Overview of the NEK Equipment Qualification Programs2019/05/03 · • Operating Licence:40 ‐60...

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www.nek.si

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ÚJV Řež – May, 2019

Overview of theNEK Equipment QualificationPrograms

ABOUTNEK

NEKEQprograms,UJVRež,2019

• Owners: GENEnergija 50%HEP50%• Operator: NEK• NSSSSupplier: Westinghouse• ReactorType: PWR• ConstructionPermit: 1975• CommercialOperation: 1983• OperatingLicence: 40‐60years• GrossPlantOutput: 727MW

ABOUTNEK

HE(HydroPower)=4.293GWh

TE(FossilPower)=4.400GWh

NEK=5.423GWh*

Total =14116GWh

NEK shareinSlovenia inproductionofelectricalenergy

Source:ELES,MonthlyReportonthePowerSystemforDecemberandyear2016,January2017

NEK38,4 %

TE 31,2 %

HE 30,4 %

NEKEQPROGRAMSHISTORICALBACKGROUNDANDDEVELOPMENT

Construction designrequirements:

• EnvironmentalQualificationofElectricalandI&C(EQ)ReactorBuildingDBAequipmentshallbequalifiedtoIEEE323‐1971andIEEE323‐1974–NOFORMALPROGRAM

• SeismicDesign– SeismicCategoryImechanicalandelectricalequipmentfortheKRSKONuclearPowerPlantshallmeetseismicperformancerequirementsduringandfollowingtheOPERATINGBASIS EARTHQUAKE(OBE),SAFESHUTDOWNEARTHQUAKE(SSE)

ReactorBuilding(RB) Intermediate

and TurbineBuilding(IB,TB)

AuxiliaryBuilding(AB) EQ

NEKEQPROGRAMSHISTORICALBACKGROUNDANDDEVELOPMENT

NEKEnvironmental Qualification programfor Electrical and I&Cequipment:

‐ FirstPeriodic Safety Review (PSR1)– 2005actionplan

‐ Slovenian Nuclear Regualtory Body ruleJV5 „Rulesonradiationandnuclearsafetyfactors“

NEKCURRENTQUALIFICATIONPROGRAMSOVERVIEW

EQPROGRAMFORELECTRICALANDI&C EQUIPMENT

NEKEQProgramdocument:

1. ED‐12consistentwith10CFR50.49

2. ED‐12definesmethodologyandcriteriaforEQconditionsdetermination(EQzones)

3. ED‐12methodologyandcriteriaforEQMELinEQSELlists

4. Programdefinesqualificationprocess:• Methodsforqualificationand

documentation• Processcontrol(designchanges,

maintenance,purchasing)

NEKEQPROGRAMFORELECTRICALANDI&C EQUIPMENT

EnvironmentalconditionsduringandafterDBA:• LOCA• MSLB(MainSteamLineBreak)• HELB(HighEnergyLineBreaks):T>93.30Corp>2.0MPa

(forexampleCVCSletdown,SGBD)

Analyses:• T/H:RB,IB,AB:T,pandRH• DoseratesandTIDs:RB,AB(forexampleRHsump

recirculation),IB

Harshconditionssignificantlymoreseverethannormaloperatingconditions:

• Temperature:8,30C(150F)abovenormal/designT

• Pressure:10%abovenormal/design(10kPa– 1,47psi)

• RH:100%RHwithcondensation

• ChemicalSpray‐ exposure

• Submergence– exposure

• RadiationTID>100Gy;>10Gyforelectronics

NEKDBAEQconditions:

EQZoneMapsdocument

• EQconditionsdefinedforeveryevaluatedroom:

• DefinedHarsh/MildlocationsendcorrespondingenvelopingEQzone:

EQequipmentlist

EQMasterEquipmentList(EQMEL)components:• ElectricalandI&Cequipment:

• Safety‐related;• Non‐safety‐relatedthataffectssafety‐

related;• Certainpost‐accidentmonitoring(RG1.97

Category1in2)• LocatedinHarshenvironmentandperformDBA

safetyfunction

EQMELequipmentlist(typical):

‐Pumpselectricmotors,‐VAfancoolerselectricmotors‐MOVs‐Limitswitches‐Electricalpenetrations‐Pressuretransmitters(LT,PT,FT)‐RTDs,TCs‐Pressureswitches‐RMdetectors/monitors‐Solenoidvalves‐MCCDs‐H2recombiners (replacedwithPARs)‐Transformers,‐Selectorswitches

EQSupportingEquipmentList(EQSEL)– entirefunctionalloopshallbequalified

Typicalsupportingequipment:

• Cables– BIW,Rockbestos,Okonite,GeneralCable

• Wires– FWIIISIS,FLAMETROL• Heat‐shrinkin‐linecablesplices‐

TYCO/RAYCHEM• Terminalblocks– MARATHON• SealingTapes– Graphoil,Locktite• Connectors– EGSQualtech,Conax• SealingCompounds– DOW

