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Today 2019 July 15 (view also the next Week): Born:Rembrandt(1606), Aida Maria Jaime Yespica(1982
), Brigitte Nielsen(1963
), Clive Cussler(1931), Forest Whitaker(1961
) Dead: Anton Chekhov(1904), Gianni Versace(1997
), Lawrence Tibbett(1960
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,
It was the worst accident in U.S. commercial nuclear power plant history.
The incident was rated a five on the seven-point International Nuclear Event Scale: Accident With Wider Consequences.
The accident began with failures in the non-nuclear secondary system, followed by a stuck-open pilot-operated
relief valve in the primary system, which allowed large amounts of nuclear reactor coolant to escape.
The mechanical failures were compounded by the initial failure of plant operators to recognize
the situation as a loss-of-coolant accident due to inadequate training and human factors,
such as human-computer interaction design oversights relating to ambiguous control room indicators
in the power plant's user interface.
In particular, a hidden indicator light led to an operator manually overriding the automatic
emergency cooling system of the reactor because the operator mistakenly believed that there
was too much coolant water present in the reactor and causing the steam pressure release.
3 mile island nuclear accident
1979 ~ 3 Mile Island in Middletown, PA a partial meltdown of the nuclear core.
3 Mile Island Nuclear Disaster, the United States’ most disastrous nuclear accident
mile island nuclear disaster
March 28 the worst nuclear power accident in the U.S. history begins when a pressure valve in the Unit
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