Nuclear Power
The generation of electricity through nuclear fission; a growing source of demand for uranium as AI data centers and broader electrification drive interest in reliable, low-carbon power.
Covered in 1 MetalsCost.com News Intelligence article, most recently on August 24, 2026.
Overview
Nuclear power is the business of running fission reactors to generate electricity at utility scale, and it occupies an unusual position in the power industry: plants are enormously expensive and slow to build, but once running they can operate for 40 to 60 years or more, often outlasting several generations of the coal or gas plants built around the same time. The United States operates the world's largest fleet of commercial reactors, though France remains the country most reliant on nuclear as a share of its own electricity mix. After a long stretch of relatively flat growth following the 2011 Fukushima accident, the sector has seen renewed momentum recently, plant life-extensions, the restart of previously shuttered reactors, and a wave of interest in smaller, factory-built reactor designs are all part of a broader reassessment of nuclear's role as electricity demand climbs faster than it has in decades.
Key Metals & Materials Used
A reactor's fuel core relies on enriched uranium formed into ceramic pellets and sealed inside tubes made from a zirconium alloy, a metal chosen specifically because it lets neutrons pass through largely undisturbed, allowing the fission chain reaction to proceed efficiently inside the core. The reactor pressure vessel and containment structure are built from thick, specially certified steel, engineered to standards well beyond those of ordinary industrial steel given what they're designed to contain. Outside the reactor core itself, a nuclear plant is, in metal terms, much like any other large power station, copper-wound generators and transformers, steel structural framing, and extensive cabling, but built to a nuclear facility's higher standard of redundancy and inspection. Emerging small modular reactor designs are pushing demand for some of these same materials in a different form, since factory-built modules require different fabrication approaches than a traditional site-built plant.
How the Industry Operates
A nuclear plant runs on a fuel cycle measured in years rather than the days or hours relevant to a coal or gas plant: once loaded, a reactor core typically runs for 18 to 24 months between refueling outages, during which a portion of the fuel assemblies are swapped for fresh ones while the plant is offline. Between refuelings, the plant runs close to full output around the clock, nuclear plants typically post among the highest capacity factors of any power-generation technology, since there's little reason to throttle output once a reactor is running and fuel costs are a small share of total generation cost compared to a gas plant's fuel bill. Plant operators work under intensive regulatory oversight throughout a reactor's operating life, with periodic safety inspections and a formal relicensing process required to extend operations beyond a plant's original design life, which utilities increasingly pursue given how expensive it is to build a replacement from scratch.
Byproducts & Waste Streams
Used fuel assemblies, still highly radioactive when removed from the reactor, are the industry's defining waste product, typically cooled in on-site storage pools for several years before being moved into dry cask storage for longer-term containment while national governments continue working toward permanent underground repositories. Unlike a fossil-fuel plant, a nuclear plant produces no combustion byproducts or greenhouse gas emissions during operation, which is a major part of its current appeal as electricity demand grows and grid operators look for low-carbon sources that can run continuously. Decommissioning a retired plant is a major undertaking in its own right, involving the careful removal and disposal of activated reactor components over a process that can span a decade or more. Low-level radioactive waste, contaminated protective equipment, tools and filters used during routine operation, is generated continuously and managed separately from spent fuel, typically disposed of at licensed low-level waste facilities.
Who It Serves
Electric utilities operate nuclear plants and sell the power into regional grids, where it's dispatched alongside gas, coal, wind, solar and hydro generation to meet real-time demand. Because nuclear output is so steady, grid operators lean on it to provide reliable baseload capacity that doesn't fluctuate with weather the way renewable generation does. A newer and fast-growing customer category is large technology companies, which have begun signing long-term power agreements directly with nuclear plant operators, including deals to restart previously closed reactors, specifically to secure the reliable, round-the-clock, low-carbon electricity that power-hungry AI data centers need. Industrial customers with continuous, high-volume power needs, such as large manufacturing or chemical facilities, also benefit from the price stability nuclear generation can offer compared to fuel-price-sensitive gas generation.
Role in Everyday Life
Nuclear power quietly supplies a meaningful share of the electricity behind everyday activities, running a refrigerator, charging a phone, keeping hospital equipment on, without most people ever registering which power plant is actually behind the electrons reaching their outlet. Its biggest practical impact on ordinary life shows up indirectly, through grid reliability: because nuclear plants keep running regardless of weather, they reduce the odds of the kind of supply shortfall that leads to blackouts or price spikes during periods of unusually high demand, like a heatwave. More recently, the same steady, round-the-clock nature that makes nuclear power valuable to a household is drawing a new kind of attention, as AI data centers and their enormous, continuous electricity appetite make plants that never really switch off newly attractive to power buyers who previously paid little attention to where their electricity actually came from.
