The safety test that destroyed Reactor 4

1986 · Event

At 1:23 a.m., a botched turbine test on a reactor with a hidden design flaw ends in two explosions that blow the thousand-tonne lid off Reactor 4 and set its graphite core burning in the open air. The operators, trained to believe an RBMK cannot explode, spend hours dousing a reactor that no longer exists.

On these timelines: Chernobyl, Eastern Europe & the Balkans, Russia & the USSR, Science & Technology, Master

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