PRA Reference Library

NRC / INL industry-average component reliability, common-cause failure, and LOOP recovery data.

Industry-average reference parameters reproduced from the U.S. NRC / Idaho National Laboratory SPAR program (NUREG/CR-6928 series and the CCF and LOOP studies), nrcoe.inl.gov. These are the generic basic-event and recovery values PRA models start from before plant-specific updating. ← Back to the POET tool

Component Reliability 307 parameters · SPAR 2020

GroupComponentCodeDescriptionMean5th95thUnitsFailures
2021-11-01 18:54:55.940000 Parameter Estimate 2020 V1
Valves Air-Operated Valve (AOV) AOV-FTO Air-Operated Valve Fails To Open 3.04e-4 2.37e-4 3.78e-4 /demand 50
Valves Air-Operated Valve (AOV) AOV-FTC Air-Operated Valve Fails To Close 1.89e-4 2.30e-6 6.64e-4 /demand 27
Valves Air-Operated Valve (AOV) AOV-FTOC Air-Operated Valve Fails To Open/Close 5.58e-4 1.73e-5 0.001780 /demand 83
Valves Air-Operated Valve (AOV) AOV-FC Air-Operated Valve Fails To Control 1.75e-7 1.50e-8 4.86e-7 /hour 167
Valves Air-Operated Valve (AOV) AOV-SOP Air-Operated Valve Spurious Operation 5.83e-8 1.99e-9 1.85e-7 /hour 61
Valves Air-Operated Valve (AOV) AOV-ILS Air-Operated Valve Internal Leakage (Small) 3.20e-8 2.37e-8 4.13e-8 /hour 35
Valves Air-Operated Valve (AOV) AOV-ILL Air-Operated Valve Internal Leakage (Rupture) 6.40e-10 6.85e-14 2.93e-9 /hour (note c)
Valves Air-Operated Valve (AOV) AOV-ELS Air-Operated Valve External Leakage (Small) 3.43e-8 2.67e-10 1.25e-7 /hour 35
Valves Air-Operated Valve (AOV) AOV-ELL Air-Operated Valve External Leakage (Rupture) 2.40e-9 2.57e-13 1.10e-8 /hour (note c)
Valves Air-Operated Valve (AOV) AOV-SOP-CCW Component Cooling Water AOV Spurious Operation 7.26e-8 4.00e-8 1.13e-7 /hour 10
Valves Air-Operated Valve (AOV) AOV-SOP-IAS Instrument Air System AOV Spurious Operation 8.04e-8 3.16e-10 3.09e-7 /hour 0
Valves Motor-Operated Valve (MOV) MOV-FTO Motor-Operated Valve Fails To Open 3.43e-4 7.80e-5 7.62e-4 /demand 190
Valves Motor-Operated Valve (MOV) MOV-FTC Motor-Operated Valve Fails To Close 2.28e-4 1.09e-5 6.90e-4 /demand 123
Valves Motor-Operated Valve (MOV) MOV-FTOC Motor-Operated Valve Fails To Open/Close 6.40e-4 1.42e-4 0.001430 /demand 346
Valves Motor-Operated Valve (MOV) MOV-FC Motor-Operated Feed Control Valve Fails To Control 3.47e-8 9.42e-10 1.13e-7 /hour 59
Valves Motor-Operated Valve (MOV) MOV-SOP Motor-Operated Valve Spurious Operation 2.54e-8 1.93e-8 3.23e-8 /hour 41
Valves Motor-Operated Valve (MOV) MOV-ILS Motor-Operated Valve Internal Leakage (Small) 3.61e-8 7.97e-11 1.44e-7 /hour 55
Valves Motor-Operated Valve (MOV) MOV-ILL Motor-Operated Valve Internal Leakage (Rupture) 7.22e-10 7.73e-14 3.30e-9 /hour (note c)
Valves Motor-Operated Valve (MOV) MOV-ELS Motor-Operated Valve External Leakage (Small) 1.88e-8 4.85e-11 7.43e-8 /hour 29
Valves Motor-Operated Valve (MOV) MOV-ELL Motor-Operated Valve External Leakage (Rupture) 1.32e-9 1.41e-13 6.02e-9 /hour (note c)
Valves Motor-Operated Valve (MOV) MOV-FTO-BFV Butterfly Valve Fails To Open 2.74e-4 1.90e-4 3.71e-4 /demand 24
Valves Motor-Operated Valve (MOV) MOV-FTC-BFV Butterfly Valve Fails To Close 2.89e-4 2.52e-5 7.97e-4 /demand 24
Valves Motor-Operated Valve (MOV) MOV-FTOC-BFV Butterfly Valve Fails To Open/Close 7.69e-4 7.34e-6 0.002760 /demand 54
Valves Motor-Operated Valve (MOV) MOV-SOP-CCW Component Cooling Water MOV Spurious Operation 2.45e-8 9.04e-9 4.60e-8 /hour 4
Valves Motor-Operated Valve (MOV) MOV-SOP-SWS Standby Service Water Motor-Operated Valve Spurious Operation 7.72e-9 3.04e-11 2.97e-8 /hour 0
Valves Motor-Operated Valve (MOV) MOV-BFV-SOP-CCW Component Cooling Water Butterfly Valve Spurious Operation 2.89e-8 6.61e-9 6.39e-8 /hour 2
Valves Hydraulic-Operated Valve (HOV) HOV-FTOC Hydraulic-Operated Valve Fails To Open 0.001230 2.23e-6 0.004970 /demand 17
Valves Hydraulic-Operated Valve (HOV) HOV-FC Hydraulic-Operated Valve Fails To Control 2.82e-7 1.90e-7 3.89e-7 /hour 21
Valves Hydraulic-Operated Valve (HOV) HOV-SOP Hydraulic-Operated Valve Spurious Operation 1.23e-7 6.27e-10 4.64e-7 /hour 10
Valves Hydraulic-Operated Valve (HOV) HOV-ILS Hydraulic-Operated Valve Internal Leakage (Small) 3.28e-8 7.52e-9 7.26e-8 /hour 2
Valves Hydraulic-Operated Valve (HOV) HOV-ILL Hydraulic-Operated Valve Internal Leakage (Rupture) 6.56e-10 7.02e-14 3.00e-9 /hour (note c)
Valves Hydraulic-Operated Valve (HOV) HOV-ELS Hydraulic-Operated Valve External Leakage (Small) 9.66e-8 2.08e-10 3.85e-7 /hour 7
Valves Hydraulic-Operated Valve (HOV) HOV-ELL Hydraulic-Operated Valve External Leakage (Rupture) 6.76e-9 7.24e-13 3.09e-8 /hour (note c)
Valves Solenoid-Operated Valve (SOV) SOV-FTOC Solenoid-Operated Valve Fails To Open 4.83e-4 2.89e-4 7.18e-4 /demand 13
Valves Solenoid-Operated Valve (SOV) SOV-FC Solenoid-Operated Valve Fails To Control 1.52e-7 1.52e-9 5.44e-7 /hour 15
Valves Solenoid-Operated Valve (SOV) SOV-SOP Solenoid-Operated Valve Spurious Operation 8.21e-8 4.36e-8 1.30e-7 /hour 9
Valves Solenoid-Operated Valve (SOV) SOV-ILS Solenoid-Operated Valve Internal Leakage (Small) 7.34e-8 3.74e-8 1.19e-7 /hour 8
