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Neutron shielding material and manufacturing method thereof

A technology of shielding material and manufacturing method, applied in shielding, manufacturing tools, reactors, etc., can solve the problems of slow molding speed, high cost, complicated process, etc., and achieve the effect of good neutron shielding ability, low cost and simple process

Inactive Publication Date: 2013-05-29
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional neutron shielding materials include boron-containing polyethylene (reference: Zhu Guangning et al. Xi'an pulse reactor neutron photography shield. Atomic Energy Science and Technology, Vol.40, No.5sep.2006), boron-containing cement, tungsten alloy (reference Literature: Wu Wensheng. Neutron shielding research of neutron gamma logging tool. Nuclear electronics and detection technology, Vol.24, No.1 Jan.2004), etc., newly developed zirconium borohydride (Zr(BH4)4) and zirconium hydride (ZrH2) (reference: T.Hayashi, Journal of Nuclear Materials 386-388 (2009) 119-121), etc., these materials have a good shielding effect on neutrons, but they have high cost and slow molding speed. , complex process and other issues

Method used

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  • Neutron shielding material and manufacturing method thereof
  • Neutron shielding material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1 Mix borax and sodium fluorosilicate mixture in parts by weight of 100:5; wherein, the ratio of parts by weight of borax, water glass and sodium fluorosilicate is 100:50:5;

[0023] 2 Dilute the water glass with water, the ratio of water is 1 / 10 to 1 / 15 of the water glass quality. A larger water ratio is good for stirring, but it will reduce the adhesive performance, and a dilution ratio of 1:10 is selected as a better balance point.

[0024] 3 Slowly add the diluted water glass to the mixture of borax and sodium fluorosilicate, and stir quickly.

[0025] 4 Add the well-stirred mixture into the pressing mold, extrude it, and use it after demoulding.

[0026] The initial setting time of the shielding material is 5-30 minutes (varies with the curing dose), the complete curing time is about 6-24 hours, and the curing temperature is room temperature.

Embodiment 2

[0028] 1 Mixing borax and sodium fluorosilicate mixture in parts by weight of 100:6; wherein, the ratio of parts by weight of borax, water glass and sodium fluorosilicate is 100:60:6;

[0029] 2 Dilute the water glass with water, the ratio of water is 1 / 12 of the water glass quality. A larger proportion of water facilitates stirring, but reduces adhesive properties.

[0030] 3 Slowly add the diluted water glass to the mixture of borax and sodium fluorosilicate, and stir quickly.

[0031] 4 Add the well-stirred mixture into the pressing mold, extrude it, and use it after demoulding.

[0032] The initial setting time of the shielding material is 5-30 minutes (varies with the curing dose), the complete curing time is about 6-24 hours, and the curing temperature is room temperature.

Embodiment 3

[0034] 1 Mix borax and sodium fluorosilicate mixture in parts by weight of 100:15; wherein, the ratio of parts by weight of borax, water glass and sodium fluorosilicate is 100:70:15;

[0035] 2 Dilute the water glass with water, the ratio of water is 1 / 15 of the water glass quality.

[0036] 3 Slowly add the diluted water glass to the mixture of borax and sodium fluorosilicate, and stir quickly.

[0037] 4 Add the well-stirred mixture into the pressing mold, extrude it, and use it after demoulding.

[0038] The initial setting time of the shielding material is 5-30 minutes (varies with the curing dose), the complete curing time is about 6-24 hours, and the curing temperature is room temperature.

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Abstract

The invention discloses a neutron shielding material and a manufacturing method thereof, belonging to the field of neutron shielding. The neutron shielding material provided by the invention comprises sodium borate, sodium silicate and sodium fluosilicate, wherein the proportion by weight parts of the sodium borate, the sodium silicate and the sodium fluosilicate is 100:m:n, the value of m is 50-70, and the value of n is 5-15. The method provided by the invention comprises the following steps of: 1) taking predetermined parts of sodium borate, sodium silicate and sodium fluosilicate, wherein the proportion by weight parts of sodium borate, sodium silicate and sodium fluosilicate is 100:m:n, the value of m is 50-70, and the value of n is 5-15; 2) adding water to dilute the sodium silicate,then, adding the diluted sodium silicate into the mixture of the sodium borate and the sodium fluosilicate, and mixing uniformly; and 3) adding the uniformly mixed mixture into a press mould, performing extrusion molding, and then demoulding. The material provided by the invention is excellent in neutron shielding capability, controllable in moulding speed, simple in technology and low in cost, and has certain mechanical strength.

Description

technical field [0001] The invention belongs to the field of neutron protection, relates to a neutron shielding material and a manufacturing method thereof, aiming at neutron shielding in a wide energy range from fast neutrons to thermal neutrons. Background technique [0002] Neutrons are one of the nuclei that make up the nucleus. They have no charge. When interacting with matter, they are not affected by the electric field of the atom, but directly interact with the nucleus. Therefore, they have stronger radiation compared with X-rays and γ-rays. penetration. Neutrons play a huge role in nuclear energy, nuclear weapons, material flaw detection, well logging, activation analysis, etc., and play an important role in national defense and industrial production. However, due to the strong penetrability of neutrons, it will cause strong radiation damage to the human body, the environment, equipment, etc., threatening the safety of life and the normal operation of instruments, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F1/02B28B1/14
Inventor 李航邹宇斌温伟伟王胜唐国有
Owner PEKING UNIV
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