ML22040A338
| ML22040A338 | |
| Person / Time | |
|---|---|
| Site: | Hermes File:Kairos Power icon.png |
| Issue date: | 02/09/2022 |
| From: | Kairos Power |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML22040A336 | List: |
| References | |
| KP-NRC-2202-002 | |
| Download: ML22040A338 (7) | |
Text
Enclosure 1 Kairos Power Response to NRC Question s 2.5-1, 2.5-2, 2.5-3, and 2.5-4
(Non-Proprietary)
({J Kairos Power
QuestionNumber:2.5 1
Section2.5.3oftheapplicationrelies ontheinformationofClinch RiverEarlySitePermit applicationsearthquakecatalog,whichendsin2013.An updated(20132021) earthquake catalogshouldbeprovidedto demonstratethattheassumptionsandconclusionsinthe CRNPSHAremainvalid.
KairosPowerResponse:
Thepossible changesinearthquakeactivityintheHermes,andClinch RiverNuclear(CRN),
siteregionduringthe20132021periodrelativetotheCRNrateshavenotyetbeen finalized.ThePSARreflectsanassumptionthattheClinchRiverEarly SitePermitapplication earthquakecatalogisrepresentativeoftheseismicactivitytobeexpectedat theHermes site, basedonproximityto CRNandthefactthatrecentseismicactivityintheCentraland EasternUnitedStates (CEUS)sincethe2012MineralVirginiaearthquakeeventhasnot been significant.
Kairos Powerisnot requesting finalapprovalofaseismichazard designprofileforHermes aspartofthePSAR.The information providedissufficienttodeterminesuitablyofthesite fortheproposeduseofa testreactor.TheHermesOperatingLicenseApplicationwill reporttheseismichazardwithupdatedearthquakecatalogrecurrencerates.
Impacton LicensingDocument:
ThisresponsehasnoimpactonthecontentofPSARSection2.5.
References:
None
Page1of1
({J Kairos Power
QuestionNumber:2.5 2
ForSection2.5.4.3,howdoesKairosintendtodeterminethatthefoundationrock showsno evidenceofkarstic dissolution?
KairosPowerResponse:
Boringdataclosestto theproposedHermesreactor locationindicatesthetopofthe weathered rockisencounteredata depthofapproximately13.5ft.,andthetopofsound rock at a depthofapproximately30 ft.Theoverburdensoilsandtheweatheredrockwillbe excavated. Belowtheweatheredrock,soundbedrockrecoveredfromtheboringsdrilled showsnoevidenceoftheweakeningorweatheringthatisobservedintheinterfacecloser to thesurface.TheHermesfoundationwillbedeployedoveranengineeredcrushedstone orleanconcretefillplaced directlyoversoundrock. Theexcavationisplannedtoreachthe approximately30ftdepth,exposingthesurface ofthefoundationrocktoallowfor inspectionandsurface preparation.Theseactivities,boringdataandfoundationrock inspectionfollowingexcavation,willallowthedeterminationto bemade thatthe foundationrockshowsnoevidenceofkarsticdissolution.
ImpactonLicensingDocument:
ThisresponsehasnoimpactonthecontentofPSARSection2.5.
References:
None
Page1of1
({J Kairos Power
QuestionNumber:2.5 3
GeologiccrosssectionAA(Figure2.52)appearstobemissingtheMascotDolomite,which isshownonthemap(Figure2.51)butnot inthecrosssection.Provideanewcrosssection thatincludesallgeologicunitsshownonthesurfaceandencounteredinthesubsurface.
KairosPowerResponse:
Figure2.52hasbeenupdatedtoaddtheMascotDolomite,consistent withFigure 2.51.
Locationofinterfaces anddipsareindicated asapproximate.
ImpactonLicensingDocument:
ThePSARSection2.5Figure2.52,Subsurface ProfileAAhasbeen deleted andreplacedby theupdatedFigure2.52(attached).Thischange willbeincludedinafuture revisionto the PSAR.
