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:
0L-03 which has subsequently been superseded by N690L-06. Thus, the Code Case is not up-to-date. In addition, questions regarding uncertainty remain with regard to the probabilistic treatment of loads and resistances. Thus, the LRFD method has not yet been approved by the NRC for use in the design of new reactor facilities. Note: The NRC unconditionally approved Code Case N-721-1 in RG 1.84. N-728 Use of ASTM B 932-04 Plate Material for Nonpressure Retaining Spent Fuel Containment Internals to 650°F (343°C), Section III, Division 3 The NRC has not yet endorsed Section III, Division 3. Therefore, it would not be appropriate to approve a Code Case that is an alternative to the provisions in Section III, Division 3. 10/11/05 Annulled 5/2/18 N-755 N-755-1 N-755-2 Use of Polyethylene (PE) Plastic Pipe, Section III, Division 1 and Division XI The staff has raised issues on materials, fusion qualification requirements, nondestructive examination (NDE), crack growth, and lack of data to support operating experience. Note: The NRC conditionally approved Code Case N-755-4 in RG 1.84. 3/22/07 7/15/11 8/13/13 N-792 Fatigue Evaluations, including Environmental Effects, Section III, Division 1 Code Case N-792 provides guidance on the use of Fen factors to address the effect of reactor water environment on cyclic damage in Class 1 components. Research results detailed in Welding Research Council Bulletin 487 and Argonne National Laboratory (ANL) report NUREG/CR- 6909 show that there is a possibility that reactor water environment may have an adverse effect on the fatigue damage for typical metals used in Class 1 components. Since Section III does not provide specific guidance in the area of environmental fatigue effects, this Code Case has been developed to provide a Code approved method. The Code Case uses the methodology and Fen equations suggested in NUREG/CR-6909. One major change in the Code Case compared to NUREG/CR-6909 is the deletion of the strain threshold. However,