Front-end nuclear fuel supply cooperation: Turning allied interdependence into strategic advantage

This distribution-often described as a vulnerability-is in fact the foundation of a strategic advantage for the United States and its closest partners. Allied interdependence, when deliberately orchestrated, creates a resilient, commercially competitive fuel cycle capable of matching and beating Russian and Chinese state-controlled offerings. State-controlled vendors bring integrated financing packages that disparate allied vendors find difficult to match, so narrowing that financing gap is itself part of the cooperation agenda.

The best path forward is a deliberate, multilateral architecture in which each Sapporo Five member or ally contributes its strongest offerings, with multiple qualified vendors in each category to preserve competitive discipline, supported by long-term offtake, shared infrastructure, and complementary public investment.

Strategic context

As of the second Nuclear Energy Summit, held in Paris in March, 38 countries have endorsed the Declaration to Triple Nuclear Energy globally by 2050. The build-out of hyperscale data centers has created firm, baseload electricity demand on a scale not seen in at least a generation, with major technology firms entering long-term power purchase agreements with utility and developer partners. National security considerations, sharpened by the wars in Ukraine and the Middle East, have made fuel supply resilience a first-order strategic question rather than a procurement footnote.

Yet the front end of the fuel cycle-on which this all depends-remains structurally vulnerable. Russia's state-owned Rosatom and its subsidiary Tenex hold roughly 40-46 percent of global enrichment capacity and, until recent restart efforts, supplied a meaningful share of the world's conversion services.

For decades, Western reactor operators have been able to source enriched uranium product at world prices precisely because Russian capacity remained competitive. That arrangement is no longer politically or morally tenable. The U.S. Prohibiting Russian Uranium Imports Act of 2024, the creation of the Sapporo Five, and a wave of national programs across allied capitals reflect a shared recognition that the West must rebuild its fuel cycle at scale and not rely on Russia for enrichment.

This is the challenge. Conversion plants, enrichment cascades, and HALEU-capable deconversion lines do not become more economical when duplicated nationally; they become less competitive, slower to deploy in their sum, and more fragmented in their technical standards. The strategic opportunity lies in treating the economies of the Sapporo Five, together with their close partners, as a single market in which capability is allied-redundant rather than nationally redundant, governed by shared standards, and underwritten by long-term commercial contracts that give private investors the certainty they require.

A single allied market presumes reliable trade relationships across the Sapporo Five and their partners. Recent tariff measures among allied governments, however well motivated in their domestic context, complicate that presumption. To ensure cooperation, allied capitals will need to be predictable partners to one another in nuclear-related goods and services, even where they may retain tensions in other sectors. Long-term cooperation is not compatible with the volatility arising from shifting unilateral trade barriers between allies.

The argument for cooperation is as much commercial as it is political. The arithmetic of a tripling of global nuclear power-and of new advanced reactors that will be deployed as part of it-does not work without coordinated front-end investment. It is in each ally's interest to cooperate, and it is in the collective interest of the West to do so deliberately.

Current front-end capabilities

The front end of the fuel cycle comprises five sequential stages, each with distinct capital, regulatory, and technological characteristics: mining and milling; conversion; enrichment; fuel fabrication; and the family of deconversion, metallization, and specialty fuel-form steps required by advanced fuel designs. Mapping allied capabilities across these stages reveals both a coherent footprint and a set of bottlenecks that no single country can resolve.

Mining and sourcing remain the most geographically diversified stage. Cameco's Cigar Lake and McArthur River operations in Saskatchewan, Canada, Orano's interests in Canada and Niger, and a growing portfolio of Australian and U.S. domestic projects provide a meaningful share of global primary supply. Kazakhstan, while not a Sapporo Five state, supplies more than 40 percent of the world's mined uranium; routing that material westward without Russian transit is an active policy and logistics question rather than a settled one. Mining is not itself a binding constraint on allied supply over the medium term, provided spot and long-term contract markets continue to attract sufficient capital to Western and allied projects rather than to vertically integrated, state-controlled alternatives.