References:
None
Page1of2 UPDATEDFIGURE2.5 2SubsurfaceProfileA A PROFILE A-A'
RESIDIUU M ROCK W eathered ELE V [ft] FILL L imestone SURFACE SOILS Fat cla y w/ rock Fragments 780 fragments Stiff to very Stiff B-5 770 N =10 to 20
760
750
740 = --' Om CT go 730
720
710 RESIDIUU M CLAY LI M ESTONE L imestone Fat C la y L ight Oliv e Gra y WEATHERED L ight Gra y V ery Soft LI M ESTONE N = 2 to 5
CLAY FILL o'<"' GEOLOGIC BOUNDARY p-, I
- Ops: Pond Springs Form at ion 0 50' 200'
~ CLAY FILL & GRAVEL - Om: Murfreesboro Limestone [HORIZONTAL ]
\\ - Oma: Mascot Dolomite LIMESTONE o"' p-, I
~ DOLOMITIC LIMESTONE - Unit interfaces and dips shown are 0 20' 50' approximate (Tennes see Geological
~ RESIDIUM CLAY Survey, 2015) [VERTICAL]
ALLUVIAL CLAY -~- GROUNDWATER TABLE (Approx imate )
RESIDIUM ROCK Information between borings is assumed lfil WEATHERED LIMESTONE and actual conditions may vary
Page2of2
({J Kairos Power
QuestionNumber2.54
GeologiccrosssectionBB(Figure2.53)showstheMascotDolomiteappearingto dipto thenorthwest.However,geologicmapsofthesiteshow allunitsatthesitelocation dipping to thesoutheast(seeGeologicMapoftheElvertonQuadrangle,TennesseeGeological Survey,2015).PleaseconfirmthecorrectdipdirectionoftheMascotDolomiteandprovide a newcrosssectionthatshowsthecorrectdipifneeded.
KairosPowerResponse:
An updatetoFigure 2.53isprovidedshowingthedipoftheinterfaceconsistentwiththe ElvertonQuadrangle(Reference1).Figure 2.53hasbeenupdated tobeconsistent with Figure2.51andtheReference1geologicmap.Thelocationofinterfacesanddipsare indicatedasapproximateandconsistentwithReference1.
ImpactonLicensingDocument:
ThePSARSection2.5Figure2.53,Subsurface ProfileBBhas beendeletedandreplacedby theupdatedFigure2.53(attached).Thischange willbeincludedinafuture revisionto the PSAR.
References:
- 1. PSARSection2.5.6Reference4,Limiszki,P.,"GeologicMapoftheElvertonQuadrangle, Tennessee,"TennesseeGeologicSurvey.2015.
Page1of2 UPDATEDFIGURE 2.5 3SubsurfaceProfileBB
PROFILE B-B'
ELE V [ft]
780
770
760
750
740
730
720
710
700
690
RESIOIUU M CLAY Oma DO LOMIT E Ops LI MESTONE Fat Cla y light Oli v e Gra y Light Olive Gra y Ve ry Soft { assume d )
N=2to5
R"' GEOLOGIC BOUNDARY o \\ - Ops: Pond Springs Formation
- Om : Mu rfreesboro Limestone Ill CLAY FILL - Oma : Mascot Dolomite
~ CLAY FILL & GRAVEL o"' - Unit interfaces and dips shown are 0 50' 200' approx imate (Tennessee Geo log ica l [ HOR IZ ON TAL]
Ill LIMESTONE Survey, 2015)
~ DOLOMITIC LIMESTONE -*-GROUNDWATER TABLE 0 20' 50'
~ RESIDIUM CLAY (Approx imate) [VERTICAL ]
Ill ALLUVIAL CLAY RESIDIUM ROCK Information betw een borings is assumed LJ WEATHERED LIMESTONE and actual conditions may vary
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