ML20084D239

Preliminary AO 50-219/74/26:on 740412,emergency Svc Water Pump 52C Failed to Start.Cause Under Investigation

ML20084D239
Person / Time
Site:	Peach Bottom, Oyster Creek, 05000000
Issue date:	04/12/1974
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-50-219-74-26, NUDOCS 8304110016
Download: ML20084D239 (9)

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..,. :n y 631 .: Ark Avenue Ki .; af Prussia, Pennsylvania 19406 Jersr/ Central Power 6 Light Company Ofs r: Creek Nuclear Generating Station Docket #50-219 Foded River, New Jersey 08731 Abn:=lal Occurrence Report No. 50-219/74/ 2(,

The following is a preliminary report being submitted in cripliance with the Technical Specifications pan;raph 6.6.2.

Preliminaiy Approval:

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l Initial Telephone Date of Report Date: 4/12/74 Occurrence:. lll4/12/74 . .,

Initial Written Time of P.cport Date': 4/12/74 Occurrchce: 0855 OYSTER CREEK NUCLEAR GENEP TING STATION FORKED RIVER, NEW JERSEY 08731

. Abnormal Occurrence Report No. 50-219/74/ 26 IDENTIFICATION Violation of the Technical Specifications, paragraph N/A ,

OF OCCURRENCE:

Failure of emergency service water pump (52C) to start when called upon.

This event is considered to be an abnormal occurrence as de-fined in the Technical Specifications, paragraph 1.15D .

CONDITIONS PRIOR TO OCCURRENCE: X Steady State Power Routine Shutdown Hot Standby Operation ,

Cold Shutdown Load Changes During Refueling Shutdown Routine P.ower. Operation Routine Startup Other (Specify)

Oper tion l

l Power: Core, 1843 MNt i Elec., 637 MNe Flow: Recirc., 61 x 106 lb/hr l Feed., 6.9 x 106 lb/hr -

Stack Gas: 36,600 pCi/Sec l

DESCRIPTION On Friday, April 12, 1974, in attempting a normal start of the OF OCCURRENCE:

containment spray system, the following sequence of events occurred:

1) A start signal given to containment spray system II.

2) Containment spray pump 51C started.

3) Emergency service water pump 52C failed to start and -

" Emergency Service Water Pump C Failure" alarm initiated after the NISO.second time delay. .

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' Abnormal Occurrence Report No. 50-219/74/26 * -

Page 2

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4) Emergency service water pump 52D was then started and oper-ated successfully in accordance with requirements of Tech-nical Specification 3.4.C.4.

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5) Containment spray system II was secured.

6) An operator was dispatched to the 4160V switchgear room and

it was discovered that the thermal overload relay had tripped 4

on the 52C breaker. The overload relay was reset.

7) Control room operator attempted a restart of containment spray system II.

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8) The system operated properly with no irregularities.

9) The system, after this successful operability, was secured.

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The system was given an additional operability check -later in 4 .

the day and operated successfully with no problems or alarms.

Prior to this event on Thursday, April- 11, 1974, the containment spray system II was initiated to obtain torus water sample and to pump torus water. At this time, while running the system, the " Emergency Service Water Pump C Trouble" alarm was received.

The pump continued operating and an operator was dispatched to j the emergency service water pump to investigate. The oil IcVel and the bearing temperatures were normal. However, the operator did not check the thermal overload relay _at the pump breaker

. in the 4160V switchgear room. At this time, it was thought that the alarm was a faulty indication and a job order was issued to have it diecked out. 101en the system was secured,

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the alarm did not c1 ear. This. alarm was' still in when the pump

.. start was attempted at the time of-the incident.

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O O Abnormal Occurrence P.cport No. 50-219/74/26 -

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l APPARENT CAUSE Design Procedure OF OCCURRENCE: Fbnu facture. Unusual Service Condition

, Installation / Inc. Environmental Construction Component Failure Operator Other (Specify)

A check of the logic circuit showed that the initial alarm of

" Emergency Service Water Pump C Trouble" should not have pre-

, vented the pump from starting. The incident is still under investigation and the exact cause yet to be determined.

ANALYSIS OF The containment system is designed to provide heat removal t OCCURRENCE:

capability with one containment spray and one cuergency service j water pump in either loop. The safety significance of this event is in the loss of redundancy of the emergency service water pumps in one of the two redundant containment spray systems.

CORRECTIVE The corrective action will be determined by the Plant Operations ACTION:

Review Committee after the appropriate review of all the cir-cunstances associated with this event.

FAILURE DATA: Under investigation. t i

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l Prepared by: T . e es ,-s Date: 4/12/74 l V .

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. _, o James P. O'Reilly o

To:

Directorate of Regulatory-Operations Region I 631 Park Avenue King of Prussia, Pennsylvania ~1 9406 From: .

Jersey Central Power G Light Company Oyster Creek Nuclear Generating Station Docket #50-219 Forked River, New Jersey 08731

Subject:

Abnormal Occurrence Report No. 50-219/74/ 1 The following is a preliminary report being submitted -

in compliance with the Technical Specifications paragraph 6.6.2. ,

Preliminaiy Approval:

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08731 6F RKED RIVER, NEW JERSEY Abnomal Occurrence O -

Report No. 50-219/74/ 2 (o IDENTIFICATION Violation of the Technical Specifications, paragraph N/4 ,

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p 4 L u g,e o p E M Ec c e p c4 SE RVICE WATcP. Pu MP STA2.T w HV m CALLSO uPS 9 .

