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Exclusive: Clean tech startup Fluxnium found a way to tap 50,000 years' worth of nuclear fuel

Summary by TechCrunch
Fluxnium's fibers can extract uranium directly from seawater, which has enough of the nuclear fuel to power thousands of generations.

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The United States is seeking to increase its nuclear capacity but faces challenges in securing fuel. Fluxnium offers an innovative solution for extracting uranium from seawater. Fluxnium, a clean technology company, is finding a way to utilize 50,000 years' worth of nuclear fuel. The US plans to triple its nuclear power plant capacity by 2050, but this goal may face an obstacle… The article "Fluxnium: Extracting Uranium from Seawater" first app…

Fluxnium seeks to resolve dependence on uranium mines with polymer fibers installed in the ocean, a bet that could take advantage of estimated reserves of billions of tons and reduce geopolitical risks, although it still has to demonstrate that its process is competitive on a commercial scale.

The Fluxnium startup attracted $7 million in a seed round for uranium extraction technology from seawater and says it reduced process costs.

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TechCrunch broke the news in San Francisco, United States on Wednesday, September 16, 2026.
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