Document: NUREG-0800
Document ID: 49657ab1-eaec-40d0-9309-2d46c30c37bc
Document Type: srp
Title: -
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16029A367.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.2.1
CFR Part: 
CFR Title: 

Content:
e from a fabrication/manufacturing standpoint if they comply with 10 CFR 50.55a. In general, this regulation—specifically 10 CFR 50.55a(c), 10 CFR 50.55a(d), and 10 CFR 50.55a(e)—requires that the components satisfy the requirements of Section III of the ASME Code. Provisions in 10 CFR 50.55a(b) permit ASME Code cases, as discussed in Regulatory Guide (RG) 1.84, “Design, Fabrication, and Materials Code Case Acceptability, ASME Section III,” to be used to select, fabricate, and test materials for the steam generator. Section III of the ASME Code establishes—through articles such as NCA-1000, NB-2000 (for Class 1 components), and NC-2000 (for Class 2 components)— requirements for selecting, processing, testing, inspecting (during fabrication/manufacturing), and certifying materials. In general, Section III of the ASME Code references Parts C and D of Section II of the ASME Code for permitted material specifications (e.g., in Articles NB-2120 and NC-2120). Examples of materials that are currently used for Class 1 components in the steam generator include the following: Tubing: ASME SB-163, N06690, Thermally Treated Pressure Plates: ASME SA-533, Grade B, Class 1 Pressure Forgings ASME SA-508, Grade 3, Class 2 (including nozzles and (formerly referred to as Class 3a) tubesheet): Nozzle Safe Ends: ASME SA-182, F316LN Channel Heads: ASME SA-508, Grade 3, Class 2 (formerly referred to as Class 3a) Cladding, Buttering, ASME SFA 5.4 (308L, 309L), 5.9 and Welds: (308L, 309L), 5.11 (ENiCrFe-7), and 5.14 (ERNiCrFe-7) Pressure Boundary Welds: Low Alloy Steel, SFA 5.5, 5.23, 5.28 Manway Studs: ASME SA-193, Grade B7 Manway Nuts: ASME SA-194