Bill Gates-Backed TerraPower Gets Approval to Build Sodium-Cooled Nuclear Reactor in Wyoming

The U.S. Nuclear Regulatory Commission has granted a construction permit for TerraPower’s Natrium reactor in Wyoming, marking the first such approval for a commercial-scale non-light water reactor in over 40 years. The reactor, which includes a molten-salt-based energy storage system, will allow the facility to increase output up to 500 MWe when needed.

TerraPower, backed by Bill Gates, submitted its application in March 2024, and the NRC completed its review in 18 months, significantly faster than the original timeline. This project is supported by the U.S. Department of Energy's Advanced Reactor Demonstration Program.

The reactor will be located near a retiring coal plant in Wyoming and is expected to be completed in 2030. Before operations can begin, TerraPower will need to submit a final safety analysis report and obtain an operating license.

Why Did This Happen?

TerraPower’s reactor design is considered a key step in advancing nuclear energy in the U.S. The sodium-cooled fast reactor will use high-assay low-enriched uranium and features energy storage that allows for flexible power output. This makes it compatible with renewable energy sources and more adaptable to grid demands.

The reactor’s approval is also tied to federal support, with up to $2 billion in funding allocated under the Department of Energy’s Advanced Reactor Demonstration Program. This public-private partnership aims to demonstrate the viability of advanced nuclear technologies.

What Are Analysts Watching Next?

The NRC used a risk-informed, performance-based licensing approach for the project, which is a first for a power reactor in the U.S. This could set a precedent for future advanced reactor projects.

Analysts will closely monitor whether TerraPower can meet its construction and operational deadlines. The project’s completion by 2030 is ambitious, and delays could raise concerns about the timeline for advanced nuclear deployment.

The reactor’s ability to ramp output during peak demand could influence how other advanced nuclear projects are designed. If successful, the model may encourage further investment in sodium-cooled and other advanced reactor designs.

What Are the Implications for the Nuclear Energy Sector?

The Natrium reactor could serve as a blueprint for future utility-scale advanced nuclear projects. If it demonstrates reliable and flexible power output, it may reduce regulatory and financial barriers for similar designs.

The project also highlights the potential for nuclear energy to complement renewable energy systems. The ability to adjust output based on grid needs is a valuable feature in a decarbonizing energy market.

The success of the Natrium reactor will be important for investor sentiment in the nuclear energy sector. A timely and cost-effective completion could boost confidence in advanced nuclear technologies, encouraging further innovation and investment.