“A resilient and diverse domestic supply chain is crucial to completing our Natrium plant,” said TerraPower CEO Chris Levesque, as the company handed out three more supplier contracts for its reactor project in Kemmerer, Wyoming.
The awards were announced on July 9, 2025. They make up the fifth round of procurement for the project, which TerraPower describes as the country’s first commercial-scale advanced reactor effort.
Who got what
AVANTech, based in South Carolina, will design sodium processing system modules and supporting skids for the plant. It will also build and deliver the cold trap skid for the Test and Fill Facility.
Structural Integrity Associates, which has offices across the U.S., will design and fabricate a radiation monitoring cabinet, the Sodium Cover Gas Gamma Spectroscopy Analysis Cabinet. It measures gamma radiation in the cover gas exhaust to track radioisotopes.
PAR Systems, headquartered in Minnesota, gets the Pool Handling Machine. That is a specialized crane that moves spent fuel assemblies and related components around the spent fuel pool, for storage, inspection and maintenance.
Levesque said each award “reflects our readiness and resolve to deliver reliable, advanced nuclear energy.”
The reactor and the schedule
Natrium pairs a 345 MWe sodium-cooled fast reactor with a molten salt energy storage system. The storage can lift output to 500 MW when demand peaks, and World Nuclear News put the duration at more than five and a half hours. TerraPower says no other advanced reactor design does this. The technology is shared between TerraPower and GE-Hitachi.
The demonstration plant is going up near a retiring coal facility. A groundbreaking ceremony marked the start of non-nuclear construction in June 2024. TerraPower expects the plant to be finished in 2030, and it is being developed through the U.S. Department of Energy’s Advanced Reactor Demonstration Program, a public-private partnership.
The company says it has already secured all of the long-lead items for the project and awarded the entire Natrium reactor enclosure system.
Licensing and money
TerraPower was the first developer to file a construction permit application for a commercial advanced reactor with the U.S. Nuclear Regulatory Commission, in March 2024. The NRC said the week before the announcement that it now expects to finish its review by the end of 2025, ahead of the original August 2026 date.
The month before, NVentures, the venture arm of NVIDIA, joined a USD 650 million raise that TerraPower said would fund the first Natrium plant and plans for more units in the U.S. and abroad. Existing investors, including founder Bill Gates and South Korea’s HD Hyundai, took part as well.
Sources
- TerraPower awards Natrium supplier contracts
- TerraPower Awards New Supply Chain Orders for Natrium® Project
- TerraPower Awards Three More Supplier Contracts For Wyoming Nuclear Plant Project
