Designation:D7301−11(Reapproved2015)AnAmericanNationalStandardStandardSpecificationforNuclearGraphiteSuitableforComponentsSubjectedtoLowNeutronIrradiationDose1ThisstandardisissuedunderthefixeddesignationD7301;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstheclassification,processing,andpropertiesofnucleargradegraphitebilletswithdimen-sionssufficienttomeetthedesigner’srequirementsforreflec-torblocksandcoresupportstructures,inahightemperaturegascooledreactor.Thegraphiteclassesspecifiedherewouldbesuitableforreactorcoreapplicationswhereneutronirradia-tioninduceddimensionalchangesarenotasignificantdesignconsideration.1.2Thepurposeofthisspecificationistodocumenttheminimumacceptablepropertiesandlevelsofqualityassuranceandtraceabilityfornucleargradegraphitesuitableforcompo-nentssubjectedtolowirradiationdose.NucleargraphitesmeetingtherequirementsofSpecificationD7219arealsosuitableforcomponentssubjectedtolowneutronirradiationdose.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.2.ReferencedDocuments2.1ASTMStandards:2C559TestMethodforBulkDensitybyPhysicalMeasure-mentsofManufacturedCarbonandGraphiteArticlesC709TerminologyRelatingtoManufacturedCarbonandGraphiteC781PracticeforTestingGraphiteandBoronatedGraphiteMaterialsforHigh-TemperatureGas-CooledNuclearRe-actorComponentsC838TestMethodforBulkDensityofAs-ManufacturedCarbonandGraphiteShapesC1233PracticeforDeterminingEquivalentBoronContentsofNuclearMaterialsD346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD2638TestMethodforRealDensityofCalcinedPetroleumCokebyHeliumPycnometerD7219SpecificationforIsotropicandNear-isotropicNuclearGraphitesIEEE/ASTMSI10AmericanNationalStandardforUseoftheInternationalSystemofUnits(...
