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:
ring fabrication and processing of austenitic stainless steels. The use of sensitized stainless steels should be controlled to prevent stress-corrosion cracking of the material during operation of the plant. Welding procedures should be controlled to reduce the probability of sensitization and microfissure formation. Cold- worked stainless steels should not have high yield stress, to reduce the probability of stress-corrosion cracking during operation of the plant. 3. Other Materials Special requirements for the other materials other than austenitic stainless steels include 4 tempering and aging temperatures for martensitic and precipitation-hardening stainless steels to prevent their deterioration by stress corrosion during operation of the plant. The compatibility of these materials with the reactor coolant is reviewed to assure that they will continue to perform satisfactorily throughout the life of the component. Metallic and non-metallic materials used in the control rod drive mechanism and not included in Appendix I to Section III, Division 1 of the ASME Boiler and Pressure 5 Vessel (B&PV) Code (Reference 9, hereinafter "the Code") are identified. 6 7 4. Cleaning and Cleanliness Control Proper care should be taken in handling the materials and parts of the control rod drive mechanism during fabrication, shipping, and onsite storage to assure that all cleaning solutions, processing compounds, degreasing agents, and other foreign materials are completely removed, and that all parts are dried and properly protected following any flushing treatment with water. Review Interfaces8 EMCB also performs the following related reviews under the SRP Sections indicated: 1. Evaluates the adequacy of programs for assuring the integrity of bolting and threaded fasteners as part of its primary review responsibility for SRP Section 3.13 (proposed).9 2. Evaluates the portions of the control rod drive system that are part of the reactor coolant pressure boundary (RCPB) and