Google and Constellation Energy entered a 20-year power purchase agreement on October 6, 2026, to supply 890 megawatts of nuclear energy to the PJM Interconnection grid. Constellation plans to invest over $4.3 billion to modernize existing reactor units rather than constructing new facilities, as reported by the news outlet it-daily.net.
Modernizing Reactor Fleets in Illinois, Pennsylvania, and New Jersey
Constellation Energy, the largest operator of nuclear power plants in the United States, is shifting its strategy from new construction to the life extension and performance enhancement of its current fleet. The $4.3 billion investment targets eleven existing reactor blocks located across Illinois, Pennsylvania, and New Jersey. By upgrading these facilities, the operator aims to increase their total output, with the first capacity increases expected to reach the grid by 2028. The long-term nature of the contract with Google provides the financial stability required for these capital-intensive plant modernizations.
Expanding Energy Supply and Google Cloud Integration
The energy partnership extends beyond the initial 890-megawatt commitment. The two companies also signed a 15-year supply agreement for an additional 2.7 gigawatts, bringing the total capacity involved in the deal to 3,590 megawatts. Alongside the power procurement, Google and Constellation established a five-year technology agreement. Under this arrangement, Constellation will integrate Google Cloud and Gemini Enterprise tools to assist with site selection, power flow modeling, equipment monitoring, and the security of its operational networks. Following the public disclosure of these agreements, Constellation Energy’s stock price rose by approximately 12 percent.
Growing Power Demands for Data Centers
The partnership follows a documented rise in Google’s electricity consumption. According to the company’s 2026 environmental report, its power demand increased by 37 percent in 2025 compared to the previous year. To address this, Google has pursued multiple nuclear energy contracts to power its infrastructure. In 2025, the company reached an agreement with NextEra Energy to restart the decommissioned Duane Arnold nuclear plant in Iowa, which provides 615 megawatts. Google is also working with Kairos Power to develop a fleet of advanced small modular reactors with a capacity of up to 500 megawatts by 2035.
Industry Trends in Nuclear Power Procurement
Constellation Energy has recently secured several high-profile contracts with major technology firms to support the energy needs of data centers. In addition to the Google agreement, the company finalized a contract with Amazon for the Calvert Cliffs nuclear plant in Maryland. Constellation is also involved in the restart of a reactor unit at the Three Mile Island facility in Pennsylvania, which is slated to supply power to Microsoft.
Why Constellation Energy Uses Google Cloud and Gemini AI
Why is Constellation Energy focusing on existing reactors instead of building new ones? The multi-billion dollar investment is supported by long-term purchase commitments from technology companies, which guarantee revenue for the infrastructure improvements.
What is the role of Google Cloud in the energy agreement?
Constellation will use Google’s cloud computing and Gemini AI services to improve operational efficiency. These tools are designated for modeling electricity distribution, monitoring the health of nuclear plant equipment, and strengthening the cybersecurity of the utility’s operational networks.
How much total power is Google securing through these nuclear agreements?
The recent agreement with Constellation covers up to 3,590 megawatts. When combined with other initiatives, such as the 615-megawatt Duane Arnold plant restart and the 500-megawatt Kairos Power project, these efforts represent a significant portion of Google’s strategy to meet its growing energy needs through carbon-free nuclear power.
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