ENS 56958
ENS Event | |
|---|---|
00:00 Dec 13, 2023 | |
| Title | Part 21 - Interim Report for Oil Filled Capacitors |
| Event Description | The following is a synopsis of information that was provided by AMETEK Solidstate Controls Inc. via email:
This component (07-020139-10) is a 13 micro-Farad AC oil filled capacitor. During operation in an inverter, oil may be visible on, around, or dripping from the capacitor or its mounting bracket or tray. If allowed sufficient time, enough oil will leak from the capacitor that it will short internally and fail. Time required for the failure could be greater than the recommended 10-year preventative maintenance cycle for this part. AMETEK Solidstate Controls has not been able to determine a definitive cause of the failure, but is working to do so. These capacitors are generally part of a larger capacitor bank. The failure would result in a reduction of output voltage that is directly proportional to the number of capacitors in the bank that fail. Any single capacitor failure would be less than a 3 volt decrease in output voltage. Users of these capacitors should visually inspect any equipment containing the capacitor part number stated above for evidence of an oil leak. A review of the output voltage for the parent equipment for any consistent decrease in voltage of 0-3V may serve as an indication of capacitor failure. The user should notify AMETEK Solidstate Controls if any oil is observed during inspection. Corrective actions should be established by May 2024. Affected plants are not listed.
FINAL REPORT FOR OIL FILLED CAPACITORS AMETEK Solidstate Controls Inc, (SCI) has completed their evaluation of the deviation described in their interim report submitted on February 9, 2024, and concluded that there was no way of recreating the potential defect and no evidence of a broad defect with the general design, manufacture, or use of the capacitor. However, they identified hypothesized causes of the failure and corrective actions to mitigate failure risks. AMETEK SCI also identified the end users that may be potentially affected. The affected plants are Duke Energy; Oconee and Catawba, TVA; Browns Ferry and Watts Bar; Georgia Power, Vogtle 1 and 2; Dominion; Surry; and South Texas Nuclear Operating Company. Notified R2DO(Miller), R4DO(Josey) and Part 21/50.55 Reactors (email) |
| Where | |
|---|---|
| Ametek Solidstate Controls (NRC Region 0) | |
| Organization: | Ametek Solidstate Controls |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+1408.22 h58.676 days <br />8.382 weeks <br />1.929 months <br />) | |
| Opened: | Zach Rumora 16:13 Feb 9, 2024 |
| NRC Officer: | Thomas Herrity |
| Last Updated: | May 17, 2024 |
| 56958 - NRC Website | |
Ametek Solidstate Controls with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component, 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 569582023-12-13T00:00:00013 December 2023 00:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect, 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 - Interim Report for Oil Filled Capacitors ENS 554532021-09-09T04:00:0009 September 2021 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Nonconforming Relay Led to Failures of Battery Chargers ENS 551672021-04-01T04:00:0001 April 2021 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect, 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 Interim Report - Failure of Ametek 300V, 250A Clamp Diodes ENS 545202020-02-11T05:00:00011 February 2020 05:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 Report - Ametek 85-Rp2675-01 Power Supply Mounting Hardware ENS 538162019-01-07T05:00:0007 January 2019 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect En Revision Imported Date 2/1/2019 ENS 535292018-05-01T04:00:0001 May 2018 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Potential Defect in Ac Voltage Sense Board ENS 505452014-10-16T04:00:00016 October 2014 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Insufficient Spot Weld on Wire Wound Resistor 2023-12-13T00:00:00 | |