Manufacturing method of low-voltage power cables used in containment of third-generation nuclear power plants

A nuclear power plant containment and low-voltage power technology, applied in the direction of conductor/cable insulation, etc., can solve the safety function requirements of service life, radiation resistance, and flame retardancy, which cannot meet the requirements of third-generation nuclear power, service life, radiation resistance, and flame retardancy There is no big breakthrough in performance, and the effect of improving the ability to inhibit flame spread, excellent electrical performance, and compact cable structure is achieved.

Active Publication Date: 2016-10-05
SICHUAN MINGXING CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third-generation nuclear power plants put forward new requirements for the cables used. The nuclear-grade cables used in the existing second-generation or second-generation semi-nuclear power plants have a design service life, radiation resistance, flame retardancy, and design basis accident DBA and Post-DBA. Post-safety function requirements cannot meet the requirements of third-generation nuclear power
The invention patent does not have a big breakthrough in service life, radiation resistance and flame retardancy, and cannot operate for more than 60 years under normal working conditions in the third-generation nuclear power plant containment
[0005] The above-mentioned existing technologies cannot operate for more than 60 years under normal working conditions in the containment of third-generation nuclear power plants, and ensure that they can still perform their functions in design basis accidents DBA and Post-DBA

Method used

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  • Manufacturing method of low-voltage power cables used in containment of third-generation nuclear power plants

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Effect test

Embodiment 1

[0025] As a preferred embodiment of the present invention, the manufacturing method of the low-voltage power cable used in the containment of the third-generation nuclear power plant includes the following steps: material selection—wire drawing—annealing and tinning—conductor stranding—inner insulation layer and outer insulation layer co-extrusion Covering—irradiation crosslinking—cable—filling layer extrusion—outer sheath layer extrusion—irradiation crosslinking—performance inspection test—finished product packaging and warehousing.

[0026] Material selection refers to the selection of electrical copper wire blanks for the conductor, and the selection of polymer materials with a thermal life of more than 60 years after long-term heat resistance evaluation for insulation and sheath materials. The insulation and sheath materials of the present invention are selected from polymer materials whose thermal life is greater than 60 years after long-term heat resistance evaluation. Th...

Embodiment 2

[0035]As another preferred embodiment of the present invention, the manufacturing method of the low-voltage power cable used in the containment of the third-generation nuclear power plant includes the following steps: material selection—wire drawing—annealing and tinning—conductor stranding—inner insulating layer and outer insulating layer Extrusion coating—irradiation crosslinking—cable formation—filling layer extrusion—outer sheath layer extrusion—irradiation crosslinking—performance inspection test—finished product packaging and storage.

[0036] Material selection refers to the selection of electrical copper wire blanks for the conductor, and the selection of polymer materials with a thermal life of more than 60 years after long-term heat resistance evaluation for insulation and sheath materials. The insulation and sheath materials of the present invention are selected from polymer materials whose thermal life is greater than 60 years after long-term heat resistance evaluat...

Embodiment 3

[0045] As another preferred embodiment of the present invention, the manufacturing method of the low-voltage power cable used in the containment of the third-generation nuclear power plant includes the following steps: material selection—wire drawing—annealing and tinning—conductor stranding—inner insulating layer and outer insulating layer Extrusion coating—irradiation crosslinking—cable formation—filling layer extrusion—outer sheath layer extrusion—irradiation crosslinking—performance inspection test—finished product packaging and storage.

[0046] Material selection refers to the selection of electrical copper wire blanks for the conductor, and the selection of polymer materials with a thermal life of more than 60 years after long-term heat resistance evaluation for insulation and sheath materials. The insulation and sheath materials of the present invention are selected from polymer materials whose thermal life is greater than 60 years after long-term heat resistance evalua...

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Abstract

The invention discloses a method for manufacturing a low-voltage power cable used in the containment of a third-generation nuclear power plant, and relates to the field of cable manufacturing. The manufacturing method of the present invention includes: material selection—wire drawing—annealing and tinning—conductor stranding—inner insulation layer and outer insulation layer co-extrusion coating—irradiation crosslinking—cable formation—filling layer extrusion—outer sheath layer extrusion Packaging—irradiation crosslinking—performance inspection test—finished product packaging and warehousing, the material selection refers to the selection of electrical copper wire blanks for conductors, and the selection of insulation and sheath materials that have been evaluated for long-term heat resistance and have a thermal life of more than 60 years. Polymer Material. The low-voltage power cables manufactured by the manufacturing method of the present invention are greatly improved in service life, radiation resistance, and flame retardancy, and can be operated for more than 60 years under the normal working conditions of the third-generation nuclear power plants, and ensure that the design basis accident DBA and Post‑DBA is still able to perform its functions.

Description

technical field [0001] The invention relates to the field of cable manufacturing, in particular to a method for manufacturing a low-voltage power cable used in the containment of a third-generation nuclear power plant. Background technique [0002] In October 2012, the "Nuclear Power Plant Safety Plan (2011-2020)" and "Nuclear Power Mid- and Long-term Development Plan (2011-2020)" were discussed and approved. In terms of the pace of nuclear power plant construction, it is necessary to "reasonably grasp", "steadily advance", and "safely resume normal construction"; in terms of access thresholds, "new nuclear power units must meet the third-generation safety standards," and new nuclear power projects must be built in accordance with the world's highest safety requirements. This marks the restart of nuclear power projects, and the construction of third-generation nuclear power plants is imperative. [0003] The safety and economy of the third-generation nuclear power plant wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/14
Inventor 宋强陈光高沈智飞盛业武兰超王冰迪
Owner SICHUAN MINGXING CABLE
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