Novel high-tungsten-content tungsten-boron cross-linked polyethylene composite shielding material
A cross-linked polyethylene and composite shielding technology, which is applied in shielding, reactors, nuclear engineering, etc., can solve the problems of unable to meet the requirements of volume reduction and weight reduction, poor environmental friendliness of lead, and low Vicat softening point, etc., to reduce installed capacity capacity, good environmental friendliness, and high nuclear radiation shielding efficiency
Active Publication Date: 2020-02-07
CHINA NUCLEAR POWER TECH RES INST CO LTD +3
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Problems solved by technology
In the existing technology, the traditional research and application of neutron and γ-ray shielding materials is mainly based on lead-boron polyethylene materials, but lead is not environmentally friendly, it is more harmful to the human body, and there is a "weak absorption zone".
At the same time, the existing lead-boron polyethylene shielding materials have poor heat resistance, low Vicat softening point (about 100°C), small molding size, and the thickness of existing plates is generally less than 100mm, which cannot meet the application of nuclear reactor miniaturization Requirements for volume reduction and weight reduction
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The following describes the novel composite shielding material of tungsten-boron cross-linked polyethylene with high tungsten content provided by the present invention.
[0017] The invention provides a new type of composite shielding material with high tungsten content tungsten-boron cross-linked polyethylene, its components include: tungsten powder 60-85%, boron carbide 1%-5%, cross-linked polyethylene 10- 40%, antioxidant 0.1-5%, coupling agent 0.5-2.5%.
[0018] Wherein, the density of the novel composite shielding material with high tungsten content tungsten-boron cross-linked polyethylene is 3.6-5.6g / cm3.
[0019] Specifically, the cross-linked polyethylene has a three-dimensional network structure, its particle size is 80-450 mesh, the particle size of the tungsten powder is 100-300 mesh, and the particle size of the boron carbide powder is 150-350 mesh.
[0020] The antioxidant is one or more combinations of Irganox1010, FB1520, 2002, PS802FL and Irgafos168.
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Abstract
The invention provides a novel high-tungsten-content tungsten-boron cross-linked polyethylene composite shielding material. The novel high-tungsten-content tungsten-boron cross-linked polyethylene composite shielding material comprises the following components in percent by mass: 60-85% of a tungsten powder, 1-5% of boron carbide, 10-40% of cross-linked polyethylene, 0.1-5% of an antioxidant, and0.5-2.5% of a coupling agent. The embodiment of the invention has the advantages of good safety, good heat resistance and corrosion resistance, can be made into a large size, and the like.
Description
technical field [0001] The invention relates to the technical field of nuclear radiation shielding protection, in particular to a novel composite shielding material of tungsten-boron cross-linked polyethylene with high tungsten content, which can be used for shielding protection of neutrons and gamma rays. Background technique [0002] Shielding materials are mainly used to block and weaken gamma rays and neutron radiation that are harmful to the human body, and are an effective means to ensure the safety of personnel, equipment and environmental radiation. It is mainly used for radiation protection in the field of nuclear power technology, and can also be used in other fields that require radiation protection, such as radiation protection in medical, nuclear physics laboratories and other fields or areas. [0003] Although the moderation and absorption of neutrons by nuclear radiation shielding materials and the attenuation of γ-rays are important indicators for evaluating ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G21F1/10B22F1/00C22C27/04
CPCG21F1/106C22C27/04C22C32/0094B22F1/102
Inventor 彭祥阳路广遥匡少宝侯硕魏旭东陈帅刘青松周建明戚进祥丁祥彬赵均李玉磊赵青
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD