Magnetohydrodynamic considerations for the design of self-cooled liquid-metal fusion reactor blankets Page: 2 of 2
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lence by the magnetic field* If the high velocities were to be
transverse to the large toroidal field the pressure drop would be
A solution to these problems, for the tokamak reactor, requires
that the high velocity coolant channels be aligned with the large
toroidal field, and that the remaining ducts, which are by geo-
metrical necessity transverse to the toroidal field, be made as
large as possible. In addition, the wall thickness of the ducts
is decreased and the effective duct sizes are increased in the low
pressure, downstream side. Liquid-metal-cooled design can be
improved significantly, if laminated construction with elec-
trically insulating middle layers or electrically insulating
coatings on the inner duct surfaces are employed. The use of such
insulators both decouples the pressure bearing structure from 'the
MHD pressure drop, and reduces significantly (in the case of
insulating coatings dramatically) the coolant pressure.
These strategies for dealing with MHD-related design problems must
be carried out with due consideration to 3-D MHD effects, so that
design solutions, introduced to deal with one aspect of the
problem, do not cause additional 3-D effects, and thus undesirable
additional pressure drops and flow nonuniformities. Although
detailed analyses of 3—D effects exist only for a very few cases,
a simple circuit model can be used to help in the evaluatxon of
design options and formulation of desirable design configurations.
The purpose of this paper is to present this model and related MHD
facts In a concise form, intended for the designer, and to
illustrate their use In evaluating and guiding the design pro-
cess. The model is also used to derive quantitative functional
requirements for both laminated structures ard insulating
coatings. The functional requirements indicate that further
substantial improvements in blanket design and performance are
This report was prepared as an account of work sponsored by an agency of the Umted S ates
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United States Government or any agency thereof.
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Picologlou, B.F. Magnetohydrodynamic considerations for the design of self-cooled liquid-metal fusion reactor blankets, article, January 1, 1985; Illinois. (digital.library.unt.edu/ark:/67531/metadc1097809/m1/2/: accessed February 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.