The Brookhaven nuclear reactor
DOI: 10.1063/1.3067141
On August 22, 1950 the Brookhaven reactor became critical. The work of scientists is notable for its lack of drama. It is usually difficult to say when a piece of apparatus starts to work, and it is even more difficult to decide when an experiment is complete. The uranium chain reaction is outstanding, therefore, since the change from an inert subcritical assembly of fissionable material to a supercritical chain reactor is sudden and, to all intents and purposes, discontinuous.
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Lyle B. Borst, Massachusetts Institute of Technology and Brookhaven National Laboratory.
