For much of the past decade, uranium mining was not exactly a booming business.
Now the picture is changing.
As countries reconsider nuclear power in the face of concerns about climate change and energy security, the mineral at the heart of conventional nuclear reactors is attracting renewed attention.
A new global assessment by the Nuclear Energy Agency and the International Atomic Energy Agency shows that the world has more uranium than previously estimated. Identified recoverable conventional resources now stand at more than 8.1 million tonnes.
But having uranium underground is not the same as having enough uranium available when nuclear reactors need it.
That is where the story gets interesting.
A small number of countries dominate uranium production
Uranium production is concentrated in a handful of countries.
In 2024, the world produced 61,924 tonnes of uranium from mines.
Kazakhstan was by far the largest producer, accounting for 38% of global production, followed by Canada with 23% and Namibia with 12%. Uzbekistan and Australia each accounted for about 8%.
Together, the five largest producers supplied nearly 90% of the world's uranium production.
The concentration is even more striking when looking at resources.
Australia holds about 29% of identified recoverable uranium resources at the lower-cost threshold, followed by Kazakhstan with 14% and Canada with 9%. Together, the three countries hold about half of the world's identified resources at that cost level.
This concentration matters because nuclear reactors require a reliable supply of uranium fuel over many years.
Uranium does not automatically become nuclear fuel
Uranium coming out of a mine cannot simply be put into a nuclear reactor.
It must go through a series of processing and fuel-cycle steps before it can be used.
One important point from the latest assessment is that mine production is already close to, but does not completely cover, reactor requirements.
In 2024, mines produced enough uranium to meet about 96% of global reactor requirements. The remainder came from what are known as secondary supplies.
These secondary supplies include stockpiles held by governments, utilities and companies, uranium recovered from enrichment processes, recycled material from spent nuclear fuel and, historically, material derived from military inventories.
But these sources cannot necessarily be relied upon indefinitely.
The assessment says secondary supplies are expected to decline as existing inventories are drawn down. Their contribution could fall to around 4% of supply by 2040.
That puts greater emphasis back on uranium mining.
The nuclear comeback could change the equation
There are currently hundreds of commercial nuclear reactors operating around the world.
As of January 2025, the global fleet stood at 441 operating commercial reactors in 31 countries, with a combined generating capacity of about 398 gigawatts.
Those reactors generated about 2,727 terawatt-hours of electricity in 2024.
And the nuclear industry could grow significantly.
The assessment projects global installed nuclear capacity could reach between 565 gigawatts and 916 gigawatts by 2050, depending on how quickly nuclear power expands.
That would push annual uranium requirements to between about 84,800 tonnes and 143,900 tonnes a year.
In other words, the amount of uranium the world needs could rise substantially.
The problem is not simply whether uranium exists
The world may have enough uranium underground, but bringing that uranium into production takes time.
Developing a new uranium mine can take 15 to 20 years when planning, permitting and construction are taken into account.
The assessment warns that without new mine approvals and expansions, existing and committed mines could face supply shortfalls under high-demand scenarios.
That creates a race of sorts.
Countries planning to expand nuclear power need to think about fuel supply well before a reactor begins producing electricity.
Not all uranium mines are the same
The way uranium is extracted also matters.
One of the most widely used methods is in-situ leaching, or ISL. Instead of removing large quantities of rock, a solution is injected underground to dissolve uranium, which is then pumped to the surface.
ISL accounted for about 55% of global uranium production in 2024, according to the assessment.
Underground mining accounted for about 26%. It is particularly important for some of the world's very high-grade deposits, including Canada's McArthur River and Cigar Lake mines.
ISL can cause less visible surface disturbance and produces less waste rock than conventional mining. But it comes with its own environmental questions, particularly around groundwater monitoring and restoration of aquifers after mining.
So the uranium story is also an environmental story.
Africa is already part of the uranium story
Africa is not on the sidelines of this global market.
Namibia was the world's third-largest uranium producer in 2024, supplying about 12% of global mine production. Niger and South Africa also have significant identified uranium resources.
That raises questions for African countries with uranium deposits.
What happens to communities living near uranium mines?
Who benefits from the mineral?
What happens to the land and water after mining ends?
And as demand for nuclear fuel grows, how will countries balance the economic opportunities from uranium with environmental protection and the long-term management of mining sites?
The Red Book notes that the uranium industry is also dealing with the environmental and social aspects of mining, including the remediation of legacy sites.
So, is there enough uranium for the nuclear future?
For now, the answer is broadly reassuring.
The assessment says identified resources are sufficient to meet projected global requirements through 2050, even under its high-growth scenario. But that does not mean supply will automatically meet demand.
New mines have to be explored, financed, permitted and built.
Existing mines have to remain productive.
Processing and enrichment capacity have to keep pace.
And countries will have to decide how much of their future energy systems they want nuclear power to provide.
Beyond 2050, the picture becomes more complicated. Under a conventional once-through fuel cycle, continued growth in nuclear power could eventually place greater pressure on known uranium resources. The report points to continued exploration, unconventional uranium resources and technologies such as fast reactors and closed fuel cycles as possible parts of the longer-term picture.
The important point is that the nuclear conversation is no longer only about reactors.
It is also about what happens before the reactor is switched on.
