Document: NUREG-0800
Document ID: d8b522d4-dee5-4122-89d4-b2b45d0ca729
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070420.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.3
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Materials and Chemical Engineering Branch (MTEB)(EMCB)1 Secondary - Chemical Engineering Branch (CMEB)None2 I. AREAS OF REVIEW The following areas, which relate to materials of the reactor coolant pressure boundary (RCPB) other than the reactor pressure vessel, which is covered in Standard Review Plan Section 5.3.1, "Reactor Vessel Materials," are reviewed by MTEB and CMEB EMCB as indicated. 3 1. Material Specifications The specifications for pressure-retaining ferritic materials, nonferrous metals and austenitic stainless steels, including weld materials, that are used for each component (e.g., vessels, piping, pumps, and valves) of the reactor coolant pressure boundary, are reviewed by MTEBEMCB . 4 The adequacy and suitability of the ferritic materials, stainless steels, and nonferrous metals specified for the above applications are determined. 2. Compatibility of Materials with the Reactor Coolant General corrosion and stress corrosion cracking induced by impurities in the reactor coolant can cause failures of the reactor coolant pressure boundary. DRAFT Rev. 3 - April 1996 5.2.3-2 The chemistry of the reactor coolant and the additives (such as inhibitors) whose function is to control corrosion are reviewed by CMEBEMCB as part of its primary review 5 responsibility for SRP Sections 5.4.8 and 9.3.4. CMEBEMCB reviews the compatibility of the materials of construction employed in the 6 RCPB with the reactor coolant, contaminants, or radiolytic products to which the system is exposed. The extent of the corrosion of ferritic low alloy steels and carbon steels in contact with the reactor coolant is reviewed. Similarly, a review by MTEB is made of possible uses of austenitic stainless steels in the 7 sensitized condition. The use of austenitic stainless steels in any condition in boiling water reactors (BWR's) requires special attention because of the oxygen content of BWR 8 coolant. 3. Fabrication and Processing of Ferritic Materials