1、Designation:C117417Standard Practice forEvaluation of the Long-Term Behavior of Materials Used inEngineered Barrier Systems(EBS)for Geological Disposalof High-Level Radioactive Waste1This standard is issued under the fixed designation C1174;the number immediately following the designation indicates
2、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 addresses how various test methods anddat
3、a analyses can be used to develop models for the evaluationof the long-term alteration behavior of materials used inengineered barrier system(EBS)for the disposal of spentnuclear fuel(SNF)and other high-level nuclear waste in ageologic repository.The alteration behavior of waste forms andEBS materia
4、ls is important because it affects the retention ofradionuclides within the disposal system either directly,as inthe case of waste forms in which the radionuclides are initiallyimmobilized,or indirectly,as in the case of EBS containmentmaterials that restrict the ingress of groundwater or the egress
5、of radionuclides that are released as the waste forms degrade.1.2 Thepurposeofthispracticeistoprovideascientifically-based strategy for developing models that can beused to estimate material alteration behavior after a repositoryis permanently closed(that is,the post-closure period)becausethe timesc
6、ales involved with geological disposal precludedirect validation of predictions.1.3 This practice also addresses uncertainties in materialsbehavior models and the impact on the confidence in the EBSdesign criteria,the scientific bases of alteration models,andrepository performance assessments using
7、those models.Thisincludes the identification and use of conservative assumptionsto address uncertainty in the long-term performance of mate-rials.1.3.1 Steps involved in evaluating the performance of wasteforms and EBS materials include problem definition,labora-tory and field testing,modeling of in
8、dividual and coupledprocesses,and model confirmation.1.3.2 The estimates of waste form and EBS material perfor-mance are based on models derived from theoreticalconsiderations,expert judgments,and interpretations of dataobtained from tests and analyses of appropriate analogs.1.3.3 For the purpose of
9、 this practice,tests are categorizedaccording to the information they provide and how it is usedfor model development,support,and use.These tests mayinclude but are not limited to:accelerated tests,attribute tests,characterization tests,confirmation tests,and service conditiontests.1.4 This standard
10、 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 requirements prior to use.1.5 This international standard wa
11、s developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced D
12、ocuments2.1 ASTM Standards:2C859 Terminology Relating to Nuclear MaterialsC1285 Test Methods for Determining Chemical Durabilityof Nuclear,Hazardous,and Mixed Waste Glasses andMultiphase Glass Ceramics:The Product Consistency Test(PCT)C1682 Guide for Characterization of Spent Nuclear Fuel inSupport
13、of Interim Storage,Transportation and GeologicRepository DisposalE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE178 Practice for Dealing With Outlying ObservationsE583 Practice for Systematizing the Development of1This practice is under the jurisdiction of ASTM Committee C
14、26 on NuclearFuel Cycle and is the direct responsibility of Subcommittee C26.13 on Spent Fueland High Level Waste.Current edition approved July 1,2017.Published August 2017.Originallyapproved in 1991.Last previous edition approved in 2013 as C1174 07(2013).DOI:10.1520/C1174-17.2For referenced ASTM s
15、tandards,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 1942
16、8-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1(ASTM)Voluntary Consensus Standards for the Solutionof Nuclear and Other Complex Problems(Withdrawn1996)32.2 ANSI Standard:4ANSI/ASME NQA-1 Quality Assurance Program
