Where does uranium come from?

This page needs an unusual caution before the first number, because the production figures shown here are not uranium mining. The United States Geological Survey does not cover uranium in its Mineral Commodity Summaries, so this page uses the Energy Institute's nuclear electricity generation by country as the demand-side picture. In 2025 United States generated 826 terawatt-hours, 29% of the world's 2,845 terawatt-hours (Energy Institute), followed by China (17%), France (14%), Russia (7.7%) and South Korea (6.5%). The top five account for 74% and 79 countries generated nuclear power at all.

Mine production by country is a different list entirely, and this site links rather than republishes it: Kazakhstan is by a wide margin the largest producer, followed by Canada, Namibia, Australia and Uzbekistan, with the World Nuclear Association maintaining the authoritative series. Almost none of those countries operate large reactor fleets, and almost none of the countries in the generation table above mine meaningful quantities of uranium. That mismatch is the whole geopolitical story of the fuel.

The geology divides into three types. Sandstone-hosted roll-front deposits, the Kazakh and much of the American resource, formed where oxygenated groundwater carrying dissolved uranium hit reducing conditions and precipitated; they are low grade but can be mined by in-situ leaching without a pit. Unconformity-related deposits in Canada's Athabasca Basin are extraordinarily high grade, orders of magnitude richer than anything else, and are mined conventionally at great expense because of radiation. Namibia's are large, low-grade, open-pittable bodies.

World nuclear generation changed +1% on the previous year, with new Chinese reactors offsetting closures elsewhere.

Namibia was the largest exporter of uranium ores and concentrates (HS 261210) in 2024 with 68% of world export value, ahead of Australia (27%), on world trade of $1.6 billion (CEPII BACI). China was the largest importer with 51%.

That table covers ores and concentrates, which is only the first of four steps, and the later steps are where the real dependence lies. After mining comes conversion into uranium hexafluoride, then enrichment to raise the fissile uranium-235 content from its natural 0.7 percent to the three to five percent a power reactor needs, then fabrication into fuel assemblies. Conversion and enrichment capacity is concentrated in Russia, China, France and the United States, and Russia has historically held a large share of world enrichment services. A country can have uranium and reactors and still be dependent, because the middle of the chain is somewhere else.

The series shown is Uranium, U3O8, NUEXCO restricted spot, which was $69.23/lb in July 2026, up 17% from a year earlier (IMF PCPS). Its nominal high was $136.2/lb in June 2007, and in constant dollars the real peak was $206.2/lb in June 2007.

That is a spot price for uranium concentrate, and it describes a minority of the market. Most uranium moves under long-term contracts running three to ten years, signed between utilities and producers at prices that are usually above spot and often escalate with inflation or float within a collar. The spot market is where utilities top up and where traders and financial funds operate, and it is thin enough that a fund buying physical material can move the price meaningfully. Reading the spot price as the cost of nuclear fuel is therefore misleading in both directions.

Fuel cost is also a small share of nuclear generating cost, unlike gas or coal, because a reactor is overwhelmingly a capital expense. A doubling of the uranium price changes the cost of nuclear electricity by only a few percent, which means utilities are relatively insensitive to price and prioritize security of supply over cost. That asymmetry explains why the market can go years with prices below the cost of new mine development, and then move violently when utilities all decide to contract at once.

The other components of the fuel price, conversion, enrichment measured in separative work units, and fabrication, are assessed separately by private services. Enrichment pricing in particular became a major issue after supply from Russia came into question.

Demand is set by how many reactors are operating, which changes slowly and politically. Chinese construction has been the main source of growth, while German closures and Japanese restarts after Fukushima moved demand in both directions. A reactor life extension adds twenty years of demand at a stroke.

Utilities contract in waves, buying several years of cover at once when they perceive risk. Because most volume moves under long-term contracts, a wave of contracting tightens the market far more than the underlying consumption change would suggest, and the spot price responds sharply.

One country produces a very large share of world uranium, largely by in-situ leaching, and its national producer has repeatedly adjusted output to manage the price. Announcements of production discipline or expansion move the market immediately.

The middle of the fuel chain is more concentrated than mining. Restrictions on Russian enrichment services forced Western utilities to seek alternatives, raised enrichment prices sharply and indirectly increased uranium demand, because running enrichment plants at lower tails assays consumes more natural uranium.

