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:
has exposed low-alloy steels. If this were to occur in a U.S. nuclear facility the NRC staff would want to review the particular circumstances on a case-by- case basis. Any licensee that wants to use Code Case N-840 should submit it to the NRC for review and approval in accordance with 10 CFR 50.55a(z). 1/23/14 N-868 Third-Party NDE Certification for Non-U.S. Plant Sites, Section XI, Division 1 The NRC has not reviewed ISO 9712:2012 and does not allow for the use of ISO 9712:2012 for the certification of NDE personnel. Additionally, the scope of the code case is for facilities outside of the USA and cannot be used for licensees in the USA. 0/17E N-897 Analytical Evaluation Procedures for Axial Flaws in Partial-Penetration Nozzle Welds, Section XI, Division 1 Code Case N-897 applies to non-Code repair techniques that have been implemented in the U.S. via relief requests per NRC regulations. The NRC's relief request process allows the staff to review and approve appropriate NDE procedures that otherwise have not been established for these repairs as part of N-897. Application of N-897 allows the Owner to determine that a repaired flaw is acceptable, avoiding the need to submit a relief request to the NRC. In that case, the staff could not review and approve the NDE procedures applied to the repair. 0/21E DG-1408, Page 21 CODE CASE NUMBER TABLE 2 UNACCEPTABLE SECTION XI CODE CASES SUMMARY DATE OR SUPPLEMENT/ EDITION N-909 Primary Water Stress Corrosion Crack Growth Rate Curves for Alloy 690 Materials and Associated Weld Materials Alloys 52, 152, and Variant Welds Exposed to Pressurized Water Reactor Environments, Section XI, Division 1 The NRC staff finds insufficient technical basis to support the formal review of this code case at this time. The NRC questions the technical basis for the exclusion of data from the analysis to develop the FOIs as presented in Code Case N-909. 7/19E DG-1408, Page 22 3. Unacceptable OM Code Cases The NRC determined that the following OM