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:
s are compatible with the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, as required by GDC 4. For the same reasons, these controls meet the requirements of GDC 14 that the RCPB have an extremely low probability of abnormal leakage and rapidly propagating failure. The controls imposed during welding of austenitic stainless steels in the RCPB are in accordance with the recommendations of Regulatory Guide 1.31, “Control of Ferrite Content in Stainless Steel Weld Metal”; [for BWRs only] the positions of Generic Letter 88-01 and/or the recommendations of NUREG-0313, Revision 2; Regulatory Guide 1.34; and Regulatory Guide 1.71. These controls provide reasonable assurance that welded components of austenitic stainless steel will not develop microfissures during welding and will have high structural integrity. Accordingly, these controls meet the quality standards requirements of GDC 1, GDC 30, and § 50.55a for welding of austenitic stainless steels in the RCPB, and, with respect to such welding, satisfy the requirements of GDC 14 that the RCPB have an extremely low probability of abnormal leakage and rapidly propagating failure. The fabrication controls for cast austenitic stainless steel components, in conjunction with acceptable base material and weld metal specifications, provide for welded joint inspectability and adequate fracture toughness to resist thermal aging for the design life. Accordingly, these controls therefore satisfy the applicable requirements of GDC 1, GDC 4, GDC 14, GDC 30, and § 50.55a for these RCPB materials. Accordingly, the staff concludes that the RCPB materials are acceptable and meet the requirements of General Design Criteria 1, 4, 14, 30, and 31 of Appendix A of 10 CFR Part 50; the requirements of Appendices B and G of 10 CFR Part 50; and the requirements of 10 CFR 50.55a of 10 CFR Part 50. The applicant described the Inservice Inspection and Inservice Testing Programs and its