ML17325A849

LER 86-023-02:on 860715,erroneous Accumulator Level Indication Resulted in Low Accumulator Vol.Caused by Three Defective Components in Instrumentation.Accumulator Vol Increased Per Tech Specs.W/880624 Ltr

ML17325A849
Person / Time
Site:	Cook
Issue date:	06/24/1988
From:	POSTLEWAIT T K, SMITH W G AMERICAN ELECTRIC POWER CO., INC., INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
LER-86-023, LER-86-23, NUDOCS 8807060119
Download: ML17325A849 (10)

Text

ACCELEBRATED 91S'JUUBUTION DEMONS~TJON SY~gMREGULATINFORMATION DISTRIBUTIOIYSTEM (RIDE))",ACCESSION NBR:8807060119 DOC.DATE:

88/06/24NOTARIZED:

NODOCKETFACZL:50-316 DonaldC.CookNuclearPowerPlant,Unit2,Indiana&05000316AUTH.NAMEAUTHORAFFILIATION POSTLEWAZT,T.K.

IndianaMichiganPowerCo.SMITH,W.G.

IndianaMichiganPoweCo.RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

LER86-023-02:on 860715,erroneous accumulator levelindication resulting inlowaccumulator volume.W/8DISTRIBUTION CODE:ZE22DCOPIESRECEIVED:LTR tENCL/SIZE:TITLE:50.73LicenseeEventReport(LER),IncidentRpt,etc.NOTES:RRECIPIENT ZDCODE/NAME PD3-1LASTANGFJINTERNAL:

ACRSMICHELSON AEOD/DOAAEOD/DSP/ROAB ARM/DCTS/DAB NRR/DEST/ADS 7ENRR/DEST/ESB 8DNRR/DEST/MEB 9HNRR/DEST/PSB 8DNRR/DEST/SGB 8DNRR/DLPQ/QAB 10NRR/DREP/RAB 10DR<IB9ARES/DE/EIB RGN3FILE01EXTERNALEGSrGWILLIAMSFSHSTLOBBYWARDNRCPDRNSICMAYSFGCOPIESLTTRENCL111111112211101111111111111111111144111111RECIPIENT IDCODE/NAME PD3-1PDACRSMOELLERAEOD/DSP/NAS AEOD/DSP/TPAB DEDRONRR/DEST/CEB 8HNRR/DEST/ICSB 7NRR/DEST/MTB 9HNRR/DEST/RSB 8ENRR/DLPQ/HFB 10NRR/DOEA/EAB 11NRR/DREP/RPB 10NUDOCS-ABSTRACT RESTELFORD,J RES/DRPSDEPYFORDBLDGHOYFALPDRNSICHARRZSFJCOPIESLTTRENCL11221111'1111111111111122111111111111hDhTOTALNUMBEROFCOPIESREQUIRED:

LTTR45ENCL44 NRCForm355(9.83)LICENSEEEVENTREPORTILER)U.S.NUCLEARREOULATOAY COMMISSION APPAOVEOOMBNO,31504101EXPIRES:8/31/88FACILITYNAME(I)D.C.CookNuclearPlant-Unit2DOCKETNUMBER(2)PAE3)o5ooo316>OF07TITLE(IlErroneous Accumulator LevelIndication Resulting inLowAccumulator VolumeMONTHDAYYEAREVENTDATE(5)LERNUMBER(5)YEARÃ~'.SEQVSNtIAL Pr~REVOKENVM888X5IIVM88RREPORTDATE(7)MONTHOAYYEARFACILITYNAMESDOCKETNUMBER(SI 05000OTHERFACILITIES INVOLVED(8)071586860230206248805000OPERATINO MODE(8)POWERLEVELTHISREPORTISSUBMITTED PURSUANTT50.73(e)(2)(ivl50.73(e)12)(vl50.nN)(2)(vB) 50.n(el(2)(vBII(A) 50,73(el(2)

