參考說明案例

DraftedCheckedReviewedApprovedAPLANTPHASEI(2×1000MW)文件編碼DOC. 題核輔助廠房通風(fēng)系統(tǒng)手冊SystemManual-第7-8章Chapters7，8安全分析、維修 ysis,Project文件類型Sub-ItemEngineeringBasicBA:B:√C:NationalAgradeengineeringdesigning,CertificationNO:A144008121 中廣核工程設(shè) CertificationNO: 編碼Internal isthepropertyofCNPDCItmustnotbeused、reproduced、transmittedordisclosedwithoutthepriorwrittenpermissionofCNPDC本文件之屬于中廣核工程設(shè)計(jì)。未獲本公司REVISION版日狀編Drafted校Checked審Reviewed批Approved修改—說明Modification-A竹防城港核電廠一期（2×1000MW）工PLANTPHASEI(2×1000MW)核輔助廠房通風(fēng)系統(tǒng)手冊SystemManual7-8Chapters安全分析，維修 ysis,文件修改記錄版日章頁修改范圍及依據(jù)AISSUETOC\o"1-2"\h\z\u Special- MAINTENANCEANDPERIODICTEST Periodic TheDVNsystemservesnosafetyfunctionandhasnosafetydesignbasis;neverthelessthefollowingspecialprovisionshavebeenmade.Special-—InchargingpumproomsNA217andNB227,ductsaredesignednottofallincaseofSafeShutdownEarthquake.—AllfireprotectedductsaredesignedtokeepintegrityincaseofSafeShutdown—SincetheDVKandDVWexhaustsubsystemsaredesignedtowithstandaSafeShutdownEarthquake,theDVNexhaustplenum(NB561–761–861)isseismicclassifiedbecauseitformsapartofthecivilengineeredstructure.—TheDVNstackisdesignedtowithstandaSafeShutdownEarthquakeora—IneachboricacidroomNA213andNB223,twounitheaters(2x100%)areinstalled,poweredrespectivelybyUnittrainsAandB,andemergencypowerd.—IntheboricacidroomNB385,twounitheaters(2x100%)areinstalled,poweredrespectivelybytrainAofUnit1andUnit2,andemergencypowerd.—IneachboricacidroomNA251–256,ND252–257,ND253,ND239,ND305,ND306,ND307,twoheaters(2x100%)areinstalledandpoweredrespectivelybytrainAofUnit1andUnit2.—Thestackflowtransmitters09DVN001and002MDbelongtothePAMS(Post–accidentmonitoringsystem)andaresafetyclassifiedlE.MAINTENANCEANDPERIODICTESTSmallmaintenanceoperationsmaybecarriedoutwithoutstoptheReplacementoffaultyfanpartsshallbecarriedoutasfastaspossibletolimittheunavailabilitytimeofthefan.MaintenanceoperationsarecarriedoutaccordingtoEquipmentOperationandMaintenanceManuals.HEPAfiltersandiodineadsorbersshallbedischargedandremovedinvinylPeriodicNotapplicable.PeriodicoperatingNoprovisionismadeforperiodictestsonDVNsystem(see§8.2.4foriodineadsorbersefficiencytesting).Notapplicable.AdditionalIodinead