The Y-12 National Security Complex is a key U.S. Department of Energy facility in Oak Ridge, Tennessee, focused on supporting national security through advanced nuclear operations. It plays a central role in maintaining the nation’s nuclear weapons stockpile, securely storing and processing nuclear materials, and supplying fuel for the U.S. Navy’s nuclear reactors. In addition to its defense mission, Y-12 develops innovative manufacturing and security technologies that help reduce global nuclear threats and support government and industry partners.