ASTM_C_781_-_08_2014.pdf

Designation:C78108(Reapproved 2014)An American National StandardStandard Practice forTesting Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components1This standard is issued under the fixed designation C781;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the test methods for measuring theproperties of graphite and boronated graphite materials.Theseproperties may be used for the design and evaluation ofhigh-temperature gas-cooled reactor components.1.2 The test methods referenced herein are applicable tomaterials used for replaceable and permanent components asdefined in Section 7 and Section 9,and includes fuel elements;removable reflector elements and blocks;permanent sidereflector elements and blocks;core support pedestals andelements;control rod,reserve shutdown,and burnable poisoncompacts;and neutron shield material.1.3 This practice includes test methods that have beenselected from existing ASTM standards,ASTM standards thathave been modified,and newASTM standards that are specificto the testing of materials listed in 1.2.Comments on individualtest methods for graphite and boronated graphite componentsare given in Sections 8 and 10,respectively.The test methodsare summarized in Tables 1 and 2.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC561 Test Method for Ash in a Graphite SampleC577 Test Method for Permeability of RefractoriesC611 Test Method for Electrical Resistivity of ManufacturedCarbon and Graphite Articles at Room TemperatureC625 Practice for Reporting Irradiation Results on GraphiteC651 Test Method for Flexural Strength of ManufacturedCarbon and GraphiteArticles Using Four-Point Loading atRoom TemperatureC695 Test Method for Compressive Strength of Carbon andGraphiteC709 Terminology Relating to Manufactured Carbon andGraphiteC747 Test Method for Moduli of Elasticity and FundamentalFrequencies of Carbon and Graphite Materials by SonicResonanceC749 Test Method for Tensile Stress-Strain of Carbon andGraphiteC769 Test Method for Sonic Velocity in ManufacturedCarbon and Graphite Materials for Use in ObtainingYoungs ModulusC816 Test Method for Sulfur in Graphite by Combustion-Iodometric Titration MethodC838 Test Method for Bulk Density of As-ManufacturedCarbon and Graphite ShapesC1039 Test Methods for Apparent Porosity,Apparent Spe-cific Gravity,and Bulk Density of Graphite ElectrodesC1179 Test Method for Oxidation Mass Loss of Manufac-tured Carbon and Graphite Materials in AirC1233 Practice for Determining Equivalent Boron Contentsof Nuclear MaterialsC1274 Test Method for Advanced Ceramic Specific SurfaceArea by Physical AdsorptionD346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD1193 Specification for Reagent WaterD2854 Test Method for Apparent Density of ActivatedCarbonD2862 Test Method for Particle Size Distribution of Granu-lar Activated CarbonD3104 Test Method for Softening Point of Pitches(MettlerSoftening Point Method)1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.F0 on Manufactured Carbon and Graphite Products.Current edition approved May 1,2014.Published July 2014.Originally approvedin 1977.Last previous edition approved in 2008 as C781 08.DOI:10.1520/C0781-08R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D4292 Test Method for Determination of Vibrated BulkDensity of Calcined Petroleum CokeD5600 Test Method for Trace Metals in Petroleum Coke byInductively Coupled Plasma Atomic Emission Spectrom-etry(ICP-AES)D7219 Specification for Isotropic and Near-isotropicNuclear GraphitesE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE132 Test Method for Poissons Ratio at Room TemperatureE228 Test Method for Linear Thermal Expansion of SolidMaterials With a Push-Rod DilatometerE261 Practice for Determining Neutron Fluence,FluenceRa