4b chemical tanker simulator verification tank cleaning system • overboard discharge and...
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Tanker Officer Training Standards (TOTS)
4B Chemical Tanker Simulator Verification Course
4B Chemical Tanker Simulator Verification Course
CONTENTS
Prerequisites..............................................................................................................................................................................1TOTS Reference....................................................................................................................................................................1Simulator Exercises...........................................................................................................................................................1Exercise Descriptions.......................................................................................................................................................1Physical Realism....................................................................................................................................................................2Behavioural Realism..........................................................................................................................................................2Operating Environment...................................................................................................................................................2Simulator Facility...................................................................................................................................................................2
SimulatorExercisesExercise 1. CargoTankPreparation...................................................................................................................3Exercise 2. CommencingLoading.......................................................................................................................5Exercise 3. Multipleoperations–continueloading,loadintofurthertanks, de-ballasting..............................................................................................................................................7Exercise 4. Multipleoperations–toppingoff,loadingandde-ballasting...........................8Exercise 5. Loadedvoyage–agitationandtankpreparation......................................................9Exercise 6. Commencesimultaneousloadanddischarge..............................................................10Exercise 7. Pre-wash10pand10suponcompletionofdischargeofthe DioctylPhthalate...................................................................................................................................12Exercise 8. Completethedischarge,strippingtherequisitetanks..........................................14Exercise 9. Tankwashing,ventilationandcargocoolingwhileatsea...................................15Exercise 10. Decantpermissibletankwashingsatsea........................................................................17
Appendix I CargoStowagePlan–Afterfirstloadport....................................................................18Appendix II CargoStowagePlan–Aftersecondload/firstdischarge.................................19
Tanker Officer Training Standards (TOTS)
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INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 1
Tanker Officer Training Standards (TOTS)
4B Chemical Tanker Simulator Verification Course
Prerequisites ThesesimulatorassessmentshavebeendesignedtotakeplaceattheendoftheTankerOfficerTrainingScheme.Thereforeitisexpectedthatcandidateswillhavehadconsiderableexperienceoftheoperationssimulatedhere.Theywillneedthisexperienceinordertobepreparedforthefollowingassessment.
CompetenceDemonstration S Simulated
Q Questioning
TOTS Reference CompetenceTOTS4B Verificationinchemicaltankeroperations
Simulator ExercisesExercise 1. Cargotankpreparation
Exercise 2. Commenceloading
Exercise 3. Multipleoperations,continueloading,loadintofurthertanks,de-ballasting
Exercise 4. Multipleoperations,toppingoff,loading,de-ballasting
Exercise 5. Loadedvoyage,agitationandtankpreparation
Exercise 6. Commencesimultaneousloadanddischarge
Exercise 7. Pre-wash10P&Soncompletionofdischarge
Exercise 8. Completedischargeandstripping
Exercise 9. Tankwashing,ventilationandcargocooling
Exercise 10. Decantpermissiblewashingstosea
Exercise 11. Wash,ventilation,&cooling
Exercise 12. DischargeresiduesatseaaccordingtoMARPOL
Appendix I CargoStowagePlan–AfterfirstloadportAppendix IICargoStowagePlan–Aftersecondload/firstdischarg
Exercise DescriptionsWhatfollowsbywayofexercisedescriptionshasbeenwrittenintheformofstudents’objectives.Inordertopreventmultipleduplication,thenotesmayalsoformguidanceforinstructors.
Forinstructor,supervisorandassessorqualificationsseeSTCW95RegulationI/6,SectionA-I/6paragraph3andA-I/12paragraphs6to9.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course2
Physical Realism IMO Model Course 1.04 Part D Appendix 9Thesimulatorusedshouldfulfilthefollowingminimumrequirements:
• Itwillsimulateatypicalcargohandlingsystemfoundonachemicaltankerbasedonrealoperationalvessels.• Theequipmentisarrangedinashiplikemanner.