(v)5)(BI9),73(~)(2)(el20A05(c)50.38(cl(1) 50.38(c)(2)50,73(eIl2)0)5073(el(2)(EI 50.73(e)(2)(51120.802(8)20405(~)(1)(l)20A05(el(I)(8)20A05(e)(1)(BII 20A05(el(1)(tvl 20A05(~)(I)(vlLICENSEECONTACTFORTHISLER(12)0THEREOUIREMENTS OF10CFR()I(CheckoneormoriOfthefollovffnfl (Ill73.7)(8)73.71(c)OTHERfSpeclfyInAhttrectOelowendInFeet,NRCForm3BBAINAMET.K.Postlewait-Technical EnineerinSuerintendent TELEPHONE NUMBERAREACODE616465-5901COMPLETEONELINEFOREACHCOMPONENT FAILUREDESCRIBED INTHISREPORT(13)CAUSESYSTEMCOMPONENT MANUFACTUREREP0RTA8L~',It~IIiCAUSESYSTEMCOMPONENT MANUFAC.TURERTONPROSXXBPECBDBPTDI204I204@~IXBPPITI204SUPPLEMENTAL AEPOATEXPECTED(lelEXPECTEDSU5MlSSIONDATE(15)MONTHOAYYEARYESf/fyet,completeEXPECTEDSUBMISSION D4FE)NOABBTRAcT(Llmlttote00tpecet,I.e.,eppronlmetely fifteentlncleepece typewritten llnnl08)Thisrevisionisbeingsubmitted toincludetheresultsofdiagnostic testingperformed duringtheSeptember 1987outage.BetweenJuly15and18,1986,problemswereencountered withtheprocessinstrumentation monitoring thevolumewithinaccumulator

)jj'2.Complications developed duringultrasonic testing(UT)conducted toverifyaccumulator operability whichresultedinthefailuretoidentifyaviolation oftheactionstatement associated withlowaccumulator volumeandamissedsurveillance forboronconcentration.

Theadministrative problemsassociated withaccumulator levelverification byUTwerecorrected.and thismethodwasusedinlieuoftheprocessinstrumentation toverifyaccumulator operability untilunitshutdownforanoutageMarch3,1987.Testingperformed duringtheMarch1987outage,determined thatthreeinstrument components weredefective; allwerereplacedinkind.OnApril26,1987ILA<<121begantodriftupwards.OnApril30,1987,asaprecautionary measure,ILA-121wasdeclaredinoperable.

Accumulator levelwasmonitored usingUTuntilunitshutdownonAugust27,1987.Testingperformed duringtheSeptember 1987outagedetermined thatoneinstrument component wasdefective.

Thecomponent wasreplacedinkindandtheprocessinstrumentation hassubsequently functioned normally.

