ML17265A760

Part 21 Rept Re W2 Switch Supplied by W Drawn from Stock, Did Not Operate Properly After Being Installed on 990409. Switch Returned to W on 990514 for Evaluation & Root Cause Analysis

ML17265A760
Person / Time
Site:	Ginna
Issue date:	10/05/1999
From:	Widay J ROCHESTER GAS & ELECTRIC CORP.
To:	NRC
References
REF-PT21-99 NUDOCS 9910070274
Download: ML17265A760 (11)

Text

CATEGORY REGULAJ Y INFORMATION DISTRIBUTIO SYSTEM (RIDS)

ACCESSION NBR:9910070274 DOC.DATE: 99/10/05 NOTARXZED: NO DOCKET FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH. NAME AUTHOR AFFILIATION WIDAY,J.A. Rochester Gas & Electric Corp.

RECIP NAME .~ RECIPIENT AFFILIATION NRC - No Detailed Affiliation Given

SUBJECT:

Part 21 rept re W2 switch supplied by W drawn from stock did not operate properly after being installed on 990409.

Switch returned to W on 990514 for evaluation & root cause analysis.

DISTRIBUTION CODE: IE19T COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Part 21 Rept (50 DKT)

E NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72). 05000244 G

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME ,

LTTR ENCL ID CODE/NAME LTTR ENCL VISSING,G 1 INTERNAL: FILE CENTER 01 NRR/DIPM/IQMB 1 NRR/DRIP/REZB 1 PDR WARD, M. .1 RES/DET/ERAB' RGN1 1 RGN2 RGN3 1 RGN4 EXTERNAL: INPO RECORD CTR NOAC SILVER,E NRC PDR NUDOCS FULL TXT D 0

'E NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE LISTS DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COPIES REQUIRED: LTTR P ENCL 14

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/ t ROCHESTER GAS AND ELECTRIC CORPORATION ~ 89 EAST AVENUE, ROCHESTER, N.Y. y4649-Orgy TCLCillONC secs cooc vie S46 2700 October 5, 1999 U.S. Nuclear Regulatory Commission Operations Center Facsimile Number 301-816-5151 Telephone Number 301-816-5100

Subject:

Initial Notification of 10 CFR Part 21 Defect R.E. Ginna Nuclear Power Plant Docket No. 50-244 1

The enclosed initial notification is provided in accordance with 10 CFR Part 21, Reporting of Defects and Noncompliance, Section 21 (d) (3) (I), which requires "Initial notification by facsimile". Written notification, in accordance with 10 CFR Part 21, Section 21 (d) (3) (ii), will be provided by November 4, 1999.

Very truly yours, se A. Widay Enclosures 9910070274 99%005 PDR ADOCK 05000244 j 8 PDR

10CFR21 INITIALFACSIMILE NOTIFICATION I. NAME AND ADDRESS OF THE INDIVIDUALINFORMING THE COMMISSlON:

4 Joseph A, Widay NAME'.

Vice President and Plant Manager ADDRESS: Rochester Gas k Electric Corporation 89 East Avenue Rochester, New York 14649 IDENTIFICA.'DON OF THE FACILITY,THE'ACTIVITY,OR THE BASIC COMPONENT SUPPLIED FOR SUCH FACILITYWIGCH FAILS TO COMPLY OR CONTAINS A DEFECT:

The basic component is a W2 switch, supplied by Westinghouse Electric Corporation. This was purchased safety-related for use in various locations at Ginna Station. 'omponent IIL IDENTIFICATIONOF THE FIRM CONSTRUCTING THE FACILITYOR SUPPLYING THE BASIC COMPONENT WHICH FAILS TO COMPLY OR CONTAINS A DEFECT:

The W2 switch was supplied to Rochester Gas and Electric Corporation (RGkE) by Westinghouse Electric Corporation;

. Westinghouse Electric Corporation 200 Cheswick Avenue Cheswick, PA 15024 IV. l NATURE OF THE DEFECT OR AILURE TO COMPLY AND THE SAFETY HAZARD WHICH IS CREATED OR COULD BE CREATED BY SUCH DEFECT OR FAILURE TO COMPLY:

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The deficiency was detected by RGB'uring a corrective maintenance work order. A safety-related W2 switch drawn from stock did not operate satisfactorily after being installed in the Main Control Board for use as the control switch for Safety Injection Pump lC (1/SIP1C2). The switch did work properly before installation in the Main Control Board position. However, subsequent to installation the switch mechanism would bind and would not spring return to the "after close" or "aAer trip" positions. The switch is expected to function properly in both positions.

l The Substantial Safety Hazard created by the switch potentially being stuck in the "trip" position is that the associated ECCS pump circuit breaker would not auto-close following a Safety Injection Actuation System (SI) signal; therefore, the associated ECCS pump would not perform its safety function. This postulated failure, in conjunction with another postulated single'failure, could cause a loss of safety function for the ECCS System.

Ifthe associated ECCS pump was operating, such as during testing, the switch being stuck in the "close" position would prevent the associated ECCS pump breaker from auto-closing if an undervoltage condition occurred coincident with a SI signal. This could cause the breaker to lock-out and prevent the pump from performing its safety function.

RGB'onsiders the nature of the defect to be a manufacturing deficiency. Westinghouse Electric Corporation was unable to provide the requested evaluation and results at this time.

Therefore, RGB'as reached the following conclusions:

Upon inspection of the deficient W2 switch, there appeared to be a small gap between the metal mounting face plate and the switch mechanism. This gap appeared to be the result of the plate being slightly oversized. Therefore, when the switch was installed in the Main Control Board, it would slightly compress and cause'the switch shaft to bind on its bushing.