Thesimulatorincludesthefollowingcomponentsandsubsystems:
• Cargocontrolsystem• Ballastcontrolsystem• Tankcleaningsystem• Overboarddischargeandmonitoringsystems• Tankcontentmonitoringsystems• Inert/ventingcontrolsystemincludingsparging,gasfreeing,purgingandaerating.• Tankatmospherecontrolsystem• Alarmsystem• Communicationsystem• Cargopumpingsystem• Asystemforcommunicatingwith‘theoutsideworld’• Astabilityandstresscalculator.
Additionalresources: Ship/shorechecklist Tankwashingchecklist NLSCargorecordbookextracts Logsheets
Behavioural Realism IMO Model Course 1.04 Part D Appendix 9Thesimulatormodelreplicatesthedynamicbehaviourofthecargohandlingsystemanditsparameters.Furthermore,thesimulatormodelsimulatesthecomponents,theirprocessesandcontrolsystems.Itwillbepossibletointroducefailures,breakdownsandweartoallequipmentsimulated.
Operating Environment IMO Model Course 1.04 Part D Appendix 9Thesimulatorwillsimulaterestrictionsandfailuresinthecargotransfer,forinstance,introducedbythesimulatedshoreterminal.Alarmswillbeannouncedbyflashingalarmlampsandsoundinthe‘cargocontrolroom’.
Simulator FacilityTheseexerciseshavebeenwrittentakingintoaccountthevarietyofsimulatorswhichmaybeusedtofacilitatethem.Asfewspecificfeaturesaspossiblehavebeenfeatured,soastoincreasetheadaptabilityoftheexercisestothevarioussimulatorsavailable.
Thetankerinthispackageisdoublehulled,has10pairsofwingtanks,2to8ofwhicharesub-dividedintocentreandwingspaces.Eachtankhasitsownpump,ventlineandmanifold.Therearetwoballastpumps.Theballasttankarrangementhasnotbeenspecified.
However,thesimulatorshouldhaveitsownCargoOperationsManualwhichwillbeusedduringtheprogramme.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 3
EXERCISE 1 Cargo Tank Preparation
Current StatusThevesseliscurrentlyatseaontheballastvoyagehavingrecentlyleftdrydock.Mostcargotankshavebeenpreparedforloading,howeverthefollowingtanksrequirewashingwithhotfreshwater,6CP&S,7CP&S,1P&S,2P&S.Freshwatermaybedrawnfromtheforeandafterpeaktanks.
Cargotanks5CP&Sneedtobeinertedwithnitrogen.
Foroperationalreasons6&7CP&Saretobewashedbefore1&2P&S.
Thetankwashingcycleistoincludeatopwashof20minutesfollowedbyabottomwashof20minutesforeachtank.
TheP&Amanualstatesthatonlyamaximumof8washingmachinescanbeusedatonetimeinordertomaintainasuitablewashingpressure.
Washinglineistobepressuretestedto10barbeforewashingcommences.
Sincetherearenocargoresiduesonboard(thevesselhascomefromdrydock)tankwashingsarenotcoveredbyMARPOLandareconsideredcleanenoughtobedischargeddirectlyoverboard.
Nitrogeninertingof5CP&Sistobestartedduringthewaterwashingoftanksatasuitabletime.
Competence Criteria Competence DemonstrationExplainwhenthecargosystemneedstobe Qinertedtoreceivecargoes:
• atwhatstageofthecargocycle
• factorsdeterminingwhetherthesystem needsinerting
Explainthesignificanceofthequalityofnitrogen Qsuppliedtothecargosystem:
• requiredqualityintermsofnitrogenand oxygencontent
• requireddewpoint
Explainthefunctionofthenitrogengenerator: Q
• suggesttwofeaturesnitrogenhasthatprotect thecargo
Demonstratetheoperationofthenitrogengenerator: S
• openandstartrelevantcomponentsofnitrogen systemincorrectsequence
Demonstratethecorrectuseofanoxygenanalyser Stodetermineoxygenconcentrationatvariouspositionswithinthecargosystem:
• operateoxygenanalysercorrectlyandinterpret readingsincontext
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course4
Demonstratethecorrectmanagementoftankcleaning Qoperations:
• Identifywhichcargotanksrequirecleaningand establishappropriatecleaningandpreparation methods
Demonstrateanunderstandingoftankcleaning Qprocedures:
• recognisethevarioussourcesoftankcleaning instructions
• giveexamplesofalternativesources
Demonstratecontroloflinepressureindicatingan Sunderstandingoftheneedtoreducepressureinalinepriortoopeningvalves:
• setuplinesfortankwashing S
• bringpowerontowashinglinesystemcontrolling S valvesandlinepressureappropriately
• repeatlinepressurecontrolwhenchangingtanks S
Demonstratethecorrectsettingsforthetankwashing Scycles:
• consultoperatingmanualoralternativeappropriate adviceformachinesetting
Explainwhytankcleaningproceduresvarysomuchon Qchemicaltankers:
• whichfactorscausethevastarrayofoptions?
