ASTM D7491-21

Standard Guide for Management of Non-Conforming Coatings in Coating Service Level I Areas of Nuclear Power Plants

SIGNIFICANCE AND USE
5.1 There are several methods for managing non-conforming coatings in an operating nuclear power plant. This guide outlines methods that have been determined to be acceptable to the nuclear industry.  
5.2 Managing the amount of non-conforming coatings is key to ensuring the amount assumed, in the licensing bases is not exceeded.  
5.3 EPRI Report 1019157 provides additional information on the selection, application, inspection and maintenance of nuclear plant safety-related protective coatings. This reference offers a detailed discussion of important considerations related to protective coatings and can be used to supplement this guide as deemed necessary.
SCOPE
1.1 This guide provides the user with guidance on developing a program for managing non-conforming coatings in Coating Service Level I areas of a nuclear power plant.  
1.2 Non-conforming coatings include degraded qualified or acceptable coatings, unqualified coatings, unknown coatings, and unacceptable coatings.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Jan-2021
• ICS: 27.120.20 - Nuclear power plants. Safety
• Technical Committee: D33 - Protective Coating and Lining Work for Power Generation Facilities
• Drafting Committee: D33.10 - Protective Coatings Maintenance Work for Power Generation Facilities

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7491 − 21
Standard Guide for
Management of Non-Conforming Coatings in Coating
1
Service Level I Areas of Nuclear Power Plants
This standard is issued under the fixed designation D7491; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Regulatory Guide 1.54 Revision 2, Service Level I, II, and
3
III Protective Coatings Applied to Nuclear Power Plants
1.1 This guide provides the user with guidance on develop-
Regulatory Guide 1.54 Revision 3, Service Level I, II, and
ing a program for managing non-conforming coatings in
III and In-Scope License Renewal Protective Coatings
Coating Service Level I areas of a nuclear power plant.
3
Applied to Nuclear Power Plants
1.2 Non-conforming coatings include degraded qualified or
EPRI 1019157 Plant Support Engineering: Guideline on
acceptable coatings, unqualified coatings, unknown coatings,
Nuclear Safety-Related Coatings, Revision 2 (formerly
4
and unacceptable coatings.
TR109937 and 1003102)
1.3 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1 Definitions—Definitions for use with this guide are
priate safety, health, and environmental practices and deter-
shown in Terminology D4538 or other applicable standards.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor- 4. Summary of Practice
dance with internationally recognized principles on standard-
4.1 The process and use of this guide is summarized in
ization established in the Decision on Principles for the
Fig. 1.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5. Significance and Use
Barriers to Trade (TBT) Committee.
5.1 There are several methods for managing non-
conforming coatings in an operating nuclear power plant. This
2. Referenced Documents
guide outlines methods that have been determined to be
2
2.1 ASTM Standards:
acceptable to the nuclear industry.
D4538 Terminology Relating to Protective Coating and
5.2 Managing the amount of non-conforming coatings is
Lining Work for Power Generation Facilities
key to ensuring the amount assumed, in the licensing bases is
2.2 Other Documents:
not exceeded.
Regulatory Guide 1.54 Revision 0, Quality Assurance Re-
5.3 EPRI Report 1019157 provides additional information
quirements for Protective Coatings Applied to Water-
3
on the selection, application, inspection and maintenance of
Cooled Nuclear Power Plants
nuclear plant safety-related protective coatings. This reference
Regulatory Guide 1.54 Revision 1, Service Level I, II, and
3
offers a detailed discussion of important considerations related
III Protective Coatings Applied to Nuclear Power Plants
to protective coatings and can be used to supplement this guide
as deemed necessary.
1
This guide is under the jurisdiction of ASTM Committee D33 on Protective
6. Establishing the Design Limit of Non-Conforming
Coating and Lining Work for Power Generation Facilities and is the direct
responsibility of Subcommittee D33.10 on Protective Coatings Maintenance Work Coatings
for Power Generation Facilities.
6.1 Determine what coatings do not meet the licensing basis
Current edition approved Feb. 1, 2021. Published February 2021. Originally
approved in 2008. Last previous edition approved in 2015 as D7491 – 08 (2015). for the plant. For plants that have commitments to meet
DOI: 10.1520/D7491-21.
Regulatory Guide 1.54 (applicable revision) or related ANSI/
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ASTM standards, or both, typically require DBA testing of
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from U. S. Nuclear Regulatory Commission, Distribution Services Available from EPRI Customer Fulfillment, 1355 Willow Way, Suite 278,
Section, Washington, DC 20555–0001, http://www.nrc.gov. Concord, CA 94520.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7491 − 21
FIG. 1 Managing Non-Conforming Coatings
2

