DCLL TBM Reference Design Setting up parameters for the Costing Exercise and For the Preliminary Design Phase Mission: Design, fabricate and commission the first DCLL blanket to be tested 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 equipment for subsequent modules and corresponding tests. New TBM geometry Reference design and parameters Design temperatures Ancillary equipment Presented by C. Wong for the TBM team TBM conference call, August 31, 2005

New frame thickness at 20 cm Port frame Recent change in frame thickness to 20 cm changed the dimensions and power generation of the DCLL TBM. DCLL Design approach and Configuration remain the same. New module dimensions in mm 413 New frame thickness at 20 cm TBM Shield 1660 Dog leg Test port frame Cross-section 484 Flat surface will be used

US DCLL TBM module SS frame FCI is the Thermal and MHD All FS structures are He-cooled @ 8 MPa PbLi self-cooled flows in poloidal direction SS frame Front FCI is the Thermal and MHD Insulator lining all PbLi channels FS structure PbLi in PbLi out He in Back He out PbLi in FW He counter flow PbLi out 2mm Be front face

DCLL Design Parameters 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 DCLL Design Parameters

DCLL Parameters Con’t 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 Secondary He to TCWS from the PbLi loop, MW (This system is designed to full module (100%) power) PbLi mass flow rate, kg/s @ Tin/Tout=360/470 C 42 kg/s 4.35x10-3 DCLL Parameters Con’t

DCLL TBM Bypass Loop Schematic Pump 360 C Tritium extraction tank Valve off 19.26 kg/s bypass line 180 C DCLL TBM 360 C 0 kg/s PbLi loop 8 MPa Helium loop PbLi/He Heat Exchanger Concentric pipe with FCI 470 C PbLi mixing tank 470 C 19.26 kg/s 0.4 MW 300 C 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

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.

DCLL He and PbLi Circuits Corresponding to Ancillary Equipment Pb-Li Primary Coolant Loop Transporter Area Secondary He Coolant Loop TCWS Test Port Primary He Coolant Loop

DCLL Ancillary Circuits Design Parameters Aim for testing flexibility 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

Helium and PbLi equipment and dimensions have been scoped and ready for preliminary costing exercise PbLi loop from TBM to transporter Primary He and Secondary He Ancillary equipment at TCWS @~70 m away from the TBM