Describeroutinechecksoncargotankspreviously Qinerted:
• whyisitimportanttomonitortheatmospherein cargotankswhicharenotcurrentlybeingworked?
Keepanaccurateandcompletelogofrelevantevents. S
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 5
EXERCISE 2 Commencing Loading
Current StatusThevesselissecurelymooredportsidealongside.Theshipshorechecklisthasbeencompleted.
Thevesselwillbeloadingthefollowinggradesatthisfirstloadport:
1P&Sand2P&S SodiumHydrosulphideSolution45%
3CP&Sand4P&S Phenol
6CP&Sand7CP&S Proprionitrile
8CP&Sand9CP&S HexanoicAcid
10P&S DioctylPhthalate
Ofthesegrades,SodiumHydrosulphideSolution45%,Proprionitrile,andDioctlyPhthalatewillbestartedfirst.PhenolandHexanoicAcidwillbestartedapproximatelytwohoursaftertheloadingofthefirstthreegradesattheterminalrequest.
Bearinmindtheagreedmaximumloadingratesforeachtankinrelationtoitsventingcapabilities.
Priortostartingtheexerciseyouarerequiredtoproduceade-ballastingplantoaccommodatetheloadingofthesegrades.
Youshouldagreewiththeterminalthesamplingprocedurestobefollowedforeachgrade.
Competence Criteria Competence DemonstrationDemonstratethemethodsandproceduresnecessary Qtosafelyprepareandcommencealoadingoperation:
• testthevariousrequiredalarms,includinghigh S levelandoverflowalarmsandpumptrips
• testthecommunicationsystemsbetweenthe S relevantparties
• completetheship/shorechecklist S
• Withwhomshouldthischecklistbecompleted? Q
Determinewhichcargoes,ifany,willrequirevapourreturnlines:
• checkdatasheetsand/orcharterer/shipper S instructions
Explainhowtankswillbeverifiedashavingbeenpreparedadequatelyforloadingtocommence:
• Whatcantheship’sstaffconducttoindicatea Q tank’scleanliness?
• Whatcantheship’sstaffdoiftheseindications Q arenotappropriate?
• Whatwill‘independent’cargosurveyorsconduct Q forthesamepurpose?
• Ifthe‘independent’surveyordoesnotpassacargo Q tankforloading,whathappens?
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course6
Onceloadinghascommenced,whatadditionalcargo Qqualitycheckmaybeemployedbythecargosurveyor?
• Describethetypeofrateatwhichloadingshould Q commence
• Explainwhatshouldbetakenintoaccountwhen Q determiningthisinitialloadingrate.
• Explainwhatships’staffneedtoensureduringthis Q additionalcheck,ifnecessary.
Iftheaforementionedadditionalcheckisnotrequired, Sdescribeatwhichpointtheloadingratemaybeincreased.
Oncethisfinalverificationhasbeencompletedandloading Sresumes,demonstratehowtoestablishandmaintaintheagreedandappropriateloadingrate:
• Explainwheresuchdetailsforthistankerwouldbe Q recorded
Keepanaccurateandcompletelogofrelevantevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 7
EXERCISE 3 Multiple operations – continue loading, load into further tanks, de-ballasting
Current status:Thevesselhasalreadystartedtoloadthefollowingcargo;
1P&Sand2P&S SodiumHydrosulphideSolution45% 6CP&Sand7CP&S Proprionitrile 10P&S DioctylPhthalate
Thisexercisewillinvolvethecontinuedloadingoftheabovecargoesandthecommencementofthefollowing;
3CP&Sand4P&S Phenol 8CP7Sand9CP&S HexanoicAcid
ThePhenolparcelwillbeloadedintotanksconnectedtoavapourrecoverymanifold.
