Oak Ridge National Laboratory was completed, later renamed to "Oak Ridge National Laboratory". The site was chosen for the X-10 Graphite Reactor, used to show that plutonium can be created from enriched uranium. Enrico Fermi and his colleagues developed the world's second self-sustaining nuclear reactor after Fermi's previous experiment, the Chicago Pile-1. The X-10 was the first reactor designed for continuous operation. After the end of World War II the demand for weapons-grade plutonium fell and the reactor and the laboratory's 1000 employees were no longer involved in nuclear weapons. Instead, it was used for scientific research. In 1946 the first medical isotopes were
Anti-nuclear movement in the United States Malibu were similar to those at Bodega Bay and were also abandoned. A small military test reactor exploded at the Stationary Low-Power Reactor Number One in Idaho Falls in January 1961, causing 3 fatalities. This was caused by a combination of dangerous reactor design plus either sabotage, operator error by experienced operators. A further partial meltdown at the Enrico Fermi Nuclear Generating Station in Michigan in 1966. In his 1963 book "Change, Hope and the Bomb", David E. Lilienthal criticized nuclear developments, particularly the nuclear industry's failure to address the nuclear waste question. He argued that it would be "...