ENS 55497
ENS Event | |
|---|---|
05:00 Sep 3, 2021 | |
| Title | Part 21 Report - Deviation in DC-DC Converter Rectifiers in Inverter Assemblies |
| Event Description | The following is a synopsis of information received from Paragon Energy Solutions via email:
On 9/3/2021, Paragon Energy Solutions determined that they did not have sufficient information to determine if the inverter assemblies would, or has, created a substantial safety hazard or would have created a technical specification safety limit violation as it relates to plant applications. Exelon (Limerick and Peach Bottom) were notified on 9/3/2021. Duke (Brunswick) was notified on 9/7/2021. On 9/28/2021, Exelon Peach Bottom provided information indicating the failure of the unit in service could cause a substantial safety hazard in their application. Quantity of Inverters: Brunswick (7), Limerick (6), Peach Bottom (4). Component Description: Inverter Assembly 1000VA (Model CSI-K-B-Q9573-1), Nuclear Logistics part number: NLI-072034-CSI-K-5-A. The failed component is the DC-DC converter output rectifiers. Nature of Defect: The deviation relates to failure of the installed Absopulse 1000VA inverter (Model CSI-K-B-Q9573-1). The extent of condition is currently limited to Absopulse inverters manufactured or repaired in 2015 and later. The root cause of the failure is currently under investigation. The failed component is the DC-DC converter output rectifiers. Advice Related to Defect: Paragon recommends the identified plants evaluate their specific application and determine whether the condition described in this notice affects their design basis. If the licensee determines that it does, please contact Paragon to determine appropriate corrective action. Tracy Bolt Chief Nuclear Officer, CNO 817-284-0077 Paragon Energy Solutions, LLC 7410 Pebble Drive Ft. Worth, TX 76118 |
| Where | |
|---|---|
| Paragon Energy Solutions Fort 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:+613 h25.542 days <br />3.649 weeks <br />0.84 months <br />) | |
| Opened: | Tracy Bolt 18:00 Sep 28, 2021 |
| NRC Officer: | Kerby Scales |
| Last Updated: | Sep 28, 2021 |
| 55497 - NRC Website | |
Paragon Energy Solutions with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 568992023-12-18T06:00:00018 December 2023 06:00:00
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