Thorium Offers Cleaner Nuclear Option, but U.S. Industry Sticks with Uranium

Thorium advocates highlight its abundance—estimated at 2,000 times the usable uranium on Earth—and its potential to cut long-lived radioactive by-products, since the thorium cycle mainly yields uranium-233. However, the element cannot sustain a reaction alone and must be paired with enriched uranium, complicating fuel fabrication and licensing. Historical U.S. projects such as Oak Ridge's molten-salt experiment and Colorado's Fort St. Vrain reactor showed technical feasibility but failed economically, reinforcing industry inertia around uranium.

Recent Chinese work in the Gobi Desert achieved a thorium-to-uranium conversion, a milestone that underscores the gap between U.S. research and commercial readiness. Analysts cite infrastructure gaps, high development costs, and regulatory burdens as the main barriers to adopting thorium at scale. The divergence may leave the United States dependent on existing uranium supply chains while rivals develop an alternative fuel pathway.