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Gradient type macromolecule-based neutron absorption grid tray material and preparation method thereof

A polymer-based, neutron absorber technology, applied in chemical instruments and methods, layered products, lamination, etc., can solve the problems of insufficient neutron absorber function and narrow neutron energy spectrum absorption range, etc., to achieve Improving mechanical properties, ensuring safety, and ensuring the effect of absorption efficiency

Active Publication Date: 2014-12-24
ZHONGXING ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the problems of insufficient neutron absorber function and narrow neutron energy spectrum absorption range, the present invention provides a gradient polymer-based neutron absorption grid material

Method used

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  • Gradient type macromolecule-based neutron absorption grid tray material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of gradient polymer-based neutron-absorbing grid material comprises the following steps:

[0033] a. First, heat the polyimide resin at 80°C to make the resin have good fluidity. By adding the organic solvent acetone into the polyimide resin and fully stirring it at 60°C, according to the thermosetting The viscosity of the polymer resin is large, and the thermosetting polymer resin is diluted (if the thermosetting polymer resin used has a low viscosity, there is no need to dilute it with a solvent), and the diluted polyimide glue is obtained for use;

[0034] b. Divide the glue solution into three parts, and then add lithium fluoride, samarium oxide and gadolinium oxide respectively to the diluted thermosetting glue solution to prepare functional glue solutions containing absorbent fillers with different neutron absorbers;

[0035] c. Irradiate the carbon fiber used under the irradiation dose of 120kGy to improve the bonding strength between the f...

Embodiment 2

[0039] The preparation method of gradient polymer-based neutron-absorbing grid material comprises the following steps:

[0040] a. First mix the bisphenol-A epoxy resin with the anhydride curing agent, the ratio is 1:1, so that the resin has good fluidity, then pour the imidazole accelerator, and stir fully to obtain a uniformly mixed epoxy resin Glue;

[0041] b. Divide the glue solution into three parts, and then add lithium fluoride, samarium oxide and gadolinium oxide respectively to the epoxy resin glue solution to prepare functional glue solutions containing absorbent fillers with different neutron absorbers;

[0042] c. Use a silane coupling agent to couple the surface of the glass fiber to improve the bonding strength between the fiber surface and the resin matrix;

[0043] d. Cut the glass fiber after coupling treatment into required size and impregnate the mixed glue, arrange the materials in the order of lithium fluoride layer, samarium oxide layer and gadolinium o...

Embodiment 3

[0046] The preparation method of gradient polymer-based neutron-absorbing grid material comprises the following steps:

[0047] a. First, heat the polyimide resin at 80-90°C to make the resin have good fluidity. Add organic solvent acetone to the polyimide resin, and fully Stir, and dilute the thermosetting polymer resin according to the viscosity of the thermosetting polymer resin to obtain the diluted polyimide glue for later use;

[0048] b. Divide the glue solution into three parts, and then add lithium hydride, cadmium oxide and gadolinium oxide respectively to the diluted thermosetting glue solution to prepare functional glue solutions containing absorbent fillers with different neutron absorbers;

[0049]c. Irradiate the continuous glass fiber used at a radiation dose of 120kGy to improve the bonding strength between the fiber surface and the resin matrix;

[0050] d. After impregnating the treated reinforcing fibers with different absorber glues, arrange the materials...

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Abstract

The invention discloses a gradient type macromolecule-based neutron absorption grid tray material which comprises a fast neutron slow absorption layer, an intermediate energy neutron absorption layer and a heat neutron absorption layer, wherein the three absorption layers are formed by gradient lamination; a neutron absorption body material doped in the fast neutron slow absorption layer is a lithium fluoride, lithium hydride or boron carbide absorption body material; a neutron absorption body material doped in the intermediate energy neutron absorption layer is a samarium oxide neutron absorption body material; a neutron absorption body material doped in the heat neutron absorption layer is a gadolinium oxide or cadmium oxide neutron absorption body material. The invention also discloses a preparation method of the gradient type macromolecule-based neutron absorption grid tray material. The gradient type macromolecule-based neutron absorption grid tray material has the characteristics of high absorption efficiency, long service life, high mechanical property, simple technology and the like, has a certain absorption effect on gamma photons, can be used for spent fuel storage and neutron sources of other types and has a wide application prospect.

Description

technical field [0001] The invention relates to a graded polymer-based neutron-absorbing grating material. [0002] The invention also relates to a preparation method of gradient polymer-based neutron-absorbing grid material. It is mainly used in the fields of spent fuel grid material and neutron protection. Background technique [0003] my country is currently the country with the largest number of nuclear power units under construction in the world. According to the Medium and Long-Term Development Plan for Nuclear Power promulgated in 2007, by 2020, my country's nuclear power installed capacity will reach 40 million kilowatts (after adjustment, the target is 80 million kilowatts. ). According to the International Atomic Energy Agency, a reactor with an installed capacity of 1,000 megawatts will generate about 33 tons of nuclear waste every year. Therefore, it is estimated that my country will unload nearly 1,000 tons of spent fuel every year. The storage and processing...

Claims

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Application Information

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IPC IPC(8): B32B27/18B32B27/06B32B27/38B32B37/02C08L79/08C08L63/00C08K13/06C08K9/00C08K9/06C08K7/06C08K3/22
Inventor 仇云龙汪涛汤晓斌
Owner ZHONGXING ENERGY EQUIP
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