The Nuclear Regulatory Commission have launched a special inspection of safety relief valves on Unit 1 of the Hatch nuclear plant.
The plant, operated by Southern Nuclear Operating Co., is located near Baxley, Ga., about 20 miles south of Vidalia.
After the unit’s last refueling outage, plant officials sent all 11 of the safety relief valves, which provide protection from excessive steam pressures and had been replaced during the outage with the same type of valve, to a laboratory for testing. During test procedures, three of the valves did not perform as expected. The cause of the three valves failing to close during the tests has not yet been determined.
Even though the valves were in service during the unit’s last operating cycle, none failed during reactor operations and there was no danger to the public.
“These valves provide an important safety function and it is essential that we understand why they failed to perform as expected during these tests,” said Cathy Haney, Region II administrator. “We felt a special inspection was warranted to gather more information about these valves.”
The onsite portion of the inspection will take several days. A report documenting the results of the inspection should be issued within 45 days of the completion of the inspection.