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D7491 − 21
coatings an
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7491 − 08 (Reapproved 2015) D7491 − 21
Standard Guide for
Management of Non-Conforming Coatings in Coating
1
Service Level I Areas of Nuclear Power Plants
This standard is issued under the fixed designation D7491; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This guide provides the user with guidance on developing a program for managing non-conforming coatings in Coating
Service Level I areas of a nuclear power plant.
1.2 Non-conforming coatings include degraded previously DBA-qualified qualified or acceptable coatings, unqualified coatings,
unknown coatings, and unacceptable coatings.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D4538 Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities
2.2 Other Documents:
Regulatory Guide 1.54 Revision 0, Quality Assurance Requirements for Protective Coatings Applied to Water-Cooled Nuclear
3
Power Plants
3
Regulatory Guide 1.54 Revision 1, Service Level I, II, and III protectiveProtective Coatings Applied to Nuclear Power Plants
3
Regulatory Guide 1.54 Revision 2, Service Level I, II, and III Protective Coatings Applied to Nuclear Power Plants
Regulatory Guide 1.54 Revision 3, Service Level I, II, and III and In-Scope License Renewal Protective Coatings Applied to
3
Nuclear Power Plants
EPRI Report 10031021019157 Plant Support Engineering: Guideline on Nuclear Safety-Related Coatings, Revision 1 (formerly
4
TR-109937)2 (formerly TR109937 and 1003102)
3. Terminology
3.1 Definitions—Definitions for use with this guide are shown in Terminology D4538 or other applicable standards.
1
This guide is under the jurisdiction of ASTM Committee D33 on Protective Coating and Lining Work for Power Generation Facilities and is the direct responsibility
of Subcommittee D33.10 on Protective Coatings Maintenance Work for Power Generation Facilities.
Current edition approved Dec. 1, 2015Feb. 1, 2021. Published January 2016February 2021. Originally approved in 2008. Last previous edition approved in 20082015 as
D7491D7491 – 08 (2015). – 08. DOI: 10.1520/D7491-08R15.10.1520/D7491-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U. S. Nuclear Regulatory Commission, Distribution Services Section, Washington, DC 20555–0001, http://www.nrc.gov.
4
Available from EPRI Customer Fulfillment, 1355 Willow Way, Suite 278, Concord, CA 94520.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7491 − 21
3.2 Definitions of Terms Specific to This Standard:
3.2.1 non-conforming coatings, n—a coating or coating system in a Coating Service Level I application that lacks or has
insufficient documentation to support or verify DBA qualification.
3.2.1.1 Discussion—
This would include coatings referred to as unqualified, unacceptable, and degraded qualified coatings.
3.2.2 unacceptable coating system, n—A safety related coating system for which no suitability for application review which meets
the plant licensing requirements has been completed.
3.2.2.1 Discussion—
Therefore, no reasonable assurance exists that, when properly applied and maintained, the coating or lining will not detach under
normal or accident conditions. This is applicable to “pre-ANSI” plants.
4. Summary of Practice
4.1 The process and use of this guide is summarized in
Fig. 1.
5. Significance and Use
5.1 There are several methods for managin
...