ML26048A138
| ML26048A138 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom, Aerotest  |
| Issue date: | 02/13/2026 |
| From: | Sowa J Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| EN 56888 | |
| Download: ML26048A138 (0) | |
Text
02-12-2026 07:03:41 U.S. Nuclear Regulatory Commission Operations Center Report 4
02-12-2026 07:03:41 U.S. Nuclear Regulatory Commission Operations Center Report Event #:
56888 Event Type:
Part 21 Reporting Org:
Sequoyah Nuclear Plant Notify Date/Time:
2023-12-13 09:45 (EST)
Licensee:
Sequoyah Nuclear Plant Event Date/Time:
2023-12-11 13:32 (EST)
Modify Date/Time:
2023-12-13 10:12 Region:
2 City:
Soddy-Daisy Agreement State:
Yes County:
Hamilton License #:
State:
TN Notified by:
Jeff Sowa Notifications:
Miller, Mark R2DO HOO:
Ernest West Part 21/50.55 Reactors, - EMAIL Emergency Class:
Non Emergency 10 CFR Sections:
21.21(d)(3)(i)
Defects And Noncompliance PART 21 - CIRCUIT BREAKER DEFECTS The following information is a synopsis of information provided by the licensee via phone and email:
On December 11, 2023, Tennessee Valley Authority Sequoyah Nuclear Plant completed an internal 10 CFR Part 21 evaluation concerning Siemens 6.9kV, 1200A vacuum circuit breakers, Model No. 7-HKR-50-1200-130. Three separate breakers were found with issues including loose wires terminated incorrectly and the mechanism-operated control switch clevis pin missing a cotter key. Additionally, the mastic insulating pads were found defective on all three lower primaries by way of separation. The affected breakers were never installed in a safety related application.
The NRC Resident Inspector will be notified.
A written notification will be provided within 30 days.
The manufacturer, Siemens, was notified of the defects.
The only plant known to be affected at the time of the report is the Sequoyah Nuclear Plant.
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