ML14134A121

Notification of Potential Part 21 - Potential Defect in General Electric Type CR120AD Control Relays

ML14134A121
Person / Time
Site:	Cooper
Issue date:	05/09/2014
From:	Thelen M Qualtech NP
To:	Office of Nuclear Reactor Regulation
References
50015
Download: ML14134A121 (3)

Text

0510912014 U.S. Nuclear Regaulatorv Commission OperationsCenter Event Report Paee I Part 21 (PAR) Event# 50015 Rep Org: QUALTECH NP Notification Date I Time: 04/09/2014 15:21 (EDT)

Supplier: QUALTECH NP Event Date I Time: 04/09/2014 (CDT)

Last Modification: 05/09/2014 Region: 1 Docket #:

City: HUNTSVILLE Agreement State: Yes County: License #:

State: AL NRC Notified by: MATTHEW THELEN Notifications: MALCOLM WIDMANN R2DO HQ Ops Officer: STEVE SANDIN JAMES DRAKE R4DO Emergency Class: NON EMERGENCY NRR PART 21 GROUP EMAIL 10 CFR Section:

21.21(d)(3)(i) DEFECTS AND NONCOMPLIANCE PART 21 - POTENTIAL DEFECT IN GENERAL ELECTRIC TYPE CR120AD CONTROL RELAYS

The following information was received via fax:

"This letter is being issued by QualTech NP, Huntsville, AL, to provide an initial notification to the Nuclear

ýRegulatory Commission and Nebraska Public Power District [NPPD] Cooper Nuclear Station concerning a

-potential defect in General Electric Type CR120AD control relays. A failure analysis revealed that the most likely iinitiator of the failure was a flaw or defect in the start wrap of the magnet wire. The flaw created an arc that

'involved windings directly beneath the start wrap which resulted in an open circuit on the coil windings. This failure iis classified as infant mortality, which is similar to the failure mode identified in the 10 CFR part 21 30 day report

'(accession number 9706190261) dated June 12, 1997 submitted by GPU Nuclear.

"Investigation of documents dating back to 1997 revealed that the manufacturer issued an informal recommendation to detect infant mortality in these relays by performing burn-in testing and mechanical cycle aging

of the relay. QualTech NP, in conjunction with NPPD, determined that the risk of infant mortality can be mitigated

'by subjecting these relays to a 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> burn-in and performance of 100 mechanical cycles prior to installation.

,"It has been confirmed that only two orders, with two units each, for this particular relay are affected. Both orders

have been shipped to Nebraska Public Power District as requested by purchase orders 4500149953 and 14500142705. All subject relays shall be subjected to a 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> bum-in and exposed to 100 mechanical cycles or

,returned to QualTech NP for replacement.

"Additional details will be provided in the formal written report. Please contact Matthew Thelen at 256-924-7441 (office) or mthelen@curtisswright.com for additional information.

0510912014 U.S. Nuclear Regulatory Commission Operations Center Event Report Page 2 "Matthew Thelen Project Manager QualTech NP Huntsville Operations a business unit of Curtiss-Wright Flow Control Company http://qualtechnp.cwfc.com"

• *

• UPDATE AT 1707 EDT ON 05/09/14 FROM MATTHEW THELEN TO S. SANDIN VIA FAX ***

"(File No.: QTHuntsville 10CFR21-2014-01)

"To whom it may concern:

"This letter is being issued by QuaiTech NP, Huntsville Operations to provide a final notification to the Nuclear Regulatory Commission and Nebraska Public Power District (NPPD) Cooper Nuclear Station concerning a potential defect in General Electric Type CR120AD control relays.

"Replacement relays have been provided to NPPD. All required dedication procedures at QualTech NP have been revised to include a 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> burn-in and 100 mechanical cycles in an effort to detect infant mortality. No further actions are required at this time.

"This 10CFR part 21 file is closed."

Notified R2DO (Bonser), R4DO (Whitten) and NRR Part 21 Group via email.

D 05/09/2014 17:07 2567229670 EGS PAGE 01/01 QualTech NP Nuclear Division 125 West Park Loop NW, CURTISS - Huntsville, AL 35806 T: 256.722.8500 1F: 256.722.8533 WRIGHT http://qualtechnp.cwfc.com May 9, 2014 (File No.: QTHuntsville 10CFR21-2014-01)

To whom it may concern:

This letter is being issued by QualTech NP, Huntsville Operations to provide a final notification to the Nuclear Regulatory Commission and Nebraska Public Power District (NPPD) Cooper Nuclear Station concerning a potential defect in General Electric Type OR 120AD control relays.

Replacement relays have been provided to NPPD. All required dedication procedures at QualTech NP have been revised to include a 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> bum-in and 100 mechanical cycles in an effort to detect infant mortality. No further actions are required at this time.

This 10CFR part 21 file is closed.

Sincerely, Matthew Thelen Project Manager (256) 924-7441 mthelen@curtisswriphtcom QualTech NP, Huntsville Operations a business unit of Curtiss-Wright Flow Control Company http://qualtechnp.cwfo.com