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Nuclear Event – Unusual Event/Emergency Declared (Seismic Event alarm): Cooper Nuclear Station, Nebraska

2016/09/06

North America – USA | State of Nebraska, Cooper Nuclear Station
Location: 40°21′43″N 95°38′29″W
Present Operational Age: ~42 years
Event: UNUSUAL EVENT/EMERGENCY DECLARED

Nuclear Event in USA on Saturday, 03 September, 2016 at 07:10 [CDT]

UNUSUAL EVENT DECLARED DUE TO SEISMIC EVENT ALARM

At 0710 CDT, Cooper Nuclear Station declared a Notification of Unusual Event under EAL HU1.1 due to the station seismic event alarm registering a response to an earthquake (epicenter near Pawnee, OK). The reactor was not affected by the earthquake and remains at 93 percent power. The licensee is performing walkdowns of structures and equipment to verify that the site is unaffected.

Notified the DHS SWO, FEMA Ops Center, DHS NICC, FEMA National Watch Center (E-mail) and Nuclear SSA (E-mail).

* * * UPDATE FROM ZACH HYDE TO STEVEN VITTO AT 1704 EDT ON 9/3/2016 * * *

At 1547 CDT, Cooper Nuclear Station terminated the Notice of Unusual Event. All inspections and walkdowns of the plant have been completed. No damage or injuries were reported. The seismic event caused no impact to the plant.

The Licensee has notified the NRC Resident Inspector.

Notified R1DO (Warnick), NRR EO (Miller), IRDMOC (Stapleton), DHS SWO, FEMA Ops Center, DHS NICC, FEMA National Watch Center (E-mail) and Nuclear SSA (E-mail).

Source: NRC  Event Number: 52221

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