Document: NRC Regulatory Guide
Document ID: 7d480029-59df-44fe-9db8-c1c86566dac9
Document Type: regulatory_guide
Title: Operation and Maintenance Code Case Acceptability, ASME OM Code (Rev. 5)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22196A063.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.192
CFR Part: 
CFR Title: 

Content:
e, which are alternatives to the OM Code, must be supplemented in order to provide an acceptable level of quality and safety). c. Table 3, “OM Code Cases That Have Been Superseded by Revised OM Code Cases,” lists OM Code Cases that have been superseded through revision. d. Table 4, “Annulled OM Code Cases,” lists the OM Code Cases that have been annulled by ASME. DG-1407, Page 7 1. Acceptable OM Code Cases The OM Code Cases listed in Table 1 are acceptable to the NRC for application in applicant’s or licensee’s IST programs. The OM Code uses two approaches to list revisions of OM Code Cases. The first approach lists OM Code Cases according to edition or addenda (e.g., OMN-6, 2020 Edition). The second approach uses a numbering system (e.g., OMN-1, Revision 1) that states the latest revision number of a Code Case. Thus, the tables below show either the latest edition or addenda in which an OM Code Case was published or the latest revision number of an OM Code Case, in accordance with the requirement in 10 CFR 50.55a that licensees or applicants implement the most recent version of an OM Code Case. The edition and addenda are listed in addition to the revision number because the OM Code in some cases reaffirms OM Code Cases with minor changes. Listing both the revision number and edition or addenda ensures that the latest version of the OM Code Case is implemented. To assist users, new and revised OM Code Cases are shaded in grey to distinguish them from those approved in previous versions of this guide. Table 1. Acceptable OM Code Cases Code Case Number Table 1 Acceptable OM Code Cases OMN-6 (2022 Edition) Alternate Rules for Digital Instruments OMN-7 (2022 Edition) Alternative Requirements for Pump Testing OMN-8 (2022 Edition) Alternative Rules for Preservice and Inservice Testing of Power-Operated Valves That Are Used for System Control and Have a Safety Function per OM-10, ISTC-1.1, or ISTA-1100 OMN-13, Revisions 3 & 4 (2020 Edition) Performance-Based