TerraPower Announces Plans for Data Center Project Powered by Nuclear Energy

Nuclear power startup TerraPower, founded by Bill Gates, is poised to unveil its first data center project this year. This move aims to address the energy demands of AI data centers, which require consistent power availability. While the specific client for this project has not been disclosed, TerraPower previously announced in January a partnership with Meta to provide eight Natrium power plants.

The upcoming data center, expected to break ground in 2027, will mark TerraPower’s second power plant, following the construction of its first facility in Wyoming.

TerraPower possesses a unique advantage in the nuclear sector with its advanced energy storage solutions, making it well-suited for the challenges faced by data centers. Nuclear reactors operate efficiently when running at full capacity, achieving a capacity factor of 92.5% in the U.S. However, traditional reactors are slow to adjust their output, increasing or decreasing by only about 5% per minute. In contrast, new small modular reactors (SMRs) can respond more rapidly, adjusting by roughly 10% of their rated output per minute, according to the National Laboratory of the Rockies.

Despite these improvements, operate at reduced capacity poses financial risks due to the high capital expenditures associated with nuclear technology. Startups like TerraPower are hopeful that mass production of SMRs will eventually lower these costs, although such benefits could take a decade or longer to materialize. Recognizing the financial pressures of running expensive initial plants, many companies aim to maximize output during peak demand periods.

Data centers specifically face challenges in power management, especially when training AI models or responding to varying workloads. The rapid fluctuations in energy demand can put undue stress on traditional power sources, such as natural gas turbines, leading to failures. To mitigate these issues, data centers often rely on large battery banks, which further inflate operational costs.

To address these challenges, TerraPower has designed its 345-megawatt molten salt-cooled reactor to efficiently handle fluctuating energy demands. The reactor is engineered to complement intermittent power sources like wind and solar energy. Notably, instead of adjusting power output, TerraPower maintains a constant nuclear reaction and uses excess heat to heat a reservoir of molten sodium. This stored heat can then be used to generate steam and power turbines during peak demand periods, allowing the reactor to remain productive even when immediate energy demand is low.

This innovative approach leverages the inherent strengths of nuclear energy—maintaining a high capacity factor—while integrating viable energy storage solutions. TerraPower’s strategy positions the company favorably within the competitive landscape of power generation for AI, catering to the rising demand for reliable energy sources in the tech sector.