Document: NUREG-0800
Document ID: 866c6ef6-2f4a-45c7-9e71-43e1f66a8422
Document Type: srp
Title: Draft Revision 3– July 2018
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1807/ML18071A066.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
CFR Part: 
CFR Title: 

Content:
the requirements delineated on this topic concerning both the TS and PTLR. 3. Inservice Surveillance of Fracture Toughness The reactor vessel may be exposed to significant neutron radiation during the service life. This will affect both the tensile and toughness properties. A material surveillance program in conformance with Appendix H, “Reactor Vessel Material Surveillance Program Requirements,” 10 CFR Part 50, must be carried out. 3.1 Surveillance Program Requirements The minimum requirements for the surveillance program are covered by Appendix H, 10 CFR Part 50. The selection of material to be included in the surveillance program should be in accordance with ASTM E-185-82, as incorporated by reference into Appendix H of 10 CFR Part 50, unless the intent of the program is better realized by using more rigorous criteria. For example, the approach of estimating the actual RTNDT and upper shelf toughness of each plate, forging, or weld in the beltline as a function of service life, and choosing as the surveillance materials those that are expected to be most limiting, may be preferable in some cases. This would include consideration of the initial RTNDT, the upper shelf toughness, the expected radiation sensitivity of the material (based on copper and nickel content, for example) and the neutron fluence expected at its location in the vessel. Some plants have received approval to join Integrated Surveillance Programs (ISP) in which case their surveillance program requirements are delineated in the relevant NRC safety evaluation for ISP approvals. 3.2 Safety Analysis Report Criteria With respect to the adequacy of the surveillance program, information requested for beltline materials includes the following: (1) Tensile properties. (2) Dropweight test and Charpy V test results used to determine RTNDT. BTP 5-3-7 Draft Revision 3 – July 2018 (3) Charpy V test results to determine the upper shelf toughness. (4) Composition, specifically the copper and nickel