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:
an (NUREG 0800) or on a case-by-case basis. The following is to be added to paragraph (5) of the Case: For these cases, it should be demonstrated by the owner that (1) the im pact test results for the material meet Code require ments and (2) the material is not subject to stress corro sion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sustained loads in service. N-249-11 05-13-91 Additional Material for Sub 02-12-93 section NF, Classes 1, 2, 3 and MC Component Supports fab ricated Without Welding, Sec tion III, Division 1 Code Case N-249-11 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: The fracture toughness re quirements apply only to piping supports and not to Classes 1, 2, and 3 component supports. The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with paragraph 5.3.4 of the USNRC Standard Review Plan (NUREG 0800) or on a case-by-case basis. The following is to be added to paragraph (e) of the Case: For these cases, it should be demonstrated by the owner that (1) the im pact test results for the material meet Code require ments and (2) the material is not subject to stress corro sion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sustained loads in service. 1.85-19 N-249-12 02-12-93 Additional Material for Sub 05-11-94 section NF, Classes 1, 2, 3, and MC Component Supports Fab ricated Without Welding, Sec tion III, Division 1 Code Case N-249-12 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: the fracture toughness re quirements apply only