Patent ID: 9704618
Date: 2017-07-11
CPC Classifications: G02B,G21D,H01B

Claim:
1. A nuclear power plant cable comprising: conductors; at least one or more insulation layers surrounding the conductors; a sheath surrounding the insulation layers; and monitoring means configured to monitor the states of the insulation layers or the state of the sheath in real time, wherein the monitoring means comprises at least one or more optical cables which sense temperature rise of the insulation layers or the sheath to find a point where a temperature is locally risen on the nuclear power plant cable, wherein each optical cable comprises optical fibers and radiation prevention parts surrounding the optical fibers, wherein the radiation prevention parts comprise a polymer fiber film made of a polymer material coated or taped on the optical fibers to surround the optical fibers and including an aromatic group, and the radiation prevention parts further comprise a metal thin film surrounding the optical fibers and having a value of Half Value Layer (HVL) less than 21.6 mm.