多电磁工况下的CFETR中窗口电磁结构耦合分析

Electromagnetic-structure coupling analysis of EDPP for CFETR under multiple electromagnetic conditions

中国聚变工程试验堆(China Fusion Engineering Test Reactor,CFETR)是中国自主设计研发的全超导托卡马克装置,其目的是解决国际热核聚变实验堆(International Thermonuclear Experimental Reactor,ITER)和聚变示范堆(DEMO)之间的物理与工程技术问题。诊断窗口是CFETR装置中一个关键部件,通过其内部安放的诊断系统可实现装置运行参数监测及反馈控制。由于诊断窗口靠近等离子体区域,电磁工况发生时在部件上感应产生的巨大电磁载荷将影响装置的结构稳定性。为了研究不同电磁工况时赤道面中窗口(Equatorial Diagnostic Port Plug,EDPP)上产生的电磁载荷,首先,根据CFETR诊断系统要求,完成了EDPP的概念设计;然后,利用商用有限元分析软件ANSYS,完成了10 MA等离子体在线性和指数两种工况下的电磁载荷评估。此外,还探讨了EDPP整体式和分布式两种方案设计对电磁载荷分布的影响。结果表明:整体式和分布式模型上产生的最大应力均小于10 MPa,满足设计要求。两种方案设计均表现出线性破裂产生的电磁载荷大于指数破裂。

[Background]China fusion engineering test reactor(CFETR),a fully superconducting tokamak device designed and developed in China,aims to solve the physical and engineering problems between international thermonuclear experimental reactor(ITER)and the DEMO.The diagnostic port plug is a key part of the CFETR device and its internal diagnostic system can realize the monitoring and feedback control of the device's operating parameters.As the diagnosis port plug is close to the plasma area,the huge electromagnetic(EM)load induced on this component during the plasma disruption will affect the stability of the device structure.[Purpose]This study aims to analyze the EM load on equatorial diagnostic port plug(EDPP)under different EM conditions.[Methods]First of all,the conceptual design of EDPP was completed according to the requirements of CFETR diagnostic system.Then,the EM loads of 10 MA plasma under linear and exponential conditions were evaluated using the commercial finite element analysis software ANSYS.Finally,the effects of the integrated and distributed scheme designs on the EM load distribution of the EDPP were discussed.[Results&Conclusions]The results show that the maximum stress generated on the EDPP with an integrated or distributed design are both less than 10 MPa,which meets the design requirements.In addition,the maximum EM load on the EDPP shows that the plasma linear disruption is greater than the exponential disruption.