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:
ated when flow testing or examination methods (nonintrusive, or disassembly and inspection) are used. (2) The initial interval for tests and associated examinations may not exceed two fuel cycles or 3 years, whichever is longer; any extension of this interval may not exceed one fuel cycle per extension, with the maximum interval not to exceed 10 years. Trending and evaluation of existing data must be used to reduce or extend the time interval between tests. (3) If the Appendix II condition monitoring program is discontinued, the requirements of ISTC 4.5.1, “Exercising Test Frequency,” through ISTC 4.5.4, “Valve Obturator Movement” (1996 and 1997 Addenda), or ISTC 3510, 3520, 3540, and 5221 (1998 Edition through 2012 Edition), as applicable, must be implemented. Note 1: The conditions are identical to those imposed on OMN-4 in previous revisions to RG 1.192. Note 2: The conditions with respect to allowable methodologies for OMN-3 risk ranking specified for the use of OMN-1 also apply to OMN-4. OMN-9 (2022 Edition) Use of a Pump Curve for Testing (1) When a reference curve may have been affected by repair, replacement, or routine servicing of a pump, a new reference curve must be determined, or an existing reference curve must be reconfirmed, in accordance with Section 3 of this OM Code Case. (2) If it is necessary or desirable, for some reason other than that stated in Section 4 of this OM Code Case, to establish an additional reference curve or set of curves, these new curves must be determined in accordance with Section 3. Note 1: The conditions are identical to those imposed on OMN-9 in previous revisions to RG 1.192. OMN-12 (2022 Edition) Alternative Requirements for Inservice Testing Using Risk Insights for Pneumatically and Hydraulically Operated Valve Assemblies in Light-Water Reactor Power Plants (OM-Code 1998, Subsection ISTC) (1) Paragraph 4.2, “Inservice Test Requirements,” of OMN-12 specifies inservice test requirements for pneumatically and