Trial Manufacture of a 30 m Cable-in-Conduit-Conductor (CICC) for HT-7U

This paper reports the working procedure of a 30 m cable-in-conduit-conductor (CICC), which has been first successfully fabricated by a working group of IPP in Jan. 1999. A series of problems along with measures for their solution were put forward at the request of engineering design on the basis of an in-depth understanding of the basic performance of the related techniques for the manufacture of CICC. Through a full-scale trial manufacture of a 30 m conductor including a series of test on performance technology such as tube-tube butted welding, pulling, equaring, prebending and take-up, the trial manufacture of the first home-made CICC conductor has been accomplished, demonstrating that the fabrication of a long-length CICC is entirely possible theorically and practically through our own efforts. Results and problems concerned in this trial fabrication are also presented in the paper.