Thermal-hydraulic analysis of the coil test facility for CFETR.

Yong Ren,Lilong Qiu,Xiang Gao,Junjun Li,Zhaoliang Wang,Shijun Du,Xiaogang Liu,Guoqiang Li

doi:10.1186/s40064-016-3706-z

Abstract

BackgroundPerformance test of the China Fusion Engineering Test Reactor (CFETR) central solenoid (CS) and toroidal field (TF) insert coils is of great importance to evaluate the CFETR magnet performance in relevant operation conditions. The superconducting magnet of the coil test facility for CFETR is being designed with the aim of providing a background magnetic field to test the CFETR CS insert and TF insert coils.ResultsThe superconducting magnet consists of the inner module with Nb3Sn coil and the outer module with NbTi coil. The superconducting magnet is designed to have a maximum magnetic field of 12.59 T and a stored energy of 436.6 MJ. An active quench protection circuit and the positive temperature coefficient dump resistor were adopted to transfer the stored magnetic energy.ConclusionsThe temperature margin behavior of the test facility for CFETR satisfies the design criteria. The quench analysis of the test facility shows that the cable temperature and the helium pressure inside the jacket are within the design criteria.

Highlights

PERFORMACNE test of the China Fusion Engineering Test Reactor (CFETR) central solenoid (CS) and toroidal field (TF) insert coils is of great importance to evaluate the CFETR magnet performance in relevant operation conditions (Ren et al 2015a)
Description of the superconducting magnet The superconducting magnet consists of the inner module with Nb3Sn coil and the outer module with NbTi coil
The Nb3Sn cable is made of 864 Nb3Sn and 432 copper strands inserted into a round-in-square modified 316LN stainless steel jacket with low carbon content to form a Conduit Conductor (CICC) conductor

Summary

Introduction

Performance test of the China Fusion Engineering Test Reactor (CFETR) central solenoid (CS) and toroidal field (TF) insert coils is of great importance to evaluate the CFETR magnet performance in relevant operation conditions. The temperature margin behavior of the superconducting magnet needs to be analyzed in relevant operating conditions. The Nb3Sn CICC conductors are cooled with the forced flow supercritical helium at 0.55 MPa pressure, 12 g/s mass flow rate and 4.5 K temperature at the coil inlet.

Results

Conclusion