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| issue date = 02/09/1987
| issue date = 02/09/1987
| title = Forwards Addl Info for 860702 Application for Amend to License NPF-16 Re Spent Fuel Storage,Per 861210 Request. Shipping Cask Models NAC-1 & NLI-1/2 Only Casks That Meet 25 Ton Tech Spec Limit for Unit 1 Cask Crane
| title = Forwards Addl Info for 860702 Application for Amend to License NPF-16 Re Spent Fuel Storage,Per 861210 Request. Shipping Cask Models NAC-1 & NLI-1/2 Only Casks That Meet 25 Ton Tech Spec Limit for Unit 1 Cask Crane
| author name = WOODY C O
| author name = Woody C
| author affiliation = FLORIDA POWER & LIGHT CO.
| author affiliation = FLORIDA POWER & LIGHT CO.
| addressee name =  
| addressee name =  
Line 13: Line 13:
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 22
| page count = 22
| project =
| stage = Request
}}
}}


=Text=
=Text=
{{#Wiki_filter:ACCESSION NBR:FACIL:50-33550-389AUTH.NAI'IEWOODY~C.O.RECIP.NAI'IEREGULATORY'ORI"IATION DISTRIBUTION BYR~EI'I(RIDS)8702180096 DQC..DATE.'7/02/09 NOT*RID:NOSt.LuciePlantiUnitiiFloridaPowerCcLightCo.St.LuciePlantiUnit2>FloridaPower5LightCo.AUTHORAFFILIATION FloridaPowerSrLightCo.RECIPIENT AFFILIATION DocumentControlBranch(Document-'ontrol Desk)DOCKET0500033505000389
{{#Wiki_filter:REGULATORY'ORI"IATION DISTRIBUTION BYR~EI'I (R IDS)
ACCESSION NBR: 8702180096         DQC..DATE.'7/02/09 NOT*RI D: NO              DOCKET FAC IL: 50-335    St. Lucie Planti Unit ii Florida Power Cc Light Co.         05000335 50-389 St. Lucie Planti Unit 2> Florida Power 5 Light Co.            05000389 AUTH. NAI'IE          AUTHOR AFFILIATION WOODY~ C. O.           Florida Power Sr Light Co.
REC IP. NAI'IE        RECIPIENT AFFILIATION Document Control Branch (Document-'ontrol Desk)


==SUBJECT:==
==SUBJECT:==
Forwardsaddiinfofor860702applicati onforamendtoLicenseNPF-16respentfuelstorage>per861210request.ShippingcaskI'IodelsNAC-15NLI-1/2onlycasksthatmeet25tonTechSpeclimitforUnit1caskcrane.DISTRIBUTION CODE:A001DCOPIEBRECEIVED:
Forwards addi info for 860702 applicati on for amend to License NPF-16 re spent fuel storage> per 861210 request.
LTRiENCLIBIZE:TITLE:QRSubmittal:
Shipping cask I'Iodels NAC-1 5 NLI-1/2 only casks that meet 25 TITLE:
GeneralDistribution NOTES:RECIPIENT IDCODE/NAI'IE PWR-BEBPWR-BFOBPWR-BPD8PD04PIJR-BPEICSBINTERNAL:ADI'I/LFI'IB NHFT/TSCBREQFI01COPIESLTTRENCL115510111RECIPIENT IDCODE/NANE PWR-BPElCSBPWR-BPD8LATOURIGNY>EPWR-BRSBELD/HDS2NRR/ORASCOPIESLTTRENCL2201111010EXTERNAL:
NOTES:
EGMBRUSKEiSNRCPDR02111LPDRNSIC0305,1111TOTALNUj'IBEROFCOPIESREQUIRED:
QR ton Tech Spec limit for Unit 1 cask crane.
LTTR22ENCL18 lit1vls8hliriP'llt1,,1'tt~t)rtt*~~ttjgitttgtft'tettltt".3f'".":)
DISTRIBUTION CODE: A001D        COPIEB RECEIVED: LTR Submittal: General Distribution i    ENCL  I BI ZE:
9$g4l~tttttttt"IttiII*l?it~t P.o.B000,JUNOBEACH,FL33408.0420
RECIPIENT         COPIES          RECIPIENT          COP IES ID CODE/NAI'IE     LTTR ENCL      ID CODE/NANE      LTTR ENCL PWR-B    EB                        PWR-B PEl CSB          2    2 PWR-B    FOB            1    1    PWR-B PD8 LA                0 PWR-B    PD8 PD 04      5    5    TOUR IGNY> E          1    1 PI JR-B  PEICSB              1    PWR-B RSB              1 INTER NAL: ADI'I/LFI'IB                   0    ELD/HDS2              1    0 N      HFT/TSCB        1    1    NRR/ORAS              1    0 REQ  FI        01          1 EXTERNAL: EGM BRUSKEi S                  1    LPDR            03    1    1 NRC PDR          02    1    1    NSIC            05,   1    1 TOTAL NUj'IBER OF COPIES REQUIRED:     LTTR  22  ENCL    18
~ygllhy~FEBRUARY91987L-87-48U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Gentlemen:Re:St.LucieUnitsIand2DocketNos.50-335and50-389SentFuelTransferByletterL-86-250, datedJuly2,l986,FloridaPower&LightCompany(FPL)proposedtoamendtheSt.LucieUnit2operating licenseNPF-l6toestablish theoptionofstoringspentfuelfromSt.LucieUnitIintheSt.LucieUnit2spentfuelpool.TheUnitIspentfuelpoolwilllosefullcorereservecapacityasaresultofthel987refueling outage,andtheplannedUnitIspentfuelpoolrerackcannotbeaccomplished priortol988.If,intheinterim,fullcoreoff-loadofUnitIshouldbenecessary, UnitIspentfuelcouldbestoredintheUnit2spentfuelpool.ByletterdatedDecemberIO,I986(E.G.TourignytoC.O.Woody)theNRCStaffrequested additional information requiredtocontinuetheirreviewofthisproposedlicenseamendment.
 
