Event Notification Report for February 24, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/23/2010 - 02/24/2010
EVENT NUMBERS
45724
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 45724
Facility: FT CALHOUN
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: JOHN MUSSER
HQ OPS Officer: PETE SNYDER
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: JOHN MUSSER
HQ OPS Officer: PETE SNYDER
Notification Date: 02/24/2010
Notification Time: 18:10 [ET]
Event Date: 02/24/2010
Event Time: 11:40 [CST]
Last Update Date: 02/25/2010
Notification Time: 18:10 [ET]
Event Date: 02/24/2010
Event Time: 11:40 [CST]
Last Update Date: 02/25/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION 50.72(b)(3)(v)(B) - POT RHR INOP
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION 50.72(b)(3)(v)(B) - POT RHR INOP
Person (Organization):
RYAN LANTZ (R4DO)
RYAN LANTZ (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 |
AUXILIARY FEEDWATER PUMPS MAY EXPERIENCE RUNOUT AT LOW STEAM PRESSURES
"At 1140 CST, both of the stations safety related auxiliary feedwater (AFW) pumps were declared inoperable. The AFW pumps were declared inoperable due to an evaluation that determined that the pumps may experience runout at low steam generator pressures during some design basis events. The stations Technical Specifications require that: 'With both AFW trains inoperable, then initiate actions to restore one AFW train to OPERABLE status immediately.' Technical Specification (TS) 2.0.1 and all TS actions requiring MODE change are suspended until one AFW train is restored to OPERABLE status.
"The station is aggressively working to develop a solution to return at least one train of the AFW system to operability."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM DAVID SPARGO TO PETE SNYDER AT 2323 ON 2/24/10 * * *
"At 2133 CST, Steam Driven Auxiliary Feedwater Pump, FW-10, was declared operable based on an engineering evaluation that determined FW-10 will perform as required under all design basis conditions.
"Motor Driven Auxiliary Feedwater Pump, FW-6, remains inoperable. [The licensee] exited Technical Specification 2.0.1 and 2.5(1)D, and entered TS 2.5(1)B, 24 hour LCO, effective as of 1140 CST."
The licensee notified the NRC Resident Inspector. Notified R4DO (Lantz).
* * * UPDATE FROM DAVID SPARGO TO DONALD NORWOOD AT 0435 ON 2/25/10 * * *
At 0238 CST, Motor Driven Auxiliary Feedwater Pump, FW-6, was declared operable per an Engineering Operability Evaluation. [The licensee] exited Technical Specification 2.5(1)B.
The licensee notified the NRC Resident Inspector. Notified R4DO (Lantz).
* * * RETRACTION FROM ERICK MATZKE TO JOE O'HARA AT 1625 EST ON 2/25/10 * * *
"Further review has determined that the auxiliary feedwater pumps are and have been fully capable of performing their required safety function. Therefore, this notification is being retracted."
The licensee notified the NRC Resident Inspector. Notified R4DO(Lantz)
"At 1140 CST, both of the stations safety related auxiliary feedwater (AFW) pumps were declared inoperable. The AFW pumps were declared inoperable due to an evaluation that determined that the pumps may experience runout at low steam generator pressures during some design basis events. The stations Technical Specifications require that: 'With both AFW trains inoperable, then initiate actions to restore one AFW train to OPERABLE status immediately.' Technical Specification (TS) 2.0.1 and all TS actions requiring MODE change are suspended until one AFW train is restored to OPERABLE status.
"The station is aggressively working to develop a solution to return at least one train of the AFW system to operability."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM DAVID SPARGO TO PETE SNYDER AT 2323 ON 2/24/10 * * *
"At 2133 CST, Steam Driven Auxiliary Feedwater Pump, FW-10, was declared operable based on an engineering evaluation that determined FW-10 will perform as required under all design basis conditions.
"Motor Driven Auxiliary Feedwater Pump, FW-6, remains inoperable. [The licensee] exited Technical Specification 2.0.1 and 2.5(1)D, and entered TS 2.5(1)B, 24 hour LCO, effective as of 1140 CST."
The licensee notified the NRC Resident Inspector. Notified R4DO (Lantz).
* * * UPDATE FROM DAVID SPARGO TO DONALD NORWOOD AT 0435 ON 2/25/10 * * *
At 0238 CST, Motor Driven Auxiliary Feedwater Pump, FW-6, was declared operable per an Engineering Operability Evaluation. [The licensee] exited Technical Specification 2.5(1)B.
The licensee notified the NRC Resident Inspector. Notified R4DO (Lantz).
* * * RETRACTION FROM ERICK MATZKE TO JOE O'HARA AT 1625 EST ON 2/25/10 * * *
"Further review has determined that the auxiliary feedwater pumps are and have been fully capable of performing their required safety function. Therefore, this notification is being retracted."
The licensee notified the NRC Resident Inspector. Notified R4DO(Lantz)