1、Designation: D4082 10Standard 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
2、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 use
3、d 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 consider
4、ed standard.2. Referenced Documents2.1 ASTM Standards:2D659 Test Method of Evaluating Degree of Chalking ofExterior Paints3D660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Method for Evaluating Degree of Cracking ofExterior PaintsD714 Test Method for Evaluating Degree of
5、 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 Po
6、werPlants3. 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
7、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
8、 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
9、 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
10、the gamma energy field at the position of the testspecimen 1 3 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 sp
11、ecimen 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 3 109rads, unless otherwise specifiedby the licensee.7
12、.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.7.4 Test Environment:1This test method is under the jurisdiction of ASTM Committee D33 onProtective Coating
13、 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.
14、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.3Withdrawn. The last approved version of this historical stan
15、dard is referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 n
16、ot 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
17、 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 accumulated dose, and specimen temperatures d
18、ur-ing test.9. Examination9.1 Examine and evaluate specimens immediately afterirradiation for the following coating defects:9.1.1 Chalking (Method D659)Record extent.9.1.2 Checking (Test Method D660)Record extent.9.1.3 Cracking (Test Method D661)Record extent.9.1.4 Blistering (Test Method D714)Recor
19、d number andextent.9.1.5 Flaking (Test Method D772)Record extent.9.1.6 DelaminationRecord extent.9.1.7 Record any observation of unusual appearance ordeterioration.10. Acceptance Criteria10.1 Acceptance criteria shall be defined by the licensee.10.2 Unless otherwise specified, checking, cracking, fl
20、ak-ing, delamination, and blistering are not permitted.10.3 Any observations of unusual appearance, for example,chalking or color change, shall be reviewed against the plantdesign basis and evaluated for acceptability.11. Documentation11.1 Documentation shall include the following:11.1.1 Procedures
21、and conditions relating to the test speci-men preparation11.1.2 Testing Laboratory report.11.1.3 Engineering assessment of the test results.11.1.4 Photo documentation, or equivalent method, of thetest panels in the before and after test condition.12. Precision and Bias12.1 The precision and bias of
22、this test method is reflectedin the precision and certified bias of the test instruments used.13. Keywords13.1 coatings; gamma radiation effects; irradiation accumu-lated dose; irradiation dose rateASTM International takes no position respecting the validity of any patent rights asserted in connecti
23、on with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible
24、 technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consi
25、deration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Ba
26、rr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D4082 102
