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Modelling the power deposition into a spherical tokamak fusion power plant

机译：对球形托卡马克聚变电厂的功率沉积进行建模

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摘要

Numerical studies have been made to improve the performance of the central column of a superconducting spherical tokamak fusion pilot plant. The assumed neutron shield includes concentric layers of tungsten carbide and water. The relative thickness of the water layers was varied and a minimum power deposition was found at about 17% of water. It was found advantageous to have an approximately 1.7 times thicker water layer next to the core and a similarly thinner layer next to the plasma. The use of tungsten boride instead of tungsten carbide was shown to make an improvement especially if placed close to the central superconducting core, the inner layer alone reducing the power deposition by 29%. Engineering features such as a central steel tie-bar, an insulating thermal vacuum gap, a wall gap next to the plasma and knowledge of the vertical energy distribution are essential to a successful design and their effects on the power deposition are shown in an appendix. The results have been fitted to model distributions and incorporated into the Tokamak Energy System Code, which can then give predictions of the power deposition as a function of other parameters such as the plasma major radius and the maximum magnetic field permitted on the superconductors.
机译：进行了数值研究，以改善超导球形托卡马克聚变中试装置中心柱的性能。假设的中子防护罩包括碳化钨和水的同心层。水层的相对厚度是变化的，并且发现最小的功率沉积为水的约17％。发现有利的是，在芯附近具有约1.7倍厚的水层，在等离子体附近具有类似地较薄的层。已证明使用硼化钨代替碳化钨会有所改善，特别是如果放置在中央超导磁芯附近，仅靠内层就可将功率沉积降低29％。诸如中央钢拉杆，隔热真空间隙，等离子旁的壁间隙以及垂直能量分布等技术特征对于成功设计至关重要，附录中显示了它们对功率沉积的影响。结果已拟合到模型分布中，并纳入了Tokamak能源系统代码，该代码随后可以根据其他参数（例如等离子长半径和超导体上允许的最大磁场）来预测功率沉积。

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  • 来源
    《Nuclear fusion》 |2017年第3期|036001.1-036001.13|共13页
  • 作者

    C.G. Windsor; J.G. Morgan; P.F. Buxton; A.E. Costley; G.D.W. Smith; A. Sykes;

  • 作者单位

    Tokamak Energy, D5, Culham Science Centre, Abingdon, OX14 3DB, UK;

    Culham Electromagnetics, D5, Culham Science Centre, Abingdon, OX14 3DB, UK;

    Tokamak Energy, D5, Culham Science Centre, Abingdon, OX14 3DB, UK;

    Tokamak Energy, D5, Culham Science Centre, Abingdon, OX14 3DB, UK;

    Department of Materials, University of Oxford, 16 Parks Road, Oxford, OX1 3PH, UK;

    Tokamak Energy, D5, Culham Science Centre, Abingdon, OX14 3DB, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spherical tokamaks; fusion reactors; superconducting magnets;

    机译：球形托卡马克聚变反应堆超导磁体;

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