ML17326A193

Forwards 20 Revised & Eight New TS Nuregs,Nei TS Task Force (TSTF) Traveler Numbers TSTF-17,rev 2,TSTF-37,rev 2,TSTF-58, Rev 1,TSTF-59,rev 1,TSTF-107,rev 4,TSTF-169,rev 1,TSTF-197, Rev 2,TSTF-204,rev 1,TSTF-207,rev 3 & TSTF-230,rev 1

ML17326A193
Person / Time
Issue date:	06/23/1999
From:	DAVIS J W NUCLEAR ENERGY INSTITUTE (FORMERLY NUCLEAR MGMT &
To:	BECKNER W D NRC (Affiliation Not Assigned)
References
PROJECT-689, RTR-NUREG-1430, RTR-NUREG-1431, RTR-NUREG-1432, RTR-NUREG-1433, RTR-NUREG-1434 NUDOCS 9907120272
Download: ML17326A193 (65)

Text

NUCLEARENERGYINSTITUTE JamesW.DavisDIRECTOROPERATIONS DEPARTMENT, NUCLEARGENERATION June23,1999Dr.WilliamD.Beckner,BranchChiefTechnical Specifications BranchOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, DC20555-0001

SUBJECT:

Forwarding ofRevisedTSTFsandNewTSTFsPROJECTNUMBER:689

DearDr.Beckner:

Enclosedare20revisedandeightnewTechnical Specification NUREGsNEITechnical Specification TaskForce(TSTF)Travelers.

Thisletteralsotransmits nineeditorial changesandthestatusofallcurrently pendingTechnical Specification Bulletins (TSBs).Revisedtravelers areTSTF-17,Rev.2,TSTF-37,Rev.2,TSTF-58,Rev.1,TSTF-59,Rev1,TSTF-107, Rev.4,TSTF-169, Rev.1,TSTF-197, Rev.2,TSTF-204, Rev.1,TSTF-207, Rev.3,TSTF-230, Rev.1,TSTF-262, Rev.1,TSTF-263,Rev.2,TSTF-265, Rev.1,TSTF-266, Rev.1,TSTF-273, Rev.1,TSTF-280, Rev.1,TSTF-283, Rev.1,TSTF-284, Rev.2,TSTF-309,Rev.2andTSTF-316, Rev.1.Thesetravelers weremodifiedasaresultoffeedbackanddiscussions withNRCstaff.Thenewtravelers areTSTF-333, Rev.0,TSTF-334,,Rev.

0,TSTF-335, Rev.0,TSTF-336, Rev.0,TSTF-337, Rev.0,TSTF-338, Rev.0,TSTF-339, Rev.0andTSTF-340, Rev.0.Alsoincludedinthistransmittal areeditsBWROG-ED-4, GEOG-ED-48, GEOG-ED-49, GEOG-ED-50, GEOG-ED-51, NRC-ED-13, NRC-ED-14, WOG-ED-18 andWOG-ED-19.

17761STREET,NWSUITE400WASHINGTON.

OC20006.3708 PHONE202.739.8105 FAX202.785.1898 jwdnei.or9 Hnc1osure 3

r Mr.WilliamD.Beckner,BranchChiefJune23,1999Page2TSBstatusisasfollows:oTSB-2,Rev.0hasbeenincludedinTSTF-310.

TSB-3,Rev.0hasbeenprocessed asNRC-ED-4.

TSB-7,Rev.0hasbeenincorporated withrelatedmaterialinTSTF-338.

TSB-12,Rev.0isincorporated byTSTF-263.

TSB-15,Rev0hasbeenincorporated inTSTF-340.

TSB-16,Rev.0hasbeenrejectedbyWOG.Duetomultipledesigns,thisisnotagenericchange.Thisissueshouldbeaddressed asnecessary onaplantspecificbasis.TSB-17,Rev.0isstillunderevaluation.

WOGisproviding adraftresolution ofthepressurizer levelpositionforreviewbyBWOGandGEOG.Thesteamgenerator levelportionrequiresevaluation whichwilllikelyextendbeyondthedeadlineforinclusion intoRevision2oftheITSNUREGs.TSB-18,Rev.0isunderevaluation whichwilllikelyextendbeyondthedeadlineforinclusion intoRevision2oftheITSNUREGs.TSB-19,Rev.0issimilartoTSTF-164.

TheTSTFrecommends approvalofTSTF-164ratherthanprocessing TSB-19.oTSB-20,Rev.0isunderevaluation byWOG.TSB-21,Rev0concerning ReactorCoolantSystemSpecificActivi:yLCO3.4.16isstillunderevaluation bytheTSTF.Additional dialogueisrequiredbetweentheTSTFandNRC.TheTSTFalsowithdraws TSTFs-270 and288andtheyhavebeenaddressed inTSTF-284, Rev.2.Also,asexplained inourmeetingJune16,1999,theTSTFrequestsyoureconsider yourrejection ofTSTF-41.Anupdatedprioritylistisalsoenclosed.

Pleasecontactmeat(202)739-8105orVinceGilbertat(202)739-8138ifyouhaveanyquestions orneedtomeetwithindustryexpertsontheserecommended changes.Sincerely, hv'P~~JamesW.DavisEnclosures c:DeborahL.JohnsonStewartL.MagruderNRR-DRPMTechnical Specification TaskForce e

(WOG-139, Rev.0)Indust.y/TSTF StandardTechnical Specification ChangeTravelerClarifytheIceBasket20BasketWeightCriteriaClassification:

1)CorrectSpecifications NUREGsAffected:

[1430~14311432it1433Q1434TSTF-335Description:

Theproposedchangewillmovethecriteriaforselecting anadditional 20icebasketsforweighingifoneofthcrandomlyselectedbasketsweightfallsbelowtheTechnical Specification (TS)requiredminimum&omthebasestotheTS.Surveillance Requirement (SR).Thiscriterion wasincludedintheTSSRinPhaseIIoftheWOGMeritTS'sandwasmovedtothebasesinPhaseIILAdditionally, thewordingoftheSRwillberevisedtoeliminate anyconfusion overtheTSSRstatement that"each"icebasketcontainsgreaterthanorequalto[1400]lboficesinceitwillprovide,asapartoftheTSSR,thestepstotakeifoneormorebasketsareidentified weighinglessthantherequiredminimumandthattheweightrequirements areforthebeginning oftheoperating cycle.Finally,thesurveillance

&equencywillberevised&om9monthsto18monthswhichwillthenbeinaccordance withthemajorityofthcicecondenser plantssurveillance frequencies.

Justification:

Thebasicrequirement fortheiceweightintheicecondenser istoensureasufficient massoficeisavailable tocondensethesteamproducedbyaLOCAthusensuringthepeakcontainment pressureismaintained belowdesignlimitsfollowing adesignbasisaccident(DBA).Aspecified valueoficeforeachicebasketisrequiredtoprovideanevendistribution oficeintheicecondenser.

Thcrequirement toweighadditional baskets&omthesamebayinwhichoneormoreicebasketswereidentified asbeingbelowtheminimumspecified weightensuresthatnolocalzoneexiststhatisgrosslydeficient inice.Suchazonecouldexperience earlymeltoutduringaDBAtransient, creatingapathforsteamtopassthroughtheicecondenser withoutbeingcondensed.

Placingthestatement requiring thesamplingof20additional basketsinabayintheTSSRdoesnotresultinareduction intherequirements associated withtheice,condenser.

Instead,thiswillensureacommonunderstanding andimplementation ofthe'requirements whenar.icebasketisidentified asbeingunderweight.

Atpresent,theTSSRonlystatesthat"eachbasketcontain>[1400]lbofice."NoguidanceisprovidedintheTSastowhatactiontotakeforanunderweight basket.Thepresentwordingcouldallowtheincorrect interpretation thattheicccondenser isinoperable whenasingleunderweight basketisidentified.

Placingthcpreviously described statement backintotheTSandrevisingtheremainder oftheSRtoclarifythewordingwouldensureaclearunderstanding oftheactionsnecessary foridentified underweight baskets.Theclarification thattheweightrequirement isapplicable tothebeginning ofthecycledoesnotchangethepresentintentoftheTSbutensuresthereisnoconfusion thattheweightdocumented intheSRistheweightrequiredatthebeginning ofthecyclesincetheweightattheendoftheoperating cyclemaybelessthanthisduetosublimation.

Thisdoesnotresultinachangetotheintentorimplementation oftheTSsinceasublimation allowance wasprovidedintheSRweightrequirement.

Theincreasetoan18month&cquencydoesnotresultinanoverallreduction intheend-of-cycle iccweightaslongaseitheraplantspecificanalysisshowsasufficient marginoficeintheicccondenser toaccountforsublimation ortherequiredminimumiceweightasspecified intheSRisadjustedupwardtoaccountfortheincreased sublimation time.Eitherofthesemethodswillallowforsublimation overthclongerSurveillance intervalwithoutadecrcascbelowtheminimumrequirediceweightattheendoftheoperating cycle.IndustryContact:Buschbaum, DennyNRCContact:Giardina, BobRevisionHistory(254)897-5851301-314-3152 dbuschbltuelectric.corn Ibb1nrc.govOGRevision0RevisionStatus:ActiveNextAction:NRCRevisionProposedby:SequoyahTravelerRev.2.Copyright (C)1998,ExcelServicesCorporation.

