ML20217C248

Potential Part 21 Rept Re Failure of Siemens Circuit Breaker to Close Latch in Test Position W/Ge Test Flag Installed. Cause Indeterminate.Will Ship Identified Circuit Breakers to Siemens Mfg Facility in Wendell,Nc for Checking Procedure

ML20217C248
Person / Time
Site:	Arkansas Nuclear
Issue date:	04/21/1998
From:	Smith E WYLE LABORATORIES
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9804230253
Download: ML20217C248 (6)

Text

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Wyle Reference No.: 455105448 l l April 21,1998 Post-It' brand fax transmittal memo 7671 8 of poses

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Subject:

Siemens Circuit Breaker Potential Part 21

Reference:

Entergy Operations, Inc (EOI) PO No. 962027 - Safety Related Siemens 4KV, 350 MVA,1200 A Circuit Breakers Dear Sirs- 4 i

Pursuant to the 10 CFR Part 21 requirements, this letter notifies the NRC of a Potential Part l 21 condition. We are attaching Notice of Anomaly (NOA) No. 8 foryourinformation. This NOA is issued on Wyle Job No. 45510.

Wyle/Slemens will complete the specified evaluation of the circumstances documented in NOA l No. 8 within sixty (60) days of discovery of the potential defect. The NRC will be provided a l copy of Wyle's evaluation report.

l 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.

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Edward W. Smith Director, Contracts & Purchasing l 9804230253 980421 PDR ADOCK 05000313

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p i Wyle Laboratories. Inc. 7800 Hlohway 20 West P O Row 077777 Huntsvilla At 35A07.7777 Tal- (7MUL17.ad11

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NOTICE OF ANOMALY QQ Date: April 17,1998 NOTICE NO: 8 PO NUMBER: _ 962027 CONTRACT NO: NA l

CUSTOMER: Enteroy Operations. Inc. (EOl) / Arkanses Nuclear One (ANO) WYLE JOB NO: 45510 -

I NOTIFICATION MADE TO: D. Shehadeh NOTIFICATION DATE: 4/7/98 NOTIFICATION MADE BY: J. Fitzer VIA: in person CATEGORY: E SPECIMEN OPROCEDURE O TEST EQUIPMENT DATE OF ANOMALY: 4/7/98 l

PART NAME: Siemens 4KV,350 MVA.1200A Circuit Breaker PART NUMBER: 5-3AF-GER 350-1200-78 10 NO: Wyle Bar-code No. 4551053AFGER350BKR006, Siemens Serial Number R-92154A-1 TEST: POST INSTALLATION OF INTERLOCK KIT SIEMENS PART # 18-831-030-502 FUNCTIONAL TEST SPECIFICATION: EOl Specification No. E-2451. Paragraphs 7.2.5 and 7.2.9 REQUIREMENTS:

1. Reference EOl Specification No. E-2451, Paragraph 7.2.5. " Removable connecting rod shall be provided to enable operation of the mechanism operated auxiliary contac*.s (MOC) when the breaker is in test i position."

2. Reference EOl Specification No. E-2451. Paragraph 7.2.9, "All breakers shall be equipped so that the stored energy mechanism discharges when the breaker is withdrawn from the cubical

DESCRIPTION OF ANOMALY

1. The circu;t breakar 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.

2. The stored energy mechanism did not discharge when the breaker was withdrawn from the cubical.

Wyle Form WH 1066, Rev. JUL 94 Page 1 of 4 1

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1 DISPOSITION COMMENTS RECOMMENDATIONS:

_Backcround: Wyle.and Siemens personnel were on-site at EOl's ANO Nuclear Plant on April 7 and 8,1998, for ,

I the purpose of upgrading 1200 amp, 350 MVA Wyle/Siemens circuit breakers. The upgrade included I l

installation of P/N (Dwg. No.) 18-831-030-502, interlock Kit (contains modified cam) by a Siemens technician on .

a Siemens 1200 amp 350 MVA breaker, Siemens S/N R 92154A 1, in accordance with instructions on l '

Siemens P/N 18-494 382-803, Issue 01, Sheets 1 and 2F Field Mod - Plunger interlock for Mark 802. Siemens P/N 18-831-030-503, Issue 01, Plunger Assy GER (Kit) lists the individual components contained in the Intertock Kit.

