Electric penetrating piece for high-temperature gas cooled reactor nuclear power pressure container and processing method thereof

Abstract

The invention discloses an electric penetrating piece for a high-temperature gas cooled reactor nuclear power pressure container and a processing method thereof. The left side of a flange assembly is provided with a pressing plate and a pressing device, the right end face of a pressing ring is sequentially and tightly provided with a front insulator, a tapered sealing ring and a rear insulator along the axial direction of a conductor; the pressing device is screwed to ensure that a pre-locking force of a low-pressure end is transmitted to the tapered sealing ring, the external diameter of the tapered sealing ring is expanded and the internal diameter of the tapered sealing ring is reduced, the external diameter and the internal diameter of the tapered sealing ring are respectively attached on the inner wall of the flange assembly and the excircle surface of the conductor; and the pressing device is continuously screwed to ensure that pressure in the container is increased, and an axial force to the low-pressure end is generated to continuously press the tapered sealing ring. A structure of the electric penetrating piece connected with the pressure container is compact, thus completeness, insulation and airtightness of pressure boundary of the pressure container are ensured, helium in the pressure container is prevented from leaking, and the requirement on high-temperature gas cooled reactor nuclear power is met under the conditions of helium medium, high temperature, high pressure and large current.

Description

technical field [0001] The invention relates to an electrical conductor with insulation, which is applied to a pressure vessel in a high-temperature gas-cooled reactor nuclear power plant to realize the conductive connection between the inside of the pressure vessel and the outside. Background technique [0002] An electrical penetration is generally a device consisting of a conductor, seal, and opening that provides a pathway for electrical connection. Ordinary electrical penetrating parts are just to pass the conductor through the jacket and fix the jacket on the housing. The implemented structure is simple and the connection is convenient. However, when electrical penetrations are used in the special field of nuclear power plants, they also serve as a part of the containment of important components of nuclear power plants, constituting a safety barrier to prevent the leakage of radioactive materials, and provide power or communication for equipment and facilities inside a...

AI Technical Summary

Problems solved by technology

At present, the electrical penetrations used in the pressure vessels of high-temperature gas-cooled reactor nuclear power plants all have the problems of poor insulation performance and weak pressure bearing capacity.

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