ENS 57079
ENS Event | |
|---|---|
05:00 Feb 15, 2024 | |
| Title | Initial Part 21 Report - Potential Defect with Circuit Breaker |
| Event Description | The following information was provided by the licensee via email:
Pursuant to 10CFR 21.21 (a)(2), Paragon Energy Solutions, LLC is providing this interim notification of ongoing analysis for Part 21 reportability of a potential defect with a Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000. On February 15, 2024, Paragon completed initial documentation of a potential defect with the subject circuit breaker in which Duke-Oconee had identified failure to close on demand or delayed operation to close with extended application of the remote closing signal. Since the primary safety function of the circuit breaker is to close and maintain continuity of power to downstream loads, failure to close could potentially contribute to a substantial safety hazard. This is the first reported instance of this failure mode, and Paragon suspects the issue to be related to aging of the circuit breakers lubrication. Paragon requires more time to complete testing and analysis to confirm the failure mode and determine reportability. Date when evaluation is expected to be complete: 5/03/2024. Affected licensee: Oconee. Paragon is currently evaluating the extent of condition as it pertains to other plants and equipment that may utilize the same or similar circuit breakers.
Due to inconclusive results, the completion date of the testing is revised to 05/31/2024. Notified R2DO (Miller) and Part 21/50.55 Reactors (email).
The following is a synopsis of the updated information received: The only known affected licensee is Oconee. Paragon is evaluating if the issue pertains to other equipment or plants. Paragon has conducted additional testing with the original equipment manufacturer, Schneider Electric, but will require more time to complete their evaluation. Evaluation is expected to be complete by 6/30/2024. Other circuit breaker types that may be affected are: 5GSB2-250-1200 (uses KVR type element) 5GSB2-350-1200 (uses KVR type element) 5GSB3-350-1200 (uses KVR type element) 5GSB3-350-2000 (uses KVR type element) Paragon recommends licensees with the breaker types listed above monitor for failure to close on demand or delayed. If any improper operation is found, report it to Paragon for evaluation. Contact Information: Richard Knott Vice President Quality Assurance Paragon Energy Solutions 817-284-0077 rknott@paragones.com Notified R2DO (Franke) and Part 21/50.55 Reactors (email). |
| Where | |
|---|---|
| Paragon Energy Solutions Fort Worth, Texas (NRC Region 2) | |
| Organization: | Paragon Energy Solutions |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
| Time - Person (Reporting Time:+1483.48 h61.812 days <br />8.83 weeks <br />2.032 months <br />) | |
| Opened: | Richard Knott 23:29 Apr 16, 2024 |
| NRC Officer: | Bill Gott |
| Last Updated: | May 31, 2024 |
| 57079 - NRC Website | |
Paragon Energy Solutions with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
WEEKMONTHYEARENS 570792024-02-15T05:00:00015 February 2024 05:00:00
[Table view]10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Initial Part 21 Report - Potential Defect with Circuit Breaker ENS 566532023-08-03T00:00:0003 August 2023 00:00:00 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 Initial Part 21 Report - Defect with Eaton/Cutler Hammer Size 4 and 5 Freedom Series Contactors ENS 565572023-04-05T04:00:0005 April 2023 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 - Relay Card Potential Defect ENS 551622021-03-30T21:50:00030 March 2021 21:50:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 - Failure of Size 1 and 2 Freedom Series Fvr Starters ENS 530022017-10-06T04:00:0006 October 2017 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 Interim Report - Switch with Unacceptable Chatter 2024-02-15T05:00:00 | |