ML010780212

Safety Evaluation for an Amendment to an Approved 10 CFR 20.2002 Application for the Vermont Yankee Nuclear Power Station

ML010780212
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	03/14/2001
From:	Gibson K NRC/NRR/DIPM/IOLB
To:	Clifford J NRC/NRR/DLPM/LPD1
Hayes a
References
FOIA/PA-2005-0293
Download: ML010780212 (6)

Text

March14,2001MEMORANDUMFOR:JamesW.Clifford,ChiefSection2 ProjectDirectorateI DivisionofLicensingProjectManagement OfficeofNuclearReactorRegulationFROM:KathyHalveyGibson,Chief/RA/EmergencyPreparednessandHealthPhysicsSectionOperatorLicensing,HumanPerformance,andPlantSupportBranchDivisionofInspectionProgramManagement OfficeofNuclearReactorRegulation

SUBJECT:

SAFETYEVALUATIONFORANAMENDMENTTOANAPPROVED10CFR20.2002APPLICATIONFORTHEVERMONTYANKEE NUCLEARPOWERSTATIONTheEmergencyPreparednessandHealthPhysicsSectionhascompleteditsreviewoftheVermontYankeeNuclearPowerCorporationrequestdatedSeptember11,2001,toamendan approved10CFR20.2002(previously10CFR20.302)applicationdatedJune23,1999,as supplementedonJanuary4,2000.ThelicenseerequestedNRCapprovaltoallowtheaddition ofslightlycontaminatedsoilresultingfromon-siteconstructionrelatedactivities,includingbut notlimitedtodesignchangeimplementationandlandmaintenance,tothelistofalready approvedmaterials(i.e.,septicwaste,coolingtowersiltandsoil/sandfromroadsand walkways)foron-sitedisposal.Basedonourreview,wefindtheproposedchangestobe acceptable.Theattachmenttothismemorandumprovidesourevaluationofthelicensee's application.ThiscompletesourreviewunderTACNo.MA9972.

DocketNo.50-271

Attachment:

SafetyEvaluationCONTACT:AudreyHayes,NRR/DIPM/IOLB/EP&HP(301)415-3121 SAFETYEVALUATIONBYTHEEMERGENCYPREPAREDNESSANDHEALTHPHYSICSSECTIONOFFICEOFNUCLEARREACTORREGULATIONVERMONTYANKEENUCLEARSTATIONDOCKETNO.50-2711.0IntroductionByletterdatedSeptember11,2000,VermontYankeeNuclearPowerCorporation(thelicensee),submittedarequesttoamenda10CFR20.2002(former10CFR20.302) application,datedJune23,1999,assupplementedonJanuary4,2000,whichwasapprovedby theNRC.Thisamendmentwillallowtheadditionofslightlycontaminatedsoilresultingfromon-siteconstructionrelatedactivities,includingbutnotlimitedtodesignchangeimplementation andlandmaintenance,tothelistofalreadyapprovedmaterials(i.e.,septicwaste,coolingtower siltandsoil/sandfromroadsandwalkways)foron-sitedisposalvialandspreadingon designateddisposalfields.In1989,pursuantto10CFR20.302(current10CFR20.2002),thelicenseereceivedapprovalfromtheNRCtoroutinelydisposeofcontaminatedsepticwasteindesignatedon-siteareas.In 1997,theNRCamendedtheapprovedon-sitedisposalapplicationtoalsoincludecontaminated coolingtowersiltmaterial.In2000,theNRCamendedtheapprovedon-sitedisposal applicationtoalsoincludeaone-timedisposalofslightlycontaminatedsoilandanannual disposalof28.3cubicmetersofslightlycontaminatedsoil/sandmaterial.Inthis10CFR20.2002applicationamendment,thelicenseerequestedthatslightlycontaminatedsoilresultingfromon-siteconstructionrelatedactivitiesbedisposedofon-siteon anannualbasisuntiltheendoftheplant'soperatinglicensein2013.Theanticipatedannual volumeofsoilgeneratedbyon-siteconstruction,asidentifiedbythelicensee,combinedwith thesoil/sandgeneratedfromtheannualwinterspreadingofsandonroadsandwalkwaysatthe plantsitewillnotexceed28.3cubicmeters.Thisvolumeisthesamevolumethatwas approvedintheJanuary4,2000,request.Thelicenseeperformedacomprehensive radiologicalevaluationwhichincludedtheannualdisposalof28.3cubicmetersofsoiland soil/sandmaterials,andshowsthatthesematerialscanbemanagedon-siteinthesame mannerasthesepticwasteandcoolingtowersilt(i.e.,landspreadingondesignatedfields).