Youwillhavemadeade-ballastingplaninordertocounteractthestabilityimplicationsandstressesimposedbythemovementoftheseparcels.
Competence Criteria Competence DemonstrationThestudentshouldbefamiliarwiththemanagementofmultiplesimultaneousoperations.Thiswillincorporatemonitoringtanksatdifferentstagesofloadingandde-ballasting.
Commenceloadinginfurthertanksandbydemonstration:
• repeatpreparationandmonitoring S offurthertanksbeingloaded
• continuetomonitorallothercargotanks. S
• explainwhythisisnecessary. Q
• Explainwhatspecificallyrequiresmonitoringinother Q tanks.
• Explainwhatthecauseofanyanomalycouldbe. Q
• Explainexamplesofcausesofconcerninthiscontext. Q
• Explainhowyoucouldutilisetheresourcesatyour Q disposaltoassistwiththismonitoring.
• Explainunderwhichconditionsyouwouldyou Q allowfurthertankstobeloaded.
• Demonstrateunderwhichconditionsyouwould S commencede-ballastingoperations.
• Demonstratewhatelse,otherthancargoandballasttanks, S youwouldmonitorduringcargoandballasttransfer.
• Demonstratewithwhomwouldyourequirechannelsof S communicationduringsuchanactivity.
• Explainwhichlegislationgovernsatmosphericemissions Q fromtankers.
Keepanaccurateandcompletelogofrelevantevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course8
EXERCISE 4 Multiple operations – topping off, loading and de-ballasting.
Manageatoppingoffoperation,whilstcontinuingtoloadothertanksandde-ballast.
Current status:Thetankeriscurrentlyloadingfivedifferentparcelsinto18tanks.Threeoftheparcelsin10tanksareabouttobetoppedoff.Loadingofafurthertwocargoesinto8tankscontinues,withthePhenolparcelrequiringvapourrecovery.
De-ballastingwillalsocontinue.
Thefollowingtankswillbetoppedoffduringthisexercise;
1P&Sand2P&S SodiumHydrosulphideSolution45% 6CP&Sand7CP&S Proprionitrile 10P&S DioctylPhthalate
Loadingwillcontinueinto;
3CP&Sand4P&S Phenol 8CP7Sand9CP&S HexanoicAcid
Competence Criteria Competence DemonstrationTopoffrelevantcargotankswhilstcontinuingtoloadothertanksandcontinuingtode-ballast:
• Demonstratehowyouwillpreparetoconductthese S operationssimultaneously.
• Explainwhatspecificprecautionsyouwilltakewith Q regardtotoppingoff.
• Explainwhatadditionalchecksyouwillyoumake Q specificallypriortotoppingoff.
• Explainthebenefitsofestablishingalogical Q sequenceoftankstobetoppedoff.
• Explainthesignificanceofcontrollingthelistand Q trimatthisstage.
• Demonstratethecontrollingloadingratesprior S toandduringthetoppingoffprocedure.
• Explainthedangerassociatedwithclosingatank Q valveagainsttheflowofoilfromashore.
• Explaintherespectivebenefitsanddisadvantages Q ofa‘shipstop’anda‘shorestop’.
• Explainhowcargowillbeclearedfromtheshore Q lineuponcompletionoftoppingoff.
• Describehazardscommonlyassociatedwithline Q clearing.
• Howcantheseproblemsbeavoided. Q
Keepanaccurateandcompletelogofrelevantevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 9
EXERCISE 5 Loaded voyage – agitation and tank preparation
Current Status:Thevesselisatsea,partiallyloaded.ThePhenolcargorequiresre-circulatingand,priortoarrivalatthenextport,thetankspreparedtoreceiveIsophoroneDiisocyanateneedtheiratmosphereschecking.
