ENS 56683

v t e ENS Event
04:00 Jun 22, 2023
Title	Part 21 Interim Report - Failure of Curtiss Wright Supplied Safety Related Relay
Event Description	The following is a summary of the Part 21 report provided by Curtiss Wright: On June 20, 2023, Duke Energy sent a letter to Curtiss Wright (CW) to formally notify them that a Tyco (Agastat) relay had failed. Duke Energy had identified certain contacts that were found sticking in the open position. The relay was returned to CW for evaluation; however, CW could not duplicate the failure. As the relay is questionable for reliable service, CW is having the relay returned to Tyco for their evaluation. Once the evaluation is complete, the current report will be updated. CW anticipates an update to the notification with final results by October 15th. Affected plant: Catawba * * UPDATE ON OCTOBER 5, 2023 AT 1146 EDT FROM JENNIFER HARRISON TO KAREN COTTON * * * The following information was provided by Curtiss Wright via email: The relay was subsequently returned to TYCO for their evaluation. TYCO tested the relay with and without the LL auxiliary switch option and could not duplicate the failure. In all tested conditions, the relay performed within manufacturer specifications, and with no contact binding. As the noted failure could not be reproduced by Curtiss-Wright or TYCO, there is no evidence of part malfunction and thus no further evaluation or notification applies. Notified RDO2 (Miller) and Part 21/50.55 Reactors

ENS 56683 +/-
Where
Curtiss Wright Flow Control Co. Cincinnati, Ohio (NRC Region 3)
Organization:	Curtiss Wright Flow Control Co.
Reporting

10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
Time - Person (Reporting Time:+1353.28 h56.387 days <br />8.055 weeks <br />1.854 months <br />)
Opened:	Tim Franchuk 13:17 Aug 17, 2023
NRC Officer:	Karen Cotton-Gross
Last Updated:	Oct 5, 2023
56683 - NRC Website
v • d • e

v t e Emergency Notification System
Curtiss Wright Flow Control Co. with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
WEEKMONTHYEAR2025-05-21T04:00:00 [Table view]
[ENS list for Curtiss Wright Flow Control Co.]

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