Event Notification Report for August 23, 2011

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

The licensee declared a Notification of Unusual Event due to seismic activity. The reactor was not operating at the time of the earthquake. Facility walkdown is in progress.

* * * UPDATE FROM MOHAMMED AL-SHEIKILY TO HOWIE CROUCH AT 1415 EDT ON 8/23/11 * * *

The licensee exited the NOUE.

Notified R1DO (Krohn) and NRR (Thorp).

ALERT DECLARED DUE TO AN EARTHQUAKE IN THE AREA AND A LOSS OF OFFSITE POWER

At 1403 hrs. EDT, North Anna Power Station declared an Alert due to significant seismic activity onsite. The Alert was declared under EAL HA6.1. Both units experienced automatic reactor trips from 100% power and are currently stable in Mode 3. All offsite electrical power to the site was lost. All four emergency diesel generators (EDG) automatically started and loaded and provided power to the emergency buses.

While operating, the 2H EDG developed a coolant leak and was shutdown. As a result, the licensee added EAL SA1.1 to their declaration.

All control rods inserted into the core. Decay heat is being removed via the steam dumps to atmosphere. No personnel injuries were reported.


* * * UPDATE FROM ROBERT RINK TO HOWIE CROUCH AT 1116 EDT ON 8/24/11 * * *

The licensee has downgraded the Alert to a Notification of Unusual Event based on equipment alignments and inspection results.

The licensee notified R2 IRC. Notified IRD (Marshall), NRR (Thorp), FEMA (Hollis), DHS (Inzer), USDA (Ferezan), HHS (Willis) and DOE (Parsons).


* * * UPDATE FROM ROBERT RINK TO HOWIE CROUCH AT 1317 EDT ON 8/24/11 * * *

The licensee has exited the Notification of Unusual Event at 1315 EDT. The exit criteria was that all inspections and walkdowns were completed and plant conditions no longer meet the criteria for a NOUE.

Notified R2DO (Widmann), IRD (Marshall), NRR (Thorp), FEMA (Hollis), DHS (Inzer), USDA (Ferezan), HHS (Willis) and DOE (Jackson).


* * * UPDATE FROM DON TAYLOR TO DONALD NORWOOD AT 1405 EDT ON 8/26/11 * * *

"This notification is to report new information identified post event that a condition existed which met the emergency plan criteria but was not declared. On August 23 at 1403 EDT, North Anna Power Station declared an Alert due to seismic activity onsite. The Alert was declared under Emergency Action Level (EAL) HA6.1 "Other conditions existing which in the judgment of the SM warrant declaration of an alert. Initial review of seismic response data from the earthquake on 8/23/11 (1348 hours) indicates that design spectrum input assumptions (i.e. Design Basis Earthquake [DBE] limits) may have been exceeded above 5 HZ. This would have resulted in classification of an Alert under EAL HA1.1.

"No significant equipment damage to safety related systems (including class I structures) has been identified through site walk-downs nor has equipment degradation been detected through plant performance and surveillance testing following the earthquake."

The licensee notified the NRC Resident Inspector. The licensee also plans on notifying the State Emergency Operations Center and the Louisa County County Administrator.

Notified R2DO (Widmann) and NRR EO (Bahadur).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

The licensee declared a Notification of Unusual Event due to seismic activity. Equipment walkdowns performed. The licensee also terminated the event at the time of notification.

NOTIFICATION OF UNUSUAL EVENT DUE TO SEISMIC EVENT

"PBAPS [Peach Bottom Atomic Power Station] Units 2 and 3 experienced a seismic event which was felt in the control room in conjunction with a seismic trigger alarm set a 0.01G acceleration. The operating basis earthquake alarm of 0.05G was not received.

'Both units continue to operate at pre-event levels.

"Currently there is no indication of damage at the site. Initial plant walkdowns indicate no plant damage and walkdowns are continuing."

There were no personnel injuries. The licensee has notified the NRC Resident Inspector.

* * * UPDATE FROM BRAD KIRKMON TO HOWIE CROUCH AT 1800 EDT ON 8/23/11 * * *

"At 1750 hrs. EDT, Peach Bottom terminated the Unusual Event that was declared at 1401 today due to a seismic event that occurred at the station. Both Unit 2 and 3 operational walk downs of the site have been completed. There are no issues related to the seismic event which would impact continued safe operation of either unit."

