ML20090D864

Preliminary AO-50-219/74-54:on 741018,stack Gas Sample Pump Stopped Running.Cause Under Investigation.Sample Pump Restarted

ML20090D864
Person / Time
Site:	Oyster Creek
Issue date:	10/21/1974
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20090D872	List: ML20090D864 ML20090D873
References
AO-50-219-74-54, NUDOCS 8303030724
Download: ML20090D864 (4)

Text

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To: J.?tes P. O'Reilly Directorato of negul. tory Operations Region 1 631 Park Avenuo King of Prussia, Penne,rivania 19406 Fron: Jersey Central Power 6 Light Company Oyster Creek Nuclear Generating Station Docket #50-219 Forked River,IIcw Jersey 08731 i

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Subject:

Abnormal Occurrence Report No. 50-219/74/54 i

ne following is a prelininary report being subcitted in co pliance with the Technical Specifications, f

paragraph 6.6.2. i Prclininary Approval: l i

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J. T. Carroll, jdr. Date cc: !!r. A. Gintbusso 8303030724 741021 PDR ADOCK 05000219 5 PDR g$-J/f

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Inii al Written Report Date:

10 m /74

. Tira of Occurrence:

O 1510 OYSTER CREEK NUCLEf.R GE ?EI'ATI!:': STATION FORrfD RIVER, NE;f JEREUY 0S731 Abnnmal Occurrence Report No. 50-219/74/ 54 IDENTIFICATION Violation of the Technical Specifications, paragraph 3.6. A.3, OF OCCURRE?CE:

failure of the stack gas an=ple system to continuously conitor stack releases i;hile thc reactor was in an unisolated condition.

'Ihis event is considere.1 to be an abnor=al occurrence as do-fined in the Technical Specifications, paragraph 1.153l

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CONDITIO:G PRIOR x Steady Ctate Powcr Routine Shutdown TO OCCURRENCE: llot Str.ndby Operation CJid Skedwn Jer,d -thnges During

__ Refueling Shutdown , Routino Power Operation Routine Startup Other (Specify)

Operatica . ._

1he major plant paracetcrs prior to this event were as fo11cus:

Power: Core, 1904 Init ,

Electric, 642Tio i Flow: Recirc., 16.0 X 10 4gp:2 i Feed., 6.99 X 106 lb/h* i Stack Gas: 14,100 pCi/sec j i

DESCRIPTIO:t At approxicately 1510 on October 18, 1974, an equiptent opera-0F OCCURRE:.JE: .'

. tor noticed that the stack gas sanplo cu p si.ec:cd to be cching ,

i excessive noisc. Ito then telephoned the control room to rcport  ;

his observation. During this telephone conversation, the [

equip =cnt operator noticed that the st::ck gas sar.ple pu p stopped nmning. A stack gas sarple loi flow alcra was roccived in the cc.vt?c) mn enincHent yk.b :.h trippin7. of the sr::,p3r

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p. 7. The shift foreman then vr.t m tr.s location of th : sud p3 urple pump and ro. started t:u gurij: 3t9 71 scing the ther:42

, avrlosd reset switch in the CN positi=, %e total tox t d tiec that the str.ck cu serple p:rp vu. et running is cath:md to be approxitately one minuth l

APPMiEN-l* CESE Dcsiy*n IP red,ttc 0F OCa T C C : Fanufacture (Dnen:al Servi:e Cec 35thm Installation / ' Str. Qwiromnntc1 Construction Cryseent Fai.ure Operator Odce (Specify) na c.2use of this occurreren is win 2mstigatica, m3CE~I & A ruview of tJm stack gas rsdisth x 2;r recorder trc a OCE C P. S C O.

derved the levcis of both maite chanach to be rolstivfy constant (. t 500 and 400 cys) 150r w zz6*s.ing b Corc cn1 den the p=p trip. In a further eHert to determine if excmin s*a/.h nbnws night havo ow=cf. &nOng the nygtaJrate eno cinuto patied that the stack gas srmplo pump w2s rot eper-sting, recorder tracos of rdi2t?;:.n .4.naercring systers cr:=draxC.

with two gaseous streats iclersd d=mylr, the stack were re-vicved. A mica of the off ru rrSMim cr. iter rcerir traces showed tJutt at approx 1:stKy S xlzstes prior to this er:ct, tM brgels of both crite.: ct.urnis were TcIntiw*y constsnt (at npproximately 1.:t I d axi'i:) with no spiUrt- [

h 2.idit:Ica, a review of the r: Ice = StS iang ventilatica exhaust radf ation r.onitor recrk:r trers showed that at t';2 t!:e of e.is event, the levels cI brch .nandtor channcI: ven

.g g relatVIh c$ustant (at cypoxt:2colyg : c/hr).with no spil.ing. P.ved on these considerations and the very shen period.cf tize that tb3 stack gas Sx pI4: p2:p was not opntinin the safety sagdficence of this evet 3r censidered to be mini-Es1.

• CORTECTOT trC710N: The stack gas sample pump was restarts-l by placing the t.Wr41 crerload rosat switch in the m positice Following routut.

the pu=p was exanined by rainteremo penonnel, tio abnx=d-ties nre Identified in this e%c:'m,.

FAlum DJD 7b be supplied, if applic61a.

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i Frepsr M By: N ,'N (J'N\h, _ __

Ect-n 10/21/7.:

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