AttachedisFPL'sresponsetothisrequest.lfadditional information isrequiredonthistopic,pleasecontactus.Very,truly yours,C.O.WGroup'President NuclearEnergyCOW/EJW/gpAttachment cc:Dr.J.NelsonGrace,RegionII,USNRCUSNRCResidentInspector, St.LuciePlant8702i80096 870209PDRADOCK05000335pPDR.UMoolEJW4/00I/IanFPLGroupcompany I~Mh&rrr~".~Ill',~~Ii>>i.;,~~MI'--hII4-~0<<dil<<44-'IcIriII',<<~4->>rf>>II'Ii'>>m4'Iill,,4J>>r~~",<<I~rII>><<>><<'<<~llmk.
lit                            1 ls v
~<<.I<<4~>>i>>44'-'I"~4li.-'>>~4->>'4l~44~M=I'4*'')(42~.-y<<I~I~I"'Ir~<<h'Irrr4>>,ff<<,I,<<4h>>,4hr<<II4'.MI>>IIhl4-ii.444~",I,M,'..4ilt~>>>>'rit.i-filiIitfi4,~~'IPI.<<4<44.'Mg"II'Mr444IU4fii>>,',F44~I.*<<f(IifI>><<lt4'ilI>>=4.>>Ii'I~I"IIIf1iik<<.IM4\"'hii~',IIll>><<III.lhI'1"'I".i,4<<,',,"<<ilkii'~'.''4l",frl>>r,hl>>ri<<h<<<<
8 h li i  'll P
.~ll4I'Ill4~$<<hri,i44>>+w>>4<<IM)QV4~Mh<<r'4~IM-~ll<<r3IPrh'Ofi4I>>'l4I.>>rlll~r~i'IrI',IrI~<<v<<rIl ATTACHMENT REQUESTFORADDITIONAL INFORMATION FLORIDAPOWER8LIGHTCOMPANYST.LUCIEUNITSIAND2SPENTFUELTRANSFERBETWEENUNITSPLANT,ELECTRICAL, INSTRUMENTATION ANDCONTROLSYSTEMSBRANCHInyoursubmittal datedJuly2,l986,youproposedalicensing amendment toestablish theoptionoftransferring andstoringspentfuelassemblies (SFAs)fromtheSt.LucieUnitIspentfuelpool(SFP)totheSt.LucieUnit2SFPinordertopermitfullcoreoff-loadcapability atUnitI,shoulditberequired, duetolossofUnitIfullcorereservestoragecapacityfollowing thel987refueling outage.Providethefollowing additional information withrespecttothisproposal:
r                                                                                      t 1
I.Providefurtherdetailsregarding theUnitISFAstobestoredintheUnit2SFP.Thedetailsshouldincludenumber,typeandageofexistingSFAstobetransferred toUnit2andtheSFAlocations intheUnit2storagerackstobeutilized.
        ,,1't  t~t                 ~       ~ t                                t'
Alsoprovideanynecessary drawingstoclarifyyourresponse.
                ) r t t*    t jgit  t  tg t
~ResonseTheSt.LucieUnitIspentfuelassemblies whichwouldbeconsidered initially forstorageintheSt.LucieUnit2spentfuelpoolwouldbethosethathavehadthelongestdecaytimeintheUnitIspentfuelpool,i.e.BatchA,Combustion Engineering assemblies whichwereoffloadedfromtheUnitIcoreduringUnitIsfirstrefueling outageinApril-May l978,andhaveremainedinthespentfuelpoolsincethatoffload.RefertoSt.LucieUnitIUpdatedFinalSafetyAnalysisReport(FSAR)Table4.2-landFigure4.2-3.Althoughtheproposedamendment wouldnotlimitthenumberofSFAsthatcouldbetransferred totheUnit2SFP,itisexpectedthatonlyl5to25SFAswouldbesubjecttotransfer, shouldthisoptionbecomenescessary.
f tet tl tt
FigureI-IshowstheUnitIspentfuelpoolwiththeBatchAassemblies indicated.
      ".3f'".":)9                             ~ t t t tt            t"
FigureI-2showstheUnit2spentfuelpool.TheUnitIassemblies wouldbeputintotheindicated rackpositions closesttothecasklaydownarea,shouldthetransferbenecessary.
            $ g4 l                                                        t t I
Thiswouldbeconsistent withtherequirements ofSt.LucieUnit2Technical Specification 5.6.l.2.ConfirmthatyouwillhandlenomorethanoneSFAatagiventimeinashippingcask,andthatonlyonetypeofshippingcaskwillbeused.~ResonseAtthistime,shippingcaskModelNos.NAC-IandNLI-I/2aretheonlycasksthatmeetthe25tonTechnical Specification 3.9.I3limitfor.theUnitIcaskcrane.BoththeNAC-IandNLI-I/2casksarecapableofholdingonlyonePWRfuelassembly.
t ti II l? i
Therefore, handlingmorethanoneSFAinacaskisprevented bythedesignofthesecasks.EJW4/00I/2 fiI~lvtvfit-v'00k40rtl(kl~0'4"II*v&vII-ltVI.Il,.vvltiv"l44040itf,l''l4'vI,I,4I0'Ifl4',f,0I,00~400'ttthfl0'I00~..40ii4*4~',vl,I4~44Iv-"44'Itf4~~ill"I0viVvtII~~~4I0'0llllflWV,r"S-'4~v00ft004flIIr4.~4If00ItIVV'l000~I~4104040f44000IIlO''I4It(tIIIfvI00tlI'III~Iv04fv..l44IV~j'll~gfttt4slI 3eProvideasummaryoftheevaluation performed concerning theshippingcaskloadpathbetweentheunits.Thissummaryshouldincludeadiscussion ofthemeansutilizedtoconfirmthatsafetyrelatedequipment including piping,components, andelectricconduitsthatarelocatedneartheloadpathandthosethatareburiedundertheloadpathwillnotbeadversely affectedwithregardtotheircapability toperformtheirintendedsafetyfunctions duringnormalspentfueltransferfromUnitItoUnit2andintheeventofanaccidentsuchascaskdrop.Also,provideanynecessary drawingstoclarifyyourresponse.
* t~
~ResenseTheevaluation considered aspentfueltrans-shipment pathstartingattheUnitIcaskloadingareaandtraveling totheUnit2caskloadingareaasindicated inFigure3-l.Thispath,initsentirety, coincides withaportionoftheintermodal casktransporter pathpreviously evaluated foreffectsuponunderground structures andutilities.
t
Thespentfueltrans-shipment pathroadsurfaceispavedwithPortlandcementconcreteorasphaltic concrete.
 
