What's happening
Kairos Power commenced construction on its Hermes 2 Demonstration Plant on April 17, 2026, a 50 MW Generation IV fluoride salt-cooled reactor located in Oak Ridge, Tennessee. The facility represents the first concrete delivery under the company's master plant development agreement with Google to deploy a 500 MW advanced reactor fleet by 2035. Hermes 2 will supply up to 50 MW of carbon-free electricity to the Tennessee Valley Authority grid, specifically powering Google data centers across Tennessee and Alabama through a first-of-a-kind power purchase agreement between TVA and Kairos Power. The project follows Hermes 1, whose construction began in 2025 with operations expected in 2028, while Hermes 2 targets operational status by 2030. Kairos Power has invested over $100 million in its Oak Ridge facility and expects to create more than 55 jobs, with Barnard Construction Company handling the construction work.
Why it matters for markets
The groundbreaking establishes a concrete timeline for Google's ambitious nuclear strategy to secure 500 MW of advanced reactor capacity by 2035, addressing the massive power demands from AI workloads that are straining traditional grid infrastructure. With Google's market capitalization at $4.06 trillion and annual revenue of $402.84 billion, the company's commitment to factory-built nuclear reactors signals a fundamental shift in how hyperscale technology companies approach energy procurement for data center operations. The 50 MW Hermes 2 facility, while modest compared to traditional gigawatt-scale nuclear plants, represents a scalable model that could be replicated across Google's data center footprint. Kairos Power's over $100 million investment in Oak Ridge demonstrates the capital intensity required to commercialize Generation IV reactor technology, with implications for investors evaluating the advanced nuclear sector's path to profitability.
Sectors and assets to watch
Advanced nuclear reactor developers stand to benefit from validation of the factory-built small modular reactor model, particularly companies pursuing Generation IV technologies that promise enhanced safety profiles and reduced construction timelines compared to traditional nuclear plants. Data center operators and cloud computing providers face mounting pressure to secure carbon-free baseload power as AI workloads drive exponential growth in electricity consumption, making nuclear partnerships increasingly attractive despite higher upfront costs. Electric utilities like TVA that can accommodate advanced reactor deployments may gain competitive advantages in attracting hyperscale technology customers, while traditional renewable energy providers could face intensified competition from nuclear's 24/7 availability profile.
What to watch next
Monitor Hermes 1's operational performance when it comes online in 2028, as successful demonstration will validate Kairos Power's reactor design and manufacturing approach for the broader 500 MW Google deployment. Track additional power purchase agreements between TVA and technology companies, signaling whether the Hermes 2 model can scale across the Southeast's data center corridor. Watch for similar nuclear partnerships from other hyperscale operators like Microsoft, Amazon, and Meta as AI infrastructure demands continue accelerating beyond traditional renewable energy capacity.