1. ARIES-CS Power Core Configuration Presented by X.R. Wang Contributors: Laila A. Ei-Guebaly, S. Malang, T.K. Mau, Richard Peiperty, A.R. Raffray and L. Waganer ARIES Meeting PPPL, NJ Oct 4-5, 2006

2. More design details have been added to the power core configuration  Openings/Penetrations through VV and coil structure  Diverter plates, diverter pumping ducts and diverter shield  Diverter access pipes and possible maintenance scheme  Vacuum pumping and local shield  ECH/Auxiliary maintenance ports  PF coils, cryostat, supporting truss and building

3. Major openings through vacuum vessel and coil supporting tube Number of the openings Opening in the vacuum vesselOpening in the coil structure tube (VV wall ~0.1 m; insulation ~0.1 m) Maintenance port 31.8 m (tor.) x 4.0 m (pol.)2.2 m (tor.) x 4.4 m (pol.) ECH/Auxiliary port 31.24 m (tor.) x 1.54 m (pol.) (waveguide: 0.24 m x 0.54 m) 1.92 m (tor.) x 1.94 m (pol.) Diverter access pipe 24D=0.6 mD=0.8 m Vacuum pumping duct 121.0 m (tor.) x 1.25 m (pol.)1.4 m (tor.) x 1.65 m (pol.) He/PbLi pipe connecting to HXs 6+6D=0.74 mD=0.94 m Hot supporting leg 9D=1.0 mD=1.2 m Cold supporting leg 9D=0.75 mD=0.95 m

4. Where to make the openings?  Maintenance ports: at 0, 120, 240 degree  Vacuum pumping ducts: at 20, 100, 140, 220, 260 and 340 degree, above and below the middle plane.  Diverter access pipes: at 10, 110, 130, 230, 250 and 350 degree, above and below the middle plane.  ECH/Aux ports: at 35 degree, either above or below the middle plane.  Blanket helium/LiPb coolant pipes: at 0, 60 and 120 degree each field-period.  Hot supporting legs: at 0, 60, and120 degree each field-period.  Cold supporting legs: at 0, 60 and 120 degree each field-period.

5. Configuration showing the layout of power core components at 0 degree  The subdividing angle is 10 degree and 12 subdivisions in one field-period, and the module toroidal length varies from 1.75 m to 1.22 m, and the poloidal length varies from 2.3 to 3.5 m.  There are 66 blanket modules each field-period, and 198 for full field- period.  There are 24 diverter plates, and each diverter plate gives an average area of 3.25 m (toroidal) x 1.0 m (poloidal).  Each diverter plate is fed and supported by one coolant access pipe which is arranged in 10 and 110 degree.  Diverter shield modules are designed to be removable and can be replaced.

6. Configuration showing the layout of the diverter plates 0º0º 25 º 95 º 120 º  8 diverter plates each field-period, and 24 in total.

7. Diverter access pipes are arranged at 10 and 110 Degree in one field-period  Diverter plates are directly attached to the VV through the coolant access pipe.  There are 8 access pipes each field- period and they are accessible from outside coil structure.  There are 30 diverter pumping ducts with dimensions of 0.42 (radial) x 1.2 m (toroidal)  VV has been enlarged in order to place local shield behind the diverter pumping ducts to protect VV and magnets.  Diverter supply and return pipe is moved to outside of the magnet.

8. Shielding ring and block structurally connecting to the inner tube as a single unit  Move sliding seal closer to diverter plate.  Structurally connect the Shield Ring, Shielding Block and Inner Tube into a single assembly. The inner tube assembly can be removed as a single unit. Simple steps to disconnect the access pipe to diverter plate during maintenance operation: Open the Closure Flange from back of magnet; Push the Sliding Ring towards left side to make clearance for removing Inner Tube Bend; Remove the Inner Tube Bend; Remove the inner tube assembly. Use in-bore tools to cut the outer tube at the assembly weld.

9. Alterative design concept for diverter access pipe Large access pipe with shielding ring and block inside of the tube, OD~0.6 m Small access pipe without shield ring and block inside of the tube: OD ~0.35 m.

10. Configuration show the shielded vacuum pumping ducts at 20 Degree  ARIES-AT pumping approach is adapted in the ARIES-CS.  There are 30 diverter pumping ducts, 0.42 m (radial) x 1.2 m (toroidal). Total pumping area is 15 m 2, the same as the ARIES-AT.  Vacuum pumping ducts, 1.0 m (toriodal) x 1.25 m (poloidal), are arranged in 20 and 100 degree in one field-period, and 4 in field period, 12 in full field-period.

11. ECH/Auxiliary maintenance port and ECH module at 35 degree  ECH waveguide module is designed to be removable including waveguide, all shielding, bio- shield, mirror and vacuum vessel at outside of bio-shield.  ECH port will be considered as the auxiliary maintenance port to assist hardware operation during the maintenance. ECH Waveguide: 0.24 m (toroidal) x 0.54 m (poloidal) Opening in VV: 1.24 m (toroidal) x 1.54 (poloidal) Opening through coil structure: 1.92 m x 1.94 m

12. Configuration showing the arrangement of power core components at 40, 50 degree  First wall in each cross section has been redefined.

13. Inboard first wall at 60 degree is pushed 25 cm away from plasma surface  Inboard FW/Blanket at 60 degree has been pushed 25 cm away from the plasma surface in order to avoid the field lines hitting on the first wall.

14. Design of External Cryostat and Bio-Shield  The entire coil system is enclosed in a common cryostat, and the cryostat has updated with enforcing ribs.  The upper bio-shield piece is supported by the cylindrical bio- shield and support truss (ITER-like).  Port shielding is added in order to protect magnet after the  4 pair of extra PF coils are placed underneath of the power core in case any PF coils below the middle plane need to be replaced/repaired.

15. Top view showing the major maintenance ports and ECH/Aux maintenance ports  Major maintenance port: 1.8 m (toroidal) x 4.0 m (poloidal)  Auxiliary maintenance port: 1.92 m (toroidal) x 1.94 m (poloidal) Toroidal length of the blanket module varies from 1.75 m to 1.22 m; Polodal length of the blanket module varies from 2.3 m to 3.5 m. Diverter module is 3.25 m in toroidal, and 1.o m in poloidal.

16. Steps of Extracting the Blanket Modules at the Maintenance Port 1. Remove the Bio-shield Plug; 2. Open/Remove the vacuum door; 3. Remove the Port Shielding; 4. Cutting/Disconnecting access pipes to blanket module, then remove shield/manifold; 5. Remove the blanket module #1. 1 1 2 3 4 5 Bio-shield VV door Port shielding Shield/Manifold Blanket 1 2 3 4 5

17. 3D CAD Modelling for ARIES-CS Power Core Is Underway  Need to add more details, such as: Openings Supporting legs Cryostat Bio-shield

18. Summary  FW and diverter configuration have been redefined based the results of the field lines tracing.  The power core components including the FW/blanket, shield, manifold, cryostat and bio-shield have been updated and more design details, such as diverter pumping ducts, local shield, and ECH/Aux. maintenance ports have been added.  A 3D CAD modelling for the ARIES-CS power core is underway.  ARIES-CS CAD Website will be updated very soon.