The concept of drastically easy maintenance (DREAM) tokamak reactor
The concept of drastically easy maintenance (DREAM) tokamak reactor
复制标题
极易维护（DREAM）托卡马克反应堆的概念
DOI：
10.1016/0920-3796(94)90072-8
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Y. Seki
中科院分区：
文献类型：
--
作者：
S. Nishio;Y. Murakami;Adachi Junichi;H. Miura;I. Aoki;Y. Seki
发电厂最重要的特征之一是高可用性。一个简单的维护方案对于高可用性操作是必不可少的。为了便于维护，我们采用了一种等离子体构型，该构型具有约为6的大展弦比（细长的甜甜圈形状）和少量的12个环面扇区。相邻的环面扇区通过螺栓法兰结构机械连接。等离子体真空区域包括低温恒温器系统和12个水平通道门。在相邻的环向场（TF）线圈之间的单个径向直线运动中水平地拉出每个环面扇区的整个区段。TF线圈系统嵌入反应堆厂房中，可以独立于环形结构进行维修。该圆环结构由屏蔽一体化真空室、偏滤器结构和氚燃料增殖包层结构组成。偏滤器或包层系统在环面结构被拉出之后从横向（环形）方向被替换。即使在环形内侧区域，由于高纵横比反应器配置，相邻TF线圈之间也存在1 m的间隙。因此，所有的管道和馈线系统都集中在环形内侧区域。整个机器的大小是由3 GW的聚变功率和几乎100%的自举电流与3.5，磁流体动力学安全系数为5和等离子体伸长率为1.6的适度Troyon系数确定的。
One of the most important features of a power plant is high availability. An easy maintenance scheme is indispensable for high availability operation. For the easy maintenance scheme, a plasma configuration with high aspect ratio (with slender doughnut shape) of about 6 and a small number of 12 torus sectors is introduced. The adjacent torus sectors are jointed mechanically by a bolt-flange structure. The plasma vacuum region comprises a cryostat system and 12 horizontal access doors. A whole section of each torus sector is pulled out horizontally in a single radial straight motion between the adjacent toroidal field (TF) coils. The TF coil system is imbedded in the reactor building and can be repaired independent of the torus structure. The torus structure consists of a shield integrated vacuum vessel, a divertor structure and a tritium fuel breeding blanket structure. The divertor or blanket system is replaced from the transverse (toroidal) direction after the torus structure is pulled out. Even in the torus inboard region, there is a gap of 1 m between adjacent TF coils because of the high aspect ratio reactor configuration. Therefore, all the piping and feeder systems are gathered at the torus inboard region. The overall machine size is determined by a fusion power of 3 GW and almost 100% bootstrap current with a moderate Troyon coefficient of 3.5, magnetohydrodynamic safety factor of 5 and plasma elongation of 1.6.