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Event Notification Report for March 11, 2011

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
03/10/2011 - 03/11/2011

EVENT NUMBERS
46668

Power Reactor
Event Number: 46668
Facility: DIABLO CANYON
Region: 4     State: CA
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: K.R.THOMPSON
HQ OPS Officer: JOE O'HARA
Notification Date: 03/11/2011
Notification Time: 04:40 [ET]
Event Date: 03/11/2011
Event Time: 01:23 [PST]
Last Update Date: 03/11/2011
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
Person (Organization):
THOMAS FARNHOLTZ (R4DO)
JANE MARSHALL (IRD)
ELMO COLLINS (RA)
JACK GROBE (NRR)
JONES (DHS)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
2 N Y 100 Power Operation 100 Power Operation
Event Text
NOTICE OF UNUSUAL EVENT AS A RESULT OF A TSUNAMI WARNING IN THE AREA

The licensee declared a notice of unusual event as a result of a tsunami warning issued for the coastal areas of California. The tsunami warning is a result of a 8.9 magnitude earthquake off the coast of Japan. The licensee is in EAL HU1.5, 'Tsunami Affecting the Protected Area.' The NRC remains in the normal response mode.

The NRC Resident Inspector has been notified.

* * * UPDATE AT 1134 EST ON 3/11/2011 FROM MIKE QUITTER TO JOE O'HARA * * *

"A classification of unusual event was declared at 0123 PST on March 11, 2011 due to a tsunami warning issued by the NOAA for the California West Coast. Diablo Canyon Power Plant [DCPP] has implemented the requirements of Casualty Procedure M-5, 'Response to Tsunami Warning.' Plant personnel were evacuated from the DCPP intake structure at 0742 PST. Evacuation of personnel from the intake structure constitutes a deviation from DCPP license condition '2.E' and authorized pursuant to 10CFR50.54(x).

"No damage or injuries has been observed as a result of this tsunami event and there is no impact on the health and safety of the general public."

Notified the R4DO (Farnholtz), R4RA (Collins), IRD (Marshall), and NRR (Grobe).

* * * UPDATE AT 1843 EST ON 3/11/2011 FROM JOHN BECERRA TO MARK ABRAMOVITZ * * *

Diablo Canyon has terminated their Unusual Event at 1528 PST because the tsunami warning has been reduced to a tsunami advisory. No damage occurred during this event.

Notified the R4DO (Farnholtz), IRD (Gott), NRR (Galloway), DHS (Gates), and FEMA (O'Connell)