Event Notification Report for December 31, 2000
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/30/2000 - 12/31/2000
EVENT NUMBERS
37641
Power Reactor
Event Number: 37641
Facility: SAN ONOFRE
Region: 4 State: CA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: STEVE SANDIN
Region: 4 State: CA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: STEVE SANDIN
Notification Date: 12/31/2000
Notification Time: 06:33 [ET]
Event Date: 12/31/2000
Event Time: 01:30 [PST]
Last Update Date: 12/31/2000
Notification Time: 06:33 [ET]
Event Date: 12/31/2000
Event Time: 01:30 [PST]
Last Update Date: 12/31/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
Person (Organization):
CHARLES MARSCHALL (R4)
CHARLES MARSCHALL (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
MANUAL ACTUATION OF CONTAINMENT EMERGENCY COOLER UNITS
"On December 31, 2000, at about 0130 PST, containment normal cooler unit ME201 tripped on indicated high temperature (cause under investigation). During preparations to start the opposite train containment normal cooler Unit (ME202), in response to the expected slow increase in containment temperature, Operators manually started the 4 containment emergency cooler units (an engineered safety features system). At about 0220 PST Operators started normal cooler unit ME202 and stopped the 4 ECUs. Consistent with the guidance provided in NUREG-1022, Rev 1, SCE is reporting this occurrence in accordance with 10CFR50.72(b)(2)(ii) for a manual start of an ESF component.
"At the time of this occurrence Unit 2 was operating at about 100% power, Unit 3 was operating at about 85% power; and Unit 1 remains permanently defueled. SCE will notify the NRC resident inspectors about this occurrence and will provide them a copy of this report."
"On December 31, 2000, at about 0130 PST, containment normal cooler unit ME201 tripped on indicated high temperature (cause under investigation). During preparations to start the opposite train containment normal cooler Unit (ME202), in response to the expected slow increase in containment temperature, Operators manually started the 4 containment emergency cooler units (an engineered safety features system). At about 0220 PST Operators started normal cooler unit ME202 and stopped the 4 ECUs. Consistent with the guidance provided in NUREG-1022, Rev 1, SCE is reporting this occurrence in accordance with 10CFR50.72(b)(2)(ii) for a manual start of an ESF component.
"At the time of this occurrence Unit 2 was operating at about 100% power, Unit 3 was operating at about 85% power; and Unit 1 remains permanently defueled. SCE will notify the NRC resident inspectors about this occurrence and will provide them a copy of this report."