are working to expand production, yet the timeline for achieving independence is long. Until domestic capacity can match the volume and cost-efficiency of Russian suppliers, the U.S. nuclear sector will remain vulnerable to external pressure.

The next phase of this dynamic will depend on policy decisions regarding subsidies and regulatory frameworks for domestic enrichment plants. Observers should watch for legislative moves that prioritize energy security over short-term cost savings, as well as any further shifts in U.S.-Russia trade relations that could impact fuel supply contracts.