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:
ressure testing; on conditions for radiation testing; and on procedures for preparing, examining, and evaluating samples. ASTM D 3911-08 does not specify minimum acceptance criteria. For Service Level I coatings, the licensees or applicants should meet the following minimum acceptance criteria: a. Peeling and delamination should not be permitted. b. Cracking should not be considered a failure unless it is accompanied by delamination or loss of adhesion. DG-1331, Page 9 c. Blisters should be limited to intact blisters that are completely surrounded by sound coating bonded to the surface. The licensee or applicant may establish more stringent acceptance criteria; the above criteria are meant as minimum standards only. Appendix X2 to ASTM D 3911-08 discusses witness coupons in primary containment. These test coupons, if properly placed, provide a realistic mechanism to test and evaluate the aging of coatings. Selected coupons could be periodically removed and tested to identify changes in various physical properties and could be DBA-tested to provide much better and more realistic predictions of coating life. New NPPs should consider the installation of coated test coupons at various locations in the primary containment. The coated test coupons would be representative of the aged condition of similar coatings within the primary containment. The licensee could use the test coupons for coating condition analysis and aging studies during the commercial life of the NPP. 2.3 ASTM D 3912-10, “Standard Test Methods for Chemical Resistance of Coatings and Linings for Use in Nuclear Power Plants,” (Ref. 19) offers guidance that the NRC staff finds acceptable for evaluating the chemical resistance of coatings applied to light-water NPPs. 2.4 ASTM D 4082-10, “Standard Test Methods for Effects of Gamma Radiation on Coatings for Use in Nuclear Power Plants,” (Ref. 20) provides a standard test method that the NRC staff finds acceptable for evaluating the effects of gamma