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:
ment trend is determined from the surveillance results of a program that conforms to the intent of Appendix H of 10 CFR Part 50, once the surveillance program and results from the program have met the credibility re quirements in the PTS rule (10 CFR 50.61). 3.3 Use of Materials Test Reactor (MTR) Irradiations If archival pieces of the limiting vessel material are available, materials test reactor (MTR) irradiations may be used to evaluate the recovery and reembrittle ment trends. Plans for using archival material should be described in the assurance program, including the traceability of the material to the vessel, the proposed experimental matrix, and the method proposed for us ing the results of the MTR irradiations. 4. IDENTIFICATION OF UNREVIEWED SAFETY QUESTIONS AND TECHNICAL SPECIFICATION CHANGES Any changes to the facility that are described in the updated final safety analysis report as unreviewed safety questions and any changes to the technical spec ifications that are necessary to either conduct the ther mal annealing or operate the nuclear power reactor following the annealing should be identified in this sec tion. The section should demonstrate that the Com mission's requirements are complied with and that there is reasonable assurance of adequate protection to the public health and safety following the changes. S. COMPLETION OR TERMINATION OF THERMAL ANNEAL 5.1 Annealing Completed, In Compliance If the thermal annealing was completed in accor dance with the Thermal Annealing Operating Plan and the Requalification Inspection and Test Program, the licensee must so confirm in writing to the Director, Of fice of Nuclear Reactor Regulation (NRR). Within 15 days of the licensee's written confirmation that the thermal annealing was completed in accordance with the Thermal Annealing Plan, and prior to restart, the NRC will (1) briefly document whether the thermal an nealing was performed in compliance with the licens ee's Thermal Annealing Operating Plan and