ENS 56252
ENS Event | |
|---|---|
05:00 Oct 5, 2022 | |
| Title | Part 21 - Deviation to Qualified Design |
| Event Description | The following is a summary of information provided by Flowserve - Limitorque via email:
Entergy Waterford 3 informed Flowserve - Limitorque on 10/5/2022 that it discovered that a Peerless 125 volt, 25ft-lb, 56 frame direct current (DC) motor had two fasteners securing the brush holder ring assembly to the motor frame. However, the DC motor assembly used in the qualification test program was assembled with 4 fasteners. Therefore, the use of two fasteners is a deviation to the qualified design. Flowserve is submitting this report as an interim report and is evaluating this deviation to determine whether this condition could potentially affect the safety related function of DC powered Limitorque actuators. Flowserve is continuing to work with the motor original equipment manufacturer (OEM) to refine the scope of potentially affected motors. Limitorque actuators equipped with Peerless - Winsmith DC electric motors with start torque ratings of 40 ft-lb and larger are not affected by this issue. Limitorque actuators equipped with alternating current (AC) powered electric motors are not affected by this issue. The evaluation is expected to be completed by 01/27/2023. If there are questions, or addition information is required, please contact Chris Shaffer, Quality Assurance Manager, Flowserve Corporation, Ph: (434) 522-4136. Known affected plant: Waterford 3 Nuclear Generating Station
Flowserve provided an update to notify that the final evaluation of the safety consequence and reportability, primarily involving seismic qualification, will be delayed until 02/24/2023. Notified R4DO (Agrawal) via phone and the Part 21 group via email.
Flowserve has completed the evaluation of the deviation described in the initial notification. Flowserve has concluded that the deviation has no substantial impact to the safety function of the component and/or the associated actuator. Notified R4DO (Vossmar) via phone and the Part 21 group via email. |
| Where | |
|---|---|
| Flowserve Lynchburg, Virginia (NRC Region 2) | |
| Organization: | Flowserve |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
| Time - Person (Reporting Time:+1376.75 h57.365 days <br />8.195 weeks <br />1.886 months <br />) | |
| Opened: | Chris Shaffer 14:45 Dec 1, 2022 |
| NRC Officer: | Ernest West |
| Last Updated: | Mar 6, 2023 |
| 56252 - NRC Website | |
Flowserve with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
WEEKMONTHYEARENS 567642023-09-29T04:00:00029 September 2023 04:00:00
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