UsebyExcelServicesassociates, utilityclients,andtheU.S.NuclearRegulatory Commission isgranted.Allotheruscwithoutwrittenpermission isprohibited.

etl5199 (WOO-139, Rev.0)TSTF-33'G Revision0RevisionStatus:ActiveNextAction:NRCRevisionDescription:

OriginalIssueOwnersGroupReviewInformation DateOriginated byOG:1I-Jun-99OwnersGroupComments(NoComments)

OwnersGroupResolution:

ApprovedDate:11-Jun-99 TSTFReviewInformation TSTFReceivedDate:11-Jun-99 DateDistributed forReview11-Jun-99 OGReviewCornpleted:

~BWOG~WOG~CEOGatr,BWROGTSTFComments:

(NoComments)

TSTFResolution:

ApprovedDate:15-Jun-99 NRCReviewInformation NRCReceivedDate:16-Jun-99 NRCComments:

(NoComments)

FinalResolution:

NRCActionpendingFinalResolution Date:Incorporation IntotheNUREGsFiletoBBS/LANDate:NUREGRevincorporated:

AffectedTechnical Specifications TSTFinformedDate:SR3.6.15.2IceBed(IceCondenser)

TSTFApprovedDate:SR3.6.15.2BasusIceBed(iceCondenser)

SR3.6.15.3IceBed(IceCondenser)

SR3.6.15.3BasesIceBed(Ice,Condenser)

TravelerRcv.2.Copyright (C)l998,ExcelServicesCorporation.

UscbyExce!Services associates, utilitydients,andtheU.S.hluclearRegulatory Commission isgranted.Allotherusewithoutwrittenpermission isprohibited.

6/IS/99 0

73!r-33<Attachment 1Technical Specification 3.6.15NoSignificant HazardsConsideration NOSIGNIFICANT HAZARDSCONSIDERATION DETERMINATION

[Utili,ty Name]hasconcluded thatoperation of[PlantName]Unit[I],inaccordance withtheproposedchangetothetechnical specifications foroperating license(s)],

doesnotinvolveasignificant hazardsconsideration.

[UtilityName]'sconclusion isbasedonitsevaluation, inaccordance with10CFR50.91(a)(1),

ofthethreestandards setforthin10CFR50.92(c).

A.Theroosedamendment doesnotinvolveasiificantincreaseintherobabilit orconseencesofanaccidentreviouslevaluated.

TheproposedTSamendments discussed belowcannotincreasetheprobability ofoccurrence ofanyanalyzedaccidentbecausetheyarenottheresultorcauseofanyphysicalmodification totheicecondenser structures, andforthecurrentdesignoftheicecondenser, thereisnocorrelation betweenanycrediblefailureandtheinitiation ofanypreviously analyzedaccident.

Regarding theconsequences ofanalyzedaccidents, theproposedamendment providesfortheactionsrequiredifoneozmoreicecondenser icebasketsaredetermined toweighbelowtheminimumspecified valuetobemadeapartoftheTSsurveillance requirement (SR)insteadofbeinglocatedinthebases.Thisensuresconsistent interpretation oftherequirements oftheTS.Theclarification oftheresponserequiredifoneormoreicebasketsinagivenbayisdetermined tobeunderweight ensuressufficient iceismaintained ineachbaytopreventearlymeltoutinalocalzonefollowing aDBAandthattherequiredoveralliceweightismaintained intheicecondenser.

Additionally, theclarification thattheweighi.requirement isapplicable tothebeginning ofthecycledoesnotchangethepresentintentoztheTSbutensuresthereisnoconfusion, sincetheweightattheendoftheoperating cyclemaybelessthanthatspecified intheSRduetosublimation.

Thisdoesnotresu'tinachange"otheintentorimplementation oftheTSsinceasublimation allowance wasprovidedintheoriginalSRweightrequirement.

Theseclarifications donotresultinanyaffectonplantequipment,'r operation andtheactionstakenauringtheimplementation oftherevisedTSwillbethesameaspriortotherevision.

Therefore, theclarification oftheserequirements willnotincreasetheconsequences ofanyaccidentpreviously evaluated.

Theproposedamendment alsorevisestheSurveillance frequency fromevery9monthstoevery18monthssuchthatitwillcoincidewithrefueling outages.Theoriginaliceweightrequirements fortheicecondenser surveillance includedaconservative allowance foricelossthroughsublimation toensurethedesignweightlowerlimitwasnotexceededduringtheSurveillance interval.

Verification thatsufficient iceismaintained intheicecondenser isperformed atthebeginning ofeachoperating cycletoensurethedesignminimumweightlimitisnotexceededattheendoftheinterval.

Therefore, increasing theSurveillance frequency doesnotaffecttheicecondenser operation oraccidentresponsesincesufficient iceismaintained toaddressthelimitingdesignbasisaccident(s)

(DBAs)andtheproposedamendment willnotincreasetheconsequences ofanyaccidentpreviously evaluated.

Theroosedamendment doesnotcreatetheossibilit ofanewordifferent kindofaccidentfromanaccidentreviouslevaluated.

Theinclusion oftheactionrequiredforanunderweight icebasketintheTSSR,insteadofinthebasesoftheTS,providesfortheconsistent interpretation oftherequirement.

Theclarification oftheresponserequiredifoneormoreicebasketsinagivenbayisdetermined tobeunderweight ensuressufficient iceismaintained ineachbaytopreventearlymeltoutinalocalzonefollowing,a DBAandthattherequiredoveralliceweightismaintained intheicecondenser.

Additionally, theclarification thattheweightrequirement isapplicable tothebeginning ofthecycledoesnotchangethepresentintentoftheTSbutensuresthereisnoconfusion, sincetheweightattheendoftheoperating cyclemaybelessthanthatspecified intheSRduetosublimation.

Thisdoesnotresultinachangetotheintentorimplementation oftheTSsinceasublimation allowance wasprovidedintheoriginalSRweightrequirement.

Theoperation andmaintenance oftheicecondenser anditsassociated equipment willnotchangeasaresultoftheseclarifications.

Therefore, theimplementation oftheseclarifications willnotcreate,thepossibility ofaccidents orequipment malfunctions ofanewordifferent kindfromanypreviously evaluated.

Theproposedamendment alsorevisestheSurveillance 75+F-3)xfrequency fromevery9monthstoevery18monthssuchthatitwillcoincidewithrefueling outages.Theoriginaliceweightrequirements fortheicecondenser Surveillance includedaconservative allowance foricelossthroughsublimation toensurethedesignminimumweightlimitwasnotexceededduring'theSurveillance interval.

Theproposedamendment ensuresanadequateamountoficeismaintained intheicecondenser byeitheranincreaseintherequirediceweighttoaddresstheincreased sublimation timeorbyaplantspecificanalysisjustifying theallowedweight,thusensuringthedesignweightlowerlimitisnotexceededattheendoftheinterval.

Theicecondenser servestolimitthepeakpressureinsidecontainment following aLossofCoolingAccident(LOCA)andsufficient icewouldbeavailable atalltimestokeepthepeakcontainment pressurebelowthedesignlimit.Therefore, increasing theSurveillance frequency willnotaffecttheicecondenser operation oraccidentresponsesincesufficient iceismaintained toaddressthelimitingDBAsandtheproposedamendment willnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.

Theroosedamendment doesnotinvolveasiificant.reduction inamarinofsafetTheproposedamendment allowsfortheconsistent interpretation oftherequitedactionsifanicebasketisdetermined toweighlessthantherequiredminimum.Theinclusion oftheseactj.onsintheTSSRinsteadofintheTSbasesassuresthecorrectactionswillbetakenasintendedbytheTSs.Theclarification ofthe.responserequiredifoneormoreicebasketsinagivenbayisdetermined tobeunderweight ensuressufficient iceismaintained ineachbaytopreventearlymeltoutinalocalzonefollowing aDBAandthattherequiredoveralliceweightismaintained intheicecondenser.

Additionally, theclarification thattheweightrequirement isapplicable tothebeginning ofthecycledoesnotchangethepresentintentoftheTSbutensuresthereisnoconfusion, sincetheweightattheendoftheoperat'ing cyclemaybelessthanthatspecified intheSRduetosublimation.

Thisdoesnotresultinachangetotheintentorimplementation oftheTSsinceasublimation allowance wasprovidedintheoriginalSRweightrequirement.

Theproposedclarifications donotresultinorhaveanyaffectontheoperation ormaintenance ofanyplantequipments Y

/Thusthedesignlimitsforthecontinued safe'function ofthecontainment structure following aDBAarenotexceededduetothischangeandtherefore theproposedamendment doesnotinvolveareduction inamarginofsafety.Theicecondenser systemisprovidedtoabsorbthermalenergyreleasesfollowingaLOCAandtolimitthepeakpressureinsidecontainment.

