Compensation cable for nuclear power plant

Abstract

The invention relates to a compensation cable, in particular to a compensation cable for a nuclear power plant. The technical scheme includes that the compensation cable for the nuclear power plant comprises conductors (1) with insulating layers (3), and is characterized in that each two corresponding conductors (1) with the insulating layers (2) are stranded to form a core wire (3), the two core wires (3) and a filler (4) are stranded to form a cable core (5), a wrapping layer (6), a copper-plastic composite belt shielding layer (7), a copper wire braided shielding layer (8) and a sheath (9) are sequentially arranged on the outside of the cable core (5), the wrapping layer (6) wraps the cable core (5), the copper-plastic composite belt shielding layer (7) wraps the outside of the wrapping layer (6), and the sheath (9) is extruded on the outside of the copper wire braided shielding layer (8). According to the technical scheme, the compensation cable has the particular advantages of high long-term thermal ageing resistance, high nuclear radiation resistance and high immersion resistance during and after a DBA (design basis accident).

Description

technical field [0001] The invention relates to a compensation cable, in particular to a compensation cable for nuclear power plants. The invention is suitable for cables with a rated voltage of 300 / 500V. The invention belongs to the technical field of cable application. Background technique [0002] AP1000 is the most advanced third-generation nuclear power technology in the world. AP1000 is a single-stack two-loop unit with a design life of 60 years. The main safety system adopts passive design and is arranged in the containment. The containment has a double-layer structure, the outer layer is prestressed concrete, and the inner layer is steel plate structure. [0003] According to the national nuclear power medium and long-term development plan: by 2020, China's nuclear power installed capacity will account for about 7% of the total installed capacity of electric power, reaching 75 million kilowatts. That is: China will approve the construction of at least six million...

AI Technical Summary

Problems solved by technology

Its main shortcomings: the cable core wire is multi-core structure twisted, and the processing is complicated; the first oxygen barrier layer and the second oxygen barrier layer are made of halogen-free low-smoke polyolefin wrapping tape and copper tape wrapping tape, and the radiation resistance is average. , the service life is average, unable to cope with the high temperature environment of the accident

Its main deficiency: general radiation resistance, unable to cope with accident high temperature environment

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