Document: NRC Regulatory Guide
Document ID: a2b67b51-f5fe-4c86-a879-f0e439601f7f
Document Type: regulatory_guide
Title: Format and Content of Report for Thermal Annealing of Reactor Pressure Vessels
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740052.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.162
CFR Part: 
CFR Title: 

Content:
ling time and temperature proposed in the application. The operating history of the reactor prior to an nealing should be described in this section, including the power-time-temperature history during power op erations to permit evaluation of temperature and flu ence conditions for the reactor vessel; these data may be either actual recorded data or data deduced from other plant information that is identified as such. The specific reactor vessel beitline temperatures during the reactor operation should be reported. This section should describe the results of the on going surveillance program, including the number of specimens, initial values for the reference temperature *> (RTNDT) and Charpy upper-shelf energy, and all data on shifts of RTNDT and decrease of Charpy upper shelf energy. It should also provide the pre-annealing RTNDT and Charpy upper-shelf energy values, deter mined by either analysis or testing. 1.2 Description of the Reactor Pressure Vessel This section of the report should provide a de tailed description of the reactor pressure vessel and identify those parts of the vessel to be annealed. It should also include all vessel data used for determining the Thermal Annealing Operating Plan, the proposed inspections and tests, and the programs for recovery and reembrittlement. Information to be reported on each heat of materi al in the reactor vessel beltline region should include material compositions, including all elements relevant to irradiation behavior, mechanical properties, fabri cation techniques, nondestructive test results, and neutron fluence exposures. The initial RTNDT as spec ified in Branch Technical Position MTEB-5-2 in NUREG-0800 (Ref. 12) and NB-2300 of the ASME Boiler and Pressure Vessel Code (Ref. 13), along with the initial Charpy upper-shelf energy as defined in ASTM Standard E 185 (Ref. 14), should be reported for each heat of material. Material heats of base metal and weld metal that will be used for measuring percent recovery and