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
CFR Part: 
CFR Title: 

Content:
(DBA) testing, surface preparation, coating application and inspection, and thermal conductivity testing. The NRC staff views ASTM D 5144-08ε1 as a top-level ASTM International standard that provides detailed requirements through reference to other key ASTM International standards. Figure 1 (below) shows the other ASTM International standards that supply application-specific guidance; each of these standards are discussed in Section C of this RG. Guidance in ASTM International Standards ASTM D 5144-08ε1 and the other ASTM International standards discussed below provide guidance on practices and programs the NRC staff finds acceptable for the selection, application, qualification, inspection, and maintenance of protective coatings applied to NPPs. ASTM International, Committee D-33 has defined Service Level I, II, and III coating locations to include both safety-related and nonsafety-related regions as set forth below. Service Level I, II, and III coatings are defined as follows: a. Service Level I coatings are used in areas inside the reactor containment where coating failure could adversely affect the operation of post-accident fluid systems and thereby impair safe shutdown. b. Service Level II coatings are used in areas where coating failure could impair, but not prevent, normal operating performance. The functions of Service Level II coatings are to provide corrosion protection and enhance the coating’s ability to be decontaminated in those areas outside the reactor containment that are subject to radiation exposure and radionuclide contamination. Service Level II coatings are not safety related. c. Service Level III coatings are used in areas outside the reactor containment where failure could adversely affect the safety function of a safety-related SSC. (Note that a coating on the external surface of a reactor containment may be designated Service Level III, although no plants licensed under 10 CFR Part 50 have applied this designation.) On November 14,