Small modular reactors, or SMRs, are moving from engineering theory into active construction as tech giants scramble to secure clean, reliable power for AI data centers. Unlike traditional nuclear plants that take 15 to 20 years to build and produce 1,000 to 1,500 megawatts, SMRs generate roughly 300 megawatts or less per unit, can be factory-built and shipped to site, and some developers are targeting just 24 months from site preparation to first power. The shift reflects an urgent reality: artificial intelligence is consuming electricity at rates that strain grids across the United States and Europe, and wind and solar alone cannot provide the 24/7 baseload power that hyperscalers need.

What Makes Small Modular Reactors Different from Traditional Nuclear Plants?

Traditional nuclear power plants are massive, expensive, and slow to build. SMRs flip that model by being modular, meaning you can add or remove units based on actual power needs. More importantly, many SMR designs are passively safe, relying on physics rather than active cooling systems that require power and human intervention. Several designs use liquid metal or molten salt as coolant instead of water, eliminating the need for large external water supplies. This flexibility means SMRs can be sited in deserts, landlocked industrial areas, remote communities, and military bases where traditional reactors simply cannot go.

The construction timeline difference alone is transformative. A large-scale nuclear plant might take 15 to 20 years from approval to operation, while some SMR developers are targeting 24 months from site preparation to first power. This speed matters enormously to tech companies operating on quarterly earnings cycles and multi-year infrastructure roadmaps.

Why Are Tech Giants Suddenly Investing in Nuclear Power?

The answer lies in AI's insatiable appetite for electricity. Training large language models and running the data centers that power AI services requires enormous quantities of reliable, round-the-clock power. Wind and solar, however useful, do not provide that consistency; the sun sets, the wind stops. Battery storage helps, but not enough. What hyperscalers like Microsoft, Google, Meta, and Amazon actually need is clean baseload power: electricity that flows 24 hours a day, 365 days a year, regardless of weather. Nuclear is the only clean energy source that does that, and SMRs are the version of nuclear that tech companies can actually plan around.

The corporate commitments are substantial and accelerating. Meta partnered with Oklo to develop a 1.2 gigawatt power campus in Pike County, Ohio, which will house 16 Aurora Powerhouse reactors across 206 acres, with the first phase targeting 150 megawatts operational by 2030. Meta also entered an agreement with TerraPower for up to eight of its Natrium nuclear plants. Google signed the first corporate SMR power purchase agreement in August 2025, working with Kairos Power on a project in Oak Ridge, Tennessee, that aims to scale to 500 megawatts for Google's data center operations. Amazon has options for more than 5 gigawatts of capacity from X-energy through 2039. Microsoft revived a landmark deal for 837 megawatts at Three Mile Island. NVIDIA's investment arm has backed TerraPower.

How Is the U.S. Government Supporting SMR Deployment?

Tennessee has become the epicenter of America's SMR push, combining federal funding, utility-scale ambition, and private tech sector demand in a way no other state has matched. The Tennessee Valley Authority, the largest public power provider in the United States, announced in September 2025 an agreement with ENTRA1 Energy to deploy up to six gigawatts of new nuclear power using NuScale's SMR technology, described as the largest SMR deployment program in U.S. history. The Department of Energy subsequently selected TVA for $400 million in federal funding to advance deployment of a GE Vernova Hitachi BWRX-300 at the Clinch River Nuclear site in Tennessee. Google's Kairos Power agreement, which will supply power to the TVA system, is also based in Oak Ridge, Tennessee.

What Are the Key Players and Their Competitive Positions?

Several companies are racing to capture market share in this emerging sector, each with distinct advantages and challenges:

• Oklo (OKLO): Backed by Sam Altman, CEO of OpenAI, Oklo is developing the Aurora fast reactor, a compact, liquid-metal-cooled design that can run on recycled nuclear fuel. Its customer pipeline exceeds 14 gigawatts, including the Meta deal, a master agreement with Switch for up to 12 gigawatts, and a 500 megawatt deal with Equinix. Oklo expects commercial operations to begin between late 2027 and early 2028.
• NuScale Power (SMR): NuScale has a critical competitive advantage: it is the only company in the world with an NRC-certified SMR design. Its 77 megawatt electric Power Module received Standard Design Approval in May 2025. The TVA/ENTRA1 deployment agreement covers up to 6 gigawatts of NuScale capacity, with the first reactor expected online by 2030.
• Other Major Players: TerraPower, Kairos Power, X-energy, and GE Vernova Hitachi are all advancing competing designs with backing from major tech companies and federal funding.

The stock performance reflects both the genuine opportunity and the volatility of betting on emerging technology. Oklo's stock has fallen around 11 percent year-to-date in 2026, which some analysts view as a buying opportunity given the pipeline. NuScale Power has been more volatile, down nearly 27 percent year-to-date, largely due to weak recent revenue numbers, though analysts point out that no revenue yet is expected at this stage of development.

What Should Investors and Industry Observers Know About SMR Risks?

The sector is real, the technology is advancing, and the demand is genuine. But the stocks are volatile, the revenues are mostly still in the future, and the risks are significant. Most of these companies have not yet delivered commercial power to the grid. Construction timelines, regulatory approvals, and supply chain challenges could all delay projects. The first operational SMRs will be a critical test of whether the technology can deliver on its promises of speed, cost-effectiveness, and safety. If early projects succeed, the market could expand rapidly. If they stumble, investor confidence could evaporate.

What is clear is that the convergence of AI's power demands, climate imperatives, and technological maturation has created a genuine moment for nuclear energy to reshape its image. The branding problem that has haunted nuclear for decades may finally be shifting, not because of marketing, but because the alternative, to tech companies and grid operators alike, is increasingly untenable.