Additionally it may also have been due to the bushing neck not being deep enough and causing the faceplate to bow upon installation against a solid surface, thus causing the shaft to bind.

V. THE DATE ON WHICH THE INFORMATION OF SUCH DEFECT OR FAILURE TO COMPLY WAS OBTAINED:

The information was obtained on April 9, 1999, during the implementation of a corrective maintenance work order to replace the W2 switch in the Main Control Board for Safety Injection Pump 1C (1/SIP1C2). This is a follow-up report to the 10CFR21 Substantial Safety Hazard Evaluation Interim Report submitted by RGEcE on May 27, 1999.

IN THE CASE OF A BASIC COMPONENT WHICH CONTAINS A DEFECT OR FAILS TO COMPLY, THE NUMBER AND LOCATION OF ALL SUCH COMPONENTS IN USE AT, SUPPLIED FOR, OR BEING SUPPLIED FOR GINNA STATION:

There are numerous W2 switches of this model number permanently installed at Ginna Station, all of which are operating satisfactorily. The deficient W2 switch was installed in the Main Control Board for Safety Injection Pump 1C (1/SIP1C2). The deficient switch is one of two switches RGB purchased from Westinghouse per PO¹ NQ-15824-A-3W. The other %2 switch procured under this purchase order is currently installed for the Diesel Generator A Supply Breaker (1/EGIA1) and performs satisfactorily.

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0 VII. THE CORRECTIVE ACTION WHICH HAS BEEN, IS BEING, OR WILLBE TAKEN; THE NAME OF THE INDIVIDUALOR ORGANIZATIONRESPONSIBLE FOR THE ACTION; AND THE LENGTH OF TIME'THATHAS BEEN OR WILLBE TAKEN TO COMP'f.ETE THE ACTION:

After the deficiency was discovered by RGAE, the deficient W2 switch was returned to Westinghouse on May 14, 1999, for evaluation and root cause analysis. To date, RGEcE has not received the results from Westinghouse, but will ultimately have the deficien W2 switch replaced by Westinghouse. An acceptable W2 switch was obtained from stock and installed in the Main Control Board for Safety Injection Pump 1C(l/SIP1C2). The second switch that was procured Rom Westinghouse per the sanie purchase order is installed for the D/G A Control Switch (1/EG1A1) and functions satisfactorily. This switch is tested on a monthly basis. A visual inspection of W2 switches was performed on the current stock at Ginna Station. The results of this inspection were satisfactory, with no gaps being identified between the metal mounting face plate and the mechanism.

VIII. ANY ADVICE RELATED TO THE DEFECT OR FAILURE TO COMPLY ABOUT THE FACILITY,ACTIVITY,OR BASIC COMPONENT THAT HAS BEEN, IS BEING, OR WILLBE GIVEN TO PURCHASERS OR LICENSEES:

None TOTAL P.83

0 10/0$/$999 US. Nuc Regularory Commission Operations Cenrer ilReporr P~ae 1 Power Reactor Event 4 36261 Site: GINNA Notification Date / Time: 10/05/1999 08:54 (EDT)

Unit: 1 Region: 1 State: NY Event Date /Time: 10/05/1999 08:54 (EDT)

Reactor Type.'1] 5-2-LP Last Modification: 10/05/1 999 Containment Type: DRY AMB NRC Notified by: JOE WIDAY Notifications: JOHN KINNEMAN R1 HQ Ops Officer: JOHN MacKINNON VERN HODGE NRR Emergency Class: NON EMERGENCY 10 CFR Section:

21.21 UNSPECIFIED PARAGRAPH Unit Scram Code RX Crit Init Power Initial RX Mode Curr Power Current RX Mode Yes 100 Power Operation 100 Power Operation W2 SWITCH SUPPLIED BY WESTINGHOUSE DRAWN FROM STOCK DID NOT OPERATE PROPERLY AFTER BEING INSTALLED.

W2 SWITCH WAS SUPPLIED TO ROCHESTER GAS AND ELECTRIC CORPORATION BY WESTINGHOUSE ELECTRIC CORPORATION. A SAFETY RELATED W2 SWITCH WAS DRAWN FROM STOCK DID NOT OPERATE SATISFACTORILYAFTER BEING INSTALLED IN THE MAIN CONTROL BOARD FOR USE AS THE CONTROL SWITCH FOR. SAFETY INJECTION PUMP 1C (1/SIP1 C2). THE SWITCH DID WORK PROPERLY BEFORE INSTALLATIONIN THE MAIN CONTROL BOARD POSITION. HOWEVER, SUBSEQUENT TO INSTALLATIONTHE SWITCH MECHANISM WOULD BIND AND WOULD NOT SPRING RETURN TO THE "AFTER CLOSE" OR "AFTER TRIP" POSITIONS. THE SWITCH IS EXPECTED TO FUNCTION PROPERLY IN BOTH POSITIONS.

THE SUBSTANTIALSAFETY HAZARD CREATED BY THE SWITCH POTENTIALLYBEING STUCK IN THE "TRIP" POSITION IS THAT THE ASSOCIATED ECCS PUMP BREAKER WOULD NOT AUTO-CLOSE FOLLOWING A SAFETY INJECTION ACTUATION SYSTEM (Sl) SIGNAL; THEREFORE, THE ASSOCIATED ECCS PUMP WOULD NOT PERFORM ITS SAFETY FUNCTION. THE POSTULATED FAILURE, IN CONJUNCTION WITH ANOTHER POSTUALTED SINGLE FAILURE, COULD CAUSE A LOSS OF SAFETY FUNCTION FOR THE ECCS SYSTEM.

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