Document: NUREG-0800
Document ID: e6a79bdb-930d-4b57-91b9-39db4d8a76f1
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190010.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
complying with the relevant NRC requirements identified in Subsection II. 1. Materials and Fabrication A. Material Specifications. The reviewer verifies that the materials proposed for the ESF are in conformance with Parts A, B, and C of Section II of the ASME Code, Appendix I of Section III, Division 1 of the Code, and/or with acceptable material Code Cases as identified in RG 1.84. For ESF portions of the austenitic stainless steel piping specified in GL 88-01, the reviewer verifies that materials are in conformance with staff positions on BWR materials described in Attachment A to GL 88-01 or the recommendations of NUREG-0313 for stress corrosion resistant materials. B. Nickel-Chromium-Iron Alloys. Operating experience has indicated that certain nickel-chromium-iron alloys (e.g., Inconel) are susceptible to cracking due to corrosion. Inconel Alloy 690 has improved corrosion resistance in comparison to Inconel Alloy 600 previously used in reactor applications. Where nickel- chromium-iron alloys are proposed for use as ESF materials, the reviewer verifies that an acceptable technical basis is either identified (based upon demonstrated satisfactory use in similar applications) or presented by the applicant to support use of the material under the expected environmental conditions (e.g., exposure to the reactor coolant). Particular review emphasis is placed upon the corrosion resistance and stress corrosion cracking resistance properties of the proposed nickel-chromium-iron alloy(s). 6.1.1-11 Revision 2 - March 2007 C. Austenitic Stainless Steels. The reviewer verifies that cold-worked austenitic stainless steels used in fabrication of the ESF and associated controls for fabrication are in conformance with the criteria specified in subsection II.1.A of this SRP section, including the criteria specified for BWR piping susceptible to IGSCC in Attachment A to GL 88-01 or NUREG-0313, where applicable. The methods of controlling sensitized stainless steel in the ESF