Remembering the Chicago Pile, the First Nuclear Reactor
a day ago
- On December 2, 1942, the world's first nuclear reactor, the Chicago Pile, was activated beneath Stagg Field at the University of Chicago.
- The reactor was built from graphite blocks and uranium, with minimal safety features and no prior guidelines, operating in secrecy without informing city officials.
- The experiment reached criticality and was shut down after half an hour; later reconstituted as Chicago Pile-2 and used for over a decade.
- The Pile was part of the Manhattan Project, aimed at producing plutonium for nuclear weapons, and its data informed later reactors, including those for the Trinity test and Nagasaki bomb.
- Wartime security concerns labeled some scientists, including Fermi and Szilard, as 'enemy aliens,' but efforts were made to retain their expertise.
- After completing major tasks, Chicago scientists reflected on social and political implications, producing the Franck Report which argued against unannounced atomic bombings, though it was ignored.
- The scientists also advocated for peaceful uses of nuclear technology, leading to the creation of national laboratories and organizations like the Bulletin of the Atomic Scientists, fostering scientific activism.
- A bronze plaque commemorating the event was installed, with a rejected suggestion to add 'for better or worse' to the inscription.