Thecontainment analysisshowsthattheproposedamendment torevisetheSurveillance frequency fromevery9monthstoevery18monthswillnotresultinanincreasetothepeakcontainment pressurefollowing aLOCAsincetheminimumiceweightlimithasalsobeenadequately addressed ensuringthatsufficient iceisavailable attheendoftheSurveillance interval.

Therefore, increasing theSurveillance frequency willnotaffecttheicecondenser operation oraccidentresponsesincesufficient iceismaintained toaddressthelimitingDBAsandthedesignlimitsforthecontinued safefunctionofthecontainment structure following aDBAarenotaffected.

Forthesereasons,theproposedamendment doesnotinvolveareduction inamarginofsafety.V.ENVIRONMENTAL IMPACTCONSIDERATION Theproposedchangedoesnotinvolveasignificant hazardsconsideration, asignificant changeinthetypesoforsignificant increaseintheamountsofanyeffluents thatmaybereleasedoffsite,orasignificant increaseinindividual orcumulative occupational radiation exposure.

Therefore, theproposedchangemeetstheeligibility criteriaforcategorical exclusion setforthin10CFR51.22(c)(9)

~Therefore, pursuantto10CFR51.22(b),

anenvironmental assessment oftheproposedchangeisnotrequired.

InsertAl678.-3)sIceBedgceCondenser) 3.6.15SURILLANCEREUIREMENTS continued SURVEILLANCE FREQUENCY SR3.6.15.2Verifytotalweightofstoredice>=[2,721,600) lbby:4nof181DELETEa.Weighingarepresentative sampleof>=14'tsaneriibasketco]lbofice;atthebeginning ofeachoperating cycleb.Calculating totalweightofstoredice,ata95%confidence level,usingallicebasketweightsdetermined inSR'3.6.15.2.a.

SR3.6.15.3Verifyazimuthal distribution oficeata95%confidence levelbysubdividing weights,asdetermined bySR3.6.15.2.a, intothefollowing groups:f181a.Group1-bays1through8;b.Group2-bays9through16;andc.Group3-bays17through24.Theaverageiceweightofthesamplebasketsineachgroup&omradialrows1,2,4,6,8,and9shallbe>=[1400)lb.SR3.6.15.4Verify,byvisualinspection, accumulation oficeorfrostonstructural memberscomprising flowchannelsthroughtheicecondenser is(=[0.38)inchthick.9months(continued)

WOGSTS3.6-54Rev1,04/07/95 0

IBASES~~<i-335IceBed(IceCondenser)

B3.6.15SURVEILLANCE SR3.6.15.1(continued)

REQUIREMENTS temperature condition.

ThisSRmaybesatisfied byuseoftheIceBedTemperature Monitoring System.SR3.6.15.2InsertBTheweighingprogramisdesignedtoobtainarepresentative sampleoftheicebaskets.Therepresentative sampleshallinclude6baskets&omeachofthe24icecondenser baysandshallconsistofonebasket&omradialrows1,2,4,6,8,and9.Ifnobasket&omadesignated rowcanbeobtainedforweighing, abasket&omthesamerowofanadjacentbayshallewDeleteTherowschosenincludetherowsnearesttheinsideandoutsidewallsoftheicecondenser (rows1and2,andSand9,respectively),

wherehettransferintotheicecondenser ismostlikelytoinfluence sublimation.

Verifying thetotalweightoficeensuresthatthereisadequateicetoabsorbtherequiredamountofenergytomitigatetheDBAs.[nsertConeormorebasketsIfabasketisfoundtocontain([1400]lbofesentative sampleof20additional basketseashallbeweihed.Theaveraggeweih'ese21baskets(thediscrepant basketandthe20additional baskets)shallbe>=[1400]lbata95%confidence level.Weighing20additional barnebaymtheeventaSurveillance revealstetontains([1400]lbensuresthatnoocalzoneexiststhatisgrosslydeficient inice,Suchazonecouldexperience earlymeltoutduringaDBAtransient, creatingapathfor'teamtopass uhtheicebedwithout eincdened.eFrequency osmonthswasbasedonicestoragetestsandtheallowance builtintotherequiredicemassoverandabovethemassassumedisafetyanalyses.

inexperience hasverifiedthat,withthemonthFrequency, theweightrequireemaintained withnosignificant degradation betweensurveillances lDSeitDWOGB3.6-156continued Rev1,04/0//95

BASESM7/--)3$IceBedgceCondenser)

B3.6.15SURVEILLANCE SR3.6.15.3PSQUIREMENTS (Continued)

ThisSRensuresthattheazimuthal distribution oficeisreasonably uniform,byverifying thattheaverageiceweightineachofthreethaiousoficecondenser basiswithinthelimit.TheFreuencomonthswasbasedonicestoragetestsandtheallowance builtintorequiredicemassoverandabovethemassassumanalyses.

Operating experience hasverifiedthat,withthmonthFrequency, theweightrequirements aremaintained withnosignificant degradation betweensurveillances.

f181SR3.6.15.4ThisSRensuresthatthefiowchannelsthroughtheicecondenser havenotaccumulated anexcessive amountoficeor&ostblockage.

Thevisualinspection mustbemadefortwoormoreflowchannelspericecondenser bayandmustincludethefollowing specificlocatioiis alongthefiowchannel:a.Pastthelowerinletplenumsupportstructures andturningvanes;b.Betweenicebaskets;c.Pastlattice&ames;d.Throughtheintermediate floorgrating;ande.'hroughthetopdeckfloorgrating.Theallowable

[0.38]inchthickbuildupoffrostoriceisbasedontheanalysisofcontainment responsetoaDBAwithpartialblockageoftheicecondenser flowpassages.

Ifaflowchannelinagivenbayisfoundtohaveanaccumulation of&ostorice>[0.38]inchthick,arepreseritative sampleof20additional flowchannels&omthesamebaymustbevisuallyinspected.

Iftheseadditional flowchannelsareallfoundtobeacceptable, thediscrepant flowchannelmaybeconsidered single,unique,andacceptable deficiency.

Morethanonediscrepant flowchannelinabayisnotacceptable, however.Theserequirements arebasedonthesensitivity ofthepartialblockageanalysistoadditional blockage.

TheWOGB3.6-157continued Rev1,04/07/95

(/('3wInsertANOTE-Ifoneormorebasketsinanicecondenser bayarefoundtocontain<[1400]lbsofice,arepresentative sampleofatleast20additional baskets&omthesamebayshallbeweighed.Theaverageweightoficeinthebasketsweighedinthespecified bayshallbe>[1400]Ibsata[95]%confidence level.InsertBTheselection criteriaandmethodology fortheweighingof144icecondenser basketswasdocumented intwoSERsissuedforthelicensing oftheD.C.CookNuclearFacility.

ThefirstSER,issuedasSupplement 5oftheoriginalD.C.CookSERonJanuary16,1976(LetterN76007),addressed theweighingof96icebasketsanddefinedthestatistical methodsforanalyzing thedata.ThesecondSERwasissuedasletterN77016onFebruary16,1977andaddressed thereasonsforincreasing thesamplesizeto144icebaskets.InsertCThetotaliceweightdefinedinthisSRistheminimumrequirediceweightforthebeginning ofanoperating cycle.Asublimation allowance hasbeenprovidedtoensuresufficient iceisavailable attheendoftheoperating cyclefortheicecondenser toperformitsintendeddesignfunction.

ThisSRhasbeenmodifiedbyanotethatindicates ifoneormorebasketsarefoundtocontain<[1400]lbofice,arepresentative sampleofatleast20additional basketsfromthesamebayshallbeweighedandthattheaverageweightoficeinthebasketsweighedinthespecified bay(thediscrepant basket(s),

theremaining originally selectedbaskets,andthe20additional baskets)shallbe2[1400]lbata[95]%confidence level.InsertDTheaverageweightfigureof[1400]lbsoficeperbasketcontainseitheraconservative allowance foricelossthroughsublimation whichhasbeendetermined byplantspecificanalysisoradefined[15]%allowance.

Theminimumweightfigug'eof[2,721,600]

lbsoficealsocontainsanadditional fl]%conservative allowance toaccountforsystematic errorinweighinginstruments.

Intheeventthatobservedsublimation ratesareequaltoorlowerthandesignpredictions.

afterthreeyearsofoperation, theminimumicebasketweightsmaybeadjustedd0wilwai'd.

Attachment 3NKKG1432,Revision1Technical Specification 3.6.15RevisedPages SURVEILLANCE REUIREMENTS continued IceBedgceCondenser) 3.6.15SURVEILLANCE FREQUENCY SR3.6.15.2NOTEIfoneormorebasketsinanicecondenser bayarefoundtocontain([1400]lbsofice,arepresentative sampleof20additional baskets&omthesamebayshallbeweighed.Theaverageweightoficeinthebasketsweighedinthespecified bayshallbe~[1400]lbsata[95]%confidence level.Verifytotalweightofstorediceatthebeginning ofeachoperating cycleis>=[2,721,600]

lbby:[18]monthsa.Weighingarepresentative sampleof>=144icebasketsandb.Calculating totalweightofstoredice,ata95%confidence level,usingallicebasketweightsdetermined inSR3.6.15.2.a.

