Will the new ITER fusion reactor actually work?

  • #26
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And (hopefully) if we do get to the stage where we can start building commercial nuclear fusion reactors we can then get stuck into the more promising R&D of aneutronic fusion.
I think the tokamak-based design ITER will hardly meet the necessary conditions to fuse deuterium and tritium. I believe the best option for aneutronic fusion still is electrostatic acceleration because it is much more energy-efficient than the tokamak magnetic compression, and some electrostatic fusion machine already has its conceptual break-even scheme for direct electric power production with net energy gain predictable by simple calculations.
 
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  • #27
I heard that ITER will have to be carefull not to have too many disruptions because that type of current can wreck the tiles and vessel and it might not be reusable? is this true?
 
  • #28
Astronuc
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I heard that ITER will have to be carefull not to have too many disruptions because that type of current can wreck the tiles and vessel and it might not be reusable? is this true?
I think that may be a reference to 'thermal shock' and 'thermal fatigue'. I'm not sure of the magnitude of temperature variation, but rapid heating and cooling can produce thermally-induced stresses that could nucleate and propagate cracks in ceramic (or otherwise brittle) material.

Thermal fatigue is certainly a concern.
 
  • #29
I was actually thinking about what happens when the actual magnetic boundary layer and fusion torroidal shape drops down and touches the wall or lower tooling. A large current will run out of the plasma and thru the vessel and tiles. The current moving against a magnetic field will create a large force that can damage tooling and tiles?
 

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