Nuclear power's fuel chain: uranium, enrichment, and the race to new reactors

What it is

The nuclear & uranium beat tracks the industrial chain that fuels the world's 417 operating power reactors. The chain has four links: uranium mining (ore processed to yellowcake, U3O8), conversion (to uranium hexafluoride, UF6), enrichment (centrifuge cascades raise the fissile U-235 fraction from 0.72% to 3-20%), and fuel fabrication. The enrichment step is structurally dual-use: the same centrifuges that produce reactor fuel can, with additional run-time, produce weapons-grade material above 90% U-235. Five roster subjects define the beat: Uranium (the commodity), Enrichment (the dual-use chokepoint), SMRs (next-generation reactor designs reshaping demand), Kazatomprom (the world's dominant miner), and Rosatom (the world's dominant enricher and reactor builder). Together they determine energy security for dozens of countries and set the effective ceiling on nuclear proliferation risk.

History

Uranium mining industrialized under the US Manhattan Project beginning in 1942. Commercial nuclear power expanded through the 1960s and 1970s, with reactor orders peaking at more than 200 units in a single decade. Three accidents reset the industry: Three Mile Island in the US (March 1979), Chernobyl in the Soviet Union (April 1986), and Fukushima Daiichi in Japan (March 2011). Western orders collapsed and uranium spot fell from a peak near US$136/lb in June 2007 to roughly US$20/lb by 2017. Russia's Rosatom and Kazakhstan's Kazatomprom built market share through the trough: Rosatom because Western enrichment investment withered, Kazatomprom because its low-cost in-situ recovery (ISR) fields kept producing through every price cycle. The 1968 Nuclear Non-Proliferation Treaty established IAEA safeguards as the legal architecture for civilian enrichment; the 1997 Additional Protocol extended IAEA access to undeclared sites, following the discovery of Iraq's clandestine program in 1991. Recovery began after the 2015 Paris Agreement and accelerated when Russia's 2022 invasion of Ukraine exposed Western utility dependence on Russian enrichment.

Current state

As of mid-2026, 417 reactors across 31 countries generate roughly 380 GWe; 63 more are under construction, concentrated in China, India, and South Korea. Annual uranium demand runs near 67,000-69,000 tonnes U, above current mine supply, sustaining a structural deficit. Uranium spot held near US$86/lb U3O8 in mid-2026, below the 2024 peak near US$107. Rosatom holds roughly 44% of global separative work unit (SWU) enrichment capacity, a dependence that Western utilities are racing to break: the US Department of Energy committed US$2.7 billion in enrichment task orders in early 2026, before Russian import waivers lapse in January 2028. SMR designs including TerraPower's Natrium and Rolls-Royce's 470 MWe unit need high-assay low-enriched uranium (HALEU, 5-20%), which only Rosatom and China produce commercially. Kazatomprom guided 2026 production to 27,500-29,000 tonnes U on a 100% basis, explicitly gated on sulphuric-acid supply. Iran's 60% enriched stockpile at Isfahan, blocked from IAEA inspection since June 2025, is the live proliferation thread.

Relationships

The five tracked subjects form a supply chain and a geopolitical contest. Kazatomprom, producing roughly 39% of world uranium mine output from Kazakhstan's ISR fields, is the market's swing supplier: its annual guidance moves spot prices and routes volumes through both Western logistics and Rosatom-linked channels. Rosatom converts uranium into fuel for a foreign reactor fleet operating or under construction across Egypt, Turkey, Bangladesh, Hungary, and Finland, and holds legacy enrichment contracts with European and US utilities. SMR developers depend on enrichment supply for HALEU; the HALEU gap currently ties developers to Rosatom or an as-yet unbuilt US cascade (see AI電力需要でSMR受注残が膨張、オクロ・スイッチ12GW、ロールス・ロイスがスウェーデンを獲得). Iran's enrichment at 60% is the live stress test of whether IAEA safeguards can contain a state-level program pushing toward a weapons breakout threshold (see バンスはイランがIAEA査察官に同意したと言い、テヘランは否定した and 戦後、査察官の目から消えたイランの濃縮ウラン).

What to watch

• Whether Kazatomprom's 2026 production guidance holds or is cut mid-year on sulphuric-acid supply, as it was in 2025 (see カザトムプロム、2026年の生産量を9%増と見通すも、硫酸供給を条件に上限設定).
• Whether US DOE enrichment task orders yield operating SWU capacity before Russian import waivers lapse in January 2028 (see [[us-enrichment-deRussification-2026]]).
• Whether IAEA inspectors regain access to Iran's Fordow, Natanz, and Isfahan enrichment facilities before the post-ceasefire verification window closes (see グロッシ、IAEAはイランの施設に戻ると表明、ただし時期は『必須ではない』 and IAEAとイランが核査察官の帰還時期をめぐり対立).
• Whether uranium spot breaks above the current plateau as the structural supply deficit widens (see ウラン価格、構造的な供給不足が積み上がる中86ドル近辺で横ばい).
• Which Western SMR design reaches commercial operation first and whether HALEU supply proves the binding constraint on the new wave of data-centre and grid orders.