Valves Solenoid-Operated Valve (SOV) SOV-ILL Solenoid-Operated Valve Internal Leakage (Rupture) 1.47e-9 1.57e-13 6.72e-9 /hour (note c)
Valves Solenoid-Operated Valve (SOV) SOV-ELS Solenoid-Operated Valve External Leakage (Small) 2.16e-8 4.94e-9 4.77e-8 /hour 2
Valves Solenoid-Operated Valve (SOV) SOV-ELL Solenoid-Operated Valve External Leakage (Rupture) 1.51e-9 1.62e-13 6.92e-9 /hour (note c)
Valves Explosive-Operated Valve (EOV) EOV-FTO Explosive-Operated Valve Fails To Open 0.004620 2.45e-4 0.013800 /demand 3
Valves Vacuum Breaker Valve (VBV) VBV-FTO Vacuum Breaker Valve Fails To Open 6.46e-5 7.58e-6 1.68e-4 /demand 1
Valves Vacuum Breaker Valve (VBV) VBV-FTC Vacuum Breaker Valve Fails To Close 6.46e-5 7.58e-6 1.68e-4 /demand 1
Valves Vacuum Breaker Valve (VBV) VBV-FTOC Vacuum Breaker Valve Fails To Open/Close 1.08e-4 2.47e-5 2.39e-4 /demand 2
Valves Vacuum Breaker Valve (VBV) VBV-SOP Vacuum Breaker Valve Spurious Operation 1.14e-8 4.50e-11 4.40e-8 /hour 0
Valves Vacuum Breaker Valve (VBV) VBV-ILS Vacuum Breaker Valve Internal Leakage (Small) 5.72e-8 1.31e-8 1.27e-7 /hour 2
Valves Vacuum Breaker Valve (VBV) VBV-ILL Vacuum Breaker Valve Internal Leakage (Rupture) 1.14e-9 1.22e-13 5.23e-9 /hour (note c)
Valves Turbine Bypass Valve (TBV) TBV-FTO Turbine Bypass Valve Fails To Open 6.33e-4 7.42e-5 0.001650 /demand 1
Valves Turbine Bypass Valve (TBV) TBV-FTC Turbine Bypass Valve Fails To Close 2.11e-4 8.30e-7 8.10e-4 /demand 0
Valves Turbine Bypass Valve (TBV) TBV-FTOC Turbine Bypass Valve Fails To Open/Close 6.33e-4 7.42e-5 0.001650 /demand 1
Valves Turbine Bypass Valve (TBV) TBV-FC Turbine Bypass Valve Fails To Control 3.57e-7 1.29e-9 1.38e-6 /hour 6
Valves Main Steam Isolation Valve (MSV) MSV-FTOC Main Steam Isolation Valve Fails To Open/Close 7.61e-4 5.27e-4 0.001030 /demand 24
Valves Main Steam Isolation Valve (MSV) MSV-SOP Main Steam Isolation Valve Spurious Operation 2.34e-7 9.30e-10 8.99e-7 /hour 16
Valves Main Steam Isolation Valve (MSV) MSV-ILS Main Steam Isolation Valve Internal Leakage (Small) 3.57e-7 2.45e-7 4.86e-7 /hour 23
Valves Main Steam Isolation Valve (MSV) MSV-ILL Main Steam Isolation Valve Internal Leakage (Rupture) 7.14e-9 7.64e-13 3.27e-8 /hour (note c)
Valves Main Steam Isolation Valve (MSV) MSV-ELS Main Steam Isolation Valve External Leakage (Small) 2.28e-8 2.67e-9 5.94e-8 /hour 1
Valves Main Steam Isolation Valve (MSV) MSV-ELL Main Steam Isolation Valve External Leakage (Rupture) 1.60e-9 1.71e-13 7.30e-9 /hour (note c)
Valves Check Valve (CKV) CKV-FTO Check Valve Fails To Open 1.12e-5 4.39e-8 4.29e-5 /demand 0
Valves Check Valve (CKV) CKV-FTC Check Valve Fails To Close 1.23e-4 5.11e-5 2.20e-4 /demand 5
Valves Check Valve (CKV) CKV-SOP Check Valve Spurious Operation 6.20e-10 2.44e-12 2.38e-9 /hour 0
Valves Check Valve (CKV) CKV-ILS Check Valve Internal Leakage (Small) 7.25e-8 5.76e-8 8.88e-8 /hour 58
Valves Check Valve (CKV) CKV-ILL Check Valve Internal Leakage (Rupture) 1.45e-9 1.55e-13 6.63e-9 /hour (note c)
Valves Check Valve (CKV) CKV-ELS Check Valve External Leakage (Small) 4.34e-9 1.34e-9 8.72e-9 /hour 3
Valves Check Valve (CKV) CKV-ELL Check Valve External Leakage (Rupture) 3.04e-10 3.25e-14 1.39e-9 /hour (note c)
Valves Manual Valve (XVM) XVM-FTOC Manual Valve Fails To Open 5.22e-4 6.13e-5 0.001360 /demand 1
Valves Manual Valve (XVM) XVM-SOP Manual Valve Spurious Operation 1.88e-8 4.31e-9 4.16e-8 /hour 2
Valves Manual Valve (XVM) XVM-ILS Manual Valve Internal Leakage (Small) 2.64e-8 8.15e-9 5.29e-8 /hour 3
Valves Manual Valve (XVM) XVM-ILL Manual Valve Internal Leakage (Rupture) 5.28e-10 5.65e-14 2.42e-9 /hour (note c)
Valves Manual Valve (XVM) XVM-ELS Manual Valve External Leakage (Small) 8.67e-8 4.92e-8 1.32e-7 /hour 11
Valves Manual Valve (XVM) XVM-ELL Manual Valve External Leakage (Rupture) 6.07e-9 6.50e-13 2.78e-8 /hour (note c)
Valves Manual Valve (XVM) XVM-SOP-SWS Standby Service Water Manual Valve Spuriously Transfers 2.77e-8 1.09e-10 1.06e-7 /hour 0
Valves Flow Control Valve (FCV) FCV-FTOC Flow Control Valve Fails To Open/Close 4.41e-5 1.74e-7 1.70e-4 /demand 0
Valves Flow Control Valve (FCV) FCV-FC Flow Control Valve Fails To Control 1.15e-7 5.89e-8 1.87e-7 /hour 8
Valves Flow Control Valve (FCV) FCV-SOP Flow Control Valve Spurious Operation 3.40e-8 7.78e-9 7.52e-8 /hour 2
Valves Flow Control Valve (FCV) FRV-FTOP Feedwater Regulating Valve Fails To Operate 1.88e-6 2.71e-8 6.52e-6 /hour 49
Pumps Motor-Driven Pump (MDP) MDP-FTS-NS Motor-Driven Pump Fails To Start, Normally Standby 5.88e-4 1.09e-4 0.001380 /demand 227
Pumps Motor-Driven Pump (MDP) MDP-FTR<1H Motor-Driven Pump FTR<1H 9.13e-5 7.34e-7 3.33e-4 /hour 31
Pumps Motor-Driven Pump (MDP) MDP-FTR>1H Motor-Driven Pump FTR>1H 8.12e-6 3.58e-8 3.10e-5 /hour 92
Pumps Motor-Driven Pump (MDP) MDP-ELS Motor-Driven Pump External Leakage (Small) 1.98e-7 3.16e-9 6.80e-7 /hour 59
Pumps Motor-Driven Pump (MDP) MDP-ELL Motor-Driven Pump External Leakage (Rupture) 1.39e-8 1.48e-12 6.34e-8 /hour (note c)
Pumps Motor-Driven Pump (MDP) MDP-FTS-NR Motor-Driven Pump Fails To Start, Normally Running 7.86e-4 4.86e-5 0.002300 /demand 89
