Modelling the power deposition into a spherical tokamak fusion power plant
Modelling the power deposition into a spherical tokamak fusion power plant
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对球形托卡马克聚变发电厂的功率沉积进行建模
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
A. Sykes
中科院分区：
文献类型：
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作者：
C. Windsor;J. Morgan;P. Buxton;A. Costley;G.D.W. Smith;A. Sykes
对提高超导球形托卡马克聚变中试装置中心柱的性能进行了数值研究。假设的中子屏蔽层包括碳化钨和水的同心层。水层的相对厚度是变化的，并且在约17%的水处发现最小功率沉积。发现在芯附近具有大约1.7倍厚的水层和在等离子体附近具有类似的较薄层是有利的。使用硼化钨代替碳化钨被证明是一种改进，特别是如果靠近中心超导芯放置，仅内层就减少了29%的功率沉积。工程功能，如中央钢拉杆，绝缘热真空间隙，壁间隙旁边的等离子体和知识的垂直能量分布是必不可少的成功的设计和他们的影响上的功率沉积显示在附录中。结果已被拟合到模型分布，并纳入托卡马克能源系统代码，然后可以给出预测的功率沉积作为其他参数的函数，如等离子体的大半径和最大磁场上允许的超导体。
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.