Three Mile Island Unit 1

Three Mile Island Unit 1 is a nuclear power plant located near Harrisburg, Pennsylvania. It became famous for experiencing a partial meltdown on March 28, 1979, which was the most serious accident in U.S. commercial nuclear power plant history. The incident was caused by a combination of mechanical failures and operator errors, leading to a release of small amounts of radioactive gases. Although there were no immediate injuries, it raised public concerns about nuclear safety and regulation, prompting major changes in the industry to improve safety protocols and reinforce oversight. The plant remains operational today with enhanced safety measures.