Pumps Motor-Driven Pump (MDP) MDP-FTR-NR Motor-Driven Pump Fails To Run, Normally Running 2.26e-6 3.94e-7 5.38e-6 /hour 129
Pumps Motor-Driven Pump (MDP) MDP-FTS-CCW Component Cooling Water Motor-Driven Pump Fails To Start 4.57e-4 1.23e-5 0.001490 /hour 31
Pumps Motor-Driven Pump (MDP) MDP-FTR-CCW Component Cooling Water Motor-Driven Pump Fails To Run 1.77e-6 2.86e-7 4.33e-6 /hour 31
Pumps Motor-Driven Pump (MDP) MDP-FTS-SWS Service Water Motor-Driven Pump Fails To Start 7.43e-4 2.43e-5 0.002360 /demand 132
Pumps Motor-Driven Pump (MDP) MDP-FTR-SWS Service Water Motor-Driven Pump Fails To Run 4.20e-6 3.09e-7 1.19e-5 /hour 100
Pumps Motor-Driven Pump (MDP) MDP-FTR-CWS Circulating Water Motor-Driven Pump Fails To Run 4.86e-6 1.81e-6 9.09e-6 /hour 15
Pumps Turbine-Driven Pump (TDP) TDP-FTS-NS Turbine-Driven Pump Fails To Start (Pooled Systems), Normally Standby 0.005320 4.59e-4 0.014700 /demand 105
Pumps Turbine-Driven Pump (TDP) TDP-FTR<1H Turbine-Driven Pump Fails To Run (Pooled Systems), Early Term 0.002560 5.17e-6 0.010300 /hour 34
Pumps Turbine-Driven Pump (TDP) TDP-FTR>1H Turbine-Driven Pump Fails To Run (Pooled Systems), Late Term 0.006350 1.23e-5 0.025500 /hour 17
Pumps Turbine-Driven Pump (TDP) TDP-ELS Turbine-Driven Pump External Leakage (Small) 4.13e-7 7.42e-8 9.75e-7 /hour 10
Pumps Turbine-Driven Pump (TDP) TDP-ELL Turbine Bypass Valve External Leakage (Rupture) 2.89e-8 3.09e-12 1.32e-7 /hour (note c)
Pumps Turbine-Driven Pump (TDP) TDP-FTS-NS-AFW Auxiliary Feedwater Turbine-Driven Pump Fails To Start, Normally Standby 0.003790 1.17e-4 0.012100 /demand 52
Pumps Turbine-Driven Pump (TDP) TDP-FTR<1H-AFW Auxiliary Feedwater Turbine-Driven Pump FTR<1H 0.001730 0.001120 0.002440 /hour 18
Pumps Turbine-Driven Pump (TDP) TDP-FTR>1H-AFW Auxiliary Feedwater Turbine-Driven Pump FTR>1H 0.002580 0.001310 0.004180 /hour 8
Pumps Turbine-Driven Pump (TDP) TDP-FTS-NS-HCI-RCI HCI-RCI Turbine-Driven Pump Fails To Start, Normally Standby 0.006680 6.02e-4 0.018200 /demand 25
Pumps Turbine-Driven Pump (TDP) TDP-FTR<1H-HCI-RCI HCI Turbine-Driven Pump FTR<1H 0.003350 6.73e-4 0.007680 /hour 16
Pumps Turbine-Driven Pump (TDP) TDP-FTR>1H-HCI-RCI HCI-RCI Turbine-Driven Pump FTR>1H 0.008200 0.004360 0.013000 /hour 9
Pumps Turbine-Driven Pump (TDP) TDP-FTS-NR-MFW Main Feedwater Turbine-Driven Pump Fails To Start, Normally Running 0.004600 5.45e-5 0.016200 /demand 5
Pumps Turbine-Driven Pump (TDP) TDP-FTR-NR-MFW Main Feedwater Turbine-Driven Pump Fails To Run, Normally Running 8.45e-6 2.53e-7 2.71e-5 /hour 39
Pumps Engine-Driven Pump (EDP) EDP-FTS-NS Engine-Driven Pump Fails To Start, Normally Standby 7.60e-4 4.53e-4 0.001130 /demand 13
Pumps Engine-Driven Pump (EDP) EDP-FTR<1H Engine-Driven Pump FTR<1H, Normally Standby 6.57e-4 2.98e-4 0.001130 /hour 6
Pumps Engine-Driven Pump (EDP) EDP-FTR>1H Engine-Driven Pump FTR>1H, Normally Standby 0.003260 0.002030 0.004740 /hour 15
Pumps Engine-Driven Pump (EDP) EDP-ELS Engine-Driven Pump External Leakage (Small) 8.45e-7 3.83e-7 1.45e-6 /hour 6
Pumps Engine-Driven Pump (EDP) EDP-ELL Engine-Driven Pump External Leakage (Rupture) 5.92e-8 6.33e-12 2.71e-7 /hour (note c)
Pumps Engine-Driven Pump (EDP) EDP-FTS-AFW Auxiliary Feedwater Engine-driven pump Fails To Start 0.001290 1.52e-4 0.003360 /demand 1
Pumps Engine-Driven Pump (EDP) EDP-FTR<1H-AFW Auxiliary Feedwater Engine-driven pump Fails To Run <1H 0.003290 7.55e-4 0.007290 /hour 2
Pumps Engine-Driven Pump (EDP) EDP-FTR>1H-AFW Auxiliary Feedwater Engine-driven pump Fails To Run >1H 0.010700 0.002450 0.023700 /hour 2
Pumps Positive Displacement Pump (PDP) PDP-FTS-NR Positive Displacement Pump Fails To Start, Normally Running 0.002470 7.46e-5 0.007920 /demand 53
Pumps Positive Displacement Pump (PDP) PDP-FTR-NR Positive Displacement Pump Fails To Run, Normally Running 1.91e-5 1.81e-6 5.17e-5 /hour 40
Pumps Positive Displacement Pump (PDP) PDP-FTS-NS Positive Displacement Pump Fails To Start, Normally Standby 0.001160 6.40e-4 0.001800 /demand 10
Pumps Positive Displacement Pump (PDP) PDP-FTR<1H Positive Displacement Pump FTR<1H 3.71e-4 4.34e-5 9.65e-4 /hour 1
Pumps Positive Displacement Pump (PDP) PDP-FTR>1H Positive Displacement Pump FTR>1H 3.32e-4 1.31e-6 0.001280 /hour 0
Pumps Positive Displacement Pump (PDP) PDP-ELS Positive Displacement Pump External Leakage (Small) 7.31e-7 4.55e-7 1.06e-6 /hour 15
Pumps Positive Displacement Pump (PDP) PDP-ELL Positive Displacement Pump External Leakage (Rupture) 5.12e-8 5.48e-12 2.34e-7 /hour (note c)
Pumps Pump Volute (PMP) PMP-Volute Pump Volute Fails To Run (Driver Independent Centrifugal Pumps) 1.24e-4 7.84e-5 1.78e-4 /hour 16
Generators Emergency Diesel Generator (EDG) EDG-FTS Diesel Generator Fails To Start, Normally Standby 0.002220 0.001530 0.003020 /demand 136
Generators Emergency Diesel Generator (EDG) EDG-FTLR Diesel Generator Fails To Load And Run, Early 0.003310 0.001050 0.006600 /hour 172
Generators Emergency Diesel Generator (EDG) EDG-FTR Diesel Generator Fails To Run, Late Term 0.001180 3.90e-4 0.002310 /hour 155
