Event Notification Report for February 17, 2018
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/16/2018 - 02/17/2018
EVENT NUMBERS
53219
Power Reactor
Event Number: 53219
Facility: LASALLE
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: TERRY MARTIN
HQ OPS Officer: JEFF HERRERA
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: TERRY MARTIN
HQ OPS Officer: JEFF HERRERA
Notification Date: 02/17/2018
Notification Time: 10:29 [ET]
Event Date: 02/17/2018
Event Time: 02:00 [CST]
Last Update Date: 02/17/2018
Notification Time: 10:29 [ET]
Event Date: 02/17/2018
Event Time: 02:00 [CST]
Last Update Date: 02/17/2018
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):
AARON McCRAW (R3DO)
AARON McCRAW (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 94 | Power Operation | 94 | Power Operation |
DAMAGED BUS BAR IDENTIFIED POTENTIALLY AFFECTING HIGH PRESSURE CORE SPRAY
"This report is being made in accordance with 10 CFR 50.72(b)(3)(v)(D) for an event or condition that could have prevented fulfillment of a safety function needed to mitigate the consequences of an accident. While troubleshooting an issue with the Unit 1B Diesel Generator Oil Circulating pump, damage of a bus bar was identified at the breaker that supplies the Unit 1B Diesel Generator Auxiliaries. One of the loads fed from this breaker is the Division 3 DC Battery Charger. It has been determined that the degradation of the bus bar may have prevented the Division 3 DC Battery Charger from performing its function which could have prevented the High Pressure Core Spray System (HPCS) from performing its design safety function. Since HPCS is a single train safety system, it has been determined that this failure could potentially affect the safety function of this system, and is reportable as an 8 hour notification."
The NRC Resident Inspector has been notified.
"This report is being made in accordance with 10 CFR 50.72(b)(3)(v)(D) for an event or condition that could have prevented fulfillment of a safety function needed to mitigate the consequences of an accident. While troubleshooting an issue with the Unit 1B Diesel Generator Oil Circulating pump, damage of a bus bar was identified at the breaker that supplies the Unit 1B Diesel Generator Auxiliaries. One of the loads fed from this breaker is the Division 3 DC Battery Charger. It has been determined that the degradation of the bus bar may have prevented the Division 3 DC Battery Charger from performing its function which could have prevented the High Pressure Core Spray System (HPCS) from performing its design safety function. Since HPCS is a single train safety system, it has been determined that this failure could potentially affect the safety function of this system, and is reportable as an 8 hour notification."
The NRC Resident Inspector has been notified.