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9

June 25, 1992 '

ND3MNO:3323*

Page two.

cci Mr. T. T. Martin, Regional AdministratorUnited States Nuclear Regulatory Commission ,Region 1475 Allendale Road iKing of Prussia, PA 19406

C. A. Rotock, Ohio Edison76 S. Main Street ,Akron, OH 44308 ;

Mr. A. DeAgazio, BVPS Licensing Project ManagerUnited States Nuclear Regulatory CommissionWashington, DC 20555

,

Larry Rossbach, Nuclear Regulatory Commission,BVPS Senior Resident Inspector

Larry BeckCenterior Energy6200 Oak Tree Blvd.Independence, Ohio 44101-4661

INPO Records CenterSuite 1500 -1100 Circle 75 ParkwayAtlanta, GA 30339

G. E. Muckle,Factory Mutual Engineering680 Anderson Drive #BLD10Pittsburgh, PA 15220-2773

Mr. Richard JanatiDepartment of Environmental Resources-P. O. Box 2063

L 16th Floor, Fulton Building! Harrisburg, PA 17120

Director, Safety Evaluation & Control

L Virginia' Electric & Power Co.P.O. Box 26666- One James-River-Plaza

Richmond, VA 23261

W. Hartley-Virginia Power Company5000 Dominion Blvd.2SW Glenn Allen, VA 23060

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J. M. RiddleHalliburton NUSFoster Plaza 7661 Anderson DrivePittsburgh, PA~15220

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Juns 25, 1992IID3M!io 3323

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Pago three

Bill Wegner, consultant23 Woodlawn TerraceFredrickoburg, VA 22404

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LIP NSEE EVENT REPORT (LER) E|Ms*1s'UcEUi'o'e'U'o"/N Es'TS'vYvEt Rtco'RoSWsa

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AA.J REPORTS MANAGEME NT SR ANCH IP 630). U S NUCLE AR? -- NtGULATORY COMV'SSION. W A&MINGTON, DC 20'AB, AND TO;

|C /.OF MANAGEMI'N1 AND BUDGlit W ASwsNGTON,0C 70503THE PAPE94WO64K RLDUCTION PHOJECT (31500t04). OF F ICL

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' CtLity 8sAMS (1) - DOCit E 7 NVMtt R {3, PAGE(L

B2 aver Vaney Power Station Unit 2 o is Io |0 |o| 4| ; 2 i ]cFl 0 | 3;A f@ e .. _if, i r! bie C .0- '* - / Pump due to Breaker Failure

l . ". :/* NUM98R43) RtPORT DA78.76 OTHE R f ACILITitt INV . - (D tal:

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T P. Noonan, General Managor Nuclear Operations 4i 1, 2 643i 1;2 s|81 i ! iC**iPLET* ONE LINE FOR E ACH CUMPONENT F AILURE DESCMCD IN THtt REPORT 113)

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On -5/26/92, operetors removed the A Quench Sp ay Pump breaker._(Gould Inc.,~Model'5HK-3S0) from its bus for periodic testi..g.: Ac thr.: breaker was being removed, its closing springs were. found

= to--be discharged, Investigation determined _that normallyclosed ccctact. pair in the breaker's control device were o'se n .,With these contacts open, the charging motor would net Operate to7charge the closing springr. aftnr the breaker was opened. Review-f station documents showed that the breaker was last operated on4/23/92,- during.a pump test. Based on the above, the breaker'sclosing springs were apparently not 'harged fron 4/23/92 until5/26/92, resulting in the. pump being unable to be started andinoperabl.e during-this period. The breaker's_ control device wasreplaced and verified;to operate corractly. There were no safetyimplications due to d.is event. The other train of quench. spray

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_ operable throughout this event and capable of de-was- fullypressurizing- the containment in the event of an accident.--Additionally,..both trains of the recirculation spray containmentde-pressurization reystem were available and would he a auto-startea- approximately 10 minutes af ter quench spray init ; otion.

