Ex-core nuclear measurement equipment nuclear-grade four-coaxial cable

Abstract

The invention relates to the technical field of the coaxial cable, especially ex-core nuclear measurement equipment nuclear-grade four-coaxial cable. The ex-core nuclear measurement equipment nuclear-grade four-coaxial cable comprises a conductor; an inner insulating layer is wrapped at the outside of the conductor, an outer insulating layer is wrapped at the outside of the inner insulating layer,an isolation layer one is wrapped at the outside of the outer insulating layer, an inner shield layer is wrapped at the outside of the isolation layer one, the isolation layer two is wrapped at the outside of the inner shield layer, an inner jacket one is warped at the outside of the isolation layer two, an outer shield layer is wrapped at outside of the inner jacket one; an inner jacket two is wrapped at the inside of the outer shield layer, a corrugated pipe is wrapped at the outside of the inner jacket two, and the outer jacket is wrapped at the outside of the corrugated pipe. The ex-corenuclear measurement equipment nuclear-grade four-coaxial cable disclosed by the invention is stable in structure, good in sealing and reliability, capable of saving the laying space, the coaxial detection parameter of the national nuclear power station pile type can be effectively matched, the problems that the national coaxial cable cannot tolerate the LOCA and the service cannot exceed 60 yearsare solved at the same time.

Description

technical field [0001] The invention relates to the technical field of coaxial cables, in particular to a nuclear-grade four-coaxial cable for nuclear testing equipment outside the reactor. Background technique [0002] The nuclear-grade quadaxial cable of the nuclear testing equipment outside the reactor is used for the transmission of the operating voltage and signal of the neutron detector between the detector junction box of the containment building and the penetration. The electrical performance and physical characteristics of the nuclear-grade quadaxial cables of the nuclear testing equipment outside the reactor shall be able to match the inorganic cables and penetrations of the neutron detectors in the containment building. Nuclear-grade quadaxial cables for nuclear testing equipment outside the reactor should have the characteristics of flame retardant, low smoke, halogen-free and flood-proof. [0003] At present, the coaxial cables used in domestic nuclear power pl...

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Problems solved by technology

[0003] At present, the coaxial cables used in domestic nuclear power plant systems include ordinary BOP coaxial cables and 1E-level coaxial cables. The environmental conditions are more harsh, and the requirements for the radiation resistance, LOCA resistance and life of the product are higher. In the past, the 1E-level coaxial cables used in the second-generation plus nuclear power plants in China were imported from abroad, and the performance of ordinary domestic coaxial cables is not enough. Meet the requirements of radiation resistance, LOCA resistance and 60-year lifespan

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