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 Entered dateEvent description
ENS 5269820 April 2017 19:13:00At 1306 (EDT) on April 20, 2017, Control Room Overhead Alarm C6-C4, Seismic Monitor Panel, was received. This alarm normally indicates an actuation of the Hope Creek OBE (Operational Basis Earthquake) Seismic Switch at 0.1g, however, this alarm was accompanied by no other indications of seismic activity. The indicator for a 0.01g earthquake was not actuated, no earthquake was felt on site, and the National Earthquake Information Center recorded no seismic activity in the area. The Seismic Monitor Panel was considered non-functional. With the Seismic Monitor Panel non-functional, the ability to classify EAL HA1.1, Operating Basis Earthquake Detected Onsite, was lost. Testing of the Seismic Monitor Panel is in progress to determine system functionality. The licensee will notify the NRC Resident Inspector.