ASTM_D_4082_-_10.pdf

Designation:D408210Standard Test Method forEffects of Gamma Radiation on Coatings for Use in NuclearPower Plants1This standard is issued under the fixed designation D4082;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 test method covers a standard procedure for evalu-ating the lifetime radiation tolerance of coatings to be used innuclear power plants.This test method is applicable to CoatingService Levels I,II,and III.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2D659 Method for Evaluating Degree of Chalking of ExteriorPaints(Withdrawn 1990)3D660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Method for Evaluating Degree of Cracking ofExterior PaintsD714 Test Method for Evaluating Degree of Blistering ofPaintsD772 Test Method for Evaluating Degree of Flaking(Scal-ing)of Exterior PaintsD4538 Terminology Relating to Protective Coating andLining Work for Power Generation FacilitiesD5139 Specification for Sample Preparation for Qualifica-tion Testing of Coatings to be Used in Nuclear PowerPlants3.Terminology3.1 DefinitionsDefinitions for use with this Test Methodare shown in Terminology D4538 or other referenced stan-dards.4.Significance and Use4.1 This test method is designed to provide a uniform test toassess the suitability of coatings,used in nuclear powerfacilities,under radiation exposure for the life of the facilities,including radiation during a DBA(Coating Service Level Iareas only).Specific plant radiation exposure may exceed or beless than the amount specified in 7.2 of this standard.Ifrequired by the licensee design basis,the gamma dose usedmay exceed the actual anticipated plant gamma dose to accountfor beta dose.Coatings in Level II and III areas(outsideprimary containment)are expected to be exposed to loweraccumulated radiation doses.5.Preparation of Test Samples5.1 Steel PanelsPanels shall be prepared in accordancewith Specification D5139 or as approved by the licensee.5.2 Concrete BlocksBlocks shall be prepared in accor-dance with Specification D5139 or as approved by the licensee.6.Sampling6.1 Prepare and test specimens at least in duplicate,or asotherwise specified by the licensee.7.Procedures7.1 Irradiation Dose Rate:7.1.1 Make the gamma energy field at the position of the testspecimen 1 106rads/h,or greater,unless otherwise specifiedby the licensee.It shall be uniform to within 10%from oneposition of the specimen to another.7.1.2 Make provisions so that all areas receive the sameaverage exposure and dose,if the specimen is irradiated by anonuniform source.7.1.3 Determine the dose rate by a procedure acceptable tothe coating manufacturer or as otherwise specified by thelicensee.7.2 Irradiation Accumulated DoseMake the total irradia-tion accumulated dose 1 109rads,unless otherwise specifiedby the licensee.7.3 Radiation SourceA gamma radiation source capableof producing the dose rate and total accumulated dose specifiedin this standard,such as cobalt-60,unless otherwise specifiedby the licensee.1This test method is under the jurisdiction of ASTM Committee D33 onProtective Coating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.02 on Service and Material Parameters.Current edition approved May 15,2010.Published June 2010.Originallyapproved in 1983.Last previous edition approved in 2002 as D4082 02.DOI:10.1520/D4082-10.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.4 Test Environment:7.4.1 Specimens may be in air or in water during exposureto the gamma source,depending on the intended service asprescribed by the licensee.7.4.2 Do not exceed a temperature of 140F(60C)for thespecimen during irradiation,or as otherwise acceptable to thecoating manufacturer or as specified by the licensee.8.Testing Laboratory Report8.1 The testing laboratory shall report the following infor-mation:8.1.1 Unique test specimen identification and orientation oftest specimen in test apparatus,8.1.2 The type of radiation source and the test procedure andenvironment,8.1.3 Both the initial dose rate and the total accumulateddose,and8.1.4 Methodology for determining irradiation dose rate,irradiation accumulate