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:
e 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 does not resolve the issue of completing PSI since it remains required and necessary to close the ASME Code ITAAC in a timely manner before the 10 CFR 52.103(g) finding. The background implies that PSI is not required by Section III and not needed for the N-5 Data Report and is holding up closing the ITAAC. However, the NRC notes that PSI is an ASME Code, Section III requirement (NB-5281 and NB-5282), and therefore completing the PSI is part of closing out the applicable ITAAC that states that all requirements of 1/21E DG-1408, Page 13 CODE CASE NUMBER TABLE 1 UNACCEPTABLE SECTION III CODE CASES SUMMARY DATE OR SUPPLEMENT/ EDITION Section III are met. As stated in the background material of this proposed action, the N-5 Data Report is the document used to close out the ITAAC. Therefore, changing the completion of PSI to the N-3 Data Report would not support the review of closing the ITAAC since the N-3 Data Report is completed just prior to the 10 CFR 52.103(g) finding. To close out the applicable ITAAC and meet the FSAR, PSI must be completed prior to completing the N-5 Data Report. In addition, the staff’s position is that welds with unacceptable flaws cannot be placed in service unless they are repaired and made Code compliant, or the licensee seeks and is granted a proposed alternative to place the components in service with the flaws in place. This position has been documented in rulemaking (RG 1.193, Revision 6 in Final rule for 2015- 2017 edition). Therefore, due to the limited time between N-3 Data Report and 10 CFR 52.103(g) finding, this repair or alternative 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