IEA warns uranium supply must scale sharply to support nuclear's 30-year capacity peak
Kazakhstan and Russia control the bulk of global uranium supply, leaving the nuclear build exposed as demand accelerates to its strongest pipeline in decades.
The International Energy Agency said on Thursday (2026-07-16) that rapid expansion in global nuclear capacity will require substantial new investment in uranium supply, warning that the market is likely to remain tight as demand climbs. The agency described maintaining adequate uranium supply as one of the central challenges to nuclear's enlarged role in the energy mix.7
The IEA expects more than 70 GW of new nuclear capacity to come online by the mid-2030s, which it describes as one of the strongest construction pipelines in 30 years. Tripling capacity by 2050 would require roughly $900 billion in additional capital spending, the agency estimates, with world nuclear capacity potentially rising more than 50% from 2025 levels over that period. Supply investment has not tracked those ambitions.2,1
Production is concentrated at the top. Five nations account for almost 90% of global uranium output, with Kazakhstan and Canada providing the core of low-cost, high-grade material. That concentration hands both countries — and their operational and political conditions — disproportionate influence over a market with few credible alternatives at scale.4
Russia compounds the problem on the conversion side. It controls roughly half of global uranium-conversion capacity, and EU member states sourced about 15% of their natural uranium from Russia in 2024, according to IEA figures. Rebuilding those supply chains takes years, as western efforts to reduce reliance on Russian nuclear fuel services have shown; the infrastructure cannot be replicated quickly regardless of political will.2,5
Interest in new sources is growing but constrained by timelines. As confidence in Kazakh political stability has softened, buyers have directed more attention toward Saskatchewan, which ranked third globally for mining investment attractiveness in the Fraser Institute's February 2026 annual survey. New Canadian mines, though, carry multiyear development schedules that leave near-term supply gaps open.3
Cameco, which mined roughly 15% of the world's uranium in 2025, sits behind Kazakhstan's state-owned Kazatomprom as the second-largest global supplier. The company has secured long-term contracts stretching years ahead, limiting spot-market exposure for its committed customers. Citi analysts, cited by Yahoo Finance, expected spot uranium prices to reach $125 per pound this year, reflecting demand growth outrunning available supply.6,1
Advanced reactor designs add a separate supply-chain stress. Many small modular reactor concepts require high-assay low-enriched uranium, known as HALEU, which is not yet commercially available outside Russia. That dependency sits inside the segment of the nuclear market most reliant on Western technology and government investment, creating a fuel vulnerability that has received less attention than reactor financing.5
European utilities face both ends of this risk at once: conversion dependency on Russia, and reactor cost inflation that makes further delay expensive. France's Flamanville-3 finished roughly €10 billion over budget and 12 years behind schedule. Nuclear projects globally average cost overruns of around 100% and an additional $1.5 billion per facility, according to data cited by Forbes. That record shapes how investors price delivery risk in a build-out that depends on the supply chain moving faster than it historically has.2
The uranium ETF URA closed at $38.73 as of Friday's close (2026-07-18), down 0.74% on the session. Equity pricing and physical uranium markets move differently; spot uranium trades infrequently and utilities that deferred long-term contracting now compete with a wider buyer base for material that, on the IEA's own timeline, cannot be expanded quickly. Which utilities hold long-term contracts and which remain exposed to spot is the supply-side fault line the agency's Thursday (2026-07-16) assessment put back in the open.