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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, standards or third party guidance documents (“secondary references”). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in a regulatory guide as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as described in the specific regulatory guide. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in a regulatory guide, then the secondary reference is neither a legally-binding requirement nor a “generic” NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. 2 A lot (batch) is defined as a definite quantity of some product manufactured under conditions of production that are considered uniform for quality analysis. Not to be confused with an ‘inspection’ lot which is the sample taken to perform testing of the production batch. ASTM C390-08 (Ref. 8) DG-1312 Page 4 C. STAFF REGULATORY GUIDANCE The levels of leachable contaminants in nonmetallic insulation materials3 that come in contact with austenitic stainless steels of the American Iron & Steel Institute (AISI) Type 3XX series used in fluid systems important to safety should be carefully controlled so that stress-corrosion cracking is not promoted. Insulation for the above application should minimize the leachable chlorides and flourides to the lowest practicable levels by meeting the following conditions: 1. All insulating materials should be manufactured, processed, packaged, shipped, stored, and installed in a manner that