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DCLL TBM Reference DesignDCLL TBM Reference Design
Setting up parameters for the Costing Exercise and Setting up parameters for the Costing Exercise and For the Preliminary Design PhaseFor the Preliminary Design Phase
• New TBM geometryNew TBM geometry• Reference design and parametersReference design and parameters• Design temperaturesDesign temperatures• Ancillary equipmentAncillary equipment
Presented by C. Wong for the TBM teamPresented by C. Wong for the TBM team
TBM conference call, August 31, 2005TBM conference call, August 31, 2005
Mission: Mission: Design, fabricate and commission the first DCLL blanket to be tested Design, fabricate and commission the first DCLL blanket to be tested in ITER on day-one, to support the DCLL module testing goals during in ITER on day-one, to support the DCLL module testing goals during the HH phase of ITER and to prepare the module design and ancillary the HH phase of ITER and to prepare the module design and ancillary
equipment for subsequent modules and corresponding testsequipment for subsequent modules and corresponding tests..
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1660
484
413
Recent change in framethickness to 20 cm changed the dimensions and powergeneration of the DCLL TBM.
DCLL Design approach and Configuration remain the same.
Flat surface Flat surface will be usedwill be used
New frame thickness at 20 cmNew frame thickness at 20 cm
New moduleNew moduledimensions in mmdimensions in mm
Test port frameTest port frameCross-sectionCross-section
TBMTBM
Dog legDog leg
Port framePort frame
ShieldShield
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US DCLL TBM module
SS frame
Front
Back
2mm Be front face
FS structure
FCI is the Thermal and MHD Insulator lining all PbLi channels
He out
He in
PbLi inPbLi out
All FS structures are He-cooled @ 8 MPa
PbLi self-cooled flows in poloidal direction
PbLi inPbLi out
FW He counter flow
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DCLL Design
Module Materials:
Structural material: Ferritic Steel, e.g. F82H
Breeding material: Pb-17Li
FW/structural coolant: 8 MPa helium
Secondary coolant: 8 MPa helium
Flow channel insert: SiC/SiC composite or metallic sandwich
FW coating: Be, mm 2
Module Geometry:
Port Frame front thickness, cm / “Dog leg” width, cm 20 / 3
Frame and TBM gap width, cm 2.0
TBM height, m 1.66
TBM width, m 0.484
Frontal area, m2 0.803
First wall shape flat
Radial depth, m 0.413
ITER Neutron and surface loading:
Neutron wall loading, MW/m2 0.78
Average surface loading, MW/m2 0.3
Max. surface loading, MW/m2 during transient for 10 s 0.5
Blanket energy multiplication 1.006
Tritium breeding ratio 0.741
Tritium production rate during pulse, #/s 2.054x1017
DCLLDCLLDesignDesignParametersParameters
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Thermal parameters:
Module thermal power, MW 0.872
He thermal power, MW 0.472
He Tin/Tout, C/C 360/440
He system pressure, MPa 8
He mass flow rate, kg/s 1.135
He volume flow rate, m3/s 0.201
He power fraction 0.541
PbLi thermal power, MW 0.4
PbLi pressure, MPa 2
TBM PbLi Tin/Tout, C/C 360/470
PbLi mass flow rate, kg/s 19.26
PbLi volume flow rate, m3/s 2.066x10-3
Ancillary equipment parameters:
FW/FS loop He thermal power to TCWS, MW 0.472
Secondary He to TCWS from the PbLi loop, MW(This system is designed to full module (100%) power)
0.872
PbLi mass flow rate, kg/s @ Tin/Tout=360/470 C 42 kg/s
PbLi volume flow rate, m3/s 4.35x10-3
DCLLDCLLParametersParametersCon’tCon’t
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DCLL TBM Bypass Loop Schematic
DCLLTBM
PbLi mixingtank
Pump
Valveoff bypass
line
8 MPaHeliumloop
PbLi loop
360 C
470 C
470 C
360 C
19.26 kg/s
19.26 kg/s
0 kg/s
0.4 MW
Tritium extraction tank
PbLi/HeHeat Exchanger
180 C
300 C
Concentricpipe with FCI
Higher PbLi exit temperature can be achieved without requiring high-temperature materials for external piping/HX/TX. This can be achieved by turning the bypass valve “on” to allow mixing a lower temperature stream with the high-temperature stream in the PbLi mixing Tank
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DCLL Design Temperatures
Reference TBM operation limits Higher performance operation limits
FS Tmax ≤ 550° C ≤ 550° C FS/PbLi < 500° C < 500° C SiC/PbLi < 500° C < 700° C SiC Tmax < 500° C < 700° C
Coolant temperature range:
360° C < He < 440° C 360° C < He < 440° C 360° C < PbLi ≤ 470° C 450° C < PbLi ≤ 650° C
For the DCLL TBM higher PbLi exit temperature ~650° C can be achieved via the bypass loop without requiring high-temperature materials for external piping/HX/TX.
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Pb-Li Primary Coolant Loop
Transporter Area
Secondary He Coolant Loop
TCWS
Test PortPrimary He
Coolant LoopTCWS
DCLL He and PbLi Circuits Corresponding to Ancillary Equipment DCLL He and PbLi Circuits Corresponding to Ancillary Equipment
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He Pb-17Li
Average neutron wall loading, MW/m2
0.78
Average surface heat flux, MW/m2 0.3
Blanket M 1.006
Thermal power, MW 0.472 0.872
Fraction of blanket power, % 54 100(a)
Tin/Tout, oC 360/440 340/440
Coolant pressure, MPa 8 2
Mass flow rate, kg/s 1.14 46
Volume flow rate, m3/s 0.222 4.97x10-3
Tritium breeding ratio 0.741
(a)This allows the possibility of testing a complete liquid metal self-cooled blanket option
DCLL Ancillary Circuits Design ParametersDCLL Ancillary Circuits Design ParametersAim for testing flexibilityAim for testing flexibility
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PbLi loopPbLi loopfrom TBM tofrom TBM totransportertransporter
Primary He andPrimary He andSecondary He Secondary He Ancillary equipment at TCWSAncillary equipment at TCWS@~70 m away from the TBM@~70 m away from the TBM
Helium and PbLi equipment and dimensions have been scopedHelium and PbLi equipment and dimensions have been scopedand ready for preliminary costing exerciseand ready for preliminary costing exercise