ML20249B779

Part 21 Rept Re Findings,Resolutions & Conclusions Re Failure of Safety Related Siemens 4KV,350 MVA,1200 a Circuit Breakers to Latch Closed

ML20249B779
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/22/1998
From:	Smith E WYLE LABORATORIES
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9806240191
Download: ML20249B779 (4)

Text

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. L_A U g [, dA o- IW Pf }h Wyle Reference No.: 45510B-050 June 22,1998 Post-it* Fax Note 7671 D"4/J.2/jf'Ms* 2

• • f/2eJhrsran Crr "*"F' 2vkh /c/&nrd CoJDept. Co.

Phonee Ph p yy Wb//Dpsw/  %/no :us Document Control Desk '

U.S. Nuclear Regulatory Commission.. .-

Washington, DC 20555

Subject:

Siemens Circuit Breaker Potential Part 21

Reference:

1. Entergy Operations, Inc. (EOI) PO No. 062027 - Safety Related Siemens 4KV,350 MVA,1200 A Circuit Breakers

2. Wyie Laboratories Potential Part 21 Notification Letter 45510B-48 dated April 21,1998

Dear Sirs:

Pursuant to the 10 CFR Part 21 requirements, this letter provides the findings, resolutions, and conclusions pertaining to Potential Part 21 notification contained in Wyle's 4/21/98 letter along with Notice of Anomaly (NOA) No. 8.

The equipment was supplied to Entergy Operations Inc. (EOl), Russe!!ville, AR under EOI PO No. 982027. NOA No. 8 included two anomalies that are reprinted and resolved as fo!!ows:

Anomaly No.1: The circuit breaker did not latch closed in the test position with the GE test flag installed. As a result, the MOC did not maintain a change of state condition Resolution No.1: The Siemens vacuum circuit breakers should utilize a Siemens test flag.

However, the Siemens flag had not been provided with the breakers to EOI. Subsequent testing at Siemens using the GE test flag also resulted in failure of the breakers to latch closed. In addition, Siemens and Wyk had not supplied EOl with adequate installation and test procedures that may have prevented this occurrence. Now manuals are in preparation, which will provide satisfactory installation and test procedures.

The Siemens test flag has been t(sted on EOI 5 KV and 7KV breakers at Siemens and proven to operate adequately. The conclusions are that: (1) The util.: ties should not attempt to use the GE test flag with the Siemens replacement vacuum breakers and (2) Siemens/Wyle will provide new procedures for the installation and test of the breakers with the Siemens' test flag.

Anomaly No. 2: The stored energy mechanism did not discharge when the breaker was withdrawn from the cubical. \

Resolution No 2: Provisions for adequate adjustments of the positive interlock switch roller I have been added to the design which resoVes this anomaly.

9006240191 900622 b PDR ADOCK 05000313 S PDR-Wyle Laboratories,Inc. 7800 Highway 20 West P.O. Bcx 077777 Huntsvi!!e, AL 35807 7777 Tet (256)837-4411

l j Wyle Letter No. 455108 050 To: Nuclear Reguistory Commi:si:n June 22,1998 Pzgo 2 I.

Neither of the two anomalies described above affect the circuit breakers operwoulty wneo the breake/ is in its connected position, i.e., the position required for the breaker to perform its safety-related function. Therefore, a Part 21 condition does not exist.

If you have any questions, please feel free to contact me by phone (256/837-4411, extension 271), FAX (256/830-2109), or e-mail (esmith@hnt.wylelabs.com).

Sincerely, Wyle Laboratories, Inc.

wa W. S ith Director, Contracts & Purchasing l

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k2ERALINFORMATIONorOTHER EVENT NUMBER: 34113 CENSEE: WYLE LABORATORIES, INC NOTIFICATION DATE: 04/21/98 CITY:

• REGION: 0 NOTIFICATION TIME: 15:36 [ET)

COUNTY: STATE: EVENT DATE: 04/21/98 l CENSE #: AGREEMENT: EVENT TIME: 12 : 00 [EDT]

DOCKET: LAST UPDATE DATE: 06/22/98 NOTIFICATIONS ELMO COLLINS RDO 1C NOTIFIED BY: EDWARD W. SMITH VERN HODGE NRR 9 OPS OFFICER: DICK JOLLIFFE ERGENCY CLASS: NOT APPLICABLE

