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Event Notification Report for January 3, 2005

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
12/30/2004 - 01/03/2005

** EVENT NUMBERS **


41301 41302 41304

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Power Reactor Event Number: 41301
Facility: SAINT LUCIE
Region: 2 State: FL
Unit: [ ] [2] [ ]
RX Type: [1] CE,[2] CE
NRC Notified By: DAVE WILLIAMS
HQ OPS Officer: MIKE RIPLEY
Notification Date: 12/31/2004
Notification Time: 02:03 [ET]
Event Date: 12/30/2004
Event Time: 23:55 [EST]
Last Update Date: 12/31/2004
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
JAMES MOORMAN (R2)
SMITH (DOE)
CREWS (EPA)
TIMMONS (USDA)
PEASLER (HHS)
BISCOE (FEMA)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N N 0 Hot Standby 0 Hot Standby

Event Text

HYDRAZINE RELEASE TO SETTLING POND EXCEEDED ALLOWED RELEASE RATE

"At 2355 on 12/30/04, the National Response Center was notified that the environmental release limit for hydrazine had been exceeded. A maximum of 3.8 pounds of hydrazine was released over an 8 hour period which exceeded the reportable quantity of one pound in 24 hours. A feed and bleed of the condensate system was in progress in preparation for plant startup. The release limit was exceeded due to a higher than expected concentration of hydrazine in the condensate system. The cause of the event is under investigation. The hydrazine addition was secured and draining of the system has been terminated. All of the hydrazine has been contained in a settling pond within the protected area."

The licensee notified the NRC Resident Inspector.

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Power Reactor Event Number: 41302
Facility: DIABLO CANYON
Region: 4 State: CA
Unit: [1] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: JOY SKAGGS
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/31/2004
Notification Time: 06:27 [ET]
Event Date: 12/31/2004
Event Time: 03:15 [PST]
Last Update Date: 12/31/2004
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
TOM FARNHOLTZ (R4)

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

LOSS OF EMERGENCY NOTIFICATION SIRENS

"Loss of 21 emergency notification sirens due to a loss of power. A rain storm in San Luis Obispo county resulted in a loss of a local substation. This substation supplies power to 21 of [over 400] emergency sirens. Investigation and repair of the substation is in progress."

This siren outage eliminates emergency notification siren coverage in one specific area. The local sheriff department has been notified to implement alternate notification protocols until the sirens in that area are operable. The licensee will notify the NRC Resident Inspector.

* * * UPDATE FROM DIABLO CANYON (J. WELSCH) TO M. RIPLEY 0945 EST 12/31/04 * * *

Power was restored to the substation and the 21 affected emergency notification sirens have been returned to service.

The licensee will notify the NRC Resident Inspector. Notified R4 DO (T. Farnholtz).

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Power Reactor Event Number: 41304
Facility: PALO VERDE
Region: 4 State: AZ
Unit: [ ] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: BRAD ROBINSON
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 12/31/2004
Notification Time: 15:15 [ET]
Event Date: 12/31/2004
Event Time: 10:42 [MST]
Last Update Date: 12/31/2004
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
TOM FARNHOLTZ (R4)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N Y 100 Power Operation 100 Power Operation
3 N Y 100 Power Operation 100 Power Operation

Event Text

PLANT HAD AUTO START AND LOADING OF TWO EMERGENCY DIESEL GERERATORS

"On December 31, 2004, at approximately 10:42 Mountain Standard Time (MST) a valid actuation of the Palo Verde Nuclear Generating Station Unit 2 Train A Emergency Diesel Generator (EDG) and Unit 3 Train B EDG occurred as a result of undervoltage on their respective safety buses. Both EDGs started and loaded as designed.

"The loss of power to the two safety buses was the result of the deenergization of Startup Transformer X01 when Westwing transmission line #2, one of seven 525 kV transmission lines at the Palo Verde switchyard, relayed off. Prior to the event, maintenance and testing were in progress on Westwing Line #1. The apparent cause of the event was inadvertent operation of an adjacent Line #2 protective relay while testing Line #1.

"Both Units 2 and 3 entered Technical Specification LCO 3.8.1 Condition A for one (of two) required offsite circuits inoperable. Normal offsite power was restored to each safety bus in Units 2 and 3 (at 11:45 MST), the LCO exited and the Unit 3 EDG returned to standby. During shutdown of the Unit 2 A EDG following successful loading of the Safety bus, the EDG was declared inoperable due to a Jacket Water leak and LCO 3.8.1 Condition B was entered. No Emergency Plan declaration was made and none was required.

"Both units were at approximately 100% power, at normal operating temperature and pressure prior to and following the EDG actuations. No other ESF actuations occurred and none were required. No major equipment was inoperable prior to the event that contributed to the event. The event did not result in any challenges to fission product barriers and there were no adverse safety consequences as a result of this event. The event did not adversely affect the safe operation of the plant or the health and safety of the public.

"The NRC Resident Inspector has been notified of the ESF actuation and this ENS notification."

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