CORNING,NAMCO

QualTech QDCconnector

Qualificationdocumentation– EQMS

• Testreports(EnvironmentalQualificationReport)

• NEKQualificationevaluations ‐ EPRIEQ managementSoftware (EQMS):

EQEnviroments

GQEPQE+SCEW

Qualificationdocumentation– EQMSPlantQualificationEvaluation Module(PQE):

ThermalAging– qualifiedlifecalculation:

PAOTprofilesareacomparison– margincalculation:

Otherqualificationdocuments:

EQblockdiagrams:

Otherqualificationdocuments:

EQWorkmanshipstandard (EQWS):

EQFieldConfigurationDrawings

EQFieldConfigurationPartsList

EQactivities: EQlabeling:Hotspots determination:• Temperature• Gammaandneutron

radiation

Controloverplantprocesses:‐ Designchanges‐ Preventive

Maintenance‐ Procurement

EQoverallprocess

QualificationInputs:

Qualification test report(Manufacturer/Model)

Equipment:‐ Location (Normal and

DBA environment)‐ Safety function‐ PAOT

Manufacturer/Model

EQMS qualification (PQE):

‐ Qualified Life‐ EQ configuration‐ EQ maintenance‐ Procurement

requirements

EQ Block Diagram

EQ Workmanship Standard‐ Configuration requirements

(orientation, sealing, etc.)‐ Maintenance requirements

(periodic replacement equipment or part, periodic inspections, etc.)

EQ Label,Plant Information system equipment EQ designation

(EQ=YES)

QualificationEvaluation:

QualificationOutputs:

EQgroupisinvolvedwheneverEQequipmentisaffected:1) Replaced,2) Modified,3) De‐installed4) NewEQequipmentinstalled5) Environmentalconditionsaffected

‐ EQ Master Equipment ‐ EQ Supporting Equipment

NEWQUALIFICATIONREQUIREMENTSUNDERDEVELOPMENT

SecondPeriodicSafetyReview(PSR2):

1. QualificationtoSevereAccidents– EquipmentSurvivabilityProgram

2. ActiveMechanicalEquipmentEnvironmentalQualification–MechanicalQualificationProgram

3. ElectromagneticCompatibilityQualification– EMCProgram

/27EQUIPMENTSURVIVABILITY(DEC)

REGULATIONS:

Slovenianlegislation:„Rulesonradiationandnuclearsafetyfactors“requiresEquipmentSurvivability(ES)assessmenttoshowthatthereisreasonableassurancethattheequipmentandinstrumentationusedtomitigateandmonitorDesignExtendedAccidentConditions(DEC).ActisinaccordancewithIAEA,WENRArequirements.

IAEASafetyStandardSSR‐2/1„SpecificSafetyRequirements“Requirement20‐ Designextensionconditions:„Thesedesignextensionconditionsshallbeusedtoidentifytheadditionalaccidentscenariostobeaddressedinthedesignandtoplanpracticableprovisionsforthepreventionofsuchaccidentsormitigationoftheirconsequences“.

WENRASafetyReferenceLevelsforExistingReactors(2014)IssueF‐ DesignExtensionofExistingReactors:„TherearetwocategoriesofDEC:• DECAforwhichpreventionofseverefueldamageinthecoreorinthespentfuel

storagecanbeachieved;• DECBwithpostulatedseverefueldamage“.„…DEChavethecapacityandcapabilityandareadequatelyqualifiedtoper‐formtheirrelevantfunctionsfortheappropriateperiodoftime …“

NEKWENRAapproach:

IAEAandWENRAplantstatesdefinesenvironmentalqualificationandequipmentsurvivability→NEKSafetyUpgradeProjects(SUP) requirements:

without

significant fuel

degradation

with core

Operational States

Design extension conditions

Normal operation (NO)

Anticipated operational occurrences

Design basisaccidents (DBA)

Accident conditions

DESIGNEXTENSIONCONDITIONSDECB

1) ThelimitingscenarioisSBOsequencewithPCFV,PAR actuation,mitigationactionsat24h:reactorcoredamage,Ex‐Vesselcorerelocation;AccidentmitigationscenariousingAHXinsevereaccident(spray,recirculationfromcontainmentsumpduringex‐vesselevent):conditionsinAB,IBbuildingatARHRequipment/pipinglocations

2) SGTR:radioactivereleasetoenvironment‐ conditionsinBB1,BB2,Yard3) SFPaccident:scenarioperIndustryGuidanceNEI12‐02‐ conditionsinFHB

EquipmentSurvivabilityElements

EquipmentSafetyFunctionandLocationAssessmentDECclassification:

• Detailedsafetyfunctiondescription‐ inwhichspecificplantstateequipmentwillbeused(normaloperation,abnormaloperation,DBA,DEC)– IfDECthancandidateforDECclassification

• Locationofequipment– isequipmentlocatedinHarshenvironment– IfYesthancandidateforDECclassification

