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Home NRC Library Document Collections Events, Reports Associated with Event Notification Reports 2024

Event Notification Report for April 18, 2024

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
04/17/2024 - 04/18/2024

EVENT NUMBERS
57079
Part 21
Event Number: 57079
Rep Org: Paragon Energy Solutions
Licensee:
Region: 2
City: Fort Worth   State: TX
County:
License #:
Agreement: N
Docket:
NRC Notified By: Richard Knott
HQ OPS Officer: Bill Gott
Notification Date: 04/16/2024
Notification Time: 23:29 [ET]
Event Date: 02/15/2024
Event Time: 00:00 [CDT]
Last Update Date: 04/17/2024
Emergency Class: Non Emergency
10 CFR Section:
21.21(a)(2) - Interim Eval Of Deviation
Person (Organization):
Franke, Mark (R2DO)
Part 21/50.55 Reactors (EMAIL)
Event Text
INITIAL PART 21 REPORT - POTENTIAL DEFECT WITH CIRCUIT BREAKER

The following information was provided by the licensee via email:

"Pursuant to 10CFR 21.21 (a)(2), Paragon Energy Solutions, LLC is providing this interim notification of ongoing analysis for Part 21 reportability of a potential defect with a Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000.

"On February 15, 2024, Paragon completed initial documentation of a potential defect with the subject circuit breaker in which Duke-Oconee had identified failure to close on demand or delayed operation to close with extended application of the remote closing signal. Since the primary safety function of the circuit breaker is to close and maintain continuity of power to downstream loads, failure to close could potentially contribute to a substantial safety hazard.

"This is the first reported instance of this failure mode, and Paragon suspects the issue to be related to aging of the circuit breaker's lubrication. Paragon requires more time to complete testing and analysis to confirm the failure mode and determine reportability.

"Date when evaluation is expected to be complete: 5/03/2024."

Affected licensee: Oconee. Paragon is currently evaluating the extent of condition as it pertains to other plants and equipment that may utilize the same or similar circuit breakers.