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:
st Program. If unreviewed safety questions or changes to technical specifications are identified as necessary for resumed operation, the licensee may restart only after the Director of NRR au thorizes restart and the public meeting on the thermal annealing is held. According to 10 CFR 50.66(d), every licensee who either completes a thermal annealing or termi nates an annealing but elects to take full or partial credit for the annealing must provide a Thermal An nealing Results Report detailing (1) the time and tem perature profiles of the actual thermal anneal, (2) the post-anneal RTNDT and Charpy upper-shelf energy values of the reactor material to be used in subsequent operations, (3) the projected postanneal reembrittle ment trends for both RTNDT and Charpy upper-shelf energy, and (4) the projected values of RTpTS and Charpy upper-shelf energy at the end of the proposed period of operation addressed in the application. The report must be submitted within three months of com pleting the thermal anneal, unless an extension is au thorized by the Director of NRR. C. FORMAT AND CONTENT FOR THE THERMAL ANNEALING REPORT The format described here is acceptable to the NRC staff for the Thermal Annealing Report that is to be submitted to the Director of NRR for annealing a reactor vessel to restore fracture toughness of the reac tor vessel material. This format addresses the contents of the Thermal Annealing Operating Plan, the Requal ification Inspection and Test Program, the Fracture Toughness Recovery and Reembrittlement Trend As surance Program, and the Identification of Unre viewed Safety Questions and Technical Specifications Changes. It also describes acceptance criteria that the staff will use in evaluating the applicant's proposed 1.162-4 K K programs for determining fracture toughness recovery and establishing reembrittlement rates. This regulatory guide applies to thermal annealing procedures that use heaters (electric or gas) for heating the reactor vessel, )