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By 2026, AI-driven data centers are projected to consume 1,000 TWh of electricity globally — roughly equivalent to Japan's entire power demand. Facing grid bottlenecks and a 49 GW shortfall in the U.S. alone by 2028, tech giants like Microsoft, Google, and Amazon are pivoting from passive consumers to billion-dollar investors in nuclear energy, including reactivating Three Mile Island, signing small modular reactor deals, and acquiring dedicated nuclear sites. This report analyzes how the AI-energy nexus is reshaping electricity markets, driving a nuclear renaissance, and creating new geopolitical dependencies around energy infrastructure and compute capacity.
The AI Energy Crisis: A 1,000 TWh Problem
According to the International Energy Agency's (IEA) March 2026 Energy Technology Perspectives report, global data center electricity consumption has reached a critical inflection point. AI workloads — built on dense GPU clusters that can draw as much power as 100,000 homes per facility — are the primary driver. The IEA's Electricity 2026 report, published February 6, 2026, confirms that data center power demand is forecast to more than double by 2030, surpassing 945 TWh. In the U.S., which hosts 33% of global data centers, consumption is expected to rise from 200 TWh in 2022 to 260 TWh by 2026, with AI workloads accounting for the majority of growth.
The global AI energy crisis is not just a numbers game. Morgan Stanley Research, in a February 27, 2026 analysis, warns that U.S. data centers will require 74 GW of power by 2028, but only 25 GW of capacity is currently accessible — creating a 49 GW shortfall that threatens AI infrastructure expansion. Equipment costs have risen 30% since 2019, with transformer lead times stretching from 12 to 36+ months. The power gap is already impacting consumers: residential rates in central Ohio jumped 60% (from 11-12¢/kWh in 2020 to 19¢ in 2025), and national retail electricity prices have risen 42% since 2019.
Big Tech's Nuclear Pivot: From PPAs to Plant Ownership
Tech giants are no longer content with purchasing renewable energy certificates. They are becoming direct investors in nuclear infrastructure, securing dedicated, behind-the-meter power for their hyperscale data centers.
Microsoft: Restarting Three Mile Island
In a landmark deal announced in September 2024 and moving forward through 2026, Microsoft signed a 20-year power purchase agreement with Constellation Energy to restart Unit 1 of the Three Mile Island Nuclear Generating Station in Pennsylvania. The site — renamed the Crane Clean Energy Center — sits alongside the infamous Unit 2, which suffered a partial meltdown in 1979. Unit 1 operated safely for decades until economic pressures from cheap natural gas forced its closure in 2019. The restart, targeting operations by 2027 or 2028, involves a $1.6 billion investment and is supported by federal tax credits from the Inflation Reduction Act worth an estimated $100 million annually. Microsoft has also signed a power purchase agreement with fusion developer Helion Energy, signaling a diversified approach to next-generation nuclear.
Amazon: Acquiring Nuclear Sites and SMR Partnerships
Amazon Web Services (AWS) has taken nuclear procurement to a new scale. In June 2025, AWS signed a 1,920 MW power purchase agreement with Talen Energy from the Susquehanna nuclear plant in Pennsylvania — the largest corporate nuclear deal to date. The 17-year contract, running through 2042, is expected to generate approximately $18 billion in revenue for Talen. Amazon also acquired the Cumulus Data Center campus for direct behind-the-meter power from Susquehanna. Additionally, Amazon is investing in small modular reactors (SMRs) through partnerships with Energy Northwest and X-energy, which plans to add 300 MW of nuclear capacity in the Pacific Northwest and Virginia. Amazon separately announced plans to spend $20 billion on data centers in Pennsylvania alone.
Google: First Corporate SMR Agreement
In October 2024, Google signed the world's first corporate agreement to purchase nuclear energy from multiple small modular reactors developed by Kairos Power. The Master Plant Development Agreement aims to deploy up to 500 MWe of carbon-free electricity by 2035. The first project, Hermes 2 in Oak Ridge, Tennessee, will deliver up to 50 MWe to the Tennessee Valley Authority grid starting in 2030, powering Google data centers in Tennessee and Alabama. In August 2025, TVA, Google, and Kairos Power signed a binding agreement — the first ever for a U.S. advanced reactor — marking a significant milestone in the commercialization of SMRs.
The Nuclear Renaissance: 15 Reactors Coming Online in 2026
After a weak 2025 where global nuclear capacity declined by 1.1 GW, the nuclear industry is poised for a rebound in 2026. BloombergNEF expects about 15 reactors to come online globally, adding nearly 12 GW of new capacity. Key developments include the planned restart of Michigan's Palisades plant (the first U.S. reactor to return from decommissioning), strong U.S. policy backing targeting 400 GW of nuclear capacity by 2050, and Department of Energy cost-shared funding for SMR deployments. China continues to lead global expansion with 10 new approved reactors and is forecast to become the world's largest nuclear market by 2030.
