Workers manually shut down a reactor at PSEG's Salem nuclear plant in southern New Jersey Thursday night after a leak was detected in the containment building.
The Nuclear Regulatory Commission says slightly radioactive water was discovered leaking at a rate of four gallons a minute. Regulations require a shutdown if a leak exceeds 1 gallon a minute. The leak was confined to the plant's containment building.
The leak's source appears to be a pressurizer spray valve used in the reactor coolant system, which had been replaced several months ago during a refueling outage, the NRC said.
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