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LICENSEE EVENT REPORT (LER)' (5|n^','!d' V"JN7o"'j745' 47# ,*o'n" i"'!,TEXT CONTINUATION !?"",'",'c',",Pu^20My37 U/s"','!3D"v",' " Min'

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OP MAki.OEMEN T AND Sv0Glf,WASHINGTOa ,4NO 20503-s

P Acett1Y NAME Hs DOCIL ET NUMetR (2) LIR hWMSIR tst PAGE (31

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0|0 0|2 or 0|3 - ;Stavor Valley Powv Station Unit 2 - o p |o jo|o [4|1|2 9|2 0|0|8- _.texTam e m mcr,-m4wnn

Descriotion i

On .5/26/92, operators removed the A Quench Spray Pump brea.ker ifrom 'its b.1s for normal periodic testing. As the breaker wasbeing removed,: the operators noted that its closing springs were

; discharged. Operai ors then racked the breaker back onto the bus:and reenergized its control pcwer, but the closing springs didnot charge.- Without these springs charged, the breaker could notclose and could-not start the quench spray pump. The breaker was'then replaced with a spare. The closing springs of the sparebreaker __ did charge after it was racked onto the bus and its-control power energized. Operators verified proper breakerfunction by starting the A quench spray pump.

Cause of Event

Invectigation by Psintenance personnel discovered that a normally- ' closed contact ph.'c in the failed beeaker's control device were

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open. Without these contacts closed, the breaker's charging, - .motor could not operate-and would not charge the-closing springs, iNThis control device is a sealed unit and not adjustable on site.The. control device was replaced and the breaker was verified tofunction . properly.- The involved breaker was manufactured by

=.G o u l d , Inc., operated on a 4KV-bus and was-model number 5HK-350.

P;;evious Similar Events

-Review of station records'showed no previous similar et,nts.

Corrective Actions

.The station-has comp Mted or initiated the following corrective

. actions:~

- 1) The faulted breaker was replaced with a spare. The spare-breaker was verified to operate properly. The originalbreaker was-repaired.

2) A cample ot 4KV breakers will be inspected to verify thatthis type of control device contact failure is not genericin nature,

i 3) Maintenance procedures are being revised to periodicallyinspect 4KV breaker control device contacts and ensure- theyare properly aligned.

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(- asAC Perm 3esA M98 z*?

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LICENSEE EVENT REPORT (LER) ISg'4',%'N""f,'",M"',5;a"Sd/ .o f 7n'| ,*J".!"n'sc.'

TEXT CONTINUATION !?.%".'"lo %"M*"fTr5d?'anle'"^,'!# u"|"MNn8'. .,-"A!"t.*?, "JJt"a"s'Jfv"400icit#d?& 0??ci-OF MANAGEMENT AND OUDGET,W ASHINGToN, DC 20603.,

F ACILITY NAW4 (H DOCKET NUMBER (26 LER NUMetR (6) Pact (3)

T'A" eN NweIn

Braver Vabey Powcr Station Unit 2 0 |5 |0 |0 |0 | 4|1 | 2, 9|2 - 0|0|8 0|0 0 |3 |0F 0|3-rixTrn, . 4 ,wwcr.,,,,assmon

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Renortability

Review of station records showed that the breaker had last beenopened on 4/23/92. It is believed th:t at that time the closingsprings failed to charp , causing the breaxcr and its associatedquench spray pump to be inoperable.- This resulted in one trainof Quench Spray being inoperable longer than allowed by TechnicalSpecifications. Also, during this time, the station changedmodes (from Operational Mode 5, Cold Shutdown, to OperationalMode 1, Power Operations) with only one train of Quench Sprayoperable. Mode changes with an inoperable train of Quench Sprayin -prohibited by Technical Specification 3.0.4. This event istherefore being_ reported in accordance with 10CFR50.73.a.2.1.B asa condition or operation' prohibited by-Technical Specifications.

Erfety Analysis

There were no safety implications due to this event. The B trainof Quench Spray was fully operable throughout this event andcapable of de-pressurizing the Containment Building in the eventof an accident (reference: Unit 2 UFSAR Section 6.2.2.2.1,'' Quench Spray System").- Additionally, both trains of the-recirculation spray containment-de-pressurization system werealso cperable throughout this event and capable of supplying longterm,_ post-accident containment cooling and pressure control,

t; ).-:

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pW.C Fenn 3eSA 46 891

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