Document: NUREG-0800
Document ID: 48fcca4d-4efe-4600-b4ca-9911efb87843
Document Type: srp
Title: and 5.2.1.2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070446.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.1.1
CFR Part: 
CFR Title: 

Content:
g due to corrosion. Thermally treated Inconel 690 alloy has improved corrosion resistance in comparison to Inconel 600 alloy previously used in steam generator applications. Where nickel-chromium-iron alloys are proposed for use in the steam generator, the reviewer verifies that an acceptable technical basis is either identified (based upon demonstrated satisfactory use in similar applications) or presented by the applicant to support use of the material under the expected environmental conditions.42 The reviewer verifies that appropriate bolting material has been selected which will perform adequately under the expected service conditions and which is not subject to stress corrosion cracking. Regulatory Guide 1.65 provides guidance for the design of reactor vessel closure studs which is also appropriate for the selection of suitable steam generator bolting material.43 2. Steam Generator Design The reviewer examines the design of the steam generators to verify that tight crevice areas where tubes pass through the tube supports and tube plate(s) are minimized, as discussed in subsection II.A.2 of this SRP section. 44 The reviewer verifies that an adequate corrosion allowance that meets Section III of the ASME Code and accounts for the design life of the plant has been specified.45 DRAFT Rev. 3 - April 1996 5.4.2.1-10 B. Chemistry ReviewSecondary Reviewer46 1. Compatibility of the Steam Generator Tubing with the Primary and Secondary Coolant The reviewer examines the controls to be placed on the composition of the primary and secondary coolants to determine that they meet the acceptance criteria cited in subsection II.B.1 of this SRP section. 2. Cleanup of Secondary Side The reviewer examines the design provisions that allow implementation of the procedures and methods to be used for removal of surface deposits, sludge, and corrosion products from the tube sheet and the tube/tube support areas. For standard design certification reviews under 10 CFR Part 52, the