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
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CFR Title: 

Content:
essibility, and the methods for monitoring and certification of production welds in such areas are in accordance with the acceptance criteria stated in subsection II.2.b(1) of this SRP section. b. The reviewer determines that the methods for cleaning and handling the Class 2 and 3 components are in accordance with acceptance criteria stated in subsection II.2.b(2) of this SRP section. c. The reviewer verifies that the tubular products are examined in accordance with acceptance criteria stated in subsection II.2.b(3) of this SRP section. d. If stainless steel materials are used in the design of the steam or feedwater systems, the reviewer should verify that the applicant has adequately addressed the potential for IGSCC. The reviewer should use the applicable criteria of SRP Section 5.2.3, "Reactor Coolant Pressure Boundary Materials," as they relate to material selection and fabrication process controls for stainless steel. 35 3. Erosion/Corrosion The reviewer determines that erosion/corrosion resistance has been considered in the design of steam and feedwater systems such that the effects of erosion/corrosion are minimized for the lifetime of the plant. NUREG-1344, "Erosion/Corrosion-Induced Pipe Wall Thinning in U.S. Nuclear Power Plants," (Reference 9) furnishes insight into the phenomena of erosion/corrosion in single-phase piping and provides recommendations for minimizing its effects. a. The reviewer determines that piping subject to erosion/corrosion degradation has been designed using erosion/corrosion resistant materials.36 b. The reviewer verifies that the applicant has specified a corrosion allowance accounting for the design life of the plant and that meets Section III of the ASME Code or ANSI/ASME B.31.1, "Power Piping," (Reference 12) as applicable.37 c. The reviewer verifies that the design and layout of piping minimizes the erosion/corrosion effects from fluid velocity, bend locations, and flash points.38 34. General 39 DRAFT Rev. 3 - April 1996