ASTM_D_7491_-_21.pdf

Designation:D749121Standard Guide forManagement of Non-Conforming Coatings in CoatingService Level I Areas of Nuclear Power Plants1This standard is issued under the fixed designation D7491;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 guide provides the user with guidance on develop-ing a program for managing non-conforming coatings inCoating Service Level I areas of a nuclear power plant.1.2 Non-conforming coatings include degraded qualified oracceptable coatings,unqualified coatings,unknown coatings,and unacceptable coatings.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was 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 Documents2.1 ASTM Standards:2D4538 Terminology Relating to Protective Coating andLining Work for Power Generation Facilities2.2 Other Documents:Regulatory Guide 1.54 Revision 0,Quality Assurance Re-quirements for Protective Coatings Applied to Water-Cooled Nuclear Power Plants3Regulatory Guide 1.54 Revision 1,Service Level I,II,andIII Protective Coatings Applied to Nuclear Power Plants3Regulatory Guide 1.54 Revision 2,Service Level I,II,andIII Protective Coatings Applied to Nuclear Power Plants3Regulatory Guide 1.54 Revision 3,Service Level I,II,andIII and In-Scope License Renewal Protective CoatingsApplied to Nuclear Power Plants3EPRI 1019157 Plant Support Engineering:Guideline onNuclear Safety-Related Coatings,Revision 2(formerlyTR109937 and 1003102)43.Terminology3.1 DefinitionsDefinitions for use with this guide areshown in Terminology D4538 or other applicable standards.4.Summary of Practice4.1 The process and use of this guide is summarized inFig.1.5.Significance and Use5.1 There are several methods for managing non-conforming coatings in an operating nuclear power plant.Thisguide outlines methods that have been determined to beacceptable to the nuclear industry.5.2 Managing the amount of non-conforming coatings iskey to ensuring the amount assumed,in the licensing bases isnot exceeded.5.3 EPRI Report 1019157 provides additional informationon the selection,application,inspection and maintenance ofnuclear plant safety-related protective coatings.This referenceoffers a detailed discussion of important considerations relatedto protective coatings and can be used to supplement this guideas deemed necessary.6.Establishing the Design Limit of Non-ConformingCoatings6.1 Determine what coatings do not meet the licensing basisfor the plant.For plants that have commitments to meetRegulatory Guide 1.54(applicable revision)or related ANSI/ASTM standards,or both,typically require DBA testing of1This guide is under the jurisdiction of ASTM Committee D33 on ProtectiveCoating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.10 on Protective Coatings Maintenance Workfor Power Generation Facilities.Current edition approved Feb.1,2021.Published February 2021.Originallyapproved in 2008.Last previous edition approved in 2015 as D7491 08(2015).DOI:10.1520/D7491-21.2For 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.3Available from U.S.Nuclear Regulatory Commission,Distribution ServicesSection,Washington,DC 205550001,http:/www.nrc.gov.4Available from EPRI Customer Fulfillment,1355 Willow Way,Suite 278,Concord,CA 94520.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.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.1FIG.1 Managing Non-Conforming CoatingsD7491 212coatings and extensive documentation associated with theapplication of the qualified coatings.This may be a moresignificant requirement to satisfy than for an older plant whichhas not made commitments to these requirements.6.2 The key to ensuring plant safety is to manage theamount of non-conforming coatings so that it does n