The reactor sector design of FBX-III moving plasma core reactor is undertaken at FBX-III project as a part of the FBX D-D BURNER REACTOR study. This sub-project aims for a technologicaly simple reactor core scheme.

The reactor sector is composed of a cylinder protyected by a passive blanket/heat exchanger. On the center axis of this cylinder, a toroidal field core is arranged to avoid inherent tilting instability. This system is surrounded by solenoidal equilibrium field coils to guide a plasma and to avoid adiabatic expansion cooling .

A train of virtualy identical high beta FBX plasmoids in fusion condition is injected from the production sector.

A preliminary design has been described elsewhere.

In this paper, we review the current design concept and summarize the results of detailed analysis and a small scale experiment on several of the key aspects of the plasma core design.

The design philosophy is to attain " the simplicity ". This should be a fundamental key to avoid engineering troubles.

At least in the current design, the experimentally under developped and still unclear tritium breeding sector is not included.This forces the FBX BURNER to be operated as a DD reactor.

In this sense, we expect this would be one of a few presentations dealing with the future D-D fusion scheme. *Work supported by Electro-Magnetic Research Laboratory