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Describe the disaster at Chernobyl.

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Answer:

the Chernobyl disaster; during a run-down to a lower power, a combination of operator error and xenon poisoning caused the reactor thermal power to fall to near-shutdown levels. The crew's resulting efforts to restore power placed the reactor in a highly unsafe configuration.

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User Yubaraj
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On April 26, 1986, the world's worst nuclear accident happened at the Chernobyl plant near Pripyat, Ukraine, in the Soviet Union. An explosion and fire in the No. 4 reactor sent radioactivity into the atmosphere. Plant operators made several mistakes, creating a poisonous and unstable environment in the reactor core. A peculiarity of the design of the control rods caused a dramatic power surge as they were inserted into the reactor.
User Pbarney
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