Thefuelelementstobetransported willutilizeaoneelementshippingcaskhavingamaximumweightof25tonswhenloadedwiththespentfuelassembly.
P. o. B    000, JUNO BEACH, FL 33408.0420
Twotransport vehicleswereconsidered intheevaluation.
                                                                                                          ~ygl lhy~
WheelloadsforthetwovehiclesareshowninFigures3-Iand3-2.Thereactions ofthetwotransport vehicleswerecomparedtothemaximumreactions oftheintermodal casktransporter thatwaspreviously evaluated.
FEBRUARY      9 1987 L-87-48 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Gent lemen:
Sincethereactions oftheintermodal casktransporter aregreaterthanthereactionforeitherofthetwotransport
Re:   St. Lucie Units I and 2 Docket Nos. 50-335 and 50-389 S ent Fuel Transfer By letter L-86-250, dated July 2, l986, Florida Power & Light Company (FPL) proposed to amend the St. Lucie Unit 2 operating license NPF-l6 to establish the option of storing spent fuel from St. Lucie Unit I in the St. Lucie Unit 2 spent fuel pool. The Unit I spent fuel pool will lose full core reserve capacity as a result of the l987 refueling outage, and the planned Unit I spent fuel pool rerack cannot be accomplished prior to l988. If, in the interim, full core off-load of Unit I should be necessary, Unit I spent fuel could be stored in the Unit 2 spent fuel pool.
: vehicles, theintermodal casktransporter evaluation isconsidered tobeanenveloping evaluation.
By letter dated December IO, I 986 (E. G. Tourigny to C. O. Woody) the NRC Staff requested additional information required to continue their review of this proposed license amendment. Attached is FPL's response to this request.
Theeffectoftheintermodal casktransporter wheelloads(andthusthespentfueltransporter wheelloads)ontheroadway,missileprotection slabsandunderground facilities (i.e.,pipes,electrical conduit,manholesandcatchbasins)hasbeenanalyzed.
lf additional information is required on this topic, please contact us.
Thepunchingshearoftheconcreteroadwayisacceptable forsurfaceareasofbothsingleanddualtirewheels.Eachsurfaceareawasalsoevaluated formaximumsoilbearingcapacityandfoundtobeacceptable.
Very,truly yours, C. O. W Group        President Nuclear Energy COW/E JW/gp Attachment cc:   Dr. J. Nelson Grace, Region II, USNRC USNRC Resident Inspector, St. Lucie Plant ool 8702i80096 87020905000335 PDR    ADOCK p                      PDR
Themaximumstressesanddeflections ofthemissileprotection slabs,underground pipesandconduitarewithintheallowable range.Theultimatestrengthdesignofthemanholesandcatchbasinsusingtheappropriate loadcriteriawasreviewedandfoundtobeacceptable.
                            . U M
Theroadwaywillbeinspected forgeneraldeterioration sothatitcanberepaired, ifnecessary, priortothetransport ofspentfuel.Theshippingcaskwillbeadequately securedtothetransport vehicle.Thepossibility ofacaskdrophasbeengreatlyminimized bythefollowing:
E JW4/00 I /I                                                                       an FPL Group company
a.conservative designmarginsintheliftingcomponents b.redundant brakingsystemsforhoistsystemsc.periodictestsandinspections ofthecranesEJW4/001/3 4h,t4I4If4Ut4~~III~4I'Ut444IUII4IhI~~I,"4II,4llN~N~*ttt4III~4IUll,f,tII4I4I4III444II4, d.useofqualified craneoperators andriggerse.theuseofapprovedoperating andadministrative procedures RefertoFPLresponsetoQuestionNo.8foradiscussion ofacaskdropaccidentinthecasklaydownareaofeitherunit.4.Providethedetailsofthespentfuelshippingcaskandverifythatitmeetstherequirements of10CFRPart71.~ResonseForanytransferoffuelbetweenSt.LucieUnitsIand2priortocompletion ofthererackoftheUnitIfuelstoragepool,thespecificcasktypewillbeeithertheModelNo.NAC-IortheModelNLI-I/2series.Pursuantto10CFR71.12,FPLwillregistertheNAC-IcaskwiththeNRCpriortoitsuse.TheNRChasissuedCertificate ofCompliance No.9183,RevisionNo.3datedNovember14,1984forthiscaskwhichstatesthattheNAC-Iisapprovedforuseunderthegenerallicenseprovisions of10CFRPart71.12.TheNLI-I/2caskiscurrently registered forusebyFPL.TheNRChasissuedCertificate ofCompliance No.9010,RevisionNo.16,datedJanuary16,1986forthiscaskwhichstatesthattheNLI-I/2isapprovedforuseunderthegenerallicenseprovisions of10CFRPart71.12.5.According tothetechnical specification forSt.LucieUnitI,thespentfuelstoragecaskcanbemovedintothespentfuelstoragepoolareawhenthespentfuelinthepoolhasagedmorethan1190or1490hours,depending ontheamountofspentfuelinthepool.Thetechnical specifications alsoallownewspentfueltobemovedintothespentfuelstorageareaafterthereactorhasbeenshutdownfor72hours.However,thereisnobasisprovidedfortheminimumshutdowntimethatwouldberequiredifnewspentfuelweretransferred byashippingcasktotheSt.LucieUnit2SFP.Therefore, provideananalysisfortheminimumshutdowntimethatwouldberequiredforapostulated designbasiscaskdropaccidentoccurring outdoorsbetweenUnitsIand2andconfirmthattheresulting off-sitedosesarelessthan10%ofthe10CFRPart100guideline dosevalues.~ResonseSection9.1.4.3.e oftheUnitIFSARprovidesananalysisofthepotential offsitedoseresulting fromthedroppingofacaskcontaining tenspentfuelassemblies outsidethefuelhandlingbuildingunderadversemeteorological dilutionconditions.
 
