ML18038A045

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Final Instrumentation Rept,Geological Studies.
ML18038A045
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Site: Nine Mile Point 
Issue date: 07/31/1985
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DAMES & MOORE
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pFINALINSTRUMENTATION REPORTGEOLOGICAL STUDIESNIAGARAMOHAWKPOWERCORPORATION

.SYRACUSE, NEWYORKJULY1985,,"Bppgpgpggp 88p82bppg5'PDQCP'$000410..F,'DR C'.IVglj ERRATASHEETPINALREPORTInstrumentation GeologicStudiesNineMilePointNuclearStationUnit2Scriba,NewYorkJuly1,1985Page3line3change"located" to"heated"Line26change"totally" to"totaling" Page4Line15change"15"to"75"Page6Line4delete"from"Line11change"depthof37"to"elevation of147"Line15change"adepthof63"to"elevation 143"Line16delete"below63feet"Line26change"32"to"13"Line30add<<(figure32Page7Line1delete"thetimeperiodoverwhich"Line13change"exception of"to"exceptions ofHEX-1and"ne17changenQ05%nto>rQ005%nLine19change"0005"to"0.0005".

C' Line26add""after"swelling" andCapitalize "t"Line27change"responses" to"responds" Page8Lastlineadd"Figure33"after"EX-1"Page9L'ine10add"(Figure37A-C)"afterEX-S,andadd"(Figure38)"afterEX-6.Line16Change"June"to"July"Line17Change"June"to"July"Line27add"(Figure40A-B)"afterHEX-1andadd"(Figure41A-B)"afterHEX-2Line29add"(elevation 220-222feet)"after91feetLine31change"aong"to"along"Page10LastLineadd"G-6"aftergauges e

LISTOFTABLESTable1Piezometer DataLXSTOFFIGURESFigure12910ll121314151617.181920212223242627282930805810821806806820821SI-6SI-10SX-839-5137-7939-4513-21165-169157-165157-165160-16583-8957-75PlotPlanofInstrumentation PlotPlanShowingLocations ofInstrumentation intheVicinityoftheReactorComplexAreaComposite SiteStratigraphic ColumnInclinometer I-3Displacement vs.DepthSI-2SI-6SI-8SI-9SI-10SI-20SI-21SX-22SI-23803805806810820821Inclinometer 803Displacement vs.TimeFrom23-27feet

LISTOFFIGURES(Cont.)Figure31Inclinometer 32SI-9Displacement vs.TimeSI-23From63-79feet99-13733Extensome terEX-134A,B35A,B,C36AgB37A,B,C3839A,B,C,D,EgFg 40A40B41A41B42GapGage43444546474849505152535455EX-2EX-3EX-4EX-5EX-6EX-20HEX-1SonicProbeHEX-1Thermistors HEX-2DCDT'sHEX-2Thermistors Gl-AGl-BGl-CGl-DG2-AG2-BG3NormalG3ShearG4NormalG4ShearG5-AG5-BG6GV-1 K

FINALRHPOR'I'NSTR UMENTA'I'ION NINEMIIHPOINT-UNIT2SCRIBA,NHWYORI<NIAGARA'MOIRAWKPOWERCORPOR'ATION INTRODUCTION Thisisthefinalreportontheinstrumentation installed atNineMilePoint,Unit2toevaluaterockmassmovement.

Datapresented inthisreportarethroughFebruary1985.ThepreviousreportdatedSeptember 7,1984(DN-L1612) analyzeddataavailable throughJuly1984.AreportdatedMay18,1984(DN-L1583) provideddataandanalysisthroughMarch1984.PriortothatreporttheFSAR(Section2.5.4.13) provideddatathrough1981andtheresponsetoQ361.5provideddatafromthedateofinstallation through1980.Theinstruments, wheninstalled, servedmanypurposesrelatingtothegeologiccriteriaasitwasdeveloped throughthedesignprocess.Theinstruments maintained throughthecompletion oftheprogramservedtoconfirmtheadequacyofthesecriteria.

Thecriteriaasestablished weresummarized inourlettersofJanuary16,1981(DN-L0802),

May1,1981(DN-L0826),

andMay15,1981(DN-L0859).

SUMMARYANDCONCLUSIONSTheinstrumentation programwasbegunatNineMilein1977whenfourinclinometers wereinstalled tomonitortherockmass.Sincethattimetherockinstrumentation hasconsisted offourstressmeters, 25inclinometers (including thefirstfour),11extensometers, 7piezometers, and14displacement sensors.Whilerockmovements havebeenrecordedinseveraloftheinstruments, thenatureofthesemovements (magnitude, direction, rate)hasbeensuchthatweconcludethatthedesigncriteriaestablished forrockmovementaresufficient andwillnotbeexceededduringtheprojected lifeofthefacility.

Becausethelengthoftimeofthereadingcyclehasbeensuchthatfuthermonitoring oftheinstrumentation isexpectedtoyieldlittleadditional information relativetothesafetyofthestructures onsitethemonitoring programwasconcluded inFebruaryin1985.

DISCUSSION INCLINOMHTHRS Finaldepthdisplacement profilesforallinclinometers operational pastthetimeofthelastprogressreport(July1984)areprovidedinFigures4through18.Inaddition, tiine-disp'lacement andvectortraceplotsareprovidedforspecificzonesinwhichinovements havebeennoted.Thesefiguresateintroduced duringdiscussion ofthespecificinclinometers.

RadwasteThrustStructureFourRadwasteinclinometers (805,806,820,821)remainedaccessible andweremonitored totheendofthemonitoring program.Inclinometer 810wasmonitored untilNovember1984whenitbecameinaccessible becauseoficeinthecasing.Theseinclinometers havebeenreadsinceMay/June1980(805,806,810)andNovember1981(820,821)andprovidearecordofmorethanfouryearsoftherockmassthatcomprises theRadwasteThrustStructure.

Generally, analysisoftherecordsoftheradwasteinclinoineters haverevealedthreetypesofmovements

-cyclicseasonalchanges,smalllong-term displacements, anddisplacements apparently associated withtheriseinwaterlevelatthesite.CclicDislacements:

Thecyclicdisplacements arebestillustrated fromtherecordsofInclinometer 803(Figure14)whereagradualsouthwestward displace-mentwasrecordedintherocksofthetransition zonesbetweenelevations 222and226feet.AsshownonFigure20,themostrapiddisplacements inthiszoneoccurredinthesummei'onths (June,July,August).Thesedisplacements werepartially reversedduringthewinter,buttheunrecovered ornetdisplacement occurredatanannualrateof0.6+0.2millimeters (mm)fortheperiodofmonitoring.

