ML20198Q696

Part 21 Rept Re Failed Operation of Agastat EGPI004 Relay on 971129,as Reported by Limerick Station.Caused by Insufficient Soldering.Will Notify Customers Who Purchased EPI004 & ETR14XXX004 Relays During June 1996

ML20198Q696
Person / Time
Site:	Limerick
Issue date:	01/12/1998
From:	Souden R AFFILIATION NOT ASSIGNED
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9801230118
Download: ML20198Q696 (1)

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• THOMAS & BETTS 1622B FLIGHT PATH DRfVE BRooKSViLLE,TL 346d2 Tf Lt3621799 4tto o 'FAXt3021739 9E37 Thomas @Betts January 12,1998 Document Control Desk U.S. Nuclear Regulatory Cornmission W;shington, DC 20555 REF: 10t/ a . 21 NONCOMPLIANCE REPORT To whom it may concern:

PECO Energy Company s, Limerick Station reported an Agastat* EGPl004 relay failed to operate as intended on Nov:mber 29,1997, subsequent analyses of PECO's storeroom by their Corporate Laboratory, Thomas & Betts' in process orders and an on site surveillance by a PECO team on January 6 8,1998 resulted in the following conclusions.

1. Insufficient solder as rneasured against IPC-A 0108, type 2 was the cause of failures.

2. Soldering discrepancies included one (1) intermittent connection through an eyelet and two (2) no solder on one component lead. Two (2) of the conditions could result in the relay not operating as specified and the third would not protect against a line voltage surge, if required,

3. Insufficient solder joints were discovered in three (3) different manufacturing date codes (9721,9739 and 9743). The date code !2 the week of manuf acture and is an integral part of the serial number.

4. Soldering of the ETR14X,X,X,004 (X X.X = operating voltage, timing adjustment, timing range) has also been included in this notification since they are soldered on the same line. However, there have been no functional f alutes reported on any ETR relays to date. Short term corrective action has been implemented and the plan for the long term corrective has been established.

Notification will be given to all customers that have purchased EGPl004 and ETR14XXX004 relays since tha Agastat* production hne was moved from Punta Gorda, FL to Brooksville, FL. in June 1990. This will bo done even though there is no evider:ce the issue goes beyond the date codes listed above.

845 nuclear (EGPl004) and 348 nuclear (ETR14XXX004) relays were shipped during this time frame. There have been no other reported problems for these relays during this period.

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dbert Souden \ Mh Quihty Manager c: Karl Nichter Anita Nobles Arguelles Nuclear customers [( I b ' g 9001230118 980112 "

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