Document: NRC Regulatory Guide
Document ID: a4944d20-ef6e-480b-a45d-14425bedd2e5
Document Type: regulatory_guide
Title: ASME Code Cases Not Approved for Use (Rev. 8)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22196A065.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.193
CFR Part: 
CFR Title: 

Content:
acilities regulated by the NRC. 10/22/13 N-846 Certificate Holder Ability to Supply Polyethylene Material, Section III, Division 1 Code Case N-846 is not consistent with NRC position documented in NRC Information Notice IN 86-21, "Recognition of ASME Accreditation program for N Stamp Holders," and creates issues for verifying the effective implementation of a suppliers QA program. IN 86-21, Supplement 2, stated that the NRC's recognition of the ASME Accreditation Program applied only to the programmatic aspects of the QA programs and that holders of operating licenses or construction permits, and their subcontractors, are still responsible for ensuring that the suppliers are effectively implementing their approved QA programs. 7/25/14 N-881 Exempting SA-508 Grade 1A From PWHT Based on Measurement of Residual Stress in Class 1 Applications, Section III, Division 1 Additional work is needed in the areas of stress-free samples, multidirectional stress measurement, experimental validation, and measurement uncertainty. Therefore, the NRC staff has not accepted exempting SA-508 Grade 1A from PWHT based on measurement of residual stress using Instrumented Indentation Testing. 12/4/17 N-907 Rules for Performing Preservice Inspection (PSI) During Construction, Section III, Division 1 NRC disapproves this Code Case based on the following: This Code Case is for Part 52 plant using Inspections, Tests, Analyses and Acceptance Criteria (ITAAC), as stated in the background material for this action: “The current requirement in Section III, NB-5281(a) to complete PSI prior to completing N-5 Data Reports for Class 1 systems creates an issue with closing ITAACs for plants under construction with a 10CFR50 Part 52 Combined Operating License.” Since this is for specific regulatory issue concerning ITAAC, and not an ASME Code issue, it should be addressed on a case-by-case basis with the regulator instead of through the Code. Also, changing the N-5 Data Report to the N-3 Data Report