ENS 56821: Difference between revisions
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| NRC officer = Lawrence Criscione | | NRC officer = Lawrence Criscione | ||
| event date = 08/30/2023 00:00 PDT | | event date = 08/30/2023 00:00 PDT | ||
| last update date = | | last update date = 12/07/2023 | ||
| title = Part 21 - Inconsistent Potentiometer Resistance Values | | title = Part 21 - Inconsistent Potentiometer Resistance Values | ||
| event text = The following is a synopsis of information that was provided by Curtiss-Wright via fax: | | event text = The following is a synopsis of information that was provided by Curtiss-Wright via fax: | ||
On August 30, 2023, Enertech (a division of Curtiss-Wright) determined a potential defect for | On August 30, 2023, Enertech (a division of Curtiss-Wright) determined a potential defect for potentiometer part number D2060S based on the inspection of a returned items from Korea Hydro and Electro Power in Korea. A number of returned potentiometers exhibited inconsistent resistance values at certain stroke positions. The potentiometers are used in modulating actuators. | ||
A shorter wiper was used in the manufacture of the potentiometers that introduced the possibility of intermittent separation between the wiper (sliding contact) and the coil at certain stroke positions, resulting in momentary signal interruptions. | A shorter wiper was used in the manufacture of the potentiometers that introduced the possibility of intermittent separation between the wiper (sliding contact) and the coil at certain stroke positions, resulting in momentary signal interruptions. | ||
The evaluation at Enertech is also ongoing regarding the potential effects of wiper separation on the functionality of the modulating actuator and will not be completed within 60 days. The expected date of completion is December 20, 2023. | The evaluation at Enertech is also ongoing regarding the potential effects of wiper separation on the functionality of the modulating actuator and will not be completed within 60 days. The expected date of completion is December 20, 2023. | ||
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Questions should be directed to Loretta Anaya, Quality Assurance Manager, Enertech, at 714-982-1856. | Questions should be directed to Loretta Anaya, Quality Assurance Manager, Enertech, at 714-982-1856. | ||
Known potentially affected plant(s): South Texas Project | Known potentially affected plant(s): South Texas Project | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2023/ | * * * UPDATE ON 12/7 AT 1807 EST FROM SANDRA VALDIVIA TO ERNEST WEST * * * | ||
Enertech has completed their evaluation of the deviation described in their interim report submitted on 27 October, 2023, and concluded that the deviation does not potentially create a substantial safety hazard. | |||
Notified R4DO (Dixon) and Part 21 Group (Email) | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2023/20231208en.html#en56821 | |||
}} | }} | ||
{{ENS-Nav}} | {{ENS-Nav}} | ||
Latest revision as of 08:30, 8 December 2023
| Where | |
|---|---|
| Curtiss Wright Flow Control Co. Brea, California (NRC Region 4) | |
| Organization: | Curtiss Wright Flow Control Co. |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
| Time - Person (Reporting Time:+1405.95 h58.581 days <br />8.369 weeks <br />1.926 months <br />) | |
| Opened: | Loretta Anaya 20:57 Oct 27, 2023 |
| NRC Officer: | Lawrence Criscione |
| Last Updated: | Dec 7, 2023 |
| 56821 - NRC Website | |