Low-voltage power cable for nuclear power station

A low-voltage power and nuclear power plant technology, used in power cables with shielding/conducting layers, insulated cables, cables, etc., it can solve the problems of general shielding effect, inability to cope with high-temperature accident environments, etc., and achieve good immersion performance and insulation. , the effect of twisting convenience

Inactive Publication Date: 2013-03-06
JIANGSUSNGSHANG CABLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage: no shielding layer, the shielding effect is average, and it cannot cope with the high temperature environment of the accident
Its main disadvantage: no shielding layer, the shielding effect is average, and it cannot cope with the high temperature environment of the accident

Method used

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  • Low-voltage power cable for nuclear power station

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Embodiment

[0026] like figure 1 As shown, a low-voltage power cable for a nuclear power plant includes a conductor 1 . The number of conductors 1 is 2 or more, preferably 2-6. To illustrate the problem, 3 conductors are used as an example here. Each conductor 1 is extruded with an insulating layer 2, the insulating layer 2 and the conductor 1 form a core wire 3, three core wires 3 and filler 4 are stranded to form a cable core 5, and the cable core 5 is successively provided with a wrapping layer 6, a shielding layer 7 and a The sheath 8 and the shielding layer 7 are a copper-plastic composite tape, a braided layer of copper wire or a combination of the two. The cable core 5 is wrapped around the cladding layer 6 , and the shielding layer 7 is wrapped around the sheath 8 .

[0027] Among them: conductor 1 is preferably stranded tinned copper wire conductor; insulation layer 2 is preferably steam-crosslinked low-smoke, halogen-free, flame-retardant ethylene-propylene rubber insulation l...

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Abstract

The invention relates to a low-voltage power cable, in particular to a low-voltage power cable for a nuclear power station. The low-voltage power cable comprises at least two conductors (1), an insulation layer (2) is extruded outside each conductor (1), each conductor (1) and the corresponding insulation layer (2) form a core (3), each core (3) and packing (4) are stranded into a cable core (5), a wrapping layer (6), a shielding layer (7) and a sheath (8) are arranged outside the cable cores (5) sequentially, the shielding layer (7) is a combination of a copper-plastic composite belt and a copper wire braided layer, the wrapping layer (6) wraps the cable cores (5), and the sheath (8) is extruded outside the shielding layer (7). Therefore, the low-voltage power cable for the nuclear power station is high in long-term thermal aging resistance, nuclear radiation resistance, DBA (design basis accident) resistance and immersion performance after DBA.

Description

technical field [0001] The invention relates to a low-voltage power cable, in particular to a low-voltage power cable for nuclear power plants. The invention is suitable for cables with a rated voltage of 0.6 / 1kV. 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 si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/28H01B7/295
Inventor 王松明李斌梁福才凌国桢于雪芳曾庆涛潘冬雪
Owner JIANGSUSNGSHANG CABLE GROUP
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