Thisanalysisassumesnotonlytenassemblies, butalsoaminimumdecayof90days.BecausetheBatchAassemblies havedecayedinexcessofeightyearsandonlyoneSFAwillbetransferred atatimeasdiscussed intheresponsetoQuestion2,theabovereferenced analysisisbounding.
I
Therefore, noadditional analysisisnecessary.
                                                                                                                                                                                                              ~         Mh&         rr r        ~ ".   ~
EJW4/001/4  
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.~4<<lliv<<A(4UI4'U'itttiIl.4'>>4~4I(.I',I'II4~AU"~>>'>>Ill'IJ.IIrf/liv)4,/44,'k.'U>lc'4.)Qf.f<<Ur~4/.Pt>I'UAh'tIA-llIUt/i4kil>>~44ll'I/',,/llr'/tfv/<<~>>.:,(Ill/Vk~lt'I/I4>>i<<+Ititk4A4I'UgrU>>J,,;I~,'4'>>Ilt>>itIil/>>g~A,4>>->>&4I4ilitl~>>I4I4A"I~IIIi~4i>>U-UC/i>>IU-II'II4Ii4foil'I~4~It4>>vIilA~.4.4>>.~It~toll>>>>4"I'>>k>>~>>lv--"Lf('IU'I~<<~U>>rWilhII.UC~UI4.'k)UU'lCI'C""t4U~~'.lii~rr~.,ilLI~itAkr',.C>>ti.I<<LUVt/rll4li>>UVD<<~ILIlllri'v<<vk~IAlilIIItlAIl-r/I'Ufl".kt4I4,ll>>v4/<<>>U~44L,Ll>>I<<VI>>r4c.4vi/t'>>444I'.ii444IL1~'I44ilIUCUCU~Ir.14UII~I>ltIvIIil4~I>>.li>>Ik4I~~~:>>II4UUI>>I4~UV<<>>I'W>>~*U/C'4~>>>>~.~,~444Arv4IICQC/~k'\>>k4~4'UU.VillIIC~Ik~At~k4t(4p4I,'Ilk..'If'"AC~4'I4*~4CktCI~"4AilA4A-I<<V~44UI'I~II>>.'iI/~VvvCI'I'4I~4k~<<4~tlI~;,/",,Uit',II,,I'>>>>>./>>VIt4~C>>4,/'II~I~,'Iv>>
                                                                                                                                                                                            ~           ~                               I i>>i       .;, ~
6.Provideadescription ofthedoserateatthesurfaceofthepoolwaterforbothUnitsIand2fromthefuelassemblies, controlrods,burnablepoisonrodsoranymiscellaneous materials storedinthepool.Also,providethedoseratefromindividual fuelassemblies astheyarebeingtransferred tothecask,andspecifythedepthofwatershielding thefuelassemblies astheyarebeingtransferred.
                                                                                                                                                                                                                    ~   MI'--                   h  II4  - ~
Ifthedepthofwatershielding overafuelassemblyduringtransferislessthanIOfeet,orthedoserate3feetabovetheSFPwaterisgreaterthan5mR/hraboveambientradiation levels,thenproposeatechnical specification specifying theminimumdepthofwatershielding tobemaintained overthefuelassemblyasitisbeingtransferred inorder'tomaintainALARAlimits,andidentifythemeasurestakentoassurethatthisminimumdepthwillbemaintained.
0<<
~ResonseTravelstopsinthefuelhandlingequipment forbothunitslimitthetraveltorestrictwithdrawal ofthespentfuelassemblies.
di  l II
Thislimitation, togetherwithwaterlevelcontrol,resultsinthemaintenance ofaminimumwatercoverof9ft.overtheactiveportionofthefuelassembly, resulting inaradiation levelof2.5mR/hrorlessatthesurfaceofthewater(seeSt.LucieUnitIFSARSection9.I.4.3andSt.LucieUnit2FSARSection9.I.4.3.3).
          <<44     -
Notethatifthetravelstopsshouldfailandtherewerenooperatoraction,thefuelhandlingmachinecannotraisetheassemblyabovea9ft.water-to-active-fuel-length heightbecauseofthespentfuelmachinedesigngeometry.
          >><<>><<'<<~llmk.
RefertoFPLresponsetoQuestion7foradiscussion onmaintaining ALARAlimitsduringfuelassemblytransfer.
                      'Ic      Iri  I  I',               <<
FPL'sALARAprogram,coupledwithdesigngeometry, interlocks andlimitswitchesobviatetheneedforadditional fueltransferTechnical Specifications.
                                                            ~
7.a.Describethemannerinwhichoccupational exposurewillbekeptALARAduringthetransfer, including theneedforandthemannerinwhichcleaningofthecrudonSFPwallswillbeperformed toreduceexposures ratesintheSFParea.Also,describethemeanstobeutilizedtoensurethatdosestodiversaremaintained ALARA.b.Describethemannerinwhichoccupational exposurewillbekeptALARAduringcleanupoperations aftercompletion ofthespentfueltransfer.
                                                                ~
~Resonsea.Duringthepostulated fueltransfer, occupational exposures willbelimitedbyALARAprocedures andguidelines whichcurrently existatSt.Lucie.Additionally, experience gainedfrompreviousfuelmovementoperations andthethermalshieldremovalfromUnitIwillbeusedinkeepingexposures ALARA.FPLletterL-86-458, datedNovemberl4,I986describes FPL'sALARAprogramandpersonnel exposureexperiences.
                                                                <<.I<<4 - >>rf>>
CrudontheSFPwallsforeitherunitpresentsaninsignificant contribution toexposureatSt.Lucie.Diverswouldnotbeusedintransferring spentfuelbetweentheunits.EJW4/00I/5 U14II,tt~ItIll~1wdttNI'lI~14F~IIIIItf4I4it"4Ill4I4ItttAif4i'dtttt~t'N,<<Utfd14Ud1It4I4~I;144ll4*~~44'1It,>.I,II,NII):filIlIUI4"'1~I'W)I~IUdIIII,/UtII/I441'I~IOUI4tlt~IiitiAldkII44IllitlmttI4Uk.If~t,~ItAIlkttOIIAI~Utkid,I44IUt,.1,tfIO4ttILW,AIW-U4ltItI'.'i'INt14ttt,ItWttUlttt4It'4UIt>>tttI4ttltII4IUO44AI4I1<<IIItUUIt~II.OftUU\1 b.Asdiscussed initema.,above,occupational exposurefromcleanupoperations whichwouldresultfromthepostulated fueltransferwillbelimitedtoALARAbyprocedures andguidelines whichcurrently existatSt.Lucie.8.DiscusstheextentofdamagethattheSFPmayincurfromadroppedspentfuelshippingcask,andconfirmthatsufficient boratedmake-upwaterisavailable'o maintaintheminimumSFPwaterlevelforanyresulting leakage.~ResonseSection9.I.4.3oftheUnitIFSARpostulates twocaskdropaccidents fortheUnitISFP,averticalandatippedcaskdrop.Theverticalcaskdropintothecaskstorageareahasbeenanalyzedtodetermine iftheleaktight barrierofthepoolcanbebreached.
                                                                                ~  >>i>>44' II 'Ii '>>m        4
Theresultsoftheanalysisindicatethattheleaktight integrity ismaintained fora25toncaskdrop.Technical Specification 3/4.9.I3,"SpentFuelCaskCrane,"providesassurance thattheUnitIfuelcaskcranedoesnothandleloadsinexcessof25tons.Atippedcaskdrophasalsobeenconsidered andtheanalysisresultsfoundtobeacceptable.
                                                                                                            -'I I ill,,
IntheUnit2spentfuelpoolaconcretewalltothetopoftheSFPseparates thecaskstorageareafromthespentfuelstoragearea.Thewallpreventsawaterlevelreduction overthespentfuelassemblies evenifadroppedfuelcaskcausesdamagetothepoolorpoollinerinthecaskstoragearea.Forbothunits,thecaskisphysically prevented andadministratively prohibited fromtraveling overtheSFPoutsidethecaskstoragearea.9.Provideanevaluation ofthetotaldosetomembersofthepublicresulting fromtheproposedtransferconsidering thefollowing:
                                                                                                                              ~  4        li 4J>>r
a.timerequiredtomoveeachfuelassemblyfromtheUnitISFPtotheUnit2SFP;b.releasesofradioiodines andotherradionuclides duringthistime;c.directradiation; d.transferandcleanupoperations; ande.othersourcesofexposureatthesite.~ResonseTheonlydosetomembersofthepublicthatcouldpotentially occurwouldbeasaresultofafuelhandlingorcaskdropaccident.
                                                                                                                                                  .-'>> ~
Theseaccidents havebeenanalyzedintheUnitIFSARSections9.I.4.3andl5.4.3.2andintheUnit2FSARSectionsl5.7.4.I.2andI5.7.4.I.3.
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II.Yourrequestindicates thatspentfuelwillbetransferred onlyfromUnitItoUnit2.Confirmthatthisisthecase.Ifyourrequestalsoinvolvesthecapability totransferspentfuelfromUnit2toUnitI,provideinformation comparable tothatindicated previously forthiscase,orconfirmthattheconditions ofthetransferwillbeidentical tothatforUnitItoUnit2.~Resonselfafullcoreoff-loadisrequiredpriortoreracking theUnitISFP,onlyfueldischarged fromUnitIwillbetransferred toUnit2.Nofueldischarged fromUnit2willbetransferred toUnitI.However,afterreracking theUnitISFP,anyspentfuelfromUnitIwhichmayhavebeentransferred totheUnit2SFPcouldbereturnedtotheUnitISFPundertheconditions described above.EJW4/00I/7 flI4'1tIIIIbHIIIvIIIIII>>4'5 ggjttXIXOP7lfI1N8BatchAFuelAssemblies WithLongestContinuous DecayTimeKio1C1iS5JpAAAh88CCbbEEFFGGHHC,CLL2827262524232221201918171615141312II1098765432IlLFigure1-1SpentFuelStorageSt.LucieUnit1 4ltly't ST.LUCIE UNIT2OPERATLGPR'OCEDURE NO>>2-1600022, REVI~ON2UNITNO.2REPUELTNG OPERATION FIGURE6SPENTPUELSTORAGEFOLL(MING REFUELING ORERATION 1))Illan1III~'0I>>II+~p~4r~~57V~d~kuwX~SECTIONBSECTIONAIVIIVIIrIIrIIIIIIYlIIYlIIrlIIYIVYlIIIYlIIIIIkiIIrIlIIVIIIIIIIIIIIVlIIYlIIVYIIYIIIYlIIVIIIIIIIIVVIIVIIIIirIIIrIlIvIIIriIVVIIYVIYlIIIIIIIPIIi'PiIt'lIIVVlIIIIVlIYIVIVIIIIIIVIIIVIIIIIVIIIrtrIIIPIIIllIIIVIIiFigure1-2 Figure3~8H]P'GALGA9'KTICA~ORT~
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ATTACHMENT REQUEST FOR ADDITIONALINFORMATION FLORIDA POWER 8 LIGHT COMPANY ST. LUCIE UNITS I AND 2 SPENT FUEL TRANSFER BETWEEN UNITS PLANT, ELECTRICAL, INSTRUMENTATIONAND CONTROL SYSTEMS BRANCH In your    submittal dated July 2, l986, you proposed a licensing amendment to establish the option of transferring and storing spent fuel assemblies (SFAs) from the St. Lucie Unit I spent fuel pool (SFP) to the St. Lucie Unit 2 SFP in order to permit full core off-load capability at Unit I, should it be required, due to loss of Unit I full core reserve storage capacity following the l987 refueling outage.
Provide the following additional information with respect to this proposal:
I. Provide further details regarding the Unit I SFAs to be stored in the Unit 2 SFP. The details should include number, type and age of existing SFAs to be transferred to Unit 2 and the SFA locations in the Unit 2 storage racks to be utilized. Also provide any necessary drawings to clarify your response.
          ~Res  onse The St. Lucie Unit I spent fuel assemblies which would be considered initially for storage in the St. Lucie Unit 2 spent fuel pool would be those that have had the longest decay time in the Unit I spent fuel pool, i.e. Batch A, Combustion Engineering assemblies which were offloaded from the Unit I core during Unit I s first refueling outage in April-May l978, and have remained in the spent fuel pool since that offload. Refer to St. Lucie Unit I Updated Final Safety Analysis Report (FSAR) Table 4.2-l and Figure 4.2-3.
Although the proposed amendment would not limit the number of SFAs that could be transferred to the Unit 2 SFP, it is expected that only l5 to 25 SFAs would be subject to transfer, should this option become nescessary.
Figure I-I shows the Unit I spent fuel pool with the Batch A assemblies indicated.
Figure I-2 shows the Unit 2 spent fuel pool. The Unit I assemblies would be put into the indicated rack positions closest to the cask laydown area, should the transfer be necessary. This would be consistent with the requirements of St. Lucie Unit 2 Technical Specification 5.6.l.
: 2. Confirm that you will handle no more than one SFA at a given time in a shipping cask, and that only one type of shipping cask will be used.
          ~Res  onse At this time, shipping cask Model    Nos. NAC-I and NLI-I/2 are the only casks that meet the 25 ton  Technical  Specification 3.9. I3 limit for. the Unit I cask crane. Both the NAC-I  and NLI-I/2  casks are capable of holding only one PWR fuel assembly. Therefore, handling more than one SFA in a cask is prevented by the design of these casks.
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3e    Provide a summary of the evaluation performed concerning the shipping cask load path between the units. This summary should include a discussion of the means utilized to confirm that safety related equipment including piping, components, and electric conduits that are located near the load path and those that are buried under the load path will not be adversely affected with regard to their capability to perform their intended safety functions during normal spent fuel transfer from Unit I to Unit 2 and in the event of an accident such as cask drop. Also, provide any necessary drawings to clarify your response.
        ~Res ense The evaluation considered a spent fuel trans-shipment path starting at the Unit I cask loading area and traveling to the Unit 2 cask loading area as indicated in Figure 3-l. This path, in its entirety, coincides with a portion of the intermodal cask transporter path previously evaluated for effects upon underground structures and utilities. The spent fuel trans-shipment path road surface is paved with Portland cement concrete or asphaltic concrete.
The fuel elements to be transported will utilize a one element shipping cask having a maximum weight of 25 tons when loaded with the spent fuel assembly. Two transport vehicles were considered in the evaluation. Wheel loads for the two vehicles are shown in Figures 3-I and 3-2. The reactions of the two transport vehicles were compared to the maximum reactions of the intermodal cask transporter that was previously evaluated. Since the reactions of the intermodal cask transporter are greater than the reaction for either of the two transport vehicles, the intermodal cask transporter evaluation is considered to be an enveloping evaluation.
The effect of the intermodal cask transporter wheel loads (and thus the spent fuel transporter wheel loads) on the roadway, missile protection slabs and underground facilities (i.e., pipes, electrical conduit, manholes and catch basins) has been analyzed. The punching shear of the concrete roadway is acceptable for surface areas of both single and dual tire wheels. Each surface area was also evaluated for maximum soil bearing capacity and found to be acceptable.      The maximum stresses and deflections of the missile protection slabs, underground pipes and conduit are within the allowable range. The ultimate strength design of the manholes and catch basins using the appropriate load criteria was reviewed and found to be acceptable.
The roadway will be inspected for general deterioration so that it can be repaired, if necessary, prior to the transport of spent fuel. The shipping cask will be adequately secured to the transport vehicle.
The possibility of a cask drop has been greatly minimized by the following:
: a. conservative design margins in the    lifting components
: b. redundant braking systems    for hoist systems
: c. periodic tests and inspections of the cranes E JW4/001/3
 
