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:
g used as a model for this code case is very specific to source verifications and is documented in Columbia Generating Station’s Safety Evaluation (SE) dated July 22, 2020. As currently written, the requirements described in the proposed code case are not consistent with those detailed in the Columbia SE or are simply not described in the code case and left up to the organization to determine what those requirements should be. 2. As currently written, the code case is not limited just for use during a public health emergency but can be implemented at any time. This is not consistent with the NRC’s approved alternative to Appendix B to 10 CFR Part 50, as documented on the Columbia SE, which is limited for use during an exigent condition, nor does it meet the requirements of Criterion VII of Appendix B which requires inspections/audits to be at the source. 3. In addition, as currently written, the code case doesn’t have an end date. Exigent conditions are expected to have an end date, and an end date is needed for consistency with other similar code cases approved by the NRC. 1/21E DG-1408, Page 15 2. Unacceptable Section XI Code Cases The NRC determined that the following Section XI Code Cases are unacceptable for use by licensees in their Section XI inservice inspection programs. To assist users, new Code Cases are shaded in grey to distinguish them from those listed in previous versions of this guide. Table 2. Unacceptable Section XI Code Cases CODE CASE NUMBER TABLE 2 UNACCEPTABLE SECTION XI CODE CASES SUMMARY DATE OR SUPPLEMENT/ EDITION N-560-2 Alternative Examination Requirements for Class 1, Category B-J Piping Welds, Section XI, Division 1 (1) The Code Case does not address inspection strategy for existing augmented and other inspection programs such as intergranular stress-corrosion cracking (IGSCC), flow-assisted corrosion (FAC), microbiological corrosion (MIC), and pitting. (2) The Code Case does not provide system-level guidelines for change in risk