The installation was to be performed per Siemens Drawing 18-494-382-803, issue 01, Sheet 2F, Dimension B, and Drawing 18-891-030-503, Issue 01, Sheet 1F, Detail B, using an approved EO! maintenance order and l under tne supervision of EOl and Wyle personnel The EOl breakers were designated by Wyle/Siemens to be upgraded due to conditions observed on similar Slemens circuit breakers in non-safety-re!ated applications at Public Service Electric & Gas.

l Wyle noted the Siemens technician did not install the kit per Siemens Drawing 18-494-382-803-01, Sheet 2F, l Dimension B. The original hole in the cover had to be enlarged to allow passage of the new adjustable rod. l Additionally. Siemens Drawing 18-891-030 503-01, Sheet 1F, Detail B shows the adjustable rod connected to i the inner hole on the cam crank arm. The Siemens technician had to move the adjustable red to the outer h' ele l to obtain the necessary plunger travel to drive the cubicle-mounted GE 52STA switch.

l After kit installation, the circuit breaker was placed on the Switchgear Room floor and the plant-supplied GE test  !

flag was installed w!th a 0.125-inch gap at the 52STA plunger to simulate the most demanding condition of I required operation. The circuit breaker was manually charged and closed and correctly latched in the closed position. When tne manual close button was actuated with the breaker manually charged, the breaker tripped free and the attempted close operation caused some misalignment to occur in the newly installed cam ,

assembly. The plunger housing was out-of-level with the right side lower tnan the left side, and the camshaft l was cocked in the plunger housing assembly due to the movement of the shaft bearings. The Siemens '

technician realigned the abcVe parts.

The breaker was elevated to its safety related, ful!y connected position. The breaker was electrically charged, manually closed, and manually tripped 12 times while operating the 52STA switch, it successfully latched closed each time.

The breaker was electrically lowered from its connected position to the floor, it was observed that the positive tnp free feature c;d not cause the closing springs to discharge. Numerous attempts to correctly adjust the ,

breaker-mounted pcsitive interlock switch (PIS) roller were all unsuccessful. l The circuit breaker identifled above along with nine additional circuit breakers will be shipped from EO! to the Siemens manufacturing facility at Wendell, North Carolina where they will undergo a checking procedure per Attachment 1. This procedure shall be performed under Wyle and Siemens QA supervision and no deviation is allowed without Wyle approval. Wyle and Siemens will analyze the data gained frcm the above procedure, Siemens production records, and Wyle tesi records.

The results of the evaluation will c'etermine the course of action required, and the impact on qua!ification of the circuit breakers.

RESPONSIBILITY TO ANALYZE ANOMAllES AND COMPLY WITH 10CFR21; O CUSTOMER liil WYLE VERIFICATION: M/A.

DROJECT ENGINEER: f[p% - 7 r

TEST WITNESS: b deMoAd PROJECT MANAGER: w ra. fj#41llM INTERDEPARTMENTAb REPRESENTING: E.or COORDINATION: N 4. it .[4 R.

y-QUALITY ASSURANCE: Y-v fr Wyle Form WH 1066, Rev. JUL '94 Pace 2 of 4

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' NOTICE EF ANOMALY No. 8 PAGE 3 EF 4 APRIL 17,1994 7

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GENERAL INFORMATION or OTHER EVENT NUMBER: 34113 LICENSEE: WYLE'LABdRATORIES, INC NOTIFICATION DATE: 04/21/98 CITY: REGION: 0 NOTIFICATION TIME: 15:36 [ET)

COUNTY: STATE: EVENT DATE: 04/21/98

LICENSE #: AGREEMENT: EVENT TIME: 12:00[EDT]

DOCKET: LAST UPDATE DATE: 04/21/98 NOTIFICATIONS ELMO COLLINS RDO NRC NOTIFIED BY: EDWARD W. SMITH VERN HODGE NRR l HQ OPS OFFICER: DICK JOLLIFFE EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION:

CCCC 21.21 UNSPECIFIED PARAGRAPH EVENT TEXT

- POTENTIAL 10CFR PART 21 REPORT -

ON 04/07/98, WYLIE LABORATORIES, INC AND SIEMENS CORPORATION PERSONNEL INSTALLED AN INTERLOCK KIT TO UPGRADE WYLIE/SIEMENS SAFETY RELATED 4 KV, 350 MVA, 1200 AMP CIRCUIT BREAKERS AT ARKANSAS UNITS 1 AND 2. THIS UPGRADE WAS BEING INSTALLED DUE TO CONDITIONS OBSERVED ON SIMILAR SIEMENS CIRCUIT BREAKERS IN NON-SAFETY RELATED APPLICATIONS AT SALEM / HOPE CREEK.

HOWEVER, THE SIEMENS TECHNICIAN DID NOT INSTALL THE KIT INTO THE CIRCUIT ,

BREAKER PER THE APPROPRIATE SIEMENS DRAWING. THE IDENTIFIED CIRCUIT BREAKER, ALONG WITH NINE ADDITIONAL CUICUIT BREAKERS WILL BE SHIPPED FROM ARKANSAS TO THE SIEMENS MANUFACTURING FACILITY AT WENDELL, NORTH CAROLINA WHERE THEY WILL UNDERGO AN APPROVED EVALUATION PROCEDURE.

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

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