Document: NUREG-0800
Document ID: 6cdd237d-c5b3-4a09-8753-54cfe1fea503
Document Type: srp
Title: REACTOR VESSEL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190007.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.1
CFR Part: 
CFR Title: 

Content:
s located at a single site, an integrated surveillance program may be authorized by the Commission on an individual case basis in accordance with the requirements of paragraph III.C of Appendix H. The material surveillance program criteria of ASTM E-185 cited in 10 CFR Part 50, Appendix H, is predicated on an assumed 40-year reactor vessel design life. For those applicants proposing a facility with greater than a 40-year design life, the criteria of ASTM E-185 must be supplemented to provide for monitoring of the reactor vessel materials for the entire reactor vessel design life. Operational Programs. For COL reviews, the description of the operational program and proposed implementation milestone(s) for the Reactor Vessel Material Surveillance Program are reviewed in accordance with 10 CFR 50.60 and 10 CFR 50, Appendix H. The Reactor Vessel Material Surveillance Program and associated implementation milestone(s) are included within the license condition on operational program implementation. Revision 2 - March 2007 5.3.1-10 7. Reactor Vessel Fasteners. The acceptance criteria for the reactor vessel bolting material are given by paragraph IV.A of Appendix G to 10 CFR Part 50 and by the recommendations of RG 1.65, “Materials and Inspections for Reactor Vessel Closure Studs.” These acceptance criteria satisfy the quality standards requirements of GDC 1, GDC 30, and 10 CFR 50.55a, and meet the requirements of GDC 31 regarding prevention of fracture of the RCPB. Regulatory Positions C.1 and C.2 of RG 1.65 recommend the following: A. Materials for reactor vessel studs (and other fasteners) that are considered suitable are SA-540 Grades B-23 and B-24, SA-193 Grade B-7, SA-194 Grade 7, and SA-320 Grade L-43, as presented in Section II of the ASME Code. B. The fastener material should not have an ultimate tensile strength over 1170 MPa (170 ksi), and the fracture toughness tests and acceptance levels of NB-2333 of Section III of the Code must be met as required by