ENS 56913
ENS Event | |
|---|---|
05:00 Nov 27, 2023 | |
| Title | |
| Event Description | The following is a summary of the information provided by Engine Systems, Inc. (ESI) via fax:
An edge or lip in the bore of an EMD (Brand name: Electro-Motive Diesel) cylinder liner prevented successful installation of the corresponding power assembly on an emergency diesel generator set. The lip is located axially at the bottom of the inlet ports and is present around the circumference of the bore. The EMD model 645E4 is a 2-stroke engine with air inlet ports in the wall of the cylinder liner. As the piston travels below the inlet ports, air box pressure scavenges and replenishes air to the power assembly. Installation of the power assembly requires lowering the piston through the liner in order to secure the connecting rod to the crankshaft. During this process the piston could not be lowered below the inlet ports due to the piston rings catching on the lip. The power assembly was not installed and therefore there was no safety hazard; however, if the defect had gone undetected there was the potential to damage engine components and possibly reduce load carrying capacity of the engine. The extent of the condition is this single cylinder liner, P/N 9318833, S/N 20M0938 used in the power assembly at Tennessee Valley Authority (TVA) - Sequoyah Nuclear Plant, Serial Number: 23H1306. Corrective Actions: For TVA-Sequoyah: No action required; the power assembly has been returned to ESI. For ESI: To prevent reoccurrence, ESI has revised the dedication package to include verification that bore machining is continuous along the entire length and no edges or lips are present. The revision was implemented on December 6, 2023.
Engine Systems, Inc. sent a revision to change the date of defect identification to November 27, 2023. Notified R2DO (Miller), Part 21 Group (email) |
| Where | |
|---|---|
| Engine Systems, Inc. Rocky Mountain, 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:+923 h38.458 days <br />5.494 weeks <br />1.264 months <br />) | |
| Opened: | Dan Roberts 16:00 Jan 4, 2024 |
| NRC Officer: | Ossy Font |
| Last Updated: | Jan 17, 2024 |
| 56913 - NRC Website | |
Engine Systems, Inc. with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 569132023-11-27T05:00:00027 November 2023 05:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - EMD Cylinder Liner with Bore Deficiency ENS 566032023-05-17T04:00:00017 May 2023 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Emergency Diesel Generator - Incorrect Bus BAR Installation ENS 558072022-01-27T04:00:00027 January 2022 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - ELECTRO-MOTIVE Diesel (EMD) Cylinder Head with Fireface Thickness Below Specification ENS 545882020-03-19T04:00:00019 March 2020 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Test Stand Deficiency ENS 530842017-11-20T05:00:00020 November 2017 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part-21 - Auxiliary Feedwater Pump Power Supply Failure ENS 530372017-10-25T04:00:00025 October 2017 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Speed Switch Issue Results in Emergency Diesel Generator Failure to Start ENS 526422017-03-27T04:00:00027 March 2017 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Identification of Failed Diode Surge Suppressor with Internal Manufacturing Defect ENS 514952015-08-26T04:00:00026 August 2015 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Speed Switch Capacitor Failure ENS 498302014-02-10T05:00:00010 February 2014 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Failed Pressure Regulator During Post-Installation Edg Pressure Testing ENS 495342013-10-25T05:00:00025 October 2013 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part21 - Diode Cr7 Wiring Reversed on Automatic Voltage Regulator Panels 2023-05-17T04:00:00 | |