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WATCH | CBS21 documentary transports you to 1979 Three Mile Island accident

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The nuclear accident at Three Mile Island changed the industry forever on March 28, 1979.

Monday is the 37th anniversary of the incident where a series of mechanical and human errors at the generating plant in Middletown, Dauphin County led to a partial meltdown and released radioactive gases.

The accident was due to a combination of stuck valves, misread gauges and poor decisions.

Although former Pennsylvania governor Dick Thornburgh evacuated pregnant women from the area, the health effects of the release were not serious. However, the accident heightened public fears and led to the immediate shutdown of several plants.

After the accident, a moratorium on the licensing of all new reactors was temporarily imposed, which significantly slowed down the industry for several years.

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