Conversion is materially tighter. The Western conversion footprint comprises Cameco's Port Hope facility in Ontario, Canada; Orano's Pierrelatte and Malvési operations in France; and the recently restarted ConverDyn plant at Metropolis, Ill. Combined nameplate capacity is sufficient for current Western reactor demand only if all of these operate at high availability. Russian-sourced uranium hexafluoride (UF₆) continues to leave the market in a managed-rather than abrupt-fashion, but a single unplanned outage would translate directly into market tightness, as observed during the pause in operations at Metropolis from 2017 to 2023.

Enrichment is the stage where the gap is most visible-and the most consequential. Urenco's centrifuge plants in Almelo, the Netherlands; Gronau, Germany; Capenhurst, England; and Eunice, N.M.-along with Orano's Georges Besse II at Tricastin, France-constitute the bulk of allied capacity. Centrus operates the American Centrifuge Plant at Piketon, Ohio, which produced the first commercial-scale HALEU in the United States in more than 70 years, approaching 900 kilograms per year of HALEU output.

Japan Nuclear Fuel Limited's Rokkasho enrichment plant is the only allied commercial enrichment capacity in East Asia. JNFL is scaling the plant from approximately 112.5 metric ton separative work units per year today toward an approved capacity of 450 tSWU per year, with a long-run design ceiling of 1,500 tSWU per year. (tSWU, equivalent to 1,000 kg SWU, is the standard measure of enrichment effort.) Orano has committed approximately $1.8 billion to a 30 percent capacity expansion at Tricastin by 2028. The United Kingdom has committed £300 million to launch Europe's first domestic HALEU program, anchored at Capenhurst.

These commitments, while real and material, cannot yet fully replace Russian SWU within the timeframe needed to support both the low-enriched uranium needs of existing Western reactors and the advanced reactors that will require HALEU during the late 2020s and 2030s. The Sapporo Five announced at COP28 a target of mobilizing at least $4.2 billion in combined government-led and private investment over three years. That target has been exceeded, with $5.6 billion reported to have been mobilized as of September 2024. Even at this pace, demand-side projections (particularly if orders for small modular and advanced reactors accelerate) argue for additional capacity beyond what is currently committed.

Fuel fabrication is in a better position, with Westinghouse, Framatome, Global Nuclear Fuel (a GE Vernova-Hitachi venture), Mitsubishi Nuclear Fuel, and KEPCO Nuclear Fuel covering the LEU uranium dioxide (UO₂) fabrication needs of the existing Western fleet across pressurized water reactors, boiling water reactors, and Russian VVER-compatible product lines.

The structural question in fabrication is not capacity but qualification. When a reactor operator wishes to switch fabricators (for example, to substitute Westinghouse VVER-440 or VVER-1000 fuel for previously Russian-supplied assemblies), the qualification, licensing, and core management workstreams typically require multiyear lead times. Allied cooperation can compress this through mutual recognition of qualification data, harmonized acceptance criteria, and shared operating experience, particularly for Eastern European operators of Soviet-designed reactors.

Deconversion and metallization for advanced fuels is the stage that is least prepared for the future. The reactor designs now moving toward demonstration and commercial deployment collectively require fuel forms that include TRISO particles, metallic uranium-zirconium alloys, and uranium-oxide pellets at HALEU enrichment levels. These fuels require UF₆ to be deconverted to a usable feedstock of UO₂ powder, UF₄, or uranium metal and, in many cases, further processed into kernels, particles, or fuel slugs.

This is not just for advanced reactors. Lightbridge, for example, is developing a metallic uranium-zirconium fuel to increase power output and enhance the safety of existing and new PWRs and BWRs. The fuel will require HALEU enrichment, along with deconversion and metallization capacity. That is a clear illustration of how the front-end needs of the operating reactor base and those of the advanced reactor pipeline now overlap. This area is currently dominated by national laboratory-scale facilities at Idaho and Oak Ridge, a small number of pilot-scale industrial lines, and a handful of first-of-a-kind commercial projects. Without parallel investment in deconversion and metallization at an industrial scale, increased HALEU SWU output will not translate into deliverable advanced reactor fuel.

It is also at this stage that innovation has the greatest potential to reset the cost curve. The SILEX laser-based enrichment technology, being commercialized in the United States by Global Laser Enrichment (a joint venture of Silex Systems and Cameco), achieved technology readiness level-6 in October 2025-the first laser enrichment process to do so at an industrial scale. GLE submitted its full Nuclear Regulatory Commission license application for the Paducah Laser Enrichment Facility in July 2025, with operations targeted to begin no later than 2030.

