Proposal for a material irradiation test reactor based on a steady-state subignited tokamak plasma

Yuichi Ogawa, Nobuyuki Inoue, Kunihiko Okano

Research output: Contribution to journalArticle

Abstract

As an intense 14-MeV neutron source, a steady-state subignited tokamak plasma is proposed, where a 60-MW neutral beam is injected to sustain a subignited plasma and to drive a plasma current for steady-state operation. Plasma and device parameters are self-consistently designed, taking into account physical (confinement characteristics, beta limit, current drive efficiency, and so on) and engineering (maximum magnetic field strength, blanket/shield thickness, and others) constraints. The result of a comparison between plasmas with A = 2.8 and A = 4 indicates that a large aspect-ratio device is preferable as a neutron source. A surface-averaged 14-MeV neutron flux of approximately 0.6 MW/m2 is achievable with R = 4 to 5 m, A = 4, and Bmax = 10 T and is not so sensitive to the major radius. When the maximum magnetic field strength of toroidal field coils is raised to 13 T, a neutron flux more than 1 MW/m2 is available with a device with R = 4 m. If the plasma performance is advanced and plasmas with an L-mode enhancement factor fL of approximately 3 and a Troyon coefficient in beta limit g of approximately 5 are attainable, a neutron flux of approximately 1.6 MW/m2 is achievable even with a device with R = 4 m and Bmax = 10 T. These devices seem to be very attractive not only as a neutron source but also as a supplementary device of an ignition-oriented International Thermonuclear Experimental Reactor (ITER) device.

Original languageEnglish
Pages (from-to)168-178
Number of pages11
JournalFusion Technology
Volume26
Issue number2
Publication statusPublished - 1994 Sep
Externally publishedYes

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proposals
reactors
Irradiation
Plasmas
irradiation
Neutron flux
Neutron sources
neutron sources
flux (rate)
field strength
Magnetic fields
Experimental reactors
field coils
blankets
plasma currents
neutral beams
magnetic fields
ignition
Ignition
aspect ratio

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Proposal for a material irradiation test reactor based on a steady-state subignited tokamak plasma. / Ogawa, Yuichi; Inoue, Nobuyuki; Okano, Kunihiko.

In: Fusion Technology, Vol. 26, No. 2, 09.1994, p. 168-178.

Research output: Contribution to journalArticle

Ogawa, Yuichi ; Inoue, Nobuyuki ; Okano, Kunihiko. / Proposal for a material irradiation test reactor based on a steady-state subignited tokamak plasma. In: Fusion Technology. 1994 ; Vol. 26, No. 2. pp. 168-178.
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