Radiation-proof high-integrity container and preparation method thereof

Abstract

The invention relates to a radiation-proof high-integrity container and a preparation method thereof. The radiation-proof high-integrity container comprises an outer wall, a middle shielding layer andan inner wall, the outer wall and the inner wall are made of a material A, and the middle shielding layer is made of a material B, wherein the material A comprises the following components in parts by weight: 100 parts of a first thermoplastic polymer, 0.3-1.2 parts of a first antioxidant, 0.5-3 part of a first cross-linking agent and 1-20 parts of a first additive; and the material B comprises the following components in parts by weight: 100 parts of a second thermoplastic polymer, 0.3-1.2 parts of a second antioxidant, 0.3-2 part of a second cross-linking agent, 2-5 parts of a foaming agent, 60-100 parts of an anti-radiation agent 1-20 parts of a second additive. The material A and the material B in the radiation-proof high-integrity container have good compatibility; and the anti-radiation agent is selected from two or more of tungsten, lead, bismuth, heavy metal salt, heavy metal oxide, rare earth oxide, a compound containing a lithium element and a compound containing a boron element.

Description

technical field [0001] The invention relates to the field of nuclear waste treatment, in particular to a radiation-proof high-integrity container and a preparation method thereof. Background technique [0002] According to the "Radioactive Waste Classification" announcement jointly issued by the Ministry of Environmental Protection, the Ministry of Industry and Information Technology, and the State Administration of Science, Technology and Industry for National Defense, the waste generated during normal operation of nuclear power plants is classified as low- and medium-level radioactive waste. These wastes require effective containment and isolation for centuries and can be disposed of in near-surface disposal facilities with engineered barriers. In order to achieve safe disposal, packaging containers are used as a barrier. The design, processing and manufacturing of packaging containers and product inspection must be carried out in accordance with standards and specificatio...

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Problems solved by technology

[0005] However, the current cross-linked high-density polyethylene high-integrity containers do not have the function of radiation shielding. After the container is directly filled with waste, the external surface of the container has a very high contact dose rate, which can reach the Sv / h level. The health and environment of the place where it is placed have a great impact

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