A Novel Glass or Ceramic Sintered Electrical Penetration for Double Containment Vessels

Abstract

The invention provides a novel glass or ceramic sintered electrical penetration assembly for a double-layered secure shell. The novel glass or ceramic sintered electrical penetration assembly comprises a penetration assembly barrel body, wherein penetration assembly end flanges are welded at the two ends of the penetration assembly barrel body in a sealed manner; terminal boxes are arranged on the outer sides of the penetration assembly end flanges; a stainless steel sealing pipe is arranged in the penetration assembly barrel body and the two ends of the stainless steel sealing pipe and the penetration assembly end flanges are sealed by clamping sleeves; the stainless steel sealing pipe is internally provided with a feed through line conductor; the stainless steel sealing pipe and the feed through line conductor are sintered by glass / ceramic and are sealed by welding. According to the device provided by the invention, the disadvantages of the prior art are overcome; glass or ceramic sintering sealing is used for replacing organic sealing so that the novel glass or ceramic sintered electrical penetration assembly has good irradiation resistance, high temperature resistance and pressure bearing, has good sealing performance, good insulativity and good safety, and has strong maneuverability; the novel glass or ceramic sintered electrical penetration assembly is convenient to manufacture, mount and replace.

Description

technical field [0001] The invention relates to a novel glass or ceramic sintered electrical penetrating piece for a double-layer containment vessel, and belongs to the technical field of sealing penetrating pieces for nuclear power plant containment vessels. Background technique [0002] In nuclear power plants, in order to ensure the transmission of electrical equipment power supply, control, protection, nuclear measurement, lighting, instrumentation, communication and other signals in the reactor containment, the cables are required to penetrate the special airtight containment, and the electrical penetration is to achieve this. It is a device for connecting cables inside and outside the containment. [0003] The feedthrough lines of the existing electrical penetrations are usually in the form of swaging seals. That is, the stainless steel sealing tube of the feedthrough is swaged to make it form a good seal with the organic insulating material inside the tube. At the sa...

AI Technical Summary

Problems solved by technology

Since the softening points of organic materials such as polysulfone (169°C) and polyether ether ketone (143°C) are mostly below 200°C, the environment of higher accident temperature and pressure will reduce the insulation, radiation resistance and The decline in mechanical strength reduces the reliability of the swaging seal between the stainless steel sealing tube and the conductor, which leads to a reduction in the long-term sealing reliability of the penetrating part made of this traditional swaging seal under the high temperature condition of the containment of the nuclear power plant

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