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:
id systems. The design specifications should establish and justify these designations. 12/16/74 1607 Stress Criteria for Section III, Classes 2 and 3 Vessels Subjected to Upset, Emergency, and Faulted Operating Conditions Code Case 1607 was acceptable subject to the interpretation that the stress limit designations of “Upset,” “Emergency,” and “Faulted” do not necessarily imply agreement with specified plant conditions that apply to ASME Code Class 2 and 3 components for fluid systems. The design specifications should establish and justify these designations. 11/4/74 1618 Material for Core Support Structures, Section III, Subsection NG 3/3/75 DG-1405, Page 50 CODE CASE NUMBER TABLE 5 CODE CASES THAT HAVE BEEN SUPERSEDED BY REVISED CODE CASES ON OR AFTER JULY 1, 1974 REVISION DATE (1) Welding of age-hardenable Alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the material is in a solution-treated condition. (2) Use of alloy ASTM A-564 Grade 631 is not acceptable on a generic basis. 1618-1 Material for Core Support Structures, Section III, Subsection NG Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the material is in a solution-treated condition. 3/1/76 1626 Normalized and Tempered 1-1/4 Cr Low Alloy Steel Forgings, Section I, Section III, and Section VIII, Division 1 and 2 1/8/79 1634 1634-1 Use of SB-359 for Section III, Class 3 Construction 8/12/74 8/13/76 1644 1644-1 1644-2 1644-3 Additional Materials for Component Supports, Section III, Subsection NF, Class 1, 2, 3, and MC Construction The maximum measured UTS of the component support material should not exceed 170 ksi. 4/28/75 6/30/75 11/3/75 3/1/76 1644-4 1644-5 1644-6 Additional Materials for Component Supports and Alternate Design Requirements for Bolted Joints, Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Construction The maximum measured UTS of the component support material should not exceed 170 ksi because of