ML22123A333

Pre-Submittal Meeting 2: TSTF-51, TSTF-471, TSTF-490, and Alternative Source Term License Amendment Request - May 10, 2022 (EPID L-2022-LRM-0033)(slides)

ML22123A333
Person / Time
Site:	Vogtle
Issue date:	05/10/2022
From:	Southern Nuclear Company
To:	Office of Nuclear Reactor Regulation
Lamb, J.
References
EPID L-2022-LRM-0033
Download: ML22123A333 (41)

Text

TuesdayMay10th,2022 VogtleUnits1&2PreSubmittalMeeting2:TSTF51,TSTF471, TSTF490,andAlternativeSourceTermLicenseAmendmentRequest

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2 Overview

• Purpose

• Recapof1st PreSubmittalMeeting

• LicenseAmendmentRequest(LAR)Overview

• Tableof Contents

• PreliminaryDoseAnalysesSummary

• ImpactofTSTFsonASTDoseAnalyses

• SubmittalandRequestedReviewSchedule

• CommentsandDiscussion

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3 Purpose Discussthefollowing:

-AnoverviewoftheLARcontents

-SNCscheduleforLARsubmittal

-RequestedLARreviewduration

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4 Recapof1st PreSubmittalMeeting

• RequesteduseofASTtoallowforpeakburnup62GWD/MTU(coveredbyRG 1.183Rev.0)

• Requestedexceptiontoallowupto40%ofrodsinanassemblyexceedRG1.183 Rev.0LHGRlimitof6.3kW/ft

- RequestedLHGRof7.5kW/ftfor40%ofrods

• RequestedtoincludeTSTF490inthesubmittal

• Meetingmaterialsandnotescanbefoundin

- ML21238A384;ML21172A131

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5 Recapof1st PreSubmittalMeeting

• PrecedentsforRG1.183Rev.0Footnote11exception Plant

%ofRodsExceed ADAMS#

Kewaunee 50 ML070430020 PointBeach 100 ML110240054 IndianPoint2 100 ML042960007 IndianPoint3 100 ML050750431 WolfCreek 10 ML19100A122 Vogtle1&2 (Requested) 40 TBD

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6 LicenseAmendmentRequestOverviewTSTFs

• TSTF490Rev.0,DeletionofEBarDefinitionandRevisiontoRCSSpecific ActivityTechSpec(ML052630462)

• TSTF51A,Rev.2,ReviseContainmentRequirementsDuringHandling IrradiatedFuelandCoreAlterations(ML040400343)

• TSTF471A,Rev.1,EliminateUseofTermCoreAlterationsinActionsand Notes(ML19101A215)

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7 LicenseAmendmentRequestOverviewASTTechnicalEvaluations

• TechnicalEvaluationsforAST:

- AtmosphericDispersionFactors

>> Meteorologicaldatausedissameasintheapprovedanalysesofrecord(AOR)

>> NewOnsite X/QdosereceptorpairsusedfornonLOCAevents(FuelBuilding,ARVdischargeto atmosphere)

- CoreandRCSSourceTerms

- LossofCoolantAccident(LOCA)

- FuelHandlingAccident(FHA)

- LockedRotorAccident(LRA)

- ControlRodEjectionAccident(CRE)

- MainSteamLineBreakAccident(MSLB)

- SteamGeneratorTubeRuptureAccident(SGTR)

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8 LicenseAmendmentRequestOverview(contd)

• Keyanalysisspecificdescriptionsandinputsincludedintheenclosures:

- ControlRoomEmergencyFiltrationSystem(CREFS)modelingspecifics

- AnalysisspecificX/Qs

- Analysisspecificgapfractions

- GenericInputs

>> RCSmassandvolumes

>> SGmassandvolumes

>> Breakflows(whereapplicable)

>> Primarytosecondaryflows(whereapplicable)

>> Atmosphericflows,leakrates,etc.

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9 LicenseAmendmentRequestOverview(contd)

• RG1.183Rev.0ConformanceTables

• ASTAccidentAnalysisInputValuesComparisonTables

• EnvironmentalQualification

- Impactsevaluatedusinglegacyapprovedapproach(TID14844)

- EQisunaffectedbytheadoptionofASTmethods

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10 LARTableofContents Enclosure 1.0SummaryofDescription 2.0DetailedDescription 3.0TechnicalEvaluation 4.0RegulatoryEvaluation 5.0EnvironmentalEvaluation 6.0References

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11 LARTableofContents Attachments

