High-temperature gas cooled reactor primary helium circulator electrical penetration assembly and machining method thereof

Abstract

The invention relates to a high-temperature gas cooled reactor primary helium circulator electrical penetration assembly and a machining method thereof. The problem that an existing electrical penetration assembly is poor in sealing performance and the like is solved. The electrical penetration assembly comprises a stainless steel body flange with a cavity. A plurality of through holes axially penetrating through the whole stainless steel body flange are formed in the stainless steel body flange. Conductor assemblies capable of extending out of the two ends of the stainless steel body flange are formed in the through holes in a penetrating mode respectively. Each conductor assembly comprises a metal transmission conductor made of a Kovar alloy material. A ceramic positioning sleeve is sintered on the circumferential outer surface of each metal transmission conductor and connected with the metal transmission conductor to form an integrated structure. The ceramic positioning sleeves are fixedly arranged in the through holes in a brazing mode. The electrical penetration assembly has the advantages of being simple in structure, having good mechanical performance and sealing performance, and being strong in insulating performance and bearing capacity, good in anti-seismic buffering effect, resistant to radiation and ageing, long in service life and high in stability.

Description

technical field [0001] The invention belongs to the technical field of electrical penetrating parts for nuclear reactors, in particular to an electrical penetrating part for a main helium fan of a high-temperature gas-cooled reactor and a processing method thereof. Background technique [0002] High-temperature gas-cooled reactor is an international fourth-generation reactor type independently developed by my country with independent intellectual property rights. With the support of the national "863" plan, my country has carried out research on 10MW high-temperature gas-cooled experimental reactor since the mid-1980s , development, high temperature gas-cooled reactor main helium fan electrical penetration is installed on the reactor pressure vessel as a part of the pressure vessel to prevent the leakage of reactor nuclear material and provide signals and power to the equipment in the reactor. The long-term use temperature is 150°C, the accident temperature is 250°C, the pres...

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Problems solved by technology

The organic materials currently on the market are difficult to meet the special requirements of reactor radiation resistance, high temperature resistance, and long life, which makes the existing electrical penetrations have the following disadvantages: poor stability, mechanical properties and sealing performance, insulation performance and pressure resistance Poor ability, poor radiation resistance, easy aging, short service life

[0004] The above solution solves the problem of poor structural strength of the existing electrical penetrations to a certain extent, but this solution still cannot fundamentally solve defects such as poor sealing, poor pressure bearing capacity, and poor stability, and is not resistant to radiation and is not Resistant to aging and difficult to process

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