NRCForm388(Be)3I88070609 880624PDRADOCK050003}6SPNU$6ZZ NRCForm3BBA(943(LICENSEENTREPORT(LER)TEXTCONTINUANU.S.NUCLEARREGULATORY COMMISSION APPROVEDOMBNO,3I50-0104 EXPIRES:8/3'I/88FACILITYNAME(I(DOCKETNUMBER(2)LERNUMBER(8(PAGE(3iD.C.CookNuclearPlant-Unit2TE/ET/~RRE>> <<~,~~//RCr3SBA<</(mYEARosooo31686SEOUENTIAL NUMBER023REVISIONNUMBER0202QF07Thisrevisionisbeingsubmitted toincludetheresultsofdiagnostic testingperformed duringtheSeptember 1987outage.Conditions PriortoOccurrence Unit2inMode1,RTPat48percent(91330hourson7-15-86)DescritionofEventTechnical Specification 3.5.lbrequiresthateachaccumulator (EIIS/BP-TK) mustmaintainbetween929and971cubicfeetofboratedwaterwhiletheunitisinModes1-3(PowerOperation, Startup,andHotStandby,respectively). Iftheaccumulator volumedeviatesfromtheprescribed limits,thevolumemustberestoredwithin1hourortheunitmustbeinhotshutdown(Mode4)withinthenext12hours.Processinstrumentation monitoring accumulator inventory (EIIS/BP-LIT) displayswatervolumeincubicfeet.Thesystemiscomprised of2indicators foreachaccumulator, onewiderange(300-1000cubicfeet)andonenarrowrange(900-1000cubicfeet).OnJuly15,1986,operators onshiftbecamesuspectoftheaccumulator 82volumeindication andrequested anultrasonic test(UT)beperformed toverifywaterinventory. QualityControlpersonnel locatedthewaterlevelusingultrasound andthenmarked/dated thetankaccordingly; however,duringthisprocesstheirdatasheetbecamecontaminated andwasdiscarded beforeleavingaccesscontrol.Anewdatasheetwassubsequently filledoutfrommemoryandtheControlRoomwasinformedat1330hoursonJuly15thataccumulator (/(2wasat115.75inches.Whenmathematically converted tovolume,thislevelcorresponds to969.58cubicfeet;which,bycoincidence only,happenedtocloselyagreewiththeprocessinstrumentation indication atthattime.OnJuly18,1986,at0800hoursanotherUTwasrequested foraccumulator /!2becauseofquestionable volumeindication. WhenQCarrivedataccumulator (/'2theydiscovered a10incherrorwasmadeintheJuly15report.Thelevelwasactually105.75inches(909.58cubicfeet)onJuly15,andnot115.75(969.58cubicfeet)asreported. Itcantherefore bededucedthatthelowerlimitforcontinued operation (929cubicfeet)hadbeenviolatedsinceatleastJuly15withouttheappropriate compensatory actionsbeingtaken.NRCFORMSBBA(EBSI*U.S.GPO:(BBB 0824538/455 NRCForm366A(84)3)LICENSEENTREPORT(LER)TEXTCONTINUANV.S.NUCLEARREGULATORY COMMISSION APPROVEOOMBNO.3(50-0104 EXPIRES:8/31/88FACILITYNAMEl()D.C.CookNuclearPlant-Unit2OOCKETNUMBER(2)31686LFRNUMBER(6)SEQUENTIAL NUMBER023REVISIONNUMBER020PAGE(3)OFTUCT(lmrsoEpsos/4rBEM)BI(, BBB///orrr/HRC /ronn36543)l17)DescritionofEvent(cont'd)Thiserrorwascompounded duringcommunications betweenQualityControlandOperations following theUTperformed themorningofJuly18.At0945hoursonthatmorning,QualityControlreportedthelevelofaccumulator f32hadrisen3inchessincethelasttestperformed onJuly15.Operations wasnotmadeawareofthe10incherrordiscovered earlier.Consequently, actingundertheimpression thataccumulator ((I2hadrisenfrom115.75inches(969.58cubicfeet)toavolumeexceeding theupperlimitingcondition forcontinued operation,'perations personnel declaredaccumulator 82inoperable baseduponhighlevel(itwasactuallylow)andmeasuresweretakentobegindrainingthetank.WithrespecttothevolumeincreasewhichoccurredsometimebetweenJuly15andJuly18,noconclusive evidencecanbeproducedconfirming thatsaidincreaseactuallyhappenedwithinasixhourtimespanpreceding boronsamplingperformed at0925hoursonJuly18.Therefore, theplantmustassumetheboronconcentration wasnotverifiedfollowing asolutionincrease>/1percentoftankvolumeasrequiredbyTechnical Specification 4.5.1b.Itshouldbenotedthatat0952hoursonJuly18,whilepreparations wereunderwayfordrainingaccumulator 82,Unit2trippedonasteamgenerator levelhigh-high