ENS 57988
From kanterella
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
ENS Event | |
|---|---|
04:00 Aug 27, 2025 | |
| Title | Part 21 - Power Driven Potentiometer with Loose Relay Sockets |
| Event Description | The following is a summary of information provided by Engine Systems Inc. (ESI) via email:
Relay sockets used to retain relays 'K1' and 'K2' on a power driven potentiometer (PDP), part number: ESI 50258, were found to have low retention force. Without both relays installed, the raise and lower function of the PDP is inoperable, thus preventing adjustment of the generator output voltage. There is a scenario where if the PDP is adjusted to a value other than the normal voltage setpoint and if the K1 or K2 relays were to dislodge during a subsequent emergency event, the PDP would not return to its preposition setpoint and therefore the generator terminal voltage would not return to its desired voltage setpoint, in which case the ability of the emergency diesel generator to carry its safety-related loads could be impacted Affected Plants Region 3: Prairie Island ESI contact information: Dan Roberts Quality Manager Engine Systems Inc 175 Freight Rd 175 Rocky Mount, NC 27804 |
| Where | |
|---|---|
| Engine Systems, Inc Rocky Mount, North Carolina (NRC Region 1) | |
| Organization: | Engine Systems, Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+1182.1 h49.254 days <br />7.036 weeks <br />1.619 months <br />) | |
| Opened: | Dan Roberts 10:06 Oct 15, 2025 |
| NRC Officer: | Ernest West |
| Last Updated: | Oct 15, 2025 |
| 57988 - NRC Website | |
Engine Systems, Inc with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 579882025-08-27T04:00:00027 August 2025 04:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Power Driven Potentiometer with Loose Relay Sockets ENS 565382023-03-28T04:00:00028 March 2023 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Defect Identified in Emergency Diesel Generator Governor ENS 556052021-11-09T17:00:0009 November 2021 17:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Hinge Pin Retainer Plug Defective on Diesel Check Valve ENS 555312021-08-20T16:00:00020 August 2021 16:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Pressure Regulator Valve Failure ENS 553472021-05-11T16:00:00011 May 2021 16:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Initial Report - Deviation Identified Loose Zinc Anodes Installed in Heat Exchangers for Diesel Generators ENS 544672020-01-08T05:00:0008 January 2020 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Inadequate Selenium Surge Suppressor Thread Modification ENS 543502019-09-06T04:00:0006 September 2019 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Emd Fuel Injectors Seized Plunger and Bushing ENS 542362019-08-22T04:00:00022 August 2019 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Cracked Spray Tip on Emd Fuel Injector ENS 537632018-11-30T05:00:00030 November 2018 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect En Revision Imported Date 12/24/2018 ENS 536002018-07-19T04:00:00019 July 2018 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Motor Operated Potentiometer Defect ENS 533022018-02-01T04:00:0001 February 2018 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Refurbished Pressure Regulator May Result in Emergency Diesel Generator Failure to Start ENS 527982017-06-08T04:00:0008 June 2017 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Defective Motor Operated Potentiometer ENS 524662016-12-21T05:00:00021 December 2016 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Issues Identified with the Enterprise Diesel Engine Subcover ENS 524772016-11-12T05:00:00012 November 2016 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Seizure of Fuel Injector on Emergency Diesel Generator ENS 511292015-06-05T22:12:0005 June 2015 22:12:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Incorrect Part Number Relay Shipped to Brunswick Nuclear Plant ENS 489602013-04-19T04:00:00019 April 2013 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Esi Refurbished Emergency Diesel Generator Cylinder Heads May Have Valve Keeper Seals Missing ENS 485642012-12-06T05:00:0006 December 2012 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Esi Refurbished Emergency Diesel Generator Cylinder Head with Foreign Material in Intake Port 2025-08-27T04:00:00 | |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_57988&oldid=5535096"