Document: NRC Regulatory Guide
Document ID: ff075502-711b-4416-bfc8-a2a645bfe130
Document Type: regulatory_guide
Title: Nonmetallic Thermal Insulation for Austenitic Stainless Steel + HISTORY - HISTORY DG-1312 , Proposed Revision 1, published 09/2014 (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1407/ML14079A671.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.36
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procedures that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable when selecting and using nonmetallic thermal insulation to minimize any contamination that could promote stress-corrosion cracking in the stainless steel portions of the reactor coolant pressure boundary and other systems important to safety. This guide applies to light-water-cooled reactors. Applicable Rules and Regulations • Appendix A to 10 CFR Part 50, “General Design Criteria for Nuclear Power Plants,” (Ref. 1), General Design Criteria (GDC) 1, “Quality Standards and Records,” requires that structures, systems, and components important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be performed. • GDC 14, “Reactor Coolant Pressure Boundary,” and GDC 31, “Fracture Prevention of Reactor Coolant Pressure Boundary,” require assurance that the reactor coolant pressure boundary will have an extremely low probability of gross rupture or rapidly propagating fracture. Stress- corrosion cracking, which is promoted by certain contaminants, is one mechanism whereby such failures may be postulated. Purpose of Regulatory Guides The NRC issues regulatory guides to describe to the public methods that the staff considers acceptable for use in implementing specific parts of the agency’s regulations, to explain techniques that the staff uses in evaluating specific problems or postulated accidents, and to provide guidance to applicants. Regulatory guides are not substitutes for regulations and compliance with them is not required. Methods and solutions that differ from those set forth in regulatory guides will be deemed DG-1312 Page 2 acceptable if they provide a basis for the findings required for the issuance or continuance of a permit or license by the Commission. Paperwork Reduction Act This regulatory guide contains information collection requirements covered by 10 CFR Part