) CFR SECTION:

lCC 21'.21 UNSPECIFIED PARAGRAPH EVENT TEXT POTENTIAL 10CFR PART 21 REPORT -

2 04/07/98, WYLE LABORATORIES, INC AND SIEMENS CORPORATION PERSONNEL ESTALLED AN INTERLOCK KIT TO UPGRADE WYLE/SIEMENS SAFETY RELATED 4 KV, 50 MVA, 1200 AMP CIRCUIT BREAKERS AT ARKANSAS UNITS 1 AND 2. THIS UPGRADE RS BEING INSTALLED DUE TO CONDITIONS OBSERVED ON SIMILAR SIEMENS CIRCUIT

@EAKERS IN NON-SAFETY RELATED APPLICATIONS AT SALEM / HOPE CREEK.

lCWEVER, THE SIEMENS TECHNICIAN DID NOT INSTALL THE KIT INTO THE CIRCUIT MEAKER PER THE APPROPRIATE SIEMENS DRAWING. THE IDENTIFIED CIRCUIT MEAKER, ALONG WITH NINE ADDITIONAL CIRCUIT BREAKERS WILL BE SHIPPED FROM MKANSAS TO THE SIEMENS MANUFACTURING FACILITY AT WENDELL, NORTH CAROLINA MERE THEY WILL UNDERGO AN APPROVED EVALUATION PROCEDURE.

MIS REPORT IS CLASSIFIED AS A POTENTIAL 10CFR PART 21 REPORT.

• • • UPDATE ON 06/22/98 @ 1800ET BY ED W. SMITH TAKEN BY MACKINNON***

ME FOLLOWING INFORMATION COMES FROM A FACSIMILE SENT.BY WYLE LABS:

THE ABOVE EQUIPMENT WAS SUPPLIED TO ENTERGY OPERATIONS INC. (EOI),

WSSELLVILLE, AR UNDER EOI PO NO. 962027. NOA NO. 8 INCLUDED TWO ANOMALIES HAT ARE REPRINTED AND RESOLVED AS FOLLOWS:

1 ANOMALY NO. 1: THE CIRCUIT BREAKER DID NOT LATCH CLOSED IN THE TEST l

@SITION WITH THE GE TEST FLAG INSTALLED. AS A RESULT , THE MOC DID NOT SINTAIN A CHANGE OF STATE CONDITION.

(Continued on next page) b i

. .a

'lCENS$2:

a WYLE LABORATORIES, I PAGE # 2 OF EVENT NUMBER: 34113

" RESOLUTION NO. 1: THE SIEMENS VACUUM CIRCUIT BREAIG'RS SHOULD UTILIZE A SIEMENS TEST FLAG. HOWEVER, THE SIEMENS FLAG DID NOT PROVIDE WITH THE BREAKERS TO EOI. SUBSEQUENT TESTING AT SIEMENS USING THE GE TEST FLAG ALSO RESULTED IN FAILURE OF THE BREAKERS TO LATCH CLOSED. IN ADDITION, SIEMENS AND WYLE HAD NOT SUPPLIED EOI WITH ADEQUATE INSTALLATION AND TEST PROCEDURES THAT MAY HAVE PREVENTED THIS OCCURRENCE. NEW MANUALS ARE IN PREPARATION, WHICH WILL PROVIDE SATISFACTORY INSTALLATION AND TEST PROCEDURES.

"THE SIEMENS TEST FLAG HAS BEEN TESTED ON EOI 5 KV AND 7 KV BREAKERS AT SIEMENS AND PROVEN TO OPERATE ADEQUATELY. THE CONCLUSIONS ARE THAT: (1)

THE UTILITIES SHOULD NOT ATTEMPT TO USE THE GE TEST FLAG WITH THE SIEMENS REPLACEMENT VACUUM BREAKERS AND (2) SIEMENS/WYLE WILL PROVIDE NEW PROCEDURES FOR THE INSTALLATION AND TEST OF THE BREAKERS WITH SIEMENS' TEST FLAG.

" ANOMALY NO. 2: THE STORED ENERGY MECHANISM DID NOT DISCHARGE WHEN THE BREAKER WAS WITHDRAWN FROM THE CUBICAL.

" RESOLUTION NO. 2: PROVISIONS FOR ADEQUATE ADJUSTMENTS OF THE POSITIVE INTERLOCK SWITCH ROLLER HAVE BEEN ADDED TO THE DESIGN WHICH RESOLVES THIS ANOMALY" R4DO (BILL JONES) NOTIFIED AND A FAX SENT TO NRR VERN HODGE.

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