ENS 55027
ENS Event | |
|---|---|
05:00 Oct 20, 2020 | |
| Title | Part 21 Report - Camshaft Key with Incorrect Stamping |
| Event Description | The following is a summary of the report provided by the supplier:
ESI supplied stepped camshaft keys with an incorrect stamping. The keys are stamped "AFT" on one end to identify orientation during installation. Keys supplied by ESI have AFT" stamped on the opposite end of where they should be stamped. If installed incorrectly and the condition goes undetected during post-maintenance inspection activities, engine performance could suffer resulting in inability of the emergency diesel generator set to perform its safety-related function. This issue is therefore considered to be a reportable defect as defined by 10CFR-part 21. The key is used in early Cooper-Bessemer model KSV diesel engines to locate the fuel pump cam on the engine's camshaft. This design has a stepped arrangement to provide 4-1/2 degree timing retard. The key is stamped "AFT" to designate the end facing the generator end of the engine. An additional "CAM" tamping designates the cam (up) surface. In the event the key is stamped incorrectly, it is feasible the key could be installed backward which would advance the timing by 9 degree from the desired position. Date which the information of the defect or failure was obtained is October 20, 2020. The extent of condition is limited to the part number supplied on the following two orders: Part Number (KSV-16-6E#1) Customer (Nebraska Public Power District (NPPD) - Cooper Nuclear Station) Purchase Orders: 1. NPPD Purchase Order Number (4500106009), ESI Sales Order Number (3006001), Quantity - 5 2. NPPD Purchase Order Number (4500106222), ESI Sales Order Number (3006017), Quantity - 5 Corrective Actions For affected users: Camshaft keys installed on engines: No action is required provided post-maintenance injection timing was verified and subsequent engine performance was successful. An incorrectly installed key would be evident by a shift in fuel injection timing. If injection timing and/or engine performance has not been verified, then additional inspections should be performed to verify installed keys from the above referenced orders are oriented properly. Camshaft keys in inventory (not-installed) on engines: Cooper Nuclear may elect to correct the mislabeled condition or return to ESI for rework. To correct the condition, surface grind to remove the existing "AFT" stamping. Stamp opposite end with "AFT" designation. For affected ESI: The dedication report will be revised to add clarification of the correct end for the "AFT" stamping. This will be completed by December 18, 2020. Points of Contact: John Kriesel, Engineering Manager and Dan Roberts, Quality Manager at Engine Systems Inc. 175 Freight Rd. Rocky Mount, NC 27804. Office number: 252-977-2720 |
| 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:+1233.7 h51.404 days <br />7.343 weeks <br />1.69 months <br />) | |
| Opened: | Dan Roberts 15:42 Dec 10, 2020 |
| NRC Officer: | Kerby Scales |
| Last Updated: | Dec 10, 2020 |
| 55027 - NRC Website | |
Engine Systems Inc. with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 550272020-10-20T05:00:00020 October 2020 05:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Camshaft Key with Incorrect Stamping 2020-10-20T05:00:00 | |