Generation of net electric power with a tokamak reactor under foreseeable physical and engineering conditions

R. Hiwatari, Y. Asaoka, Kunihiko Okano, T. Yoshida, K. Tomabechi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study reveals for the first time the plasma performance required for a tokamak reactor to generate net electric power under foreseeable engineering conditions. It was found that the reference plasma performance of the ITER inductive operation mode with βN = 1.8, H H = 1.0, and f n GW = 0.85 had sufficient potential to achieve the electric break-even condition (net electric power Pe net = 0 MW) under the following engineering conditions: machine major radius 6.5 m ≤ Rp ≤ 8.5 m, the maximum magnetic field on TF coils B tmax = 16 T, thermal efficiency ηe = 30%, and NBI system efficiency ηNBI = 50%. The key parameters used in demonstrating net electric power generation in tokamak reactors are β N and f nGW. βV ≤ 3.0 is required for P e net ∼ 600 MW with fusion power Pf ∼ 3000MW. On the other hand, fnGW ≥ 1.0 is inevitable to demonstrate net electric power generation, if high temperatures, such as average temperatures of Tave > 16 keV, cannot be selected for the reactor design. To apply these results to the design of a tokamak reactor for demonstrating net electric power generation, the plasma performance diagrams on the Q vs Pf (energy multiplication factor vs fusion power) space for several major radii (i.e. 6.5, 7.5, and 8.5 m) were depicted. From these figures, we see that a design with a major radius Rp ∼ 7.5 m seems preferable for demonstrating net electric power generation when one aims at early realization effusion energy.

Original languageEnglish
Pages (from-to)106-116
Number of pages11
JournalNuclear Fusion
Volume44
Issue number1
DOIs
Publication statusPublished - 2004 Jan
Externally publishedYes

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electric power
reactors
engineering
radii
fusion
reactor design
thermodynamic efficiency
multiplication
coils
diagrams
energy
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Nuclear and High Energy Physics

Cite this

Generation of net electric power with a tokamak reactor under foreseeable physical and engineering conditions. / Hiwatari, R.; Asaoka, Y.; Okano, Kunihiko; Yoshida, T.; Tomabechi, K.

In: Nuclear Fusion, Vol. 44, No. 1, 01.2004, p. 106-116.

Research output: Contribution to journalArticle

Hiwatari, R. ; Asaoka, Y. ; Okano, Kunihiko ; Yoshida, T. ; Tomabechi, K. / Generation of net electric power with a tokamak reactor under foreseeable physical and engineering conditions. In: Nuclear Fusion. 2004 ; Vol. 44, No. 1. pp. 106-116.
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