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Neutron shielding material and preparation method thereof

A technology of shielding materials and neutrons, which is applied in the field of neutron shielding materials and its preparation, can solve the problems of poor thermal conductivity and flame retardancy, unsuitable pouring, poor molding performance, etc., achieve good flame retardancy, accelerate solidification speed, The effect of less pores

Active Publication Date: 2018-07-27
CHINA NUCLEAR POWER TECH RES INST CO LTD +3
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Problems solved by technology

[0004] The purpose of the present invention is to provide a neutron shielding material and its preparation method to overcome the problems of poor thermal conductivity and flame retardancy, poor molding performance, poor viscosity, and unsuitability for pouring.

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  • Neutron shielding material and preparation method thereof
  • Neutron shielding material and preparation method thereof
  • Neutron shielding material and preparation method thereof

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preparation example Construction

[0023] A preparation method for preparing the above-mentioned neutron shielding material comprises the following steps:

[0024] (1) Carry out vacuum mixing with epoxy resin and some flame retardants, the vacuum mixing time depends on the specific situation and selects a specific value from 10-30min;

[0025] (2) Add another part of flame retardant, density increasing agent, neutron absorber in (1), and carry out described vacuum mixing and defoaming treatment, defoaming treatment time, mixing temperature are from 2-5h respectively, Choose a specific value from 30-50°C depending on the specific situation;

[0026] (3) Add curing agent in (2) and carry out vacuum mixing and make mixture;

[0027] (4) the mixture in (3) is poured into a vacuum mold;

[0028] (5) After (4), put the vacuum mold into an oven for curing treatment. The curing temperature and curing time are respectively selected from 30-50°C and 24-28h according to the actual situation.

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Abstract

The invention provides a neutron shielding material and a preparation method thereof. The material is prepared from, by weight, 80-120 parts of epoxy resin, 1-90 parts of curing agent, 130-180 parts of flame retardant, 5-20 parts of density increasing agent and 1-5 parts of neutron absorber, wherein the median particle diameter of the flame retardant is 0.5-30 micrometers, and the median particlediameter of the density increasing agent is-10 micrometers. The neutron shielding material and the preparation method thereof have the advantages that by changing the median particle diameter of the flame retardant and density increasing agent, gas is prevented from being entrained during a casting process, a curing temperature and curing time are controlled, the solidification speed of the mixedsystem is accelerated, the solidification effect is improved, it is ensured that the neutron shielding material has good flame retardance, thermal conductivity, mechanical properties, few internal airholes and other excellent proprties, thereby solving the problems that the thermal conductivity and flame retardance of existing neutron shielding materials are poor, the formability is poor, the viscosity is not good and the materials are unsuitable for casing the like, and improving the shielding effect on neutron radiation.

Description

technical field [0001] The invention relates to materials for shielding spent fuel produced by nuclear power plants, in particular to a neutron shielding material and a preparation method thereof. Background technique [0002] Neutrons are one of the basic particles that make up the atomic nucleus. They are not charged, but because of their high speed, they can ionize matter and produce radioactive radiation. They are widely used in national defense, scientific research, radiotherapy and detection. Neutrons are indispensable in the use of nuclear fission to develop nuclear power, providing a large amount of clean energy for mankind. However, a large number of secondary particles generated by neutron ionization interact with tissue cells, causing great harm to human health. At the same time, neutron irradiation can cause point defects and dislocations inside the material, degrading the material properties. After the Fukushima nuclear accident in Japan, the safety of nuclear ...

Claims

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Application Information

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IPC IPC(8): G21F1/10
CPCG21F1/103G21F1/106
Inventor 路广遥周建明马庆俊田陆赵月扬郭瑶仙陈帅沈海丰侯硕童赫
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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