Interestingly, thedisplacement ceasedinSeptembei 1981whentheRadwastetrenchwasfilledwithconcrete.

Whilethestrengthoftheconcreteitselfisinsufficient tostopthemovements, itisbelievedthatthefillingofthetrenchcut-offthesourceofwaterthathadaccesstotheRadwasteslipplanes(intersected in803)bymovingdownthedipofthestiucture fromtheRadwastetrench.Thishydrologic connection between

theRadwastetrenchandtheslipplanesin803alsohelpstoexplaintheseasonal(temperature-related) fluctuation intherockatadepthofalmost30feetbelowthegroundsurface.Warmerwater,collected andlocatedintheRadwastetrench,wasabletomovedowndipalongthebrokenzonesoftheRadwasteThrustStructure.

Thiswaterwarmedtherockmasscausingathermalexpansion duringthesummermonths.TheupperunitsoftherockmassmovedalongtheweakplanesoftheRadwastestructure andtowardtheopenexcavation tothesouthproducing netdisplacement towardsthesouthwest.

Astherockmasscooledduringthewintermonths(eitherfromthecolderwaterorlackofwater)itpartially recovered thedisplacement.

llowever, itissuspected thatthefabricoftheRadwasteThruststructure (transport'to thewest)prevented thefullrecoveryandresultedinthenetdisplacement tothesouthwest.

Lon-TermDislacements:

Thelong-term displacements intheRadwasteThrustStructure havebeenillustrated withthedisplacements recordedatEleva-tion215feetininclinometers 805,810and821(Figures2l,22,and23).Themaximumdisplacement measuredinthiszoneisfrom810whereapproximately 1.75mmofmovementhasbeenrecordedoverthe4.5yearsofmonitoring.

Althoughthedisplacement withtimealongthiszonehasnotbeenuniform,thestartoftheseverysmalldisplacements wasinitially recordedbeforeanyriseinthesitewaterlevelsandthezoneofmovementisgenerally abovethelevelofwater.Therefore, thedisplacements areattributed tominoradjustments alongtheRadwastestructure.

Neitherthe.magnitude notthedirection (north)ofthesemovements willaffectexistingstructures atthesite.Themostsignificant movementdetectedintheRadwasteinclinometers occursatElevation 244ininclinometer 806(Pigure24).

Atthislocationalmost3.5mmofdisplacement haveoccurredsincetheinclinometer wasfirstmonitored inJulyof1980.Thedisplacements wereveryminoratfirst,totallyonlyabout0.1mmbySeptember of1981,but,sinceOctober1981therateofdisplacement hasincreased andhasaveragedslightlyover1mm/yrsincethattime.Alinearprojection ofthisrateoverthe40yearlifeofthefacilitywouldexceedthedesigncriteriafortheRadwastestructure, however,thelocationofinclinometer 806andthenorthwest direction ofmovementprecludethesemovements fromaffecting theplantstructures.

Additionally, inclinometer 805isdirectlybetween806andthereactorexcavation anditdoesnotshowasimilardisplacement atthiselevation.

Similarly, inclinometer 810

totheeastof806,hasnotrecordeddisplacement atthiselevation.

Theisolatednatureandshallowdepthofthedisplacement recordedin806suggestthatthedisplacement stemsfromalocaldisturbance ot'xcavation nearthetopofbedrock.Hventhoughnosuchcondition hasbeenidentified themovements in806are>>otconsidered significant tothelongtet'mstability oftheexcavations.

lliseinWaterLevels:Movements relatedtotheriseinwaterlevelatthesitecanbefoundontherecotdsofInclinometers 806,820,821(Figures25,26, and27).Thesedisplacements alloccut'ithin Hlevation 89and97feetandthertetdisplacetnent resultsintheupperblockbeingtransported tothenorthwest orwest-northwest.

Themovements beginearlyin1983coincident withtheriseirtwaterlevelintheshaft(fromelevation 125feettobetweenelevations 200and220feet)a>>dinthereactotexcavation (fromElevation 1G3feettoelevation 20Gfeet).Irttheintervening 26months,thiszonehasproducedanaverageyearlydisplacement ofbetween0.33mm(806)and0.50mm(820).Significantly, 820and821locatedwithinapproxhnately 15feetofeachothethavenearlyidentical averagedisplacetnents (0.50mmand0.46mmrespectively) and806,located.another400feetinthecast(fattherfromtherewatering point)showstheleastreactiontothetewatet'ing.

TheeffectsoftheJuly1984riseinwaterlevelinthescreenwall buildingtoelevation 230feetmaybedetectedasaslightincreaseintherateofdisplacement inthetltreeinclino!neters.

Itispostulated thatthedisplacements recordedin806,820and821maybetlteresultoftheriseinwatet'evel producing abuoyancyeffect(reducing theeffective normalstress).ThiscoupledwiththeH-Wdirection ofthemaximumcompressive stressandthepronottnced fabricdeveloped ontheRadwastestructure resultsinsmail,irreversi-bledisplacelnents towardsthewest-northwest.

hconservative straight-line pro-jectionofthemaximumrateofdisplacement (0.50mm/yr)overa40yearperiodresultsinatotaldisplacement (20.0mm)thatislessthanthedesigncriteriaestablished fortheltadwaste structure.

Inconclusion, themonitoring ofthel<adwaste inclhtometers ltasshownthatareasoftheRadwastestructure canbesensitive tofluctuations inwaterlevelsandtemperatures.

Thesefluctuations candisturbthebalanceofthestt'ucture a)tdcanresultinmovements thattakeadvantage oftheestablished fabricofthestructure.

Despitethissensitivity tothechanges,monitoring hasdemonstrated thatthenatureandmagnitude ofthemovements, evenifprojected tothefull40yearsofexpectedplantlife,arewithintheestablished designcriteria.

IntakeShaftAtthecloseofthemonitoring programonlyfiveinclinometers (SI-2,SI-6,SI-8,SI-9andSI-10)remainedaccessible intheintakeshaftarea.Threeoftheseinclinometers (SI-8,SI-9,RSI-10)weremonitoring therockmassbetweenthetwocirculating watertunnelsandtwo(SI-2andSI-6)arelocatedwestoftheintakeshaft.Themonitoring oftheintakeshaftinclinometers hasdemonstrated threedistincttypesofbedrockmovement; elasticresponsetoexcavation oftheshaftandtunnels,deformation inresponsetorisesinwaterlevels,andtisane-dependent defor>nation.

displacement-depth profileofinclinometer SI-6(Figure6)whichclearlyshowsthemovementoftherockmassinresponsetotheexcavation ofthenorthtunnelatanelevation ofapproximately 140feet.Atadistanceofapproximately 40feetfromthetunneltheinclinometer hasrecordedupto9.75mm(0.384inches)ofmovement.

