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:
eater than 0.1 atomic parts per million. 7/13E N-533-1 Alternative Requirements for VT-2 Visual Examination of Class 1, 2, and 3 Insulated Pressure-Retaining Bolted Connections, Section XI, Division 1 Prior to conducting the VT-2 examination of Class 2 and Class 3 components not required to operate during normal plant operation, a 10 minute holding time is required after attaining test pressure. Prior to conducting the VT-2 examination of Class 2 and Class 3 components required to operate during normal plant operation, no holding time is required, provided the system has been in operation for at least 4 hours for insulated components or 10 minutes for non-insulated components. 4/8/02 N-552-1 Alternative Methods—Qualification for Nozzle Inside Radius Section from the Outside Surface, Section XI, Division 1 To achieve consistency with the 10 CFR 50.55a rule change published September 22, 1999 (64 FR 51370), incorporating Appendix VIII, “Performance Demonstration for Ultrasonic Examination Systems,” to Section XI, add the following to the specimen requirements: “At least 50 percent of the flaws in the demonstration test set must be cracks and the maximum misorientation must be demonstrated with cracks. Flaws in nozzles with bore diameters equal to or less than 4 inches may be notches.” Add to detection criteria, “The number of false calls must not exceed three.” (Note: The above conditions are identical to those imposed on Code Case N- 552, in RG 1.147, Revision 16.) 6/22/12 RG 1.147, Rev. 19, Page 13 CODE CASE NUMBER TABLE 2 CONDITIONALLY ACCEPTABLE SECTION XI CODE CASES CONDITION DATE OR SUPPLEMENT/ EDITION N-557-1 In-Place Dry Annealing of a PWR Nuclear Reactor Vessel, Section XI, Division 1 The secondary stress allowable of 3Sm, shown in Figure 1 of the Code Case, must be applied to the entire primary plus secondary stress range during the anneal. 8/20/02 N-561-2 Alternative Requirements for Wall Thickness Restoration of Class 2 and High Energy Class