1. OperatingLicenseandTSMarkups

2. TSBasesMarkups

3. RG1.183ConformanceTables

4. LOCAAnalysis

5. FHAAnalysis

6. MSLBAnalysis

7. SGTRAccidentAnalysis

8. CREAccidentAnalysis

9. LRAccidentAnalysis

10. ASTAccidentAnalysisInputValuesComparisonTables

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12 PreliminaryDoseAnalysesSummary REM(TEDE)

Accident EAB LPZ CR AcceptanceCriteria(EAB/LPZ/CR)

LOCA 8.4 9.6 4.4 25/25/5 FHA 1.0 0.4 3.9 6.3/6.3/5 LRA

<0.1

<0.1 0.3 2.5/2.5/5 CRE*

1.5 1.8 1.1 6.3/6.3/5 MSLB**

0.2 0.2 0.2 2.5/2.5/5 SGTR***

1.6 0.9 0.6 25/25/5

• Containmentreleaselimitingforoffsite.Secondaryreleaselimitingforonsite.

• • ConcurrentSpikecaseislimitingandreportedabove(bothanalyzed)

• • • PreaccidentSpikecaseislimitingandreportedabove(bothanalyzed)

Alldosesdemonstratemargintoregulatorylimits

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13 PreliminaryDoseAnalysesSummary Accident Discussion LOCA Limitinganalysisfordose(EAB/LPZ/CR)

FHA 1.UtilizesincreasedgapfractionsforRG1.183Footnote11exception(LHGR) 2.Unfiltered2hourreleasefromFuelBuildingislimitingbyinspection(X/Qs) 3.Nocreditforfiltrationorcontainmenthatchclosures 4.Alldosesdemonstratemargintoregulatorylimits LRA Notasignificantcontributortodose CRE Containmentreleaselimitingoffsite.Secondaryreleaselimitingforonsite MSLB Notasignificantcontributortodose SGTR Notasignificantcontributortodose

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14 PreliminaryDoseAnalysesSummary

• Highlights

- LOCA

>> Mostlimitingaccidentfortotaldose

- FHA

>> Models100%ofrodsasexceedingLHGRlimit,eventhoughonly40%couldexceed

• Usesincreasedreleasefractionsforalldamagedrods(314)

• Decaytimeis70hoursaftershutdown

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15 ImpactofTSTFsonASTDoseAnalyses

• TSTF490

- RCSequilibriuminitialdoseconcentrationsfornoblegasesbasedondoseequivalent Xenon-133at(280µCi/g)

• TSTF471andTSTF51

- Applicableinshutdownmodeswherefuelmovementorcorealterationsoccur

- FHAanalysistakesnocreditforfilteredventilationorclosureofcontainmenthatches

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16 ProposedTSChanges

• TS1.1Definitions

• TS3.3.6ContainmentVentilationIsolationInstrumentation

• T3.3.7CREFSActuationInstrumentation

• TS3.4.16RCSSpecificActivity

• TS3.7.12CREFS BothUnitsShutdown

• T3.8.2ACSources-Shutdown

• T3.8.5DCSources-Shutdown

• TS3.8.8Inverters - Shutdown

• TS3.8.10DistributionSystems-Shutdown

• TS3.9.1Boron Concentration

• TS3.9.2Unborated WaterSourceIsolationValves

• TS3.9.3NuclearInstrumentation

• TS 3.9.4 Containment Penetrations

• TS3.9.7RefuelingCavityWaterLevel

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17 TS1.1Definitions

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18 TS1.1Definitions

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19 TS3.3.6ContainmentVentilationIsolationInstrumentation

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20 TS3.3.6ContainmentVentilationIsolationInstrumentation

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21 T3.3.7CREFSActuationInstrumentation

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22 TS3.4.16RCSSpecificActivity

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23 TS3.4.16RCSSpecificActivity

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24 TS3.4.16RCSSpecificActivity

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25 TS3.4.16RCSSpecificActivity

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26 TS3.7.12CREFS BothUnitsShutdown

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27 TS3.7.12CREFS BothUnitsShutdown

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28 T3.8.2ACSources Shutdown

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29 T3.8.2ACSources Shutdown

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30 T3.8.5DCSources Shutdown

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31 TS3.8.8Inverters Shutdown

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32 TS3.8.10DistributionSystems Shutdown

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33 TS3.8.10DistributionSystems Shutdown

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34 TS3.9.1BoronConcentration

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35 TS3.9.2Unborated WaterSourceIsolationValves

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36 TS3.9.3NuclearInstrumentation

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37 TS3.9.4ContainmentPenetrations

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38 TS3.9.7RefuelingCavityWaterLevel

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39 SubmittalandRequestedReviewSchedule SNCSubmit LARJune 2022 NRCReview (Requested) andapprove LARJuly2022

- July2023 LARApproval July2023

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40 CommentsandDiscussion

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