The nuclear renaissance and AI data centers are now deeply intertwined. As of May 2026, 66 companies across 15 countries are actively building the SMR and advanced nuclear industry. NuScale Power remains the only company with full NRC design certification; Oklo is the largest SMR pure-play by market cap; TerraPower broke ground on the first U.S. advanced reactor in Wyoming; and Kairos Power holds the first NRC construction permit for an advanced reactor.
Grid Bottlenecks and Geopolitical Implications
The IEA warns that grid capacity — not chips — is the primary bottleneck for AI and data center growth. Up to 20% of planned global data center projects face delays due to grid constraints, including multi-year interconnection backlogs and supply chain bottlenecks. The geopolitics of AI energy infrastructure are shifting: countries with abundant nuclear capacity, uranium reserves, or advanced reactor manufacturing capabilities may gain strategic advantages in the AI race.
Morgan Stanley projects that hyperscaler companies will spend over $1 trillion combined in 2025-2026 on AI infrastructure, with energy infrastructure absorbing a growing share. Power prices are expected to remain elevated, potentially becoming a political issue around U.S. midterm elections. The expansion in profit margins could create $350 billion in value through the power supply chain, but also raises concerns about the burden on residential ratepayers.
Expert Perspectives
"AI computing demand represents the most important technological shift in modern history," said Stephen Byrd, lead analyst at Morgan Stanley, in the firm's February 2026 report. "Electricity supply is emerging as a defining competitive factor — companies that secure reliable energy first may hold the strongest advantage in scaling artificial intelligence."
"The restart of Three Mile Island is a powerful symbol of how far we've come," noted a senior energy analyst at BloombergNEF. "Nuclear power's high capacity factors (over 90%), continuous output, and minimal emissions make it ideal for AI workloads that require stable baseload power."
FAQ
Why are tech companies investing in nuclear power for AI?
AI data centers require massive, continuous, and reliable electricity — 300-500 MW per facility. Nuclear power provides 24/7 carbon-free baseload electricity with over 90% capacity factors, unlike intermittent renewables. Grid constraints and long interconnection queues make behind-the-meter nuclear deals increasingly attractive.
What is the 49 GW shortfall in U.S. data center power?
Morgan Stanley projects U.S. data centers will need 74 GW by 2028, but only 25 GW is currently accessible, creating a 49 GW gap. This shortfall threatens AI infrastructure expansion and is driving tech companies to secure dedicated power sources.
How much electricity will AI data centers consume by 2026?
Global data center electricity consumption is projected to reach 1,000 TWh by 2026, roughly equivalent to Japan's entire power demand. AI workloads are the primary driver of this growth.
What are small modular reactors (SMRs)?
SMRs are nuclear fission reactors with electrical output under 300 MW, designed for factory fabrication and modular deployment. They offer lower upfront costs, passive safety features, and scalability. Google, Amazon, and Microsoft are investing in SMR development for data center power.
Is the Three Mile Island restart safe?
Unit 1, which is being restarted, operated safely for decades until its 2019 closure and is a different reactor from the Unit 2 that suffered the 1979 accident. The restart requires approval from the Nuclear Regulatory Commission and involves $1.6 billion in upgrades. Federal tax credits from the Inflation Reduction Act are critical to the project's viability.
Conclusion: The Nuclear Bargain Takes Shape
The AI boom has created an unprecedented demand for reliable, carbon-free electricity, and nuclear power is emerging as the preferred solution for hyperscale data centers. The deals signed by Microsoft, Google, and Amazon in 2024-2026 represent a structural shift in energy markets: tech companies are becoming major players in electricity generation, not just consumers. The nuclear renaissance is no longer a speculative trend — it is a concrete market reality driven by the insatiable energy appetite of artificial intelligence. As the IEA's March 2026 report confirms, the AI-energy nexus will continue to reshape global electricity markets, create new geopolitical dependencies, and define the competitive landscape of the digital age.
Sources
- IEA, Energy Technology Perspectives 2026 and Electricity 2026, March and February 2026.
- Morgan Stanley Research, Powering AI: Energy Market Outlook 2026, February 27, 2026.
- BloombergNEF, Nuclear Power Outlook 2026.
- Forbes, Why Microsoft and Amazon Are Turning to Nuclear Power for AI, February 19, 2026.
- TechCrunch, Amazon Joins the Big Nuclear Party, Buying 1.92 GW for AWS, June 13, 2025.
- Utility Dive, Talen-AWS Susquehanna Nuclear Data Center Deal, 2025.
- Google Blog, Google-Kairos Power Nuclear Energy Agreement, October 2024.
- MIT Technology Review, Three Mile Island Restart for Microsoft, September 2024.
- Bloomberg, Three Mile Island Restart Moves Ahead with Microsoft AI Deal, May 2026.
- NPR, Three Mile Island Nuclear Power Plant Will Reopen for Microsoft, September 2024.
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