22.0EvaluationThelicenseewilldisposeofthefuturesoilmaterialusingalandspreadingtechniqueconsistentwiththecurrentcommitmentsforon-sitedisposalofsepticwaste,coolingtowersiltsand sand/soilmaterialpreviouslyapprovedbytheNRC.Thelicenseewillcontinuetousethe designatedandapprovedareasoftheirpropertywhichincludeapproximately1.9acres,which currentlyreceivesthesepticwaste,coolingtowersiltsandsoil/sandmaterial,and approximately10acreswhichhasnotbeenpreviouslyusedfordisposal.Determinationofthe radiologicaldoseimpactofthenewmaterialhasbeenmadebasedonthesamedose assessmentmodelsandpathwayassumptionsusedinthepreviouslyapprovedsubmittals.Thelicenseewillprocedurallycontrolandmaintainrecordsofalldisposals.Thefollowinginformationwillberecorded:1.Theradionuclideconcentrationsdetectedinthematerial(measuredtoradiationlevelsconsistentwiththelicensee'sradiologicalenvironmentalmonitoringprogram).2.Thetotalvolumeofmaterialdisposed.

3.Thetotalradioactivityinthedisposaloperationaswellasthetotalradioactivityaccumulatedoneachdisposalplotatthetimeofspreading.4.Theplotonwhichthematerialwasapplied.

5.Dosecalculationsormaximumallowableaccumulatedactivitydeterminationsrequiredtodemonstratethatthedoseconditionvaluesimposed(i.e.,imposedbytheapproved 10CFR20.2002applicationdatedJune23,1999)onthelandspreadingoperationhave notbeenexceeded.Theboundingdoseconditionsfortheon-sitedisposalsareasfollows:

1.Theannualdosetothewholebodyoranyorganofahypotheticalmaximallyexposedindividualmustbelessthan1.0mrem.2.Annualdosestothewholebodyandanyorganofaninadvertentintruderfromtheprobablepathwaysofexposuremustbelessthan5mrem.3.Disposaloperationsmustbeatoneoftheapprovedon-sitelocations.

4.Totalannualcombinedvolumeofsoilandsoil/sandmaterialsmustnotexceed28.3cubicmeters.Toensurethattheadditionofnewmaterialcontaininglowlevelsofradioactivitywillnotexceedtheboundingdoseconditions,foreachnewspreadingoperationthelicenseewillcalculatean estimateofthetotalradioactivitythatincludesallpastdisposalsofsepticwaste,coolingtower silt,soil/sandandsoilmaterialonthedesignateddisposalplots.Thiswillbecomparedwiththe boundingdoseconditionvalueorequivalentradioactivityvalueonaperacrebasis.

3Thelicenseeassessedthedosefromsoilandsoil/sandmaterialthatmaybereceivedbythemaximallyexposedindividualduringtheperiodofplantcontrolovertheproperty,andtoan inadvertentintruderafterplantaccesscontrolendsusingthesamepathwaymodeling, assumptions,anddosecalculationmethodsthatwerepreviouslyapprovedbytheNRCforthe septicwasteandcoolingtowersiltdisposals.Thedosemodelsarebasedontheguidancein U.S.NRCRegulatoryGuide1.109,Revision1(1977).Thelicensee'sdoseassessmentisasfollows:

1.Totalannualdosestothewholebodyandcriticalorganofthehypotheticallymaximallyexposedindividualwereestimatedtobe0.115mremand0.403mremrespectively.

Thesevaluesarelessthantheprescribedannualdoseconditionvalueof1.0mremfor thetimeperiodofactivesitecontrol.2.Totalannualdosestothewholebodyandcriticalorganofaninadvertentintruderfromtheprobablepathwaysofexposurewereestimatedtobe0.757mremand1.17mrem.

