Document: NUREG-0800
Document ID: e6a79bdb-930d-4b57-91b9-39db4d8a76f1
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190010.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
racking (IGSCC) for susceptible boiling water reactors (BWR) austenitic stainless steel ESF piping are described in NUREG-0313 and in Attachment A to Generic Letter (GL) 88-01. The technical bases for the positions provided in GL 88-01 are detailed in NUREG-0313. These criteria are applied to piping specified in GL 88-01. GL 88-01 and NUREG-0313 criteria used for the evaluation of initial material selection and fabrication include welding controls (e.g., delta ferrite content limits) and material specifications (e.g., carbon content specifications) that are more stringent than specified in RGs 1.31 and 1.44 and should supplant the regulatory guides to assure adequate resistance of susceptible piping to IGSCC. B. Ferritic Steel Welding. To meet the requirements of GDC 1 related to general quality assurance and codes and standards; Appendix B to 10 CFR Part 50, related to control of special processes; and 10 CFR 50.55a, the following acceptance criteria for ferritic steel welding should be used: i. The amount of minimum specified preheat must be in accordance with the recommendations of the Code, Section III, Appendix D, Article D-1000, and RG 1.50, unless an alternate procedure is justified. ii. Moisture control on low hydrogen welding materials shall conform to the requirements of the Code, Section III, Articles NB, NC, ND-2000 and 4000, and AWS D1.1, unless alternate procedures are justified. iii. For areas of limited accessibility, the criteria of Regulatory Guide 1.71 apply a discussed in SRP Section 10.3.6. 6.1.1-7 Revision 2 - March 2007 2. Composition and Compatibility of ESF Fluids. In meeting the requirements of GDC 4 and 41 that SSCs important to safety are designed to accommodate the effects of and to be compatible with environmental conditions associated with normal operation, maintenance, testing, and postulated accident conditions, including loss-of-coolant accidents, and to assure that the concentration of hydrogen in the containment atmosphere