SR3.6.15.3Verifyazimuthal distribution oficeata95%confidence levelbysubdividing weights,asdetermined bySR3.6.15.2.a, intothefollowing groups;[18]months~~a.Group1-bays1through8;b.Group2-bays9through16;andc.Group3-bays17through24.Theaverageiceweightofthesamplebasketsineachgroup&omradialrows1,2,4,6,8,and9shallbe>=[1400]lb.WOGSTS3.6-54Rev1,04/07/95 IceBedgceCondenser) 3.6.15SURVEILLANCE REUIREMENTS continued SURVEILLANCE FREQUENCY SR3.6.15.4Verify,byvisualinspection, accumulation oficeor&ostonstructural memberscomprising Qowchannelsthroughtheicecondenser is<=[0.38]inchthick.9monthsSR3.6.15.5Verifybychemicalanalysesofatleastninerepresentative samplesofstoredice:a.Boronconcentration is>=[1800]ppm;and18monthsb.pHis>=[9.0]and<=[9.5].SR3.6.15.6Visuallyinspect,fordetrimental structural wear,cracks,corrosion, orotherdamage,twoicebasketsfromeachazimuthal groupofbays.SeeSR3.6.15.3.

I40months AES7$(F-2)~IceBed(iceCondenser)

B3.6.15SURVEILLANCE REQUIREMENTS SR3.6.15.1(continued) temperature condition.

ThisSRmaybesatisfied byuseoftheIceBedTemperature Monitoring System.SR3.6.15.2Theweighingprogramisdesignedtoobtainarepresentative sampleoftheicebaskets.Therepresentative sampleshallinclude6baskets&omeachofthe24icecondenser bays'ndshallconsistofonebasket&omradialrows1,2,4,6,8,and9.Ifno%asket&omadesignated rowcanbeobtainedforweighing, abasket&omthesamerowofanadjacentbayshallbeweighed.Theselection criteriaandmethodology fortheweighingof144icecondenser basketswasdocumented intwoSERsissuedforthelicensing oftheD.C.CookNuclearFacility.

ThefirstSER,issuedasSupplement 5oftheoriginalD.C.CookSERonJanuary16,1976(LetterN76007),addressed theweighingof96icebasketsanddefinedthestatistical methodsforanalyzing thedata.ThesecondSERwasissuedasletterN77016onFebruary16,1977andaddressed thereasonsforincreasing thesamplesizeto144icebaskets.Therowschosenincludetherowsnearesttheinsideandoutsidewallsoftheicecondenser (rows.land2,and8and9,respectively),

whereheattransferintotheicecondenser ismostlikelytoinfluence sublimation.

Verifying thetotalweightoficeensuresthatthereisadequateicetoabsorbtherequiredamountofenergytomitigatetheDBAs,ThetotaliceweightdefinedinthisSRistheminimumrequirediceweightforthebeginning ofanoperating cycle.Asublimation allowance hasbeenprovidedtoensuresufficient iceisavailable attheendoftheoperating cyclefoitheicecondenser toperformitsintendeddesignfunction.

ThisSRhasbeenmodifiedbyanotethatindicates ifoneormorebasketsarefoundtocontain<[1400]lbofice,arepresentative sampleof20additional basketsfromthesamebayshallbeweighedandthattheaverageweightoficeinthebasketsweighedinthespecified bay(thediscrepant basket(s),

theremaining originally selectedbaskets,andthe20additional baskets)shallbe2[1400]lbata[95]%confidence level.Weighing20additional baskets&omthesamebayintheeventaSurveillance revealsthatoneormorebasketscontains<[1400]lbensuresthat'nolocalzoneexiststhatisgrosslydeficient inice.Suchazonecouldexperience earlymeltoutduringaDBAtransient, creatingapathforsteamtopassthroughtheicebedwithoutbeingcondensed.

TheFrequency of18monthswasbasedonicestoragetestsandtheallowance builtintotherequiredicemassoverandabovethemassassumedinthesafetyanalyses.

Theaverageweightfigureof[1400]lbsoficeperbasketcontainseitheraconservative allowance foricelossthroughsublimation whichhasbeendetermined byplantspecificanalysisoradefined[15]loallowance whichisafactorof[15]higherthanassumedfortheicecondenser design.

/~r/=-32S-Theminimumweightfigureof';2,721,600]

lbsoficealsocontainsanadditional

[1]%conservative allowance toaccountforsystematic errorinweighinginstruments.

Inthe'ventthatobservedsublimation ratesareequaltoorlowerthandesignpredictions afterthreeyearsofoperation, theminimumicebasketweightsmaybeadjusteddownward.

Operating experience hasverifiedthat,withthe18monthFrequency, theweightrequirements aremaintained withnosignificant degradation betweensurveillances WOGB3.6-156continued Rev1,04/07/95.

ASES/zan'--'35IceBedgceCondenser)

B3.6.15SURVEILLANCE SR3.6.15.3REQUIREMENTS (Continued)

ThisSRensuresthattheazimuthal distribution oficeisreasonably uniform,byverifying thattheaverageiceweightineachofthreeazimuthal groupsoficecondenser baysiswithinthelimit.TheFrequency of18monthswasbasedonicestoragetestsandtheallowance builtintotherequiredicemassoverandabovethemassassumedinthesafetyanalyses.

Operating experience hasverifiedthat,withthe18monthFrequency, theweightrequirements aremaintained withnosignificant degradation betweensurveillances.

SR3.6.15.4TliisSRensuresthattheflowchannelsthroughtheicecondenser havenotaccumulated anexcessive amountoficeorfrostblockage.

Thevisualinspection mustbemadefortwoormoreflowchannelspericecondenser bayandmustincludethefollowing specificlocations alongtheflowchannel:Pastthelowerinletplenumsupportstructures andturningvanes;b.Betweeriicebaskets;c.Pastlattice&ames;d.Throughtheintermediate floorgrating;ande.Throughthetopdeckfloorgrating.Theallowable f0.38]inchthickbuildupoffrostoriceisbasedontheanalysisofcontainment responsetoaDBAwithpartialblockageoftheicecondenser flowpassages.

Ifaflowchannelinagivenbayisfoundtohaveanaccumulation offrostorice)[0.38]inchthick,arepresentative sampleof20additional flowchannelsfromthesamebaymustbevisuallyinspected.

Iftheseadditional flowchannelsareallfoundtobeacceptable, thediscrepant flowchannelmaybeconsidered single,unique,andacceptable deficiency.

Morethanonediscrepant flowchannelinabayisnotacceptable, however.Theserequirements arebasedonthesensitivity ofthepartialblockageanalysistoadditional blockage.

TheWOGB3.6-157continued Rev1,04/07/95 Attachment 4NUREG1432,Technical Specification 3.6.15Information OnlyPages

ThisPageisForInformation OnlyandisNotPartoftheProposedTSTF3.6CONTAINMENT SYSTEMS3.6.15IceBedgceCondenser)

P(rc"33mIceBedgceCondenser)

B3.6.15LCO3.6.15TheicebedshallbeOPERABLE.

APPLICABILITY:

MODES1,2,3,and4.ACTIONSCONDITION REQUIREDACTIONCOMPLETION TIMEA.Icebedinoperable.

B.RequiredActionand~associated Completion Timenotmet.A.1RestoreicebedtoOPERABLEstatus.B.1BeinMODE3.48hours6hoursB.2BeinMODE5.36hoursSURVEILLANCE REUIREMENTS SURVEILLANCE SR3.6.15.1Verifymaximumicebedtemperature is(=[27]oF.FREQUENCY 12hours(continued)

WOGSTS3.6-53Rev1,04/07/95 (WOG-140, Rev.0)Industry/TSTF StandardTechnical Specification ChangeTravelerIcebedflowchannelblockagesurveillance requirement Classification:

3)ImproveSpecifications NUREGsAffected:

t1430~14311432!14331t1434TSTF-336Description:

TheproposedchangewouldrevisetheIceBedTechnical Specifications (TS)andassociated TSBasesinsurveillance requLrement (SR)3.6.15.4.

Theproposedchangereplacesthecurrentvisualinspection requirement thatusesa0.38inchice/frost buildupcriteria.

Theproposedchangeisavisualsurveillance programthatprovidesatleast95percentconfidence levelthatflowblockagedoesnotexceedthe15percentblockageofthetotalflowareaassumedintheaccidentanalyses.

Whereas,the0.38inchprogramrequiredinspection ofasfewastwofiowchannelspericecondenser bay,thenewprogramwillrequireatleast54(33percent)ofthe162flowchannelsperbaytobeinspected.

TheproposedchangerevisesSR3.6.15.4&equencyinterval&om9monthsto18monthsforfiowpassageinspection oftheicecondenser.

Thesurveillance isintendedtobeperformed following outagemaintenance asanasleftsurveillance.

