Boilers, Nuclear, O&M, Reactors

Millstone nuclear power unit under special inspections

The U.S. Nuclear Regulatory Commission (NRC) started a special inspection at the Millstone Unit 3 nuclear power plant in Connecticut due to reoccurring issues with a pump in a reactor safety system.

A four-member inspection team will focus on a turbine-driven auxiliary feedwater pump in a system that can be used to help cool down the reactor after a shutdown by pumping water into the secondary side of the plant’s steam generators. The inspection will include the plant operator’s response to the event and root-cause evaluations of the issues.

The first problem happened on May 15, 2013 at the end of a refueling and maintenance outage when workers with Dominion (NYSE: D) noticed the feedwater pump was experiencing speed oscillations during testing. The same issue was seen in the pump on several other dates, most recently on Jan. 23.

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