• Temperature:8,30C(150F) abovenormal/designT• Pressure:10%abovenormal/design(10kPa– 1,47psi)• RH:100%RHwithcondensation• ChemicalSpray ‐ exposure• Submergence – exposure• Radiation TID>100Gy;>10Gyforelectronics

DECPAOTtimingisdetermined:1hour,1day,1month,1year

DECQualificationstandards:‐ ElectricalandI&C:IEEE323‐1974orlateredition,IEEEEQdaughterstandards(317,334,382,383,…)

‐ Mechanical:ASMEQME‐1,orqualificationofnon‐metallicmaterials

DEC A or DEC B

DECsystemsandqualification

Variouspost‐FukushimaSafetyUpgradeProjectsunderdevelopment:

• IndependentthirdDECDieselGeneratoradditionaltotwo100%redundantDBADGs– DECBequipment

• Floodprotectionupgrade• NewEmergencyControlRoominDECBunkeredBuilding• PassiveContainmentFiltering&Ventilationsystem(PCFV)– DECBequipment

• PassiveAutocatalyticSystem(PAR)– DECBequipment• Containmentaccidentinstrumentation‐ DECA&B• Variousinstrumentslocatedinsystemsincontainmentbuilding(includingnewneutronfluxinstrumentationchannels)– DECA&B

• IndependentsystemfortheRCSpressurerelief(alternatePORV)‐DECAsystem

• ReactorCoolantandContainmentalternatecooling(ARH‐ACI)systemDECA&B

• AlternateSIandAF(ASI,AAF)systemsDECA&B• AlternatecoolingoftheSFP(HeatExchangers,SpraySystem)– DECAsystems

EquipmentSurvivability(underdevelopment)performedtorequiredlevelofconditions(DECAorDECBconditions).

/27OTHER NEW QUALIFICATION PROGRAMS

ActiveMechanicalEquipmentQualification

• Newqualificationprogrambasedon:• EPRIEQReferenceManual• EPRINP‐3877QualificationofActiveMechanicalEquipmentforNuclearPlants

• NUREG0800StandardReviewPlanCh.3.11• RG1.100Rev.3(SEISMICQUALIFICATIONOFELECTRICALANDACTIVEMECHANICALEQUIPMENTANDFUNCTIONALQUALIFICATIONOFACTIVEMECHANICALEQUIPMENTFORNUCLEARPOWERPLANTS)endorsingASMEQME‐1(QualificationofActiveMechanicalEquipmentUsedinNuclearPowerPlants)

• MEQMELdevelopment:DBAandDECequipment;Safetyfunction;PAOT;Location(NormalandHarshenvironmentconditions)

• Qualificationassessment: Based onavailablequalificationtestreportsorbasedonevaluationofnon‐metallicmaterials(EPRIreportsandCurtissWrightPowerSuiteEQapplications)

• Documentationpackages(similarapproachasEQ);correctiveactions• Preservingqualifiedstatus:controlofmaintenance,modificationsandprocurementprocesses

/27OTHER NEW QUALIFICATION PROGRAMS

EMCQualificationProgram

• Newqualificationprogrambasedon:• USNRCRegulatoryGuide1.180

• Guidanceapplicabletoallnewsafetyrelatedsystemsormodificationstoexistingsafetyrelatedsystemscontaininganalog,digitalorhybrid(combined)electronicsequipment

• EPRITR‐102323• DetailedtechnicalreportprovidingdetailsfromhistoricalbackgroundtorecommendedgenericEMIsusceptibilityandemissionstestlevelstobeusedinestablishingequipmentelectromagneticcompatibilityfornuclearpowerplantapplications

• ProvidesdefinitionofequipmentunderEMCscope:• EMCzones:highemissions(E);sensitiveequipment(S)includingexclusionzones

• SRI&CequipmentlocatedinEMCzones• ProvidesguidelinesandpracticalexamplesforEMC‐relateddocumentation

• Zonemapping hasbeenperformedtocaptureanemissionprofileoftheselectedarea.

• Administrativemeasures– definesexclusionsareaforwelding,useofportabletransceivers

• Implementationofpracticalnoisereductiondesignconsiderations• Qualificationsprocessrequiredandstartedfornewequipment/systems(includingSUP)

NEARFUTURETASKS

• EQprogram/PlantLifeExtensionfrom40to60years(2023to2043)

• ElectricalPenetrationAssemblies,Cables,CableSplicesandothercommoditiesqualifiedlifeextension(ReanalysisperNUREG‐1801,qualificationtestingforlifeextension)

• Obsoleteequipment– newqualifications

• TocompleteEquipmentSurvivability• TocompleteMEQprogram• TocompleteEMCprogram

• PSR3???

Naslovnica

Thankyou!

peter.klenovsek@nek.si

www.nek.si

NEK EQ presentation

Overview of the NEK Equipment Qualification Programs2019/05/03 · • Operating Licence:40 ‐60...

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