1、Designation:D391116Standard Test Method forEvaluating Coatings Used in Light-Water Nuclear PowerPlants at Simulated Design Basis Accident(DBA)Conditions1This standard is issued under the fixed designation D3911;the number immediately following the designation indicates the year oforiginal adoption o
2、r,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.INTRODUCTIONDuring a DBA in nuclear power plants,conditions in the reactor containment will be c
3、haracterizedby elevated temperature and pressure,as well as the presence of a radiation environment.Watersprays,with or without chemical additives,may be used in the primary containment to suppress theconsequences of the event,to scavenge radioactive products,and to return the containment tonear-amb
4、ient pressure and temperature conditions.1.Scope1.1 This test method establishes procedures for evaluatingprotective coating systems test specimens under simulatedDBA conditions.Included are a description of conditions andapparatus for temperature-pressure testing,and requirementsfor preparing,irrad
5、iating,testing,examining,evaluating,anddocumenting the samples.1.2 Consideration should be given to testing using worstcase conditions(for example,surface preparation,temperatureand pressure profile,irradiation,spray chemistry,chemicalresistance,etc.)in an effort to reduce the number of testsrequire
6、d by changing plant accident calculations,changes incoating selection,etc.1.3 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.1.4 This sta
7、ndard 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 limitations prior to use.2.Referenced Documents2.1 ASTM
8、 Standards:2D714 Test Method for Evaluating Degree of Blistering ofPaintsD4082 Test Method for Effects of Gamma Radiation onCoatings for Use in Nuclear Power PlantsD4538 Terminology Relating to Protective Coating andLining Work for Power Generation FacilitiesD5139 Specification for Sample Preparatio
9、n for Qualifica-tion Testing of Coatings to be Used in Nuclear PowerPlants3.Terminology3.1 DefinitionsDefinitions for use with this standard areshown in Terminology D4538 or other applicable standards.4.Significance and Use4.1 This test method is designed to provide a uniform test todetermine the su
10、itability of Coating Service Level 1 coatingsused inside primary containment of light-water nuclear facili-ties under simulated DBA conditions.This test method isintended only to demonstrate that under DBA conditions,thecoatings will remain intact and not form debris which couldunacceptably compromi
11、se the operability of engineered safetysystems.Deviations in actual surface preparation and in1This 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 M
12、aterial Parameters.Current edition approved Aug.1,2016.Published October 2016.Originallyapproved in 1980.Last previous edition approved in 2008 as D3911 08.DOI:10.1520/D3911-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For A
13、nnual 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 application and curing of the coating materials from qualifica-tion test parame
14、ters require an engineering evaluation todetermine if additional testing is required.4.2 Since different plants have different tolerance levels forcoating conditions,the definition of appropriate acceptancecriteria is to be developed by the license holder based onindividual plant engineered safety s
15、ystems operability consid-erations.4.3 Use of this standard is predicated on the testing facilityhaving a quality assurance program acceptable to the licensee.5.Apparatus5.1 Environmental Test System,Test Sample Hangers,andTest Sample Identification Tags,constructed of materials thatare corrosion-re
16、sistant to the test solutions.5.2 The test system shall be capable of reproducing andcontinuously recording the temperature and pressure profiles ofthe DBA conditions.5.3 Asufficient number of thermocouples shall be located inthe test chamber to assure conformity to the test curve,and sothat both the temperature of the vapor phase and,if required,ofthe liquid phase(if present)can be recorded.5.4 The thermocouples and test samples shall be positionedto avoid direct steam and spray impingement.5.5
