ML20114E275

(ANO) Carbon Fiber Reinforced Polymer (Cfrp) Relief Request Pre-Submittal Meeting with NRC - April 29, 2020

ML20114E275
Person / Time
Site:	Arkansas Nuclear
Issue date:	04/29/2020
From:	Entergy Operations
To:	Office of Nuclear Reactor Regulation
Wengert T
References
Download: ML20114E275 (15)

Text

ArkansasNuclearOne(ANO)

CarbonFiberReinforcedPolymer(CFRP)

ReliefRequest PreSubmittalMeetingwithNRC April29,2020 1

2 Topic Speaker

Introductions

NRC/ENTERGY/PUBLIC Licensee Presentation ReasonforReliefRequest OverviewofCFRPTechnology AffectedServiceWaterPiping ANOSurrySTPComparison ProposedSubmittalSchedule ReliefRequestContent Precedent ENTERGY NRCDiscussion NRC Opportunity forPublicComment PUBLIC MeetingAdjournment NRC Agenda

3

Introductions

LicenseeAttendees

- ENTERGY/ArkansasNuclearOne(ANO)- Licensee RileyKeele,DavidBice(RegulatoryAssurance)

TerryFreeman,VinceBond,BobThweatt,DanSojka,MikeHedgecock, RyanBrumwell,JoelCummins,RockyJones,JamesReece(Projects)

BryanDaiber,TomHatfield,GrantFlynn(Engineering)

ScottThessing (Operations)

- StructuralTechnologies,LLC-CFRPCompositeSystem AnnaPridmore,EmilyCernic,LeoNadeau,ChrisBurton

- SimpsonGumpertz &Heger (SGH)- CFRPDesigner Rasko Ojdrovic

Piping systems constructed of similar materials and transporting similar water have experienced degradation due to Microbiologically Influenced Corrosion (MIC).

ASME B&PVC Section XI, Rules for In-Service Inspection of Nuclear Power Plant Components, Article IWA-4000, subparagraph IWA-4221(b)(1) states:

An item to be used for repair/replacement activitiesshall meet the Construction Code to which the original item was constructed.

ANO is submitting a relief request in accordance with 10 CFR 50.55a(z)(1) requesting approval to proactively use a CFRP Composite System because CFRP was not a material available for use in the original construction codes.

4 ReasonfortheReliefRequest

• CFRPCompositeRepairSystem o

Carbonfiberfabriclayersforstrengthand glassfiberlayersforwatertightnessand dielectricbarrier.

o Fabricsaresaturatedwithatwopart epoxyandmanuallyappliedtothepipe wall o

Oncecured,theCFRPliningtakesthe placeofthehostpipeforresistingall loads

• QualityAssurance/QualityControl o

3rd Partyinspection o

OwnerandDesignRepsoversight

• CFRPOperationalExperience o

Multiplesafetyandnonsafetyrelated CFRPpipingrepairprojectssuccessfully completedonnumerouslargepipeline diameters CarbonFiberFabric GlassFiberFabric 96inch piping OverviewofCFRPTechnology 5

AffectedServiceWaterPiping

• EmergencyCoolingPondsupplypipingtoeachunits ServiceWatersystem

• ANO136diameter,ANO242diameter

• Approximately4,800linearfeettotal

• BothANOpipesarecarbonsteelandinstalledinsoil

• ANOisconsideringtwooptionsforuseofCFRP (dependentoninstallationtimerequiredandcost):

1)installCFRPonentirepipelengthand,2)install newpipeonanalternateroutewhileinstallingCFRP fromthetieinlocationstotheIntakeStructures.

Inallcases,theCFRPwillterminateonsoundASME SectionIIIpiping.

6

• SimilaritiesbetweenEntergyANO,Surry,and SouthTexasProject(STP)

- Allsubjectpipingisinstalledbelowgrade

- AllthreeapplicationsproposeuseofthesameCFRP materials,designengineer,installationteam,and QualityAssurance/QualityControlteam

• DifferencesbetweenEntergyANO,Surry,andSTP

- Surrypipingiscarbonsteelpipeencasedinreinforced concrete

- STPpipingisAluminumBronze

- EntergyANOpipingiscarbonsteel 7

ANOSurrySTPComparison

• Inadditiontopressureandotherloadsconsideredat Surry,theANOanalysiswillconsiderexternalsoil, surfaceliveload,surchargeloads,andseismicloads thatwerenotconsideredforSurrybecauseof reinforcedconcreteencasementsurroundingthepipe

• SimilartoSTP,ANOanalysiswillconsider:

- Stressduetobendingoftheburiedpipeduetogravity loads,e.g.,soilandliveloads

- Stressduetocombinedinternalpressureandgravityloads

- Bucklingresistanceofflexiblepipeburiedinsoil

- Longitudinalstressduetoseismic,hydraulicandthermal loadsforapipelineburiedinsoil 8

ANOSurrySTPComparison

• EstimatedSubmittaltoNRC:July2020

• EstimatedRequestedNRCApprovalDate:August2021

• ConstructionTimeframe:Constructionisestimated tobeginasearlyas2022.

9 ProposedReliefRequestSchedule

10 ReliefRequestContent

• Summary-ReliefRequest

• ScopeandSchedule

• DefinitionsandAcronyms

• Materials

• Design

• InstallationMethods

• Training

• FailureModesandEffectsAnalysis

• OperatingExperience

• ProprietaryAffidavits

SurryUnit1&2 11 Precedents

SurryUnits1&2 12 Precedents

SurryUnits1&2 13 Precedents

SurryUnits1&2 14 Precedents

NRCDiscussion 15