Theshipwillbeatseaonaloadedpassagewiththepowerononlyforcargomonitoringsystems.Powerforoperatingcargopumpsandvalveswillneedtoberequestedandestablished.
Competence Criteria Competence DemonstrationExplainanddemonstratetherequirementandmethodof‘agitating’acargo:
• Explainwhoismostlikelytoissueinstructionon Q agitation.
• Explainthepurposeofagitatingorre-circulatinga Q cargoonaloadedpassage.
• Demonstratethatpowerisavailabletoworkthe S cargopumpsontherequiredtanks.
• Demonstrateselectionofthetankswhosecargo S requirere-circulation.
• Demonstratewhichvalvesandlinestosetin S ordertore-circulatethePhenolparcel.
• Demonstrateroutinemaintenancechecksthatare S carriedoutoncargopumpsbeforeandafteruse.
• Explainwhatactionsshouldbetakenintheevent Q ofaleakofPhenolontothedeckduringthe re-circulationofcargo.
Demonstratetheprinciplesofhydraulicpumpoperation;
• Demonstratecorrectpumpstartingprocedure. S
• Demonstratesafepumpingpractice. S
• Demonstrateanadequatemonitoringoftanksand ensurenocargovapourescapesintotheatmosphere otherthanthroughthedesignedventingarrangements.
• Demonstratethedecklinestobedrainedbackinto S thecargotanks.
• Uponcompletionofthistaskre-checkbydemonstration S thattheatmospherein5CP&Sissuitableforthe loadingofIsophoroneDiisocyanate.
• Explainwhythetankatmosphereinthetankscarrying Q IsophoroneDiisocyanaterequiresmonitoring.
• Explainwheresafetyinformation,regardingthesecargoes Q wouldbeavailable.
Keepanaccurateandcompletelogofrelevantevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course10
EXERCISE 6Commence simultaneous load and discharge
Current Status:Thevesselisallfastalongside,portsidealongsideawaitingtheoutcomeofthetankinspectionandpre-cargomeeting.Duetoterminalrequirementsthedischargingofallfourgradesistobecommencedbeforeanyloadingisstarted.Youarerequiredtoplantheorderinwhichthegradesaredischarged.Allgradesaretobecompletelydischarged.
Thedischargeofthefollowingparcelsisplannedforthisport:
DioctylPhthalate from 10P&S SodiumHydrosulphideSolution45% from 1&2P&S Phenol from 3CP&S,4CP&S HexanoicAcid from 8CP&S,9CP&S
Oncedischargeoftheabovegradesisunderwayyoumustcommencetheloadingofthefollowingthreegrades.
Loadingofthefollowingcargoesisplanned:
Propylbenzene into 3P&S,4P&S,5P&S DiethyleneGlycol into 6P,7P,8Pand9P Cyclohexanol into 6S,7S,8Sand9S
AparcelofIsophoroneDiisocyanateisalsotobeloadedatthisport.Howeverduetoproblemswithintheterminaltheloadingofthisparcelisnottostartuntiltheloadingoftheother3gradeshasbeencompleted.
IsophoroneDiisocyanate into 5CPand5CS
ThetanksloadingPropylbenzeneandIsophoroneDiisocyanatewillrequireavapourreturnline.De-ballastingwillneedtobeplannedinlinewithloading/discharge.
Competence Criteria Competence DemonstrationDemonstratemanagementofmultipleconcurrentoperationsincludingloading,dischargingandde-ballasting.
• Demonstratethatcargoplanhasbeenfollowed. S
• Demonstratecompletionofthestandardchecklists S priortocommencingcargooperations.
• Explainwhichtanksrequireaninspectionandwhich Q donot.
• Explainwhichtanksrequireawallwashtest. Q
• Describetheentryrequirementsintothetankstobe Q inspected.
• DemonstrateeffectivecommunicationwiththeJetty S Operator,deckwatchandanyotherrelevantparties.
• DescribetheoperationofFramopumps Q
• DemonstratethecorrectwaytostartaFramopump S
• Demonstratethecorrectwaytostartdischargefrom S atank.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 11
• Describethecheckstobemadeatthestartof Q dischargingatank.
