Scram as the original and mostly likely accurate basis for the use of scram in the technical context. A persistent alternative explanation posits that scram is an acronym for 'safety control rod axe man', which was supposedly coined by Enrico Fermi when the world's first nuclear reactor was built under the spectator seating at the University of Chicago's Stagg Field. It could also stand for "Safety Control Rods Activation Mechanism" or "Control Rods Actuator Mechanism". Both of these are probably backronyms from the original, non-technical usage. In any reactor, a SCRAM is achieved by inserting large amounts of negative reactivity mass
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 "...