TerraPower Begins Construction on First US Commercial-Scale Advanced Nuclear Reactor

The NRC allow was issued sooner than the September 2026 timeline beforehand cited in ENR reporting, following completion of the company’s security analysis and environmental evaluate.

“We’re not simply breaking new floor on a first-of-a-kind nuclear plant in Wyoming; we’re constructing the subsequent era of America’s power infrastructure,” stated TerraPower President and CEO Chris Levesque, describing the Kemmerer Unit 1 undertaking as a industrial blueprint to mobilize a fleet of Natrium vegetation throughout the nation and all over the world.

Wyoming Gov. Mark Gordon (R) welcomed the milestone as an indication of the state’s continued power management. “Wyoming has lengthy powered this nation, and in the present day we’re main once more, this time in next-generation nuclear expertise,” he stated, citing the undertaking’s promise of dependable energy and good-paying jobs.

Plant Design and Expertise

The Kemmerer Unit 1 plant is designed round a sodium-cooled quick reactor paired with a molten salt power storage system, a joint expertise of TerraPower and GE Vernova Hitachi Nuclear Vitality.

The system offers regular baseload era at 345 MW and may enhance output to 500 MW throughout peak demand—sufficient to energy roughly 400,000 properties—enabling the plant to enhance intermittent renewable assets on the grid.

The plant is being developed below the U.S. Dept. of Vitality’s Superior Reactor Demonstration Program, a public-private initiative supported by roughly $2 billion in federal funding matched by TerraPower.

“The Natrium reactor reveals that when authorities and personal business work collectively, we are able to construct a brilliant future for our nation powered by nuclear,” stated Rian Bahran, DOE’s deputy assistant secretary for nuclear power.

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Development Scope and Workforce

Bechtel is serving because the engineering, procurement and development contractor for the undertaking, a job it has held since 2020.

“The beginning of development at Kemmerer Unit 1 marks an vital step ahead for the undertaking and for the subsequent era of U.S. nuclear power,” stated Dena Volovar, president of Bechtel’s Nuclear, Safety and Environmental enterprise.

“By combining TerraPower’s reactor innovation with Bechtel’s processes, expertise and execution mannequin, we are going to ship these nuclear tasks persistently, safely and at scale,” she added.

Early work has included website preparation and development of non-nuclear assist amenities and infrastructure, with reactor development now continuing below federal authorization.

NRC spokesman Scott Brunell beforehand informed ENR the undertaking could be reviewed as a full industrial energy plant, not a non-power demonstration facility, as a result of it’ll produce electrical energy when accomplished.

With development underway, TerraPower is mobilizing a workforce of about 1,600 craft employees at peak, with roughly 250 everlasting staff anticipated as soon as the plant turns into operational. The undertaking is positioned on the website of PacifiCorp’s retiring Naughton coal-fired energy plant and can provide electrical energy to the grid via Rocky Mountain Energy, the undertaking’s utility accomplice.

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Commercialization Push

TerraPower has superior commercialization efforts for the Natrium design forward of the Kemmerer plant’s projected completion by the tip of the last decade.

The corporate has an settlement with Meta for as much as eight Natrium vegetation by 2035 and, in March 2025, introduced a strategic alliance with skilled providers agency KBR to determine a replicable contracting framework for deployment in North America, the U.Okay. and the European Union.

TerraPower was the primary U.S. developer to hunt a development and working allow for a commercial-scale superior reactor, submitting its utility with the fee in March 2024.

The beginning of nuclear development at Kemmerer represents a key check of whether or not superior reactor designs can transfer past pilot-scale improvement into repeatable industrial supply—a threshold the U.S. nuclear sector has not crossed in a long time—and indicators a possible pathway for changing retiring coal belongings into agency, dispatchable energy era.