On Mar. 28, 1979, the most significant nuclear power accident in U.S. history began after a pressure valve failed to close at the Three Mile Island nuclear plant near Harrisburg, Pa. What followed ...

Before it was shut down in 2019, Three Mile Island's Unit 1 had a generating capacity of 837 megawatts, which is enough to power more than 800,000 homes, Constellation said.

Unbeknown to Hauser at the time, a nuclear crisis was unfolding about three miles away from his Middletown, Dauphin County, home. Three Mile Island ... pump from sending cooling water to steam ...

Three Mile Island in Dauphin County before Constellation Energy mothballed the nuclear power plant in 2019. (Peter Hall/Capital-Star) Speakers at a virtual meeting Thursday about Three Mile Island ...

Wizened veterans of Central Pennsylvania’s “No Nukes” movement used the 46th anniversary of the partial meltdown at Three Mile Island to argue ... of the plant’s cooling systems to ...

An accident at the Three Mile Island nuclear power plant March 28 ... “I am informed [by the NRC] that the emergency core cooling system was turned off prematurely – resulting in partial ...

The damaged reactor at Three Mile Island was not the first President ... a possibly explosive hydrogen bubble discovered above the cooling water, at the top of the reactor pressure vessel.