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: d. use of qualified crane operators and riggers
: e. the use  of approved operating and administrative procedures Refer to FPL response to Question No. 8 for a discussion of a cask drop accident in the cask laydown area of either unit.
: 4. Provide the details of the spent fuel shipping cask and verify that  it meets the requirements of 10 CFR Part 71.
          ~Res onse For any transfer of fuel between St. Lucie Units I and 2 prior to completion of the rerack of the Unit I fuel storage pool, the specific cask type will be either the Model No. NAC-I or the Model NLI-I/2 series.
Pursuant to  10 CFR 71.12, FPL will register the NAC-I cask with the NRC prior to its use. The NRC has issued Certificate of Compliance No. 9183, Revision No. 3 dated November 14, 1984 for this cask which states that the NAC-I is approved for use under the general license provisions of 10 CFR Part 71.12.
The  NLI-I/2 cask is currently registered for use by FPL. The NRC has issued  Certificate of Compliance No. 9010, Revision No. 16, dated January 16, 1986 for this cask which states that the NLI-I/2 is approved for use under the general license provisions of 10 CFR Part 71.12.
: 5. According to the technical specification for St. Lucie Unit I, the spent fuel storage cask can be moved into the spent fuel storage pool area when the spent fuel in the pool has aged more than 1190 or 1490 hours, depending on the amount of spent fuel in the pool. The technical specifications also allow new spent fuel to be moved into the spent fuel storage area after the reactor has been shutdown for 72 hours. However, there is no basis provided for the minimum shutdown time that would be required if new spent fuel were transferred by a shipping cask to the St. Lucie Unit 2 SFP. Therefore, provide an analysis for the minimum shutdown time that would be required for a postulated design basis cask drop accident occurring outdoors between Units I and 2 and confirm that the resulting off-site doses are less than 10%
of the 10 CFR Part 100 guideline dose values.
          ~Res onse Section 9.1.4.3.e of the Unit I FSAR provides an analysis of the potential offsite dose resulting from the dropping of a cask containing ten spent fuel assemblies outside the fuel handling building under adverse meteorological dilution conditions. This analysis assumes not only ten assemblies, but also a minimum decay of 90 days. Because the Batch A assemblies have decayed in excess of eight years and only one SFA will be transferred at a time as discussed in the response to Question 2, the above referenced analysis is bounding. Therefore, no additional analysis is necessary.
E J W4/001/4
 