Generators Hydro Turbine Generator (HTG) HTG-FTS Hydro Turbine Generator Fails To Start 0.001020 4.63e-4 0.001760 /demand 6
Generators Hydro Turbine Generator (HTG) HTG-FTLR Hydro Turbine Generator Fails To Load And Run, Early 5.46e-4 1.25e-4 0.001210 /hour 2
Generators Hydro Turbine Generator (HTG) HTG-FTR Hydro Turbine Generator Fails To Run, Late Term 1.08e-4 1.27e-5 2.81e-4 /hour 1
Generators Combustion Turbine Generator (CTG) CTG-FTS Combustion Turbine Generator Fails To Start, Normally Standby 0.070300 0.005810 0.190000 /demand 21
Generators Combustion Turbine Generator (CTG) CTG-FTLR Combustion Turbine Generator Fails To Load And Run, Early Term 0.006940 0.001590 0.015400 /demand 2
Generators Combustion Turbine Generator (CTG) CTG-FTR Combustion Turbine Generator Fails To Run, Late Term 0.004690 0.001730 0.008820 /hour 4
Generators High-Pressure Core Spray Generator (HPCS) EDG-FTS-HCS High-Pressure Core Spray Generator Fails To Start 0.002130 7.87e-4 0.004000 /demand 4
Generators High-Pressure Core Spray Generator (HPCS) EDG-FTR-HCS High-Pressure Core Spray Generator Fails To Run 8.34e-4 2.58e-4 0.001670 /hour 3
Generators Station Blackout Generator (SBO) EDG-FTS-SBO SBO Generator Fails To Start 0.029400 0.001460 0.087500 /demand 14
Generators Station Blackout Generator (SBO) EDG-FTR-SBO SBO Generator Fails To Run 0.001130 2.60e-4 0.002520 /hour 2
Relief Valves Safety Relief Valve (SRV) SRV-FTO Safety relief valve fails To open 0.002110 0.001020 0.003520 /demand 7
Relief Valves Safety Relief Valve (SRV) SRV-FTC BWR ADS/SRV Fails To Reclose 1.41e-4 5.54e-7 5.41e-4 /demand 0
Relief Valves Safety Relief Valve (SRV) SRV-FC Safety Relief Valve (BWR Only) Fails To Control 8.20e-9 3.22e-11 3.15e-8 /hour 0
Relief Valves Safety Relief Valve (SRV) SRV-SOP Safety Relief Valve Spurious Operation 7.38e-8 2.73e-8 1.39e-7 /hour 4
Relief Valves Safety Relief Valve (SRV) SRV-ILS Safety Relief Valve (BWR Only) Internal Leakage (Small) 3.85e-7 2.64e-7 5.25e-7 /hour 23
Relief Valves Safety Relief Valve (SRV) SRV-ILL Safety Relief Valve (BWR Only) Internal Leakage (Rupture) 7.70e-9 8.24e-13 3.52e-8 /hour (note c)
Relief Valves Safety Relief Valve (SRV) SRV-ELS Safety Relief Valve (BWR Only) External Leakage (Small) 8.20e-9 3.22e-11 3.15e-8 /hour 0
Relief Valves Safety Relief Valve (SRV) SRV-ELL Safety Relief Valve (BWR Only) External Leakage (Rupture) 5.74e-10 6.14e-14 2.63e-9 /hour (note c)
Relief Valves Safety Valve (SVV) SVV-SOP Code Safety Valve Spurious Operation 8.74e-9 1.02e-9 2.27e-8 /hour 1
Relief Valves Safety Valve (SVV) SVV-ILS Code Safety Valve Internal Leakage (Small) 3.20e-8 1.33e-8 5.72e-8 /hour 5
Relief Valves Safety Valve (SVV) SVV-ILL Code Safety Valve Internal Leakage (Rupture) 6.40e-10 6.85e-14 2.93e-9 /hour (note c)
Relief Valves Safety Valve (SVV) SVV-ELS Code Safety Valve External Leakage (Small) 8.74e-9 1.02e-9 2.27e-8 /hour 1
Relief Valves Safety Valve (SVV) SVV-ELL Code Safety Valve External Leakage (Rupture) 6.12e-10 6.55e-14 2.80e-9 /hour (note c)
Relief Valves Safety Valve (SVV) SVV-FTO-PWR-MSS Safety Valve Fails To Open+D174 PWRs) 6.70e-4 2.61e-6 0.002580 /demand 0
Relief Valves Safety Valve (SVV) SVV-FTC-PWR-MSS Safety Valve Fails To Close (Main Steam System, PWRs) 0.006030 0.002230 0.011300 /demand 4
Relief Valves Safety Valve (SVV) SVV-SOP-PWR-MSS Safety Valve Spurious Operation (Main Steam System, PWRs) 3.57e-9 1.40e-11 1.37e-8 /hour 0
Relief Valves Safety Valve (SVV) SVV-FTO-PWR-RCS Safety Valve Fails To Open (Reactor Coolant System, PWRs) 6.63e-4 2.58e-6 0.002550 /demand 0
Relief Valves Safety Valve (SVV) SVV-FTC-PWR-RCS Safety Valve Fails To Close (Reactor Coolant System, PWRs) 0.041300 0.009650 0.090100 /demand 2
Relief Valves Safety Valve (SVV) SVV-SOP-PWR-RCS Safety Valve Spurious Operation (Reactor Coolant System, PWRs) 6.28e-8 7.36e-9 1.63e-7 /hour 1
Relief Valves Power-Operated Relief Valve (PORV) PORV-FTO-RCS Power-Operated Relief Valve Fails To Open (Reactor Coolant System, PWRs) 0.011900 0.004420 0.022300 /demand 4
Relief Valves Power-Operated Relief Valve (PORV) PORV-FTC-RCS Power-Operated Relief Valve Fails To Close (Reactor Coolant System, PWRs) 0.003970 1.47e-5 0.015300 /demand 1
Relief Valves Power-Operated Relief Valve (PORV) PORV-FTO-MSS Power-Operated Relief Valve Fails To Open (Main Steam System, PWRs) 0.016100 0.011300 0.021700 /demand 25
Relief Valves Power-Operated Relief Valve (PORV) PORV-FTC-MSS Power-Operated Relief Fails To Close (Main Steam System, PWRs) 0.004350 2.54e-4 0.012800 /demand 7
Relief Valves Power-Operated Relief Valve (PORV) PORV-FC-MSS Power-Operated Relief Fails To Control (Cooldown) (Main Steam System, PWRs) 0.026900 0.013100 0.044500 /demand 7
Relief Valves Power-Operated Relief Valve (PORV) PORV-SOP Power Operated Relief Spurious Operation 2.36e-7 1.41e-7 3.51e-7 /hour 13
Relief Valves Power-Operated Relief Valve (PORV) PORV-ILS Power-Operated Relief Valve Internal Leakage (Small) 6.12e-8 1.89e-8 1.23e-7 /hour 3
Relief Valves Power-Operated Relief Valve (PORV) PORV-ILL Power-Operated Relief Valve Internal Leakage (Rupture) 1.22e-9 1.31e-13 5.60e-9 /hour (note c)
