Accession Number : ADP002544

Title :   Development of Composite Fiber-Optic Electric-Power Umbilical Cable and Optical Feedthrough for Deep Ocean Mining,

Corporate Author : SUMITOMO ELECTRIC INDUSTRIES LTD OSAKA (JAPAN)

Personal Author(s) : Mitsui,T. ; Gomi,T. ; Ito,T. ; Ushitani,S. ; Yamaguchi,M.

Report Date : 17 NOV 1983

Pagination or Media Count : 9

Abstract : The development of mining systems for mineral resources from deep ocean floors is now progressing in many countries. In Japan, the Agency of Industrial Science and Technology, has conducted research and development for a manganese nodule mining system. In this project, it is planned to use a new composite fiber-optic electric-power umbilical cable for electrical power and control signal transmission from a main vessel to subsea equipment such as lifting pumps and collecting devices at about 5,000 meters' depth. The umbilical cable system is required to have good resistance to repetitive bending, twisting, and other external forces and to be able to withstand water pressure of up to 550kgf/sq cm. A 100m-long sample umbilical cable, electrical connectors, and optical feedthroughs for this system have been developed and successfully passed mechanical, electrical, and optical tests. (Author)

Descriptors :   *Electric cables, *Fiber optics transmission lines, *Mining engineering, *Deep oceans, Ocean bottom, Transmitting, Electric power

Distribution Statement : APPROVED FOR PUBLIC RELEASE