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Electric penetration piece with radiation shielding structure

An electrical penetration and radiation shielding technology, which is applied in the field of electrical penetrations with radiation shielding structures, can solve the problems of limited shielding effect of ordinary stainless steel and reduce the biological shielding performance of containment concrete walls, etc., and achieve good radiation protection ability and radiation dose low effect

Active Publication Date: 2009-05-13
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cylinder assembly uses ordinary stainless steel with excellent mechanical properties and certain radiation shielding properties as the material of the end plate and support plate, due to the limited radiation shielding effect of ordinary stainless steel, it will also produce secondary gamma rays. secondary radiation, thus greatly reducing the bioshielding performance of the containment concrete walls

Method used

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  • Electric penetration piece with radiation shielding structure
  • Electric penetration piece with radiation shielding structure
  • Electric penetration piece with radiation shielding structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An electrical penetration with lead plate radiation shielding structure

[0026] Such as figure 1 , image 3 As shown, the electrical penetrating part of the present invention consists of a cylinder body 11, flanges 13 encapsulating the two ends of the cylinder body 11, the conductor assembly 7 and the grounding conductor 12 encapsulated in the cavity of the cylinder body 11 by the flange 13, in the cavity of the cylinder body 11 In the body, the supporting partition 6 is welded vertically on the inner wall of the cylinder along the axial direction of the cylinder and penetrated by the conductor assembly 7 and the grounding conductor 12, and is fixed on the supporting partition 6 and is simultaneously connected by the conductor assembly 7 and the grounding conductor 12. It is composed of the matching lead plate 1 through which the axis extends; wherein, the lead joints 14 at both ends of the conductor assembly 7 are respectively fixed on the disk surface of the flange ...

Embodiment 2

[0031] An electrical penetration with radiation shielding structure of high boron stainless steel plate

[0032] Such as figure 2 , Figure 4 As shown, the electrical penetrating part of the present invention consists of a cylinder body 11, flanges 13 encapsulating the two ends of the cylinder body 11, the conductor assembly 7 and the grounding conductor 12 encapsulated in the cavity of the cylinder body 11 by the flange 13, in the cavity of the cylinder body 11 The body is composed of high-boron stainless steel plates welded vertically on the inner wall of the cylinder along the axial direction of the cylinder and penetrated by the conductor assembly 7 and the grounding conductor 12; wherein, the lead joints 14 at both ends of the conductor assembly 7 are respectively fixed on the flanges at both ends On the disk surface of flange 13, the two ends of the grounding conductor 12 pass through the disk surface of flange 13.

[0033] There is only one piece of high-boron stainles...

Embodiment 3

[0037] A high boron stainless steel plate radiation shielding structural electrical penetration with metal compound coating

[0038] The structure of the electrical penetration part of this embodiment is basically the same as that of Example 2, the difference is that B4C, WC, FeNiB, TiC, iron-nickel, which have the functions of relieving thermal stress and enhancing shielding, are prepared on the surface of high-boron stainless steel by thermal spraying technology. Any coating of aluminum metal compound makes high boron stainless steel have better mechanical properties and radiation shielding properties. The high-boron stainless steel with the sprayed layer is used to process the same structure as the support partition, which replaces the support partition on the traditional penetrating piece, and plays the functions of support and radiation shielding at the same time.

[0039] The radiation shielding structure of the electrical penetrations in the above embodiments can effect...

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Abstract

The invention discloses an electrical penetration assembly with a radiation shielding structure. The electrical penetration assembly mainly consists of a cylinder body, flanges which encapsulate two ends of the cylinder body, a conductor component which is encapsulated in the cylinder body, and an earthing conductor; wherein, a radiation division plate is vertically arranged along the axial direction of the cylinder body in the cylinder body, the conductor component encapsulated in the cylinder body and the earthing conductor penetrate the radiation division plate, and ends at two sides of the conductor component and the earthing conductor extend out of the flanges at the two ends of the cylinder body. The radiation division plate can be a lead plate fixed on a support division plate, or a high boron stainless steel plate welded on the inner wall of the cylinder body, or the high boron stainless steel plate produced with any one of coatings which are B4C, WC, FeNiB, TiC and iron-nickel-aluminum metallic compounds on the surface. The electrical penetration assembly has the outstanding advantages of simple structure, convenient assembly, lower cost and high radiation resistant capability, and can form a complete reactor radiation shielding system with a reactor safety containment, thus effectively shielding reactor radiation of nuclear reactors.

Description

technical field [0001] The invention relates to an electrical penetrating piece, in particular to an electrical penetrating piece with a radiation shielding structure which is installed on the safety shell of a nuclear reactor and can fully prevent the radiation material in the reactor from overflowing. Background technique [0002] As the last of the "three barriers" of the nuclear reactor, the containment is the most important safety barrier. One of its main functions is to serve as a biological shield to prevent the radioactive substances (mainly gamma rays) in the nuclear power plant from leaking into the surrounding environment. go. The electrical penetration is a special electrical equipment installed on the containment to realize various cables passing through the wall. The cylinder of the penetration is installed in the pre-buried pipeline on the containment, and the penetration is assembled on the safety shell through the connecting flange and welding process. Toge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C13/02G21C11/02
CPCY02E30/40Y02E30/30
Inventor 罗志远王广金周天郑兰疆
Owner NUCLEAR POWER INSTITUTE OF CHINA
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