(67.c)To m This event is considered to be an abnomal occurrence as de-fined in the Technical Specifications, paragraph 1 1G D .

l CONDITTONS PRIOR TU OCCURRENCE: /_ Steady State Power Routino Shutdown Hot Standby ~ Operation

__ _ Cold Shutdown I,oad Changes During Refueling Shutdown -

Routine Pcwor Operation Routino Startup Other (Specify)

Operation _

Yowri.q toe.a - )984'3 Mwt Et.ec. - G 3'1 Mwe-Flow .

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FESSw. - 4 9 x it ' */ wl, STmc C, G A 5 - 36,6 o o A4ei/ste DESCRIPTION OP OCCURRENCE: ON F#.AbA3 APAiL lti t9'N iiu' A~ttaMpTipG A Wo&4AL SIMT o P T t4E CATAiuMBUT DAj k!YU4,'THE F#LLcwi9s $1EQg;eucs dP BJEUTs oc.c.vea.eo .

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• 0 i) eaucc,eucy hvice wsrse..bp 52.t EAeo T. NF guo" Emac. SE.avice WATag be t %itute"AtmM toibTeo ANT 9? +t 90 Sec.~Ture htAY.

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s) CmTuwucuT SDeAy SysTemT wAs SECOEeo. ,

s) Au OPERAToe wAs DisPaTc.deo 7b THe 4i6o v kirewa

, (loom Auo iT wAs Dscovceco ~The Taie THWL op by gpoTc.gpap ga THE 52. c. 2caAKc7.. T4 ovettono d MLA1 LvAs Reset-

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'Twe snTerw wa.s Givao A9 AcosTionat O e c e,e m tiTy c a te.g. v t w Twa bq ,suo ope %Teo' 3uccetsPutW W iT H 90 %d8 tem ott. ALAcA1,$,

hoc TO Ti\ls EveJT ou Thuet GA Apgit i t,1crM,THe Co S?e.ng 51 sTamE WAt suTTiaTeo To OSTasu TDcus wTet Sample Aoo Th Phg Toevs ianTee. AT Tthe Time w+1:4 e

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O APPARE!TT CAUSE Design Procedure OF.0CCURPINCE: Manufacture Unusual Service Condition Installation / Inc. Environmental Construction Corponent Failure Operator Other (Specify)

A CRER.C. o9 THE L 0GIC t\EcvF TM0ugO TI%TT+C iMEnAL ALAR OP 'EME2.CEWv( TEctllCe LuAThe 9vMp C. 30l//306 S40ulD.06T Mt/3 l poTeo THE 4Mp ibrm $TmTiuG The iutiDe97 i5 ST LL uuoeg, t kvESTtoETTov Awo s ME 'Exe.T. CAusE. YET Tb h DGTeE.4staeb.

ANALYSIS OF OCCURRENCE:

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seevica tsree bp iu e iTMee 'ooP T"e SWST1 S tud'F" " 8 gg EUaF 15 seu T tt e L e ff o f 600 eon 9c.1 S TMe OnWT 3E6/KB tv,iTaz,9wAPS 5W O92 0F M t. T*to k ovfucowY Cont S N i 34 CORRECTIVB -

AcrION:

T M B C c (t # 3 :Tiva At:.Tivn ws.R Ge DETeeMiuBO 3Y TMd-EL AFibt. THE' APPGdPI AT6 hviGW 09 ALL TRS-tttcuusTeces AssoctAT4' 0 wiTH TRn EVENT-

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PAILUPE DATA':

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, Pii1IAL7Ti!IA ELD 7aIC COMP /M Peach Dottoa Ato:ic Power Station'

. Delta, Pennsylvania

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April ll,17/4 Mr.. James P. O'Reilly, Di:xetor ' ,

United Statr a Ate nic Energy Co :aicsion- ' '

Directer .te of Ecirulatory Operatienn '

631 Park f.w.:ue i King of Pturcin, Fer.ncylnnia ,'19406 ,

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.%bject: ~~At'norml C~ currence 2.4-Hour !Totificatirm

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, i Confir::ing r.y convercaion with Mr. 2. A. Feil, t..E.C. Region I Regulatory Operationn Office on April 11, 1970 .; ,

Reference:

License iTunbcr DPR '.h Anendnent Husber 1- '

.j Technical. Spcificnica Reference 3-5.D.1 ,.,',  :,,i Report Fo.: 50-277-74-20 ,

April 1.1,17/4 Report D.n o: ,

April.20, 1974

. Occurrence Date: l . O" , .!

Facility: Pcach Dotton Atocic Power Stttien'. ,

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' Idedificatien of. Occurrdnce: i f,' '

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I hentary trip of DCIC In'icrter in the 7.c,crncncy: Shutdown Panel. '

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.Recctor van critical at about. N,pcVer.,' n, ./ 2..

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Deceription of Occurrence - "

During the canual trip of a reactor feedvater turbine, the ECIC inverter

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' . annunciated.in the control roomlocated The tripped. on the inverter. cuer6ency van iz:chutdown mediately control panel tripped. Utis con

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identificd and cuccconfully rccet. . . , ,

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' Derdgnation of Apparent Cause of Occurrence: '

4 Cause of TCPAZ inverter trippings is still under investigation.

Tripping appearn to be associated with possible voltage spikes on the -

j D.C. cyoten. , ,,,, 7, j

. I Analysis of Occurrence: / ' '

Since A.C. powr from the norettl RCIC inverter was never interrupted, the opernbility of the FCIC nycten van r.ot affected. Since the tripped j

, inverter could be renet 1:-_ediately, TCIC operability from the '

i enor6cacy chutdown panel was only out of cervice for a few ninutec.

" Corrective .*ction:

. The inverter irr.tallEdin the! emergency ahutt'ovn panel is being repinced with a rpre unit. Die unit which exparien:ed the trippind will bc hN o F . Vm3g3cny '

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