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                                                                                                                                                                                                                                                                                                                      <<A      (        4 UI                            4'              U    'it          tti          I        l    . 4'>>                    4                ~ 4 I
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il 4      ~                          I >>.       >>>>        ~
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(                                                          4                                                    4 ~                   tl  I    ~
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                                                                                                                                                                                                                    ~                                   k Uit'                                                 4,/
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                                                                                                                                                                                                          '  I  / ~ Vvv        C    I  'I
                                                                                                                                                                                                                                                            ~   <<          , I I,, I'>>>>>./                                          'I I
I I    C        ~                                                              kt                  C      I                                                                                                  >>
I ~ I~
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A 4      IICQC          /    ~                                                                                                      4      A -        I<<V        ~                                                                                                                  4
                                                                                    ~        4                t                                                                                                                                                                                          ~      C>>
k
: 6. Provide a description of the dose rate at the surface of the pool water for both Units I and 2 from the fuel assemblies, control rods, burnable poison rods or any miscellaneous materials stored in the pool. Also, provide the dose rate from individual fuel assemblies as they are being transferred to the cask, and specify the depth of water shielding the fuel assemblies as they are being transferred. If the depth of water shielding over a fuel assembly during transfer is less than IO feet, or the dose rate 3 feet above the SFP water is greater than 5 mR/hr above ambient radiation levels, then propose a technical specification specifying the minimum depth of water shielding to be maintained over the fuel assembly as it is being transferred in order 'to maintain ALARA limits, and identify the measures taken to assure that this minimum depth will be maintained.
        ~Res  onse Travel stops in the fuel handling equipment for both units limit the travel to restrict withdrawal of the spent fuel assemblies. This limitation, together with water level control, results in the maintenance of a minimum water cover of 9 ft. over the active portion of the fuel assembly, resulting in a radiation level of 2.5 mR/hr or less at the surface of the water (see St.
Lucie Unit I FSAR Section 9.I.4.3 and St. Lucie Unit 2 FSAR Section 9.I.4.3.3). Note that if the travel stops should fail and there were no operator action, the fuel handling machine cannot raise the assembly above a 9 ft. water-to-active-fuel-length height because of the spent fuel machine design geometry.
Refer to FPL response to Question 7 for a discussion on maintaining ALARA limits during fuel assembly transfer. FPL's ALARA program, coupled with design geometry, interlocks and limit switches obviate the need for additional fuel transfer Technical Specifications.
: 7. a. Describe the manner in which occupational exposure will be kept ALARA during the transfer, including the need for and the manner in which cleaning of the crud on SFP walls will be performed to reduce exposures rates in the SFP area. Also, describe the means to be utilized to ensure that doses to divers are maintained ALARA.
: b. Describe the manner in which occupational exposure    will be kept ALARA during cleanup operations after completion of the spent fuel transfer.
          ~Res onse
: a. During the postulated fuel transfer, occupational exposures will be limited by ALARA procedures and guidelines which currently exist at St.
Lucie. Additionally, experience gained from previous fuel movement operations and the thermal shield removal from Unit I will be used in keeping exposures ALARA. FPL letter L-86-458, dated November l4, I 986  describes  FPL's ALARA program and personnel exposure experiences.
Crud on the SFP walls for either unit presents            an  insignificant contribution to exposure at St. Lucie.
Divers would not be used in transferring spent fuel between the units.
E JW4/00 I /5
 
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: b. As discussed in item a., above, occupational exposure from cleanup operations which would result from the postulated fuel transfer will be limited to ALARA by procedures and guidelines which currently exist at St. Lucie.
: 8. Discuss the extent of damage that the SFP may incur from a dropped spent fuel shipping cask, and confirm that sufficient borated make-up water is available'o maintain the minimum SFP water level for any resulting leakage.
          ~Res onse Section 9.I.4.3 of the Unit I FSAR postulates two cask drop accidents for the Unit I SFP, a vertical and a tipped cask drop. The vertical cask drop into the cask storage area has been analyzed to determine if the leaktight barrier of the pool can be breached. The results of the analysis indicate that the leaktight integrity is maintained for a 25 ton cask drop. Technical Specification 3/4.9. I3, "Spent Fuel Cask Crane," provides assurance that the Unit I fuel cask crane does not handle loads in excess of 25 tons. A tipped cask drop has also been considered and the analysis results found to be acceptable.
In the Unit 2 spent fuel pool a concrete wall to the top of the SFP separates the cask storage area from the spent fuel storage area. The wall prevents a water level reduction over the spent fuel assemblies even if a dropped fuel cask causes damage to the pool or pool liner in the cask storage area.
For both units, the cask is physically prevented and administratively prohibited from traveling over the SFP outside the cask storage area.
: 9. Provide an evaluation of the total dose to members of the public resulting from the proposed transfer considering the following:
: a. time required to move each fuel assembly from the Unit        I SFP to the Unit 2 SFP;
: b. releases of radioiodines and other radionuclides during this time;
: c. direct radiation;
: d. transfer and cleanup operations; and
: e. other sources  of exposure at the site.
          ~Res onse The only dose to members of the public that could potentially occur would be as a result of a fuel handling or cask drop accident. These accidents have been analyzed in the Unit I FSAR Sections 9.I.4.3 and l5.4.3.2 and in the Unit 2 FSAR Sections l5.7.4. I.2 and I5.7.4.I.3.
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IO. Describe the provisions for monitoring releases of radioactive materials, environmental radiological monitoring, and calculating and reporting effluents and offsite doses from the proposed transfer operations and subsequent clean-up operations, or justify not providing such monitoring, calculating, and reporting.
          ~Res onse St. Lucie Unit      I and Unit 2 Technical Specifications Section 3/4. I I, "Radioactive Ef fluents," and 3/4. I 2, "Radiological Environmental Monitoring", provide requirements on the monitoring of radioactive releases, environmental monitoring and subsequent reporting requirements.
Any potential fuel transfer would be subject to these requirements.
I I. Your request indicates that spent fuel will be transferred only from Unit I to Unit 2. Confirm that this is the case. If your request also involves the capability to transfer spent fuel from Unit 2 to Unit I, provide information comparable to that indicated previously for this case, or confirm that the conditions of the transfer will be identical to that for Unit I to Unit 2.
          ~Res onse lf a full core off-load is required prior to reracking the Unit I SFP, only fuel discharged from Unit I will be transferred to Unit 2. No fuel discharged from Unit 2 will be transferred to Unit I. However, after reracking the Unit I SFP, any spent fuel from Unit I which may have been transferred to the Unit 2 SFP could be returned to the Unit I SFP under the conditions described above.
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Latest revision as of 13:47, 4 February 2020

Forwards Addl Info for 860702 Application for Amend to License NPF-16 Re Spent Fuel Storage,Per 861210 Request. Shipping Cask Models NAC-1 & NLI-1/2 Only Casks That Meet 25 Ton Tech Spec Limit for Unit 1 Cask Crane
ML17219A347
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 02/09/1987
From: Woody C
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-87-48, NUDOCS 8702180096
Download: ML17219A347 (22)


Text

REGULATORY'ORI"IATION DISTRIBUTION BYR~EI'I (R IDS)

ACCESSION NBR: 8702180096 DQC..DATE.'7/02/09 NOT*RI D: NO DOCKET FAC IL: 50-335 St. Lucie Planti Unit ii Florida Power Cc Light Co. 05000335 50-389 St. Lucie Planti Unit 2> Florida Power 5 Light Co. 05000389 AUTH. NAI'IE AUTHOR AFFILIATION WOODY~ C. O. Florida Power Sr Light Co.