Relief Valves Power-Operated Relief Valve (PORV) PORV-ELS Power-Operated Relief Valve External Leakage (Small) 8.74e-9 3.44e-11 3.36e-8 /hour 0
Relief Valves Power-Operated Relief Valve (PORV) PORV-ELL Power-Operated Relief Valve External Leakage (Rupture) 6.12e-10 6.55e-14 2.80e-9 /hour (note c)
Relief Valves Power-Operated Relief Valve (PORV) PORV-LOOP Power-Operated Relief Valves Open During LOOP (Reactor Coolant System, PWRs) 0.092300 /demand --
Relief Valves Power-Operated Relief Valve (PORV) PORV-Transient Power-Operated Relief Valves Open During Transient (Reactor Coolant System, PWRs) 0.022800 /demand --
Relief Valves Low-Capacity Relief Valve (RVL) RVL-FTO Low Capacity Relief Valve Fails To Open 0.007590 3.02e-5 0.029100 /demand 0
Relief Valves Low-Capacity Relief Valve (RVL) RVL-FTC Low Capacity Relief Valve Fails To Close 0.007590 3.02e-5 0.029100 /demand 0
Relief Valves Low-Capacity Relief Valve (RVL) RVL-SOP Low Capacity Relief Valve Spurious Operation 5.46e-8 2.14e-10 2.09e-7 /hour 0
Relief Valves Low-Capacity Relief Valve (RVL) RVL-ILS Low Capacity Relief Valve Internal Leakage (Small) 3.82e-7 1.18e-7 7.67e-7 /hour 3
Relief Valves Low-Capacity Relief Valve (RVL) RVL-ILL Low Capacity Relief Valve Internal Leakage (Rupture) 7.64e-9 8.18e-13 3.49e-8 /hour (note c)
Relief Valves Low-Capacity Relief Valve (RVL) RVL-ELS Low Capacity Relief Valve External Leakage (Small) 3.82e-7 1.18e-7 7.67e-7 /hour 3
Relief Valves Low-Capacity Relief Valve (RVL) RVL-ELL Low Capacity Relief Valve External Leakage (Rupture) 2.67e-8 2.86e-12 1.22e-7 /hour (note c)
Electrical Equipment Battery Charger (BCH) BCH-FTOP Battery Charger Fails To Operate 1.76e-6 1.09e-7 5.15e-6 /hour 161
Electrical Equipment Battery (BAT) BAT-FTOP Battery Fails To Operate 4.05e-7 4.79e-9 1.42e-6 /hour 21
Electrical Equipment Automatic Bus Transfer Switch (ABT) ABT-FF Automatic Power Transfer Switch Fails To Transfer 0.001330 4.93e-4 0.002510 /demand 4
Electrical Equipment Automatic Bus Transfer Switch (ABT) ABT-SOP Automatic Power Transfer Switch Spurious Operation 1.25e-7 4.90e-10 4.79e-7 /hour 0
Electrical Equipment Circuit Breaker (CBK) CRB-FTOC Circuit Breaker Fails To Open/Close 0.001590 4.23e-5 0.005160 /demand 102
Electrical Equipment Circuit Breaker (CBK) CRB-SOP Circuit Breaker (All Voltages) Spurious Operation 1.73e-7 4.58e-10 6.84e-7 /hour 57
Electrical Equipment Circuit Breaker (CBK) CRBHV-FTOC High Voltage (13.8 and 16 kV) Circuit Breaker Fails To Open/Close 0.001900 0.001220 0.002710 /demand 17
Electrical Equipment Circuit Breaker (CBK) CRBHV-SOP High Voltage (13.8 and 16 Kv) Circuit Breaker Spurious Operation 3.86e-7 2.35e-7 5.66e-7 /hour 14
Electrical Equipment Circuit Breaker (CBK) CRBMV-FTOC Medium Voltage (4160 V and 6.9 kV) Circuit Breaker Fails To Open/Close 0.002640 7.09e-6 0.010400 /demand 57
Electrical Equipment Circuit Breaker (CBK) CRBMV-SOP Medium Voltage (4160 v and 6.9 Kv) Circuit Breaker Spurious Operation 1.04e-7 6.47e-8 1.51e-7 /hour 15
Electrical Equipment Circuit Breaker (CBK) CRB-FTOC-480 Low Voltage (480 V) Circuit Breaker Fails To Open/Close 8.57e-4 3.27e-6 0.003300 /demand 25
Electrical Equipment Circuit Breaker (CBK) CRB-SOP-480 Low Voltage (480 V) Circuit Breaker Spurious Operation 8.85e-8 6.26e-8 1.18e-7 /hour 27
Electrical Equipment Circuit Breaker (CBK) CRBDC-FTOC DC Circuit Breaker Fails To Open/Close 3.13e-4 1.30e-4 5.59e-4 /demand 5
Electrical Equipment Circuit Breaker (CBK) CRBDC-SOP DC Circuit Breaker Spurious Operation 1.43e-8 5.63e-11 5.50e-8 /hour 0
Electrical Equipment Inverter (INV) INV-FTOP Inverter Fails To Operate 3.49e-6 1.73e-7 1.05e-5 /hour 52
Electrical Equipment Bus (BUS) BUS-FTOP-AC AC Bus Fails To Operate 5.88e-7 2.91e-8 1.77e-6 /hour 76
Electrical Equipment Bus (BUS) BUS-FTOP-DC DC Bus Fails To Operate 7.13e-7 8.38e-8 1.86e-6 /hour 1
Electrical Equipment Motor Control Center (MCC) MCC-FTOP Motor Control Center Fails To Operate 2.43e-7 1.31e-8 7.24e-7 /hour 7
Electrical Equipment Transformer (TFM) TFM-FTOP Transformer Fails To Operate 1.93e-6 2.58e-7 4.88e-6 /hour 110
Electrical Equipment Sequencer (SEQ) SEQ-FTOP Sequencer fails To operate (as a Sub Component of the EDG) 1.06e-4 4.80e-5 1.82e-4 /demand 6
Electrical Equipment Fuse FUS-SOP Fuse Spurious Operation 8.86e-9 1.04e-9 2.31e-8 /hour 1
Strainers/Filters Filter (FLT) STR-FLT-PG-RAW Strainer Plugging (Dirty water systems) 8.20e-7 3.72e-7 1.41e-6 /hour 6
Strainers/Filters Filter (FLT) STR-FLT-ELS Filter External Leakage (Small) All Systems 5.34e-8 6.26e-9 1.39e-7 /hour 1
Strainers/Filters Filter (FLT) STR-FLT-ELL Filter External Leakage (Small) All Systems 3.74e-9 4.00e-13 1.71e-8 /hour (note c)
Strainers/Filters Filter (FLT) STR-FLT-PG-CLEAN Filter Plugging, Clean Systems 1.84e-7 2.16e-8 4.79e-7 /hour 1
Strainers/Filters Filter (FLT) STR-FLT-BYP-CLEAN Clean Systems Passive Filter Bypass 6.13e-8 2.41e-10 2.35e-7 /hour 0
Strainers/Filters Filter (FLT) STR-FLT-PG-IAS Instrument Air System Filter Plugs 2.38e-6 9.36e-9 9.15e-6 /hour 0
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-PG Self Cleaning Filter Plugging 1.51e-6 1.10e-6 1.96e-6 /hour 32
