Chicago Pile-1, Nuclear research site at University of Chicago, United States
The Chicago Pile-1 reactor contained forty thousand graphite blocks arranged in a wooden frame structure measuring twenty-five feet wide and twenty feet tall.
On December 2, 1942, scientists led by Enrico Fermi achieved the first controlled nuclear chain reaction, marking a fundamental milestone in nuclear physics research.
The facility became part of the Manhattan Project, bringing together international scientists who collaborated despite wartime restrictions and security classifications.
The reactor operated at half a watt power output without radiation shielding or cooling systems, using natural uranium as fuel and graphite blocks as neutron moderators.
The experimental nuclear pile remained active for only thirty minutes during its first operation before scientists shut it down to prevent heat and radiation risks.
Location: Illinois
Part of: Manhattan Project
GPS coordinates: 41.79222,-87.60083
Latest update: May 26, 2025 19:13
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