Conceptual design of a poloidal field coil system and operation scenario for an inductively operated day-long pulsed tokamak reactor

J. F. Wang, T. Yamamoto, T. Amano, Y. Ogawa, K. Okano, N. Inoue

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The conceptual design of a poloidal field coil system and operation scenario for an inductively operated day-long pulsed tokamak (IDLT) reactor are discussed. Much attention is paid to the start-up and shut-down phase, because a shorter dwell time is preferable in the pulsed reactor. A plasma current ramp-up time of 100 s is achievable with a power supply of 1.4 GW. Including the current ramp-down time and recharging periods, it is found that a dwell time of 5-10 min is feasible for IDLT reactor operation. The average hysteresis loss of the central solenoid coil is about 5 kW during the current ramp-up phase, and is acceptable for the superconducting coils. Plasma performance is analyzed with a 1.5-dimensional transport code, where a Bohm type transport model is employed. It is found that ignition can be initiated with an auxiliary heating power of 40 MW with the H factor of approximately 2, and can be sustained for a helium recycling coefficient less than RHe = 0.99. For IDLT reference operation with RHe = 0.95 and peaking parameter Cv = 1.0, it is found that the helium accumulation fraction is 9.8%, the ratio of helium effective particle confinement time τp* to energy confinement time τE is 7.8, and the bootstrap current fraction is 40%. During the shut-down phase, the decrease in plasma density is slower than the decrease in fusion power, and an auxiliary heating power of 20 MW is required to avoid density-limit disruption.

本文言語English
ページ(範囲)69-77
ページ数9
ジャーナルFusion Engineering and Design
29
C
DOI
出版ステータスPublished - 1995 3月 3

ASJC Scopus subject areas

  • 土木構造工学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)
  • 機械工学

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