On the Use of Importance Measure in Option 2

摘要

In Option of risk informed regulation &rnapplications, the determination of risk significant Structure,rnSystem and Components (SSCs) plays an important role,rnand importance measures such as Fussell-Vesely (FV) andrnRisk Achievement Worth (RAW)[,] are widely used inrnthe determination of risk significant SSCs. In the GradedrnQuality Assurance (GQA)[] or Option , the number ofrnSSCs to be categorized is too many to handle, so the FVsrnand RAWs of the components are practically derived in arnconvenient way with those of the basic events which havernalready been acquired as Probabilistic Safety Assessmentrn(PSA) results instead of by reevaluating the fault tree/eventrntree of the PSA model.