three mile island definition
The Three Mile Island accident was a partial nuclear meltdown that occurred on March 28, 1979, in one of the two Three Mile Island nuclear reactors in Dauphin County, Pennsylvania, United States.It was the worst accident in U.S. commercial nuclear power plant history.he Three Mile Island accident inspired Charles Perrow 's Normal Accident Theory, in which an accident occurs, resulting from an unanticipated interaction of multiple failures in a complex system.