Designation:D7301−21StandardSpecificationforNuclearGraphiteSuitableforComponentsSubjectedtoLowNeutronIrradiationDose1ThisstandardisissuedunderthefixeddesignationD7301;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstheclassification,processing,andpropertiesofnucleargradegraphitebilletswithdimen-sionssufficienttomeetthedesigner’srequirementsforreflec-torblocksandcoresupportstructures,inahightemperaturegascooledreactor.Thegraphiteclassesspecifiedherewouldbesuitableforreactorcoreapplicationswhereneutronirradia-tioninduceddimensionalchangesarenotasignificantdesignconsideration.1.2Thepurposeofthisspecificationistodocumenttheminimumacceptablepropertiesandlevelsofqualityassuranceandtraceabilityfornucleargradegraphitesuitableforcompo-nentssubjectedtolowirradiationdose.NucleargraphitesmeetingtherequirementsofSpecificationD7219arealsosuitableforcomponentssubjectedtolowneutronirradiationdose.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C561TestMethodforAshinaGraphiteSampleC781PracticeforTestingGraphiteMaterialsforGas-CooledNuclearReactorComponentsC838TestMethodforBulkDensityofAs-ManufacturedCarbonandGraphiteShapesC1233PracticeforDeterminingEquivalentBoronContentsofNuclearMaterialsD346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD2638TestMethodforRealDensityofCalcinedPetroleumCokebyHeliumPycnometerD4175TerminologyRelatingtoPetroleumPro...
