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:
risk contributors will not be created. 9/2/97 N-578 Risk-Informed Requirements for Class 1, 2, and 3 Piping, Method B, Section XI, Division 1 (1) The Code Case does not address inspection strategy for existing augmented and other inspection programs such as IGSCC, FAC, MIC, and pitting. (2) The Code Case does not provide system-level guidelines for change in risk evaluation to ensure that the risk from individual system failures will be kept small and that dominant risk contributors will not be created. 9/2/97 N-587 Alternative NDE Requirements for Repair/Replacement Activities, Section XI, Division 1 The NRC believes this Code Case is in conflict with the review process for approval of alternatives under 10 CFR 50.55a(z). The Code Case would permit a licensee and the authorized nuclear inspector to choose unspecified alternatives to regulatory requirements. Annulled 2/14/03 N-589 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. 4/19/02 N-590 Alternative to the Requirements of Subsection IWE, Requirements for Class MC and Metallic Liners of Class CC Components of Light-Water Cooled Plants, Section XI, Division 1 The provisions of the Code Case were incorporated into the 1998 Edition, which has been approved by the NRC. Therefore, the Code Case is no longer needed and was annulled by the ASME. Annulled 4/8/02 DG-1408, Page 32 CODE CASE NUMBER TABLE 5 ANNULLED OR