Event Notification Report for May 19, 2012
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/18/2012 - 05/19/2012
EVENT NUMBERS
48082
Power Reactor
Event Number: 48082
Facility: BROWNS FERRY
Region: 2 State: AL
Unit: [] [] [3]
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: DAVID RENN
HQ OPS Officer: HOWIE CROUCH
Region: 2 State: AL
Unit: [] [] [3]
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: DAVID RENN
HQ OPS Officer: HOWIE CROUCH
Notification Date: 07/10/2012
Notification Time: 14:37 [ET]
Event Date: 05/19/2012
Event Time: 00:06 [CDT]
Last Update Date: 07/10/2012
Notification Time: 14:37 [ET]
Event Date: 05/19/2012
Event Time: 00:06 [CDT]
Last Update Date: 07/10/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
Person (Organization):
ALAN BLAMEY (R2DO)
ALAN BLAMEY (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | N | 0 | Cold Shutdown | 0 | Cold Shutdown |
60-DAY OPTIONAL TELEPHONIC NOTIFICATION OF INVALID SPECIFIED SYSTEM ACTUATION
"This 60-day telephone notification is being made in accordance with the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid actuation of a general containment isolation signal affecting more than one system.
"On May 19, 2012, at 0006 hours Central Daylight Time (CDT), two fuses were inadvertently contacted with a spiral notebook in panel 9-42 of the auxiliary instrument room. The two blown fuses resulted in a Primary Containment Isolation System (PCIS) partial Group 6 isolation. The partial Group 6 isolation caused the initiation of Standby Gas Treatment subsystems 'A' and 'C', the initiation of Control Room Emergency Ventilation subsystem 'A', and the isolation of the inboard Group 6 valves and ventilation dampers.
"Plant conditions which initiate PCIS Group 6 actuations are Reactor Vessel Low Water Level (Level 3), High Drywell Pressure, and Reactor Building Ventilation Exhaust High Radiation. At the time of the event, these conditions did not exist; therefore, the partial actuations were invalid.
"The affected equipment responded as designed. On May 19, 2012, at 0130 hours CDT, Operations personnel reset the partial Group 6 isolation.
"There were no safety consequences or impact on the health and safety of the public as a result of these events.
"This event was entered into the Corrective Action Program as Problem Evaluation Report 554165.
"The NRC Resident Inspector has been notified of this event."
"This 60-day telephone notification is being made in accordance with the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid actuation of a general containment isolation signal affecting more than one system.
"On May 19, 2012, at 0006 hours Central Daylight Time (CDT), two fuses were inadvertently contacted with a spiral notebook in panel 9-42 of the auxiliary instrument room. The two blown fuses resulted in a Primary Containment Isolation System (PCIS) partial Group 6 isolation. The partial Group 6 isolation caused the initiation of Standby Gas Treatment subsystems 'A' and 'C', the initiation of Control Room Emergency Ventilation subsystem 'A', and the isolation of the inboard Group 6 valves and ventilation dampers.
"Plant conditions which initiate PCIS Group 6 actuations are Reactor Vessel Low Water Level (Level 3), High Drywell Pressure, and Reactor Building Ventilation Exhaust High Radiation. At the time of the event, these conditions did not exist; therefore, the partial actuations were invalid.
"The affected equipment responded as designed. On May 19, 2012, at 0130 hours CDT, Operations personnel reset the partial Group 6 isolation.
"There were no safety consequences or impact on the health and safety of the public as a result of these events.
"This event was entered into the Corrective Action Program as Problem Evaluation Report 554165.
"The NRC Resident Inspector has been notified of this event."