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Case # OMN-1 (Revision 2), Alternative Rules for Preservice and Inservice Testing of Active Electric Motor Operated Valve Assemblies in Light-Water Reactor Power Plants (1054KB)
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Applicability Index revised 7/01/2022 as referenced by the NRC (755KB)
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Applicability Index revised 9/11/2023 (912KB)
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Case # OMN-3, Requirements for Safety Significance Categorization of Components Using Risk Insights for Inservice Testing of LWR Power Plants (1117KB)
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Case # OMN-4, Requirements for Risk Insights for Inservice Testing of Check Valves at LWR Power Plants (1013KB)
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Case # OMN-6, Alternate Rules for Digital Instruments (1080KB)
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Case # OMN-7, Alternative Requirements for Pump Testing (1022KB)
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Case # OMN-8, 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 (1066KB)
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Case # OMN-9, Use of a Pump Curve for Testing (1145KB)
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Case # OMN-10, Requirements for Safety Significance Categorization of Snubbers Using Risk Insights and Testing Strategies for Inservice Testing of LWR Power Plants (1147KB)
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Case # OMN-11, Risk-Informed Testing for Motor-Operated Valves (1093KB)
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Case # OMN-12, Alternate 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) (1141KB)
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Case # OMN-13 (Revision 4), Performance-Based Requirements for Extending Snubber Inservice Visual Examination Interval at LWR Power Plants (1133KB)
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Case # OMN-15 (Revision 3), Performance-Based Requirements for Extending the Snubber Operational Readiness Testing Interval at LWR Power Plants (1444KB)
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Case # OMN-16 (Revision 2), Use of a Pump Curve for Testing (1123KB)
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Case # OMN-18, Alternate Testing Requirements for Pumps Tested Quarterly Within ±20% of Design Flow (1074KB)
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Case # OMN-19, Alternative Upper Limit for the Comprehensive Pump Test (1081KB)
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Case # OMN-20, Inservice Test Frequency (1012KB)
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Case # OMN-21, Alternative Requirements for Adjusting Hydraulic Parameters to Specified Reference Points (1071KB)
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Case # OMN-27, Alternative Requirements for Testing Category A Valves (Non-PIV/CIV) (646KB)
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Case # OMN-28, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation. (613KB)
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Case # OMN-29, Pump Condition Monitoring Program (2883KB)
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Case # OMN-30, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 (593KB)
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Case # OMN-15 (Revision 4), Performance-Based Requirements for Extending the Snubber Operational Readiness Testing Interval at LWR Power Plants (1388KB)
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Case # OMN-31 Alternative to Allow Extension of ISTA-3120 Inservice Examination and Test Intervals From 10 Years to 12 Years (123KB)
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Case # OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests (173KB)
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Case # OMN-17 (Revision 1), Alternative Rules for Testing ASME Class 1 Pressure Relief/Safety Valves (124KB)
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Case # OMN-22, Smooth Running Pumps (100KB)
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Case # OMN-23, Alternative Rules for Testing Pressure Isolation Valves (690KB)
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Case # OMN-24, Alternative Requirements for Testing ASME Class 2 and 3 Pressure Relief Valves (For Relief Valves in a Group of One) (104KB)
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Case # OMN-26, Alternate Risk-Informed and Margin Based Rules for Inservice Testing of Motor Operated Valves (136KB)
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Case # OMN-25, Alternative Requirements for Testing Appendix I Pressure Relief Valves (71KB)