ML24011A292

Kairos Power LLC, Preliminary Safety Analysis Report, Chapter 9

ML24011A292
Person / Time
Site:	Hermes  File:Kairos Power icon.png
Issue date:	01/11/2024
From:	Kairos Power
To:	Office of Nuclear Reactor Regulation
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ML24011A290	List: ML24011A291 ML24011A292
References
KP-NRC-2401-004
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PreliminarySafetyAnalysisReport AuxiliarySystems

9.6 POSSESSIONANDUSEOFBYPRODUCT,SOURCE,ANDSPECIALNUCLEARMATERIAL Specialnuclearmaterial(SNM),source,andbyproductmaterialwillbepresentatthereactorfacility.

Theapplicablerequirementsin10CFRPart30,10CFRPart40,and10CFRPart70maybesatisfiedusing contentcontainedwithinthisConstructionPermitApplication.However,materiallicense(s)arenot beingrequestedatthistimeandnecessarylicenseapplication(s)oramendmentswillbesubmittedata futuredate.ThissectiondescribesthesystemsthatinteractwithSNM,source,orbyproductmaterial, andthedesignbasisforthosesystemstopreventuncontrolledreleaseofradioactivematerialsandto maintainpersonnelexposurelimitswithin10CFRPart20doselimitsandaslowasreasonably achievable(ALARA)objectives.AdditionalinformationonALARApracticesisdiscussedinChapter11.

Spacesinwhichthematerialsarehandledandequipmentusedtohandlethematerial,aresubjectto administrativecontrolstominimizecontamination,topreventradiologicalsabotage,theftordiversion, andtopreventuncontrolledreleaseofthematerials.Adescriptionoftheadministrativeprocedures relatedtouseofbyproduct,source,andspecialnuclearmaterialwillbeprovidedintheapplicationfor anOperatingLicense.

WastefromSNM,sourcematerial,orbyproductmaterialishandledthroughtheradioactivewaste managementprogramdescribedinSection11.2.1.Theradioactivewastehandlingsystemalsohandles drainsandventsforthefacilityincludinghandlingofcontaminatedliquidscollectedbythedrainsystem (seeSection11.2.2).

9.6.1 SpecialNuclearMaterial SNMisreceivedandusedatthefacilityintheformoffreshfuelparticlescontainedinpebbles(see Section9.3).FuelpebblescontainingSNMusehighassay,lowenricheduranium(lessthan20%

enrichment)atdifferentenrichmentlevels.

SNMishandledinthefuelintakearea,thePHSS,andthereactorvessel.Intheintakearea,SNMis managedbycompliancewith10CFRPart70,bytheuseoffreshfuelcanistersandbythenatureofthe pebbledesign,inwhichtheSNMisencapsulatedinagraphitesubstrate.Section9.3andChapter4 describehowthePHSSandthereactorvessel,respectively,preventuncontrolledreleasesofradioactive material.Ofthesystemsdescribedinthisparagraph,onlythefreshfuelhandlingareashavethe potentialfordirectcontactwiththeSNMduringnormaloperation.Atthislocation,theactivityofthe freshfuelisverylowandadministrativeproceduresthatminimizecontactwiththefreshfuelare sufficientinsupportofALARApractices.InthePHSS,spentfuelishandledincanistersandshieldingis usedtosupportALARApractices.

9.6.2 SourceMaterial Sourcematerialthatcontainsunenricheduraniumisalsoreceivedandusedatthefacilityintheformof unenrichedfuelparticlescontainedinfuelpebbles.Handlingoffuelpebblescontainingsourcematerial iswithinthesamesystemsasthepebblesthatcontainSNM.Sourcematerialismanagedbycompliance with10CFRPart40,byuseoffreshandspentfuelcanisters,andbythenatureofthepebbledesign,in whichthesourcematerialisencapsulatedinagraphitesubstrate.

9.6.3 ByproductMaterial ByproductmaterialsarebothusedinandgeneratedtosupportoperationoftheKPFHR.

Tritiumisgeneratedatthefacilityandisclassifiedasbyproductmaterial.Tritiumisgeneratedasaresult ofthenuclearreactioninthecore.ItispossiblefortTritiumtobeispresentthroughouttheprimary, intermediate,andpowergenerationsystems,andinthegraphitecoreoffuelpebbles.Becausethe

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