Preparation method for ultra-thin neutron radiation preventive composite shielding material

Abstract

The invention discloses an ultra-thin neutron radiation preventive composite shielding material and a preparation method thereof. A hydrogen-rich compound is used as a base material, a baron-containing compound is used as a neutron absorber, a small quantity of function auxiliaries are added, and the ultra-thin neutron radiation preventive composite shielding material is prepared at a certain temperature or under pressure conditions by processing technologies including quantitative weighing, heating and mixing, high-temperature mould pressing and sizing, and the like. The preparation process is simple, operation is convenient, and the prepared ultra-thin neutron radiation preventive shielding material has the advantages of thinness, high baron content and fine shielding performance, and is widely applied to the field of neutron radiation protection and research in various places such as nuclear power plants, isotope radiation sources, accelerators, medical neutron treatment equipment and radiation laboratories.

Description

Technical field [0001] The invention relates to the technical field of preparation of nuclear radiation shielding materials, in particular to an ultra-thin anti-neutron radiation composite shielding material and a preparation method thereof. Background technique [0002] With the development of nuclear technology, neutron and neutron source technology have been widely used in nuclear energy, nuclear weapons, material flaw detection, well logging, agricultural breeding, medical diagnosis and other fields, and occupy an important position in national defense and industrial production. However, since neutrons have no charge, they are not affected by the atomic electric field when interacting with matter, but directly interact with the nucleus, so they have strong penetrability, making them harmful to the human body, equipment, and the environment. Very serious radiation damage threatens the safety of personnel and the normal operation of instruments. Therefore, good shielding a...

AI Technical Summary

Problems solved by technology

Among them, the type of cement-based shielding material shielding neutrons is relatively simple and is mostly used for large-scale protective devices. The material molding process and construction conditions have high requirements, and the application field has certain limitations; in addition, more commonly used It is a boron or lead-boron compound. The molding process of this type of compound is relatively simple, and the formed material has better processing performance, but the finished product is mostly a larger-sized plate or product.

With the application and development of neutron technology, different occasions have put forward different requirements for neutron shielding materials, and the diversification of product size and volume can bring a wider range of applications for shielding materials. 10 The natural abundance of B is only 19.9%. If you want to ensure efficient neutron absorption, you can only increase the amount of neutron absorbers (boron and its compounds) as much as possible. The increase in the content of neutron absorbers can improve the shielding performance of the material. It meets the needs of more fields, but when the inorganic filler reaches a certain proportion, it will bring great difficulties to the molding process. Therefore, preparing an ultra-high filling, ultra-thin shielding material for neutron radiation protection is currently in this technical field. Issues urgently needed to be studied

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