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Event Notification Report for December 14, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
12/11/2015 - 12/14/2015

** EVENT NUMBERS **


51599 51600 51601

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Power Reactor Event Number: 51599
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: JACK MCCOY
HQ OPS Officer: DONG HWA PARK
Notification Date: 12/11/2015
Notification Time: 02:30 [ET]
Event Date: 08/03/2015
Event Time: 15:30 [CST]
Last Update Date: 12/11/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
BOB HAGAR (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

Event Text

OFFSITE NOTIFICATION FOR CONDENSATE SPILL IN THE TURBINE BUILDING

"On August 1, 2015, during tagging activities to support planned maintenance on a condensate demineralizer, operators incorrectly positioned certain air-operated components which, combined with apparent leakage past a solenoid valve, resulted in a drain opening on a demineralizer that was in service. Flow through the drain line caused a turbine building sump to overflow to the floor of the 67 foot elevation of the Turbine Building. Immediate actions were taken to stop the leak.

"The spill volume was approximately 60,000 gallons of condensate. The tritium activity of the water is estimated at 1.32E-2 microCi/ml. Gamma activity was from noble gases only in a concentration of approximately 2.30E-6 microCi/ml. The spill was confined to the Turbine Building. The affected area contains degraded floor seals which might allow the spill to reach groundwater.

"The reason for this notification is that industry and governmental officials were notified of this event on August 3, 2015. The NRC Senior Resident Inspector was notified and informal notification was made to the NRC Region IV office, the Louisiana Department of Environmental Quality, and West Feliciana Parish government authorities. The Nuclear Energy Institute was informed as specified in their ground water protection initiative.

"Plant cleanup activities arising from the spill are complete."

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Power Reactor Event Number: 51600
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: DAN PIPKIN
HQ OPS Officer: DONG HWA PARK
Notification Date: 12/11/2015
Notification Time: 11:28 [ET]
Event Date: 12/11/2015
Event Time: 04:16 [CST]
Last Update Date: 12/11/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
BOB HAGAR (R4DO)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 83 Power Operation 83 Power Operation

Event Text

HIGH PRESSURE CORE SPRAY DECLARED INOPERABLE

"At 0416 [CST] on 12-11-2015, River Bend Station declared the High Pressure Core Spray system INOPERABLE in accordance with Technical Specification 3.8.9, Condition E (Declare High Pressure Core Spray System and Standby Service Water System Pump 2C inoperable immediately) due to Division 2 Control Room Air Conditioning System HVK-CHL1D tripping off because of high inboard bearing temperature of 180 deg F.

"Actions taken to exit LCO: Alternated divisions of Control Room Air Conditioning System to Division 1 HVK-CHL1C in service and Division 2 HVK-CHL1B in standby and exited LCO at 0439."

The licensee has notified the NRC Resident Inspector.

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Power Reactor Event Number: 51601
Facility: HARRIS
Region: 2 State: NC
Unit: [1] [ ] [ ]
RX Type: [1] W-3-LP
NRC Notified By: KATE COLIAS
HQ OPS Officer: DANIEL MILLS
Notification Date: 12/13/2015
Notification Time: 10:41 [ET]
Event Date: 12/13/2015
Event Time: 03:07 [EST]
Last Update Date: 12/13/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
EUGENE GUTHRIE (R2DO)

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

Event Text

ESSENTIAL SERVICES CHILLED WATER SYSTEM INOPERABLE

"This is a non-emergency eight hour notification for a condition that could have prevented fulfillment of a safety function in a system needed to remove decay heat and to mitigate the consequences of an accident.

"At approximately 0307 EST on December 13, 2015, the 'A' and 'B' trains of the essential services chilled water (ESCW) system were inoperable for a time period of 23 minutes. The 'B' train of the ESCW system was being tested at the time that the 'A' train of the ESCW system became inoperable. The 'B' train of the ESCW system was returned to operable status at approximately 0330 EST and remains operable.

"The ESCW system provides cooling support functions to remove decay heat and mitigate the consequences of an accident. There were no safety system actuations during this time period and the plant is stable.

"This condition does not affect the health and safety of the public or station employees. The NRC Resident Inspector has been notified."

The 'A' ESCW pump tripped on low lube oil pressure.

Page Last Reviewed/Updated Monday, December 14, 2015
Monday, December 14, 2015