Highlights of ARIES-AT Study Farrokh Najmabadi For the ARIES Team VLT Conference call July 12, 2000 ARIES Web Site:

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Presentation transcript:

Highlights of ARIES-AT Study Farrokh Najmabadi For the ARIES Team VLT Conference call July 12, 2000 ARIES Web Site:

The ARIES-RS Study Set the Goals and Direction of Research for ARIES-AT

ARIES-AT 2 : Physics Highlights Use the lessons learned in the ARIES-ST optimization to reach a higher performance plasma; –Using > 99% flux surface from free-boundary plasma equilibria rather than 95% flux surface used in ARIES-RS leads to larger elongation and triangularity and higher stable  Eliminate HHFW current drive and use only lower hybrid for off- axis current drive. Perform detailed, self-consistent analysis of plasma MHD, current drive and divertor (using finite edge density, finite p, impurity radiation, etc.) ARIES-AT blanket allows vertical stabilizing shell closer to the plasma, leading to higher elongation and higher 

Outboard blanket & first wall ARIES-AT 2 : SiC Composite Blankets Simple, low pressure design with SiC structure and LiPb coolant and breeder. Innovative design leads to high LiPb outlet temperature (~1100 o C) while keeping SiC structure temperature below 1000 o C leading to a high thermal efficiency of ~ 60%. Simple manufacturing technique. Very low afterheat. Class C waste by a wide margin. LiPb-cooled SiC composite divertor is capable of 5 MW/m 2 of heat load.

ARIES-AT Also Uses A Full-Sector Maintenance Scheme

Major Parameters of ARIES-RS and ARIES-AT ARIES-RS ARIES-AT Aspect ratio Major toroidal radius (m) Plasma minor radius (m) Plasma elongation (  x ) Plasma triangularity (  x ) Toroidal  Electron density (10 20 m -3 ) ITER-89P scaling multiplier Plasma current1113

Major Parameters of ARIES-RS and ARIES-AT ARIES-RS ARIES-AT On-axis toroidal field (T)86 Peak field at TF coil (T) Current-drive power to plasma (MW)8136 Peak/Avg. neutron wall load (MW/m 2 )5.4/ 44.9/3.3 Fusion power (MW)2,1701,755 Thermal efficiency Gross electric power (MW)1,2001,136 Recirculating power fraction Cost of electricity (mill/kWh)7655

Our Vision of Magnetic Fusion Power Systems Has Improved Dramatically in the Last Decade, and Is Directly Tied to Advances in Fusion Science & Technology Estimated Cost of Electricity (c/kWh)Major radius (m) Present ARIES-AT parameters: Major radius:5.2 mFusion Power1,755 MW Toroidal  :9.2%Net Electric1,000 MW Wall Loading:3.3 MW/m 2 COE5.5 c/kWh

ARIES-AT is Competitive with Other Future Energy Sources EPRI Electric Supply Roadmap (1/99): Business as usual Impact of $100/ton Carbon Tax. AT 1000 (1 GWe) AT 1500 (1.5 GWe) Estimated range of COE (c/kWh) for 2020* * Data from Snowmass Energy Working Group Summary. Estimates from Energy Information Agency Annual Energy Outlook 1999 (No Carbon tax).