cocate safety assessment pipeline export...
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COCATE Safety Assessment Pipeline Export SystemCOCATE WP 3: Safety Global Capture to Storage Transport Network
Menso Molag and Mark Spruijt
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Menso Molag and Mark SpruijtCOCATE Safety Management
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Safety Assessment Pipeline Export System
Background WP3
Cocate WP3 Tasks, deliverables, partners
Release models high pressure CO2 pipelines
Dispersion released CO2
Vulnerability models
Further activitiesFurther activities
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QRA of CO2 pipeline Rotterdam - Amsterdam
Diameter: 0.65 mLength : 83 kmP 10 22 bPressure: 10 -22 bar
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Risk assessments CO2 pipeline
Failure cases: 20 mm hole and full bore rupture
Pipeline owner [2004] : 10-6 lethality distance 3.5 m from pipeline
Hoofddorp assessment [2005]: 1% lethality distance 200 m
TNO [2008] : lethality risk < 10-6 per year, 1% lethality distance 60 m
International comparison (Koornneef [2010]): 10-6 lethality distance : 0 – 200 mSafety distance : 0 – 7.2 kmSafety distance : 0 7.2 km
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Uncertainties QRA CO2 pipelinesKoornneef [2010]
Influence on risk
Failure scenario ++Failure scenario ++
Release frequency +
Vertical / horizontal Jet +++
Gas release or gas/solid release ++
Crater formation + loss of momentum ++
Meteorological conditions +Meteorological conditions +
Terrain altitude (obstacles, slopes/hills) ++
Human vulnerability model +++
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Cocate WP3: Objectives, tasks, partners
Objective: Define, quantify and analyse HSE risks of CO2 collecting network andtransport chain
Tasks:1. Development of safety management toolkit (DNV, IFP, TNO)p y g ( )2. Risk assessment collecting network (DNV)3. Risk assessment transport systems (TNO, DNV)4. Risk assessment integrated chains (TNO, DNV)
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TNO researchSmall scale release experimentspModelling of the 2 phase outflow and rain-out of solid CO2Dispersion of dense CO2Vulnerability of CO2
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CATO 2 programme:Small scale high pressure CO2 release experiments
TNO micro scale tests:• Release from 1 litre vessel• Nozzle opening : ¼ and ½ inch• Pressure : 60, 80, 100, 120, 150 180 bar
Objectives• Rapid study of phenomenap y p• Valve selection• Feasibility of Measuring techniques• IR (turbulence), high speed camera (particle size)
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CATO2 experiments: Kema Research/TNO
500 litre high pressure vesselNozzle length : 100 mmNozzle diameter : 1/8 inch, ¼ inch, ½ inchInitial CO2 pressure : 80 120 150 barInitial CO2 pressure : 80, 120, 150 bar
MeasurementsVessel : pressure, temperature, heat flux, liquid levelJet : CO2 concentration, T, velocity,
s/l/g mass fraction, air entrainment, condensation/freezing water
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Graag foto opstelling toevoegen
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Graag foto opstelling toevoegen
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New solid CO2 formation model
Developed within TNO [1] as part of the Effects soft ware
Used within COCATE to get an idea of differences between severalUsed within COCATE to get an idea of differences between several codes/methods
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CO2 solid formation
1. mechanical break up
2. flashing
3. evaporation and freezing
The result for CO2 is a solid particle diameter distribution
[1] “Assessment of particle size distribution in CO2 accidental releases” C E C Hulsbosch-Dam M P N[1] Assessment of particle size distribution in CO2 accidental releases , C.E.C. Hulsbosch Dam, M.P.N.
Spruijt, A. Necci, V. Cozzani, Journal of Loss Prevention in the Process Industries 25 (2011) 254-262
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CFD:CO2 Dispersion of hypothetical worst case scenario pipeline rupture Le Havre -Rotterdam
Worst-case CO2 release scenario:
Massflow 1400 kg/s gaseous CO2“Zero”-momentum release (circularZero -momentum release (circular
release d=100m)Hilly terrain, distance to “village” 1 5km1.5km,
altitude difference 50mdomain dimension 2x2km
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COCATE: Heavy gas continuous release in hilly terrain Wind 1.5m/s: Surface CO2 molar fractions
Massflow: 1400kg/s CO2
CO2 contours for weather conditions without wind and 1.5m/s windspeed:No wind: Up to 11% at lowest domain boundaries1.5m/s wind: 1% molar fractions at downwind domain boundaries
No wind: Surface CO2 molar fractionsNo wind: Surface CO2 molar fractions
release point)
Terrain topology (altitude)
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Vertical distance [m] of 10 vol.% and 1 vol.% CO2 above ground level
10 vol %10 vol %
Maximum 10m at depressions Up to 5m at downwind
No wind Wind 1.5m/s
p ppositions
1 vol %
Terrain topology (altitude) Surface CO2 molar fractions
Up to 20m in front of local hills Up to 20m in front of local hillsat downwind positions
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Vulnerability of CO2 inhalation
TNO (inert gas), 2006 : Pr = -63.3 + ln (C5.2 . t) (C mg/m3, t min)
HSE (CO2) , RR749, 2009: Pr = -90.8 + 1.01 ln (C8 . t) (C ppm, t min)
E 1% letality 50% letalityExposure 1% letality[vol. % CO2]
50% letality[vol. % CO2]
[min] HSE TNO HSE TNO
1 11 18 15 28
10 8 11 11 1810 8 11 11 18
30 7 9 9 15
60 6 8 8 13
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Further activities
DNV: Bayesan Network Modelling + risk assessment framework
TNO finalize release modelling and consequence models
DNV: Risk assessment of collecting network + ship transport
TNO: risk assessment pipeline Le Havre – Rotterdam
DNV/TNO; Risk assessment CCS chain
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