Event Notification Report for May 04, 2008
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/03/2008 - 05/04/2008
EVENT NUMBERS
44186
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 44186
Facility: BROWNS FERRY
Region: 2 State: AL
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: TODD BOHANAN
HQ OPS Officer: BILL HUFFMAN
Region: 2 State: AL
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: TODD BOHANAN
HQ OPS Officer: BILL HUFFMAN
Notification Date: 05/04/2008
Notification Time: 22:14 [ET]
Event Date: 05/04/2008
Event Time: 15:30 [CDT]
Last Update Date: 06/30/2008
Notification Time: 22:14 [ET]
Event Date: 05/04/2008
Event Time: 15:30 [CDT]
Last Update Date: 06/30/2008
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
Person (Organization):
CAROLYN EVANS (R2)
CAROLYN EVANS (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
HPCI DECLARED INOPERABLE
"During the required quarterly oil sample taken following scheduled flow rate surveillance, the Unit 2 HPCI oil system was found to contain excessive amounts of water. HPCI declared inoperable.
"This event is reportable under 10CFR50.72(b)(3)(v)(B), 'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to remove residual heat.'
"Unit 2 remains at 100% power
"14 day TS LCO 3.5.1 has been entered and troubleshooting is in progress.
"NRC Resident has been notified."
* * * RETRACTION PROVIDED AT 1648 ON 06/30/08 FROM MICHAEL HUNTER TO JEFF ROTTON * * *
"ENS Event Number 44186, made on May 4, 2008, is being retracted."
"NRC Notification 44186 was conservatively made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met when a required quarterly oil sample taken following a flow rate surveillance on the Unit 2 High Pressure Coolant Injection (HPCI) System indicated that the turbine oil system contained excessive amounts of water.
"An evaluation performed in response to this report concluded that the HPCI System was capable of performing its intended safety function even though the turbine oil system contained more water than recommended in the TVA Lubrication Oil Analysis and Monitoring Program. TVA found through visual inspection and engineering evaluation that the amount of water contained in the turbine oil system would not impact the HPCI operation during its' mission time for the Design Basis Loss-of-Coolant Accident.
"As such, the circumstances discussed in the report did not result in any condition that at the time of discovery could have prevented the fulfillment of the safety function of structures of system that are needed to remove residual heat. Thus, there was no impact on nuclear safety. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v)(B).
"TVA's evaluation of this event notification is documented in the corrective action program.
"The licensee has notified the NRC Resident Inspector."
The licensee has changed the oil and continues to monitor the oil reservoir monthly until the problem causing the excessive water (Turbine Admission valve) is corrected .
Notified R2DO (O'Donohue)
"During the required quarterly oil sample taken following scheduled flow rate surveillance, the Unit 2 HPCI oil system was found to contain excessive amounts of water. HPCI declared inoperable.
"This event is reportable under 10CFR50.72(b)(3)(v)(B), 'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to remove residual heat.'
"Unit 2 remains at 100% power
"14 day TS LCO 3.5.1 has been entered and troubleshooting is in progress.
"NRC Resident has been notified."
* * * RETRACTION PROVIDED AT 1648 ON 06/30/08 FROM MICHAEL HUNTER TO JEFF ROTTON * * *
"ENS Event Number 44186, made on May 4, 2008, is being retracted."
"NRC Notification 44186 was conservatively made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met when a required quarterly oil sample taken following a flow rate surveillance on the Unit 2 High Pressure Coolant Injection (HPCI) System indicated that the turbine oil system contained excessive amounts of water.
"An evaluation performed in response to this report concluded that the HPCI System was capable of performing its intended safety function even though the turbine oil system contained more water than recommended in the TVA Lubrication Oil Analysis and Monitoring Program. TVA found through visual inspection and engineering evaluation that the amount of water contained in the turbine oil system would not impact the HPCI operation during its' mission time for the Design Basis Loss-of-Coolant Accident.
"As such, the circumstances discussed in the report did not result in any condition that at the time of discovery could have prevented the fulfillment of the safety function of structures of system that are needed to remove residual heat. Thus, there was no impact on nuclear safety. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v)(B).
"TVA's evaluation of this event notification is documented in the corrective action program.
"The licensee has notified the NRC Resident Inspector."
The licensee has changed the oil and continues to monitor the oil reservoir monthly until the problem causing the excessive water (Turbine Admission valve) is corrected .
Notified R2DO (O'Donohue)