signalthusplacingtheunitinMode3.Thiseventwasfurthercomplicated at1447hoursonJuly18whentheControlRoomwasinformedthatUTresultsplaced82accumulator's level3inchesbelowthelastmeasurement takenearlierthatmorning(duetodraining). Withthisinformation, andstillunawareofthe10incherrormadeonJuly15,Operations declaredtheaccumulator operablebecausetheybelievedtheapparently highvolumeofwaterhadbeenreducedtowithinacceptable limitsforcontinued operation. Inreality,theaccumulator volumewasdraineddownfromanalreadytoolowcondition toanevenlowerstatus.At1620hoursonJuly18,Operations becamecognizant ofthe10incherrormadeonJuly15.Itwasrecognized atthistimethataccumulator $!2was,andhadbeensinceatleast1330hoursonJuly15,inviolation ofthelowervolumelimitrequiredbyTechnical Specification 3.5.1b.Accumulator /f2wasimmediately declaredinoperable. Coolingofthereactorcoolantsystem(EIIS/BP-AB) toachieveMode4beganat1720hoursandtheNRCwasnotifiedoftheeventbyphoneat1808hours.Effortstowardsfillingaccumulator f/2viatherefueling waterstoragetank(EIIS/BP-TK) commenced at1839hoursandtheeventwasterminated at2120hoursonJuly18whentheaccumulator volumeandboronconcentration wereverifiedtobewithinthelimitingcondition foroperation asdescribed inTechnical Specification 3.5.1band3.5.1crespectively. CooldownwashaltedpriortoreachingMode4.Withtheexception oftheloop2accumulator volumeinstrumentation, therewerenoinoperable structures, systems,orcomponents atthestartofthiseventwhichcouldhavecontributed toitsoccurrence. NRCFORM366A(()4)3)oU,S.GPO.1 9880824538/455 0<iII NRCForm388A(943)LICENSEENTREPORT(LER)TEXTCONTINUA~NU.S.NUCLEARREGULATORY COMMISSION APPROVEDOMSNO3150-0104 EXPIRES8/31/88FACILITYNAME(11DOCKETNUMBER(2)LERNUMBER(BlPAGE(3)D.C.CookNuclearFlant-Unit27%XT/4/m<<oNMoo/sIFEo8or/, IrsoI/8/ooo/HRC R<<m35843/(17)osooo316YEAR@IrI86SEQUENTIAL NUMBER8rV023IIEVISION NUMSER0204OF07CauseofEventThecauseofthiseventhasbeenattributed totheinability oftheprocessinstrumentation toaccurately reflectthevolumewithinaccumulator 82,whichresultedintheneedforultrasonic testingtoverifyaccumulator operability. Threedefective components withinthesystemwerediagnosed astherootcausefortheinstrumentation failure.theinstrumentation consistsofacircuitboard(EIIS/BP-ECBD), straingauge(EIIS/BP-TD), potentiometer span(EIIS/BP-EC), potentiometer zero(EIIS/BP-EC) andanarrowrangedifferential pressureunit(DPU)(EIIS/BP-PIT). Theinitialinvestigation indicated thatthe"zero"wasdrifting, whichresultsfromafaultycircuitboardandstraingauge.Subsequently, thesecomponents werereplaced. Theinstrumentation subsequently zeroedproperly, butdatawasnotrepeatable vhenrangedupandbackdownthemeasurement scale.Asaresult,theDPUnarrowrangewasreplacedwhicheliminated therepeatability problem.Later,'he spanandzeropotentiometers verereplacedtoensureproperinstrumentation operation. Thecalibrated instrument wasreturnedtoserviceonApril2,1987,andfunctioned normallyuntilApril26,atwhichtimethesystembegantoexhibitsignsofdriftingupwards.Ultrasonic measurements takenafterApril26confirmed theactualvolumewithinaccumulator f/2wassteadyandwellwithintheTechnical Specification allowable range,however,theresultsalsoconfirmed thatILA-121wascontinuing aslowbutsteadyupwarddrifttowardstheadministrative limitforoperability. Asaprecautionary measure,ILA-121wasdeclaredinoperable at1328hoursonApril30,1987.Furtherinvestigation conducted duringtheSeptember 1987outageindicated thattherootcauseofthesecondinstrument failurewasafaultyDPUnarrowrange.TheDPUnarrowrangewasreplacedandthecalibrated instrument wasreturnedtoserviceonSeptember 24,1987.Theinstrument hassubsequently functioned normally. Contributing tothiseventwasthefactthatQualityControlpersonnel whoperformed theoriginalUTonJuly15didnotimplement