Document: NUREG-0800
Document ID: 638ddb22-e6d2-4b69-855f-e55482aae718
Document Type: srp
Title: STEAM AND FEEDWATER SYSTEM MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070583.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3.6
CFR Part: 
CFR Title: 

Content:
terials is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a require that structures, systems, and components 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 provides specific guidance for assuring the quality and integrity of limited visibility welds. Regulatory Guide 1.85 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 1.85 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 system materials meet GDC 35 requirements, assurance is provided that steam and feedwater system integrity will be maintained thereby allowing these systems to fulfill their safety functions of removing decay heat and supplying steam to ESF pumps. 3. 10 CFR 50 Appendix B provides quality assurance requirements for the design, construction, and operation of safety related structures, systems and components of a nuclear plant. 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.