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:
ntify the location and method of attachment for the specific instrumentation, including all temperature measure ment devices applied to the vessel and other structures and components. A history of the times and tempera tures for each temperature measurement device should be included, showing the actual temperatures for the beginning of annealing, the heat-up period, the , steady-state conditions, and the cool-down period. Sufficient detail should be included to permit determi nation of the heat-up and cool-down rates and the vari ations in temperature measurements during the entire cycle. A summary of key measurements should be pro vided that shows that the proposed annealing condi tions, specifically the time and temperature parameters and stress allowables established in the application, were not exceeded. Additionally, a summary of the worker exposures incurred during the annealing proc ess should be included. 6.2 Evaluation of Requalificatlon Inspections and Tests The results and evaluations of any inspections and tests used to requalify the annealed reactor vessel, the attached piping or appurtenances, and the adjacent concrete structures should be reported. The Thermal Annealing Results Report should include the results of all inspections and tests to demonstrate that the an nealing operation has not caused degradation of the reactor vessel, the insulation, the attached piping or appurtenances, containment, and the adjacent con crete to a degree that could affect the safe operation of the reactor. The report should describe the evaluation and disposition of any indications detected during the post-anneal inspections. 6.3 Determination of Percent Recovery The method for determining the percent recovery of RTNDT and Charpy upper-shelf energy should be described. The actual time-temperature parameters of the vessel annealing operation should be used and re ported. If the percent recovery is determined from testing credible surveillance specimens or from testing