Thismovementinitiated immediately aftertheexcavation ofthatsectionofthetunnel.Becausethistypeofmovementoccursinresponsetoexcavation andtherockmassadjuststothenewstressconditions beforeanystructures arecompleted withintheexcavation, itisnotconsidered asdeterimental tothesafetyofthefacility.

RiseinWaterLevels:Deformation inresponsetorisesinwaterlevelsareevidentonthetime-dependent plotsofalltheinclinometers thatweremonitored untiltheendofthemonitoring period.Allshowanabruptriseindisplacement nearthebeginning of1983whentheintakeshaftwasfloodedandmostillustrate asmallincreaseintherateofdisplacement afterJuly1984whenthewaterlevelintheshaftwasallowedtoriseagain.Theincreaseindisplacement rateisoftenabrupt,butgenerally thisratepersistsforlessthantwomonthsbeforereturning toasteady-level ofnodisplacement orverysmalllongtermdisplacement.

Thetime-displacement plotforelevation16l167feet inInclinometer SI-10illustrates thiseffect(Figure29).Afterinstallation inlate1981,SI-10didnotexperience anysignificant displacement along

thiszoneuntiltheperiodfromJanuarytoMarch1983whentherewasanetdisplacement of0.38mminresponsetothefloodingoftheshaft.PromMarch1983toJune1984thenetdisplacement onlyincreased by0.06mm.FromJunetoAugust1984,thedisplacement increased fromby0.58mminresponsetotheriseinwaterlevelandbetweenAugust1984andPebruary1984thedisplacement hasonlybeen0.08mm.Becauseitisclearthatthesedisplacements aredirectlyattributable towaterlevelchanges,theyarenotconsidered tobedetremental tothesafetyofthesitestructures.

Time-DeendentDeformation:

Time-dependent deformation intheintakeshalfinclinometer isillustrated inthetime-displacement plotsofSI-8(Figure30)andSI-9(Figure3l).Belowadepthof57feet,inclinometer Sl-8showsaslowdisplacement towardsthesouthwest.

BetweenlateDecember1981andFebruary1983thiszonedisplaced 0.30mm(approximately 0.26mm/year)andthissamezonedisplaced by0.33mmbetweenMarch1983andJune1984(also0.26mm/yr).Similarly, inclinometer SI-9demonstrates aslow,timedependent deformation belowadepthof63feet.BetweenMarch1983andSeptember 1984,thisareabelow63feetmovedtowardthesouthby0.50mm(annualrateof0.33mm/yr).Conservatively assumingastraightlineprojection over40years,thiswouldamounttoatotaldisplacement rangingbetween10.56mmand13.33mm,wellbelowthedesignlimitofoneinchforrocksqueeze.ReactorExcavation Ofthefourinclinometers installed specifically tomonitortherockmassinthevicinityofthereactorexcavation (SI-20,SI-21,SI-22,SI-23)onlySI-23hasrecordedanydiscernable movement.

Threeoftheinclinometers (SI-20,SI-21andSI-23)weremonitored untilFebruary1985andSI-22wasmonitored untilOctober1984.Thedisplacement inSI-23(Pigure32)consistsofawestwardbulgebetweenthedepthsof50and130feet(Elevations 202and122).Thisbulgeappearstoreachamaximumatadepthofapproximately 100feet(Elevation 152)belowthegroundsurfaceandtheattainedamaximumdisplacement ofapproximate 0.90mminthe39monthsthattheinclinometer hasbeenmonitored.

