AbstractPast reports have estimated occurrence rates for certain multiple failure events. These reports are based on the binomial failure rate (BFR) common cause model and on licensee event report data. Uncertainty distributions for the four basic BFR parameters formed the basis of the past reports. These distributions are tabulated, and from them an analyst can estimate, with uncertainty bounds, the rate or probability of a quite arbitrary multiple failure event. No longer is there a restriction to those events for which rates have been published.