At 1355 hrs. EDT, an event was recorded by the seismic monitoring system. The seismic monitoring system classified the event as less than
Operating Basis Earthquake (
OBE) and less than
Safe Shutdown Earthquake (
SSE). The seismic monitoring system additionally classified the event as Seismic: NO
At 1405 hrs., SSES [Susquehanna Steam Electric Station] declared an Unusual Event [under EAL OU5] after confirmation by outside agencies that an actual seismic event had occurred and reports from numerous personnel that they had detected ground motion.
At time of transmittal there is no indication of equipment damage, personnel injuries and no automatic initiations of any ECCS or ESF systems or RPS actuations occurred. Assessment of any equipment damage is ongoing.
The licensee has notified the NRC Resident Inspector and state and local authorities.
- * * UPDATE FROM FRITZ OHLSEN TO JOHN KNOKE AT 2110 EDT ON 8/23/11 * * *
The licensee has terminated the Notification of Unusual Event. The licensee has notified the NRC Resident Inspector and state and local authorities.
Notified R1DO (Krohn),
IRD (Morris),
DHS (Bean) and
FEMA (Via).