• Describethedangerofoverflowingtanksconnected Q tothesamelinewhenstartingtodischarge.
• Explainwhereinformationandadviceregardingtank Q preparationislikelytocomefrom.
• Describewheretheminimumsafetycriteriaforthe Q carriageofthiscargoarelisted.
• Explainwhatspecificcarryingconditionsaregenerally Q requiredforthesecargoes.
• Explainwhatformsofcontaminationthetankinspections Q wouldbeinvestigating.
• Describewhatproceduresshouldbeadoptedatthestart S ofdischargetominimisethepossibilityofpressure surgesinthelines.
• Explainwhyisitimportanttoincorporateflexibilityinto Q thecargoplan.
• ExplainwhytheDiethyleneGlycoltanksmightnotbe Q loadedto98%full.
• Explainwhatfactorsmayimpactonthemanifold Q back-pressuresindicated.
• Describewhatfactorscouldaffecttheoverallefficiency Q oftheoperation.
• Explain,otherthanforsafety,whyefficientperformance Q isimportant.
• Explainwhichparcelwillrequireitstankspre-washing Q assoonasithasbeendischarged.
• Demonstratehow,oncecargooperationsareunderway, S ballastcanbeworkedtotheadvantageofthecargo operations.
Keepanaccuratelogofevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course12
EXERCISE 7 Pre-wash 10 p and 10 s upon completion of discharge of the DIOCTYL PHTHALATE
Current Status:Concurrentlywithbothloadinganddischarge,thepre-washof10PandSmustbeundertaken.
Loadingcontinues;
Propylbenzene into 3P&S,4P&S,5P&S DiethyleneGlycol into 6P,7P,8Pand9P Cyclohexanol into 6S,7S,8Sand9S
Dischargeisalsobeingundertaken;
SodiumHydrosulphideSolution45% from 1P&S,2P&S Phenol from 3CP&S,4CP&S HexanoicAcid from 8CP&S,9CP&S
Competence Criteria Competence DemonstrationUnderstandtherequirementofandperformapre-washofthetanksfromwhichDioctylPhthalatehasjustbeendischarged.
Understandthebenefitofplanningahead,inorderto Smakebestuseofthetimeavailable,thebestuseofresourcesandthebenefitofsequencing.
• Whichsourcesofinformationneedtobeconsulted, Q whenplanningthispre-wash.
• Identifythecorrectwashingmedium Q
• Completeapre-washingchecklist S
Demonstratemanagementofloading,discharging,tankwashingandballastingsimultaneously.
• Explainwhichpublicationneedsconsultation,giving Q thetechnicalrequirementsofthepre-wash.
• Describethevariouspre-washrequirementsand Q procedures.
• Explainwhichindividualisrequiredtowitnessthe Q pre-wash,asindicatedabove.
• Explainwhatthealternativeoptionsare,ifsuchan Q officialisnotavailable.
• Explain,otherthanfollowingtheproceduresdetailed Q inthepublicationidentifiedabove,whichothersource ofinformationwillindicatetheconcentrationofcargo residueinthewashingsbeingstrippedashore.
• Explainwhichcheckwillconfirmthattheresiduesofthe Q pre-washbeingpumpedashoreindicatethatthetanks areclean.
• Explainwherethedetailsofthispre-washwillbe Q recorded.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 13
• Explainwhatwillberequiredonthetankwashingsystem, S oncewashinghasbeencompleted.
• Demonstratethepre-planningthatisrequiredtoenable S thepre-washtobestartedwithoutjeopardisingother concurrentoperations.
• Demonstratehowtheapparenttrimdifficultiesarising S fromwiththeneedtocompletedischargeofDioctyl Phthalatefromtheaftcargotanksfirstcanbeovercome.
• Demonstratewheretheverificationofthepre-washwill S berecordedandhowitwillbeverified.
• Explainhowyouwillknowifthetankwashingmachines Q arefunctioning.
