Document: NUREG-0800
Document ID: fbf00155-ed67-4c5f-bb08-246909eb564a
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340601.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.3
CFR Part: 
CFR Title: 

Content:
The materials of construction for the RCPB are compatible with the thermal insulation used in these areas and are in conformance with the recommendations of Regulatory Guide 1.36, "Nonmetallic Thermal Insulation for Austenitic Stainless Steels." Conformance with the above recommendations satisfy the requirements of GDC 14 and GDC 31 relative to prevention of failure of the RCPB. 5.2.3-14 Rev. 2 - July 1981 The ferritic steel tubular products and the tubular products fabri- cated from austenitic stainless steel have been found to be accept- able by nondestructive examinations in accordance with the provisions of the ASME Code, Section III. Compliance with these Code require- ments satisfies the quality standards requirements of GDC 1, GDC 30 and §50.55a. The fracture toughness tests required by the ASME Code, augmented by Appendix G, 10 CFR Part 50, provide reasonable assurance that adequate safety margins against nonductile behavior or rapidly propagating fracture can be established for all pressure retaining components of the reactor coolant pressure boundary. The use of Appendix G of the ASME Code, Section III, and the results of fracture toughness tests performed in accordance with the Code and NRC regulations in estab- lishing safe operating procedures, provides adequate safety margins during operating, testing, maintenance, and postulated accident conditions. Compliance with these Code provisions and NRC regula- tions satisfies the requirements of GDC 31 and §50.55a regarding prevention of fracture of the reactor coolant pressure boundary. The controls imposed on welding preheat temperatures for welding ferritic steels are in conformance with the recommendations of Regulatory Guide 1.50, "Control of Preheat Temperature for Welding Low Alloy Steels." These controls provide reasonable assurance that cracking of components made from low alloy steels will not occur during fabrication and minimize the possibility of subsequent cracking due to residual stresses