The Nuclear-AI Connection

In 2024–2025, every major AI infrastructure investor - Microsoft, Google, Amazon, and Meta - announced deals to power their data centers with nuclear energy. This was not a coincidence or a PR strategy. It reflects a genuine constraint: AI's power demands are outpacing the grid's ability to deliver clean, reliable energy at the required scale.

Why Nuclear for AI?

AI data centers require power that meets three criteria simultaneously, which no other source does as well as nuclear:

• 24/7 availability - AI inference runs continuously. Solar and wind are intermittent. Battery backup at 100MW+ scale for 24+ hours is currently not economically viable. Nuclear generates power continuously regardless of weather.
• Massive scale - a single nuclear plant generates 1,000–1,500 MW continuously. To match this with solar requires a 5,000+ MW solar farm plus months of battery storage. The land and supply chain requirements are vastly larger.
• Carbon-free - hyperscalers have committed to carbon-free energy targets. Nuclear is the only scalable 24/7 zero-carbon power source currently available at gigawatt scale.
• Grid-independent - a dedicated nuclear supply agreement gives data centers predictable power costs and supply, independent of grid capacity constraints in the local area.

Major Deals (2024–2025)

• Microsoft + Three Mile Island - Microsoft signed a 20-year power purchase agreement with Constellation Energy to restart Unit 1 of Three Mile Island (which was shut down in 2019 for economic reasons, not safety). The restarted plant (renamed "Crane Clean Energy Center") provides approximately 835 MW to the PJM grid, with Microsoft purchasing a portion for its data centers.
• Google + Kairos Power - Google signed an agreement to purchase power from Kairos Power's small modular reactors (SMRs) when they come online, starting ~2030. First agreement of this scale for SMR technology.
• Amazon + Talen Energy - Amazon purchased a data center campus directly adjacent to the Susquehanna Nuclear Station in Pennsylvania - enabling a direct on-site power connection bypassing the public grid entirely.
• Meta + Nuclear procurement - Meta issued an RFP specifically for nuclear power for its US data centers, signaling intent to procure significant nuclear capacity.
• Microsoft + OpenAI + Stargate - Stargate, the $500B US AI infrastructure initiative announced in early 2025, includes nuclear power as a planned energy source for its compute facilities.

Small Modular Reactors (SMRs) - The Future Option

Traditional nuclear plants take 10–15 years and $10–20B to build. SMRs are designed to be smaller (50–300 MW vs 1,000+ MW), factory-manufactured, and faster to deploy:

• NuScale (US) - the only SMR design to receive NRC design certification (2022); however, their first commercial project was cancelled in late 2023 over cost escalation.
• X-energy (US) - high-temperature gas-cooled SMR; received Department of Energy funding; backed by Amazon.
• Kairos Power (US) - fluoride salt-cooled high-temperature reactor; Google's partner; first unit targeting ~2030.
• TerraPower (US) - Bill Gates-backed sodium fast reactor; Natrium design; 345 MW; first unit under construction in Wyoming.
• EDF (France) - advanced EPR2 reactor; France plans 6 new units by 2040.

SMRs remain largely unproven at commercial scale. Most are not expected to deliver power before 2030–2035. The nuclear deals currently online (like Three Mile Island) involve existing plants, not new SMR construction.

Constraints and Criticism

• Timeline - new nuclear construction is a decade-long endeavor. AI power needs are growing now. Nuclear can address the 2030–2040 problem, not the immediate 2025–2027 gap.
• Cost - nuclear power purchase agreements are priced significantly above current wholesale electricity prices. AI companies can afford this; it will raise costs for other electricity consumers if it redirects capacity from the shared grid.
• Grid privatization concern - direct data center–nuclear plant connections bypass the shared public grid. Critics argue this is effectively privatizing public power infrastructure and raises questions about electricity access and pricing for other consumers.
• NIMBY and permitting - new nuclear plants face local opposition and regulatory timelines of 10+ years in most jurisdictions regardless of the technology.