• Explainwhyitissonecessarytostripthetanksdry. Q
• Describewhichsourcesofinformationcanbe Q consultedforinformationregardingstrippinglimits.
• Describethepracticalimplicationsassociatedwiththe Q poordrainingofthecargosystem.
• Describethecommercialimplicationsassociatedwith Q thepoordrainingofthecargosystem.
• Explainhowthepumpisstrippedofcargo. Q
• Describehowthepumpcanbecontrolledintheevent Q ofafailureofthecontrolsystemincargocontrolroom.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course14
EXERCISE 8 Complete the discharge, stripping the requisite tanks
Current StatusDischargingandloadingcontinue.Twelvecargotanksarenearingtheendofdischargeandwillneedtobedrainedandstripped.Thecargopumpswillalsoneedtobestrippedoncompletion.
Ballastiscurrentlybeingtakenonboard.
Donotneglectotheroperationssuchastheloadingofcargoelsewhere.Itwillbeimportanttomaintaineffectivecommunicationswiththedeckwatchandwiththeterminal,toensurethatcargoisbeingstrippedashoreasintended.
Youwillberequiredtoproduceaplanforthispartoftheoperation.
Competence Criteria Competence DemonstrationControlthepumpsduringdrainingofthetanksandcompletestrippingoftankspumpsandlines.
Demonstratepumpcontrolduringthedrainingoftanks:
• Demonstratethestrippingofcargotanksandpumps S usingtheappropriatestrippingmethods.
• Demonstratemanagementofresourcesand S communicationstoexpeditethecompletionofdischarge.
• Demonstratemonitoringofallthetanksbeingloaded S anddischarged.
• Demonstratecontrolofthevessel’strimtoprovide S adequatetankdraining.
• Demonstratekeepingtheterminalinformedofthe S progressofthedischarge.
• Demonstratethecompletionofthedocumented S proceduresinordertosatisfybothregulatoryand commercialrequirements.
• Statewhetheranyofthesethreeparcelsrequireapre-wash. Q
• Explainwhichsourceofinformationwillindicatewhich Q parcelsrequirethis.
• Explainwhatshouldhappentothepumpdirectlyafter Q strippingiscompleted.
• Explainwhypurgingthepumpcofferdamissoimportant Q withthistypeofpump.
• Describewhatpurgingrecordsshouldbekept. Q
• Explainhowchangingthesequenceofstrippingcan Q beanadvantage.
• Describeinwhatwaystheoperation Q couldhavebeenbetterplanned.
KeepanaccuraterecordofeventsandensuretheNLScargorecordbookhasbeenupdated.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 15
EXERCISE 9 Tank washing, ventilation and cargo cooling while at sea.
Current StatusThevesselisatseasailingataround16knots,approximately7milesfromthenearestland.Thecargoordersforthenextloadinghavebeenreceivedanditcanbetakenthatthestandardofwashingrequiredis‘waterwhite’.Thenextcargoeswillbelowspecificationandnon-aggressive.
ThetanksthatcontainedHexanoicAcidaretobewashed.
ThetankswhichcontainedPhenolaretobecleaned.
TheIsophoroneDiisocyanatecargotemperaturehasbeenallowedtorisetoabout17°C,whichisisneartotheupperacceptabletemperaturelimit.Thecoolingsystemistoberuntopreventanyfurtherriseintemperatureandtocoolthecargobyafewdegreesoverthenext48hours.
Competence Criteria Competence DemonstrationVentilatetanks3CP&S,4CP&S,whichpreviouslycontainedPhenol,inordertocoolthecargoofIsophoroneDiisocyanate
• Explaintheappropriatetankcleaningprocedures Q relatedtothenatureofthecargoresidueremaining.
• Explainwhichcargotanksmaybecleanedby Q ventilationalone.
• ExplainwhichoperationsneedrecordingintheNLS Q CargoRecordBook.
• Describewhichpublicationstoconsultinorderto Q planthewashingprogramme.
Demonstrateanunderstandingofwhichfactorswillinfluencethewashingprogramme:
• Explainwhatmightinfluencetheefficiencyof Q thetankwashing,cleaningandpreparationoperation.
