Document: NRC Regulatory Guide
Document ID: 08cebcdf-2e81-4e08-a508-9f6b4701c0a5
Document Type: regulatory_guide
Title: Design, Fabrication, and Materials Code Case Acceptability, ASME Section III (Rev. 40)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22195A282.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.84
CFR Part: 
CFR Title: 

Content:
els, Section III, Division 1 2/21E DG-1405, Page 13 2. Conditionally Acceptable Section III Code Cases The NRC finds the Code Cases listed in Table 2 to be acceptable for application in the design and construction of components and their supports for water-cooled nuclear power plants within the limitations indicated by the NRC. Unless otherwise stated, limitations indicated by the NRC are in addition to the conditions specified in the Code Case. ASME publishes Code Cases quarterly in supplements to each edition. To assist users, new and revised Code Cases are shaded in grey to distinguish them from those approved in previous versions of this guide. For Code Cases previously listed in this guide, the third column of Table 1 lists the date of ASME approval. For new or revised Code Cases, the third column of Table 1 lists the supplement and edition in which each Code Case was published (e.g., “5/17E” means Supplement 5 to the 2017 Edition of the ASME BPV Code). Table 2. Conditionally Acceptable Section III Code Cases CODE CASE NUMBER TABLE 2 CONDITIONALLY ACCEPTABLE SECTION III CODE CASES TITLE/CONDITION DATE OR SUPPLEMENT/ EDITION N-62-7 Internal and External Valve Items, Section III, Division 1, Classes 1, 2, and 3 The Code requires that Class 1 and Class 2 valve manufacturers to meet the provisions of Section III, Article NCA-4000, “Quality Assurance.” Class 3 valve manufacturers must also meet the provisions of Article NCA-4000 because all Code Class valve items are subject to the licensee’s 10 CFR Part 50, Appendix B, approved quality assurance program. 2/3/03 N-71-21 Additional Materials for Subsection NF, Class 1, 2, 3, and MC Supports Fabricated by Welding, Section III, Division 1 (1) The maximum measured ultimate tensile strength (UTS) of the component support material must not exceed 170 ksi because of the susceptibility of high-strength materials to brittleness and stress-corrosion cracking. (2) In the last sentence of Paragraph 5.2 of Code Case