I Althoughthetimeperiodoverwhichtherateofdisplacements fromthiszonehasbeenirregular, ifitwasassumedthatthe0.50mmofmovementoccurredinalinearfashionfromthedateofinstallation, therateofdisplacement wouldbe0.28mm/yrandthe40yearprojection would,be11.08mmsignificantly belowthedesigncriteriaofoneinch.EXTHNSOMETERS GeneralAseriesofextensometers hadbeeninstalled atthesitetomonitorverticalchangesintherockmass.Theseextensometers wereplacedintwoareas:eastofthereactorexcavation andaroundtheintakeshaft.Fourverticalextensometers (EI-1,EX-5,HX-6,andEX-20)andoneinclinedextensometer HEX-2werereaduntiltheendofthemonitoring program.Extensometer dataarepresented onFigures33to41.Generally, theextensometers (withtheexception ofHHX-2)wereinstalled

~~~~tomonitorverticalchangesintherockmassresulting fromtheraisingofthewaterleveLThischangeinvolume,termed'rockswell',hadbeenobservedinrockcoresextracted fromboringsatthesite.Designlimitsforrockswellhavebeenestablished as0.05%oftheheightoftherockcolumnbeingresaturated.

Asanexample,ifthewaterlevelrisesfromElevation 200to210feetatoneparticular

location, thedesigncriteriaallowsforatotalverticalswellatthatpointof.0005feet.ReactorExcavation Extensometer EX-20(Figures39A-39F)locatedapproximately 20feeteastofthereactorexcavation, istheonlyextensometer inthevicinityofthereactorexcavation.

ReadingofEX-20beganinlate1981andcontinued untilearly1985whenthemonitoring programwasdiscontinued.

Ingeneral,themonitoring atEX-20demonstrated thattherockunitsintersecting thereactorexcavation arerelatively stableandnotsubjecttosevereswellingtheonlynoticeable variations inreadingshavebeenintheupper15feetofrockthatresponses toseasonaltemperature changes.

Beginning inMay1984,anumberofanamoulous readingswererecorded.

Thereadingsofthesubsequent monthsfluctuated widelyandcharacteristically showedoppositemovementbetweenadjacentzones.Thisisindicative ofmovementontheintervening (orcommon)anchoranditwassuspected thatanchorslippagehadoccurred.

Becausethereadingscontinued tofluctuate, theextensometer wasdismantled andinspected attheendofthemonitoring program.Thisinspection confirmed thesuspicion ofanchorslippageasalltheanchorswereeasilyremovedwithonlymoderateupliftforceontherods.Consequently, allreadingsfromMay1984ateconsidered invalidandhavenotbeenutilizedinanyassessment ofthepotential forverticalswellatthesite.Belowthebottomofthereactorexcavation inEX-20,twozones(6-7and7-8)recordedasmalllong-term expansion.

Inthe30monthsofmonitoring uptoMay1984,zone6-7(Elevation 127-92feet)recordedapproximately

0.0 15inchesofexpansion

andzone7-8(elevation 92-54feet)recorded0.019inchesofexpansion.

Intotal,the197.6feetofrockcolumnbetweentheextensometer headandthebottomanchorexpandedby0.067inchesbetweenDecember1981andMay1984.Ilowever, themajorityofthisexpansion (0.034ofthe0.067inches)occursbelowelevation 127feetwhichisbelowthebaseofthereactorexcavation and0.033inchesofthetotalexpansion isattributable totheupperrockzone(elevation 251-237feet)whereseasonalfluctuations areevident.Infact,the0.033inchesmeasuredfortheuppermost zoneismisleading becauseitcomparesaperiodofhighexpansion (May)tothemonththattypically hasthelowestvalues(December).

Anexamination oftherecordindicates thattakingintoaccounttheseasonalfluctuations, thiszonehasnotexpanded.

Consequently, itcanbeconcluded thattherockmassinthevicinityofthereactorexcavations isfreeofsignificant verticalvolumechanges.Onlytherockunitsbelowthedepthofexcavation areexperiencing anymeasureable changesandtheseareverysmall.IntakeShaftOfthesevenextensometer sinstalled intheareaoftheintakeshaft,three(HX-1,HX-5andEX-6)weremonitored untilthecndoftheinstrumentation monitoring program.Overall,extensometer EX-1showedagradualcompression of

therockmassfromthetimeofitsinstallation (December 1979)untilthebeginning of1983whentheshaftwasflooded.Sincethattime,theverticalextentofthemeasuredrockmasshasremainedfairlyconsistent withonlyaslightextension inthezonebetweenelevations 172and130feetandacorresponding slightcompression inthezonebetweenelcvations 130and97feet.Overall,EX-1hasexperienced atotalvolumereduction ofapproximately 0.040inchesoveritslengthof164feet.Thisreduction isattributable tothedryingoutoftherockcolumnduringthedewatering phase.Sincethefloodingoftheshaftthecolumnhasnotexpandedbuthasheldconstant.

Extensometers HX-5andEX-6,locatedontheeastbenchofthe"intake shafthaveshownsimilarbehavior-predominantly influenced bytherisesinwaterlevelintheshaft.TheeffectoftheriseinwaterlevelinJanuary1983isillustrated inHX-5wherethezonesbetweenelevation 214and133feetexpandednoticably.

