1、Designation:E125313Standard Guide forReconstitution of Irradiated Charpy-Sized Specimens1This standard is issued under the fixed designation E1253;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
2、parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers procedures for the reconstitution offerritic pressure vessel steels used in nuclear power plantapplications,Type A Charpy(Test Meth
3、ods E23)specimensand Charpy-sized specimens suitable for testing in three pointbending in accordance with Test Methods E1921 or E1820.Materials from irradiation programs(principally broken speci-mens)are reconstituted by welding end tabs of similar materialonto remachined specimen sections that were
4、 unaffected by theinitial test.Guidelines are given for the selection of suitablespecimen halves and end tab materials,for dimensionalcontrol,and for avoidance of overheating the notch area.Acomprehensive overview of the reconstitution methodologiescan be found in Ref(1).21.2 The values stated in SI
5、 units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 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 pra
6、ctices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3E23 Test Methods for Notched Bar Impact Testing of Me-tallic MaterialsE185 Practice for Design of Surveillance Programs forLight-Water Moderated Nuclear Power Reactor VesselsE220
7、Test Method for Calibration of Thermocouples ByComparison TechniquesE1820 Test Method for Measurement of Fracture ToughnessE1921 Test Method for Determination of ReferenceTemperature,To,for Ferritic Steels in the TransitionRangeE2215 Practice for Evaluation of Surveillance Capsulesfrom Light-Water M
8、oderated Nuclear Power Reactor Ves-sels3.Significance and Use3.1 Practice E185 defines the minimum requirements forlight-water reactor surveillance program Charpy V-notch speci-mens and Practice E2215 describes the evaluation of testspecimens from surveillance capsules.It may be desirable toextend t
9、he original surveillance program beyond availablespecimens for plant aging management issues,such as plantlicense renewal,to better define existing data,or to determinefracture toughness of a material when no standard fracturetoughness test specimens are available.The ability to reconsti-tute the br
10、oken halves of existing specimens can provide suchdata.3.2 Charpy-sized specimens are typically machined fromvirgin material,that is,material not previously mechanicallytested.There are occasions that exist when either(1)no fullsize specimen blanks are available or(2)the material availablewith the d
11、esired history(such as having been subjected toirradiation)is not sufficient for the machining of full-sizespecimens,or both.3.3 An solution to this problem,which is addressed in thisguide,is to fabricate new specimens using the broken halves ofpreviously irradiated and tested specimens or other mat
12、erialirradiated for this purpose.In this guide,the central segment ofeach new specimen utilizes a broken half of a previously testedspecimen and end tabs that are welded to the central segment,or the central section may simply be a piece of virgin materialshorter than a Charpy-sized specimen.While s
13、pecificallyaddressing reconstitution of irradiated pressure vessel steels,this guide can also provide guidance for reconstitution ofCharpy-sized specimens for other situations involving materialavailability.4.Reconstitution Technique4.1 Welding Process:4.1.1 Any welding process may be chosen,provide
14、d that theheat input and dimensional constraints,as prescribed in this1This guide is under the jurisdiction of ASTM Committee E10 on NuclearTechnology and Applicationsand is the direct responsibility of SubcommitteeE10.02 on Behavior and Use of Nuclear Structural Materials.Current edition approved J
15、an.1,2013.Published January 2013.Originallyapproved in 1993.Last previous edition approved in 2007 as E1253-07.DOI:10.1520/E1253-13.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcon
16、tact 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 guide,can be achieved.Work to date has indicated successfulresults with stud welding(2),electron beam welding(3,4),projection welding(5),and laser welding(6).4.2 Specimen Preparation:4.2.1 The specimen insert used for reconstitu