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Today in History: B Reactor Begins Plutonium Production at Hanford Site

11/6/2025

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Summary

Story summary

On November 6, 1944, the B Reactor at the Hanford Site in Washington began producing plutonium, marking a pivotal moment in the Manhattan Project. This reactor was crucial for developing nuclear weapons during World War II, supplying plutonium for the atomic bomb used in Nagasaki. It significantly contributed to the U.S. nuclear arsenal.

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Story summary

On November 6, 1944, the B Reactor at the Hanford Site in Washington began producing plutonium, marking a pivotal moment in the Manhattan Project. This reactor was crucial for developing nuclear weapons during World War II, supplying plutonium for the atomic bomb used in Nagasaki. It significantly contributed to the U.S. nuclear arsenal.