ENS 57437

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v t e ENS Event
22:01 Sep 26, 2024
Title	Part 21 - Defective Thermal Overload Relay Discovered During Testing
Event Description	The following information was provided by the licensee via phone and email: This notification is a 10 CFR 21.21(a)(2) interim report for General Electric thermal overload relay, model CF124G011, part number DD317A7861P003. A sample of overload relays were sent to PowerLabs for parts quality initiative testing. The results were reviewed by James A. FitzPatrick Nuclear Power Plant (JAF) and a deviation in one relay component was discovered. Testing identified a failure to latch on trip, which is a deviation from the performance characteristics of the relay. Under normal operation, the relay would latch in the tripped state requiring a manual reset of the relay. If the relay with the deviation were installed, the relay would trip when required; however, it would automatically reset. The unexpected reset could result in unintended cycling of associated equipment including repeated exposure to inrush current and potential damage. Bench testing would be expected to identify this condition prior to installation. Based on a review, this potential condition does not affect installed equipment. The affected relay was stored at JAF since July 1998. The cause of the deviation cannot be investigated because the part is not available; however, the evaluation of the potential effect of the condition on equipment where the relay could have been used at JAF is ongoing, and it is expected to be completed by February 28, 2025. This notification is being submitted as an interim report per 10CFR21.21(a)(2). The NRC resident inspector has been notified.

ENS 57437 +/-
Where
FitzPatrick New York (NRC Region 1)
Reporting

10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
Time - Person (Reporting Time:+1357.82 h56.576 days <br />8.082 weeks <br />1.86 months <br />)
Opened:	Ryan Perry 12:50 Nov 22, 2024
NRC Officer:	Robert A. Thompson
Last Updated:	Nov 25, 2024
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v • d • e

v t e Emergency Notification System
FitzPatrick with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
WEEKMONTHYEAR2024-09-26T22:01:00 [Table view]
[ENS list for FitzPatrick]

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