Document: NRC Regulatory Guide
Document ID: a85f80f8-a5b4-4f0a-84fd-1eb04d49dd57
Document Type: regulatory_guide
Title: Service Level I, II, and III Protective Coatings Applied to Nuclear Power Plants + HISTORY - HISTORY 08/2016 – DG-1331 , Proposed Revision 3 10/2015 – Periodic Review of Revision 2 – Revise 10/2010 – Periodic Review of Revision 1 – No issues identified 04/2010 – DG-1242 , Proposed Revision 2 03/1999 – DG-1076 , Proposed Revision 1 (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1609/ML16097A448.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.54
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CFR Title: 

Content:
rovides further discussion on the significance of thermal conductivity of coating systems. ASTM D 5144-08ε1 lists test methods for determining thermal conductivity of a coating and a table of thermal conductivity values for coatings used in NPP containments. The coating types and the thermal conductivity values provided in the table are described as “typical.” The NRC staff accepts the use of ASTM D 5144-08ε1 for thermal conductivity with the following exceptions: • In reviews of activities involving safety-related coatings, the staff may find it acceptable to determine thermal conductivity by methods other than those listed in ASTM D 5144-08ε1 if adequate technical justification is provided. DG-1331, Page 13 • If the generic values of thermal conductivity listed in Table X1.1 of D 5144-08ε1 are used in an analysis involving a safety-related coating, the licensee/applicant should confirm that the values are justified for the actual coating. 5.3 The Society for Protective Coatings (SSPC) 3 PA 2, “Procedure for Determining Conformance to Dry Coating Thickness Requirements,” revised January 2015 (Ref. 40), provides guidance that the NRC staff finds acceptable for determining conformance of coating to a specified dry film thickness range on ferrous and non-ferrous metal substrates using nondestructive coating thickness gages (magnetic and electronic) described in ASTM D 7091. D. IMPLEMENTATION The purpose of this section is to provide information on how applicants and licensees4 may use this guide and information regarding the NRC’s plans for using this RG. In addition, it describes how the NRC staff complies with 10 CFR 50.109, “Backfitting” and any applicable finality provisions in 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants.” Use by Applicants and Licensees Applicants and licensees may voluntarily5 use the guidance in this document to demonstrate compliance with the underlying NRC regulations. Methods or