Common Cause Failure Insights
Insights studies were performed on the set of common-cause failures (CCF) of emergency diesel generators, motor-operated valves, motor-driven pumps, and circuit breakers. The data studied were derived from the NRC CCF database, which is based on U.S. commercial nuclear reactor power plant data. These reports are the result of in-depth reviews of the CCF data for these components. The objective of these reports are to look beyond the CCF parameter estimates to gain further understanding of why CCF events occur and what measures may be taken to prevent, or at least mitigate the effect of these CCF events.
The insight studies are documented in "Common-Cause Failure Event Insights" (NUREG/CR-6819), Volumes 1 through 4. The links below provide the current information for the study and latest results.
Quantitative Results:
- Current Results:
- Historical Results:
- Emergency Diesel Generator (EDG) 2000 Summary
- Motor Operated Valves (MOV) 2000 Summary
- Pumps 2000 Summary
- Circuit Breakers 2000 Summary
Insights Studies NUREG/CR-6819:
- Volume 1: Emergency Diesel Generators
- Volume 2: Motor-Operated Valves
- Volume 3: Pumps
- Volume 4: Circuit Breakers
