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:
e Inner Radius Inspections for Class 1 Pressurizer and Steam Generator Nozzles, Section XI, Division 1 In lieu of an ultrasonic examination, licensees may perform a VT-1 examination in accordance with the Code of Record for the ISI program using the allowable flaw length criteria of Section XI, Table IWB-3512-1, with limiting assumptions on the flaw aspect ratio. 4/8/02 N-638-7 Similar and Dissimilar Metal Welding Using Ambient Temperature Machine GTAW Temper Bead Technique, Section XI, Division 1 Demonstration of ultrasonic examination of the repaired volume is required using representative samples that contain construction-type flaws. 2/13E N-639 Alternative Calibration Block Material, Section XI, Division 1 Chemical ranges of the calibration block may vary from the materials specification if (1) it is within the chemical range of the component specification to be inspected and (2) the phase and grain shape are maintained in the same ranges produced by the thermal process required by the material specification. 8/20/02 N-647 Alternative to Augmented Examination Requirements of IWE-2500, Section XI, Division 1 A VT-1 examination is to be used in lieu of the “detailed visual examination.” (Note: RG 1.164, “Dedication of Commercial-Grade Items for Use in Nuclear Power Plants” (Ref. 8), which endorses, in part, EPRI Technical Report 3002002982, provides acceptable guidelines for sampling criteria.) 11/18/03 RG 1.147, Rev. 19, Page 16 CODE CASE NUMBER TABLE 2 CONDITIONALLY ACCEPTABLE SECTION XI CODE CASES CONDITION DATE OR SUPPLEMENT/ EDITION N-648-2 Alternative Requirements for Inner Radius Examination of Class 1 Reactor Vessel Nozzles, Section XI, Division 1 This Code Case shall not be used to eliminate the preservice or inservice volumetric examination of plants with a combined operating license under 10 CFR Part 52, or a plant that receives its operating license after October 22, 2015. 7/13E N-660 Risk-Informed Safety Classification for Use in Risk-Informed