Document: NUREG-0800
Document ID: 2adccc8f-d828-4baf-b696-6ee4f776837b
Document Type: srp
Title: REACTOR INTERNAL AND CORE SUPPORT MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070416.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.5.2
CFR Part: 
CFR Title: 

Content:
ternal structures. The reactor internal and core support structures 8 are all structures and components within the pressure vessel other than the fuel and control assemblies, and instrumentation.9 The adequacy and suitability of the materials specified for the above applications are reviewed in terms of their mechanical properties, stress corrosion resistance, and fabricability. 2. Controls on Welding The review includes the controls on welding of materials used for reactor internals and core support structures.10 3. Nondestructive Examination of Wrought Seamless Tubular Products and Fittings11 The review includes information submitted by the applicant on the nondestructive examinations procedures used for inspection of each product form. 12 4. Austenitic Stainless Steel Austenitic stainless steels isare primarily used for the construction of the reactor 13 internals and core support structures. These steels may be used in a variety of product 14 forms including several stabilized product forms. Unstabilized austenitic stainless steels, such as Types 304 and 316, is normallyare frequently specified.15 Since theseunstabilized compositions are susceptible to stress corrosion cracking when 16 exposed to certain environmental conditions, process controls must be exercised during all stages of component manufacturing and reactor construction to avoid sensitization of the material, and to minimize exposure of the stainless steel to contaminants that lead to stress-corrosion cracking. The review includes information submitted by the applicant in these areas, as described in SRP Section 5.2.3, "Reactor Coolant Pressure Boundary Materials." 5. Other Materials Materials other than austenitic stainless steels are reviewed and evaluated in terms of their mechanical properties, corrosion resistance, and fabricability. 4.5.2-3 DRAFT Rev. 3 - April 1996 Review Interfaces17 EMCB also performs the following related reviews under the SRP Sections indicated: 1. Evaluates the adequacy