Document: NUREG-0800
Document ID: 2f470ae0-e3dd-42c9-9e54-b33682023619
Document Type: srp
Title: CONTROL ROD DRIVE STRUCTURAL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0702/ML070230007.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.5.1
CFR Part: 
CFR Title: 

Content:
rial from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. Material Specifications. The reviewer compares the properties of the material proposed for the control rod system to the criteria of Section III, Appendix I, Division 1 of the Code, Section II, Parts A, B, C and D of the ASME Code, or acceptable material code cases described in RG 1.85. The reviewer verifies whether cold-worked austenitic stainless steels used in fabrication of the reactivity control mechanisms comply with Subsection II.1 of the ASME Code. 2. Austenitic Stainless Steel Components. Review procedures include those described in SRP Section 5.2.3, Subsections III.4.D and E. The reviewer examines the applicant’s 1) methods of controlling sensitized stainless steel and compares them to the positions of RG 1.44, especially as to cleaning and protection from contamination during handling and storage, 2) verification of non-sensitization of the material, and 3) qualification of the welding process for production. The qualification of the welding process uses the American Society for Testing and Materials (ASTM), A-262-1970, "Detecting Susceptibility to Intergranular Attack in Stainless Steels”; Practice A "Oxalic Acid Etch Test for Classification of Etch Structures of Stainless Steels”; Practice E, "Copper-Copper Sulfate-Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Stainless Steels”; and the Annual Book of ASTM Standards. If the applicant proposes alternative methods of testing the qualification welds for degree of sensitization, the reviewer determines whether these are satisfactory, taking into account branch positions