The two-member inspection team arrived at the plant to begin the review. Operators with Dominion (NYSE: D) declared an Unusual Event Oct. 4 based on reactor coolant system leakage of greater than 25 gallons per minute. The leakage came from a relief valve on the plant’s shutdown cooling system, which is used to provide cooling to the reactor when it is out of service.
The shutdown cooling system was isolated from the reactor coolant system, allowing repairs to be made and to return the plant to operational status. The plant was preparing to enter a refueling and maintenance outage when the leak occurred.
After a preliminary assessment of the event, NRC determined that a special inspection was needed. During the special inspections, the NRC team will review operator response to the event, equipment performance and immediate corrective actions.
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