Event Notification Report for June 23, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/22/2025 - 06/23/2025
EVENT NUMBERS
57785
57785
Power Reactor
Event Number: 57785
Facility: Columbia Generating Station
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: Valerie Lagen
HQ OPS Officer: Ian Howard
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: Valerie Lagen
HQ OPS Officer: Ian Howard
Notification Date: 06/26/2025
Notification Time: 14:31 [ET]
Event Date: 06/23/2025
Event Time: 08:27 [PDT]
Last Update Date: 06/26/2025
Notification Time: 14:31 [ET]
Event Date: 06/23/2025
Event Time: 08:27 [PDT]
Last Update Date: 06/26/2025
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
Bywater, Russell (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
Bywater, Russell (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 18 | Power Operation | 0 | Cold Shutdown |
PART 21 REPORT - SOLENOID VALVE DEFECT
The following information was provided by the licensee via phone and email:
"Valcor supplied replacement V70900-45 solenoid valves with substitute EM163-80 EPDM O-ring material (due to the obsolescence of the original E0515-80 material) and certified to the original qualification test report based on Delta Qualification report QRSKC26022-1. These replacement solenoid valves were installed at Columbia Generating Station (CGS) in July 2024 as control rod drive scram discharge volume solenoid drain valves. On September 26, 2024, CGS identified this change in material and the issue was entered into the corrective action program. Columbia's review of the Delta Qualification report identified the justification of the thermal life of the new O-ring compound when used in normally energized valves such as those supplied to CGS was not adequate. This issue was communicated to the NRC with an interim Part 21 notification on November 21, 2024 (ML24326A362).
"Valcor's report of additional testing to attempt to justify the new O-ring material as equal to or better than the original material was submitted to CGS on February 24, 2025. Columbia concluded the justification was inadequate and submitted to a third party for evaluation."
The Senior Resident Inspector has been notified.
The following information was provided by the licensee via phone and email:
"Valcor supplied replacement V70900-45 solenoid valves with substitute EM163-80 EPDM O-ring material (due to the obsolescence of the original E0515-80 material) and certified to the original qualification test report based on Delta Qualification report QRSKC26022-1. These replacement solenoid valves were installed at Columbia Generating Station (CGS) in July 2024 as control rod drive scram discharge volume solenoid drain valves. On September 26, 2024, CGS identified this change in material and the issue was entered into the corrective action program. Columbia's review of the Delta Qualification report identified the justification of the thermal life of the new O-ring compound when used in normally energized valves such as those supplied to CGS was not adequate. This issue was communicated to the NRC with an interim Part 21 notification on November 21, 2024 (ML24326A362).
"Valcor's report of additional testing to attempt to justify the new O-ring material as equal to or better than the original material was submitted to CGS on February 24, 2025. Columbia concluded the justification was inadequate and submitted to a third party for evaluation."
The Senior Resident Inspector has been notified.