Chernobyl accident summary | Britannica
https://www.britannica.com/summary/Chernobyl-disaster
WEBChernobyl accident, Accident at the Chernobyl (Ukraine) nuclear power station in the Soviet Union, the worst disaster in the history of nuclear power generation. On April 25–26, 1986, technicians attempted a poorly designed experiment, causing the chain reaction in the core to go out of control.
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