Event Notification Report for April 28, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/27/2010 - 04/28/2010
EVENT NUMBERS
45879
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 45879
Facility: PILGRIM
Region: 1 State: MA
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: JOHN OHRENBERGER
HQ OPS Officer: JOHN KNOKE
Region: 1 State: MA
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: JOHN OHRENBERGER
HQ OPS Officer: JOHN KNOKE
Notification Date: 04/28/2010
Notification Time: 19:40 [ET]
Event Date: 04/28/2010
Event Time: 14:00 [EDT]
Last Update Date: 05/28/2010
Notification Time: 19:40 [ET]
Event Date: 04/28/2010
Event Time: 14:00 [EDT]
Last Update Date: 05/28/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
JOHN ROGGE (R1DO)
JOHN ROGGE (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
RCIC DECLARED INOPERABLE DUE TO OIL LEAK ON GOVERNOR SYSTEM
"On 04/28/10, at 1400 EDT, with the reactor at 100% power, the Reactor Core Isolation Cooling (RCIC) system was declared inoperable by the Shift Manager (SM) due to an oil leak on the RCIC governor control oil system that could have impacted the system performance during the accredited 24 hour mission time. The fitting where the oil leakage was observed was tightened and the machine was placed in service with no leakage identified. Currently the system is operable and in its normal standby lineup. The system was available for use during this time. At no time was there an impact to the health and safety of the public."
The licensee has notified the NRC Resident Inspector.
* * * RETRACTION FROM JOHN WHALLEY TO HOWIE CROUCH @ 1300 EDT ON 5/28/10 * * *
"On April 28, 2010, at 1940 hours, Pilgrim Nuclear Power Station (PNPS) made an 8-hour non-emergency 50.72 notification, Event Notification EN# 45879. The notification was made in accordance with 50.72 (b)(3)(v)(D), Accident Mitigation. Earlier on April 28, 2010, at 1400 hours, a minor oil leak had been identified on the Reactor Core Isolation Cooling (RCIC) system at a lubricating oil vent fitting. The leak was immediately repaired by properly tightening the fitting, then running RCIC to verify no active leak existed. However in the interim, the Shift Manager conservatively declared RCIC inoperable when the high standard for operability could not be assured by initial system engineering judgment for the impact of the oil leak on RCIC system performance in consideration of mission time.
"Subsequent engineering evaluation concluded that the observed leak, conservatively assumed to be one drop per 3 minutes, would not have impacted RCIC operability for the duration of its required 24 hour mission time. All relevant technical information is documented in the PNPS corrective action system.
"Therefore PNPS is retracting the event notification EN# 45879. The USNRC Resident Inspector Office has been notified of this retraction."
Notified R1DO (Dwyer).
"On 04/28/10, at 1400 EDT, with the reactor at 100% power, the Reactor Core Isolation Cooling (RCIC) system was declared inoperable by the Shift Manager (SM) due to an oil leak on the RCIC governor control oil system that could have impacted the system performance during the accredited 24 hour mission time. The fitting where the oil leakage was observed was tightened and the machine was placed in service with no leakage identified. Currently the system is operable and in its normal standby lineup. The system was available for use during this time. At no time was there an impact to the health and safety of the public."
The licensee has notified the NRC Resident Inspector.
* * * RETRACTION FROM JOHN WHALLEY TO HOWIE CROUCH @ 1300 EDT ON 5/28/10 * * *
"On April 28, 2010, at 1940 hours, Pilgrim Nuclear Power Station (PNPS) made an 8-hour non-emergency 50.72 notification, Event Notification EN# 45879. The notification was made in accordance with 50.72 (b)(3)(v)(D), Accident Mitigation. Earlier on April 28, 2010, at 1400 hours, a minor oil leak had been identified on the Reactor Core Isolation Cooling (RCIC) system at a lubricating oil vent fitting. The leak was immediately repaired by properly tightening the fitting, then running RCIC to verify no active leak existed. However in the interim, the Shift Manager conservatively declared RCIC inoperable when the high standard for operability could not be assured by initial system engineering judgment for the impact of the oil leak on RCIC system performance in consideration of mission time.
"Subsequent engineering evaluation concluded that the observed leak, conservatively assumed to be one drop per 3 minutes, would not have impacted RCIC operability for the duration of its required 24 hour mission time. All relevant technical information is documented in the PNPS corrective action system.
"Therefore PNPS is retracting the event notification EN# 45879. The USNRC Resident Inspector Office has been notified of this retraction."
Notified R1DO (Dwyer).