Magnetohydrodynamic considerations for the design of self-cooled liquid-metal fusion reactor blankets Page: 1 of 2
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
MAGNETOHYDRODYNAMIC CONSIDERATIONS FOR THE
DESIGN OF SELF-COOLED LIQUID-METAL
FUSION REACTOR BLANKETS*
Basil F. Picologlou
Argonne National Laboratory
During the course of the Blanket Comparison and Selection Study,
magnetohydrodynamic effects were shown to present not only an
efficiency but also a feasibility issue for self-cooled liquid-
metal blankets, especially for tokamak machines. Based on state-
of-the art MHD analyses and understanding of related phenomena,
designs for both mirror and tokamak machines were developed. Al-
though details of the designs depend on specific reactor para-
meters, MHD related considerations were the main driver in the
development of the designs. This paper presents, in a unified
way, these considerations, as well as effective strategies to
minimize adverse MHD effects so that they can be used as guide-
lines by others in future design efforts.
Self-cooled liquid-metal blankets are attractive, compared to
other blanket concepts, because of their inherent simplicity and
favorable operating characteristics. The major challenge in the
design of liquid-metal blankets stems from the interaction of the
moving liquid-metal coolant/breeder with the large magnetic flux
densities required for plasma confinement. This interaction
results in induced electromotive forces, which drive currents
mainly through the conducting duct walls. These currents also
flow through the liquid metal and result in large body forces
opposing the liquid motion. Large driving pressures are needed to
overcome these body forces. These pressures not only affect
plant efficiency because of the potentially high parasitic coolant
pumping power, but may result in unacceptably high stresses within
the duct walls. Simply increasing the wall thickness to reduce
the stress is fruitless, because such an increase causes a
decrease in electrical resistance, an increase in current, and a
further increase in pressure. The problem is exacerbated by the
fact that relatively high velocities are required to cool the
first wall. The high velocities are needed to compensate for the
reduction in heat transfer, caused by the suppression of turbu-
Work supported by the U.S. Department of Energy/Office of Fusion
The submitted manuscript has been authored
by a contractor of the U. S. Government
under contract No. W-31-1Q9-ENG-3B.
Accordingly, the U. S. Government retains a
nonexclusive, royalty-free license to publish
or reproduce the published form of this
contribution, or allow others to do so, tor
U. S- Government purposes.
Distribution ofthis document is UNUHIED
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Picologlou, B.F. Magnetohydrodynamic considerations for the design of self-cooled liquid-metal fusion reactor blankets, article, January 1, 1985; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1097809/m1/1/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.