Document: NUREG-0800
Document ID: 78c093cc-6cc4-4fac-aea2-087f774d42c3
Document Type: srp
Title: CONTROL ROD DRIVE STRUCTURAL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070414.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.5.1
CFR Part: 
CFR Title: 

Content:
ic acceptance criteria necessary to meet the relevant requirements of GDC 1, 14, and 26 and Section 50.55a of 10 CFR Part 50 are as follows: 1. Materials Specifications The properties of the materials selected for the control rod drive mechanism must be equivalent to those given in Appendix I to Section III, Division 1 of the ASME Boiler and Pressure Vessel Code (hereinafter "the Code"), or in Parts A, and B, and C of 24 25 26 Section II of the Code. or are included in Regulatory Guide 1.85, "Code Case Acceptability ASME Section III Materials," except that c Cold-worked austenitic 27 stainless steels shall have a 0.2% offset yield strength no greater than 620 MPa (90,000 psi) , to reduce the probability of stress corrosion cracking occurring in these systems. 28 Regulatory Guide 1.85, "Code Case Acceptability ASME Section III Materials,"29 describes the acceptable code cases that may be used in conjunction with the above specifications. 2. Austenitic Stainless Steel Components 30 Acceptance criteria used are similar to include criteria described in SRP Section 5.2.3, subsections II.4.a, b, d, and e and the criteria described below.31 Regulatory Guide 1.44, "Control of the Use of Sensitized Stainless Steel," describes 32 acceptance methods for preventing intergranular corrosion of stainless steel components. Furnace-sensitized material should not be allowed, and methods described in this guide should be followed for cleaning and protecting austenitic stainless steels from contamination during handling, storage, testing, and fabrication, and for determining the degree of sensitization that occurs during welding. Regulatory Guide 1.31, "Control of Ferrite Content in Stainless Steel Weld Metal," describes acceptance criteria for 33 assuring the integrity of welds in stainless steel components of these systems. The controls for abrasive work on austenitic stainless steel surfaces should, as a minimum, be equivalent to the controls described in Regulatory Guide 1.37