Why Every Major Tech Company Is Betting Billions on Nuclear Energy

Microsoft signed a deal to restart Three Mile Island. Google contracted for power from small modular reactors not yet built. Amazon acquired a nuclear-powered data center campus. In the span of eighteen months, nuclear energy has gone from a declining, politically toxic industry to the hottest infrastructure investment in America — and artificial intelligence is the reason.

Training a single large language model consumes roughly the same amount of electricity as 100 American homes use in a year. Running that model at scale, serving millions of queries per day, multiplies that by orders of magnitude. And the demand is growing. By 2026, AI data centers are projected to consume more electricity than some medium-sized countries.

Renewable energy — solar and wind — can't reliably meet this demand. Both are intermittent: the sun doesn't always shine, the wind doesn't always blow. Data centers can't go offline when clouds roll in. They need power that is consistent, predictable, and available 24 hours a day, 365 days a year. Nuclear provides exactly that.

The technology that's attracted the most interest from tech companies is small modular reactors, or SMRs. Unlike conventional nuclear plants that take decades and billions of dollars to build, SMRs are designed to be manufactured in factories and assembled on-site. The construction timeline is measured in years, not decades. The cost per unit is lower, and the technology can be deployed close to where the power is needed.

Several companies are in advanced development. NuScale has regulatory approval for its design. X-energy is building manufacturing capability. Kairos Power, which has a contract with Google, is targeting first power delivery in 2030. The tech companies aren't just buying power — several are making direct equity investments, essentially betting that nuclear energy is about to become a major industry again.

The irony is rich. Nuclear power spent the past thirty years in decline, driven out by economics and public fear following Chernobyl and Fukushima. Now the same technology companies that promised to save the planet with clean energy are turning to the most controversial clean energy source of all, because it's the only one that can meet their needs.