ENS 51123

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v t e ENS Event
05:00 Jun 4, 2015
Title	Part 21 - Potential Failure of a Time Relay
Event Description	The following was received via facsimile: Allen Bradley relay base model 700RTC contains an unevaluated CPLD (Complex Programmable Logic Device). This was an unpublished design change that did not result in a part number change from Allen Bradley. There was no change to the appearance of the relay that would identify any design changes made to the relay configuration. Allen Bradley has indicated that the change occurred in mid-2009 and that it was a rolling change with no specific manufacturing date to distinguish between the old and new configuration. Based on this information, all units manufactured during 2009 and later are suspect. Nutherm International, Inc. has concluded its review of all procurements of the 700RTC series relays and have found two (2) units manufactured during or after 2009 dedicated and shipped to customers. The following facility was determined to be impacted by this condition: Utility: Exelon Plant: Quad Cities Purchase Order: 00447625 Part Number: 700-RTC11110U1 Nutherm Traceability Number: 11340-02R01 1/01, 11340-02R01 1/02. In a separate 10CFR Part 21 notification, Event Number 51095, reported to the NRC [on] 5/28/2015 indicated that the CPLD can be affected by electrical noise from operation of nearby relays which can reset the timing of the relay. The plant should evaluate whether the installed relays are subjected to unevaluated EMI/RFI [electromagnetic interference/radio-frequency interference] conditions when installed in the plant.

ENS 51123 +/-
Where
Nutherm International, Inc Mount Vernon, Illinois (NRC Region 3)
Organization:	Nutherm International, Inc
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+9.57 h0.399 days <br />0.057 weeks <br />0.0131 months <br />)
Opened:	Tom Sterbis 14:34 Jun 4, 2015
NRC Officer:	Dong Park
Last Updated:	Jun 4, 2015
51123 - NRC Website
v • d • e

v t e Emergency Notification System
Nutherm International, Inc with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR		Part 21 Report - Continuously Energized Eaton D26 Relays 2022-06-16T05:00:00 [Table view]
[ENS list for Nutherm International, Inc]

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