ULNRC-06821, Post-Audit Follow-Up Information in Support of Callaways License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301)

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Post-Audit Follow-Up Information in Support of Callaways License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301)
ML23172A145
Person / Time
Site: Callaway Ameren icon.png
Issue date: 06/21/2023
From: Jungmann B
Ameren Missouri, Union Electric Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
EPID L-2022-LLA-0150, EPID L-2022-LLE-0030, ULNRC-06821
Download: ML23172A145 (1)


Text

ULNRC-06821 June21,2023 Page4of5 cc:Mr.RobertLewis RegionalAdministrator U.S.NuclearRegulatoryCommission RegionIV 1600EastLamarBoulevard Arlington,TX76011-4511 SeniorResidentInspector CallawayResidentOffice U.S.NuclearRegulatoryCommission 8201NRCRoad Steedman,MO65077 Mr.MaheshChawla ProjectManager,CallawayPlant OfficeofNuclearReactorRegulation U.S.NuclearRegulatoryCommission MailStopO8B1A Washington,DC20555-0001

toULNRC-06821 Page3of5 Item2RegardingTable5-18,UncontrolledRCCABankWithdrawalatPower:Results, containedinReference7,providethefollowing:

-additionalexplanationofhowthe10%RTPBOCMDNBRvalueistheboundingcondition giventhatitisnumericallylargerthanotherMDNBRvaluespresentedinthetable.

-thedeterministicallyderivedMDNBRvalueandthebasisforitsreplacementwiththe statisticallyderivedvalueshowninthetable.

AmerenMissouriResponse:

Page40ofReference10liststhedeterministicMDNBRoftheBOCIO%RTPcaseas1.088.

Thisdeterministicvalueconstitutesthelimitingcasewhencomparedtotheothercases presentedinTable5-18ofReference7.Becausethisdeterministicvaluewasbelowthe MDNBRlimit,astatisticalanalysiswasperformed,resultingintheacceptablevaluelistedin Table5-18ofReference7of1.228.

Item3-RegardingTable5-18,UncontrolledRCCABankWithdrawalatPower:Results, containedinReference7,providethefollowing:

-elaborateonthemeaningofoverallpowerusedinNote2ofthetable.

-abriefexplanationforhowthelimitingPLHGR[peaklinearheatgenerationratejwas selected.AmerenMissouriResponse:

Section7.3,PLHGR,onpage42ofReference10showsthecalculationforthePLHGR.

Theonlyinputthatvariesbetweenthecasesanalyzedisthepeaktransientpower.The paragraphfollowingTable7-3,PLHGRInputsforUCBW,elaboratesthatthepower identifiedisthekineticpower(nottheheatflux).Allcasesanalyzedwereexamined,and thosewherethereactivityinsertionratewaslessthanorequalto50pcm/s(consistentwith thecycle-to-cyclecheckinAppendixBofReference11,tablenotec)weresorted.Oneof theBOC10%RTPcasesresultedinapeaktransientkineticpowerof146.2%RTP,whichis whatisusedinthecalculationshownonpage42ofReference10.Thewordingofthepower describedinNote2toTable5-18inReference7canbeclarifiedfromoverallpowerto overallpeaktransientkineticpower.

Question4-RegardingSection5.21,UncontrolledRCCABankWithdrawalatPower (FSARSP15.4.2),inReference7,itisobservedthatthetextappearstousecriticalheat flux(CHF)anddeparturefromnucleateboiling(DNB)interchangeably.Isthereareasonfor thedifferentusage?

AmerenMissouriResponse:

ThetermsCHFandDNBandtheirassociatedlimitsareusedinterchangeablyinthis sectionofReference7. toULNRC-06821 Page4of5 REFERENCESI.AmerenMissouriletterULNRC-06768,ApplicationforTechnicalSpecification ChangeandExemptionRequestRegardingUseofFrarnatomeGAlAFuel (LDCN22-0002),ADAMSAccessionNo.ML22285A115,October12,2022.

2.AmerenMissouriletterULNRC-06783,SupplementtoLicenseAmendment RequestandExemptionRequestRegardingUseofFramatomeGAlAFuel (LDCN22-0002)(EPIDL-2022-LLA-0150andL-2022-LLF-0030),ADAMS AccessionNo.ML22335A498,December1,2022.

3.NRCLetterfromMaheshChawla(NRC)toFadiDiya(Ameren),CallawayPlant, UnitNo.1RegulatoryAuditPlanandSetupofOnlineReferencePortalforLicense AmendmentRequestandExemptionforFuelTransitiontoFramatomeGAlAFuel (EPIDL-2022-LLA-0150andEPIDL-2022-LLE-0030),ADAMSAccessionNo.

ML23068A375,March20,2023.

4.NRCLetterfromMaheshChawla(NRC)toThomasElwood(Ameren),Regulatory AuditQuestions -CallawayLARandExemptionforFuelTransitiontoFramatome GAlAFuel -EPIDs -L-2022-LLA-0150andL-2022-LLE-0030,ADAMS AccessionNo.ML23107A181,April17.2023.

5.NRCLetterfromMaheshChawlaNRC)toThomasElwood(Ameren),Regulatory AuditQuestion -CallawayLARandExemptionforFuelTransitiontoFramatome GAlAFuel -EPIDs -L-2022-LLA-0150andL-2022-LLE-0030,ADAMS AccessionNo.ML23114A230,April24,2023.

6.AmerenMissouriletterULNRC-06808.PostAuditSupplementtoLicense AmendmentRequestandExemptiontoAllowUseofFramatomeGAlAFuel (LDCN22-0002)[EPIDL-2022-LLA-0150andEPIDL-2022-LLE-00301,ADAMS AccessionNo.ML23I29A794,May9,2023.

7.FramatomeInc.LicensingReportANP-3969(P),Revision2,CallawayNon-LOCA SummaryReport,October2022(includedasAttachment12toEnclosure1in Reference1).

8.AmerenMissouriletterULNRC-06526,RequestforLicenseAmendmentand RegulatoryExemptionsforaRisk-InformedApproachtoAddressGSI-191and RespondtoGL2004-02(LDCN19-0014),ADAMSAccessionNo.ML21090A185, March31,2021.

9.NRCletterCallawayPlant,UnitNo.1IssuanceofAmendmentNo.22$Re:

ReviseTechnicalSpecificationstoAddressGenericSafetyIssue-19landRespondto GenericLetter2004-02UsingaRisk-InformedApproach(EPID L-2021-LLA-0059),ADAMSAccessionNo.ML22220A132,October21,2022.