FunctionalsafetyEngineering-PrinciplesofRiskManagementExtendedAutomationSystem800xA©ABB-1PageFunctionalsafetyPrincipleofRiskManagement„RiskDefinition„MeasuringRisk„RiskTolerance„RiskReduction„SafetyLifecycleandRisk„HazardAnalysis„ConsequenceandLikelihood©ABB-2PageFunctionalsafetyWhatisRisk?Whatcanhappen?Consequence*Likelihood(frequency)(10peopledead)*(every200years)CalculatedProcessRiskProcessDesignOtherRiskReduction,SuchasAlarming,andExceptionProceduresRiskSafetyInstrumentedSystemTolerableLevelofRisk(Definedbyuserperapplication)RiskReductionistheHighestPriorityHowoftencanithappenedandwhatistheeffectifitdoes?©ABB-3PageFunctionalsafetyWhatisRisk?„Riskisameasureofthelikelihoodandconsequenceofanunwantedhappening.„Howoftencanithappenedand„whatwillbetheeffect(consequence)ifitdoes?©ABB-4PageFunctionalsafetyRiskreceptors/Impact„Personnel„Environment„Financial„Equipment/propertydamage„BusinessInterruption„BusinessLiability„CompanyImage„LostMarketShare©ABB-5PageFunctionalsafetyWhydoescompaniesmanagerisk?„Companieshavealegal,moralandfinancialobligationtolimitriskposedbytheiroperation.„Understandingthewaythisisexpressedinacompanyhelpstodevelopsafetypolicyconsistentwiththewaythatcompanyalreadyworks.Makeplantassafeaspossible,disregardcostComplywithregulationsmoralBuildthelowestaswritten,regardlessofcostplant,keepcostoractuallevelofriskoperatingbudgetasLegalFinancialsmallaspossible©ABB-6PageFunctionalsafetyRiskreduction:GeneralconceptsActualRisktoplantremainingmeetLevelunderriskofSafetycontrolRiskNecessaryminimumriskreductionIncreasingriskActualriskreductionPartialriskcoveredPartialriskcoveredPartialriskcoveredbyOtherTechnologybyE/E/PESbyExternalRisksafety-relatedprotectivesystemssystemsReductionFacilitiesRiskreductionachievedbyallprotectivesystems&ExternalRiskReductionFacilitiesMechanicalFirepumps,foamsystems,equipmentlikewatercurtains,delugereliefevalve,nonsystems,v