Document: NUREG-0800
Document ID: 4a46b35d-2e81-4517-9716-154b19f57049
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190006.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.3
CFR Part: 
CFR Title: 

Content:
s of GDC 1, GDC 50, and § 50.55a for welding of ferrite materials under limited accessibility. The controls imposed on weld cladding of low-alloy steel components by austenitic stainless steel are in accordance with the 5.2.3-22 Revision 3 - March 2007 recommendations of Regulatory Guide 1.43, “Control of Stainless Steel Weld Cladding of Low-Alloy Steel Components.” These controls provide assurance that practices that could result in underclad cracking will be restricted. The controls also satisfy the quality standards requirements of GDC 1, GDC 30, and § 50.55a for weld cladding of low alloy steel components by austenitic stainless steel. The controls to avoid stress corrosion cracking in reactor coolant pressure boundary components constructed of austenitic stainless steels limit yield strength of cold-worked austenitic stainless steels to 620 MPa (90,000 psi) maximum and conform to the recommendations of Regulatory Guides 1.44, “Control of the Use of Sensitized Stainless Steel,” and [for BWRs only] the positions of Generic Letter 88-01 or recommendations contained in NUREG-0313, Revision 2, and Regulatory Guide 1.37, “Quality Assurance Requirements for Cleaning of Fluid Systems and Associated Components of Water Cooled Nuclear Power Plants.” The controls in accordance with these recommendations are followed during material selection, fabrication, examination, and protection, in order to prevent excessive yield strength, sensitization, and contamination. These controls provide reasonable assurance that the RCPB components of austenitic stainless steels will be in a metallurgical condition that minimizes susceptibility to stress corrosion cracking during service. Accordingly, these controls ensure that austenitic stainless steel RCPB components are compatible with the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, as required by GDC 4. For the same reasons, these controls meet the