Document: NUREG-0800
Document ID: b4808a6f-81dd-45c9-8350-c8d58808bcd4
Document Type: srp
Title: STEAM GENERATOR MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070446.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.2.1
CFR Part: 
CFR Title: 

Content:
sing; (c) tube support plate 8 expansion with cracking between hole ligaments; (d) wrapper distortion; (e) leg displacement of the smallest radius U-bend heat tube, and (f) tube leakage. The extent of the tube to tube sheet contact and the contact area of the tube/tube support are of particular interest. The reviewer will evaluate the design and material selection used to minimize the support plate corrosion. The tubes are commonly welded to the tube-sheet cladding and expanded into the tube sheet by rolling or explosive-expanding (explanding). Full depth expansion is the preferred design. A secondary review is performed by CMEB and the results are used by MTEB to complete the overall evaluation for the steam generator materials.9 B. EMCBCMEB will review the following areas related to secondary water chemistry. 10 11 Tthe results of its evaluation are transmitted to MTEB for incorporationed into the 12 13 SER: 1. Compatibility of the Steam Generator Components with the Primary and Secondary Coolant The possibility of stress-corrosion cracking, denting, pitting, and wastage of the tubes, as determined by the chemistry of both the primary and secondary coolants, isare reviewed. The methods to be used in monitoring and 14 maintaining the chemistry of the secondary coolant within the specified ranges are reviewed. The compatibility of austenitic and ferritic stainless steels, ferritic low alloy steels and carbon steels with the primary and secondary coolants is reviewed. 2. Cleanup of Secondary Side The provisions for access to, as well as the procedures and methods for, the removal of surface deposits, sludge, and corrosion products from the secondary side of the steam generator are reviewed. These provisions are to supplement the removal of sludge by blowdown. Review Interfaces: EMCB also performs the following reviews under the SRP sections indicated: 1. Reviews the adequacy of programs for assuring the integrity of bolting and threaded fasteners as part of its