Public assessments of the technology suggest 30-50 percent reductions in energy consumption per SWU, compared with centrifuge cascades, with a smaller physical footprint and inherent flexibility across enrichment levels, including HALEU. If laser enrichment delivers on these characteristics at commercial scale, it will offer the West a path to HALEU production that is structurally lower cost than centrifuge alternatives.

Cooperation framework

A framework for allied front-end cooperation must accomplish three things: align capacity expansion with credible long-term demand, provide new and expanding nuclear nations with a practical pathway to participation that does not require building national capability from scratch, and enable innovation in technology and commercial structures to develop without being absorbed by incumbent interests.

Practical pathways. The strongest predictor of on-time, on-budget nuclear construction in recent decades has not been a country's gross technical capability but whether the project has a reference build with the same or similar regulatory basis; the same design; and, where possible, the same engineering, procurement, and construction (EPC) firm and the same specialist trades and crafts personnel.

The economic case for reference plant deployment is illustrated by the APR1400 fleet at Barakah in the United Arab Emirates, where an experienced team delivered four units in sequence. Even there, the first units carried a measurable learning curve, which only strengthens the argument for repeating the same reference design across subsequent units rather than introducing modifications between them. When programs depart from a stable reference, cost outcomes have inevitably suffered.

This argument runs against a powerful local political imperative. While the localization imperative is legitimate for capturing employment and industrial benefits, it is also frequently the single largest source of cost and schedule risk. The honest framing is that localization should be sequenced. The first units should be built by an experienced international team with structured technology transfer, training, and supplier qualification programs that allow domestic content and value to grow in subsequent units.

Some localization will occur naturally. Civil works, concrete production, general construction labor, and a meaningful share of installation activity are inherently local. The most durable economic benefit, however, comes not from peak construction employment but from the permanent, high-skilled positions created once the plant is operating and from the wider industrial activity that affordable, firm power attracts to the surrounding region. Importing an experienced EPC team is the most likely route to delivering the operating phase on schedule, where the local economic gains accrue.

Front-end fuel supply fits naturally into this sequencing. A new entrant should not seek to develop a national conversion or enrichment capability on the basis of a single reactor. It should instead secure long-term offtake from allied facilities and participate in the broader allied fuel cycle as a customer first, a supplier second, and over time (if at all) as a primary capability holder.

Leverage shared infrastructure and expertise. In commercial terms, allied front-end infrastructure is currently used by individual utilities under bilateral contracts. There is no structural reason this must continue. Long-term offtake agreements that pool demand from multiple allied utilities (coordinated through the Sapporo Five framework or a successor instrument) could provide Western enrichment and conversion expansions with demand certainty and allow new entrant nations to participate without stand-alone bilateral negotiations with a single supplier. Similarly, the qualification and licensing infrastructure built up by mature operators can be made available to new entrants through deliberate technical assistance arrangements. This is a function for which the OECD Nuclear Energy Agency, the International Atomic Energy Agency, and bilateral civil nuclear cooperation agreements are already partially configured, yet it remains underused.

A practical near-term step is to develop harmonized qualification and acceptance criteria for HALEU and advanced reactor fuel forms across allied jurisdictions. At present, a fuel qualification campaign accepted by the NRC is not automatically recognized by nuclear regulatory authorities in other Sapporo Five states, even where the underlying technical basis is identical. This is a tractable problem and one in which standards bodies can play a coordinating role.

Recommendations

The recommendations below are framed for ministerial-level and senior industrial decision-makers in the Sapporo Five and their close partners. They are not exhaustive, but they are the steps for which the strategic and commercial case is strongest in the near term.

Frameworks. Existing bilateral civil nuclear cooperation agreements, such as 123 Agreements, remain the legal foundation for most fuel cycle commerce. They are necessary, but on their own, they are not sufficient. The Sapporo Five process should be formalized, with a dedicated secretariat function (possibly housed within the OECD NEA) and a published work program covering joint capacity planning, qualification harmonization, and supply chain visibility. The objective is to reduce coordination costs. New entrant nations should be offered structured association with this framework and conditional adherence to nonproliferation, safeguards, and quality standards.

