Phoenix 24
A next-generation reactor could power 400,000 homes and reshape energy infrastructure.
KEMMERER
TerraPower, the nuclear technology company founded by Bill Gates, is advancing construction of a $4 billion next-generation nuclear power plant in Wyoming, marking an important step in the United States’ efforts to develop reliable electricity sources capable of supporting industrial growth and rising energy demand.
The facility, known as Kemmerer Unit 1, will use the company’s Natrium reactor technology, combining a sodium-cooled nuclear reactor with an innovative energy storage system. The project is designed to generate 345 megawatts of electricity continuously and increase output to 500 megawatts during periods of higher demand.
According to TerraPower, the combined system could supply electricity equivalent to the needs of approximately 400,000 households. That figure represents projected capacity rather than electricity already being delivered to consumers.
The project received construction authorization from the US Nuclear Regulatory Commission earlier in 2026. Construction of the nuclear facility formally began in April, following earlier site preparation work initiated in 2024.
During a visit to Kemmerer in October, Gates and company executives reviewed progress on the installation, which is being developed near an existing coal-fired power station. The location reflects an emerging strategy to repurpose energy infrastructure and preserve skilled employment in communities historically dependent on fossil fuels.
Unlike conventional reactors that rely on water for cooling, Natrium uses liquid sodium to transfer heat. Its integrated molten-salt storage system is intended to provide additional electricity during periods of high consumption, improving flexibility within power networks increasingly supplied by renewable energy.
The technology could become particularly relevant as artificial intelligence, data centers and industrial electrification increase demand for dependable electricity. However, its economic performance and operational reliability will require demonstration under commercial conditions.
Financing involves a public-private partnership supported by the US Department of Energy’s Advanced Reactor Demonstration Program. Federal support could reach $2 billion, with TerraPower and its partners contributing corresponding investment.
One important challenge concerns nuclear fuel. The reactor requires high-assay low-enriched uranium, commonly known as HALEU, whose commercial supply remains limited. Developing reliable domestic production is therefore essential to reducing dependence on foreign suppliers, including Russia.
The project has also encountered industrial challenges. TerraPower recently announced plans to reorganize its engineering and construction contracting arrangements after deciding not to continue into the next project phase with longtime contractor Bechtel.
Company officials maintain that the transition is intended to protect the construction schedule, with commercial operation still targeted for 2030.
For Wyoming, the development offers potential employment and investment opportunities. TerraPower estimates that construction could require approximately 1,600 workers at peak activity, followed by around 250 permanent operational positions.
Nevertheless, the broader implications extend beyond one American community. If successful, Natrium could provide a model for integrating advanced nuclear generation with energy storage and renewable electricity.
The project’s significance will ultimately depend on construction costs, regulatory compliance, fuel availability and demonstrated operating performance.
For Gates and TerraPower, the challenge is converting an ambitious engineering concept into commercially viable infrastructure capable of meeting future electricity needs.
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