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

The cost to acquire uranium for nuclear power generation may soon fall significantly, potentially making existing plants more profitable and new ones more feasible.

Fluxnium, a clean tech startup, has developed a method for extracting uranium from seawater, potentially unlocking a vast and stable fuel source for nuclear power. The company, which has been operating in stealth, announced a $7 million seed round led by Congruent Ventures. Their technology utilizes specialized polymer fibers, licensed from the U.S. Department of Energy, designed to attract dissolved uranium. These fibers are deployed in the ocean for 30-60 days and then brought ashore for uranium extraction. Fluxnium claims their process can be cost-competitive with traditional uranium mines and avoids toxic tailings. The technology aims to address concerns about the geopolitical risks and limited supply of uranium from land-based mines, especially as demand for nuclear power, driven partly by AI data center energy needs, is projected to increase.

Fluxnium's innovation could fundamentally alter the nuclear fuel supply chain by offering a decentralized and abundant source of uranium, mitigating risks associated with geopolitical instability and the finite nature of conventional mines. This development is particularly timely given the resurgence of nuclear power and the escalating energy demands of AI infrastructure, which are already straining current uranium supplies and driving up prices.

The company's ability to scale its proprietary fiber production and ocean deployment will be critical to its success in bringing down extraction costs below those of land-based mining. Investors and nuclear plant operators will be watching Fluxnium's progress in demonstrating commercial viability and securing offtake agreements as they navigate the complex regulatory landscape for novel fuel sources.