REC IP. NAI'IE RECIPIENT AFFILIATION Document Control Branch (Document-'ontrol Desk)

SUBJECT:

Forwards addi info for 860702 applicati on for amend to License NPF-16 re spent fuel storage> per 861210 request.

Shipping cask I'Iodels NAC-1 5 NLI-1/2 only casks that meet 25 TITLE:

NOTES:

QR ton Tech Spec limit for Unit 1 cask crane.

DISTRIBUTION CODE: A001D COPIEB RECEIVED: LTR Submittal: General Distribution i ENCL I BI ZE:

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FEBRUARY 9 1987 L-87-48 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Gent lemen:

Re: St. Lucie Units I and 2 Docket Nos. 50-335 and 50-389 S ent Fuel Transfer By letter L-86-250, dated July 2, l986, Florida Power & Light Company (FPL) proposed to amend the St. Lucie Unit 2 operating license NPF-l6 to establish the option of storing spent fuel from St. Lucie Unit I in the St. Lucie Unit 2 spent fuel pool. The Unit I spent fuel pool will lose full core reserve capacity as a result of the l987 refueling outage, and the planned Unit I spent fuel pool rerack cannot be accomplished prior to l988. If, in the interim, full core off-load of Unit I should be necessary, Unit I spent fuel could be stored in the Unit 2 spent fuel pool.

By letter dated December IO, I 986 (E. G. Tourigny to C. O. Woody) the NRC Staff requested additional information required to continue their review of this proposed license amendment. Attached is FPL's response to this request.

lf additional information is required on this topic, please contact us.

Very,truly yours, C. O. W Group President Nuclear Energy COW/E JW/gp Attachment cc: Dr. J. Nelson Grace, Region II, USNRC USNRC Resident Inspector, St. Lucie Plant ool 8702i80096 87020905000335 PDR ADOCK p PDR

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ATTACHMENT REQUEST FOR ADDITIONALINFORMATION FLORIDA POWER 8 LIGHT COMPANY ST. LUCIE UNITS I AND 2 SPENT FUEL TRANSFER BETWEEN UNITS PLANT, ELECTRICAL, INSTRUMENTATIONAND CONTROL SYSTEMS BRANCH In your submittal dated July 2, l986, you proposed a licensing amendment to establish the option of transferring and storing spent fuel assemblies (SFAs) from the St. Lucie Unit I spent fuel pool (SFP) to the St. Lucie Unit 2 SFP in order to permit full core off-load capability at Unit I, should it be required, due to loss of Unit I full core reserve storage capacity following the l987 refueling outage.

Provide the following additional information with respect to this proposal:

I. Provide further details regarding the Unit I SFAs to be stored in the Unit 2 SFP. The details should include number, type and age of existing SFAs to be transferred to Unit 2 and the SFA locations in the Unit 2 storage racks to be utilized. Also provide any necessary drawings to clarify your response.

~Res onse The St. Lucie Unit I spent fuel assemblies which would be considered initially for storage in the St. Lucie Unit 2 spent fuel pool would be those that have had the longest decay time in the Unit I spent fuel pool, i.e. Batch A, Combustion Engineering assemblies which were offloaded from the Unit I core during Unit I s first refueling outage in April-May l978, and have remained in the spent fuel pool since that offload. Refer to St. Lucie Unit I Updated Final Safety Analysis Report (FSAR) Table 4.2-l and Figure 4.2-3.

Although the proposed amendment would not limit the number of SFAs that could be transferred to the Unit 2 SFP, it is expected that only l5 to 25 SFAs would be subject to transfer, should this option become nescessary.

Figure I-I shows the Unit I spent fuel pool with the Batch A assemblies indicated.

Figure I-2 shows the Unit 2 spent fuel pool. The Unit I assemblies would be put into the indicated rack positions closest to the cask laydown area, should the transfer be necessary. This would be consistent with the requirements of St. Lucie Unit 2 Technical Specification 5.6.l.

2. Confirm that you will handle no more than one SFA at a given time in a shipping cask, and that only one type of shipping cask will be used.

~Res onse At this time, shipping cask Model Nos. NAC-I and NLI-I/2 are the only casks that meet the 25 ton Technical Specification 3.9. I3 limit for. the Unit I cask crane. Both the NAC-I and NLI-I/2 casks are capable of holding only one PWR fuel assembly. Therefore, handling more than one SFA in a cask is prevented by the design of these casks.

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3e Provide a summary of the evaluation performed concerning the shipping cask load path between the units. This summary should include a discussion of the means utilized to confirm that safety related equipment including piping, components, and electric conduits that are located near the load path and those that are buried under the load path will not be adversely affected with regard to their capability to perform their intended safety functions during normal spent fuel transfer from Unit I to Unit 2 and in the event of an accident such as cask drop. Also, provide any necessary drawings to clarify your response.

~Res ense The evaluation considered a spent fuel trans-shipment path starting at the Unit I cask loading area and traveling to the Unit 2 cask loading area as indicated in Figure 3-l. This path, in its entirety, coincides with a portion of the intermodal cask transporter path previously evaluated for effects upon underground structures and utilities. The spent fuel trans-shipment path road surface is paved with Portland cement concrete or asphaltic concrete.

The fuel elements to be transported will utilize a one element shipping cask having a maximum weight of 25 tons when loaded with the spent fuel assembly. Two transport vehicles were considered in the evaluation. Wheel loads for the two vehicles are shown in Figures 3-I and 3-2. The reactions of the two transport vehicles were compared to the maximum reactions of the intermodal cask transporter that was previously evaluated. Since the reactions of the intermodal cask transporter are greater than the reaction for either of the two transport vehicles, the intermodal cask transporter evaluation is considered to be an enveloping evaluation.

The effect of the intermodal cask transporter wheel loads (and thus the spent fuel transporter wheel loads) on the roadway, missile protection slabs and underground facilities (i.e., pipes, electrical conduit, manholes and catch basins) has been analyzed. The punching shear of the concrete roadway is acceptable for surface areas of both single and dual tire wheels. Each surface area was also evaluated for maximum soil bearing capacity and found to be acceptable. The maximum stresses and deflections of the missile protection slabs, underground pipes and conduit are within the allowable range. The ultimate strength design of the manholes and catch basins using the appropriate load criteria was reviewed and found to be acceptable.

The roadway will be inspected for general deterioration so that it can be repaired, if necessary, prior to the transport of spent fuel. The shipping cask will be adequately secured to the transport vehicle.

The possibility of a cask drop has been greatly minimized by the following:

a. conservative design margins in the lifting components
b. redundant braking systems for hoist systems
c. periodic tests and inspections of the cranes E JW4/001/3

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e. the use of approved operating and administrative procedures Refer to FPL response to Question No. 8 for a discussion of a cask drop accident in the cask laydown area of either unit.
4. Provide the details of the spent fuel shipping cask and verify that it meets the requirements of 10 CFR Part 71.

~Res onse For any transfer of fuel between St. Lucie Units I and 2 prior to completion of the rerack of the Unit I fuel storage pool, the specific cask type will be either the Model No. NAC-I or the Model NLI-I/2 series.

Pursuant to 10 CFR 71.12, FPL will register the NAC-I cask with the NRC prior to its use. The NRC has issued Certificate of Compliance No. 9183, Revision No. 3 dated November 14, 1984 for this cask which states that the NAC-I is approved for use under the general license provisions of 10 CFR Part 71.12.

