ENS 48960
ENS Event | |
|---|---|
04:00 Apr 19, 2013 | |
| Title | Part 21 Report - Esi Refurbished Emergency Diesel Generator Cylinder Heads May Have Valve Keeper Seals Missing |
| Event Description | The following information is a summary of a report faxed to the Operations Center from Engine Systems, Inc. (ESI) concerning a condition reportable under 10 CFR 21:
Engine Systems Inc. (ESI) began a 10 CFR 21 evaluation on 02/19/13 following the failure analysis of a cylinder head returned by South Texas Project (STP). The cylinder head had been installed on an emergency diesel generator set at STP and, during routine prestart checks, oil was found leaking from the Kiene valve while barring over the engine. This cylinder head had been previously refurbished in 2004 under ESI's 10 CFR 50 Appendix B program. ESI's investigation revealed that the refurbished cylinder head was returned to the customer without keeper seals installed. The evaluation was concluded on 04/19/13 and it was determined that this issue is a reportable defect as defined by 10 CFR 21. Omission of the keeper seals from the cylinder head of the KSV emergency diesel generator set could allow engine lubricating oil to migrate through the cylinder head and into the combustion chamber during engine standby conditions. Presence of this oil could damage the engine to the point that it is unable to perform its safety related function. ESI began dedicating refurbished cylinder heads in 2001 but the refurbishment scope did not include valve train components. Refurbishments that included valve train components were first shipped in 2003. Procedure steps were included in 2007 to verify valve keepers were installed. Therefore, only cylinder heads refurbished between 2003 and 2007 are affected. A review of purchase orders have determined that the following plants received a total of 26 cylinder heads that may not have valve keeper seals installed: Byron Station - 3 heads South Texas Project - 21 heads Cooper Nuclear Plant - 2 heads Affected cylinder head part numbers are 10-KSV-11-3-RR, 12-KSV-11-3-RR AND 13-KSVR-11-6-RR. ESI will be notifying affected customers. |
| 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:+108.53 h4.522 days <br />0.646 weeks <br />0.149 months <br />) | |
| Opened: | Tom Horner 16:32 Apr 23, 2013 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Apr 23, 2013 |
| 48960 - NRC Website | |
Engine Systems, Inc with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 565382023-03-28T04:00:00028 March 2023 04:00:00
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