1. 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

2. 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

3. US DCLL TBM module SS frame FCI is the Thermal and MHD
All FS structures are 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

4. 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

5. 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, Tin/Tout=360/470 C
42 kg/s
4.35x10-3
DCLL
Parameters
Con’t

6. 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

7. 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 ° C < He < 440° C
360° C < PbLi ≤ 470° C ° 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.

8. 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

9. DCLL Ancillary Circuits Design Parameters Aim for testing flexibilityHe
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

10. 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