Title :
Modelling of quench in CICC with a central channel in the conduit
Author :
Freidberg, J.P. ; Shajii, A. ; Chaniotakis, E.A. ; McCarrick, J.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
Abstract :
This paper presents a theoretical model describing quench propagation in cable in conduit conductors (CICC) with an additional central flow channel. The central channel is used to enhance the flow capabilities in the conduit during steady state operation as well as during quench events. Such a system is the proposed design for certain conductors in the International Thermonuclear Experimental Reactor (ITER). Here, the additional channel is formed by a metal spring located at the center of the conduit. We describe the separate thermal evolution in both the cable bundle and the central channel; in particular, the mass, momentum and heat transfer due to flow between the cable bundle and the central channel are included in the model. Several simplifications are introduced which greatly reduce the complexity of the model without sacrificing accuracy. The resulting reduced model is solved both numerically and approximately analytically for ITER parameters
Keywords :
fusion reactor materials; fusion reactors; superconducting coils; CICC quench propagation; ITER; International Thermonuclear Experimental Reactor; additional central flow channel; cable bundle; cable in conduit conductors; central channel; flow capabilities; heat transfer; mass transfer; metal spring; momentum transfer; quench events; steady state operation; thermal evolution; Conductors; Heat transfer; Helium; Hydraulic diameter; Magnetic analysis; Magnets; Region 1; Region 2; Springs; Temperature;
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
DOI :
10.1109/FUSION.1993.518524