Thesevaluesarelessthantheprescribedannualdoseconditionvalueof5.0mremfor thetimeperiodafteractivesitecontrol.3.Thedosecalculationsarebasedonprojectingthemaximumpotentialimpact,ofalldisposals(pastandfuture)ontheapproveddisposalsite.3.0ConclusionThestafffindsthelicensee'sproposaltodisposeofthelow-levelradioactivesoilmaterial,pursuantto10CFR20.2002,inthesamemanner,location,andwithintheboundingdose conditionsasthematerials(i.e.,septicwaste,coolingtowersiltandsoil/sandfromroadsand walkways)previouslyapprovedbytheNRCtobeacceptable.ThelicenseehascommittedtopermanentlyincorporatethismodificationintotheirOffsiteDoseCalculationManual.

MEMORANDUMTOJamesW.Clifford,ChiefSection2 ProjectDirectorateI DivisionofLicensingProjectManagement OfficeofNuclearReactorRegulationFROM:KathyHalveyGibson,ChiefEmergencyPreparednessandHealthPhysicsSectionOperatorLicensing,HumanPerformance,andPlantSupportBranchDivisionofInspectionProgramManagement OfficeofNuclearReactorRegulation

SUBJECT:

SAFETYEVALUATIONFORANAMENDMENTTOANAPPROVED10CFR20.2002APPLICATIONFORTHEVERMONTYANKEE NUCLEARPOWERSTATION(TACNO.MA5950)TheEmergencyPreparednessandHealthPhysicsSectionhascompleteditsreviewoftheVermontYankeeNuclearPowerCorporationapplicationdatedSeptember11,2001,toamend anapproved10CFR20.2002(previously10CFR20.302)applicationdatedJune23,1999,as supplementedonJanuary4,2000.ThelicenseerequestedNRCapprovaltoallowtheaddition ofslightlycontaminatedsoilresultingfromon-siteconstructionrelatedactivitiesincludingbut notlimitedtodesignchangeimplementationandlandmaintenancetothelistofalready approvedmaterials(i.e.,septicwaste,coolingtowersiltandsoil/sandfromroadsand walkways)foron-sitedisposal.Basedonourreview,wefindtheproposedchangestobe acceptable.Theattachmenttothismemorandumprovidesourevaluationofthelicensee's application.ThiscompletesourreviewunderTACNo.MA9972.

DocketNo.50-271

Attachment:

SafetyEvaluation CONTACT:AudreyHayes,NRR/DIPM/IOLB/EP&HP(301)415-3121DISTRIBUTIONDocketFileAHayes IOHB/EP&HPR/FRpulsifer,JWhiteRIAccessionNumberDocumentName:C:\2002VYNP022301.wpdOFFICEIOLB/NRRIOLB/NRRNAMEAHAYESKGIBSON DATE3/14/20013/14/2001OFFICIALRECORDCOPY

ÿIOLBCOVERPAGEEMERGENCYPREPAREDNESS&HEALTHPHYSICSSECTIONDOCUMENTTITLE:C:\2002VYNP022301.wpdORIGINATOR:AHAYESSECRETARY:DTWIGG DATE:March7,2001

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ÿÿÿNAMEDATE1.AHAYES2.KGIBSON 3.

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5.SECRETARY/DISPATCHDOCUMENTDISPATCHED:ADAMSACCESSION#:MLTEMP=NRR-DRAFTorFINALFolder:DIPMIOLBIRSSIOHSXEP&HPSecurityRights:Owner=XNRR-DIPMSECRETARIESOtherViewer=XNRCUsersRestrictedto_______________Author=Others___________________DocumentType:MemoLetterTechnicalInputDocumentOtherSECYPAPERCase/Reference#:(TAC,WITs,YellowTicket,etc.)DocumentSensitivity:xNon-SensitiveSensitive(privacyact,proprietary,confidential,pre-decisional)(Copyright)Availability:xNon-PubliclyAvailable ORPubliclyAvailableKeywords:(IncludeTemplate#)TEMP=NRR-Comments:QualityControlCheckby:_____________

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