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:
ts (e.g., at joints between the heaters), at locations on each nozzle, and on any other component that is ex pected to be significantly affected by the annealing treatment. Measurements should be made with suffi cient frequency to identify any temperature excursions that could lead to violating the established temperature limits. When appropriate, the measurement devices should be in physical contact with the component when the temperature is being measured. The meas urement records should be retained for possible review and inspection by the NRC, in accordance with the re quirements of 10 CFR 50.71(c), until the facility li cense is terminated. The temperature measurements should be monitored and compared to pre-established tolerance bounds during heatup, steady-state opera tion, and cooldown to ensure that temperature and stress limits have not been exceeded. Stress limitations should be monitored by a proce dure established by the licensee that uses strain gauges or alternative methods, for example, deflection meas urements or temperature measurements. Experimen tal evidence of the validity of alternative methods should be provided. Measurements should be made to establish stress levels at the vessel locations of highest stress, on the vessel nozzles, on the flange, and on high-stress piping locations. This section should describe the measurement type, the number of measurements to be made for each component, measurement sensitivity, measure ment frequency, and recording method. 2.2 Inspection Program This section should describe the inspection pro gram proposed to affirm that the annealing operation has not damaged the reactor vessel or related equip ment, components, or structures. The inspection pro gram, as a minimum, should include a pre- and post anneal visual examination of critical regions of the vessel, piping, and any other equipment, component, or structure that might be affected by the annealing operation. The inspection program should also de scribe