Document: NRC Regulatory Guide
Document ID: 44b58049-ac63-457b-a075-ef162b34cb70
Document Type: regulatory_guide
Title: Materials code case Acceptability - - ASME Section III, Division 1 (Rev. 31)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740365.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.85
CFR Part: 
CFR Title: 

Content:
y 690 With a Minimum Yield Strength of 35 ksi, Class 1 Components, Section III, Divi sion 1 N-474-1 03-05-90 03-05-93 12-09-93 Design Stress Intensities and Yield Strength Values for UNS N06690 With a Minimum Spe cified Yield Strength of 35 ksi, Class 1 Components, Section III, Division 1 N-492 12-03-90 Grade 9 Titanium Alloy, Sec 05-11-94 tion III, Division I, Class 1, 2, and 3 N-497 05-13-91 Use of Fe-Ni-Cr-Mo-N 12-09-93 (CN-3MN) Cast Materials, Section III, Division 1, Class 2 and 3 Construction 4. UNACCEPTABLE CODE CASES Code Cases for Class 1 components that are not on the approved list of this guide (paragraph C.1) or other regulatory guides, or for which authorization by the Commission has not been granted, are not acceptable for Class 1 components. Code Cases for other classes of components that are not on the approved list of this guide (paragraph C.1) or other regulatory guides should be considered not acceptable on a generic basis. D. IMPLEMENTATION The purpose of this section is to provide informa tion to applicants regarding the use of this regulatory guide. 1. Except for those Code Cases that have been an nulled by action of the ASME, the NRC staff has found the Code Cases listed in the final version of this regulatory guide under Regulatory Position 1 acceptable for appropriate use. Other Code Cases may be considered for use in accordance with foot note 6 of the Codes and Standards rule, 10 CFR 50.55a. 2. Components ordered to a specific version of a Code Case need not be changed because a subsequent re vision of the Code Case is listed as the approved version in this guide. 3. Components ordered to a Code Case that was pre viously approved for use need not be changed be cause the Code Case has been subsequently an nulled. 4. Code Cases on the approved list may be applied to components that were in the process of construc tion prior to the effective date of the Code Case within the limits specified in the Code Case and ap plicable regulations or