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-BYP Self Cleaning Filter Bypass 2.32e-8 9.10e-11 8.89e-8 /hour 0
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-FTOP Self Cleaning Filter Fails To Operate 2.48e-6 1.95e-6 3.06e-6 /hour 53
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-ELS Self Cleaning Filter External Leakage (Small) 1.16e-7 2.65e-8 2.56e-7 /hour 2
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-ELL Self Cleaning Filter External Leakage (Rupture) 8.12e-9 8.69e-13 3.71e-8 /hour (note c)
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-PG-SWN Normally Running Service Water Strainer Plugs 1.47e-6 9.73e-7 2.07e-6 /hour 19
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-PG-SSW Standby Service Water Strainer Plugs 1.73e-6 1.04e-6 2.57e-6 /hour 13
Strainers/Filters Self-Cleaning Strainer (FLTSC) STR-FLTSC-PG-EE-SSW Standby Service Water Strainer Plugging, Environmental 1.92e-7 2.26e-8 5.01e-7 /hour 1
Strainers/Filters Sump Strainer (SMP) STR-PG-SUMP-BWR Containment Sump Plugging (BWRs, suppression pool strainers) 9.05e-8 3.56e-10 3.48e-7 /hour 0
Strainers/Filters Sump Strainer (SMP) STR-PG-SUMP-PWR Containment Sump Plugging (PWRs) 4.25e-7 4.98e-8 1.11e-6 /hour 1
Strainers/Filters Traveling Screen Assembly (TSA) TSA-PG Traveling Screen Plugging 1.49e-6 1.11e-6 1.91e-6 /hour 37
Strainers/Filters Traveling Screen Assembly (TSA) TSA-BYP Traveling Screen Bypass 9.94e-8 2.27e-8 2.20e-7 /hour 2
Strainers/Filters Traveling Screen Assembly (TSA) TSA-FTOP Traveling Screen Fails To Operate 2.12e-6 1.30e-8 7.86e-6 /hour 45
Strainers/Filters Traveling Screen Assembly (TSA) TSA-PG-SSW Standby Service Water Traveling Screen Plugs 2.53e-7 9.98e-10 9.75e-7 /hour 0
Strainers/Filters Trash Rack (TRK) TRK-PG Trash Rack Plugging 3.80e-7 1.50e-9 1.47e-6 /hour 0
RPS Bistable (BIS) BIS-FTOP Bistable Fails To Operate 5.44e-4 2.14e-6 0.002090 /demand 55
RPS Process Logic Components PLF-FTOP Process Logic (Flow) Fails To Operate 6.25e-4 2.46e-6 0.002400 /demand (note d)
RPS Process Logic Components PLL-FTOP Process Logic (Level) Fails To Operate 6.25e-4 2.46e-6 0.002400 /demand 3
RPS Process Logic Components PLP-FTOP Process Logic (Pressure) Fails To Operate 1.60e-4 6.29e-7 6.15e-4 /demand 6
RPS Process Logic Components PLDT-FTOP Process Logic (Delta Temperature) Fails To Operate 0.005070 2.01e-5 0.019400 /demand 24
RPS Sensor/Transmitter Components STF-FTOP-D Sensor/Transmitter (Flow) Fails To Operate on Demand 8.15e-4 3.21e-6 0.003130 /demand (note d)
RPS Sensor/Transmitter Components STF-FTOP-R Sensor/Transmitter (Flow) Fails To Operate per Hour 1.02e-7 4.00e-10 3.91e-7 /hour (note d)
RPS Sensor/Transmitter Components STL-FTOP-D Sensor/Transmitter (Level) Fails To Operate on Demand 8.15e-4 3.21e-6 0.003130 /demand 5
RPS Sensor/Transmitter Components STL-FTOP-R Sensor/Transmitter (Level) Fails To Operate per Hour 1.02e-7 4.00e-10 3.91e-7 /hour 0
RPS Sensor/Transmitter Components STP-FTOP-D Sensor/Transmitter (Pressure) Fails To Operate on Demand 1.17e-4 4.60e-7 4.49e-4 /demand 2
RPS Sensor/Transmitter Components STP-FTOP-R Sensor/Transmitter (Pressure) Fails To Operate per Hour 8.22e-7 3.23e-9 3.16e-6 /hour 35
RPS Sensor/Transmitter Components STT-FTOP-D Sensor/Transmitter (Temperature) Fails To Operate on Demand 4.32e-4 1.70e-6 0.001660 /demand 17
RPS Sensor/Transmitter Components STT-FTOP-R Sensor/Transmitter (Temperature) Fails To Operate per Hour 8.40e-7 3.30e-9 3.23e-6 /hour 29
RPS Reactor Trip Breaker (RTB) RTB-FTOC-BME RPS Breaker (Mechanical) Fails To Open/Close 1.54e-5 6.06e-8 5.92e-5 /demand 1
RPS Reactor Trip Breaker (RTB) RTB-FTOP-BSN RPS Breaker (Shunt Trip) Fails To Operate 3.29e-4 1.29e-6 0.001260 /demand 14
RPS Reactor Trip Breaker (RTB) RTB-FTOP-BUV RPS Breaker (Undervoltage Trip) Fails To Operate 4.13e-4 1.62e-6 0.001580 /demand 23
RPS Reactor Trip Breaker (RTB) RTB-FTOC RPS Breaker (Combined) Fails To Open/Close 1.55e-5 6.11e-8 5.97e-5 /demand --
RPS Manual Switch (MSW) MSW-FTOC Manual Switch Fails To Open/Close 1.26e-4 4.97e-7 4.85e-4 /demand 2
RPS Relay (RLY) RLY-FTOP Relay Fails To Operate 2.48e-5 9.77e-8 9.54e-5 /demand 24
Control Rods Control Rod Drive (CRD) CRD-FTOP Control Rod Drive Fails To Insert Rod 1.68e-7 1.16e-9 6.18e-7 /demand 19
Control Rods Control Rod Drive (CRD) CRD-SOP Control Rod Drive Spurious Operation 1.62e-7 1.11e-7 2.21e-7 /hour 23
Control Rods Control Rod (ROD) ROD-FTOP Control Rod Fails To Operate/ Insert Rod 9.51e-8 5.27e-8 1.49e-7 /demand 10
Control Rods Control Rod (ROD) ROD-SOP Control Rod Spurious Operation 1.04e-7 5.95e-8 1.60e-7 /hour 11
Control Rods Hydraulic Control Unit (HCU) HCU-FTI Hydraulic Control Unit Components Fail 1.10e-7 1.05e-9 4.19e-7 /demand --
Control Rods Hydraulic Control Unit (HCU) HCU-FTOP Hydraulic Control Unit Fails To Operate 1.45e-8 9.52e-9 2.02e-8 /hour 19
Control Rods Hydraulic Control Unit (HCU) HCU-SOP Hydraulic Control Unit Spurious Operation 1.99e-8 7.14e-9 3.79e-8 /hour 27
Heating & Ventilation Air Damper (DMP) AOD-FTOC Air-Operated Damper Fails To Open/Close 7.57e-5 2.98e-7 2.91e-4 /demand 0