The licensee has made state and local notifications as well as notifying the NRC Resident Inspector. Notified R1 IRC (Dentil), IRD (Gott), DHS, FEMA, HHS, USDA.

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"At 1354, the Calvert Cliffs Nuclear Plant (CCNPP) felt seismic activity in the control room.

"Both Unit 1 and Unit 2 maintained full power operations. At 1405 CCNPP declared an Unusual Event (UE) for Unit 1 and Unit 2. NRC Operations center was notified at 1453 via dedicated phone (CCNPP event 4189).

"Both Units continued to operating safely with no actuations. There were no radiological releases.

"An Issue Response Team (IRT) was formed and the site commenced walkdown and inspections of all systems, structures and components for possible seismic damage. All problems found will be entered into the site's Corrective Action Program (CAP) and evaluated for operability."

The licensee notified the NRC Resident Inspector, State, and local government agencies.

* * * UPDATE FROM JUSTIN INLOW TO CHARLES TEAL AT 0027 EDT ON 8/24/11 * * *

They have terminated their Notification of Unusual Event as of 0005 EDT. The licensee has notified the NRC Resident Inspector.

Notified R1DO (Krohn), IRD (Morris), DHS (Knox), FEMA (Via).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"Seismic event occurred resulting in a Notification of an Unusual Event. No plant impact to either unit. Both units are stable with safety systems functional."

There were no personnel injuries and no reports of structural damage. The licensee has notified the NRC Resident Inspector.

* * * UPDATE FROM DAN WILLIAMSON TO HOWIE CROUCH AT 1819 EDT ON 8/23/11 * * *

"Limerick is terminating from the Unusual Event (HU5) based on the conditions that originally presented entry to the Unusual Event (HU5) no longer exist and it is unlikely that plant conditions will deteriorate. No emergency conditions exist at this time for either unit. Both Unit 1 and Unit 2 are operating at 100% power and are stable. A walk down of the facility has been completed with no deficiencies identified. No indication of system degradation has been detected."

The licensee has notified the NRC Resident Inspector and has notified state and local authorities.

Notified R1 IRC (Dentil), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"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).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

The licensee declared a Notification of Unusual Event under EAL HU1.1 due to seismic activity. There were no reports of personnel injury or significant plant damage.

The licensee has notified the NRC Resident Inspector and state and local authorities.

* * * UPDATE FROM TODD MULFORD TO JOHN KNOKE AT 1842 EDT ON 8/23/11 * * *

The licensee terminated the Notification of Unusual Event at 1825 EDT. The licensee has notified the NRC Resident Inspector and state and local authorities.

Notified R3DO (Passehl), IRD (Morris), FEMA (Via) and DHS (Bean).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

License declared an Unusual Event based on seismic activity.

* * * UPDATE AT 1801 EDT ON 08/23/11 FROM LISA SWEENEY TO JOHN SHOEMAKER * * *

"Oyster Creek has terminated from the Unusual Event for seismic activity.

"Engineering walk downs of reactor building, turbine building, switchyard, emergency diesel generators, intake structure, dilution structure, ISFSI (Independent Spent Fuel Storage Installation), and fire pond were completed and no problems noted.

"All plant conditions remain stable."

Licensee notified the NRC Resident Inspector and applicable state and local authorities. A press release is planned.

Notified R1 IRC (Dentil), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

The licensee declared a Notification of Unusual Event under EAL HU1.1 for seismic activity felt by station personnel. Both units will remain at 100% power. No equipment failures have been identified. No Reactor Coolant System or Steam Generator leakage identified. The licensee will upgrade this event if damage to safety-related equipment is identified.

The plant is accessible. Engineering walkdowns have been initiated in the station, switchyard and intake structures.

The licensee has notified the NRC Resident Inspector and state and local authorities.

* * * UPDATE AT 1752 ON 08/23/11 FROM DAVID BRIDGES TO JOHN SHOEMAKER * * *

License terminated the Unusual Event.