soundworkpractices whileconducting activities inaradioactive environment. Thisresultedinthelossofhard.copydatasupporting testresultsforcingthoseinvolvedtorelysolelyuponmemoryrecall.ItshouldbenotedthattheUTwasperformed within-anextremely harshenvironment consisting ofelevatedtemperature andairborneradioactivity. Theseadverseconditions complicated effortsofthetestcrewbecausefullfacemaskwasrequiredandthefatigueprocesswasaccelerated. Inadequate communication betweentheControlRoomandQualityControlpersonnel furthercomplicated thisevent.Noformalmechanism hadbeenestablished toverifythatoperators onshifthadacompleteandaccurateunderstanding oftheUTresults.NRCFORMSBBA(948)*U.S.GPO:)988%.824 538/455 NRCForm366A(94)3)LICENSEENTREPORT(LER)TEXTCONTINUNU.S.NUCLEARREGULATORY COMMISSION APPROVEDOMBNO.3(9)&104EXPIRES:8/31/88FACILITYNAME(llDOCKETNUMBER(2)LERNUMBER(6)PAGE(3)D.C.CookNuclearPlant-Unit2TEXT/kmcY8<<>>48lrnr/I/EerE I/88T/I/or>>/HRC %%dnn35549/(17)YEAR3168602302(jar,SEGVENTIAL jZ':REVISION49NUM88Rv>errNUMSER05OF07AnalsisofEventThiseventisreportable underthecriteriaof10CFR50.73(a)(2)(i) asdescribed below.-Forapproximately 3dayspriortoJuly18,1986,thevolumeofaccumulator 82wasbelowitslowerlimitingcondition foroperation andthecorresponding actionstatement associated withTechnical Specification 3.5.1bwasnotsatisfied. -BetweenJuly15andJuly18,1986,accumulator 82experienced asolutionincreasegreater>/m1percentofthetankvolumeandtheboronconcentration wasnotverifiedtobeacceptable withinthenext6hoursasrequiredbyTechnical Specification 4.5.1b.Thesafetysignificance ofpoweroperation withaccumulator volumeofoneaccumulator at909.6cubicfeetratherthan929cubicfeetislimitedtoimpactontheloss-of-coolant accidentanalysis. Thelimitingloss-of-coolant accidentanalysisforUnit2Cycle6predictsapeakcladtemperature of2079degreeFwitha121degreeFmargintothe2200degreeFlimitspecified in10CFR50.46.ExxonNuclearCompany,thefuelvendorforCycle6,wasrequested toevaluatetheimpactofthiseventonpublichealthandsafety.Theirresponsestated:itisExxon'sopinionthatasignificant safetyhazardtothepublicdidnotexistforthefollowing reason.Thelimitingcaseinthereference indicated apeakcladdingtemperature (PCT)of2079degreeFforoperation atlOOXpower.Operation at90percentpowerwouldresultinareduction inthePCTandwouldtendtooffsetanyincreaseinPCTduetothereducedaccumulator liquidvolume.Thereducedaccumulator liquidvolumealoneisexpectedtohaveaverysmalleffectonthePCT.Theaccumulator flowwouldendapproximately 1secondsoonerthanthetimeindicated inthereference. Sincethisoccursafterthebeginning ofcorerecoverytime(BOCREC)whenthedowncomer isfull,averysmalladverseeffectonrefloodrateandPCTwouldoccurandwouldbemuchlessthanthe121degreeFmarginindicated inthereference." Itisofnotethatthedifference betweentheas-foundcondition (909.6cubicfeet)andthevaluespecified intheTechnical Specification of929cubicfeetis19.4cubicfeet,orapproximately 960lbs.ofwater.Inordertoconservatively evaluatetheeffectonpeakcladtemperature, ahypothetical scenariowasevaluated inwhichitwasassumedthatthiswaterwasdeficient duringtherefillperiod,andhadtobemadeupbypumpedin5ection water.Itwouldhavetakenthepumpsapproximately 1.1secondstomakeupthiswater.SincethePCTrateofheatupduringtheearlyreflood/refill periodisabout13degree/sec., thiswouldhaveresultedinaPCTincreaseofabout15degreeF.Adding15degreeFtothecalculated PCTresultsinanewPCTof2094degreeF,whichisstillwellwithinthelimitsof10CFR50.46.NRCFORMSStA(94)3)8U.S.GPO:1986.0.624 538/455 NRCForm388A(943)L'ICENSEE NTREPORT(LER)TEXTCONTINUANU.S.NUCLEARREGULATORY COMMISSION APPROVEDOMSNO.3150M)84EXPIRES:8/31/88FACILITYNAME{1)DOCKETNUMBER(2)LERNUMBER(8)PACE(3)D.C.CookNuclearPlant-Unit2TEXT/Smroodraco/rorR/)or/, I/44/8/orro/NRC Farm35(LE'4/(IT) 