Clean tech startup Fluxnium develops fiber technology to extract uranium from seawater

SAN FRANCISCO — Clean technology startup Fluxnium has developed specialized fibers capable of extracting uranium directly from seawater, according to a report published on Sept. 16, 2026, by TechCrunch.

Strategic Context

Oceans contain an estimated 50,000 years' worth of nuclear fuel supply, representing a vast reservoir of dissolved uranium. Traditional nuclear fuel relies entirely on land-based mining and extraction processes. Fluxnium's specialized fibers target the marine environment directly, aiming to capture the uranium suspended in seawater and provide an alternative to conventional terrestrial ore extraction.

Forward Outlook

Energy developers, industrial operators, and nuclear fuel supply chain managers will monitor whether Fluxnium can transition its fiber extraction methodology from initial development to scalable deployment. Commercial viability will depend on the durability of the fibers in open-water conditions, the efficiency of the extraction process, and the ability to process the recovered material into usable nuclear fuel at a competitive cost relative to mined uranium.