Near signs that warn of radioactive risk at Oak Ridge National Laboratory, a half-dozen workers from the nuclear power company X-energy are making what appear to be gray billiard balls. Inside, they're packed with thousands of tiny black spheres that each contain a speck of uranium enriched beyond what today’s power plants use.
The United States is chasing a new age of nuclear power that banks on domestic production of reactor fuel like X-energy is making, and though the work at Oak Ridge is unfolding across just 3,000 square feet, X-energy and others are already revving up for big production.
