ML17332A699

NPDES Noncompliance Notification:On 950205 to 16,33 Wild Ducks Entrained in Intake Cribs & Subsequently Collected on Intake Screens within Screenhouse.Suspect Ducks Entrained While Feeding on Zebra Mussels

ML17332A699
Person / Time
Site:	Cook
Issue date:	03/23/1995
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:1208G, NUDOCS 9503280267
Download: ML17332A699 (4)

Text

PR.ICOR.IMV 1.(ACCELERATED RIDSPROCESSING

'REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9503280267 DOC.DATE:

95/03/23NOTARIZED:

NODOCKETFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATION PFITZPATRICK,E.

IndianaMichiganPowerCo.(formerly Indiana&MichiganEleRECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)R

SUBJECT:

NPDESnoncompliance notification:

on950205to16,33wildducksentrained inintakecribs&subsequently collected onintakescreenswithinscreenhouse.Suspect ducksentrained whilefeedingonzebramussels.0DISTRIBUTION CODE:COOIDCOPIESRECEIVED:LTR JENCL+SIZE:1ptNOTES:RECIPIENT IDCODE/NAME PD3-1PDRGN3DRSS/RPBEXTERNAL:

LITCOAKERS,DNRCPDRCOPIESLTTRENCLRECIPIENT IDCODE/NAME HICKMAN,J

~OGC/HDS2NOACCOPIESLTTRENCLD0UNNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEiVASTE!CONTACTTHE DOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2083)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSI'ORDOCUMENTS YOUDON"I'EED!

TOTALNUMBEROFCOPIESREQUIRED:

LTTR8ENCL IndianaMichiganPowerCompanyP.O.Box16631Columbus, OH43216March23,1995AEP'NRC'1208G DocketNos.:50-31550-316U.S.NuclearRegulatory Commission ATTN:DocumentControlDeskWashington, D.C.20555Gentlemen:

flDonaldC.CookNuclearPlantUnits1and2NOTIFICATION OFENTRAINMENT OFWILDDUCKSThisnotification isforwarded pursuanttoSection5.4.2,Appendix"B"oftheCookNuclearPlantTechnical Specifications.

Thirty-threewildduckswereentrained inthecirculating watersystemintakecribsandsubsequently collected ontheCookNuclearPlanttravelling screens.Theentrainment

'oftheducksdoesnotrepresent aviolation ofstateorlocalstatute.Attheirrequest,however,anotification summarizing theduckentrainment situation wasmadetotheMichiganDepartment ofNaturalResources.

Thefollowing summaryisprovidedforyourinformation.

FromFebruary5to16,1995,thirty-three wildduckswereentrained intheCookNuclearPlantintakecribsandsubsequently collected ontheintakescreenswithinthescreenhouse.

Thespeciesarebelievedtobeonecommonmerganser, andthirty-two lesserscaup.Preceding theFebruary5-16,period,webelievealargenumberofscaupwerewintering onlakesinthisarea,possiblyduetotheunusually mildweatherconditions whichexistedearlythisyear.DuringtheweeksofFebruary5andFebruary12,1995,harshwinterconditions causedavailable inlandlakestoquicklyfreezeover.Theseconditions causedtheduckstorelocatetotheareaofthePlant'sintake/discharge, whereopenwatersandafoodsupply(zebramusselsattachedtolimestone riprapandintakestructures) exist.Upto700duckshadbeenobservedraftingintheopendischarge waters.na~~n95032802b7 950323PDRADOCK050003158PDR

U.S.NuclearRegulatory Commission Page2AEP'NRC'1208G Theplantiscurrently operating inthede-icingmodewhereaportionoftheplant'sdischarge waterisroutedthroughoneofthethreeintaketunnels,effectively preventing frazzleicefromformingonthesubmerged intakecribs.Thisre-alignment causestheintakewatervelocityintheremaining twotunnelstoincrease.

Webelievethattheduckswereentrained whentheyfedonzebramusselsattachedtothesubmerged intakecribbarracks,andtheyeitherswaminsidetheracksorwereovercomebythepulloftheintakewaterintotheplant.PleasenotethattheintakecribswerecleanedofzebramusselsonSeptember 6,1994,atacostofapproximately

$58,240.Thiscleaninghasproveneffective inpreviousyearsinpreventing duckentrainment.

Whentheshoreicerecedesandallowssafeaccesstotheintakecribs,wewillconductaninspection divetodetermine ifanyre-infestation hasoccurredontheintakeracks.Theplantisnormallyoperatedinthede-icingmodeforplantsafetyreasonsuntilmid-March.

Fullcirculating waterpumpflowismaintained tomaximizeunitefficiency.

Theflowcouldbedecreased bytakingacirculating waterpumpofflineand/ortakingtheplantoutofthede-icingmode.Exitingthede-icemodecouldmakeadifference inactualvelocityattheintakeracks,however,thisisnotpossibleuntiltheicebuilduparoundtheplantdisappears.

Wewillswitchoffdeicemodeassoonasitisconsidered tobesafebyouroperating parameters.

Shouldyouhaveanyquestions orconcernsregarding thisnotification, pleasecontactDouglasMalin(614)223-2050orGordonArent(614)223-2048'incerely, E.E.Fitzpatrick VicePresident ehCC:A.A.BlindG.CharnoffJ.B.MartinNFEMSectionChiefNRCResidentInspector

-BridgmanJ.R.Padgett