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

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...

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

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