About the Reliability Calculator
The U. S. Nuclear Regulatory Commission (NRC) in conjunction with the Idaho National Laboratory (INL) developed software to evaluate data for use in Probabilistic Risk Assessments (PRA).
The software uses US commercial nuclear power plant data and statistical routines to provide statistical analysis of the data.
The Reliability Calculator uses these statistical routines to allow risk analysts to statistically analyze their own data and is available to the public.
The Reliability Calculator analyzes two basic types of data; ‘Un-partitioned Data’ and ‘Partitioned Data’.
· Un-partitioned Data is data that the analyst only knows the total failures(events) and total demands(run hours).
· Partitioned Data is data that has been kept at some level of detail and should consist of a list of pairs of failures(events) and demands(run hours). These pairs can be rolled up from more detailed data—as in trending data which would be a pair summed over the year.
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