1、Designation:D 5962 96(Reapproved 1999)Standard Guide forMaintaining Unqualified Coatings(Paints)Within Level IAreas of a Nuclear Power Facility1This standard is issued under the fixed designation D 5962;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide is intended to assist the maintenance engi-neer in the preparation of a specifica
3、tion or work instruction forre-coating items that are presently coated with what is knownwithin the nuclear power industry as an“unqualified coating.”2.Referenced Documents2.1 ASTM Standards:D 610 Test Method for Evaluating Degree of Rusting onPainted Steel Surfaces2D 714 Test Method for Evaluating
4、Degree of Blistering ofPaints3D 772 Test Method for Evaluating Degree of Flaking(Scal-ing)of Exterior Paints3D 1186 Test Methods for Nondestructive Measurement ofDry Film Thickness of Nonmagnetic Coatings Applied toa Ferrous Metal Base3D 3359 Test Methods for Measuring Adhesion by TapeTest3D 4227 Pr
5、actice for Qualification of CoatingApplicators forApplication of Coatings to Concrete Surfaces2D 4228 Practice for Qualification of CoatingApplicators forApplication of Coatings to Steel Surfaces2D 4537 Guide for Establishing Procedures to Qualify andCertify Inspection Personnel for Coating Work in
6、NuclearFacilities2D 4541 Test Method for Pull-Off Strength of CoatingsUsing Portable Adhesion Testers22.2Other Standards:SSPC-SP 1 Solvent Cleaning Issued by Steel StructurePainting Council4SSPC-SP 3 Power Tool Cleaning Issued by Steel StructuresPainting Council4SSPC-SP 11 Power Tool Cleaning to Bar
7、e Metal as Issuedby Steel Structures Painting Council43.Terminology3.1 Definitions:3.1.1 unqualified coating or painta coating or coatingsystem that cannot be attested to having passed the requiredlaboratory testing,including irradiation and simulated DesignBasisAccident(DBA)or lacks adequate qualit
8、y documentationto support its use as qualified.3.1.2 design basis accident(DBA)a generic term for anyone of a family of accident conditions that can result frompostulated events.3.1.2.1 DiscussionThese conditions are generally associ-ated with the rupture of high energy piping.The most com-monly rec
9、ognized accident conditions used to evaluate coatingsystems for primary containment,are the LOCA or MainSteam Pipe Break.3.1.3 LOCAloss of coolant accident.3.1.4 SAR(Safety Analysis Report)the document of anuclear power plant that maintains licensability.4.Summary of Guide4.1 This guide is summarize
10、d in Table 1,which shows thesteps in the recoating sequence necessary for adequate protec-tion of an unqualified coated item.4.2 In order to use this guide,conditions such as tempera-ture,relative humidity,etc.under which the new coating mustperform during normal operating conditions must be knownan
11、d considered.5.Significance and Use5.1 There are different methods for maintaining unqualifiedcoatings in an operating nuclear power plant.This guideoutlines a method that has been found to be acceptable to theindustry and,when followed,will not affect the safety of thenuclear plant.5.2 There are se
12、veral prerequisites prior to any coating workin coating service Level 1 areas(Quality Class 1).They are asfollows:5.2.1 Coating applicator shall be qualified in accordancewith Practices D 4227 and D 4228,or the qualification require-ments of the utility.5.2.2 The amount of unqualified coating shall
13、have beeninventoried and identified prior to the re-coat work activity.5.2.3 The practice of maintaining unqualified coating with abetter or equal grade of unqualified coating is acceptable to the1This guide is under the jurisdiction of ASTM Committee D-33 on ProtectiveCoating and Lining Work for Po
14、wer Generation Facilities and is the directresponsibility of Subcommittee D33.10 on Protective Coatings Maintenance Workfor Power Generation Facilities.Current edition approved June 10,1996.Published August 1996.2Annual Book of ASTM Standards,Vol 06.02.3Annual Book of ASTM Standards,Vol 06.01.4Avail
15、able from Steel Structure Painting Council,4516 Henry Street,Suite 301,Pittsburgh,PA 15213-3728.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMutility and in agreement with the utilities SAR.5.2.
16、4 The amount of square footage or weight,or both,ofunqualified coating committed to in the utilities SAR,shall notbe exceeded.NOTE1Existing components in coating service Level 1 areas mayhave been originally installed having unqualified coatings.Should theneed arise to replace these items,every effort shall be made to utilizequalified coating systems applied within the vendors shop or prior toplacement within the plant.5.2.5 Inspector shall be qualified in accordance with Prac-tice D 4537 or the