1、Designation: C625 15 An American National StandardStandard Practice forReporting Irradiation Results on Graphite1This standard is issued under the fixed designation C625; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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. Scope*1.1 This practice covers information recommended for in-clusion in reports giving graphite irradiation results.2. Referen
3、ced Documents2.1 ASTM Standards:2E261 Practice for Determining Neutron Fluence, FluenceRate, and Spectra by Radioactivation TechniquesE525 Practice for Reporting Dosimetry Results on NuclearGraphite (Discontinued 2001) (Withdrawn 2001)33. Terminology3.1 Definitions:3.1.1 grade, ndesignation given a
4、material by a manufac-turer such that it is always reproduced to the same specifica-tions established by the manufacturer.4. Significance and Use4.1 The purpose of this practice is to identify sample andtest parameters that may influence graphite irradiation testresults. This practice should not be
5、construed as a requirementor recommendation that proprietary information be disclosed.4.2 Irradiation results on graphite include dimensionalchanges and changes in properties that are used in reactordesign. The irradiation data are reported in governmentdocuments, open literature publications, and a
6、re assembled intodata manuals for use by reactor designers.5. Sample Description5.1 Source,5.2 Grade or identifying sample number,5.3 Raw materials including filler, binder, additives, impreg-nants and their pretreatment, if not proprietary information,5.4 Forming process including the size and shap
7、e of parentstock, if not proprietary information,5.5 Heat treatment including graphitizing temperature, rateof heating and soak time, if not proprietary information.5.6 Purification, if not proprietary information,5.7 Sampling plan including location in parent stock, grainorientation, size, and shap
8、e of samples, and5.8 Pre-irradiation sample treatment including prestressing,annealing, or previous irradiation.6. Property Measurements6.1 MethodIndicate the method and accuracy of measure-ment and, if applicable, differences between pre- and post-irradiation measurements. Where applicable, give re
9、ference tostandards or guides that prescribe (or describe) the methodused.6.2 ResultsSpecify the number of samples represented orthe number of measurements per sample if mean values aregiven.6.3 Indicate other measurements taken but not reported.7. Irradiation Conditions7.1 Reactor and test position
10、s.7.2 Design of capsule, including materials of construction.7.3 Atmosphere to which samples were exposed.7.4 Thermal history including method of measurement orcalculation.7.5 Sample ConstraintIf applicable, indicate the type,magnitude and method of determining stress applied duringirradiation.7.6 D
11、osimetryRefer to Practices E261 and E525.7.7 Neutron FluenceNeutron spectrum and energy cut offutilized for neutron fluence calculation.7.8 Sample RecoveryReport the methods of recovery andtransfer, and the time between discharge and post-irradiationmeasurement of properties.1This practice is under
12、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 Oct. 1, 2015. Published November 2015. Originallyapproved in 1968. Last previous ed
13、ition approved in 2010 as C625 95 (2010).DOI: 10.1520/C0625-15.2For 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 websit
14、e.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18. Keywords8.1 graphite; irradiated
15、 properties; test resultsSUMMARY OF CHANGESSubcommittee D02.F0 has identified the location of selected changes to this standard since the last issue(C625 95 (2010) that may impact the use of this standard. (Approved Oct. 1, 2015.)(1) Added new Section 3, Terminology. (2) Revised subsection 6.1.ASTM
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