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ID:39970540
大小:593.46 KB
页数:13页
时间:2019-07-16
《Human Factor Effects on the Safety Integrity Level Assigned to Safety-》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、HumanFactorEffectsontheSafetyIntegrityLevelAssignedtoSafety-RelatedElectricalControlSystemintheOperationalPhaseRobertaPirani,MicaelaDemichelaDepartmentofChemicalEngineering-SafeRPolitecnicodiTorinoCorsoDucadegliAbruzzi,24-10129Torino-ItalyAbstractThestandardIEC62061isamachinesectorspecific
2、ation,itintendedtofacilitatethespecificationoftheperformanceofsafety-relatedelectricalcontrolsystemsinrelationtothesignificanthazardsofmachines.Thisprojectstartedfromacasestudyonapresswhereanaccidentoccurred.Throughanappropriateriskanalysisandreliabilitydataapriorityofinterventionshasbeend
3、efinedtoreducerisksinthespecificmachineunderinvestigation.Themaintargetoftheanalysiswastotesttheapplicabilityofmostrecentgenerationstandards,thatarenotyetfullyacquiredbydifferentindustries,andtoverifytheireffectiveness.Basedontheresultsachievedbythefirstphaseofwork,thesecondobjectiveconsis
4、tsofdevisingamethodtoaccountqualitativelyandquantitativelyforthehumanfactorinverifytheIntegrityLevelofSafetysystem(SIL)called“operationalSIL”whichmaydifferfromthedesignSIL,duetotheimpactofhumanandorganizationalfactors(H&OF)intheoperationalphase.Thedesignofautomaticsystemsandthecontrolofthe
5、interactionwithoperatorshavebecomemuchmorecomplex.Inparticular,theconsequencesofanerroneoushumanactionorofa“misunderstanding”betweenhumanbeingsandtechnologies,canhaveunrecoverableanddangerousconsequences.OnceSILassignedtoSafety-RelatedElectricalControlSystem(SRECS)foragoodqualityassessment
6、toidentifythepossiblecausesandthepossibleconsequencesoftheunforeseenactionsidentified,toconsiderhumanerrorwasessential.AnOperabilityAnalysis,whichisusuallyknownwiththeacronymHAZOP(HazardandOperabilitystudies)isusedtosupporttheassessment,butwithsomeaddedfeaturesthatenableonetoaccommodatesys
7、tematicallyH&OFintotheprocesscalledIntegratedRecursiveOperabilityAnalysisframework(IROA)[Colombo,Demichela,2008].FortheapplicationofthemethoditwasimportanttounderstandwhatcandotheoperatoronSRECSsothatthesystemdoesnotreact,studyingwhatcouldhappenwithanimproperm
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