O. Mitarai et al.


Minimization of the External Heating Power by Long Fusion Power Rise-up Time for Self-ignition Access in the Helical Reactor FFHR2m

Date of publication:

Oct. 2006

Key words:

21 IAEA Fusion Energy Conference, FT/P5-24


Minimization of the external heating power to access self-ignition is advantageous to increase the reactor design flexibility and to reduce the capital and operating costs of the plasma heating device in a helical reactor. In this work we have discovered that a larger density limit leads to a smaller value of the required confinement enhancement factor, lower density limit margin reduces the external heating power, and over 300 s of the fusion power rise-up time makes it possible to reach a minimized heating power. While the fusion power rise-up time in a tokamak is limited by the OH transformer flux or the current drive capability, any fusion power rise-up time can be employed in a helical reactor for reducing the thermal stresses of the blanket and shields, because the confinement field is generated by the external helical coils.

List of NIFS Report (2006)Return toContents Page Return toNIFS Homepage
 National Institute for Fusion Science
Copyright: 1995-2007 National Institute for Fusion Science (NIFS)
Address: 322-6,Oroshi-cho, Toki, GIFU, 509-5292, Japan