For decades the market was supplied partly from stockpiles, from re-enriched tails and from down-blended weapons material under the Megatons to Megawatts programme. Those sources have largely run out, which is why mine supply now has to cover a much larger share of demand than it did in the 2000s.

Vehicles that buy and hold physical uranium remove material from the market without consuming it. Because the spot market is thin, this buying has a disproportionate price effect and has become a genuine driver rather than a curiosity.

Three Mile Island, Chernobyl and Fukushima each changed reactor construction plans for a generation. Nuclear demand is a political variable more than an economic one, and a single accident anywhere reprices the entire market's long-term outlook.

In-situ leaching, which now supplies most world production, does not involve a mine in the conventional sense. A solution of water with oxygen and either carbonate or acid is pumped through the ore-bearing sandstone via injection wells, dissolving uranium, and the pregnant solution is recovered through production wells. It is cheap, has a small surface footprint and works only where the geology is permeable and confined.

Conventional mining, used in Canada and Namibia, produces ore that is crushed, ground and leached with sulfuric acid or alkali. In both routes the uranium is recovered from solution by ion exchange or solvent extraction, precipitated, dried and packed as uranium oxide concentrate, the yellow-brown powder called yellowcake.

Yellowcake is then converted to uranium hexafluoride, a compound that becomes a gas at modest temperatures, which is the only practical form for enrichment. Enrichment uses thousands of gas centrifuges in cascade to separate the slightly lighter uranium-235 from uranium-238, raising the fissile content from 0.7 percent to typically three to five percent. The work is measured in separative work units, and the depleted residue, tails, still contains some uranium and is stored.

Enriched uranium hexafluoride is converted to uranium dioxide powder, pressed into pellets, sintered, ground to precise dimensions and loaded into zirconium alloy tubes that are assembled into fuel bundles. Those sit in a reactor for several years. Spent fuel is either stored, or reprocessed to recover uranium and plutonium, which only a few countries do.

Nuclear electricity generation is essentially the only use of any scale. A reactor converts the heat from fission into steam and then electricity, and a single large reactor produces around a gigawatt continuously, running at high capacity factors regardless of weather. That reliability is the argument for nuclear power in a decarbonising grid, and it is why several countries that had planned to phase out reactors have reversed course.

Naval propulsion is the second use: submarines and aircraft carriers use highly enriched fuel and can run for years without refuelling. Research reactors produce neutrons for materials science and, importantly, for medical isotopes; molybdenum-99, the parent of the technetium used in tens of millions of diagnostic scans a year, comes from a small number of research reactors, and shortages when they shut for maintenance are a recurring problem in nuclear medicine.

Depleted uranium, the tails left after enrichment, is extremely dense and is used for radiation shielding, aircraft counterweights and armour-piercing munitions. Uranium's historical use in ceramic glazes and glass is long discontinued.

The demand that is not yet real but shapes investment is small modular reactors. If they are deployed at scale they would raise uranium demand and, in some designs, require higher enrichment levels than today's fleet, which would require new enrichment capacity.

The chain is mine, conversion, enrichment, fabrication, reactor, and its narrow point is not the ore. Uranium is reasonably abundant and reserves are held across many countries, but conversion and enrichment are concentrated in a handful of facilities worldwide. Russia has historically supplied a large share of world enrichment services and a meaningful share of conversion, and restrictions on that supply after 2022 forced Western utilities into a scramble for alternatives that has lasted years, because building centrifuge capacity is slow and subject to non-proliferation controls.

Non-proliferation is itself a structural feature rather than a regulatory overlay. Enrichment technology is dual-use, safeguarded by the International Atomic Energy Agency, and cannot simply be bought and built. That makes the enrichment bottleneck far more durable than an ordinary industrial one.

Physical logistics are specialized but not fragile: yellowcake moves in drums in ordinary containers, uranium hexafluoride in certified cylinders, and fresh fuel assemblies by road and sea under security escort. The shipments are small in tonnage compared with any other energy commodity, which is the point: a reactor's annual fuel is a few truckloads, against trainloads of coal every day.

The genuine vulnerability is the mismatch this page opened with. Countries that generate nuclear power mostly do not mine uranium, and countries that mine it mostly do not use it. Combined with a concentrated middle of the chain, that makes nuclear fuel supply a matter of diplomacy and long-term contracting rather than of spot markets.