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Stuck valves and confused operators triggered a partial nuclear meltdown at Penn
Featured Event 1979 Event

March 28

Three Mile Island Meltdown: Nuclear Safety Crisis Ignites

Stuck valves and confused operators triggered a partial nuclear meltdown at Pennsylvania's Three Mile Island plant, releasing radioactive gases into the environment. This disaster crystallized public fear, sparked new federal regulations, and effectively halted the construction of new reactors in the United States for decades. Cleanup eventually cost $1 billion, yet studies found no causal link between the release and increased cancer rates nearby.

March 28, 1979

47 years ago

Key Figures & Places

What Else Happened on March 28

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