ML20090D832

Preliminary AO-50-219/75-02:on 750206,approx 4,000 Gallons of Condensate Inadvertently Released to Discharge Canal in Uncontrolled Manner.Cause Under Investigation.Backwash Discharge Valves Reclosed

ML20090D832
Person / Time
Site:	Oyster Creek
Issue date:	02/07/1975
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-50-219-75-02, AO-50-219-75-2, NUDOCS 8303020459
Download: ML20090D832 (5)

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' Janos P. O'! willy To:

Directorato of Regulatory Operations j

Region I 631 Park Avenue

King of Prucaia, Pennsylvania 19406 Trom

Jercey Central Power G Light Company Cycter Creek lluclear Generatin'g Station '

Docket #50-219 Forked River, New Jersey 08731 Subjects Abnomal Occurrence Report No. 50-219/75/02 The following is a preliminary report being submitted l l

t in compliance with the Technical specifications, paragraph 6.6.2.

Preliminary Approvals i .

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J. T. Carroll, Jr.

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cc: Mr. A. Giambueso

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PDR REGULAi'ony non. 33

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initial Tolephsne Dato of '

Report. Dato:

. n ,,.,,y v. 1975 Occ O enec Febrmry fr, 1975 v __

Initini Mritten */ ice of RcPort Dato: red m ry 7. 1975 Occurrenco: lar30

. , . OYSTER CREEK NUCLEAR GENERATING STATION -

FORKED RIVER, NE'# JERSSY 08731-3 .

..- l .t ., Abnormal Occurrence . <- * - -

- - Report No. 50-219/75/ 2 . ., r. t .

ID?.NTIFICATIOM Violation of the Technical Specifications, paragraphN/A ,

OF OCCURRENCE: -

Appror.imately four thousand g.dlonc of condensate was inadvert-antly released to the discharge canal in an uncontrolled manner.

• !his event is considered to be an abnormal occurrence as de-fined in the Technieni Specifications, paragraph 1.15C ".

CGUDITIONS PRIOR TO OCCU2RENCB: Steady Stato Power Exnztine Shutdown Hot Standby Operction

. Cold Shutdown I,oad Changes During Ibfueling Shutdown Routine Porer Operation Ecutine St::rtup r Other (Specify)

Operation ,

Reactor c: ode switch in rofue Reactor coolant temp e150 F

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DESCRIPTION 07 OCCU2RENCE: On February 5th at approximately 11:00 hours, the hotwell of "Y condonsor was flooded in order to nearch for tube Icaks in the

. North and South water boxes. As part of thin operation, it is r required to drain thd water boxes in preparation for personnel access. This is accomplished by " cracking" the backwanh dinchar valven (one per water box) and opening the water box vent valver

'Ita backwash discharge valves were not returned to the closed position prior to flooding the hotwells. Because of unogented tube leakage, the condonsato in tha hntwell 11 owed into the wato boxes and oirt the bukwash v.dvee. toe the discharge tunne at am

. estimated rete on 3GPM. This cortdi tion e . isted unil ape roximaG 09

30 on the foll.ceing day, at which time maintetance poe one.cl

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entered the north, side water box to armrch for '"5c Icaku. ThaY

' plugged soproxi.motely/ thirty thrbe laaking titben which redeced t rve . Leak.a ge ra te. to ap >roxiws s . J y one GPH. The obsol"vd leakstr*

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pr~n i-hto Ira. the South L .lo water box u.w very small (W did not contributo nignific.snt l I I to the roleur.e. The roleoce to the discharge tunnel continued at t.hin rat e until 14:30 hourn at which t.ime the s.19aitictuwe of t.he ove.nt w.tr. teall *.ed and the .

backwauh dincharye valven were clorird. ifater nanples were irmv.diately col.lected fror.) t.hu i n t.ako , ditachargo ntruct.stre, dicchtege canal y.r.tvr t.o dilution with Oynter Crock, and diocharge canal af t er allution wit h Cyater Creek at the Foute 9 Dridge. A sample of the conde mato ):ejsto discharged was t#cu. f rom t.hu condenuate StOTP.tJe talik the isoLOPic sWIDlyniD Of .Which in inC3uded in Titt J.chment. 3.

In addition, thern were two service wat.cr pumpn in ruirvice thr ourJhout the relcar.o.

each with a capacity of 6000 cPn providire; allut. ion flow. '

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O Abnormat occurrone -

, Report No. 50-219/75/2 Page El i

I.PPARENT CAUSE Design Procedure OF OCCURRENCE: _, Hanufacturo Unusual Sorvice Condit.

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

The enume of the_ pcecri is presently under invd ANALYSIS Ot*

OCCURRE!CE: It is not thought that the release limits to the environment given in

, Appendix 11, Tablo 11, Column 2, of 10 Crit 20 and Notes 1 through 5 there were exceeded as a resull. of this event. However, this conclusion is tentative pending final radiologlcal analysis of the samples taken.

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CORDECT.IVE ACTION: The Uackwater discharge valvoo were rccioned - further corrective acts is pending P.O.R.C. review of thic event PAILUIE tutA: N/A l

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. 1.T7?.Cf!?'J:NT I INelide Cor.contration -

! 2 131 9.3 X 10'O I

1133 2.7 X 10-6 1 Bal40 7.5 x 10-6 )

La I40 4.7 x 10-5 Ce 141 1.8 x 10-5 Xa 133 3.4 x 10'4 ,

Xe 135 4.0 x 10-5 51 -5 Cr 1.6 x 10

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HnO4 3.6 x 10 Co60 1.7 x 10-5

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