Notified R2 IRC (Franke), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"At 1401 hrs. EDT on 8/23/11, TMI (Three Mile Island) declared an Unusual Event due to a threshold seismic condition (HU5) earthquake. The earthquake was felt at the plant. No equipment damage has been identified."

No personnel injuries were reported. The licensee has notified the NRC Resident Inspector and state and local authorities.

* * * UPDATE FROM JOE SHUFFNER TO JOHN SHOEMAKER AT 1744 EDT ON 8/23/11 * * *

"The Unusual Event declared at 1401 EDT due to the ground motion felt at the site has been terminated at 1730 EDT. Walkdowns have been performed and no equipment damage has been identified. The plant remains in a stable condition at 100% power. Offsite power and diesel generators were verified to be unaffected by the event."

The licensee has notified the NRC Resident Inspector and state and local authorities.

Notified R1 IRC (Dentil), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"On 8/23/11 at 1400 hrs. EDT, Hope Creek and Salem generation stations declared a common site Unusual Event in accordance with EAL 9.5.1.a due to an earthquake felt by onsite personnel within the protected area. The plants are [both] operating at 100% power with no significant anomalies noted. Walkdowns of safety related areas are currently in progress. All ECCS systems are available and in standby alignment."

The licensee has notified the NRC Resident Inspector and state and local authorities. (See also EN #47192).

* * * UPDATE FROM MARK SCHWARTZ TO HOWIE CROUCH AT 1639 EDT ON 8/23/11 * * *

"Walkdowns are in progress and are approximately 40% complete with no anomalies noted. Estimated completion time of 1900 hrs."

The licensee has notified the NRC Resident Inspector. Notified R1 IRC (Dentil).

* * * UPDATE FROM MARK SCHWARTZ TO HOWIE CROUCH AT 1941 EDT ON 8/23/11 * * *

Hope Creek and Salem have terminated their Notification of Unusual Event. The licensee has notified the NRC Resident Inspector and state and local authorities.

Notified R1DO (Krohn), IRD (Morris), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"On 8/23/11 at 1400 hrs. EDT, Hope Creek and Salem generation stations declared a common site Unusual Event in accordance with EAL 9.5.1.a, due to an earthquake felt by onsite personnel within the protected area. The plant is operating at 100% power with no significant anomalies noted. Walkdowns of safety related areas are currently in progress. All ECCS systems are available and in standby alignment."

The licensee has notified the NRC Resident Inspector and state and local authorities. (See also EN #47191).

* * * UPDATE FROM MARK SCHWARTZ TO HOWIE CROUCH AT 1639 EDT ON 8/23/11 * * *

"Initial walkdowns are complete with no anomalies noted. Detailed walkdowns of all rooms and areas are in progress with estimated completion time of 1900 hrs."

The licensee has notified the NRC Resident Inspector. Notified R1 IRC (Dentil).

* * * UPDATE FROM MARK SCHWARTZ TO HOWIE CROUCH AT 1941 EDT ON 8/23/11 * * *

Hope Creek and Salem have terminated their Notification of Unusual Event. The licensee has notified the NRC Resident Inspector and state and local authorities.

Notified R1DO (Krohn), IRD (Morris), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

The licensee declared a Notification of Unusual Event (NOUE) under EAL HU1.1 based on an earthquake felt at the plant with confirmation by the National Earthquake Center. They have made state and local notifications and notified the NRC Resident Inspector.

* * * UPDATE ON 08/23/11 AT 1810 EDT FROM AL BOSTIC TO HOWIE CROUCH * * *

The licensee has terminated from the NOUE at 1757 EDT. The termination basis was that no safety equipment was impacted by the earthquake and walkdowns of plant safety equipment was complete.

The licensee has notified the NRC Resident Inspector and state and local authorities

Notified R2 IRC (Franke), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner).

NOTIFICATION OF AN UNUSUAL EVENT DUE TO A SEISMIC EVENT

"At 1424 [hrs. EDT] on Tuesday, August 23, 2011, an Unusual Event was declared for Unit 1 and Unit 2 based on Emergency Plan criterion N-1, 'Natural of Destructive Phenomena Inside the Protected Area'.

