On March 28, 1979, TMI experienced the most serious accident in U.S. commercial nuclear power plant operating history. However, this event led to no deaths or injuries to plant workers or members of the nearby community. It brought about sweeping changes regarding many areas of nuclear power plant operations - from emergency response planning to reactor operator training. It also caused the U.S. Nuclear Regulatory Commission to tighten and heighten its regulatory oversight.

Today, the Three Mile Island nuclear plant (TMI) generates enough electricity to power a city the size of Philadelphia. Its world class performance record demonstrates the exceptional focus and hard work of the people who safely and efficiently run the plant.

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