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:
ion 1 Neither the ASME Code nor the Code Case have criteria for determining the rate or extent of degradation of the repair or the surrounding base metal. Reinspection requirements are not provided to verify structural integrity because the root cause may not be mitigated. Note: The NRC unconditionally approved Code Case N-561-3 in RG 1.147. 12/31/96 3/28/01 N-562 N-562-1 Alternative Requirements for Wall Thickness Restoration of Class 3 Moderate Energy Carbon Steel Piping, Section XI, Division 1 Neither the ASME Code nor the Code Case have criteria for determining the rate or extent of degradation of the repair or the surrounding base metal. Reinspection requirements are not provided to verify structural integrity because the root cause may not be mitigated. Note: The NRC conditionally approved Code Case N-562-2 in RG 1.147. 12/31/96 3/28/01 N-574 NDE Personnel Recertification Frequency, Section XI, Division 1 Based on data obtained by the NRC staff during its review of Section XI, Appendix VIII, “Performance Demonstration for Ultrasonic Examination Systems,” the NRC staff noted that proficiency decreases over time. The data do not support recertification examinations at a frequency of every 5 years. Annulled 7/14/06 DG-1408, Page 31 CODE CASE NUMBER TABLE 5 ANNULLED OR SUPERSEDED UNACCEPTABLE SECTION XI CODE CASES ANNULLMENT OR REVISION DATE N-577 Risk-Informed Requirements for Class 1, 2, and 3 Piping, Method A, Section XI, Division 1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-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