Heating & Ventilation Air Damper (DMP) AOD-SOP Air-Operated Damper Spurious Operation 1.61e-7 1.29e-9 5.86e-7 /hour 4
Heating & Ventilation Air Damper (DMP) AOD-ILS Air-Operated Damper Internal Leakage (Small) 1.44e-7 4.46e-8 2.89e-7 /hour 3
Heating & Ventilation Air Damper (DMP) AOD-ILL Air-Operated Damper Internal Leakage (Rupture) 2.88e-9 3.08e-13 1.32e-8 /hour (note c)
Heating & Ventilation Air Damper (DMP) HOD-FTOC Hydraulic-Operated Damper Fails To Open/Close 7.36e-4 2.72e-4 0.001380 /demand 4
Heating & Ventilation Air Damper (DMP) HOD-SOP Hydraulic-Operated Damper Spurious Operation 1.52e-7 3.47e-8 3.35e-7 /hour 2
Heating & Ventilation Air Damper (DMP) HOD-ILS Hydraulic-Operated Damper Internal Leakage (Small) 3.04e-8 1.19e-10 1.16e-7 /hour 0
Heating & Ventilation Air Damper (DMP) HOD-ILL Hydraulic-Operated Damper Internal Leakage (Rupture) 6.08e-10 6.51e-14 2.78e-9 /hour (note c)
Heating & Ventilation Air Damper (DMP) MOD-FTOC Motor-Operated Damper Fails To Open 3.56e-4 1.74e-5 0.001070 /demand 11
Heating & Ventilation Air Damper (DMP) MOD-SOP Motor-Operated Damper Spurious Operation 3.54e-8 1.39e-10 1.36e-7 /hour 0
Heating & Ventilation Air Damper (DMP) MOD-ILS Motor-Operated Damper Internal Leakage (Small) 3.54e-8 1.39e-10 1.36e-7 /demand 0
Heating & Ventilation Air Damper (DMP) MOD-ILL Motor-Operated Damper Internal Leakage (Rupture) 7.08e-10 7.58e-14 3.24e-9 /hour (note c)
Heating & Ventilation Air Handling AHU-FTS-NR Air Handling Unit Fails To Start, Normally Running 0.001470 0.001010 0.002000 /demand 23
Heating & Ventilation Air Handling AHU-FTR-NR Air Handling Unit Fails To Run, Normally Running 2.61e-6 1.97e-6 3.34e-6 /hour 39
Heating & Ventilation Air Handling AHU-FTS-NS Air Handling Unit Fails To Start, Normally Standby 2.11e-4 1.55e-4 2.74e-4 /demand 33
Heating & Ventilation Air Handling AHU-FTR<1H Air Handling Unit Fails To Run <1H, Normally Standby 3.38e-6 1.33e-8 1.30e-5 /hour 0
Heating & Ventilation Air Handling AHU-FTR>1H Air Handling Unit Fails To Run >1H, Normally Standby 2.77e-6 1.96e-6 3.69e-6 /hour 27
Heating & Ventilation Chiller (CHL) CHL-FTS-NR Chiller Unit Fails To Start, Normally Running 0.005090 9.52e-6 0.020500 /demand 66
Heating & Ventilation Chiller (CHL) CHL-FTR-NR Chiller Unit Fails To Run, Normally Running 3.87e-5 1.94e-7 1.47e-4 /hour 179
Heating & Ventilation Chiller (CHL) CHL-FTS-NS Chiller Unit Fails To Start, Normally Standby 2.78e-5 1.09e-7 1.07e-4 /demand 0
Heating & Ventilation Chiller (CHL) CHL-FTR<1H Chiller Unit Fails To Run <1H, Normally Standby 1.48e-4 1.09e-4 1.91e-4 /hour 34
Heating & Ventilation Chiller (CHL) CHL-FTR>1H Chiller Unit Fails To Run >1H, Normally Standby 1.48e-4 1.09e-4 1.91e-4 /hour 34
Heating & Ventilation Fan (FAN) FAN-FTS-NS HVC Fan Fails To Start, Normally Standby 2.76e-4 1.77e-4 3.92e-4 /demand 17
Heating & Ventilation Fan (FAN) FAN-FTR<1H HVC Fan FTR<1H, Normally Standby 4.44e-4 2.85e-4 6.32e-4 /hour 17
Heating & Ventilation Fan (FAN) FAN-FTR>1H HVC Fan FTR>1H, Normally Standby 2.91e-5 9.03e-6 5.86e-5 /hour 3
Heating & Ventilation Fan (FAN) FAN-FTS-NR HVC Fan Fails To Start, Normally Running 7.15e-4 1.69e-6 0.002840 /demand 28
Heating & Ventilation Fan (FAN) FAN-FTR-NR HVC Fan Fails To Run, Normally Running 3.23e-6 4.87e-8 1.11e-5 /hour 50
Miscellaneous Equipment Air Compressor (CMP) MDC-FTS-NR Motor-Driven Compressor Fails To Start, Normally Running 0.013600 3.28e-5 0.053600 /demand 52
Miscellaneous Equipment Air Compressor (CMP) MDC-FTR-NR Motor-Driven Compressor Fails To Run 4.03e-5 9.92e-6 8.72e-5 /hour 173
Miscellaneous Equipment Air Compressor (CMP) MDC-FTS-NS Motor-Driven Compressor Fails To Start, Normally Standby 0.002930 9.56e-5 0.009270 /demand 34
Miscellaneous Equipment Air Compressor (CMP) MDC-FTR<1H Motor-Driven Compressor Fails To Run (0 To 1 Hour) 7.41e-5 8.71e-6 1.93e-4 /hour 1
Miscellaneous Equipment Air Compressor (CMP) MDC-FTR>1H Motor-Driven Compressor Fails To Run (> 1 Hour) 5.75e-5 4.81e-5 6.80e-5 /hour 90
Miscellaneous Equipment Air Compressor (CMP) EDC-FTS-NS Engine-Driven Compressor Fails To Start, Normally Standby 0.009930 0.006060 0.014500 /demand 14
Miscellaneous Equipment Air Compressor (CMP) EDC-FTR<1H Engine-Driven Compressor Fails To Run <1H, Normally Standby 0.001030 1.20e-4 0.002680 /hour 1
Miscellaneous Equipment Air Compressor (CMP) EDC-FTR>1H Engine-Driven Compressor Fails To Run >1H, Normally Standby 0.007770 0.004540 0.011700 /hour 12
Miscellaneous Equipment Air Compressor (CMP) EDC-FTR-NR Engine-Driven Compressor Fails To Run, Normally Running 6.43e-5 3.56e-5 1.00e-4 /demand 10
Miscellaneous Equipment Air Compressor (CMP) MDC-FTR-IAS Instrument Air System Motor-Driven Compressor Fails To Run 4.93e-5 2.41e-5 8.22e-5 /hour 117
Miscellaneous Equipment Air Compressor (CMP) MDC-FTR-CIA Containment Instrument Air Motor-Driven Compressor Fails To Run 5.07e-6 1.99e-8 1.95e-5 /hour 0
Miscellaneous Equipment Air Drier Unit (ADU) ADU-FTOP Air dryer unit fails To operate 5.00e-6 5.35e-10 2.29e-5 /hour --
