Integrated Design: APEX-Solid Wall FW-Blanket

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Presentation transcript:

Integrated Design: APEX-Solid Wall FW-Blanket S. Sharafat, P. Kachgal, K. Zhou, C. Wong, and N. Ghoniem APEX E-Meeting UCLA August 13 – 15, 2002

Objectives of Integrated Design 1. Analyze concept for: Geometric Fit Manufacturability Assembly 2. Evaluate Thermal and Stress response of components as part of the integrated system S. Sharafat: APEX E-Meeting (08/13/02)

APEX Solid Wall Reactor Major Radius 5.5 m Aspect Ratio 3.44 Elongation 2.15 Blanket Height 8.09 m S. Sharafat: APEX E-Meeting (08/13/02)

APEX Solid Wall Reactor Major Radius 5.5 m Aspect Ratio 3.44 Elongation 2.15 Blanket Height 8.09 m S. Sharafat: APEX E-Meeting (08/13/02)

Outboard Blanket Module Back Wall Side Wall Pb-Multiplier First Wall Entire Module (8 m tall) Details of the Blanket Internal Flow Channels S. Sharafat: APEX E-Meeting (08/13/02)

Top OB-Manifold Flow Return Manifold First Wall Details of the Top Blanket Flow Return Manifold S. Sharafat: APEX E-Meeting (08/13/02)

S. Sharafat: APEX E-Meeting (08/13/02) Bottom OB-Manifold First Wall S. Sharafat: APEX E-Meeting (08/13/02)

Bottom OB-Manifold Flow Circuit Central Channel Flow to/from HX (1 m/s) FW-Supply from MIXING Tank (3 m/s) Side and Back Wall Flow into MIXING Tank (3 m/s) MIXING Tank S. Sharafat: APEX E-Meeting (08/13/02)

Bottom ”Elephant” Manifold One of the Side/Back Wall Flow-Ducts Removed Close-up View of The “Elephant” Design View from the Bottom S. Sharafat: APEX E-Meeting (08/13/02)

Thermal Stress of OB-Blanket Thermal Stresses response of the FW due to a poloidally varying surface heat flux has been modeled. Assumptions: No Volumetric heating of the structure or coolant Effects of hydrostatic pressure of coolant are not included Coolant Pressure loads are not included No transient effects FEM Analysis Input Condition: Bottom Region Central Region Top Region FW Heat flux, MW/m2 0.42 1.0 Max. neutron wall loading, MW/m2 3.84 5.37 Poloidal peaking factor/average 1.4 FW mass flow rate, kg/s 108.4 T Coolant-bulk, ˚C 607 616 627 Flibe velocity, m/s 6.99 7.01 7.03 h, W/m2K 14531 15136 19345 FW NCF/Flibe T-Interface, ˚C 637 691 Pressure drop, MPa 0.8698 S. Sharafat: APEX E-Meeting (08/13/02)

Development of 3-D OB-Balnket FEM A 3-D FEM model is being developed: Simplified geometry is shown Short section is being analyzed Results are based on F82H thermal k = 33 W/m-k @700oC (Zinkle) Entire OB-Blanket sector is being developed The new model will include geometric details as shown in solid model Meshed Section of Part of the OB-Blanket S. Sharafat: APEX E-Meeting (08/13/02)

Scoping FW-Thermal Analysis Result Only applied convection inside the FW-channels h =15,000 W/m2-K q” = 1 MW/m2 Future models will have Rounded FW-Channels Convection on all inside walls Varying h along the height of the OB-sector Varying Heat flux on the FW Scoping results show FW temperatures of around 700oC S. Sharafat: APEX E-Meeting (08/13/02)

Preliminary Findings of Integrated Design Geometric Fit: Top and bottom Manifolds fit inside Reactor Space Mixing tank can be located inside the Vacuum Vessel Next Phase of Design: Multiplex 9-OB Sectors into one Module Simplify the “Elephant” piping inside the V.V. One MIXING Tank per Module (16 total) Manufacturability not addressed 3-D FEM model development is still underway; scoping results show Fem analysis using shell-elements may be feasible for such a large structure S. Sharafat: APEX E-Meeting (08/13/02)