Event Notification Report for March 13, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/12/2024 - 03/13/2024
EVENT NUMBERS
57041
57041
Power Reactor
Event Number: 57041
Facility: Cooper
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: Brian Stander
HQ OPS Officer: Ian Howard
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: Brian Stander
HQ OPS Officer: Ian Howard
Notification Date: 03/21/2024
Notification Time: 16:54 [ET]
Event Date: 03/13/2024
Event Time: 05:48 [CDT]
Last Update Date: 03/21/2024
Notification Time: 16:54 [ET]
Event Date: 03/13/2024
Event Time: 05:48 [CDT]
Last Update Date: 03/21/2024
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):
Gepford, Heather (R4DO)
Gepford, Heather (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
HIGH PRESSURE COOLANT INJECTION (HPCI) INOPERABLE
The following information was provided by the licensee via email and phone:
"At 0548 CDT on March 13, 2024, during a planned [high pressure coolant injection] HPCI maintenance window, a condition was identified not associated with the planned maintenance which caused HPCI to be inoperable. Specifically, the HPCI auxiliary oil pump start stop pressure switch could not be adjusted into calibration. Further investigation found that the pressure switch was not mounted as designed.
"Since HPCI is a single train system, this is a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). The condition was corrected prior to HPCI being declared operable on March 15, 2024.
"The reason for the delay in the event notification beyond 8 hours from the event time was due to not recognizing the need to report the condition while in a planned HPCI maintenance window.
"The NRC Senior Resident Inspector has been notified."
The following information was provided by the licensee via email and phone:
"At 0548 CDT on March 13, 2024, during a planned [high pressure coolant injection] HPCI maintenance window, a condition was identified not associated with the planned maintenance which caused HPCI to be inoperable. Specifically, the HPCI auxiliary oil pump start stop pressure switch could not be adjusted into calibration. Further investigation found that the pressure switch was not mounted as designed.
"Since HPCI is a single train system, this is a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). The condition was corrected prior to HPCI being declared operable on March 15, 2024.
"The reason for the delay in the event notification beyond 8 hours from the event time was due to not recognizing the need to report the condition while in a planned HPCI maintenance window.
"The NRC Senior Resident Inspector has been notified."