Thischangealsoproposestorevisetheapplicability

&om"flowchannelsthroughtheicecondenser" to"fiowchannelsthroughtheicebed".'AproposedrevisiontotheTSBasesclarifies whichstructures aretobinspected.

Therevisionlimitsthestructures tobeinspected toonlyinclude"betweenicebaskets"and"pastlaniceframesandwallpanels".TheTSBasesrevisionalsoisexpandedtoexplainwhyotherstructures withintheicecondenser arenotinspected pertheSR.Theproposaldeletestheword"frost"&omtheSR.TheWestinghouse basesforfrostandiceasitappliestotheSRhavebeenaddedtotheTSBasestoexplainwhy&ostisnotanimpediment toair/steam flowthroughtheicecondenser.

Justification:

RecentindustryeventspromptedtheWOGIceCondenser Mini-Group (ICMG)toreviewicecondenser technical specifications toidentifyenhancements thatwouldprovidedirectcorrelation todesignbasesaccident(DBA)analyses.

DBAanalysesdemonstrate thatdesignlimitsforpressurization oflowercontainment subcomparunents andthesteelcontainment vesselwillnotbeexceededwith15percentblockageoftheicebedflowchannels.

ReviewofSR3.6.15.4determined thatthe0.38inchice/&ostbuildupcriteriadoesnotadequately provideforthefullintentofthesurveillance.

Throughdiscussions withWestinghouse, theICMGhasdetermined thatthereisnodirectcorrelation betweentheexistingstandardTS0.38inchcriteriaforice/frost accumulation onflowareastructural membersandthepercentage ofoverallfiowblockageassumedintheplantanalyses.

However,theproposedchangeprovidesanacceptance criteriaof15percentblockage, whichisdirectlyrelatedtothisfunctional requirement.

Frost,asrecognized byWestinghouse, isnotanimpediment tosteamandairflow.TheWestinghouse definitions for&ostandicehavebeenaddedtotheBasesofSR3.6.15.4, andfrostspecifically excludedasflowchannelblockagetoprecludepotential declarations ofinoperability duetofrostratherthanice.IceCondenser operability isassuredbynumerousmeansduringoperations.

Theicebedtemperature ismonitored atleastonceeverytwelvehourstoensuretemperatures arelessthanorequalto27F.Thisisaccomplished inaconservative mannerbyreviewing numerouspointsthroughout theicecondenser toensureallpointsarelessthanorequalto27F.Inadditiontothesurveillance requirements, therearealarmsinthecontrolroomthatwillindicatetotheoperatorifanyofthepointsbeingrecordedreach27F.Also,weeklyoperatortoursrequiretheoperators towalkdownthere&igeration systemtoevaluateitsabilitytofunction.

Thisincludeswalkingdownthechillers, airhandlingunits,andglycolpumpstoensurethattheyareinproperworkingorder.Thetoursalsorequiretheoperators toinspecttheintermediate deckdoorstoensuretheyarenotfrozenshut.Thishelpstoensurethatnoabnormaldegradation oftheicecondenser isoccurring duetocondensation orfrozendrainlinesinlocalized areas.IceCondenser operability isdemonstrated bytheperformance ofvariousprocedures.

procedures verifytheicebedi>>nTravelerRev.2.Copyright (C)199g,ExcelServicesCorporation.

UsebyExcelServicesassociates, utilityclients.andtheU.S.NuclearRegulatory Commission isgranted.Allotherusewithoutwrittenpermission isprohibited.

6/15/99 r~~,

~~(WOG-140, Rev.0)TSTF-336goodphysicalcondition.

Procedures alsovalidateassumptions usedintheaccidentanalysis.

Theflowpassageinspection isperformed toensuretheabsenceofabnormalicebeddegradation aswouldbeindicated ifaccumulations exceedtheSRacceptance criteriaTherequesttoincreasethesurveillance interval&omninemonthstoeighteenmonthswouldrequiretheperformance ofsuchicebedmonitoring duringrefueling outages.ICMGmembersbelievethatindustryimprovements inicebedinspection results,duetomodifiedmaintenance techniques thathavebeenimplemented, provideadequateassurance thattheicecondenser canmeetandevenexceeditsdesignfunctionwithoutperforming thesurveillance onaninemonth&equency.

ExamplesofOperating Experience andIndustryconcerted improvements:

>Improvedcontrolofdoorsduringmaintenance including appropriate penetiations forhosestominimizeicecondenser heatandhumiditygains.>Improved management ofwallandfioorde&ostcycles(ifused,occursonlyduringoutages).

>Improved preventative maintenance programsonIceCondenser coolingsystems.>Increased priorityonrepairofIceCondenser coolingsystems.>Improvedtrainingandprocedures foremptyingandrefilling ofbaskets,andsubsequent cleanup.>Improvedtrainingandprocedures forflowpassagesurveillances.

>Proposedincreaseinminimumsamplesizerequirement forflowpassagesurveillance.

>Proposedsurveillance acceptance criterion thateffectively alignswithDBAanalysisforoperability determination.

Improvedcontrolofmaintenance haslimitedthoseactivities withthepotential forsignificant fiowchannelblockagetoduringrefueling outages.Verifying anicebedisleftwithlessthanorequalto15%flowchannelblockageattheconclusion ofarefueling outageassurestheicebedwillremaininanacceptable condition forthedurationoftheoperating cycle.Duringtheoperating cycle,anexpectedamountoficesublimates andreformsas&ostonthecoldersurfacesintheIceCondenser.

However,frostdoesnotdegradeflowchannelflowarea.Therefore, flowchannelblockagesurveillance shouldonlyberequiredattheconclusion ofscheduled refueling outages.Thesurveillance will'ffectively demonstrate operability foranallowed18monthsurveillance period.IndustryContact:Buschbaum, DennyNRCContact:Giardina, Bob(254)897-5851301-314-3152dbuschb1tuelectric.corn lbb1nrc.govRevisionHistoryOGRevision0RevisionStatus:ActiveNextAction:NRCRevisionProposedby:McGuireRevisionDescription:

OriginalIssueOwnersGroupReviewInformation DateOriginated byOG:1!-Jun-99 OwnersGroupComments(NoComments)

OwnersGroupResolution:

ApprovedDate:11-Jun-99 TSTFReviewInformation TSTFr'eceived Date:11-Jun-99 DateDistributed forReview11-Jun-99 OGReviewCompleted:

~BWOGPWOGPCEOGstrBWROGTravelerRev.2.Copyright (C)l99g,ExcelServicesCorporation.

UsebyExcelServicesassociates, utilityclients,andtheU.S.NuclearRegulatory Commission isgranted.Allotherusewithoutwrittenpcnnission isprohibited.

6/I5/99

~~

~~(WOG-140, Rev.0)TSTF-336OGRevision0RevisionStatus:ActiveNextAction:NRCTSTFComments:

(NoComments)

TSTFResolution:

ApprovedDate:15-Jun-99 NRCReviewInformation NRCReceivedDate:16-Jun-99 NRCComments:

(NoComments)

FinalResolution:

NRCActionPendingFinalResolution Date:Incorporation IntotheNUREGsFiletoBBS/LANDate:TSTFInformedDate:NUREGRevIncorporated:

AffectedTechnical Specifications TSTFApprovedDate:SR3.6.15.4IceBed(IceCondenser)

SR3.6.15.4BasesIceBed(IceCondenser)

Bkgnd3.6.15BaseslceBed(iceCondenser) 6/l5/99TravelerRev.2.Copyright (C)l998.ExcelServicesCorporation.

UsebyExcelServicesassociates, utilityclients,andtheU.S.NuclearRegulatory Commission isgranted.Allotherusewithoutwrinenpermission isprohibited.

~~

(5pF-334Attachment 1Technical Specification 3.6.15NoSignificant HazardsConsideration NOSIGNIFICANT HAZARDSCONSIDERATION DETERMINATION

[UtilityName]hasconcluded thatoperation of[PlantName]Unit[X],inaccordance withtheproposedchangetothetechnical specifications

[oroperating license(s)],

doesnotinvolveasignificant hazardsconsideration.

[UtilityName]'sconclusion isbasedonitsevaluation, inaccordance with10CFR50.91(a)(1),

ofthethreestandards setforthin10CFR50.92(c).A.Theroosedamendment doesnotinvolvea'siificantincreaseintherobabil'it orconseencesofanaccidentreviouslevaluated.

NeithertheTSamendment northeTSBaseschangecanincreasetheprobability ofoccurrence ofanyanalyzedaccidentbecausetheyarenottheresultorcauseofanyphysicalmodification toicecondenser structures.

Forthecurrentdesignoftheicecondenser, thereisnocorrelation betweenanycrediblefailureofitandtheinitiation ofanypreviously analyzedevent.Regarding theconsequences ofanalyzedaccidents, theicecondenser isanengineered safetyfeaturedesigned, inpart,tolimitthecontainment sub-compartment andsteelcontainment vesselpressures immediately following theinitiation ofaLOCAorHELB.Conservative sub-compartment pressureanalysisshowsthiscriteriawillbemetifthereduction intheflowareaperbayprovidedforicecondenser air/steam flowchannelsislessthanorequalto15percent,orifthetotalflowareablockedwithineachlumpedanalysissectionislessthanorequaltothe15percentassumedinthesafetyanalysis.

