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.
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Component Reliability 307 parameters · SPAR 2020
| Group | Component | Code | Description | Mean | 5th | 95th | Units | Failures |
|---|---|---|---|---|---|---|---|---|
| 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 LOOP | Non-recovery probability | P(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.