Miscellaneous Equipment Accumulator (ACC) ACC-FTOP Accumulator Fails To Operate 1.45e-7 8.25e-8 2.22e-7 /hour 11
Miscellaneous Equipment Accumulator (ACC) ACC-ELS Accumulator External Leakage (Small) 1.07e-7 5.47e-8 1.74e-7 /hour 8
Miscellaneous Equipment Accumulator (ACC) ACC-ELL Accumulator External Leakage (Rupture) 7.49e-9 8.02e-13 3.43e-8 /hour (note c)
Miscellaneous Equipment Cooling Tower Fan (CTF) CTF-FTS-NS Cooling Tower Fan Fails To Start (Standby) 3.89e-4 2.37e-4 5.70e-4 /demand 14
Miscellaneous Equipment Cooling Tower Fan (CTF) CTF-FTR<1H Cooling Tower Fan Fails To Run <1H (Standby) 1.34e-5 5.29e-8 5.16e-5 /hour 0
Miscellaneous Equipment Cooling Tower Fan (CTF) CTF--FTR>1H Cooling Tower Fan Fails To Run >1H (Standby) 5.58e-7 2.20e-9 2.15e-6 /hour 0
Miscellaneous Equipment Cooling Tower Fan (CTF) CTF-FTS-NR Cooling Tower Fan Fails To Start 6.70e-4 7.85e-5 0.001740 /demand 1
Miscellaneous Equipment Cooling Tower Fan (CTF) CTF-FTR-NR Cooling Tower Fan Fails To Run 5.18e-6 2.36e-6 8.94e-6 /hour 6
Miscellaneous Equipment Tank (TNK) TNK-FC Tank Rupture 4.18e-7 5.99e-10 1.72e-6 /hour 16
Miscellaneous Equipment Tank (TNK) TNK-PRESS-LIQ-ELS Pressurized Liquid Tank Small Leakage External Leakage (Small) 2.51e-7 8.76e-10 9.71e-7 /hour 5
Miscellaneous Equipment Tank (TNK) TNK-PRESS-LIQ-ELL Pressurized Liquid Tank Small Leakage External Leakage (Rupture) 1.76e-8 1.88e-12 8.04e-8 /hour (note c)
Miscellaneous Equipment Tank (TNK) TNK-UNPRESS-LIQ-ELS Unpressurized Liquid Tank Small Leakage External Leakage (Small) 1.98e-7 7.32e-8 3.73e-7 /hour 4
Miscellaneous Equipment Tank (TNK) TNK-UNPRESS-LIQ-ELL Unpressurized Liquid Tank Small Leakage External Leakage (Rupture) 1.39e-8 1.48e-12 6.34e-8 /hour (note c)
Miscellaneous Equipment Tank (TNK) TNK-FC-IAS Instrument Air System Tank Fails To Control 1.52e-7 5.98e-10 5.84e-7 /hour 0
Miscellaneous Equipment Tank (TNK) TNK-FC-SSW Standby Service Water Tank Fails To Control 5.68e-7 2.23e-9 2.18e-6 /hour 0
Miscellaneous Equipment Tank (TNK) TNK-GAS-ELS Gas Tank Small Leakage External Leakage (Small) 1.19e-7 4.67e-10 4.56e-7 /hour 0
Miscellaneous Equipment Tank (TNK) TNK-GAS-ELL Gas Tank Small Leakage External Leakage (Rupture) 8.33e-9 8.92e-13 3.81e-8 /hour (note c)
Miscellaneous Equipment Orifice (ORF) ORF-PG Orifice Plugging 1.00e-6 1.07e-10 4.57e-6 /hour --
Miscellaneous Equipment Pipe (PIPE) PIPE-OTHER-ELS Piping Non-Service Water System External Leak Small 2.53e-10 9.94e-13 9.71e-10 h-ft 4.5
Miscellaneous Equipment Pipe (PIPE) PIPE-OTHER-ELL Piping Non-Service Water System External Leak Large 2.53e-11 2.70e-15 1.16e-10 h-ft (note c)
Miscellaneous Equipment Pipe (PIPE) PIPE-SWS-ELS Piping Service Water System External Leak Small 6.89e-10 2.71e-12 2.65e-9 h-ft 8.5
Miscellaneous Equipment Pipe (PIPE) PIPE-SWS-ELL Piping Service Water System External Leak Large 1.38e-10 1.48e-14 6.30e-10 h-ft (note c)
Miscellaneous Equipment Heat Exchanger (HTX) HTX-LOHT Heat Exchanger Plugging/Loss of Heat Transfer 3.39e-7 1.11e-9 1.32e-6 /hour 67
Miscellaneous Equipment Heat Exchanger (HTX) HTX-ILS Heat Exchanger Internal Leakage (Small) 2.76e-7 2.21e-7 3.36e-7 /hour 61
Miscellaneous Equipment Heat Exchanger (HTX) HTX-ILL Heat Exchanger Internal Leakage (Rupture) 5.52e-9 5.91e-13 2.53e-8 /hour (note c)
Miscellaneous Equipment Heat Exchanger (HTX) HTX-ELS Heat Exchanger External Leakage (Small) 1.90e-7 5.71e-9 6.08e-7 /hour 38
Miscellaneous Equipment Heat Exchanger (HTX) HTX-ELL Heat Exchanger External Leakage (Rupture) 2.85e-8 3.05e-12 1.30e-7 /hour (note c)
Miscellaneous Equipment Heat Exchanger (HTX) HTX-PG-CCW Heat Exchanger Plugging Non Standby 3.01e-7 1.53e-7 4.87e-7 /hour 8
Miscellaneous Equipment Heat Exchanger (HTX) HTX-PG-NE-CCW Component Cooling Water Heat Exchanger Plugging Non-ExEE (hr-1) 1.24e-7 3.83e-8 2.49e-7 /hour 3
Miscellaneous Equipment Instrumentation ICC-FC Instrumentation and Control Circuit Fails 0.001700 6.89e-4 0.003330 /demand 0
Miscellaneous Equipment Instrumentation ICC-FA Failure of Instrument and Control for a Turbine Trip 0.001700 6.89e-4 0.003330 /demand 0
Miscellaneous Equipment Instrumentation ACT-FC Automatic Actuation and Control Circuit Fails 0.001700 6.89e-4 0.003330 /demand 0

Failure probability (per demand) or rate (per hour) with the 5th/95th of the industry distribution. Source: SPAR 2020 Parameter Estimation Update, EPIX/RADS.

LOOP Offsite-Power Non-Recovery 188 timed events, 1987-2022

Probability that offsite power is not yet recovered by a given time after a loss-of-offsite-power event (industry-wide). Median restoration: 156 min (2.6 h).

Time after LOOPNon-recovery probabilityP(not recovered)
30 min
   
0.856
1 h
   
0.723
2 h
   
0.580
4 h
   
0.420
8 h
   
0.319
24 h
   
0.144

LOOP events by cause: switchyard-centered 86, plant-centered 40, weather-related 37, grid-related 26. Industry-average LOOP frequency (power ops) is provided in the POET NRC comparison (PO.LOOP). Source: NRC/INL LOOP study.

Common-Cause Failure (CCF) Alpha-Factors SPAR 2020 Rev.1

Alpha-factor CCF parameters by component group and common-cause component group size (CCCG). Large dataset, loaded on demand.