Thepresent0.38inchfrost/ice buildupsurveillance criteria.onlyaddresses theacceptability ofanygivenflow.channel, andhasnodirectcorrelation betweenflowchannelsexceeding thiscriteriaandpercentoftotalflowchannelblockage.

Infact,itwasnevertheintentofthecurrentSRtomakesuchacorrelation.

Ifproblemswereencountered inmeetingthe0.38inchcriteria, itwasexpectedthatadditional inspection and-analysis, suchasprovidedintheproposedamendment, wouldbeperformed tomakesuchadetermination.

Thus,theproposedamendment forflowblockagedetermination providesthenecessary assurance thatflowchannelrequirements aremetwithoutadditional evaluations, andthuswillnotincreasetheconsequences ofaLOCAorHELB.Theproposedamendment alsorevisesthesurveillance frequency fromevery9monthstoevery18monthssuchthatitwillcoincidewithrefueling outages.Theelimination ofthemid-cycle surveillance doesnotsignificantly increasethecons'equence ofanaccidentpreviously evaluated.

Improv'ed controlofmaintenance haslimitedthoseactivities withthepotential forsignificant flowchannelblockagetoduringrefueling outages.Verifying anicebedisleftwithlessthanorequalto15%flowchannelblockageattheconclusion ofarefueling outageassurestheicebedwillremaininanacceptable condition forthedurationoftheoperating cycle.Duringtheoperating cycle,acertainamountoficesublimates andreformsasfrostonthecoldersurfacesintheIceCondenser.

However,frostdoesnotdegradeflowchannelflowarea.Thesurveillance willeffectively demonstrate operability foranallowed18monthsurveillance period.Therefore, increasing thesurveillance frequency doesnotaffecttheIceCondenser operation oraccidentresponse.

Limitingicebedflowchannelblockagetolessthanorequalto150ensuresoperation isconsistent withtheassumptions ofthedesignbasisaccident(DBA)analyses.

Therefore, theproposedamendment willnotincreasetheconsequences ofanyaccidentpreviously evaluated.

Theroosedamendment doesnotcreatetheossibilit ofanewordifferent

'kindofaccidentfromanaccidentreviouslevaluated.

Forsuchapossibility toexist,therewouldhavetobeeitheraphysicalchangetotheicecondenser, orsomechangeinhowitisoperatedorphysically maintained.

NoneoftheaboveistruefortheproposedTSamendment andTSBaseschange.Thereisnochangetotheexistingdesignrequirements orinputs/results ofanyaccidentanalysiscalculations.

Theroosedamendment doesnotinvolveasiificantreduction inamarinofsafetDesignBasisAccidentanalyseshaveshownthatwith85percentofthetotalflowareaavailable (uniformly distributed),

theicecondenser willperformitsintendedfunction.

Thus,thesafetylimitforicecondenser operability isamaximum15percentblockageofflowchannels.

SR3.6.15.4currently usesaspecificvalueof0.38inchbuilduptodetermine ifunacceptable frost/ice blockageexistsintheicecondenser.

However,thisspecificvaluedoesnothaveadirectcorrelation tothesafetylimitforblockageoficecondenser flowarea.TheproposedTSamendment requiresmoreextensive visualinspection (33percentoftheflowarea/bay) thaniscurrently described (2flowchannels/bay) intheTSBasesforSR3.6.15.4, thusproviding greaterreliability anda s~

MISC-g)<directrelationship totheanalytical safetylimits.ChangingtheTStoimplement asurveillance programthatismorereli'able andusesacceptance criteriaoflessthanorequalto15percentflowblockage, asallowedbytheTMDanalysis, willnotreducethemarginofsafetyofanyTS.Theproposedamendment alsorevisesthesurveillance frequency fromevery9monthstoevery18monthssuchthatitwillcoincidewithrefueling outages.Verifying anicebedisleftwithlessthanorequalto15%flowchannelblockageattheconclusion ofarefueling outageassurestheicebedwillremaininanacceptable condition forthedurationoftheoperating cycle.Duringtheoperating cycle,acertainamountoficesublimates andreformsasfrostonthecoldersurfacesintheIceCondenser.

However,frosthasbeendetermined tonotdegradeflowchannelflowarea.Thus,designlimitsforthecontinued safefunctionofcontainment sub-compartment wallsandthesteelcontainment vesselarenotexceededduetothischange.ENVZRONMENTAL ZMPACTCONSZDERATZON Theproposedchangedoesnotinvolveasignificant hazardsconsideration, asignificant changeinthetypesoforsignificant increaseintheamountsofanyeffluents thatmaybereleasedoffsite,orasignificant increaseinindividual orcumulative occupational radiation exposure.

Therefore, theproposedchangemeetstheeligibility criteriaforcategorical exclusion setforthin10CFR51.22(c)(9).Therefore, pursuantto10CFR51.22(b),

anenvironmental assessment oftheproposedchangeisnotrequired.

Attachment 2NIUI&G1431,Revision1Technical Specification3.6.15MarkedUpPages S

ig7F-336IceBedgceCondenser) 3.6.15SURVEILLANCE REUIREMENTS continued SURVEILLANCE

'FREQUENCY SR3.6.15.2Verifytotalweightofstorediceis~[2,721,600]

lbby:9monthsWeighingarepresentative sampleof~144icebasketsandverifying eachbasketcontains~[1400)Ibofice;andb.Calculating totalweightofstoredice,ata95%confidence level,usingallicebasketweightsdetermined inSR3.6.15.2.a.

R3.6.15.3Verifyazimuthal distribution oficeata95%confidence levelbysubdividing weights,asdetermined bySR3.6.15.2.a, intothefollowing groups:9monthsLGroup1-bays1through8;b.Group2-bays9through16;andc.Group3-bays17through24.Theaverageiceweightot'nesamplebasketsineachgroupfromradialrows1,2,4,6,8,and9shallbe~[1400]lb.SR3.6.15.4Verisualinspection, accumulation oficonstructural memberscornrisinannsti:ruhtheiceXones18edis(15percentblockageofhetotalfloware~,WOGSTS3.6-54 InsertATheicebasketscontaintheicewithintheicecondenser.

Theicebedisconsidered toconsistofthetotalvolumefromthebottomelevation oftheicebasketstothetopelevation oftheicebaskets.Theicebasketspositiontheicewithintheicebedinanarrangement topromoteheattransferfromsteamtoice.InsertBThisSRensuresthattheflowchannelsthroughtheicebedhavenotaccumulated iceblockagethatexceeds15percentofthetotalflowareathroughtheicebedregion.Theallowable 15percentbuildupoficeisbasedontheanalysisofthesu~mpartment responsetoadesignbasisLOCAwithpartialblockageoftheicecondenser flowchannels, Theanalysisdidnotperformdetailedflowareamodeling, butlumpedtheicecondenser baysintosixsectionsrangingfrom2.75baysto6.5bays.Individual baysareacceptable withgreaterthan15percentblockage, aslongas15percentblockageisnotexceededforanyanalysissection.Toprovidea95percentconfidence thatflowblockagedoesnotexceedtheallowed15percent,thevisualinspection mustbemadeforatfeast54(33percent)ofthe162flowchannelspericecondenser bay.Thevisualinspection oftheicebedflowchannelsistoinspecttheflowarea,bylookingdownfromthetopoftheicebed,andwhereviewisachievable upfromthebottomoftheicebed.Flowchannelstobeinspected aredetermined byrandomsample.Asthemostrestrictive icebedfiowpassageisfoundatalatticeframeelevation, the15percentblockagecriteriaonlyappliesto"fiowchannels" thatcomprisethearea:a.betweenicebaskets,andb.pastlatticeframesandwallpanels.Duetoasignificantly largerflowareaintheregionsoftheupperdeckgratingandthelowerinletplenumsupportstructures andturningvanes,agrossbuildupoficeonthesestructures wouldberequiredtodegradeairandsteamflow.Therefore, thesestructures areexcludedaspartofaflowchannelforapplication ofthe15percentblockagecriteria.

Industryexperience hasshownthatremovaloficefromtheexcludedstructures duringtherefueling outageissufficient toensuretheyremainoperablethroughout theoperating cycle.Removalofanygross'icebuildupontheexcludedstructures isperformed following outagemaintenance activities.

Operating experience hasdemonstrated thattheicebedistheregionthatisthemostflowrestrictive, duetothenormalpresenceoficeaccumulation onlatticeframesandwallpanels.Theflowareathroughtheicebasketsupportplatformisnotamorerestrictive flowareabecauseitiseasilyaccessible fromthelowerplenumandismaintained clearoficeaccumulation.

Thereisnomechanistically crediblemethodforicetoaccumulate ontheicebasketsupportplatformduringplantoperation.

Plantandindustryexperience hasshownthattheverticalflowareathroughtheicebasketsupportplatformremainsclearoficeaccumulation thatcouldproduceblockage.

