Document: NUREG-0800
Document ID: d4acff25-51e1-4891-b590-9ad78ef4833e
Document Type: srp
Title: REACTOR VESSEL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340633.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.1
CFR Part: 
CFR Title: 

Content:
eference temperature at the end of the service lifetime of the reactor vessel, and their withdrawal schedules, shall be in accordance with the require- ments of paragraph II.C.3 of Appendix H. (4) For multiple reactors located at a single site, an integrated surveillance program may be authorized by the Commission on an individual case basis, depending on the degree of commonality and the predicted severity of irradiation. 7. Reactor Vessel Fasteners The acceptance criteria for the reactor vessel bolting material are given by paragraph IV.A.3 of Appendix G to 10 CFR Part 50 and by the recommen- dations of Regulatory Guide 1.65, "Materials and Inspections for Reactor Vessel Closure Studs." These acceptance criteria satisfy the quality standards requirements of GDC 1, GDC 30, and § 50.55a, and meet the requirements of GDC 31 regarding prevention of fracture of the RCPB. 5.3.1-7 Rev. 1 - July 1981 Regulatory Positions C.1 and C.2 of Regulatory Guide 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 11 of the ASME Code. b. The fastener material should not have an ultimate tensile strength over 170 ksi, and the fracture toughness tests and acceptance levels of paragraph IV.A.3 of Appendix G to 10 CFR Part. 50 must be met as detailed in paragraph NB-2333.of Section III of the Code. c. Surface treatments, plating, or thread lubricants used must be shown to be compatible with the materials, and stable at operating temper- atures. d. Nondestructive examination should be performed according to Section III of the Code, subarticle NB-2580, and including additional recom- mendations given in Regulatory Position C.2 of Regulatory Guide 1.65. III. REVIEW PROCEDURES The reviewer will select and emphasize material from the procedures described below, as may be appropriate for a particular case. For