The long-length line for jacketing cable-in-conduit conductors

First qualification of ITER Toroidal Field Coil conductor jacketing

“…If the sliding friction between the jacket and cable is the same for the JAEA and Russian insertions, then a maximum pulling force of 32 kN for the 760 m Cu dummy conductor is a reasonable value, taking into account the 33% increase in unit length weight of the JAEA conductor compared to the Russian Cu dummy conductor. Russian data indicates a saturation of the pulling force at around 23 kN after 500 m. This saturation may be due to a drop in the imperfections in the cable and jacket as a result of an increase in the pulling force, such that the contact area of the cable and jacket approaches an ideal position and the sliding friction force decreases [2]. In the case of the present qualification, we think that the cable and jacket were in a nearly ideal position at the outset due to the straightening of the cable and jacket prior to cable insertion.…”

“…The nominal gap between the jacket and cable is 1.5-2 mm for ITER CS and TF model coil conductor fabrication [2,4]. Taking into account the dimensional tolerances of the TF conductor cable (41.8 + 0.2/−0.3 mm) and jacket, we have chosen a jacket nominal inner diameter of 44.2 mm.…”

“…4 shows the pulling force as a function of cable length. The unit length weight (kg/m) of a 760 m Cu dummy conductor is heavier by approximately 33% compared to that of the 860 m long Cu dummy inserted in Russia [2]. If the sliding friction between the jacket and cable is the same for the JAEA and Russian insertions, then a maximum pulling force of 32 kN for the 760 m Cu dummy conductor is a reasonable value, taking into account the 33% increase in unit length weight of the JAEA conductor compared to the Russian Cu dummy conductor.…”

“…During the ITER Engineering Design Activities (EDA) period, the fabrication process of a 860 m long Cu dummy conductor was demonstrated in Russia [2]. However, conductor design in terms of the cable diameter, number of strand (1080 strand) and unit weight (heavier by about 33%), has changed significantly from that of the ITER EDA period.…”

Fabrication and tests of EF conductors for JT-60SA

“…Jacketing experiences [4][5][6] show that the eff is from 0.5 to 0.7. The weight of the EF-H cable which is the heaviest cable was expected to be 1097 kg at design phase.…”