ENS 56679

v t e ENS Event
05:00 Jul 5, 2023
Title	Part 21 Report - Relay Mechanical Problem
Event Description	The following information is a synopsis provided by the licensee via facsimile: Cooper Nuclear Station completed an internal Part 21 evaluation concerning a batch of relays procured under the same purchase order from General Electric Hitachi. Following the failure of a relay, an independent laboratory identified a mechanical problem with the hinged armature, resulting in the relay potentially failing to return to its de-energized state. The relays are not currently installed in a safety related application. The NRC Resident has been notified. A written notification will be provided within 30 days. Affected known plants include only Cooper at the time of the notification.

ENS 56679 +/-
Where
Cooper Nuclear Power Plant Brownville, Nebraska (NRC Region 4)
Organization:	Cooper Nuclear Power Plant
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+992.33 h41.347 days <br />5.907 weeks <br />1.359 months <br />)
Opened:	David Van Der Kamp 13:20 Aug 15, 2023
NRC Officer:	Brian P. Smith
Last Updated:	Aug 15, 2023
56679 - NRC Website
v • d • e

v t e Emergency Notification System
Cooper Nuclear Power Plant with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR2023-07-05T05:00:00 [Table view]
[ENS list for Cooper Nuclear Power Plant]

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