Partnership structures. Coordinate U.S. instruments (the Department of Energy's HALEU Availability Program and the Inflation Reduction Act's $2.7 billion appropriation for domestic enrichment and HALEU production), with allied tools (the U.K. Nuclear Fuel Fund, France's ongoing support for Orano's Tricastin expansion, and the Japanese Ministry of Economy, Trade, and Industry's cofunding of JNFL) so that they collectively derisk a coherent set of allied projects rather than competing for the same private investment.

Mechanisms that have proved effective share a common feature: they reward private investors for adding capacity to the allied system, not merely the national one. Public offtake contracts at floor prices, sovereign export credit facilities for new-entrant offtake, mutual investment between allied state-backed entities, and demand-aggregation contracts coordinated across utilities all fit this pattern. Each can be deployed under existing legal authorities, but what has been missing is a coordinating mechanism to align their use across allied capitals. At the same time, integrated financing packages offered by state-controlled vendors to prospective customers, covering construction credit, fuel supply, and sometimes operations, are themselves a competitive instrument. Matching such offers with coordinated allied financing is one of the more direct ways in which cooperation translates into market share.

Supply chain. Resilience is created by building and strengthening networks that ensure that the failure of any single node does not propagate. For the front-end fuel cycle, this implies a small set of operational targets:

At least two allied conversion sources for every utility, with a qualified UF₆ product capable of substitution within commercial timeframes.

At least two allied enrichment sources for every reactor program, including HALEU programs.

Strategic uranium and enriched uranium product inventories at the sovereign or pooled-allied level, sized to cover plausible disruption windows.

Dual-sourced fabrication for all reactor types operating in the allied fleet, with mutual recognition of fuel qualification data where the technical basis is equivalent.

Movement toward these conditions requires only strategic long-term thinking, commercial discipline, and a willingness to pay a modest premium over the lowest-cost single-source option. That premium is best understood as an insurance cost, and it is one that the existing Western fleet could absorb without material consequence for delivered electricity prices. Indeed, the impacts on overall costs are not necessarily always upward. Beyond resilience, sustaining at least two qualified vendors in each category serves a second purpose: preserving the competitive pressure that single-source procurement structurally removes, and gives allied utilities a credible alternative when commercial terms drift.

Innovation and laser enrichment. The existing centrifuge fleet, supported by mature operators with established political relationships, captures the bulk of public capacity-expansion funding. At the same time, laser enrichment (which has the potential to deliver HALEU at materially lower cost) is forced to develop on a slower, commercial-only timeline. The recommendation here is not to subsidize laser enrichment preferentially-it is to ensure the technology has equal access to public offtake and demonstration funding and that licensing pathways reflect the maturity demonstrated by GLE's technology readiness level-6 achievement and NRC license application. The same principle applies to emerging deconversion and metallization processes at allied vendors and national laboratories.

A call to action

The Western front-end fuel cycle has real, distributed capabilities across mining, conversion, enrichment, and fabrication sufficient to support tripling nuclear generation, and allied governments have committed to take steps on emerging advanced fuels. The work ahead is to convert distributed capability into integrated capacity.

That work is fundamentally cooperative. It cannot be accomplished by any single allied nation acting alone-nor should it be. The interdependence that has been described (fairly) as a potential vulnerability is more accurately understood as the architecture on which a durable, competitive, and innovation-friendly Western fuel cycle can be built, provided that architecture is acknowledged, planned, and underwritten as such.

Three actions, in the near term, would do most to advance this:

1. Formalize the Sapporo Five framework, with a published joint capacity plan, harmonized fuel-qualification standards, and a structured association mechanism for new entrant nations.

2. Coordinate allied public-private financing instruments to support a coherent allied capacity portfolio, with technology-neutral access for innovative enrichment, deconversion, and metallization technologies with the scale and structure needed to match the integrated packages offered by state-controlled competitors.

3. Adopt an explicit reference plant doctrine: first units delivered by an experienced EPC team and its associated specialist trades, with sequenced localization, and with front-end fuel supplied through an allied offtake rather than parallel national capability.

None of these actions requires a technological breakthrough. Each requires political and commercial coordination of a kind that allied governments have repeatedly demonstrated they can deliver-most recently through the Sapporo Five process itself. The opportunity is to extend that demonstration across the full front-end fuel cycle, and to do so on a timeline commensurate with the demand the West has committed to meet.