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:
des that the materials used for the construction of the reactor internals and core support structures are acceptable and meet the requirements of General Design 61 Criterion 1 and Section 50.55a of 10 CFR Part 50. This conclusion is based upon the following considerations: The applicant has met the requirements of GDC 1 and Section 50.55a of 10 CFR Part 50 with respect to assuringprovided assurance that the design, fabrication, and testing of 62 the materials used in the reactor internals and core support structures are of high quality 63 standards and are adequate forto assure structural integrity. The controls imposed upon 64 components constructed of austenitic stainless steel satisfy the recommendationspositions of Regulatory Guide 1.31, "Control of Ferrite Content in 65 Stainless Steel Weld Metal," and Regulatory Guide 1.44, "Control of the Use of Sensitized Stainless Steel.," and the related criteria described in SRP Section 5.2.3, "Reactor Coolant Pressure Boundary Materials."66 DRAFT Rev. 3 - April 1996 4.5.2-8 The materials used for construction of components of the reactor internals and core support structures have been identified by specification and found to be in conformance 67 with the requirements of NG-2000 of Section III, Division 1 and Parts A, B, and C of 68 Section II of the ASME Code. In addition, the applicant has met the guidelines, of Regulatory Guide 1.85 by using materials of construction that are approved for use by ASME Code cases.For materials not in accordance with ASME Code provisions, the applicant has selected materials of construction that are approved for use in the acceptable ASME Code Cases described in Regulatory Guide 1.85 or that have otherwise been demonstrated acceptable for the application. As proven by extensive tests and 69 satisfactory performance, the specified materials are compatible with the expected environment and corrosion is expected to be negligible. The controls imposed on the reactor coolant chemistry provide