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Development of integrated system of remountable superconducting magnet, first wall and liquid blanket for prototype reactor.

为原型反应堆开发可拆卸超导磁体、第一壁和液体覆盖层的集成系统。

基本信息

批准号：
15360487
负责人：
HIDETOSHI Hashizume
金额：
$ 8.32万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

Remountable HTS magnet system was proposed as a new design of fusion reactor to reduce both construction and maintenance costs in term of superconducting magnet. Objective of this study is feasibility demonstration of remountable HTS magnet by clarifying basic properties in butt joint of HTS cable and proving robustness of HTS cable against heat generation at jointing parts in butt joint at liquid nitrogen temperature below several hundreds amperes.Firstly, fundamental studies on the butt joint of HTS tape were performed to clarify the basic properties. Experimental results showed that joint resistance increased when transport current increased. According to numerical analysis, the dependence of joint resistance on transport current is caused by degradation of HTS filament near the contact surface. It was also confirmed that relative position of HTS filament does not affect joint performance by the numerical analysis. The fact indicates that contact condition is dominant to decide the … More joint performance. From mentioned above, some basic properties in the butt joint of HTS cable was clarified. In addition, it was considered that metal-plating is predicted to be effective to protect and improve contact surface condition. Based on the fundamental studies, the butt joint performance of laminated HTS cable was evaluated experimentally. At first, it was confirmed that metal-plating was effective to protect and improve contact surface condition. Furthermore, thermal quench and decrease of critical current did not occur. This fact shows that HTS cable has robustness against heat generation at jointing parts in butt joint at liquid nitrogen temperature below several hundreds amperes. At the end of this study, prototype of the remountable HTS magnet was fabricated and its performance was evaluated to suggest future tasks of development of the remountable HTS magnet. And it was indicated that the remountable HTS magnet has an advantage in term of energy loss compared to copper magnet. Less

为了降低超导磁体的建造和维护成本，提出了一种新的聚变反应堆设计方案--可拆卸高温超导磁体系统。本研究的目的是通过阐明高温超导电缆对接部分的基本特性和证明高温超导电缆在液氮温度低于数百安培时对对接部位发热的稳健性，论证可再安装高温超导磁体的可行性。首先，对高温超导带材对接部分进行了基础研究，明确了高温超导带材的基本特性。实验结果表明，随着传输电流的增大，接头电阻增大。根据数值分析，接头电阻对传输电流的依赖关系是由接触面附近高温超导灯丝的退化引起的。数值分析也证实了高温超导纤维的相对位置对接头性能没有影响。事实表明，接触条件是决定…的主要因素更多的联合表演。在此基础上，阐明了高温超导电缆对接接头的一些基本特性。此外，认为电镀金属可以有效地保护和改善接触表面状况。在理论研究的基础上，对高温超导叠层电缆的对接性能进行了实验评价。首先，证实了金属镀膜对保护和改善接触表面状况是有效的。此外，没有发生热猝灭和临界电流下降。这一事实表明，高温超导电缆在液氮温度低于几百安培的情况下，对对接部位的焊接部位具有较强的抗生热能力。在本研究的最后，制作了可再安装高温超导磁体的样机，并对其性能进行了评估，提出了可再安装高温超导磁体未来的发展任务。结果表明，与铜磁体相比，可再安装高温超导磁体在能量损耗方面具有优势。较少