The NLI-I/2 cask is currently registered for use by FPL. The NRC has issued Certificate of Compliance No. 9010, Revision No. 16, dated January 16, 1986 for this cask which states that the NLI-I/2 is approved for use under the general license provisions of 10 CFR Part 71.12.

5. According to the technical specification for St. Lucie Unit I, the spent fuel storage cask can be moved into the spent fuel storage pool area when the spent fuel in the pool has aged more than 1190 or 1490 hours0.0172 days <br />0.414 hours <br />0.00246 weeks <br />5.66945e-4 months <br />, depending on the amount of spent fuel in the pool. The technical specifications also allow new spent fuel to be moved into the spent fuel storage area after the reactor has been shutdown for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. However, there is no basis provided for the minimum shutdown time that would be required if new spent fuel were transferred by a shipping cask to the St. Lucie Unit 2 SFP. Therefore, provide an analysis for the minimum shutdown time that would be required for a postulated design basis cask drop accident occurring outdoors between Units I and 2 and confirm that the resulting off-site doses are less than 10%

of the 10 CFR Part 100 guideline dose values.

~Res onse Section 9.1.4.3.e of the Unit I FSAR provides an analysis of the potential offsite dose resulting from the dropping of a cask containing ten spent fuel assemblies outside the fuel handling building under adverse meteorological dilution conditions. This analysis assumes not only ten assemblies, but also a minimum decay of 90 days. Because the Batch A assemblies have decayed in excess of eight years and only one SFA will be transferred at a time as discussed in the response to Question 2, the above referenced analysis is bounding. Therefore, no additional analysis is necessary.

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6. Provide a description of the dose rate at the surface of the pool water for both Units I and 2 from the fuel assemblies, control rods, burnable poison rods or any miscellaneous materials stored in the pool. Also, provide the dose rate from individual fuel assemblies as they are being transferred to the cask, and specify the depth of water shielding the fuel assemblies as they are being transferred. If the depth of water shielding over a fuel assembly during transfer is less than IO feet, or the dose rate 3 feet above the SFP water is greater than 5 mR/hr above ambient radiation levels, then propose a technical specification specifying the minimum depth of water shielding to be maintained over the fuel assembly as it is being transferred in order 'to maintain ALARA limits, and identify the measures taken to assure that this minimum depth will be maintained.

~Res onse Travel stops in the fuel handling equipment for both units limit the travel to restrict withdrawal of the spent fuel assemblies. This limitation, together with water level control, results in the maintenance of a minimum water cover of 9 ft. over the active portion of the fuel assembly, resulting in a radiation level of 2.5 mR/hr or less at the surface of the water (see St.

Lucie Unit I FSAR Section 9.I.4.3 and St. Lucie Unit 2 FSAR Section 9.I.4.3.3). Note that if the travel stops should fail and there were no operator action, the fuel handling machine cannot raise the assembly above a 9 ft. water-to-active-fuel-length height because of the spent fuel machine design geometry.

Refer to FPL response to Question 7 for a discussion on maintaining ALARA limits during fuel assembly transfer. FPL's ALARA program, coupled with design geometry, interlocks and limit switches obviate the need for additional fuel transfer Technical Specifications.

7. a. Describe the manner in which occupational exposure will be kept ALARA during the transfer, including the need for and the manner in which cleaning of the crud on SFP walls will be performed to reduce exposures rates in the SFP area. Also, describe the means to be utilized to ensure that doses to divers are maintained ALARA.
b. Describe the manner in which occupational exposure will be kept ALARA during cleanup operations after completion of the spent fuel transfer.

~Res onse

a. During the postulated fuel transfer, occupational exposures will be limited by ALARA procedures and guidelines which currently exist at St.

Lucie. Additionally, experience gained from previous fuel movement operations and the thermal shield removal from Unit I will be used in keeping exposures ALARA. FPL letter L-86-458, dated November l4, I 986 describes FPL's ALARA program and personnel exposure experiences.

Crud on the SFP walls for either unit presents an insignificant contribution to exposure at St. Lucie.

Divers would not be used in transferring spent fuel between the units.

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b. As discussed in item a., above, occupational exposure from cleanup operations which would result from the postulated fuel transfer will be limited to ALARA by procedures and guidelines which currently exist at St. Lucie.
8. Discuss the extent of damage that the SFP may incur from a dropped spent fuel shipping cask, and confirm that sufficient borated make-up water is available'o maintain the minimum SFP water level for any resulting leakage.

~Res onse Section 9.I.4.3 of the Unit I FSAR postulates two cask drop accidents for the Unit I SFP, a vertical and a tipped cask drop. The vertical cask drop into the cask storage area has been analyzed to determine if the leaktight barrier of the pool can be breached. The results of the analysis indicate that the leaktight integrity is maintained for a 25 ton cask drop. Technical Specification 3/4.9. I3, "Spent Fuel Cask Crane," provides assurance that the Unit I fuel cask crane does not handle loads in excess of 25 tons. A tipped cask drop has also been considered and the analysis results found to be acceptable.

In the Unit 2 spent fuel pool a concrete wall to the top of the SFP separates the cask storage area from the spent fuel storage area. The wall prevents a water level reduction over the spent fuel assemblies even if a dropped fuel cask causes damage to the pool or pool liner in the cask storage area.

For both units, the cask is physically prevented and administratively prohibited from traveling over the SFP outside the cask storage area.

9. Provide an evaluation of the total dose to members of the public resulting from the proposed transfer considering the following:
a. time required to move each fuel assembly from the Unit I SFP to the Unit 2 SFP;
b. releases of radioiodines and other radionuclides during this time;
c. direct radiation;
d. transfer and cleanup operations; and
e. other sources of exposure at the site.

~Res onse The only dose to members of the public that could potentially occur would be as a result of a fuel handling or cask drop accident. These accidents have been analyzed in the Unit I FSAR Sections 9.I.4.3 and l5.4.3.2 and in the Unit 2 FSAR Sections l5.7.4. I.2 and I5.7.4.I.3.

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IO. Describe the provisions for monitoring releases of radioactive materials, environmental radiological monitoring, and calculating and reporting effluents and offsite doses from the proposed transfer operations and subsequent clean-up operations, or justify not providing such monitoring, calculating, and reporting.

~Res onse St. Lucie Unit I and Unit 2 Technical Specifications Section 3/4. I I, "Radioactive Ef fluents," and 3/4. I 2, "Radiological Environmental Monitoring", provide requirements on the monitoring of radioactive releases, environmental monitoring and subsequent reporting requirements.

Any potential fuel transfer would be subject to these requirements.

I I. Your request indicates that spent fuel will be transferred only from Unit I to Unit 2. Confirm that this is the case. If your request also involves the capability to transfer spent fuel from Unit 2 to Unit I, provide information comparable to that indicated previously for this case, or confirm that the conditions of the transfer will be identical to that for Unit I to Unit 2.

~Res onse lf a full core off-load is required prior to reracking the Unit I SFP, only fuel discharged from Unit I will be transferred to Unit 2. No fuel discharged from Unit 2 will be transferred to Unit I. However, after reracking the Unit I SFP, any spent fuel from Unit I which may have been transferred to the Unit 2 SFP could be returned to the Unit I SFP under the conditions described above.

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