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Can hydrogen be the transportation fuel in an otherwise nuclear economy?
Let’s face it: The global economy should be powered primarily by nuclear power. And it probably will by the end of this century, with a still-significant assist from renewables and hydro. Once nuclear systems are dominant, the costs come down to where gas is now; and when carbon emissions are reduced to a small portion of their present state, it will become obvious that most other sources are only good in niche settings. I mean, why use small modular reactors to load-follow when they can just produce that power instead of buffering it?
T. G. Brown, V. D. Lee, J. A. Mayhall
Fusion Science and Technology | Volume 10 | Number 3 | November 1986 | Pages 508-513
The Compact Ignition Tokamak Program | Proceedings of the Seveth Topical Meeting on the Technology of Fusion Energy (Reno, Nevada, June 15–19, 1986) | doi.org/10.13182/FST86-A24797
Articles are hosted by Taylor and Francis Online.
The Fusion Engineering Design Center (FEDC) performed a design study for a compact ignition tokamak based on the design approach established by Professor Bruno Coppi of the Massachusetts Institute of Technology in his Ignitor concept. His Ignitor concept has two unique features. First, the throat of the copper plate toroidal field (TF) coils is preloaded in the vertical direction to minimize the stress levels in the copper. Second, the net inward radial TF coil forces are balanced by a combination of wedging on the adjacent faces of the TF coils and by bucking against the ohmic heating solenoid coils in the bore of the tokamak. Later Ignitor concepts eliminated the wedging reactions. Both of these features inherently reduce the radial build of the tokamak device. The FEDC version of Ignitor incorporates both of these unique features packaged in a different configurational arrangement. The FEDC Ignitor features a totally external preload system. The preload is applied directly to the inner leg of the TF coils in the vertical direction only. Horizontal rings are utilized only to react inplane TF coil forces and are not part of the preload system. Modular quadrants of TF coil encasements are utilized to vastly simplify device assembly methods. This design allows the entire core assembly to be constructed in a manufacturing facility and shipped to the site. The improved configuration also results in larger access ports direly needed for diagnostics and radio frequency heating units which may be required. This paper presents the configuration and a structural assessment of the FEDC Ignitor concept.