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:
25, 1993.) When a universal calibration block is used and some or all of the reference holes are larger than the reflector holes at comparable depths recommended by the 1980 Edition of the ASME Code, Section V, Article IV, a correction factor should be used to adjust the DAC level to compensate for the larger reflector holes. In addition, if the reactor pressure vessel was previously examined using a conventional block, a ratio between the DAC curves obtained from the two blocks should be noted (for reference) with the significant indication data. 2/19/92 N-509 Alternative Rules for the Selection and Examination of Class 1, 2, and 3 Integrally Welded Attachments, Section XI, Division 1 A minimum 10-percent sample of integrally welded attachments for each item in each Code Class per interval should be examined. 5/20/01 N-512-1 Assessment of Reactor Vessels with Low Upper Shelf Charpy Impact Energy Levels, Section XI, Division 1 The material properties and transient selection must follow the guidance in RG 1.161, “Evaluation of Reactor Pressure Vessels with Charpy Upper-Shelf Energy Less Than 50 ft-lb” (Ref. 9), or an equivalent NRC-approved method. 5/20/01 RG 1.147, Rev. 19, Page 27 CODE CASE NUMBER TABLE 4 ANNULLED CONDITIONALLY ACCEPTABLE SECTION XI, CODE CASES ANNULMENT DATE N-546 Alternative Requirements for Qualification of VT-2 Examination Personnel, Section XI, Division 1 This Code Case only applies to the performance of VT-2 examinations and may not be applied to other VT-2 functions such as verifying the adequacy of procedures and training VT-2 personnel. 9/18/04 N-568 Alternative Examination Requirements for Welded Attachments, Section XI, Division 1 This Code Case may only be used for examination of the accessible portions of lugs on piping where riser clamps (i.e., clamps on the vertical runs of pipes) obstruct access to welded surfaces. 2/14/03 N-599 Alternatives to Qualification of Nondestructive Examination Personnel for Inservice Inspection of