Electrical penetration piece sealed by ceramics and metal and used for nuclear reactor

Abstract

The invention relates to an electrical penetration piece sealed by ceramics and metal and used for a nuclear reactor, which belongs to the technical field of a nuclear reactor structure and comprises a plurality of groups of conductor assemblies, a barrel, a pressure monitoring and air charging device and the like. The conductor assemblies are arranged in the barrel, two ends of the conductor assemblies extend out of end plates at two ends of the barrel and fixed on the end plates through pressing nuts, and the pressure monitoring and air charging device is connected with the barrel. The conductor assemblies are composed of metal sheath tubes, a plurality of leads and porcelain tubes. The plurality of leads are arranged in the metal sheath tubes, sealing insulation media are arranged among the leads in the metal sheath tubes, sealing insulation porcelain plates are arranged among the leads at the ends of the metal sheath tubes, ceramic insulation coating is coated on the surfaces of the leads extending out of the ends of the metal sheath tubes, and the insulation porcelain tubes are sleeved on the surfaces of the leads extending out of the ends of the metal sheath tubes. The penetration piece has the advantages of being irradiation resisting, ageing resisting, corrosion resisting, high temperature resisting, vibration resisting and high voltage resisting and the like, simple in manufacture, low in cost and long in service life cycle.

Description

technical field [0001] The invention relates to an electric penetrating piece used in a nuclear reactor sealed by ceramics and metal, and belongs to the technical field of nuclear reactor structures. Background technique [0002] The reactor electrical penetration is installed on the reactor to realize the electrical connection of the electrical equipment inside and outside the reactor, and is a reactor pressure boundary component. Therefore, it must not only be able to withstand long-term radiation, corrosion, high temperature and aging, and ensure the sealing and electrical continuity under normal operating conditions, but also need to meet the above requirements under various accident conditions (such as earthquakes, LOCA), etc. . Patent No. CN 202076496 "Electrical Penetration for Armored Conductor Cermet Insulators" discloses an electrical penetration structure, which is simple and reliable, and has a long service life, but has the following problems: 1. The two ends o...

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Problems solved by technology

Patent No. CN 202076496 "Electrical Penetration for Armored Conductor Cermet Insulator" discloses an electrical penetration structure, which is simple and reliable, and has a long service life, but has the following problems: 1. The two ends of the metal armored tube of the penetration The structure adopted cannot prevent the filling of Al between the core wire and the metal armor tube 2 o 3 Or the MgO heat-resistant insulating layer is damp and the insulation performance is reduced; 2. The welding or brazing seal between the metal armored pipe of the penetration and the flange perforation is due to the thick metal (flange) and thin shell (metal armor) between pipes), the actual operation is difficult, and it cannot be disassembled after welding

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