DemonstrateanunderstandingoftherecommendedproceduresformaintainingthetemperatureandqualityoftheIsophoroneDiisocyanatecargoparcel:
• Explainhowtheefficiencyoftemperaturecontrol Q beassessed.
• Demonstratethecorrectwaytostartthecooling S system.
• Demonstratethere-circulationofcargothrougha S heatexchangerinordertocoolacargo.
• Demonstratehowtocontroltheflowratesand S pressuresinaheatexchangerinordertominimise thepossibilityofcargocontaminationintheeventof aleakwithintheheatexchanger.
• Explainwhichtanksaretobewashed. Q
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course16
• Explainwhatsortofwashingmediumshouldbe Q used.
• Demonstratethewashingcyclethatshouldbe S utilised.
• Explainhowthetankwashingsaredealtwith. S (vesselisonly7milesfromthenearestland).
• Demonstratewhichtankscanbeusedas S sloptanks.
• DemonstratehowthePhenoltankscanbe S cleaned.
• Describewhatoptionsthereareforventilating Q thesetanks(topbottom,bloworextract).
• Explainwhatistheidealcarriagetemperature Q isfortheIsophoroneDiisocyanate.
• Explainwhatoptionsarelikelytobeavailablefor coolingonthisshipiftheIsophoroneDiisocyanate cargoisalittleabovetheidealtemperature.
• Explainifthefreshwatercooleror Q thermaloilcoolershouldbeused.
• Explainwhatchecksshouldbemade Q whencoolingthecargointhisway.
• Statewhetherthepressureofthe,coolantin theheatexchangershouldbehigherorlower thanthepressureofthecargo.
• Explainhowthepressuresintheheatexchanger Q shouldbecontrolledinordertoreducethepossibility ofcargocontaminationifthereisaleakwithinthe heatexchanger.
• Explainwhichchecksshouldbemadeonthe S atmosphereintheIsophoroneDiisocyanatetanks.
• ExplainhowtheatmosphereintheIsophorone Q Diisocyanatetankscanbemaintained.
• Describewhichrecordsshouldbekept Q duringtheseoperations.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 17
EXERCISE 10 Decant permissible tank washings at sea
Current StatusThevesselisatsea,outsideofaspecialarea,underwayataspeedinexcessof16knotsandinwaterofabout75metresdepth.Thenearestlandisabout17.5milesaway.
Slopsarecontainedin10P&ScargotanksandaretheresiduesofthetankwashingpreviouslycarriedoutinthecargotanksthatcontainedHexanoicAcid.
Competence Criteria Competence Demonstration
• Explainwhichslopsmayandwhichmaynotbe Q dischargedatsea.
• Describetheareaswhereslopsmayormaynot Q bedischarged.
• Explainhowthedischargeofslopsiskeptwithin Q theparameterssetoutinMARPOLAnnexII.
• ExplainhowthedetailsoftheP&Amanualare Q followedinordertocomplywiththeprovisionsof MARPOL.
Setupthedeckfordischargeoftheslops,throughtheappropriatepipingarrangements:
• Describethepreparationofaslopdisposalplan. S
• Demonstratethemanagementofaslopdisposal S plan.
• Setupthedecklinesfordischargeofthe S appropriateslops,throughtheover-boarddischarge facility,intothesea.
• Statewhethertheresiduesofthecargoesmay Q bemixedinthesamesloptank.
• Explainwhichchecksshouldbemadeonthe Q statusoftheothercargotanksduringthisoperation.
Maintainanaccurateanddetailedlogofevents.
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course18
APPENDIX I
CARGO STOWAGE PLAN AFTER FIRST LOAD PORT
DioctylPhthalate
HexanoicAcid
Proprionitrile
Phenol
SodiumHydrosulphideSolution40%
INTERTANKO (TOTS) — 4B Chemical Tanker Simulator Verification Course 19
APPENDIX II
CARGO STOWAGE PLAN AFTER SECOND LOAD / FIRST DISCHARGE
DiethyleneGlycol
Proprionitrile
IsophoroneDiisocyanate
Cyclohexanol
Propylbenzene
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