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ID:52912463
大小:157.81 KB
页数:18页
时间:2020-03-31
《《风险评价技术及方法》PreliminaryHazardList.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、Chapter4PreliminaryHazardList4.1INTRODUCTIONThepreliminaryhazardlist(PHL)isananalysistechniqueforidentifyingandlistingpotentialhazardsandmishapsthatmayexistinasystem.ThePHLisperformedduringconceptualorpreliminarydesignandisthestartingpointforallsubsequenthazardana
2、lyses.OnceahazardisidentifiedinthePHL,thehazardwillbeusedtolaunchin-depthhazardanalysesandevaluations,asmoresystemdesigndetailsbecomeavailable.ThePHLisameansformanagementtofocusonhazardousareasthatmayrequiremoreresourcestoeliminatethehazardorcontrolrisktoanacceptab
3、lelevel.EveryhazardidentifiedonthePHLwillbeanalyzedwithmoredetailedanalysistechniques.Thisanalysistechniquefallsundertheconceptualdesignhazardanalysistype(CD-HAT).ThePHLevaluatesdesignattheconceptuallevel,withoutdetailedinformation,anditprovidesapreliminarylistofha
4、zards.Therearenoalternatenamesforthistechnique.4.2BACKGROUNDTheprimarypurposeofthePHListoidentifyandlistpotentialsystemhazards.AsecondarypurposeofthePHListoidentifysafetycriticalparametersandmishapcategories.ThePHLanalysisisusuallyperformedveryearlyinthedesigndeve
5、lop-mentprocessandpriortoperforminganyotherhazardanalysis.ThePHLisusedasamanagementtooltoallocateresourcestoparticularlyhazardousareaswithinthedesign,anditbecomesthefoundationforallothersubsequenthazardanalysesHazardAnalysisTechniquesforSystemSafety,byCliftonA.Eri
6、cson,IICopyright#2005JohnWiley&Sons,Inc.5556PRELIMINARYHAZARDLISTperformedontheprogram.Follow-onhazardanalyseswillevaluatethesehazardsingreaterdetailasthedesigndetailprogresses.TheintentofthePHListoaffectthedesignforsafetyasearlyaspossibleinthedevelopmentprogram.T
7、hePHLisapplicabletoanytypeofsystemataconceptualorpreliminarystageofdevelopment.ThePHLcanbeperformedonasubsystem,asinglesystem,oranintegratedsetofsystems.ThePHLisgenerallybasedonpreliminarydesigncon-ceptsandisusuallyperformedearlyinthedevelopmentprocess,sometimesdu
8、ringtheproposalphaseorimmediatelyaftercontractawardinordertoinfluencedesignandmishapriskdecisionsasthedesignisformulatedanddeveloped.Thetechnique,whenapp
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