Google Signs Nuclear Energy Deal with Kairos Power

Big tech companies are increasingly turning to nuclear energy to power their massive AI data centers. On Monday, Google $GOOGL $GOOG  announced a partnership with Kairos Power , a private company developing advanced small modular reactors, or SMRs. The deal highlights strong interest from tech giants in clean energy but also shows that the economics of new nuclear technology remain uncertain—even with a deep-pocketed partner like Google.

How the Deal Works

The structure of the agreement is a bit complex:

• Power buyer: The Tennessee Valley Authority, a federally owned utility, will purchase electricity from the small Kairos reactor, which is expected to start operating by 2030.

• Google's role: Google will pay for the “clean energy attributes” of the power to supply its data centers in Tennessee and Alabama.

• Construction risk: Kairos will handle the plant’s construction, including upfront costs and any potential overruns. CEO Mike Laufer said the company will need to raise additional capital to complete the demonstration phase and move to commercial operations.

In short, Google secures a long-term supply of clean electricity, while Kairos bears the risk of building and running the plant.

What Makes These Small Reactors Special

Unlike traditional water-cooled nuclear reactors, Kairos’ SMRs use molten fluoride salt cooling. They are smaller, more flexible, and can fit distributed energy needs—ideal for data centers and other fixed loads.

The Tennessee reactor will generate 50 megawatts, just one-twentieth the size of a large nuclear plant. Kairos plans to learn from this first unit to reduce costs for future reactors and make small nuclear power more commercially viable. Google says the project will provide important lessons to expand clean, reliable power in the U.S.

Why It Matters for Investors and the Industry

Nuclear power in the U.S. has been stagnant for years, but tech companies like Google are pushing for a revival. Google isn’t new to this—last year it pre-purchased enough nuclear power from Kairos to supply up to 500 megawatts from multiple reactors.

Other companies are developing SMRs as well, and they could become competitors. A broader adoption of SMRs and regulatory acceptance would benefit the entire sector. Investors may also watch companies like Constellation Energy $CEG and Vistra , which already operate multiple nuclear plants and could capitalize on a resurgence in clean nuclear energy.

My Take

1. AI centers drive energy innovation: The enormous electricity needs of data centers are accelerating the development of advanced, efficient nuclear solutions like SMRs.

2. Risks remain: SMR technology is still at the demonstration stage. Construction and technical challenges are high, so investors should be cautious.

3. Long-term potential is huge: If the first projects succeed, the benefits could extend beyond Google to the entire data center industry and the wider U.S. energy market, making SMRs a key part of future clean energy infrastructure.

This deal is more than a power purchase for Google—it could mark the start of a commercial acceleration for U.S. nuclear energy, offering both strategic value and long-term investment opportunities.