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:
lation is employed or a nonmetallic insulation which meets the criteria of Regulatory Guide 1.36 is used. The acceptance criteria for nonmetallic insulation for stainless steel are based on the levels of leachable contaminants in the material and are presented in position C.2.b and Figure 1 of the guide. D. The acceptance criteria for control of welding of austenitic stainless steels are based on NUREG-0313 as described below and on Regulatory Guides 1.31, 1.34, and 1.71, to satisfy the quality standards requirements of GDC 1, GDC 30, and 10 CFR 50.55a. The acceptance criteria for delta ferrite in austenitic stainless steel welds are given in Regulatory Guide 1.31, “Control of Ferrite Content in Stainless Steel Weld Metal.” These acceptance criteria cover (1) verification of delta ferrite content of filler metals, (2) ferrite measurement, (3) instrumentation, (4) acceptability of test results, and (5) documentation of weld pad verification tests. For the BWR austenitic stainless steel RCPB piping specified in Generic Letter 88-01, the weld metal ferrite content should be controlled as described in the positions of Attachment A to Generic Letter 88-01 or the recommendations of NUREG-0313, Revision 2. The acceptance criteria for electroslag welds in austenitic stainless steel are given in Regulatory Guide 1.34, “Control of Electroslag Weld Properties.” These criteria specify acceptable solidification patterns for qualification of austenitic stainless steel welds and the basis for verifying conformance during production welding. Regulatory Guide 1.71 provides the following criteria for requalification of welders: (1) 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. (2) Requalification should be required for different restricted accessibility conditions or when other essential variables listed in the Code, Section IX,