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:
tainless 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 position C.5 to prevent contamination which promotes stress corrosion cracking. Tools which contain materials that could contribute to stress-corrosion cracking or which, because of previous usage, may have become contaminated with such materials, should not be used on austenitic stainless steel surfaces.34 4.5.1-5 DRAFT Rev. 3 - April 1996 3. Other Materials All materials for use in this system must be selected for their compatibility with the reactor coolant, as described in Articles NB-2160 and NB-3120 of the Code. The tempering temperature of martensitic stainless steels and the aging temperature of precipitation-hardening stainless steels should be specified to provide assurance that these materials will not deteriorate because of stress corrosion cracking in service. Acceptable heat treatment temperature include aging at 565 - 595 C (1050 - 1100 F) for Type 35 17-4 PH and 565 C (1050 F) for Type 410 stainless steel. 36 37 4. Cleaning and Cleanliness Control Onsite cleaning and cleanliness control should be in accordance with Regulatory Guide 1.37, "Quality Assurance Requirements for Cleaning of Fluid Systems and Associated Components of Water-Cooled Nuclear Power Plants," and ANSI N45.2.1-1973, 38 "Cleaning of Fluid Systems and Associated Components During Construction Phase of Nuclear Power Plants."(Reference 12). The oxygen content of the water in vented 39 tanks is not required to be controlled. Vented tanks with deionized or demineralized water are a normal source of water for final cleaning or flushing of finished surfaces. Halogenated hydrocarbon cleaning agents should not be used. Technical Rationale40 The technical rationale for application of the above acceptance criteria to the control rod drive structural materials is discussed in the following