AboveElevation 214feettherockremaineddryandcontinued shrinking.

Below133feettherockinitially contracted thenexpandedslighltybeforeremaining fairlyconstantuntilJune1984whenthewaterlevelwasraisedagain.ThisraisingofthewaterlevelinJune1984isapparentinbothHX-5andHX-6,particularly inthezonebetweenelevaitons 173and133feet.SinceJune1984thiszonehasexpandedby0.027(HX-6)and0.030(EX-5)incheswithmostoftheexpansion inthefirstmonthandtherateofexpansion decreasing rapidlywithtime.Thereislittledoubtthattherockmassatthesiteisaffectedbythepresenceofwater.Theloweringofthewatertableproducesanoticeable dryingandshrinkage oftherockcolumnandthereapplication ofwaterallowstherockunitstoexpand.lkowever, themonitoring hasshowntheswellingtobefairlyrapidwiththerateofexpansion decreasing rapidlywithtime.INCLINEDEXTENSOMHTER NeitherHHX-1norHHX-2hasdemonstrated anysignificant movementoftheserockmassattheirlocations.

HHX-2doesillustrate somenearsurfacetemperature fluctuations andaseasonalfluctuation atadepthof84to91feetwhetetheRadwastethruststructure isencountered.

Itissuspected thatgroundwatermovingaongthefractured rockoftheRadwastestructure reachesthiszoneandcausesittoexpandorcontractdepending ontherelativetemperatures oftherockand

water.Thisreactionwaspreviously encountered inInclinometer 803whereitintersected theRadwastestructure.

GAPGAUGESTheprogramformonitoring thestructural gapsbetweenCategoryIstructures beganinthefallof1981.Atotalof14gaugelocations weremonitored, manywithmultipleinstruments.

Theresultsofthemonitoring arepresented in(Figures42to55).Inmostofthelocations, thedisplacement normaltothereactorcontainment ismeasuredbut,inseveralinstances (G2A,G3S,G4S),ashearcoinponent isalsomonitored.

Ingeneral,allofthegapgaugesprovidesimilarresults:acyclicvariationofthegapwidthinphasewithseasonaltemperature variations.

GapgaugesG-SAandG-5Bprovidealmostidentical resultsdespitethefactthattheyarelocatedatoppositeendsofthereactorexcavation.

This,coupledwiththefactthatthereadingsateproportionally identical tothetemperatures indicates thereisnonetclosure(oropening)inthenorth-south direction.

Movementintheeast-west direction canbestbededucedfromexamina-tionoftheG1seriesofgauges.GaugeGl-8hasbeenmonitored forthelongestperiod(sinceNovember1981).Becausetheseasonaltemperature variations havebeendampedasaresultofenclosure oftheareanearthegauges,thereadingshavebeenfluctuating aroundanewbaselevelsincetheearlysummerof1982.Giventhisnewbaseline,thereadingsdonotindicateanetclosureofthegap.Thesameobservation canbemadewithgaugesG6andGID.Asdiscussed inpreviousreports,whenconsidered inconjunction withtheaccomplanying normalgauges,thesheargaugesdonotindicateanysignificant movements orclosureofthegapbetweentherockexcavation andtheplantstructures.

Overallthegapgaugesprovideadetailedmonitoring ofthestructural gapprovidedforinthedesignofNineMilePointUnit2.Thismonitoring hasdemonstrated thattheadequacyofthegapdesign.10

Piezometers Fourpiezometers weremonitored untiltheendofthemonitoring program.Piezometers PI-l,PI-2,PI-4andPI-5recordedthewaterlevelchangesintheareaoftheintakeshaft(PI-4wasdiscontinued inOctober,1984)andPX-20monitored thewaterlevelstotheeastofthereactorexcavation.

PI-20indicates that.thewaterlevelinthisareahasremainedconstantofaboutelevation 185feet.Waterlevelsrecordedbypiezometers PI-l,PI-2,PI-4,PI-5,PI-20,andPI-21areshowninTablel.Thepiezometers wereusedinthisprogramtodocumentthechangesinwaterlevelsatthesiteandprovidedinputtotheinter-pretation oftheotherinstruments data.Nospecificdesignrelatedcriteriaareappliedtothemonitoring ofthepiezometers themselves.

TABLEPIEZOMETER DATADATEINSTRUMENT'ENSOR WATERLEVEL(ft~)SENSORELEVATION (ft.)81/86/83PX-181/24/83PI-182/88/83PI-182/21/83PI-183/89/83PI-184/86/83PI-184/29/83PX-186/15/83PI-187/12/83PI-188/15/83PI-189/13/83PI-1'18/21/83 PI-1ll/18/83PX-112/27/83PI-181/24/84PI-182/15/84PI-1ABABABABABABABABABABABABABABAB177.14287.36287.87288.28289.61211.85211.22283.67287.99216.59215.84286.21218.99288.98289.61285.29286.84285.75218.99218.82218.99286.44289.84289.98212.84216.82217.91218.59218.37283.21217.22Page1ofA=131.8B=181.8

.TABLE1(cont.)DATEINSTRUMENT SENSOR03/21/84PI-1ABWATERLEVEL(ft.)201.82SENSORELEVATION (ft.)05/08/84PI-106/22/84PI-107/18/84PI-109/05/84PI-1ll/01/84PI-112/04/84PI-1'0l/18/85 PI-102/21/85PI-1ABABABABABABABAB215.44221.37205;52215.84227.43215.61242.20238.68241.74238.21241.74238.68241.51238.68242.66239.83.01/06/83 PI-201/24/83PI-202/08/83PI-202/21/83PI-203/09/83PI-203/24/83PI'-204/06/83PI-204/29/83PI-2ABABABABABABAB175.92205.42.204.99216.72207.29218.11208.22219.49208.91223.41208.91219.95215.83221.80208.45219.03Page2ofA=160.0B=189.5

