ML26048A151
| ML26048A151 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 01/10/2024 |
| From: | Bouknight J South Carolina Electric & Gas Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| EN 56920 | |
| Download: ML26048A151 (0) | |
Text
02-12-2026 07:03:41 U.S. Nuclear Regulatory Commission Operations Center Report 7
02-12-2026 07:03:41 U.S. Nuclear Regulatory Commission Operations Center Report Event #:
56920 Event Type:
Part 21 Reporting Org:
V. C. Summer Notify Date/Time:
2024-01-10 08:18 (EST)
Licensee:
V. C. Summer Event Date/Time:
2021-05-05 00:00 (EST)
Modify Date/Time:
2024-01-17 20:27 Region:
2 City:
Jenkinsville Agreement State:
Yes County:
Fairfield License #:
State:
SC Notified by:
Justin Bouknight Notifications:
Miller, Mark R2DO HOO:
Thomas Herrity Part 21/50.55 Reactors, - EMAIL Emergency Class:
Non Emergency 10 CFR Sections:
21.21(d)(3)(i)
Defects And Noncompliance PART 21 - GOULD FIELD FLASH RELAY ON EMERGENCY DIESEL FAILED The following information was provided by the licensee via email and phone call:
"On January 9, 2024, VC Summer Nuclear Station (VCSNS) determined a manufacturing defect affecting a field flash contactor (K2) relay on its 'B' emergency diesel generator (EDG) was reportable under Part 21.
"During testing on May 5, 2021, the 'B' EDG was rendered inoperable when its K2 relay coil switch exhibited intermittent binding due to insufficient clearances of the switch actuator from the protective case and plastic switch molding. The inadequate clearances resulted in accelerated loss of graphite lubrication at these locations, which led to mechanical binding. VCSNS replaced the affected relay and restored operability of its 'B' EDG.
"Manufacturer/Model: Gould F10NOCLD1 DC coil switch "A written notification in accordance with 10 CFR 21.21(d)(3)(ii) will be provided within 30 days. The NRC Senior Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The licensee did not notify the intellectual property owner because the manufacturer is no longer operating or in business. They are not aware of other plants that utilize this coil switch.
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