Deals Counterparts

TerraPower receives construction permit for first U.S. commercial-scale advanced nuclear reactor

Development Nuclear announced Kemmerer, United States Mar 9, 2026
345 MW
Capacity
development
Stage
Kemmerer Unit One
Project

TerraPower received a construction permit from the U.S. Nuclear Regulatory Commission (NRC) for its commercial-scale advanced nuclear reactor utilizing Natrium technology. This marks the first-ever construction permit issued by the NRC for such a plant, with the Kemmerer Unit One project expected to be completed in 2030 and provide a baseload output of 345 MW, boosting to 500 MW for over five hours with its molten salt energy storage system. The project is being developed through the U.S. Department of Energy's Advanced Reactor Demonstration Program (ARDP), a public-private partnership.

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Deal Analysis

The U.S. Nuclear Regulatory Commission has just greenlit a groundbreaking project, issuing its first-ever construction permit for a commercial-scale advanced nuclear reactor to TerraPower. This isn't just about adding 345 MW of baseload power by 2030; the Kemmerer Unit One project uniquely integrates a molten salt energy storage system, allowing it to surge to 500 MW for over five hours. As a nuclear innovation company, TerraPower is spearheading this development under the U.S. Department of Energy's Advanced Reactor Demonstration Program, marking a tangible step for next-generation nuclear technology in the United States.
  • First-ever NRC construction permit for a commercial-scale advanced nuclear reactor.
  • 345 MW baseload capacity, with a 500 MW boost for 5+ hours via molten salt storage.
  • Target completion for the Kemmerer Unit One project is 2030.

Source Intelligence

KEY DETAILS

The Natrium system combines a 345 MW sodium fast reactor with a molten salt energy storage system. The built-in storage system can boost energy delivery to up to 500 MW for more than five hours. The project is the first commercial-scale advanced nuclear plant to receive this permit. TerraPower and Meta signed an agreement in January to build up to eight advanced nuclear reactors in the United States. Quotes: "combining a 345 MW sodium fast reactor with a molten salt energy storage system capable of retaining large amounts of energy that can be used to power the grid during periods of peak demand when weather or darkness reduce renewable output.", "each plant’s built-in storage system can boost energy delivery to up to 500 MW for more than five hours.", "This is the first commercial-scale advanced nuclear plant to receive this permit.", "In January, Terra Power and Meta signed an agreement to build up to eight advanced nuclear reactors in the United States."

Capacity
combining a 345 MW sodium fast reactor with a molten salt energy storage system capable of retaining large amounts of energy that can be used to power the grid during periods of peak demand when weather or darkness reduce renewable output. While providing a baseload output of 345 MW
Location
The first planned reactor, Kemmerer Unit One, is located near the site of a retiring coal facility in Kemmerer, Wyomings.
Announcement
Kenny Fisher March 9, 2026 Nuclear technology company TerraPower announced that it has received a construction permit
Expected Close
The project is expected to be completed in 2030
PARTIES MENTIONED IN SOURCE
T
TerraPower developer

"Nuclear technology company TerraPower announced that it has received a construction permit"

U
U.S. Nuclear Regulatory Commission (NRC) regulator

"from the U.S. Nuclear Regulatory Commission (NRC)"

U
U.S. Department of Energy (DOE) partner

"The first Natrium plant is being developed through the U.S. Department of Energy’s Advanced Reactor Demonstration Program (ARDP), a public-private partnership."

high quality Enriched Mar 9, 2026

Timeline

Announced
Mar 9, 2026
Signed
Closed

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