TABLE1(cont.)DATEINSTRUMENT SENSOR07/12/83PI-2ABWATERLEVEL(ft.)202.91216.26SENSORELEVATION (ft.)08/15/83PI-209/13/83PI-210/21/83PI-2ll/22/83PI-212/27/83PI-2Ol/24/84.PI-2.02/15/84PI-205/08/84PI-206/22/84PI-207/18/84PI-209/85/84PI-209/28/84PI-211/01/84PI-212/04/84PI-201/11/85PI-202/21/85PI-2AB203.83219.03205.22217.65204.29216.72206.37220.88211.22222.26209.83220.88205.45223.64209.37225.03287.99223.64218.83232.18228.29241.64228.75241.64229.21240.95229.21238.87230.59237.25238.13236.79Page3of C

TABLE1(cont.)DATEINSTRUMENT SENSOR81/86/83PI-3ABWATERLEVEL(ft.)174.99SENSORELEVATION 81/24/83PI-382/88/83PI-382/21/83PI-383/89/83PI-383/24/83PI-3ABABABABAB285.44287.76288.98218.76218.51212.38288.44211.22284.29287.76A=138.8B=181.881/86/83PI-481/24/83PI-482/88/83PI-482/21/83PI-483/89/83PI-483/24/83PI-484/86/83PI-484/29/83PI-486/15/83PI-487/12/83PI-4ABABABABABABABABABAB192.11196.31218.79289.88213.33212.23214.25213.61217.94215.92213.18211.87218.41217.76212.64214.38213.18211.99288.82289.69A=168.5B=194.8Page4of

TABLE1(cont.)88/15/83PI-489/13/83PI-418/21/83PI-4ABAB18/18/83PI-482/15/84PI-485/89/84PI-486/22/84PI-487/18/84PI-4ABABABA'BDATEINSTRUMENT SENSORWATERLEVEL(ft.)218.79214.76212.18213.38289.87212.69211.72216.15218.33221.22214.25222.61213.56219.15224.17SENSORELEVATION (ft.)89/85/84PI-489/28/84PI-4ABAB234.32238.76234.79239.2281/86/83PI-581/24/83PI-582/88/83PI-582/21/83PI-583/89/83PI-583/24/83PI-584/86/83PI-5ABABABABABAB177.61218.31286.67214.92288.86216.38289.44217.69287.83217.88285.98214.92216.36221.61Page5of

TABLE1(cont.)84/29/83PI-5ABDATEINSTRUMENT SENSORWATERLEVEL(ft.)287.68219.87SENSORELEVATION (ft.)86/15/83PI-587/12/83PI-588/15/83PI-589/13/83PI-518/26/83PI-511/18/83PI-512/27/83PI-581/24/84PI-5I82/15/84PI-585/89/84PI-586/22/84PI-587/18/84PI-589/85/84PI-589/28/84PI-5.11/81/84 PI-512/85/84PI-5ABABABABABABABABABABABABABAB288.98217.69283.45216.76284.83219.99285.29215.84288.91216.53287.37228.69213.68224.61289.67224.38284.14225.76211.29226.68218.27224.84222.72232.22234.82241.22234.36238.91234.36237.53233.67236.84Page6ofA=122.7B=282.8

TABLE1(cont.)WATERDATEINSTRUMENT SENSORLEVEL(ft.)81/18/85'X-5-A233.98B237.53SENSORELEVATION (ft.)82/21/85PI-5233.98237.5386/15/8387/12/8388/15/83PI-28PI-28PX-2889/13/83PX-2818/21/83PI-2818/26/83PI-2811/18/83PX-2881/24/84PI-2882/22/84PI-2885/88/84PI-2886/22/84PX-2889/85/84PI-2811/81/84PI-2812/85/84PI-2881/86/83PI-2881/24/83PI-2882/88/83PI-2882/21/83PI-2883/89/83PI-2883/24/83PX-2884/86/83PI-2884/29/83PI-28172.98178.86177.82177.59211.97218.58212.28212.89213.35179.21179.21176.98177.36173.44177.36178.75176.98177.59177.82187.51184.85185.67156.6Page7of8

TABLEl,(cont.)

DATEINSTRUMENT SENSOR81/18/85PI-2882/21/85PI-28WATERSENSORLEVEL(ft.)ELEVATION (ft.)185.67181.5282/16/83PI-'2182/21/83'PI-2184/86/83PI-2184/29/83PI-2187/12/83PI-2188/15/83PI-211'83.48183.48212.89213.81183.82182.56155.8Page8of8

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.080F070.060.050.040II\i~I.030.020.0100-.010II~III~~~I.100.090<:'~iit~i;~~II~III~IIIIIf~~I'I;..1,!:II~~I'j'I-~Ii~IIIIIIt:-Ii'jaI~I~~II~II~I~~IIr~~I~~I~~~I~I~III~'I~IIII~~I~~~-.-~III~r~Ir~~I~PII~~II*~~~I~~IrIII~~I~~I\'IIIII~II~~IIIELEV..177.0'56.0'010 0-.010-.020-.030-.040-.050-.060-.070-.080-.0900-.100-.110I~IIIIIII~~I!1I~sII~IIIsI~~I~I,s.'I~IrII~II~I~~~~'II'~III(~0~I~IIIII~II~~IIIIrI~I~IIIIII~III~~rII~I!~j!j(~>>IIIIII~I'II~IIIaaIaIII~II~I~~~i~I~I~II~."II~I~~~I~I~I~II~~~IP~PI~~I~I~~~i~~~~r-~~I~i~IIIP~~~~IIIS'IsII'~~III!i:lIII156.0'27.0' gu0g0Irg000~gIu0Nrr0g0000~g~10gN0g0g'0agN0kr'uaa000v00N~gag-raasr0g00g000'g~NaaI~982I983I9841985EXTENSOMETER EX-20NINEMILEPOINTNUCLEARSTATIOUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE39D

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ELEV..200.190.180.170.160.150.140.130.120.110kl.10054.090IN.080.070.060.050.040.030.020.0100-.010~i~~.-i~251.6'4.0'Total) 0000<<0t0<<<<I<<V0<<V'0V<<<<<<00000VI0<<R00<<00<<0<<~1V00<<<<00V00V~00C00<<~~<<~IgV<<-~~0~P0~~z.0Ie82Ie83I~84Ici85EXTENSOMETER EX-20ININEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE39F V)4 OINlqOIOOOI~intI'I~I'I~ICO0)IIIMQ~IMit~iiM~IIm!tEI~I~lfit~It~IM~1IM'llIPlI00(I>IIII~IV~I~~'II'\~~~'I11~~IOI~~~Il00n>'IIIoOIOOOOOOooooIISenatoroOooOIooOooIOOrtOooIEXTENSOMETER HEX-ISONICPROBENINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE40A t ELECTION.040.030.020.0100-.010-.020.010IIsII!,'i!IIIIiIII~~~~II~~~JI~~IssIII~(~IJI~~~I~II~I~II'II',:IiIIII/IIII;'i'jsJI~~I~~Ij~~II~~~~IJI\~IIIIi..',IIsII~-I-246.0'32.0' -.010IIi232.0'230.0'0100-.010.0100-.010'III.f-III~sI~II~IIIII~III~IIi!lI~III~I~IIrII~'JI~~.ItItt~~Ir~~II'P~srII~J~I~~J230.0'226.0'-226.0'222~0'0100-.010.0100-.010JII~~I~I!~I~~I~II~III,I.i'II~Ii~II~~~IIIlIIII~IIIIJ~~IIJ~~Jt~P~~~Is~II~I~~~I~I'I222.0'220.0'20.0' 208-0'030 .020~0100-.010IsII."i-l-~-I,'iIiil(I~IilIiIJIIi~'IIIIIsIII~~I~~~I~I~IIIIIII~III~~I~~IIII~III~I~II~~J~I~IsII246.0'208.0'00000~~Vhh't~0~JaVOLV'P44040aOg000V0V00~I44v~~hh000V40hv0h0h~\400000ah0'hIe83ie84ie85EXTENSOMETER HEX-2DCDTNINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE41A

