Document: NRC Regulatory Guide
Document ID: a4944d20-ef6e-480b-a45d-14425bedd2e5
Document Type: regulatory_guide
Title: ASME Code Cases Not Approved for Use (Rev. 8)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22196A065.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.193
CFR Part: 
CFR Title: 

Content:
ibutors will not be created. 2/14/03 DG-1408, Page 16 CODE CASE NUMBER TABLE 2 UNACCEPTABLE SECTION XI CODE CASES SUMMARY DATE OR SUPPLEMENT/ EDITION N-589-1 Class 3 Nonmetallic Cured-in-Place Piping, Section XI, Division 1 (1) The installation process provides insufficient controls on wall thickness measurements. (2) There are no qualification requirements for installers and installation procedures such as those for welders and welding procedures. (3) Fracture toughness properties of the fiberglass are such that the cured-in-place piping (CIPP) could crack during a seismic event. (4) Equations 4 and 5 in the Code Case contain an “i” term (a stress intensification factor) that is derived from fatigue considerations. However, stress intensification factors have not been developed for fiberglass materials. 7/23/02 N-654 Acceptance Criteria for Flaws in Ferritic Steel Components 4 in. and Greater in Thickness, Section XI, Division 1 Licensees intending to apply the rules of this Code Case must obtain NRC approval of the specific application in accordance with 10 CFR 50.55a(z). 4/17/02 N-691-1 Application of Risk-Informed Insights to Increase the Inspection Interval for Pressurized Water Reactor Vessels, Section XI, Division 1 A response to the NRC staff’s request for additional information has not yet been received and therefore, insufficient information has been provided for the staff to make a determination relative to the acceptability of this Code Case. 6/19E N-722-2 Visual Examinations for PWR Pressure Retaining Welds in Class 1 Components Fabricated With Alloy 600/82/182 Materials, Section XI, Division 1 Code Case N-722 has been superseded by Revisions 1 and 2 to the Code Case. N-722-1 is conditionally approved directly under 10 CFR 50.55a and not through RG 1.147. The NRC has dispositioned Code Case N-722-2 as unacceptable. 9/8/11 N-729-9 Alternative Examination Requirements for PWR Reactor Vessel Upper Heads With Nozzles Having Pressure-Retaining