Normallyonlyaglazemaydeveloporexistontheicebasketsupportplatformwhichisnotsignificant toblockageofflowarea.Additionally, outagemaintenance practices providemeasurestocleartheicebasketsupportplatformfollowing maintenance activities ofanyaccumulation oficethatcouldblockflowareas.Frostbuilduporlooseiceisnottobeconsidered asflowchannelblockage, whereasattachediceisconsidered blockageofaflowchannel.Frostisthesolidformofwaterthatislooselyadherent, andcanbebrushedoffwiththeopenhand.

IceBed(IceCondenser)

B3.6.15B3.6CONTAINMENT SYSTEMSB3.6.15IceBed(lceCondenser)

ADD1944BASESBACKGROUND Theicebedconsistsofove,721,60 Iboficestoredinbasketswithintheicecondenser.

Itsprimarypurposeistoprovidealargeheatsinkintheevent-ofareleaseofenergyfromaDesignBasisAccident(DBA)incontainment.

Theicewouldabsorbenergyandlimitcontainment peakpressureandtemperature duringtheaccidenttransient.

Limitingthepressureandtemperature reducesthereleaseoffissionproductradioactivity fromcontainment totheenvironment intheeventofaDBA.Theicecondenser isanannularcompartment encfosing approximately 300ooftheperimeter oftheuppercontainment compartment, butpenetrating theoperating decksothataportionextendsintothelowercontainment compartment.

Thelowerportionhasaseriesofhingeddoorsexposedtotheatmosphere ofthelowercontainment compartment, which,fornormalunitoperation, aredesignedtoremainclosed.Atthetopoftheicecondenser isanothersetofdoorsexposedtotheatmosphere oftheuppercompartment, whichalsoremainclosedduringnormalunitoperation.

Intermediate deckdoors,locatedbelowthetopdeckdoors,formthefloorofaplenumattheupperpartoftheicecondenser.

Thesedoorsalsoremainclosedduringnormalunitoperation.

Theupperplenumareaisusedtofacilitate surveillance andmaintenance oftheicebed.nsertAThisarrangement enancestheicecondenser's primaryfunctionofcondensing steamandabsorbing heatenergyreleasedtothecontainment duringaDBA.IntheeventofaDBA,theicecondenser inletdoors(locatedbelowtheoperating deck)openduetothepressureriseinthelowercompartment.

Thisallowsairandsteamtofiowfromthelowercompartment intotheicecondenser.

Theresulting pressureincreasewithintheicecondenser causestheintermediate deckdoorsandthetopdeckdoorstoopen,whichallowstheairtoflowoutoftheicecondenser intotheuppercompartment.

Steamcondensation withintheicecondenser limitsthepressureandtemperature buildupin(continued)

WOGSTSB3.6-151 S0 IceBed(IceCondenser)

B3.6.15BASESSURVEILLANCE SR3.6.15.3REQUIREMENTS(continued)

ThisSRensuresthattheazimuthal distribution oficeisreasonably uniform,byverifying thattheaverageiceweightineachofthreeazimuthal groupsoficecondenser baysiswithinthelimit.TheFrequency of9monthswasbasedonicestoragetestsandtheallowance builtintotherequiredicemassoverandabovethemassassumedinthesafetyanalyses.

Operating experience hasverNedthat,withthe9monthFrequency, theweightrequirements aremaintained withnosignificant degradation betweensurveillances.

SR3.6.15.4nsertBcontinued)

OGSTSB3.6-157 I

IceBed(IceCondenser)

B3.6.15BASESSURVEILLANCE REQUIREMENTS SR3.6.15.4(continued)

SR3.6.15.5Verifying thechemicalcomposition ofthestorediceensuresthatthestoredicehasaboronconcentration ofatleast[1800]ppmassodiumtetraborate andahighpH,p[9.0]andg[9.5],inordertomeettherequirement forboratedwaterwhenthemeltediceisusedintheECCSrecirculation modeofoperation.

Sodiumtetraborate hasbeenproveneffective inmaintaining theboroncontentforlongstorageperiods,anditalsoenhancestheabilityofthesolutiontoremoveandretainfissionproductiodine.ThehighpHisrequiredtoenhancetheeffectiveness oftheiceandthemeltediceinremovingiodinefromthecontainment atmosphere.

ThispHrangealsominimizes theoccurrence ofchlorideandcausticstresscorrosion onmechanical systemsandcomponents exposedtoECCSandContainment SpraySystemfluidsintherecirculation modeofoperation.

TheFrequency of[18]monthswasdeveloped considering thesefactsa.Longicestoragetestshavedetermined thatthechemicalcomposition ofthestorediceisextremely stable.b.Operating experience hasdemonstrated thatmeetingtheboronconcentration andpHrequirements hasneverbeenaproblem;andc.Someonewouldhavetoenterthecontainment totakethesample,and,iftheunitisatpower,thatpersonwouldreceivearadiation dose.SR3.6.15.6ThisSRensuresthatarepresentative samplingoficebaskets,whicharerelatively thinwalled,perforated cylinders, havenotbeendegradedbywear,cracks,corrosion, orotherdamage.Eachicebasketmustberaisedatleast12feetforthisinspection.

TheFrequency of(continued)

WOGSTSB3.6-158

~ViAttachment 3NIUI&G1431,Revision1Technical Specification 3.6.15RevisedPages

IceBedgceCondenser) 3.6.15SURVEILLANCE REUIRElvKNTS continued SURVEILLANCE FREQUENCY

'R3.6.15.2Verifytotalweightofstorediceis~[2,721,600]

Ibby:9monthsaoWeighingarepresentative sampleof~144icebasketsandverifying eachbasketcontains>[1400]lbofice;aildb.Calculating totalweightofstoredice,ata95%confidence level,usingallicebasketweightsdetermined inSR3.6.15.2.a.

R3.6.15.3Verifyazimuthal distribution oficeata95%confidence levelbysubdividing weights,asdetermined bySR3.6.15.2.a, intothefollowing groups:'monthsa.Group1-bays1through8;b.Group2-bays9through16;andc.Group3-bays17through24.Theaverageiceweightofthesamplebasketsineachgroupfromradialrows1,2,4,6,8,and9shallbep[1400]lb.SR3.6.15.4Verify,byvisualinspection, accumulation oficeonstructural memberscomprising flowchannelsthroughtheicebedisz15percentblockageofthetotalflowarea.18monthsWOGSTS3.6-54(continued)

C'I CPcs-)34IceBed(iceCondenser)

B3.6.15'3.6CONTAINMENT SYSTEMSB3.6.15lceBed(IceCondenser)

BASESBACKGROUND UTheicebedconsistsofover[2,721,600]

Iboficestoredin1944basketswithintheicecondenser.

ItsprimarypurposeistoprovidealargeheatsinkintheeventofareleaseofenergyfromaDesignBasisAccident(DBA)incontainment.

Theicewouldabsorbenergyandlimitcontainment peakpressureandtemperature duringtheaccidenttransient.

Limitingthepressureandtemperature reducesthereleaseoffissionproductradioactivity fromcontainment totheenvironment intheeventofaDBA.Theicecondenser isanannularcompartment enclosing approximately 300ooftheperimeter oftheuppercontainment compartment, butpenetrating theoperating decksothataportionextendsintothelowercontainment compartment.

Thelowerportionhasaseriesofhingeddoorsexposedtotheatmosphere ofthelowercontainment compartment, which,fornormalunitoperation, aredesignedtoremainclosed.Atthetopoftheicecondenser isanothersetofdoorsexposedtotheatmosphere oftheuppercompartment, whichalsoremainclosedduringnormalunitoperation..

Intermediate deckdoors,locatedbelow.thetopdeckdoors,formthefioorofaplenumattheupperpartoftheicecondenser.

Thesedoorsalsoremainclosedduringnormalunitoperation.

Theupperplenumareaisusedtofacilitate surveillance andmaintenance oftheicebed.lTheicebasketscontaintheicewithintheicecondenser.

Theicebedisconsidered toconsistofthetotalvolumefromthebottomelevation eftheicebasketstothetopelevation oftheicebaskets.Theicebasketspositiontheicewithintheicebedinanarrangement topromoteheattrains'.rfromsteamtoice.Thisarrangement enhancestheicecondenser's primaryfunctionofcondensing steamandabsorbing heatenergyreleasedtothecontainment duringaDBA.IntheeventofaDBA,theicecondenser inletdoors(locatedbelowtheoperating deck)openduetothepressureriseinthelowercompartment.

Thisallowsairandsteamtoflowfromthelowercompartment intotheicecondenser.

Theresulting pressureincreasewithintheicecondenser causestheintermediate deckdoorsandthetopdeckdoorstoopen,whichallowstheairtoflowoutoftheicecondenser intotheuppercompartment.

Steamcondensation withintheicecondenser limitsthepressureandtemperature buildupin(continued)

WOGSTSB3.6-151 CA7 IceBed(IceCondenser)

B3.6.15BASESSURVEILLANCE REQUIREMENTS SR3.6.15.4(continued) throughout theoperating cycle.Removalofanygrossicebuildupontheexcludedstructures isperformed following outagemaintenance activities.

