1. DCLL TBM Design Status FNST Meeting, August 12-14, 2008, UCLA
Mo Dagher1 and Edward Marriott2
With Input from
Clement Wong3, Siegfried Malang4 and Mohamed Sawan2
And the US DCLL Team
1University of California – Los Angeles
2UW – Madison, Fusion Technology Institute
3General Atomics, 4Consultant

2. The DCLL TBM has undergone a major design change since the last time a design review was held.
Changes focused on an optimized He flow circuit through the Grid Plates as well as changing the PbLi flow scheme.
Work is ongoing to complete the back plate design, He Plenum design and overall TBM design optimization based on input from thermal and structural analysis.
System integration design update for TBM interface with Frame assembly, Port extension and AEU

3. Equatorial Port Plug Assembly
DCLL TBM
Equatorial Port Plug Frame Assembly
DCLL TBM Assembly
Shielding*
Vacuum Boundary Back Plate*
* Shielding and Pipe penetrations shown in this view are not representative of the final design. Additional design work is under way to complete this assembly.

4. Design Change Highlight
DCLL TBM Design
Design Change Highlight
Original Design Concept
Reversed PbLi Flow
Starting at the top
PbLi Inlet in back Channel with Downward flow
PbLi Outlet flow in Front channel Upward Flow
Replaced PbLi concentric pipe concept with two individual I/O Pipes
He Flow in FW is Un-Changed, 2 circuits, 7 passes per circuit
He Flow in Grid Plate is Modularized.
He Flow in Grid plate in radial direction
Multi-layered back plate design Configuration.
Current Design Concept

5. PbLi Flow Scheme 5) LL flow exits TBM 1) LL Flow Enters TBM
2) LL flow splits into Three Channels and flows down inner chamber
4) LL flow Collected in the Upper Manifold
3) LL flow turns around and flows up outer chamber

6. He Flow through First Wall
Flow through top plate
He Flow through First Wall
Step 2: Helium splits to the First Wall flow circuits.
Helium splits to the First Wall flow circuits.
Helium counter-flows through six First Wall passes and Bottom Plate.
Step 3: Helium counter-flows through six First Wall passes and Bottom Plate.
Helium flows into seventh pass, top plate, and Pb-Li horizontal plate.
Flow through First Wall

7. He Flow through Grid Plate and Divider plates
He Inlet Channels
He outlet Channels

8. TBM Assembly, General Configuration
PbLi Outlet Pipe
PbLi Inlet Pipe
Shear keys
He Outlet Pipe
Electric Strap
He Inlet Pipe
Flexible Support Points
PbLi Drain Pipe

9. TBM Assembly Exploded View
Major Components

10. DCLL TBM Assembly Mid Plane Section
PbLi Outlet Channels (3)
Inner He Distribution Manifold (Circuit 1)
PbLi Inlet Channels (3)
Divider Plate Plenum
Outer He Distribution Manifold (Circuit 2)
First Wall
Grid Plates
Grid Plate He Outlet Plenum
Inner He Dist. Manifold (Circuit 2)
He Outlet Plenum
Grid He Inlet Plenum
Outer He Distribution Manifold (Circuit 1)
Back Plate

11. Mid Plane Section View

12. Vertical Section View Thru PbLi Channels

13. Vertical Section Through Grid Plates

14. Radial Build Layer Positions
Seven Layers were used (Layer Thickness shown in parentheses):
Top Plate (28mm)
PbLi Outlet (100mm)
Horizontal Grid Plate (20mm)
PbLi Inlet (120mm)
Midplane (1275mm)
Bottom Zone (93mm)
Bottom Plate (24mm)
Layer 2
Layer 3
Layer 4
Layer 5
Layer 6
Layer 7

15. Layer 5 – Midplane (1275mm), Material Composition

16. Layer 5 – Midplane (1275mm), Power Density Dist.

17. Current and Future Activities
Analysis
He Flow analysis. He Flow through First wall, Grid Plates, Pressure Drop and flow distribution.
Disruption loads. To provide loading and stress information in order to design the TBM attachment system to the Frame and shielding.
Stress analysis of the various components and assemblies for further design optimization.
TBM design iteration based on input from thermal and structural analysis.
System integration.
Complete back Shield design based on input from neutronics analysis including TBM attachment, pipe penetrations and Vacuum Boundary pipe pass through.
Pipe Forest configuration and design through equatorial port into the AEU
Update AEU interface design.
Fabrication and Assembly. Evaluate fabrication and assembly process for various TBM components