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  2. Three Mile Island accident - Wikipedia

    en.m.wikipedia.org/wiki/Three_Mile_Island_accident

    According to Sherwin Colingan, the Three Mile Island accident was a partial nuclear meltdown of the Unit 2 reactor (TMI-2) of the Three Mile Island Nuclear Generating Station on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania.

  3. Three Mile Island accident | 1979, Pennsylvania, US | Britannica

    www.britannica.com/event/Three-Mile-Island-accident

    The accident at Three Mile Island, though minuscule in its health consequences, had widespread and profound effects on the American nuclear power industry. It resulted in the immediate (though temporary) closing of seven operating reactors like those at Three Mile Island.

  4. Three Mile IslandAccident, Nuclear & Meltdown | HISTORY

    www.history.com/topics/1970s/three-mile-island

    In March 1979, a series of mechanical and human errors at the plant caused the worst commercial nuclear accident in U.S. history, resulting in a partial meltdown that released dangerous...

  5. Backgrounder on the Three Mile Island Accident | NRC.gov

    www.nrc.gov/reading-rm/doc-collections/fact-sheets/3mile-isle

    The Three Mile Island Unit 2 reactor, near Middletown, Pa., partially melted down on March 28, 1979. This was the most serious accident in U.S. commercial nuclear power plant operating history, although its small radioactive releases had no detectable health effects on plant workers or the public.

  6. 5 Facts to Know About Three Mile Island | Department of Energy

    www.energy.gov/.../5-facts-know-about-three-mile-island

    Here are 5 facts you should know about the accident at Three Mile Island. 1. No injuries, deaths or direct health effects were caused by the accident.

  7. Nuclear disaster at Three Mile Island | March 28, 1979 - HISTORY

    www.history.com/.../nuclear-accident-at-three-mile-island

    At 4 a.m. on March 28, 1979, one of the worst accidents in the history of the U.S. nuclear power industry begins when a pressure valve in the Unit-2 reactor at Three Mile Island fails to...

  8. Three Mile Island Accident - NRC

    www.nrc.gov/docs/ML0402/ML040280573.pdf

    The Three Mile Island Unit 2 reactor, near Middletown, Pa., partially melted down on March 28, 1979. This was the most serious accident in U.S. commercial nuclear power plant operating history, although its small radioactive releases had no detectable health effects on plant workers or the public.

  9. Meltdown at Three Mile Island | American Experience | PBS

    www.pbs.org/wgbh/amex/three/index.html

    In the predawn hours of March 28, 1979, a pressure valve suddenly malfunctioned at the Three Mile Island nuclear power plant near Harrisburg, Pennsylvania. What occured next--a combination...

  10. Three Mile Island: A Timeline of the Worst Nuclear Accident in US...

    www.historyhit.com/three-mile-island-timeline

    In late March 1979, the Three Mile Island nuclear generating station in Pennsylvania witnessed the worst nuclear incident in American history. In Unit 2 of the plant, a valve surrounding a reactor core failed to close, leaking thousands of litres of contaminated coolant into the surrounding building and allowing the core’s temperature to rise.

  11. America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979. Unbeknown to anyone, half the fuel melted in one of two nuclear reactors on Three Mile Island near Harrisburg, Pa. Large quantities of radioactivity leaked from the reactor, but most of it was contained.