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Flexible shielding material and preparation method thereof

A shielding material and flexible technology, applied in the field of preparation of nuclear radiation shielding materials, can solve the problems of shielding performance, such as mechanical properties, heat resistance, and radiation resistance, which are difficult to take into account, affect radiation resistance, and lead skin is easily polluted. , to achieve the effect of excellent shielding performance, small footprint, and reduced disposal costs

Inactive Publication Date: 2015-12-16
GUANGDONG NUCLEAR POWER JOINT VENTURE +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single traditional shielding material is difficult to meet all protection requirements. Taking the traditional lead sheet as an example, as a shielding body, it will cause rheology when suspended for a long time, which will affect the radiation resistance performance, and the lead sheet itself is easily polluted, which is not conducive to secondary protection. However, many existing composite radiation shielding materials are difficult to meet the requirements of radiation protection for its comprehensive performance, mainly in the shielding performance of radiation shielding materials and other properties such as mechanical properties, heat resistance, and radiation resistance. etc. difficult to balance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A flexible shielding material, which is a laminated sandwich structure, including a shielding function layer and protective layers arranged on both sides of the shielding function layer, wherein the shielding function layer is rubber with radiation resistance and neutron-absorbing and A composite layer of gamma-ray metal powder kneading, wherein the thickness of a single layer of the protective layer is 1mm, the thickness of the shielding functional layer is 10mm, and the thickness of the flexible shielding material is 12mm.

[0031] Wherein by mass percentage, the shielding functional layer includes fumed silica 5%, methyl vinyl silicone rubber 15%, metal powder 78% and auxiliary agent 2%; auxiliary agent includes coupling agent, hydroxyl silicone oil and vulcanizing agent; protection The layer includes fumed silica, coupling agent, hydroxyl silicone oil, rubber substrate and vulcanizing agent, and the metal powder is lead powder, the vinyl content in methyl vinyl silic...

Embodiment 2

[0046] A flexible shielding material, which is a laminated sandwich structure, including a shielding function layer and protective layers arranged on both sides of the shielding function layer, wherein the shielding function layer is rubber with radiation resistance and neutron-absorbing and The metal powder kneaded composite layer of gamma rays, wherein the single layer thickness of the protective layer is 0.4mm, the thickness of the shielding functional layer is 15mm, and the thickness of the flexible shielding material is 15.8mm.

[0047] Among them, by mass percentage, the shielding functional layer includes fumed silica 1%, methyl vinyl silicone rubber 8%, metal powder 90% and auxiliary agent 1%; auxiliary agent includes coupling agent, hydroxyl silicone oil and vulcanizing agent; protective The layer includes fumed silica, coupling agent, hydroxyl silicone oil, rubber substrate, vulcanizing agent and dyeing agent, the metal powder is decayed uranium powder, the rubber sub...

Embodiment 3

[0062] A flexible shielding material, which is a laminated sandwich structure, including a shielding function layer and protective layers arranged on both sides of the shielding function layer, wherein the shielding function layer is rubber with radiation resistance and neutron-absorbing and The metal powder kneaded composite layer of gamma ray, wherein the single layer thickness of the protective layer is 2mm, the thickness of the shielding functional layer is 20mm, and the thickness of the flexible shielding material is 24mm.

[0063] Among them, by mass percentage, the shielding functional layer includes fumed silica 10%, methyl vinyl silicone rubber 30%, metal powder 50% and auxiliary agent 10%; auxiliary agent includes coupling agent, hydroxyl silicone oil and vulcanizing agent; protective The layer includes fumed silica, coupling agent, hydroxyl silicone oil, rubber substrate, vulcanizing agent and dyeing agent; in addition, the metal powder is a mixture of decayed uraniu...

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Abstract

The invention relates to the technical field of preparation of nuclear radiation shielding materials, especially to a flexible shielding material which is used for shield radioactive parts of a nuclear power station. The shielding material is of a laminate structure and comprises a shielding function layer and protective layers arranged at two sides of the shielding function layer, wherein the shielding function layer is a compounded layer which utilizes irradiation-resistant rubber as a matrix material, absorption neutrons and gamma-ray metal powder are added in the matrix material, and the protective layers are rubber layers. The flexible shielding material is of a sandwich structure, can be applied on the occasion that a traditional radiation protection material cannot be used or is difficult to install, is convenient in on-site installation and later cleaning in a nuclear power station, does not suffer from creep deformation and flowing as a foreplate, can be repeatedly used for a long time and is environment-friendlier and more economic. Moreover, the invention also relates to a preparation method for the flexible shielding material.

Description

technical field [0001] The invention relates to the technical field of preparation of nuclear radiation shielding materials, in particular to a flexible anti-nuclear radiation shielding material and a preparation method thereof. Background technique [0002] The reactor is the core part of the nuclear energy system, in which nuclear fission (or fusion) will produce various radiation rays such as neutrons of different energy levels, gamma rays, secondary gamma rays and other charged particles and high-energy rays, which will bring harm to the human body. damage and damage the environment. In order to prevent or reduce the harm of radiation rays to people, radiation protection is required, and radiation protection mainly depends on the performance of radiation shielding materials and the optimal design of radiation shielding structures. Radiation shielding materials mainly refer to materials that have a shielding effect on ionizing radiation such as neutrons and γ-rays. Among...

Claims

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Application Information

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IPC IPC(8): B32B25/02B32B25/04B32B37/10C08L83/07C08L83/06C08K3/08C08K3/36
CPCB32B25/02B32B25/042B32B37/10B32B2250/248B32B2250/40B32B2264/105B32B2307/212B32B2307/3065B32B2307/714B32B2307/7265B32B2571/02C08L83/04C08L2205/02C08L83/06C08K3/36C08K3/08
Inventor 刘峰刘夏杰吕永红李坤锋黄文有
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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