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:
Outside Surface, Section XI, Division 1 (1) Instead of Paragraph 1(c)(1)(–c)(–2), licensees shall use a search unit with a center frequency of 500 kHz with a tolerance of plus or minus 20 percent for piping greater than 1.6 in (41 mm) thick. (2) Instead of Paragraph 1(c)(1)(–d), the search unit must produce angles, including those at, but not limited to, 30 to 55 degrees with a maximum increment of 5 degrees. 11/10E RG 1.147, Rev. 19, Page 20 CODE CASE NUMBER TABLE 2 CONDITIONALLY ACCEPTABLE SECTION XI CODE CASES CONDITION DATE OR SUPPLEMENT/ EDITION N-829 Austenitic Stainless Steel Cladding and Nickel Base Cladding Using Ambient Temperature Machine GTAW Temper Bead Technique Section XI, Division 1 The provisions of Paragraph 3(e)(2) or 3(e)(3) may only be used when it is impractical to use the interpass temperature measurement methods described in Paragraph 3(e)(1), such as in situations where the weldment area is inaccessible (e.g., internal bore welding) or when there are extenuating radiological conditions. 0/13E N-830 Direct Use of Master Fracture Toughness Curve for Pressure Retaining Materials of Class 1 Vessels, Section XI Use of Code Case N-830, Paragraph (f), which provides an alternative to limiting the lower shelf of the 95-percent lower tolerance bound Master Curve toughness, KJC-lower 95%, to a value consistent with the current KIC curve, is prohibited. 7/13E N-831 Ultrasonic Examination in Lieu of Radiography for Welds in Ferritic Pipe, Section XI, Division 1 Code Case N-831 is prohibited for use in new reactor construction. 0/17E N-838 Flaw Tolerance Evaluation of Cast Austenitic Stainless Steel Piping Section XI, Division 1 Code Case N-838 shall not be used to evaluate flaws in cast austenitic stainless steel piping where the delta ferrite content exceeds 25 percent. 2/15E N-843 Alternative Pressure Testing Requirements Following Repairs or Replacements for Class 1 Piping between the First and Second Inspection Isolation Valves, Section XI,