WATERFORD, Conn. (AP) — Federal regulators began an inspection of Connecticut's nuclear power plant Monday, more than a week after a power failure forced both units to shut down and water was found to be slightly radioactive.
The Nuclear Regulatory Commission announced it's examining the response by Millstone Power Station to the May 25 outage that lasted about six hours. Inspectors will look at equipment performance and evaluations by owner Dominion Resources Inc.
Specifically, inspectors will examine drainage from the reactor's coolant system and why equipment, known as a rupture disk, opened to relieve pressure.
"The question we have is, obviously, this should not be the normal sequence of events," said Neil Sheehan, spokesman for the Nuclear Regulatory Commission. "We have questions why this rupture disk had to open in the first place."
The health of plant workers was not affected, the NRC said.
Millstone supplies half of all power in Connecticut and 12 percent throughout New England.
For the first time, power was out at both Units 2 and 3 at the same time. A malfunctioning relay was blamed. Millstone declared an "unusual event" on May 25, the lowest of four levels of emergency classifications.
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