2010~~fii..lIDEPTH0-45'0045'52.5'*52.5'70.5'PI5EvV'50~'fi>>'fii~I~fik70.5'84'4'91'50591'132'I0-132'i~'0fii0000~~010I~fi0Q0000ff~ff0~i0i000fi'fifi00~~,1t0+e0fiia~'u~0'000vu0v~fit~t0~~ff000Iff~07Ie83Ie84Ie85EXTENSOMETER HEX-2THERMISTERS NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE41B 0 .630Ii).610tCJ590.5ZO.5505.530.510IiIIt~I~III~~I~~IIIIII!;II!~,!~'I~(~~II~'III!III'iIIIIIIII~"~(~1III~II.l,.!I~ItI~II~~~~I7It~7~~~~IIIIIII'~~~~~~I~(7~ItIIII~I~~I~iIIIII\I~II~I7IIIII~II~~~III~lI~7~III~~7II~I~7':I'I:~!~~7~~~7I~I~~~~~~~~I777II~~~II~I~7~~~~~~~I7It't~~IIi~~I~~t~~77I~77~~I~1~~7'h.I~~I77-.06f,--.04,,--.020.-+.02;f-+.04I77IIII~IaIi)H5055>5J0tg50VI5V55V5550~I,1VI500010V5V'55Iutvt:u55v00v~I05010ti515I5v057'u0v~0050c~V1.le82le83le841985GAPGAGEG1ANINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE42

.710.690.670~~~I~=I~~~II~IileemiI~\IJJ+,~l'I'I~II~I~I~I~eIII~It~IiIII~tI'I~IIt~I~I~~~~~I.-.'.08-.06~~1II~IIII.'I.550~~I~lIIII~-~II~II.530.510,I~IIt~IIIItq.650630I-ia.610fqQ.590.570I'~i~~I~i~~~~IIilIIIiI~I~IiIIIIII~~-II~I~i~~i~If~ll"ll~~e/lIIlI~eei~~II~I~~I!~1~i\ItI~Ii~~~jI~IlII~t~~I~~eII~~~~J~I~IlI~lI~~~t~t'eIeI~~I~I~~~~e~IIIlltet~~~~~llIIII~I~IeI4ttItt~~IeI~IIIt~IIt~~'II~e"~--.04-.020+.02+.04+.06+.08+.10a0)kiO0)~BOHiii:.I~t~l~I'iIII~~Ii..i....l.IIIIII~I'.,t~=~IItI~~~III~I~'tIll~II~L1II~~~~ft:I:;LIiIJ.l..l.'I..l..e,.II~I~I--~~iI~i~I~lili'"jII~I~~~I~I~I~I~~~lIiII',2leeIT~I'Il.,lIIt~~~~hII:ur0D~I00000>0vIit~I'V00001hlhhhVO000<<0~V'hIh7V000h~h00RD0\ghhXV>~xv0o~'u0t00itle82le83le841985GAPGAGEGIBNINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE43 d .460.440.420.400tCI.380~360.340~I~iI~III~1ifI'!i!iiiI~I1III~~II~~I~~I~IIII~II~I~II1I'Ir~1I1~II~~~I~'\IIiI1~~1EIiiIII1~II~1~~I11~*~I~~1~I~~I1I1~I~-.06-.04-.020+.02+.045'PI0fq+:~~~I1~~III~I~IIIIf'II~IIIII~I~~~CIIIIII~I~I~~~II~~~II1~I.l:'..:i!II~~I~II~II~~1Ii~~1~i~~I1fIjIi:.i'1~~~i~II~~IIIItQ0g00EIrEE1EI~IV~Evokviuv00v'1E110t0iVzv0g1:iu00000IweE00E0raEVEEE1EI0~1V0Ie83Ie84ie85GAPGAGEG1CNINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE44

.520.500u.480.460.440.420a.400:jjJvI~~II~I~IIfI,'I'ti:II)IjjIIIIII~I~~Ij~~I,j~-.08I~-.06IIj-.04III-.02*~I0+.02I~Ijl-.20I'o~tt)VHPIlqCqHI~II~I~j~I;I~~II~IIII~~HROAII~I~I~~~~~'0~r0II0v4r01e83ooaorvOtV~~vr0r000V~I0r\0rrl<<vriot'ruvrv+a+000vII0vIirI01r00r0Ie84.V000wri4<<<a<000V~l1~IIe85GAPGAGEGIDNINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE45

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.480V.460IN.420.400\IhI~~hrI~EEEII~~EhII-.06-.04-.020+.02INaPqo~0)VHP4fqO~~EI~~I~I~I~~~~I~EIIh~~Ih~~I'EE~~EJII~~II~~rh~Eri0aP'IVxPp~iuvupPgPPPP~rgPP~IhhiVIWVVVPPPVP~VJ<IrhIe83Ie84Ie85GAPGAGEGV-ININEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE55

INSETAPI4ySI-6IIIIIIIII~IUIII.IIIIl~I~4Illyl~~l~SI-6IEX-40IeIISI10sl-6ySI-S~PI50LANTN0CCTN20oOFEETLA/I'ETAXCSHAFTIcccscTA)<<cattaeo0'ltaattlace(ah0IV7Alt'0IIADNASTE STIIUCTUIIC PLANTNONTH0~00~00cttTIDo(IN(ACDtlcHlSTIIUCTUAC wlaa(aaltat(eaat( 1eeetlh/(eetr~NORVALSAULTPF)/l/gly~aaa(SI2~0EXIPI2WESTBENCHSIIIEX-2pSI-43++PI-30Exe3EL.ZS2CI)+~IgV.+EEX-50pEX-6+Sl7SI-I'4+>>~~EL.220'ASTBENCHUNITIUNIT'EIIC*CTOII +CONTAINNENT(IN$ETI)(00aeatTorteIT0haTCFCEFOLDJAMESAFITZPATRICK NUCLEARPOWERPLANTNINEIIILEPOINTNIICLT.AR CENERATINO STATIONINSETBetaa(aearl~LANTNOIITNcIICOOLINSTONE(cFAULT0ADTCASTCFAULT~aecekareaa eahe~TreatTeteeoc~0aaeaaTITete(e~$21NEX2~aoacaaaaaoorutEXPLANATIONC 5INCLINOMETERLOCATIONTRENCNS(INSETC)I2$eeet0aeeTa~(elHEXII20PI20EX20estXl+SI.22~PI-EIEXTENSOMETER LOCATIONPIEZOMETERLOCATIONPlOTPLANOFINSTRUMENTATl0NATNINEMILEPOINTUNIT2NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP0X2d39D~ 0:,II'~lEL)WII;,.IIcej~-Ig~lre')g~I(.J ~J.'PI~IExtensions addedIV~~IIIZIEVATION020261.0'227.0'.010t010'-.020~~~-~....i227.0'213.0'.0213.0'196.0'--.020010~IPI~~~~~0.020~~-~~~--~---'-:----t ~-'-----.-------3196.0'172.0'.010~=~~~=~=~~~~~~~~=-~~~I~-~P~0-.010J*~272.0'230.0'P~g0130-0'97.0'~'~~~t'4MRre~g010"0~-~~I'261.0'97.0'Total) TI~ERmmCA&9V00v\0V000u0v400]iVzoxo0o0o00IeMVi00P70oWuU0XV0554ID00Ie83~IvU0V000UXoaO0P0oie920000Vg400OV000PP0U0OI~PO000D0IUlOPV0D00I0V0v0oIo>e.85EXTENSOMETER EX-1~NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP,o3QQoia3w

