Compact tokamak reactors. Part 1 (analytic results) Page: 2 of 60
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Compact Tokamak Reactors
Part 1 (analytic results)
A. J. Wootton, J. C. Wiley, P. H. Edmonds and D. W. Ross
Fusion Research Center,
University of Texas at Austin,
Austin, TX 78712, USA
We discuss the possible use of tokamaks for thermonuclear power plants, in particular
tokamaks with low aspect ratio and copper toroidal field coils. Three approaches are
presented. First we review and summarize the existing literature. Second, using simple
analytic estimates, the size of the smallest tokamak to produce an ignited plasma is derived.
This steady state energy balance analysis is then extended to determine the smallest
tokamak power plant, by including the power required to drive the toroidal field, and
considering two extremes of plasma current drive efficiency. The analytic results will be
augmented by a numerical calculation which permits arbitrary plasma current drive
efficiency; the results of which will be presented in Part II. Third, a scaling from any given
reference reactor design to a copper toroidal field coil device is discussed. Throughout the
paper the importance of various restrictions is emphasized, in particular plasma current
drive efficiency, plasma confinement, plasma safety factor, plasma elongation, plasma
beta, neutron wall loading, blanket availability and recirculating electric power. We
conclude that the latest published reactor studies, which show little advantage in using low
aspect ratio unless remarkably high efficiency plasma current drive and low safety factor
are combined, can be reproduced with the analytic model.
DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United States
Government. Neither the United States Government nor any agency thereof, nor any of their
employees, makes any warranty, express or implied, or assumes any legal liability or responsi-
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process disclosed, or represents that its use would not infringe privately owned rights. Refer-
ence herein to any specific commercial product, process, or service by trade name, trademark,
manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-
mendation, or favoring by the United States Government or any agency thereof. The views
and opinions of authors expressed herein do not necessarily state or reflect those of the
United States Government or any agency thereof.
D b s?';jTN OF THIS DOCUMENT IS UNULM kSeptember 13, 1996
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Wootton, A. J.; Wiley, J. C.; Edmonds, P. H. & Ross, D. W. Compact tokamak reactors. Part 1 (analytic results), report, September 13, 1996; Austin, Texas. (https://digital.library.unt.edu/ark:/67531/metadc683438/m1/2/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.