Power cable used for nuclear power plant

Abstract

The invention discloses a power cable used for a nuclear power plant. The power cable comprises conductors, insulation layers and sheath layers, wherein the silver-plated copper conductors are wrapped by the inflaming retarding crosslinking polyolefin insulation layers to form conductor cores; after every three conductor cores are twisted, a tinned copper wire shielding layer is arranged on the outer sides of the conductor cores to form an insulation cable core; three insulation cable cores are combined and are wrapped by a wrapping tape layer; a lining layer and an armor layer are arranged outside the wrapping tape layer in sequence; the outer side of the armor layer is wrapped by a high inflaming retarding low smoke zero halogen radiation protection and ozone prevention polyolefin sheath layer; three insulation cable cores II are arranged among the three insulation cable cores; each insulation cable core II is formed in a way that two conductor cores II are twisted and are wrapped by a tinned copper wire shielding layer II; a plurality of nylon ropes are arranged among the three insulation cable cores and in the center of the cable. The power cable used for the nuclear power plant has the performance indexes of low smoke, zero halogen, inflaming retarding ad the like, and meanwhile the effects of radiation protection and corrosion protection are realized.

Description

technical field [0001] The invention relates to the cable industry, in particular to a power cable for nuclear power plants. Background technique [0002] The cable is usually a rope-like cable twisted by several or several groups of wires, and each group is twisted with at least two wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer surface is covered with a highly insulated overlay. Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, aluminum alloy cables and so on. They are all composed of single or multi-strand wires and insulation layers, and are used to connect circuits, electrical appliances, etc. [0003] Cables for nuclear power plants are mainly distributed in nuclear islands and conventional islands for power transmission and control, computer, instrument connect...

AI Technical Summary

Problems solved by technology

The types of cables required for nuclear power plants are basically the same as those for thermal power plants. However, due to the strict requirements on the technical performance of cables in nuclear power plants such as halogen-free, low-smoke, and low-toxicity, for now, my country can only produce wires and cables for the periphery of nuclear islands. The cables for other applications mostly rely on imports

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