ENS 57785
ENS Event | |
|---|---|
15:27 Jun 23, 2025 | |
| Title | Part 21 Report - Solenoid Valve Defect |
| Event Description | 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. |
| Where | |
|---|---|
| Columbia Washington (NRC Region 4) | |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+71.07 h2.961 days <br />0.423 weeks <br />0.0974 months <br />) | |
| Opened: | Valerie Lagen 14:31 Jun 26, 2025 |
| NRC Officer: | Ian Howard |
| Last Updated: | Jun 26, 2025 |
| 57785 - NRC Website
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WEEKMONTHYEARENS 577852025-06-23T15:27:00023 June 2025 15:27:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Solenoid Valve Defect ENS 529132017-08-12T07:00:00012 August 2017 07:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Relay Mounting Plate Mounted Upside Down ENS 526152017-03-14T23:00:00014 March 2017 23:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Evaluation of a Deviation - Starter Contactor Failure 2025-06-23T15:27:00 | |