Document: NRC Regulatory Guide
Document ID: a1541707-8144-409c-8842-4ea7d4b8ef4e
Document Type: regulatory_guide
Title: 10/2019 (Rev. 19)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1912/ML19128A244.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.147
CFR Part: 
CFR Title: 

Content:
50-percent through-wall in a dissimilar metal weld from the ID, the flaw shall be considered to have an indeterminate depth. 0/15E N-696-1 Qualification Requirements for Mandatory Appendix VIII Piping Examinations Conducted from the Inside Surface Section XI, Division 1 Examiners qualified using the 0.25 RMS error for measuring the depths of flaws using Code Case N-696-1 in dissimilar metal or austenitic welds are not qualified to depth-size ID surface-breaking flaws greater than 50-percent through-wall in dissimilar metal or austenitic welds 2.1 inches or greater in thickness. If an examiner qualified using Code Case N-696-1 measures a flaw as greater than 50-percent through-wall in a dissimilar metal or austenitic weld from the ID, the flaw shall be considered to have an indeterminate depth. 6/13E RG 1.147, Rev. 19, Page 17 CODE CASE NUMBER TABLE 2 CONDITIONALLY ACCEPTABLE SECTION XI CODE CASES CONDITION DATE OR SUPPLEMENT/ EDITION N-702 Alternative Requirements for Boiling Water Reactor (BWR) Nozzle Inner Radius and Nozzle-to-Shell Welds, Section XI, Division 1 The applicability of Code Case N-702 for the first 40 years of operation must be demonstrated by satisfying the criteria in Section 5.0 of NRC Safety Evaluation regarding BWRVIP-108 dated December 18, 2007 (ML073600374) or Section 5.0 of NRC Safety Evaluation regarding BWRVIP-241 dated April 19, 2013 (ML13071A240). The use of Code Case N-702 in the period of extended operation is not approved. If VT-1 is used, it shall utilize Code Case N-648-2, “Alternative Requirements for Inner Radius Examination of Class 1 Reactor Vessel Nozzles, Section XI Division 1,” with associated required conditions specified in RG 1.147. (Note: The NRC previously approved this Code Case with conditions; the staff revised these conditions for this guide.) 2/20/04 N-705 Evaluation Criteria for Temporary Acceptance of Degradation in Moderate Energy Class 2 or 3 Vessels and Tanks Section XI, Division 1 The ASME Code repair or