Event Notification Report for February 03, 2006
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/02/2006 - 02/03/2006
Power Reactor
Event Number: 42309
Facility: VOGTLE
Region: 2 State: GA
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: STEVE A PHILLIPS
HQ OPS Officer: ARLON COSTA
Region: 2 State: GA
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: STEVE A PHILLIPS
HQ OPS Officer: ARLON COSTA
Notification Date: 02/03/2006
Notification Time: 23:05 [ET]
Event Date: 02/03/2006
Event Time: 21:24 [EST]
Last Update Date: 02/03/2006
Notification Time: 23:05 [ET]
Event Date: 02/03/2006
Event Time: 21:24 [EST]
Last Update Date: 02/03/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
Person (Organization):
RUDOLPH BERNHARD (R2)
RUDOLPH BERNHARD (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Hot Standby | 0 | Hot Standby |
IDENTIFIED RCS PRESSURE BOUNDARY LEAKAGE
"At 2124 hrs on 2/3/06, a containment leak inspection team reported pressure boundary leakage (RCS) at a welded connection on a 3/4" bypass line around the RHR loop suction valve 2HV8701B. Presently the unit is in Mode 3. Preparations are being made to commence cooldown to Mode 5 for repair of the leak.
"Unit 2 was taken from 100% RTP to approximately 30% RTP beginning at 1200 hrs on 2/01/06 for repairs of an EHC leak on the main turbine front standard. The EHC leak was repaired and power ascension to 100 % RTP commenced at 2213 hrs on 2/01/06. Approximately 100 % RTP was reached on 2/3/06 at 0600 hrs.
"Between 1900 hrs on 2/01/06 and 1600 hrs on 2/02/06, radiation monitor 2RE2562A went into Intermediate Alarm for short durations on three different occasions. Due to moving the plant, an accurate RCS leak rate could not be performed.
"A containment entry was performed on the night shift 2/2/06 and again on dayshift 2/3/06. Utilizing a robot and camera, leakage was observed inside the bioshield in the area of RCS Loop #1. The source of the leak on both containment entries was inconclusive. At 1412 hrs on 2/3/06, a shutdown of Unit 2 was initiated to allow further investigation/repair of the leak inside containment.
"Unit 2 was placed in Mode 3 at 1807 hrs on 2/3/06."
See also EN# 42194 for a similar incident.
The licensee notified the NRC Resident Inspector.
"At 2124 hrs on 2/3/06, a containment leak inspection team reported pressure boundary leakage (RCS) at a welded connection on a 3/4" bypass line around the RHR loop suction valve 2HV8701B. Presently the unit is in Mode 3. Preparations are being made to commence cooldown to Mode 5 for repair of the leak.
"Unit 2 was taken from 100% RTP to approximately 30% RTP beginning at 1200 hrs on 2/01/06 for repairs of an EHC leak on the main turbine front standard. The EHC leak was repaired and power ascension to 100 % RTP commenced at 2213 hrs on 2/01/06. Approximately 100 % RTP was reached on 2/3/06 at 0600 hrs.
"Between 1900 hrs on 2/01/06 and 1600 hrs on 2/02/06, radiation monitor 2RE2562A went into Intermediate Alarm for short durations on three different occasions. Due to moving the plant, an accurate RCS leak rate could not be performed.
"A containment entry was performed on the night shift 2/2/06 and again on dayshift 2/3/06. Utilizing a robot and camera, leakage was observed inside the bioshield in the area of RCS Loop #1. The source of the leak on both containment entries was inconclusive. At 1412 hrs on 2/3/06, a shutdown of Unit 2 was initiated to allow further investigation/repair of the leak inside containment.
"Unit 2 was placed in Mode 3 at 1807 hrs on 2/3/06."
See also EN# 42194 for a similar incident.
The licensee notified the NRC Resident Inspector.
Power Reactor
Event Number: 42310
Facility: SAN ONOFRE
Region: 4 State: CA
Unit: [] [2] [3]
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: JEFF ROTTON
Region: 4 State: CA
Unit: [] [2] [3]
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: JEFF ROTTON
Notification Date: 02/04/2006
Notification Time: 00:46 [ET]
Event Date: 02/03/2006
Event Time: 18:15 [PST]
Last Update Date: 02/04/2006
Notification Time: 00:46 [ET]
Event Date: 02/03/2006
Event Time: 18:15 [PST]
Last Update Date: 02/04/2006
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):
MIKE RUNYAN (R4)
MIKE RUNYAN (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Refueling | 0 | Refueling |
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE POWER NOT WITHIN SPECIFICATIONS
"On February 3, 2006, at about 1646 PST the Devers-Palo Verde line relayed. This required an evaluation of grid nomograms for San Onofre. At about 1815 PST, the Grid Control Center (GCC) notified San Onofre that the grid nomograms predicted offsite power would not be within limits if San Onofre Unit 3 were to trip (San Onofre Unit 2 is currently shutdown in a refueling outage and Unit 3 is operating at about 100 percent power). Plant Operators declared offsite power inoperable at about 1815 PST.
"At about 1843 PST, the GCC notified San Onofre that the grid operator added generation to the grid and that offsite power was within nomogram limits. Plant Operators declared offsite power operable at that time. Consistent with the guidance provided in NUREG-1022, Rev. 2, Southern California Edison is reporting this event in accordance with 10CFR50.72(b)(3)(v)(D).
"All four San Onofre diesel generators (two per Unit) remained operable during this event. The San Onofre Senior Resident Inspector has been notified of this event and will be provided with a copy of this report."
"On February 3, 2006, at about 1646 PST the Devers-Palo Verde line relayed. This required an evaluation of grid nomograms for San Onofre. At about 1815 PST, the Grid Control Center (GCC) notified San Onofre that the grid nomograms predicted offsite power would not be within limits if San Onofre Unit 3 were to trip (San Onofre Unit 2 is currently shutdown in a refueling outage and Unit 3 is operating at about 100 percent power). Plant Operators declared offsite power inoperable at about 1815 PST.
"At about 1843 PST, the GCC notified San Onofre that the grid operator added generation to the grid and that offsite power was within nomogram limits. Plant Operators declared offsite power operable at that time. Consistent with the guidance provided in NUREG-1022, Rev. 2, Southern California Edison is reporting this event in accordance with 10CFR50.72(b)(3)(v)(D).
"All four San Onofre diesel generators (two per Unit) remained operable during this event. The San Onofre Senior Resident Inspector has been notified of this event and will be provided with a copy of this report."