ENS Event | |
|---|---|
13:18 May 21, 2025 | |
| Title | Part 21 REPORT- Circuit Breaker Defect |
| Event Description | The following information is a summary provided by the licensee via phone and email:
Twenty-one (21) breakers were installed at Arkansas Nuclear One (ANO) by Framatome Inc during a recent refurbishment. During the refurbishment, shorter bell cranks were installed to mitigate an identified interference. These shorter bell cranks result in a higher force being needed to close the breaker which could result in failure of the pushrods. In the event of a pushrod failure, the breaker may not trip when required, resulting in a substantial safety hazard. Framatome has provided written correspondence to ANO to advise on this issue. Model: 5-3AF-GEU-350-1200 Breaker Affected plants: Arkansas Nuclear One Gayle Elliott Director, Licensing Regulatory Affairs Framatome Inc. gayle.elliott@framatome.com |
| Where | |
|---|---|
| Framatome Lynchburg, Virginia (NRC Region 1) | |
| Organization: | Framatome Anp |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+19.95 h0.831 days <br />0.119 weeks <br />0.0273 months <br />) | |
| Opened: | Gayle Elliott 09:15 May 22, 2025 |
| NRC Officer: | Jordan Wingate |
| Last Updated: | May 22, 2025 |
| 57729 - NRC Website
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Framatome with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 577292025-05-21T13:18:00021 May 2025 13:18:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 REPORT- Circuit Breaker Defect ENS 552822021-05-28T04:00:00028 May 2021 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Vacuum Breakers Failure to Close ENS 537802018-10-09T05:00:0009 October 2018 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part-21 - Rhr Shaft Seal O-Ring Sheared Due to Manufacturer Defect ENS 534422018-05-31T04:00:00031 May 2018 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Failure of Relays to Change State 2025-05-21T13:18:00 | |