050003]YEARP~r~+86SEQUENTIAL gj<NUMBER023REVISIONNUMBER0206OFAnalsisofEvent(cont'd)Theactualchangeinpeakcladtemperature, hadanewanalysisbeenperformed, wouldhavebeenwellbelowtheabove15degreesFvaluebecausethedeficit,in waterwouldhaveoccurredafterthebeginning ofcorerecoverywhenheattransfermechanisms associated withrefloodwereinplace,andtheneedforaccumulator waterhadsignificantly lessened. Itisalsoconcluded thatthemissedboronsurveillance wasnotofsignificance, sinceaboronsampletakenat0925hoursonJuly18contained aconcentration of1975partspermillion(ppm),whichiswellwithintherequiredlimitsof1900and2100ppm.Basedonalloftheaboveinformation, itisconcluded thattheeventdidnotconstitute anunreviewed safetyquestionasdefinedin10CFR50.59nordiditadversely impactpublichealthandsafety.Corrective ActionsImmediate corrective/preventative actionconsisted of:1)promptlyincreasing accumulator volumetowi.thinTechnical Specification limitsandverifying acceptable boronconcentration; and2)obtaining independently verifiedUTlevelindication, atleastonceevery10hours,toensureTechnical Specification compliance whiletheprocessinstrumentation was/isoutofservice.Longtermpreventative actionwillbetoreplacealloftheaccumulator levelinstrumentation withFoxboroinstrumentation assimilarproblemshavebeenexperienced withseveraloftheotherITT-Barton instruments. Thereplacement isscheduled forUnit1duringitsscheduled 1989Refueling OutageandforUnit2duringitsnextscheduled refueling outagein1990.Thepersonnel responsible fortheinaccurate reportonJuly15havebeeninstructed intheappropriate methodsformaintaining cleanliness ofwrittendocuments whileinacontaminated environment, andtheimportance oftransmitting accurateinformation utilizedtoevaluateplantconditions. Thesepersonshavesincedemonstrated thenecessary skillstopreventarecurrence ofthiseventduringactivities performed undersimilarcircumstances. Toenhancetheeffectiveness ofcommunications betweenQualityControlandOperations personnel, thedatasheet(s)withintheultrasonic testprocedure havebeenrevisedtorequire:1)independent verification oftestresults;and2)UnitSupervisor/SRO reviewandsignature. NRCFORM3BBA(943)*U.S.GPO.'(988 0824538/455 NRCFORR35BA(983)LICENSEENTREPORT(LER)TEXTCONTINUNU.S,NUCLEARREGULATORY COMMISSION APPROVEOOMBNO.3150&104EXPIRES:8/31/88FACILITYNAME(1)D.C.CookNuclearPlant-Unit2OOCKETNUMBER(2)osooo31686023-02LERNUMBER(6)YEAR~+.SEQVENTIAL >y'EVISIONNUMBER.~%NUMBERPAGE(3)07QF07TEXTN/R/FBBP44B/4BqvlBI/IIFB//I/BIBBn/ HRC%%dnII35549/(17)FailedComonentIdentification Component: EIIS:Manufacturer: ModelNumber:CircuitBoardECBDITT-Barton 384Component: EIIS:Manufacturer: ModelNumber:StrainGaugeTDITT-Barton 386Component: EIIS:Manufacturer: ModelNumber:Differential PressureUnitPITITT-Barton 224-352PreviousSimilarEventsTherehavebeennosimilareventsinthepastwheretheplanthasfailedtomeettheactionstatement associated withaccumulator volumesbeingoutofspecification. Also,theplanthasneverfailedinthepasttoverifyboronconcentration intheaccumulators within6hoursfollowing asolutionincreaseof>/J'percentoftankvolume.NRCFORMSBBA(94)3)*U.S.GPO:1985.O.B24 538/455 IndianaMichiganPower".ompanyCookNuclearPlanlP.O,Box458Bridgman. MI491066164655901INDIANANICMIGANPOWERJune24,1988UnitedStatesNuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Operating LicenseDPR-58DocketNo.50-316DocumentControlManager:Inaccordance withthecriteriaestablished by10CFR50.73entitledLicenseeEventReortinSstem,thefollowing reportisbeingsubmitted: 86-023-02 Sincerely, W.G.Smith,Jr.PlantManagerWGS:clwAttachment cc:D.H.Williams, Jr.A.B.,Davis, RegionIIIM.P.AlexichP.A.BarrettH.B.BruggerR.W.Jurgensen NRCResidentInspector J.F.Stang,NRCR.C.CallenG.Charnoff, Esq.DottieSherman,ANILibraryD.HahnINPOPNSRCA.A.BlindS.J.Brewer/B. P.Lauzau}}