1、Designation: D 4082 02Standard Test Method forEffects of Gamma Radiation on Coatings for Use in Light-Water Nuclear Power Plants1This standard is issued under the fixed designation D 4082; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi
2、sion, 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 test method covers a standard procedure for evalu-ating the lifetime radiation tolerance of co
3、atings to be used innuclear power plants. This test method is applicable to CoatingService Levels I and II.2. Referenced Documents2.1 ASTM Standards:D 659 Test Method of Evaluating Degree of Chalking ofExterior Paints2D 660 Test Method for Evaluating Degree of Checking ofExterior Paints3D 661 Test M
4、ethod for Evaluating Degree of Cracking ofExterior Paints3D 714 Test Method for Evaluating Degree of Blistering ofPaints3D 772 Test Method for Evaluating Degree of Flaking (Scal-ing) of Exterior Paints3D 5139 Specification for Sample Preparation for Qualifica-tion Testing of Coatings to be Used in N
5、uclear PowerPlants43. Significance and Use3.1 Variations can occur in surface preparation, application,and curing of coating materials. They may affect the perfor-mance of a coating system exposed to radiation when consid-ered in conjunction with applicable engineered safety require-ments. This test
6、 method is designed to provide a uniform testto assess the suitability of coatings, used in nuclear powerfacilities, under continuous radiation exposure for the projected40-year lifetime of the facilities, including radiation during aDBA. Specific plant radiation exposure may exceed or be lessthan t
7、he amount specified in 6.2 of this standard. The gammadose used may exceed the actual anticipated plant gamma dosein order to account for expected beta exposure as well.Coatings in Level II areas (outside primary containment) areexpected to be exposed to lower accumulated radiation doses.4. Preparat
8、ion of Test Samples4.1 Steel PanelsPanels shall be prepared in accordancewith Specification D 5139.4.2 Concrete BlocksBlocks shall be prepared in accor-dance with Specification D 5139.5. Sampling5.1 Prepare and test specimens at least in duplicate, or asotherwise specified by the owner.6. Procedures
9、6.1 Irradiation Dose Rate:6.1.1 Make the gamma energy field at the position of the testspecimen 1 3 106rads/h, or greater, unless otherwise specifiedby the owner. It shall be uniform to within 10 % from oneposition of the specimen to another.6.1.2 Make provisions so that all areas receive the sameav
10、erage exposure and dose, if the specimen is irradiated by anonuniform source.6.1.3 Determine the dose rate by a procedure acceptable tothe coating manufacturer or as otherwise specified by theowner.6.2 Irradiation Accumulated DoseMake the total accu-mulated dose 1 3 109rads, unless otherwise specifi
11、ed by theowner.6.3 Radiation SourceSimulate conditions at a reactor site,closest to the preferred type of gamma source, such as, but notlimited to, a fuel assembly.6.4 Test Environment:6.4.1 Specimens may be in air or in water during exposureto the gamma source, depending on the intended service asp
12、rescribed by the owner.6.4.2 Do not exceed a temperature of 140F (60C) for thespecimen during irradiation, or as otherwise acceptable to thecoating manufacturer or as specified by the owner.7. Examination and Reporting7.1 Examine and evaluate specimens immediately afterirradiation for the following
13、coating defects:7.1.1 Chalking (Method D 659)Report extent.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
14、approved Jan. 10, 2002. Published March 2002. Originallypublished as D 4082 83. Last previous edition D 4082 95.2Discontinued; see 1993 Annual Book of ASTM Standards, Vol 06.01.3Annual Book of ASTM Standards, Vol 06.01.4Annual Book of ASTM Standards, Vol 06.02.1Copyright ASTM International, 100 Barr
15、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.2 Checking (Test Method D 660)Report extent.7.1.3 Cracking (Test Method D 661)Report extent.7.1.4 Blistering (Test Method D 714)Report number andextent.7.1.5 Flaking (Test Method D 772)Report extent.7.1.6 DelaminationRep
16、ort extent.7.1.7 PeelingReport extent.7.1.8 Report any observation of unusual appearance ordeterioration.8. Acceptance Criteria8.1 Unless otherwise specified, checking, cracking, flaking,delamination, peeling, and blistering are not permitted.9. Report9.1 Report the following information:9.1.1 The p
17、rocedures and conditions relating to the testspecimen preparation,9.1.2 The type of radiation source and the test procedure andenvironment, and9.1.3 Both the initial dose rate and the total accumulateddose.10. Testing Laboratory10.1 Testing shall be conducted by an independent labora-tory that shall
18、 not be affiliated in any manner with the coatingsmanufacturer unless otherwise specified by the owner.10.2 The testing laboratory shall be responsible for thedocumentation and certification of all test results.10.3 The testing laboratory shall be responsible for meetingthe quality assurance require
19、ments of the owner.11. Precision and Bias11.1 The precision and bias of this test method is reflectedin the precision and certified bias of the test instruments used.12. Keywords12.1 coatings; dose rate; gamma radiation resistanceASTM International takes no position respecting the validity of any pa
20、tent rights asserted in connection 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 revisio
21、n at any time by the responsible 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 com
22、ments will receive careful consideration 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 copyright
23、ed by ASTM International, 100 Barr 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).D 40822
