The National Nuclear Security Administration and the Tennessee Valley Authority announced Wednesday, Aug. 22, 2018, that they intend to enter into an agreement to “down-blend” highly enriched uranium to low-enriched uranium in order to help produce tritium, a key “boosting” component in nuclear weapons. The highly enriched uranium used for the “down-blending” is processed, packaged, and shipped from the Y-12 National Security Complex in Oak Ridge. (File photo by John Huotari/Oak Ridge Today)