ML22231B230

Kairos Power LLC, Reponses to NRC Requests for Confirmation of Information Hermes Preliminary Safety Analysis Report, Section 9.1

ML22231B230
Person / Time
Site:	Hermes File:Kairos Power icon.png
Issue date:	08/19/2022
From:	Kairos Power
To:	Office of Nuclear Reactor Regulation
Shared Package
ML22231B228	List: ML22231B229 ML22231B230
References
KP-NRC-2208-007
Download: ML22231B230 (3)

Text

KP-NRC-2208-007 Response to PSAR 9.1 RCI (Non-Proprietary)

1of2 KairosPowerHermesTestReactor PreliminarySafetyAnalysisReport ResponsestoRequestsforConfirmatoryInformation

ChemistryControlSystem RCI01 KPFHRPDC70,"Reactorcoolantpuritycontrol,"requiresthesystemtomaintainthepurityofthereactor coolantwithinspecifieddesignlimits.

InordertodemonstratehowthedesignbasesforthechemistrycontrolsystemsatisfyPDC70,confirm thefollowinginformationforSection9.1.1:

WillinformationintheFSARshowtheselectedlocation(s)forcoolantchemistrysamplingtobeawell mixed,representativesampleofthecoolant?

KairosPowerResponse:

Yes,informationprovidedwiththeapplicationforanoperatinglicensewillshowtheselectedlocation(s) forcoolantchemistrysamplingtobewellmixed,representativesamplesofthecoolant.

InertGasSystem RCI02 KPFHRPDC70,"Reactorcoolantpuritycontrol,"requiresthatcoolantpuritylimitsbebasedon considerationofairormoistureingressduetoacovergasleak.

Inordertodemonstratehowthedesignbasesfortheinertgassystem(IGS)satisfyPDC70,confirmthe followinginformationforSection9.1.2:

WilltheIGSbecapableofmeasuringbothairandmoisturecontentofthecovergas?

KairosPowerResponse:

Yes,theIGSwillbecapableofmeasuringboththeairandmoisturecontentofthecovergas.

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RCI03 KPFHRPDC70,"Reactorcoolantpuritycontrol,"requiresthatcoolantpuritylimitsbebasedon considerationofairormoistureingressduetoacovergasleak.

Inordertodemonstratehowthedesignbasesfortheinertgassystem(IGS)satisfyPDC70,confirmthe followinginformationforSection9.1.2:

CantheentiretyoftheIGSbeperiodicallycheckedforleakage?

KairosPowerResponse:

Yes,theentiretyoftheIGScanbeperiodicallycheckedforleakage.

RCI04 InordertoclarifythedesignbasesoftheIGS,confirmthefollowinginformationforSection9.1.2:

IstheIGSneededtocontrolthe'hotcell'temperaturestatedinChapter13,TableA51,"KeyInput ParametersforPebbleHandlingandStorageSystemMalfunctionEvent?"

KairosPowerResponse:

No,theIGSisnotneededtocontrolthehotcelltemperaturereferencedintheanalysisofthePHSS MalfunctionEvent.