ObjectiveProvide a simple, highly robust solution that possesses the following features:

• SevereAccident/StationBlackout(SBO)survivability

• Remoteelectronicoperation-upto1000feet

• Continuous,accuratereadingsgreaterthan1”resolution

• Simpleandflexibleinstallation–nopenetrationstoSFPliner orunderwatermodifications

• LowMaintenance–singlecable,nosensordriftovertime

• In-situfunctionaltests

• MeetsorexceedsUSNRCEA-12-051,JLD-ISG-2012-03,and NEI12-02requirements

• Optionaltemperaturesensorformonitoringandtrending

Features • ProprietaryTimeDomainReflectometry(TDR)technology

• Twochannelsof1EqualifiedNUMACelectronicswithqualified 1Esoftware

• NUMACelectronicscanbelocatedupto1000feetfromSFP

• Configurablealarms -3pre-setwaterlevelalarms -Suddenlossofcoolinginventoryalarm

-Optionalhightemperaturealarm

• Optionalcapabilitytointerfacewithplantcomputer

• Trendingdisplays–plotwaterleveland/ortemperature

• CommercialEthernet-basedwirelesscompatibility

• Reliablepowermanagement -40Wattsoperatingpower -25Wattsoperatingpowerindisplay“Sleep”mode -“OnDemand”operationforextendedbatteryoperation -72hourexternalbatterypower/UPScapability

• Passivesensor–nomovingpartsorelectronicsinSFParea

• Robuststainlesssteel,heavy-wallprobelargelyimperviousto temperature,radiation,saturationandcorrosionassociatedwith severeaccidentconditions

• Single,~0.5”diameterlow-losscoaxialcable–nocomplexwiring; simple,flexiblerouting

NUMAC QualificationSeismic(IEEEStd344),Environmental(IEEEStd323)5°Cto50°C,EMC (EPRITR-102323-R3).

AllNUMACelectronicassembliesmeetIPC-610requirements.

factsheet

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SafetyEnhancementSpentFuelPoolLevelMonitor

The Spent Fuel Pool Level Monitor (SFPLM) is a robust liquid-level measurement system that provides accurate measurement of the Spent Fuel Pool (SFP) water level with NUMAC electronics located up to 1000’ from the SFP.

Our Commitment

Quality: GEHitachiNuclearEnergy(GEH)worksinaccordancewiththeUnitedStatesNRCacceptedGEHQualityAssuranceProgramDescriptionthatisineffectatthetimeworkisperformed,andinaccordancewiththeGEHISO-9001QualityManagementSystemDescription,asapprovedbyourISOregistrar

NUMAC SFPLM Chassis

•Narrow(nsec)PulseGeneration •ReflectedPulsedTMeasurement •DisplayWaterLevel1000ft.Low-LossCable

(inconduit)

ShortProbe CalibrationCable

GEHitachiNuclearEnergy

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©2012GEHitachiNuclearEnergyAmericasLLC.AllRightsReserved.

NUMAC InstrumentationTheNUMACSpentFuelPoolLevelMonitor(SFPLM)Systemconsistsoftwo(2)channelsof19”rack-mountedNUMACchassis,two(2)stainlesssteelpassiveprobes,andtwo(2)interfacecoaxialcables.

SFPLM Standard Features • ProprietaryTDRImpulsegeneratorandhighspeed discriminatorsforreflectedpulses–providescontinuouslevel measurement with high signal to noise ratio and high accuracy(<1inch).Electronicscanbelocatedinacontrolled environmentupto1000ftfromtheSFP.Nopost-installation sensorcalibrations.

• AutomaticbatterybackuponlossofACpowerprovidesupto 72hoursofoperation.Estimatedbatterycapacityremaining availableondisplay.

• LeveragestheNUMACSafety-RelatedOperatingSystem, includingwatchdogtimerstoguardagainstfaultyinputsand commonmodefailures.

• Built-inSelf-Testsystemmaximizeschannelavailabilityby detectingandannunciatingsystemfailuresin<1minute.

• DisplayscreensareNUREG0711HumanFactorsEngineered. Primaryinformationavailableonmaindisplaywithsoft-keys fortrenddisplays,diagnostics,surveillance,anduserhelp. Configurablealarmsandotherparametersarestoredinnon- volatilememorywithkey-lockandpasswordaccesscontrol.

• Digitalaccuracyforwaterlevel,lowdrift,and24month surveillanceintervals.Calibration/Surveillancefunctionsare controlledfromthefrontpanelwithoutdisconnectingcables orprobinginternalcircuits.

SFPLM Standard Features (continued) • Relayoutputs(Form-C)forwaterlevel,temperature,loss-of- inventoryalarmsareadjustable,plusanINOP/Trouble notificationalarmisincluded.

• Outputsforextendedmonitoringrange:

- Ethernetoutputprovidessystemparametersandvaluesforremote monitoringanddatastorage,andiscapableofinterfacingwithan 802.11wirelessrouter(transmit-onlyprotocol)

- Outputforlevelconfiguredfor0-10V,0-1V,or4-20mA

SFPLM Optional Enhancements • Optionalfuelpooltemperaturemeasurementwithdigital readoutsdisplayedonthefrontpanel,and0-10V,0-1V, or4-20mAoutput

• Optionalmulti-probecalibrationenablesinterchangeable electronicsforadditionalflexibility

• Optionalportableelectronicspackagingthatsatisfies“partial portability”guidanceasdescribedinNEI12-02,Revision1,Sect3.1

SFPLM Dimensions & Connections4U(EIAstandard)19”wideX7”highrack-mountchassisweighing32.5lbs.Chassis,retentionfasteners,andtopcoverareseismically-qualified.Connectorbracketinrearofchassisinterfacesallelectricalsignals.RetractorarmprovidescableroutingbehindNUMACchassisforfieldcabling.

SFPLM Power120VAC(90-132VAC),50-60Hertz,<40Watts,Eachchannelincludesaself-containedback-up24VDCsourcecapableofSFPLMoperationfor72hours.Thisutilizesa120VACpowersupplyanda24VDCpowersupplywhichareauctioned.The24VDCUPS(UninterruptiblePowerSupply)consistsofabattery,tricklecharger,andmonitoringcircuit.

Minimization of Obsolescence IssuesLeveragesindustry-standardNUMACdesign.1100+NUMACchassisinoperationwithover16,000yearsofoperationalexperience.GEHiscommittedtoprovidespareparts,trainingandeaseofmaintenancetominimizeobsolescenceconcerns.

TheSFPLMsharesmanycommoncomponentssuchaschassis,frontpanel,powersupplies,andelectronicmoduleswithotherNUMACfamilymemberstherebyfacilitatingsparesprovisioning.

NUMACobsolescenceismanagedatthecardlevel,minimizingtheimpactoftechnologychanges.Newcardsmanufacturedtodaymaintaincompatibilitywithexistinginstallations.ThisallowsGEHtocontinuesupportingtheNUMACChassisinstalledasfarbackas1985withoutrequiringasystemlevelchangeout.