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Natrium™ Reactor and Integrated Energy Storage

Providing flexible clean energy at a competitive cost
Natrium power cycle

The Next Generation of Clean Energy Production

TerraPower and GE Hitachi Nuclear Energy brought together their decades of unparalleled design expertise and technical capabilities to develop the Natrium™ technology, which features a cost-competitive sodium fast reactor combined with a molten salt energy storage system. This unique combination will provide clean, flexible energy and stability, and integrate seamlessly into power grids with high penetrations of renewables.

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The Natrium technology is one of the fastest and lowest-cost paths to provide world-changing, advanced clean energy. The system features a 345MWe reactor and can be optimized for specific markets. Its innovative thermal storage has the potential to boost the system’s output to 500MWe of power for more than five and a half hours when needed. This allows for a nuclear design that follows daily electric load changes and helps customers capitalize on peaking opportunities driven by renewable energy fluctuations. As more renewables are integrated into the grid, the demand for gigawatt-hour-scale energy storage will continue to increase.

Today, TerraPower leads a team working to demonstrate the Natrium reactor at a retiring coal plant in Wyoming.

Learn more about the Natrium technology at

Natrium cutaway illustration

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