A high-temperature gas-cooled reactor low-voltage control type electrical penetration and its preparation method

Abstract

The invention relates to a high-temperature gas-cooled reactor low-pressure controlled type electrical penetration assembly and a preparation method thereof, and belongs to the technical field of nuclear reactors. The high-temperature gas-cooled reactor low-pressure controlled type electrical penetration assembly consists of a stainless steel metal flange, a kovar bushing, an outer porcelain pipe, a lower kovar cap, an inner porcelain pipe, an upper kovar cap and a kovar guide pin. The preparation method specifically comprises: firstly, performing molybdenum-manganese metallization on sealing parts of the outer porcelain pipe and the inner porcelain pipe, then assembling the outer porcelain pipe and the inner porcelain pipe after metallization with the lower kovar cap, the upper kovar cap, the kovar bushing, the kovar guide pin and the stainless steel metal flange; and placing the assembled components into a graphite fixture, and performing vacuum brazing at a certain temperature and under a vacuum condition, thereby preparing the high-temperature gas-cooled reactor low-pressure controlled type electrical penetration assembly.

Description

technical field [0001] The invention relates to a high-temperature gas-cooled reactor low-voltage control type electrical penetration and a preparation method thereof, belonging to the technical field of nuclear reactors. Background technique [0002] The high-temperature gas-cooled reactor uses helium as the coolant, graphite as the moderator material, and uses coated granular fuel and all-ceramic core structure materials. The pressure boundary of the primary loop of a high temperature gas-cooled reactor is composed of the reactor pressure vessel, the steam generator pressure casing and the hot gas conduit pressure casing. The use of electrical penetrations in the primary loop is a necessary and effective measure to prevent the radioactive gas from the reactor from leaking to the environment. one of the ways. [0003] Since the sealing medium in the primary circuit of the high-temperature gas-cooled reactor is high-temperature, high-pressure pure helium, and the design of ...

AI Technical Summary

Problems solved by technology

Chinese patent literature discloses a cermet sintered high-temperature and high-pressure electrical penetration (application number CN201310282770.5), but it is not suitable for high-temperature gas-cooled reactor low-voltage control type electrical penetrations

Commonly used penetrating parts only separate the guide pin from the substrate by a layer of organic insulating material. In the case of high air humidity and dusty insulating material, it will cause leakage conduction current and even creepage on the surface of the insulating material.

These will cause interference to the control transmission signals inside and outside the reactor, which will easily lead to potential safety hazards

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