"The Unusual Event was declared following detection of ground motion by persons on site with confirmation based on United States Geological Survey information. Plant operation was not impacted by the event. Site structure and system inspections are in progress in accordance with the Abnormal Operating Procedure for earthquake. No damage has been identified.

"In accordance with Emergency Plan procedures, notifications of Berrien County and State of Michigan were completed. The licensee has notified the NRC Senior Resident Inspector. A follow-up notification will be made after the Unusual Event is terminated.

"This notification is being made in accordance with 10 CFR 50.72 (a)(1)(i) due to declaration of an emergency class. "

* * * UPDATE FROM SCOTT BURNS TO HOWIE CROUCH AT 1543 EDT ON 8/23/11 * * *

"A press release has been issued regarding the seismic event. This notification update is being made in accordance with 10 CFR 50.72 (b)(2)(xi) for news release or notification of other government agency. Notifications were made to the following local media: St. Joseph Herald Palladium, South Bend Tribune, Niles Daily Star, WSJM Radio, WNDU TV, WSBT TV, and WSJV TV. Notification was also made to the Platt News Service.

The licensee has notified the NRC Resident Inspector.

* * * UPDATE FROM SCOTT BURNS TO ERIC SIMPSON AT 1859 EDT ON 8/23/11 * * *

"The Unusual Event due to Seismic Event was terminated at 1723 EDT following an examination of plant systems which revealed no damage due to the seismic event. A press release has been issued regarding the termination of the Unusual Event. This notification update is being made to notify of the Unusual Event termination and also notify of the press release describing the Unusual Event termination in accordance with 10 CFR 50.72 (b)(2)(xi) for news release or notification of other government agency.

The licensee has notified the NRC Resident Inspector and state and local authorities.

Notified R3DO (Passehl), IRD (Gott), DHS (Flinter), FEMA (Via), USDA (Kraus), and DOE (Bailey).

CREFS WAS DECLARED INOPERABLE

"This telephone report is being made in accordance with 10 CFR 50.72(b)(3)(v) as a loss of safety function for a single train safety system. On August 23, 2011 at 1530 CDT, the clevis pin that connects the valve with the air operator was found not fully inserted on the Control Room HVAC Emergency Bypass System Inlet Valve, HV-AO-271 AV. This valve is normally closed and opens in response to a Group 6 isolation signal to align the Control Room Emergency Filtration System) (CREFS) to outside air. A retaining clip at one end of the pin was found to be missing, allowing the pin to partially back out of the clevis. The pin was found engaged with half of the clevis. This condition resulted in declaring CREFS inoperable at 15:30 CDT, and CNS entered LCO 3.7.4 Condition A which requires the CREF system to be restored to OPERABLE status in 7 days. The cause of the displaced clevis pin is under investigation."

The licensee has notified the NRC Resident Inspector.

* * * RETRACTION FROM RANDY KOUBA TO JOE O'HARA AT 1406 EDT ON 9/20/11 * * *

"This notification is being made to retract Event Notification EN# 47195 which reported a loss of safety function for a single train safety system due to the unplanned inoperability of the Control Room Emergency Filtration System (CREFS). CREFS was declared inoperable on August 23, 2011 per LCO 3.7.4 due to finding a clevis pin not fully inserted on the valve operator for the Control Room HVAC Emergency Bypass System Inlet Valve IIV-AOV-271AV. This normally closed valve opens on a Primary Containment Group 6 Isolation signal to align CREFS to outside air. The retaining clip at one end of the pin was found missing which allowed the pin to partially back out of the clevis.

"Cooper Nuclear Station (CNS) recently completed its trouble shooting of the as-found condition of the pin and a subsequent evaluation of its ability to withstand seismic loading. CNS determined that CREFS would have been able to fulfill its safety function. The clevis pin was shown via testing to remain engaged when the valve was stroked. The seismic evaluation showed that the maximum seismic force is less than one-tenth of the estimated force required to remove the pin, and consequently it is not credible that the pin would have become disengaged in a seismic event. CREFS did not lose the ability to perform its safety function."

The NRC Resident Inspector has been notified.

Notified the R4DO (Walker).