ENS Event | |
|---|---|
20:30 Jan 20, 2026 | |
| Title | Part 21 - Defective Limitorque Actuator Assemblies |
| Event Description | The following information was provided by the licensee via phone and email:
On January 20, 2026, TVA Sequoyah Nuclear Plant completed a Part 21 evaluation concerning two Flowserve Limitorque actuator/motor assemblies. The assembly model numbers are 'SMB-2' and 'SB-1'. The evaluation of the 'SMB-2' assembly was for the motor pinion gear found installed backwards. The evaluation of the 'SB-1' assembly was for insufficient grease applied to the limit switch gearbox. The evaluation determined that a defect existed for these basic components. The conditions were corrected prior to installation in the containment spray system. The NRC Resident has been notified. A written notification will be provided within 30 days. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: The only plant known to be affected at the time of the report is Sequoyah Unit 1. |
| Where | |
|---|---|
Sequoyah  Soddy-Daisy, Tennessee (NRC Region 2) | |
| Organization: | Sequoyah Nuclear Plant |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+13.78 h0.574 days <br />0.082 weeks <br />0.0189 months <br />) | |
| Opened: | Jeremy Hickey 10:17 Jan 21, 2026 |
| NRC Officer: | Josue Ramirez |
| Last Updated: | Jan 21, 2026 |
| 58123 - NRC Website
Loading map... | |
WEEKMONTHYEARENS 581232026-01-20T20:30:00020 January 2026 20:30:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Defective Limitorque Actuator Assemblies ENS 568882023-12-11T18:32:00011 December 2023 18:32:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Circuit Breaker Defects ENS 563222022-05-23T05:00:00023 May 2022 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Medium Voltage Circuit Breakers 2026-01-20T20:30:00 | |