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:
on III of the ASME Code. 2. Fracture Toughness of Class 2 and 3 Components The fracture toughness properties of the ferritic materials of these components should meet the following requirements of the editions and addenda of Section III of the Code, as specified in 10 CFR 50.55a: A. NC-2300, "Fracture Toughness Requirements for Material" (Class 2) B. ND-2300, "Fracture Toughness Requirements for Material" (Class 3) Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a require that SSCs be designed, fabricated, erected, constructed, tested, and inspected to the highest quality standards commensurate with the importance of the safety function to be performed. The steam and feedwater systems may be relied upon to perform safety functions such as removing decay heat or supplying steam to engineered safety feature pumps. This SRP reviews the selection of and specifications for materials used for these two systems. Regulatory Guide 1.71 10.3.6-6 Revision 3 - March 2007 provides specific guidance for assuring the quality and integrity of welds with limited direct physical and visual accessibility. Regulatory Guide 1.84 provides guidance for application of ASME Code Cases to materials selection and fabrication. Meeting the requirements of GDC 1 and 10 CFR 50.55a and the positions of Regulatory Guides 1.71 and 1.84 assures system integrity and the ability to support emergency core cooling. 2. GDC 35 requires that an emergency core cooling system be provided that can remove decay heat following a loss of reactor coolant. The steam and feedwater systems may be utilized to perform safety functions such as removing decay heat or supplying steam to engineered safety feature (ESF) pumps. This SRP evaluates steam and feedwater materials including material fracture toughness properties. By verifying that steam and feedwater