Document: NUREG-0800
Document ID: 4a46b35d-2e81-4517-9716-154b19f57049
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190006.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.3
CFR Part: 
CFR Title: 

Content:
ollows: (a) According to the welding procedure qualification minimum preheat and maximum interpass temperatures should be specified and the welding procedure should be qualified at the minimum preheat temperature. For production welds, the preheat temperature should be maintained until a post-weld heat treatment has been performed. (b) Production welding should be monitored to verify that the limits on preheat and interpass temperatures are maintained. In the event that the above criteria are not met, the weld is subject to rejection. (2) The acceptance criteria for electroslag welds are presented in Regulatory Guide 1.34, “Control of Electroslag Weld Properties.” These criteria specify acceptable solidification patterns and impact test limits (for 5.2.3-10 Revision 3 - March 2007 qualification of welds in Class 1 and Class 2 components) and the criteria for verifying conformance during production welding. (3) Regulatory Guide 1.71, “Welder Qualification for Areas of Limited Accessibility,” provides the following criteria for requalification of welders: the performance qualification should require testing of the welder when conditions of accessibility to a production weld are less than 30 to 35 cm (12-14 inches) in any direction from the joint; and requalification is required for different restricted accessibility conditions or when any of the essential variables listed in the Code, Section IX, “Welding and Brazing Qualifications” are changed. Qualification of the welder or welding operators for limited accessibility may be waived provided that 100% radiographic and/or ultrasonic examination of the completed welded joint is performed. Examination procedures and acceptance standards should meet the requirements of the ASME Section III of the Code. Records of the examination reports and radiographs should be retained and made part of the Quality Assurance Documentation for the completed weld. (4) Regulatory Guide 1.43, “Control of Stainless Steel Weld