Document: NUREG-0800
Document ID: 93695235-ba5b-4bfb-be93-d9aec2460bd0
Document Type: srp
Title: STEAM AND FEEDWATER SYSTEM MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190016.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3.6
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for review of component integrity issues related to reactor coolant pressure boundary Secondary - Organization responsible for the review of materials engineering issues related to flaw evaluation and welding I. AREAS OF REVIEW The materials selection, fabrication, and fracture toughness of American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (hereafter "the Code"), Section III, Class 2 and 3 pressure boundary components of the steam and feedwater systems are reviewed to verify they meet the relevant requirements of the Commission’s regulations, as well as addressing issues identified in relevant operating experience. The specific areas of review are as follows: 1. Materials Selection and Fabrication of Class 2 and 3 Components A. The materials selected for all Class 2 and 3 components and their fabrication are reviewed. B. For all components the following points are reviewed: i. The qualification procedures for welds in areas of limited accessibility are reviewed. 10.3.6-2 Revision 3 - March 2007 ii. The welding preheat temperatures are reviewed. iii. The controls placed on welding procedures are reviewed. iv. The cleaning procedures are reviewed. v. For tubular products, the nondestructive examination procedures are reviewed for conformance with the ASME Code. C. For carbon and low alloy steel components or cast austenitic stainless steel components, the controls placed on welding procedures are reviewed. 2. Fracture Toughness of Class 2 and 3 Components The fracture toughness properties of ferritic materials used for Class 2 and 3 components are reviewed. Typical components in this review include carbon or low-alloy steel portions of steam and feedwater lines in both pressurized water reactors (PWRs) and boiling water reactors (BWRs). If cast austenitic stainless steel material is proposed for use, the adequacy of the material fracture toughness properties to withstand thermal