DCLL TBM Reference Design Setting up parameters for the Costing Exercise and

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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