Operating experience hasdemonstrated thattheicebedistheregionthatisthemostflowrestrictive, duetothenormalpresenceoficeaccumulation onlatticeframesandwallpanels.Theflowareathroughtheicebasketsupportplatformisnotamorerestrictive flowareabecauseitiseasilyaccessible fromthelowerplenumandismaintained clearoficeaccumulation.

Thereisnomechanistically crediblemethodforicetoaccumulate ontheicebasketsupportplatformduringplantoperation.

Plantandindustryexperience hasshownthattheverticalflowareathroughtheicebasketsupportplatformremainsclearoficeaccumulation thatcouldproduceblockage.

Normallyonlyaglazemaydeveloporexistontheicebasketsupportplatformwhichisnotsignificant toblockageofflowarea.Additionally, outagemaintenance practices providemeasurestocleartheicebasketsupportplatformfollowing maintenance activities ofanyaccumulation oficethatcouldblockflowareas.Frostbuilduporlooseiceisnottobeconsidered asflowchannelblockage, whereasattachediceisconsidered blockageofaflowchannel.Frostisthesolidformofwaterthatislooselyadherent, andcanbebrushedoffwiththeopenhand.SR3.6.15.5Verifying thechemicalcomposition ofthestorediceensuresthatthestoredicehasaboronconcentration ofatleast[1800]ppmassodiumtetraborate andahighpH,p[9.0]andg[9.5],inordertomeettherequirement forboratedwaterwhenthemeltediceisusedintheECCSrecirculation modeofoperation.

Sodiumtetraborate hasbeenproveneffective inmaintaining theboroncontentforlongstorageperiods,anditalsoenhancestheabilityofthesolutiontoremoveandretainfissionproductiodine.ThehighpHisrequiredtoenhancetheeffectiveness oftheiceandthemeltediceinremovingiodinefromthecontainment atmosphere.

ThispHrangealsominimizes theoccurrence ofchlorideandcausticstresscorrosion onmechanical systemsandcomponents exposedtoECCSandContainment (continued)

WOGSTSB3.6-158 Page1of2Tennessee ValleyAuthority SEQUOYAHNUCLEARPLANTWATTSBARNUCLEARPLANTCC:Mr.J.A.ScaliceChiefNuclearOfficerandExecutive VicePresident Tennessee ValleyAuthority 6ALookoutPlace1101MarketStreetChattanooga, Tennessee 37402-2801 Mr.KarlW.Singer,SeniorVicePresident NuclearOperations Tennessee ValleyAuthority 6ALookoutPlace1101MarketStreetChattanooga, TN37402-2801 Mr.JackA.Bailey,VicePresident Engineering

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~~Page2of2LTennessee ValleyAuthority

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&Conservation DivisionofRadiological Health3rdFloor,LandCAnnex401ChurchStreetNashville, TN37243-1532 McGuireNuclearStationCC:Ms.LisaF.VaughnLegalDepartment (PBO5E)DukeEnergyCorporation 422SouthChurchStreetCharlotte, NorthCarolina28201-1006 CountyManagerofMecktenburg County720EastFourthStreetCharlotte, NorthCarolina28202MichaelT.CashRegulatory Compliance ManagerDukeEnergyCorporation McGuireNuclearSite12700HagersFerryRoadHuntersville, NorthCarolina28078J.MichaelMcGarry,III,EsquireWinstonandStrawn1400LStreet,NW.Washington, DC20005SeniorResidentInspector c/oU.S.NuclearRegulatory Commission 12700HagersFerryRoadHuntersville, NorthCarolina28078Dr.JohnM.BarryMecklenberg CountyDepartment ofEnvironmental Protection 700N.TryonStreetCharlotte, NorthCarolina28202Mr.StevenP.ShaverSeniorSalesEngineerWestinghouse ElectricCompany5929CarnegieBlvd.Suite500Charlotte, NorthCarolina28209Ms.KarenE.LongAssistant AttorneyGeneralNorthCarolinaDepartment ofJusticeP.O.Box629Raleigh,NorthCarolina27602L.A.KellerManager-NuclearRegulatory Licensing DukeEnergyCorporation 526SouthChurchStreetCharlotte, NorthCarolina28201-1006 ElaineWathen,LeadREPPlannerDivisionofEmergency Management 116WestJonesStreetRaleigh,NorthCarolina27603-1335 Mr.RichardM.Fry,DirectorDivisionofRadiation Protection NorthCarolinaDepartment ofEnvironment, HealthandNaturalResources 3825BarrettDriveRaleigh,NorthCarolina27609-7721 Mr.T.RichardPuryearOwnersGroup(NCEMC)DukeEnergyCorporation 4800ConcordRoadYork',SouthCarolina29745Mr.H.B.BarronVicePresident, McGuireSiteDukeEnergyCorporation 12700HagersFerryRoadHuntersville, NC28078-8985 IC CatawbaNuclearStationCC:Mr.GaryGilbertRegulatory Compliance ManagerDukeEnergyCorporation 4800ConcordRoadYork,SouthCarolina29745Ms.LisaF.VaughnLegalDepartment (PB05E)DukeEnergyCorporation 422SouthChurchStreetCharlotte, NorthCarolina28201-1006 AnneCottington, EsquireWinstonandStrawn1400LStreet,NWWashington, DC20005NorthCarolinaMunicipal PowerAgencyNumber11427Meadowwood Boulevard P.O.Box29513Raleigh,NorthCarolina27626CountyManagerofYorkCountyYorkCountyCourthouse York,SouthCarolina29745PiedmontMunicipal PowerAgency121VillageDriveGreer,SouthCarolina29651Ms.KarenE.LongAssistant AttorneyGeneralNorthCarolinaDepartment ofJusticeP.O.Box629Raleigh,NorthCarolina27602ElaineWathen,LeadREPPlannerDivisionofEmergency Management 116WestJonesStreetRaleigh,NorthCarolina27603-1335 NorthCarolinaElectricMembershi'p Corporation P.O.Box27306Raleigh,NorthCarolina27611SeniorResidentInspector U.S.NuclearRegulatory Commission 4830ConcordRoadYork,SouthCarolina29745VirgilR.Autry,DirectorDivisionofRadioactive WasteManagement BureauofLandandWasteManagement Department ofHealthandEnvironmental Control2600BullStreetColumbia, SouthCarolina29201-1708 L.A.KellerManager-NuclearRegulatory Licensing DukeEnergyCorporation 526SouthChurchStreetCharlotte, NorthCarolina28201-1006 SaludaRiverElectricP.O.Box929Laurens,SouthCarolina29360Mr.StevenP.ShaverSeniorSalesEngineerWestinghouse ElectricCompany5929CarnegieBlvd.Suite500Charlotte, NorthCarolina28209Mr.G.R.PetersonSiteVicePresident CatawbaNuclearStationDukeEnergy~',orooration 4800ConcordRoadYork,SouthCarolina29745-9635 4h' CatawbaNuclearStationCC:Mr.T.RichardPuryearOwnersGroup(NCEMC)DukeEnergyCorporation 4800ConcordRoadYork,SouthCarolina29745RichardM.Fry,DirectorDivisionofRadiation Protection NorthCarolinaDepartment ofEnvironment, Health,andNaturalResources 3825BarrettDriveRaleigh,NorthCarolina27609-7721 CC:RegionalAdministrator, RegionIIIU.S.NuclearRegulatory Commission 801Warrenville RoadLisle,IL60532-4351 AttorneyGeneralDepartment ofAttorneyGeneral525WestOttawaStreetLansing,Ml48913TownshipSupervisor LakeTownshipHallP.O.Box818Bridgman, Ml49106U.S.NuclearRegulatory Commission ResidentInspector's Office7700RedArrowHighwayStevensville, Ml49127JeremyJ.Euto,EsquireIndianaMichiganPowerCompanyNuclearGeneration Group500CircleDriveBuchanan, Ml49107Mayor,CityofBridgmanP.O.Box366Bridgman, MI49106SpecialAssistant totheGovernorRoom1-StateCapitoiLansing,Ml48909DonaldC.CookNuclearPlantUnits1and2DrinkingWaterandRadiological Protection DivisionMichiganDepartment ofEnvironmental Quality3423N.MartinLutherKingJrBlvdP.O.Box30630CPHMailroomLansing,Ml48909-8130 GordonArentDirector, Regulatory AffairsIndianaMichiganPowerCompanyNuclearGeneration Group500CircleDriveBuchanan, Ml49107DavidA.LochbaumUnionofConcerned Scientists 1616PStreetNW,Suite310Washington, DC20036-1495 A.Christopher Bakken,SiteVicePresident IndianaMichiganPowerCompanyNuclearGeneration GroupOneCookPlaceBridgman, Ml49106MichaelW.RencheckVicePresident, NuclearEngineering IndianaMichiganPowerCompanyNuclearGeneration Group500CircleDriveBuchanan, Ml49107Mr.RobertP.Powers,VicePresident IndianaMichiganPowerCompanyNuclearGeneration Group500CircleDriveBuchanan, MI49107

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