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:
could not be accomplished if this was performed with the N-3 Data Report. Performing the PSI up to the 10 CFR 52.103(g) finding and not evaluating the flaws could leave significant flaws to grow to an unacceptable size between inspections, thus reducing structural margin and potentially challenging the structural integrity of safety related Class 1 and Class 2 piping. This is consistent with the position to disapprove CC N-813 for leaving PSI flaws in place as documented in RG 1.193. N-915 Extension of Internal Audit and Supplier Audit Due Dates in Exigent Conditions Section III, Division 1; Section III, Division 2; Section III, Division 3; Section III, Division 5 NRC disapproves this Code Case based on the following: 1. The code case should be broken into two code cases: one for internal audits and one for external audits because the Appendix B requirements and NRC approved alternatives to Appendix B requirements are different. Internal audits are governed by the requirements of Criterion XVIII, “Audits,” of Appendix B to 10 CFR Part 50 while the requirements for external audits are governed by the requirements of Criterion VII, “Control of Purchased Material, Equipment, and Services,” of Appendix B to 10 CFR Part 50. Creating separate code cases for internal audits and external audits will ensure that the requirements for each are addressed appropriately and consistently with Appendix B or NRC approved alternatives to Appendix B. a. For internal audits, the NRC’s approved alternative is limited to a maximum of 25 percent of the internal audit interval (a maximum of 3 months). This approved alternative allows internal audits on an annual (12 month) frequency to be extended up to 15 months. In addition, the NRC’s approved alternative states that “When an audit interval extension greater than one month is used, the next audit for that particular audit area will be scheduled from the original anniversary month rather than from the month of the extended