The China Syndrome The China Syndrome The China Syndrome is a 1979 American disaster thriller film directed by James Bridges and written by Bridges, Mike Gray, and T. S. Cook. It tells the story of a television reporter and her cameraman who discover safety coverups at a nuclear power plant. It stars Jane Fonda, Jack Lemmon, and Michael Douglas, with Douglas also serving as the film's producer. The cast also features Scott Brady, James Hampton, Peter Donat, Richard Herd, and Wilford Brimley. "China syndrome" is a fanciful term—not intended to be taken literally—that describes a fictional result of a nuclear meltdown, where reactor
Nuclear reactor which produce delayed neutrons have half lives for their decay by neutron emission that range from milliseconds to as long as several minutes, and so considerable time is required to determine exactly when a reactor reaches the critical point. Keeping the reactor in the zone of chain-reactivity where delayed neutrons are "necessary" to achieve a critical mass state allows mechanical devices or human operators to control a chain reaction in "real time"; otherwise the time between achievement of criticality and nuclear meltdown as a result of an exponential power surge from the normal nuclear chain reaction, would be too short