ENS Event | |
|---|---|
04:00 May 31, 2018 | |
| Title | Part 21 Notification - Failure of Relays to Change State |
| Event Description | The following report was received via a fax:
Identification of Basic Activity: Eaton NBF66F Relay Basic Activity Supplied By: Framatome Inc. Nature of Defect: While performing analysis on AC Eaton NBF relays, Framatome discovered that, unless a specific application technique is utilized while applying epoxy to the pin within the crossbar, the potential for the epoxy to become foreign material is introduced. This foreign material could migrate to the area between the moving and stationary magnets, preventing the relay from completing its change of state when called upon. This condition does not occur in the de-energized direction. Framatome has not been notified of any occurrence of this condition. A different epoxy application technique was utilized between 2008 and May of 2013 on relays provided to HB Robinson (the only customer requiring the epoxy application by Framatome). Thus, a potential for this defect is limited to those relays provided during that time period. Defect Determination Date: This issue was determined to be a 10 CFR 21 defect on May 31, 2018. Number and Location of Basic Components: 307 potentially affected safety related relays with epoxy applied to their relay pins were supplied to the H.B. Robinson nuclear plant. Corrective Actions to Date: The application process was reevaluated and revised in 2013. Advice related to the Defect: Framatome is working to provide advice to the customer on the path forward related to this defect. |
| Where | |
|---|---|
| Framatome Lynchburg, Virginia (NRC Region 1) | |
| Organization: | Framatome Inc. |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+58.53 h2.439 days <br />0.348 weeks <br />0.0802 months <br />) | |
| Opened: | Gayle Elliott 14:32 Jun 2, 2018 |
| NRC Officer: | Dong Park |
| Last Updated: | Jun 2, 2018 |
| 53442 - 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
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