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Event Notification Report for January 5, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
01/02/2015 - 01/05/2015

** EVENT NUMBERS **


50713 50714 50715

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Power Reactor Event Number: 50713
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [1] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: DANNY BRADFORD
HQ OPS Officer: VINCE KLCO
Notification Date: 01/02/2015
Notification Time: 11:43 [ET]
Event Date: 01/02/2015
Event Time: 03:14 [CST]
Last Update Date: 01/02/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
MICHAEL HAY (R4DO)

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 METEOROLOGICAL EMERGENCY ASSESSMENT CAPABILITY

"At 0314 [CST] on 01/02/2015, a partial loss of the 25KV Power Distribution Systems caused a loss of both the Primary and Backup Meteorological Towers at the Comanche Peak Nuclear Power Plant. This resulted in a major loss of emergency assessment capabilities in regard to meteorological conditions.

"The 25 KV Plant Support Power Loop feeds certain non-safety-related equipment and does not affect plant operation.

"An investigation by Meter and Relay Technicians revealed no abnormal conditions/damaged equipment. The supply breaker was re-closed at 0915 on 01/02/2015. Power was restored to both Meteorological Towers and proper operation was verified."

The licensee notified the NRC Resident Inspector.

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Power Reactor Event Number: 50714
Facility: TURKEY POINT
Region: 2 State: FL
Unit: [ ] [4] [ ]
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: DIRK DRINKARD
HQ OPS Officer: VINCE KLCO
Notification Date: 01/02/2015
Notification Time: 16:45 [ET]
Event Date: 01/02/2015
Event Time: 09:25 [EST]
Last Update Date: 01/02/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
GEORGE HOPPER (R2DO)

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

Event Text

HIGH HEAD SAFETY INJECTION INOPERABLE DUE TO VOIDS IDENTIFIED IN PIPING

"At 0925 [EST] on 1/2/2015, Engineering personnel identified a gas void in each of two Unit 4 cold leg High Head Safety Injection (HHSI) discharge lines which exceeded procedural gas accumulation acceptance criteria. This condition rendered the cold leg HHSI flow path inoperable and required entry into Technical Specification 3.0.3. The voids were vented and Technical Specification (TS) 3.0.3 was exited at 1032.

"The testing for gas voids conducted on 1/2/2015 was a follow-up to a gas void found in one Unit 4 HHSI line on 12/26/2014. On 12/26/14, TS 3.0.3 was entered at 1020 and exited at 1048 after the gas void was vented. After further review, the 12/26/2014 event was also reportable in accordance with 10 CFR 50.72(b)(3)(v)(D).

"Engineering evaluation will be performed for both events to determine the specific impact of the gas voids on HHSI system function. Cause evaluation is being conducted to determine the source of the gas and any needed corrective actions."

Unit 3 was verified to not have this voiding issue.

The licensee notified the NRC Resident Inspector.

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Power Reactor Event Number: 50715
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [1] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: SAMUEL PEREZ
HQ OPS Officer: VINCE KLCO
Notification Date: 01/03/2015
Notification Time: 14:14 [ET]
Event Date: 01/03/2015
Event Time: 05:38 [CST]
Last Update Date: 01/03/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
MICHAEL HAY (R4DO)

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 METEOROLOGICAL EMERGENCY ASSESSMENT CAPABILITY

"At 0538 [CST] on 01/03/2015, a partial loss of the 25KV Power Distribution System caused a loss of both the Primary and Backup Meteorological Towers at the Comanche Peak Nuclear Power Plant. This resulted in a major loss of emergency assessment capabilities in regard to meteorological conditions.

"The 25KV Plant Support Power Loop feeds certain non-safety-related support equipment and did not result in an impact to plant/unit operation.

"Meter and Relay technicians are performing ongoing investigation of the cause of the breaker trip.

"A similar incident occurred 01/02/2015 at 0314 [CST]. Reference [NRC] EN# 50713."

The licensee will notify the NRC Resident Inspector.

Page Last Reviewed/Updated Monday, January 05, 2015
Monday, January 05, 2015