Document: NUREG-0800
Document ID: b17adfa2-7bfa-4f7d-9b7b-7a5df200327f
Document Type: srp
Title: REACTOR INTERNAL AND CORE SUPPORT MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340586.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.5.2
CFR Part: 
CFR Title: 

Content:
sions of the following type, to be included in the staff's safety evaluation report: 4.5.2-4 Rev. 2 - July 1981 The staff concludes that the materials used for the construction of the reactor internal and core support structure are acceptable and meet the requirements of General Design 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 GOC 1 and Section 50.55a of 10 CFR Part 50 with respect to assuring that the design, fabrication, and testing of the materials used in the reactor internal and core support structure are of high quality standards and adequate for structural integrity. The controls imposed upon components constructed of austenitic stainless steel satisfy the recommendations of Regulatory Guide 1.31," Control of Ferrite Content in Stainless Steel Weld Metal," and Regulatory Guide 1.44," Control of the Use of Sensitized Stainless Steel." The materials used for construction of components of the reactor internal and core support structure have been identified by specification and found to be in conformance with the requirements of NG-2000 of Section III and Parts A, B, and C of 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. As proven by extensive tests and satis- factory 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 reasonable assurance that the reactor internal and core support structure will be adequately protected during operation from conditions which could lead to stress corrosion of the materials and loss of component structural integrity. The material selection, fabrication practices, examination and testing proce- dures, and control practice performed in accordance to these