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Providing New Energy Resources in Wyoming

Delivering carbon-free, reliable power to the electricity grid and good-paying jobs to Wyoming for decades to come.

The Demonstration Project

TerraPower is working to advance a Natrium™ reactor demonstration project at a retiring coal plant in Kemmerer, Wyoming. This advanced energy demonstration project is intended to validate the design, construction and operational features of the Natrium system, a TerraPower and GE Hitachi technology.

The project features a 345 MWe sodium-cooled fast reactor with a molten salt-based energy storage system.The storage technology can boost the system’s output to 500 MW of power when needed, which is equivalent to the energy required to power around 400,000 homes. The energy storage capability allows the plant to integrate with grids that have a high penetration of renewable resources.

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100% Secure

The Natrium technology enhances safety, building on existing reactors’ already strong track record of safe operations. Instead of water, the Natrium reactor uses sodium as its coolant.


Utilizing Local Workforce

Wyoming has been a leader in energy for more than 100 years. Wyoming is home to highly-skilled, well-trained workers who understand the value of always-on electricity for their communities.


Industry Leading

The Natrium technology will use the high temperature heat from the reactor to power a molten salt storage system that can store tremendous amounts of energy; levels of magnitude larger than the energy stored in typical battery storage facilities.


U.S. Advanced Reactor Demonstration Program

TerraPower is building the Natrium plant through a public-private partnership with the U.S. Department of Energy’s (DOE) Advanced Reactor Demonstration Program (ARDP). This program authorizes up to $2 billion for the Natrium project. TerraPower and partners will match this investment dollar for dollar.

Upon completion, the Natrium plant will be a fully functioning commercial power plant. PacifiCorp will own and operate the plant as part of its energy generation fleet.

Project Supporters