ASTM D4538-21

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Designation: D4538 − 15 D4538 − 21
Standard Terminology Relating to
Protective Coating and Lining Work for Power Generation
Facilities
This standard is issued under the fixed designation D4538; 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 terminology covers terms and their definitions relevant to the use of protective coatings in nuclear power plants.
1.2 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
2.1 ASTM Standards:
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D1193 Specification for Reagent Water
D3843 Practice for Quality Assurance for Protective Coatings Applied to Nuclear Facilities
D3911 Test Method for Evaluating Coatings Used in Light-Water Nuclear Power Plants at Simulated Design Basis Accident
(DBA) Conditions
D4227 Practice for Qualification of Coating Applicators for Application of Coatings to Concrete Surfaces
D4228 Practice for Qualification of Coating Applicators for Application of Coatings to Steel Surfaces
D4537 Guide for Establishing Procedures to Qualify and Certify Personnel Performing Coating and Lining Work Inspection in
Nuclear Facilities
D4787 Practice for Continuity Verification of Liquid or Sheet Linings Applied to Concrete Substrates
D5144 Guide for Use of Protective Coating Standards in Nuclear Power Plants
D5161 Guide for Specifying Inspection Requirements for Coating and Lining Work (Metal Substrates) (Withdrawn 2013)
D5162 Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates
D5367 Practice for Evaluating Coatings Applied Over Surfaces Treated With Inhibitors Used to Prevent Flash Rusting of Steel
When Water or Water/Abrasive Blasted
D5962 Guide for Maintaining Unqualified Coatings (Paints) Within Level I Areas of a Nuclear Power Facility (Withdrawn
2008)
D7491 Guide for Management of Non-Conforming Coatings in Coating Service Level I Areas of Nuclear Power Plants
This terminology 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 D33.92 on Definitions.
Current edition approved Dec. 1, 2015Feb. 1, 2021. Published December 2015February 2021. Originally approved in 1986. Last previous edition approved in 20132015
as D4538D4538 – 15. – 13 DOI: 10.1520/D4538-15.10.1520/D4538-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
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D4538 − 21
2.2 Other Documents:
USNRC Regulatory Guide 8.8 Ensuring Occupational Radiation Exposure ALARA at Nuclear Power Stations
10CFR20.1 Standards for Protection Against Radiation
3. Terminology
acceptable coating or lining system, n—safety-related coating or lining system for which a suitability for application review
that meets the plant licensing requirements has been completed and there is reasonable assurance that, when properly applied
and maintained, the coating or lining will not detach under normal or accident conditions. D5144
ALARA, n—concept of reducing radiation exposure to personnel to levels “as low as reasonably achievable,” as defined in the
USNRC Regulatory Guide 8.8 and 10CFR20.1(C). D5144
blistering, n—the formation of bubbles in a coating (paint) film. Seeraised areas in the applied coating film resulting from D16
(take out “ability to resist”).local loss of adhesion with subsequent lifting of the film from the underlying surface. D3911
boiling water reactor (BWR), n—reactor in which the water moderator-coolant is boiled directly within the reactor core and
the pressure in the reactor vessel is only slightly greater than the steam turbine pressure. D3911
certification, n—written documentation of qualification.
checking, n—slight breaks in the film that do not penetrate to the previously applied coating or to the substrate.
chemical spray, n—solution of chemicals that could be used during a loss of coolant accident (LOCA) to suppress the incident,
to scavenge fission products, and to return the facility to near-ambient conditions. D3911
coating applicator, n—organization or individual responsible for applying a protective or decorative coating. D3843
coating manufacturer, n—organization responsible for manufacturing coating materials. D3843
Coating Service Level I, n—term used to describe areas inside the reactor containment where coating failure could adversely
affect the operation of post-accident fluid systems and, thereby, impair safe shutdown. D5144
Coating Service Level II, n—term used to describe areas outside the reactor containment where coating failure could impair,
but not prevent, normal operating performance; the function of Coating Level II coatings is to provide corrosion protection and
decontaminability in those areas outside the reactor containment subject to radiation exposure and radionuclide contamination
and Service Level II coatings are not safety-related. D5144
Coating Service Level III, n—term used to describe areas outside the reactor containment where coating failure could adversely
affect the safety function of a safety-related structure, system, or component (SSC). D5144
coating system, n—polymeric protective film consisting of one or more coats, applied in a predetermined order by prescribed
methods. D3843
coating work, n—an all-inclusive term to define all operations required to accomplish a complete coating job; the term shall
be construed to include materials, equipment, labor, preparation of surfaces, control of ambient conditions, application and repair
of coating systems, and inspection. D3843
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
D4538 − 21
coating work inspection, n—phase of quality control that, by means of examination, observation, or measurement, determines
the conformance of coating work to predetermined quality requirements. D4537
Code of Federal Regulations (CFR), n—rules and regulations of the U.S. Federal Government; the code is subdivided into
titles, with Title 10 (10 CFR) applying to energy. D3843
cracking, n—formation of breaks in a coating film that extend through to the underlying surface.
crawling, n—defect in which the wet film recedes from localized areas of the substrate (usually caused by insufficient wetting)
leaving those areas uncoated. D16
curing, n—transformation of a coating or other material into a solid phase or film. D3911
damp, adj—moist but not visibly wet.
DBA qualified coating system, n—coating system used inside reactor containment that can be attested to having passed the
required laboratory testing, including irradiation and simulated design basis accident (DBA), and has adequate quality
documentation to support its use as DBA qualified. D5144
DBA unqualified coating system, n—coating system used inside reactor containment that cannot be attested to having passed
the required laboratory testing, including irradiation and simulated DBA or has inadequate quality documentation, or both, to
support its use as DBA qualified. D5144
deionized water, n—water that has been purified of salts by passing through a cation-exchange resin to replace metal ions, such
as calcium and iron, with the hydrogen ion and through an anion-exchange resin to remove both the hydrogen ions and the
corresponding negative ions.
delamination, n—separa
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