ENS 56387
ENS Event | |
|---|---|
06:00 Jan 29, 2023 | |
| Title | Part 21 - Defect Identified in Automatic Transfer Switch |
| Event Description | The following information was provided by Paragon Energy Solutions, LLC via email:
Pursuant to 10 CFR 21.21(d)(3)(i), Paragon Energy Solutions, LLC is providing initial notification of the identification of a defect potentially associated with a substantial safety hazard. The subject Automatic Transfer Switches contain Mar-Bal bus insulators. Based on Paragon testing performed, the insulators may have developed stress cracking due to over tightening of required mounting hardware during the assembly process which was not detected by inspection at Paragon. Stress cracks in the insulators could degrade the structural integrity of the automatic transfer switch to withstand seismic conditions which could potentially cause a substantial safety hazard. Only one customer, Talen Energy-Susquehanna, is affected by this issue. Serial numbers of the potentially effected units (QTY 4): 351029663-1 through 351029663-4. It is recommended the licensee inspect the insulators for the supplied automatic transfer switches for stress cracking and contact Paragon for any needed assistance to resolve any deficiencies identified. The date of discovery was 1/29/2023, and the date of the Part 21 Reportability determination was 3/2/2023. Formal notification will be submitted on or before 3/31/2023. Point of Contact: Richard Knott Vice President Quality Assurance Paragon Energy Solutions 817-284-0077 rknott@paragones.com
Paragon Energy Solutions submitted their final report in accordance with 10CFR 21.21(d)(4). Paragon recommends inspection of the 4 automatic transfer switches supplied to Talen Susquehanna for insulator cracking at the next regularly scheduled maintenance period and replacement of any insulators found to exhibit stress cracking. Notified R1DO (Schroeder) and Part 21/50.55 Group via email. |
| Where | |
|---|---|
| Paragon Energy Solutions Forth Worth, Texas (NRC Region 4) | |
| Organization: | Paragon Energy Solutions |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+798.85 h33.285 days <br />4.755 weeks <br />1.094 months <br />) | |
| Opened: | Richard Knott 12:51 Mar 3, 2023 |
| NRC Officer: | Karen Cotton-Gross |
| Last Updated: | Mar 31, 2023 |
| 56387 - NRC Website | |
Paragon Energy Solutions with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 571432024-05-09T04:00:0009 May 2024 04:00:00
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