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Thermocouple wire glass sintering sealing technology used for in-core instrument

A technology of thermocouple wire and glass sintering, which is used in nuclear engineering, reactors, nuclear power generation, etc., can solve problems such as no longer applicable, sealant failure, etc., and achieve the effect of high insulation resistance and high radiation resistance requirements.

Pending Publication Date: 2018-02-09
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, under the harsh environmental conditions such as high temperature, high humidity, and high radiation in the containment of nuclear power plants, and the ultra-long design life of 60 years, the sealant has a greater possibility of failure, and the conventional glue sealing method will no longer be applicable.

Method used

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  • Thermocouple wire glass sintering sealing technology used for in-core instrument

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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, the embodiment of the present invention provides a thermocouple wire glass sintering and sealing process for core instrumentation, which includes:

[0022] Serving Glass Cake 2;

[0023] The glass cake 2 is contacted with the nichrome-nickel contact pieces (3,4) and the connector housing 1;

[0024] heating the glass cake 2, so that the melt of the glass cake 2 achieves good wetting and close contact with the surface of the nickel-chromium-nickel-aluminum contact pieces (3, 4) and the connector housing 1;

[0025] Allow the melt of the glass cake 2, the nickel-chromium-nickel-aluminum contacts (3, 4) and the connector housing 1 to cool to room temperature, so that the glass cake 2 and the nickel...

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Abstract

The invention provides a thermocouple wire glass sintering sealing technology used for an in-core instrument. The technology comprises the following steps: providing a glass cake; and assembling the glass cake and a nickel chromium-nickel aluminum contact and a connector housing; using heating equipment for heating an assembly body formed by the glass cake, the nickel chromium-nickel aluminum contact, and the connector housing so that a melt of the glass cake is contacted with the surface of the nickel chromium-nickel aluminum contact and the connector housing; cooling the melt of the glass cake, the nickel chromium-nickel aluminum contact and the connector housing to room temperature, and respectively connecting the glass cake with the nickel chromium-nickel aluminum contact and the connector housing. According to the thermocouple wire glass sintering sealing technology used for the in-core instrument, through a glass sintering technology, tight combination of the glass cake and the nickel chromium-nickel aluminum contact and the inner wall of the connector housing is realized, an individually vertical sealing purpose of a connector is realized, and penetration of moisture into the connector assembly can be avoided.

Description

technical field [0001] The invention relates to a thermocouple wire glass sintering and sealing process for reactor core instruments. Background technique [0002] The core instrumentation system uses a nickel-chromium-nickel-aluminum thermocouple to transmit the core outlet temperature signal, and the signal transmission between the nickel-chromium-nickel-aluminum thermocouple and the core instrumentation is realized through a mineral insulated cable electrical connector. In order to ensure the accuracy of signal transmission, the contact material used in the connector is the same as that of the nickel-chromium-nickel-aluminum thermocouple, that is, both are nickel-chromium-nickel-aluminum thermocouple wires. [0003] Mineral insulated cables with connector terminals ( figure 1 The left end) can realize the sealed connection of the tail of the connector by a certain method (such as welding the sealing sleeve at the terminal). However, due to the fact that the mineral insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C21/00C03C8/24
CPCG21C21/00C03C8/24Y02E30/30
Inventor 匡红波牛志军陶果江浪汤振薛泓元薛欢欢时兴波
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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