Abstract:
The current fusion development scenario in Europe assumes the sequential
achievement of key milestones. Firstly, the qualification of the DEMO/reactor physics basis
in ITER, secondly, the qualification of materials for in-vessel components in IFMIF and,
thirdly, the qualification of components and processes in DEMO. Although this scenario is
constrained by budgetary considerations, it assumes the resolution of many challenges in
physics, technology and engineering.
In the first part of the paper, the technological and engineering challenges to be met
in order to satisfy the current development scenario will be highlighted. These challenges
will be met by an appropriate share of the work between ITER, IFMIF, DEMO and the
necessary accompanying programme, which will have to include a number of dedicated
facilities (e.g. for the development of H&CD systems).
In the second part of the paper, the consequences of a considerable acceleration of
the fusion development programme will be discussed. Although most of the technological
and engineering challenges identified above will have to be met within a shorter timescale, it
is possible to limit the requirements and expectation for a first fusion power plant with
respect to those adopted for the current fusion development scenario. However, it must be
recognised that such a strategy will inevitably result in increased risk and a reduction in the
economy of the plant.
