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:
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 a nondestructive examination program for the reactor vessel beltline region that will ensure that the vessel will continue to perform its safety function after the annealing operation. The description of the inspec tion program should include acceptance criteria, type 1.162-8 K K and number of examinations, qualification require ments, and reporting requirements. ) 2.3 Testing Program This section should describe the testing program that will be performed to demonstrate the effectiveness of the annealing operation and to assure that the reac tor vessel, attached piping and appurtenances, and ad jacent concrete will continue to perform their intended safety function following the annealing operation. This program is expected to be unique to each plant and should be established by the applicant. The testing pro gram may, for example, test the effects on the vessel of annealing, the integrity of the concrete, the operability of instrumentation, and the post-anneal functioning of affected components, equipment, and structures. 3. FRACTURE TOUGHNESS RECOVERY AND REEMBRITrLEMENT ASSURANCE PROGRAM The fracture toughness recovery and reembrittle ment assurance program should describe the methods to be used for quantifying the percent recovery, the reembrittlement trend and for establishing the post anneal RTNDT and Charpy upper-shelf energy values. These tasks are important for evaluation of the safety margins of the reactor pressure vessel in subsequent operating periods. The methods outlined below pro vide experimental and computational means for quan tifying both the recovery of fracture toughness follow ing the thermal anneal and the reembrittlement rate with subsequent plant operation. 3.1 Fracture Toughness Recovery Program This section of the assurance program should de