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Diffusively filled composite insulating layer for nuclear class equipment and pipelines

An insulation layer and equipment technology, applied in pipeline protection, insulation, mechanical equipment, etc., can solve the problems of poor high temperature resistance and short service life, achieve stable chemical and physical properties, reduce radiation heat transfer and metal contact heat transfer Heat, improve the effect of thermal insulation effect

Active Publication Date: 2019-02-01
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the composite metal insulation layer with radiation shielding function in the prior art is made of organic materials, which has poor high temperature resistance, short service life and needs to be replaced regularly. The present invention provides a solution to the above problems Dispersion-filled composite insulation layer for nuclear-grade equipment and pipelines

Method used

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  • Diffusively filled composite insulating layer for nuclear class equipment and pipelines
  • Diffusively filled composite insulating layer for nuclear class equipment and pipelines
  • Diffusively filled composite insulating layer for nuclear class equipment and pipelines

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Embodiment

[0023] Such as figure 1 As shown, the composite metal insulation layer of the present invention is composed of an insulation outer box and an inner gamma shielding layer 4, an outer gamma shielding layer 6, boron carbide powder 5, and a metal reflective foil 7 packed inside the insulation outer box. The filling order of each part on the thickness section is as follows: the inner shell plate of the thermal insulation outer box 1, the inner gamma shielding layer 4, the multi-layer metal reflective foil 7, the boron carbide powder 5, the outer gamma shielding layer 2, the outer insulation layer The shell plate 3 of the box, wherein the boron carbide powder 5 is evenly dispersed in the cavity between two adjacent layers of metal reflective foils 7 . The overall shape of this composite metal insulation layer with shielding function can be made into a flat plate, a circular tube, or a spherical shape according to the shape of the equipment surface. Its high temperature range can gen...

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Abstract

The invention discloses a diffusively filled composite insulating layer for nuclear class equipment and pipelines. The diffusively filled composite insulating layer for nuclear class equipment and pipelines comprises an insulating outer box, inside and outside gamma shielding layers filling the insulating outer box, boron carbide powder and metal reflective foils. The inside and outside gamma shielding layers are made from an inorganic shielding material with metal characteristics; the filling sequence on the thickness section of the insulting layer is as follows: an inner shell plate of the insulating outer box, the inside gamma shielding layer, the metal reflective foils, the outer gamma shielding layer and an outer shell plate of the insulating outer box, and the boron carbide powder isuniformly diffused in a cavity between two adjacent metal reflective foils; the metal reflective foils are of forward and backward cone bump wave shapes which are regularly arranged in a spaced manner vertically and transversely, and the two adjacent metal reflective foils are stacked in a backward staggered manner as the vertexes of the forward and backward cone bumps are opposite. The inventionprovides the compound metal insulating layer which not only has an insulating and heat-isolating function, but also has a radiation shielding function, and the compound metal insulating layer can serve in a high-temperature radiation environment for a long time without being replaced.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a dispersion-filled composite thermal insulation layer for nuclear-grade equipment and pipelines. Background technique [0002] When the nuclear reactor is in normal operation, high-temperature, high-pressure, and high-radioactive cooling medium flows inside the primary equipment and pipelines of the nuclear reactor. It is necessary to install an insulation layer on the outer surface of the equipment and pipelines to reduce heat loss. Shielding materials are installed outside the equipment and pipelines to reduce the radiation dose around the equipment, which is helpful for personnel's inspection and maintenance during service. At present, the first-level equipment and the outside of the pipeline of the nuclear reactor coolant system usually use a metal insulation layer, but this metal insulation layer only has the function of heat preservation and heat insulation, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/02F16L59/08F16L59/12G21F1/12
CPCF16L59/029F16L59/08F16L59/12G21F1/125
Inventor 周高斌邱天罗英谢国福王小彬李玉光邱阳杨志海张亚斌马姝丽杨敏陈海波杨立才董元元王昫心曾鹏
Owner NUCLEAR POWER INSTITUTE OF CHINA
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