Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source

Y. Ogawa, Kunihiko Okano, N. Inoue, T. Amano, Y. Asaoka, R. Hiwatari, Y. Murakami, K. Takemura, K. Tokimatsu, K. Tomabechi, T. Yamamoto, T. Yoshida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We designed a volumetric neutron source for testing large-scale blanket components, based on a steady-state tokamak device with superconducting coils. It is found that a neutron flux of approximately 1.0 MW m-2 is available in the medium-size device (R = 4.5 m, a = 1.0 m, κ = 1.8, Ip = 5.6 MA) under the conditions of H ∼ 2 and βN ∼ 3 with a neutral beam injection (NBI) power of about 60 MW. We demonstrate the controllability of the current profiles required for high-beta plasma up to βN = 3-3.8 with the combination of bootstrap current and NB-driven current (Eb = 1.0 MeV). If an advanced performance scenario such as a reversed shear configuration is available, a neutron flux of 1.4 MW m-2 is achievable. We install the breeding blanket of Li-Pb only at outboard and upper regions, and find that a local tritium breeding ratio (TBR) of 1.5 is achievable and a net TBR of 0.8 could be available. The analysis of shielding materials at the inboard region shows that the proper combination of tungsten, steel and boric water yields a reduction of the nuclear irradiation of TF coil by a factor of approximately 10.

Original languageEnglish
Pages (from-to)469-475
Number of pages7
JournalFusion Engineering and Design
Volume41
Issue number1-4
Publication statusPublished - 1998 Sep 1
Externally publishedYes

Fingerprint

Tokamak devices
Tritium
Neutron flux
Neutron sources
Breeding blankets
Tungsten
Steel
Controllability
Shielding
Irradiation
Plasmas
Water
Testing
Superconducting coils

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

Ogawa, Y., Okano, K., Inoue, N., Amano, T., Asaoka, Y., Hiwatari, R., ... Yoshida, T. (1998). Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source. Fusion Engineering and Design, 41(1-4), 469-475.

Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source. / Ogawa, Y.; Okano, Kunihiko; Inoue, N.; Amano, T.; Asaoka, Y.; Hiwatari, R.; Murakami, Y.; Takemura, K.; Tokimatsu, K.; Tomabechi, K.; Yamamoto, T.; Yoshida, T.

In: Fusion Engineering and Design, Vol. 41, No. 1-4, 01.09.1998, p. 469-475.

Research output: Contribution to journalArticle

Ogawa, Y, Okano, K, Inoue, N, Amano, T, Asaoka, Y, Hiwatari, R, Murakami, Y, Takemura, K, Tokimatsu, K, Tomabechi, K, Yamamoto, T & Yoshida, T 1998, 'Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source', Fusion Engineering and Design, vol. 41, no. 1-4, pp. 469-475.
Ogawa Y, Okano K, Inoue N, Amano T, Asaoka Y, Hiwatari R et al. Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source. Fusion Engineering and Design. 1998 Sep 1;41(1-4):469-475.
Ogawa, Y. ; Okano, Kunihiko ; Inoue, N. ; Amano, T. ; Asaoka, Y. ; Hiwatari, R. ; Murakami, Y. ; Takemura, K. ; Tokimatsu, K. ; Tomabechi, K. ; Yamamoto, T. ; Yoshida, T. / Design of a steady-state tokamak device with superconducting coils for a volumetric neutron source. In: Fusion Engineering and Design. 1998 ; Vol. 41, No. 1-4. pp. 469-475.
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