ieslT'Lag'/s~II' cunExtensions addedIELEVATION .0200-.020rt235-0'223.0'0200-.020~II223.0'296.0'I*~K.\I0200I020...~I~~'-"=----IIIII~.~~=-~296.0'2?2.0'200v)-.020u.020-.030~'-~I~~~r~~272.Q'23Q.Q'.040-.050I~~K~I~~~~>>~020.0200-.020k230.0'220.0'AvQQgge0~Alp4jgggge ~@.020~.~~~rtj'Ff.APERYURjE CARD.02Q0-.020tr220.0'73.0'oK0K0K000uov0ZOhZKIhh00ZOIeBO0Z00K0000\Zhh\00uz0a0~z0h>u0z0hz01hh000zD}g00~0zK000000~z000000tzZ0Zhhh00Z0~ZKZ39833e>MEXTENSOHETER EX-2NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP. 4.E~lCQp'5p'C~lg Q0~-~,IIII~-IIII,I~=-"I11II~~".I'IIIlnf5I<<hfIVMhhf'<<IH0~I'<<If<<1I'Ill<<'100'I@IS'00~1'IhfI<<II'IH'00f'llf<<'01I'<<If010Ilh100I~IS000>I~Ilhl'<<rlI'IHfi5III'I5.III-IfI1.IllVH'0I~<<II'0)01lv~10'I<<IS0<<IIHI1<<h~'f<<~<<f'<<IH0II<<If010'I00'Ih)$'0011<<nr~IM'hf<<<<Ih*01'I'0ll.,0IQQQQQQ~~QQQQQQQQQQQQIIISZflDffIEXTENSONETER EX-2NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWK'OWERCORP.FIGURE348 l ELFVATZON .080.070.060.050.040.030IIII.020.0200-.020t~'Ij'..i~~r~I:~II235.0'23.0'020 .0200I~rII*-I223.0'296.0'.020-.020~I=-~0200-.020'I~~296.0'272.0'0.0~~t-~~~~~0-.020~-~<<~~~~~~-~-==---t-~-230:0'.020-.030~-~.=~~---I~~4~.I-~-~t-*-~.I-~=-~~kvdi45)60k~+PgGIg'-.050-.060-.070-.080t~i~~.~I~~-~-~.~A~i~"~-=-<<~TSAPERVVmCAM-.090-.200-.220z~4040g+4000400Z0qZ4I44440Z0Iesorz044rz4QI4a<0004oz4z4o444zoIe81zop44zo04414Ov4~,'4404401ez44444z4Ie82~roz444~'0~r44e00040z4z'e0440z4Ie83z444rzJ0400z4zIe54EXTENSOItIETER EX-3NINEMILEPOINTNUCLEARSTATIOtIIUNIT2NIAGARAMOHAWKPOWERCORP. fi(TI,N*itii'lii OO0k(tqOOOO(:sl;1,~~1ei':.1.Ill,'4s~'j'~)IIiijII:l'f.(i'I:;is,IJ'.~IlI)ilsi,ll!s(a)1iiiI";-iI~i1s'(e~(~-il'i~~e)I(i.lliiif1f.,ll~J4jf,'.'II)I!Is1~giiI(ell(1l'I"iliel1i~~1(I.1a~.II1ilI.I,s~1(iIsa1i~~gr~lI',!:'1e,Ill.i.~)i.f1~;s",~I!s~alalIs,'~sfilj~ils!1~eli~~fe"'iegi',llI,*lies)e~ilili(~~L'Isieas~1~IiI.'i.l:Iel~1il'e*,:1~<<l1~Ii'~Qia)fl~(jI11illI[III!els~~~alel~e'()f~i1ie~~li:.j::l!I~ll~ee~~isieill~:OhTA1(ir)N(lrATHOAT~TH~lgNT('010Aoea100~a)5'OhrAlesr)NhrSTH'TOT'5TH')I'eeTa'PlCOI~e(i:lI1Iiis)asisiseasI(l"'j:Iellea~sl1)tllia'(g~Iee(,sl~eels~~e~1~~iIfe1I'ti~e~~leise~~(al~Ie,l~I~g1IiIIffI'.;I;e~~,(i~~ese1,A.(ei::ll1IIi~I:(iej'fi'.Il:'I':;I;;~efajjejesle~~~~~F1~~ee~~a(a~lifr",filae~i.ai,~iII~1e':lli(Ilr)aI(Il.~iiliiilmis'010AON'))01~)5'O(1Tg1(ir)NnrATHOATNTH0)gNsreli,l:;Iaeiias~f~a~eisl,iI~jlI'ls~~(1~1~)s~:l!jfielllIe>>i~i(I(I'i~leljleIIIil,'l(IljIf!.I;:'illfjI'ljllc(f(e~':l.'If~slllsI;i'IsjlIlfIl:fsIlfjliI'li'iflilI,e~1~!jjII'ia~la~f~1el,'i):I"'I'~le~Nt1~)ise\sI~is,la~Is~tI;Iii~iIslii(!isf,Ie~.1;IsIl11I.Oleil~;i(iie:sagii~I)i;.~.i~11~~I~ls~IjIiia~11efilie~l',;Ii.,'(ll'.,'!li:l:.'1alii~i~)))I)e'eIa1),eif(I':jfIi1e1eeli;lf'((ajl,e~010AONi)0)41~'OhT1'i(sr1N(ss'TH~JTNTH~)1searIraIII"',f.aeI~Ii)f4il~~ela)ilseIaI'II:.)~ilfalIjse~a).(iIi'fale,~~~I,'~e~1II~1~a~~1e~ailI~~i~i,~iaigi1s,1',I.~~~e(1~'f(~I;~;l.sIaals~1iiie'lii)I~~,I',~i~~glI',els,1al;If!eis11',il(jIf,'lfjg",II1seaI~ai~e~~~e~~1')~,ea'~ies~~f(sag~fse1~1sa!I;e~le~,(1~:fj:e0)0Aoas'100)415Ohr)1(ai'N(sr A'seaNari(TH~))Nas'aCXl8I,s".iI~~lf'Ill~lillillji'illIilfIflfI,',,II\~e~(i~e(lfsl~l~,iI'1~I(~s.ill'O)0AON)00OOOOOOOO~~~OOOOOOOOCqOO~~ISZffDNZEXTENSOMETER EX-3NINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE358

7ELEVATEON .260.150.140~230.120.110.200.090.080.070.060.050.040.0300200).0200-.020-.020-.030-.040-.050-.060-.070-.OSO-.090-.100-.110-.1207C~~~~~~-~CI~\C~~~I~I235.0'72.0'Tota2) ~AvaJahle~Qmggpggyp'PERTURE CARDIe80Ie810DV7VaC00000VQVa'700000000h1aIa'\a007070~Iaaa0000000007r0a7CCC(a00000V00aiv0D00>e.82Ie83Ie83000077VDa7CCa700000V0aIa'7acc0000000>IJ0070V0EXTENSOMETER EX-3..NINEMILEPOINTNUCLEARSTATION\UNIT2NIAGARAMOHAWKPOWERCORP. Iij~'g1tjff,'l+rjWj1fJ~CyI7plieC DZPTH-II~2020)~~~I0-20'150-20'~=*-.--I~~--=~~~~0I(......'..,'.....t: ':::I20'40'-~~~-/~~.~I~.~l~:-5i~~~~l~o40'60'0(~~~~~~i.-~60'222I=~-~~~-i~~~~~~~--30I5i~222'250I5~~~i0~~~~~~0-250'>0100e>2v01V>00D2vSSS20000~)02osv1~1swss02oV~2002's>vus>u 020u01s1)20ss020Vseu>20>1'u s00000v1e1st<s02DIe.8.4i02S>2r0Vs1ie85EXTENSOMETER HEX-ITHERMISTER IININEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWERCORP.FIGURE40B5@~p'503K) giIEig'1'41g>eplII de9SOZDCpII.le~0-00QaotMZCVZPESPIALHOPZS3HDNZNISN3H3hOH3h?SFI381I.IIIIII~~iII~IOQOlAS3HDNIHZ9NIQV3d39It'9VVI'8I-~~J~~~~I~-~EOCtlIttt'nrIn.nitOll0lolS00000OhrIlnrlmrntrOll010lS0wnvIlnr~4neerAhse+~~iOll'S'IOItinTL~jERTUBCAK%'APGAGEG3SHEARNINEMILEPOINTNUCLEARSTATIONUNIT2NIAGARAMOHAWKPOWER~C~I%&FDgdaiZ ~ l\4~tI'$ltI,%l\}}

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