Container for storing, transporting and disposing radioactive waste
A technology for radioactive waste, containers, applied in the directions of lightweight protective containers, climate sustainability, reduction of greenhouse gases, etc., can solve the problems of lack of protection from the environment, reduced operational reliability, reduced low impact strength of silicon carbide tanks, etc.
Pending Publication Date: 2022-04-26
CERAMTEC
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Problems solved by technology
[0006] A disadvantage of known containers for storage, transport and disposal of solid radioactive waste is that the low impact strength of silicon carbide tanks is further reduced because by pouring vitrified waste at a temperature of 1200°C into silicon carbide tanks, the radioactive waste in containers
This leads to thermal stresses in the tank and, after cooling of the vitrified waste, residual stresses that reduce the operational reliability of the tank during the following technical operations: loading waste, moving containers during transport and other operations
In addition, the container has the disadvantage of lacking means of protecting the environment from radiation emitted by radioactive waste
Method used
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Embodiment Construction
[0013] The proposed design is implemented as follows:
[0014] Cans made of silicon carbide were fabricated using the following technique. Blanks with the desired geometry are pressed by hydrostatic pressure from fillers of the desired formulation, followed by thermal operations: polymerization at T=150°C, carbonization at T=900°C, siliconization at T=1500°C, Silicon carbide cans with a free silicon content of 3% to 30% by weight are thus obtained. After sandblasting, a layer of silicon carbide is applied to the outer surface of the tank by the vapor phase method. A layer of metal foam (aluminum foam, titanium foam, copper foam, etc.) with a thickness of 110 mm was placed on the outer surface of the tank obtained in this way, and a steel casing with a thickness of 1.5 mm was placed on the metal foam. The pores of the metal foam are filled with dispersed 40 microns to 50 microns of B 4 C powder (see figure 1 ).
[0015] Test Results
[0016] When dropped onto the steel pl...
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Abstract
The invention relates to the field of nuclear technology. A container for storing, transporting and disposing solid radioactive waste, the container comprising a tank made of reaction sintered silicon carbide having a free silicon content of 3% to 30% by weight wherein a gas phase silicon carbide layer is deposited on the surface of the tank. The outer layer of the tank is made of metal foam, the aperture ratio of the metal foam is 60%-70%, and the pore diameter is 5 mm-6 mm; the pores are filled with dispersed 40 [mu] m to 50 [mu] m boron carbide powder, thereby protecting the environment from nuclear radiation emitted by the HLW. A stainless steel tank made of stainless steel having a thickness of 1 mm to 1.5 mm and intended to contain radioactive waste is placed in the silicon carbide tank. A 5 mm gap between the inner surface of the silicon carbide tank and the stainless steel tank is filled with boron carbide powder, thereby protecting the environment from nuclear radiation emitted by high-level radioactive waste. The silicon carbide can is sealed with a lid made of silicon carbide using a reaction welding method. The metal foam used as the metal foam having an opening ratio is selected from a metal selected from the group consisting of titanium, aluminum, and copper. The strength of the container for the solid radioactive waste can be improved.
Description
technical field [0001] The invention relates to the field of nuclear technology, in particular, the invention relates to a device for protecting the environment from environmentally harmful substances, which can be used for storage, transport and disposal of highly toxic waste, such as radioactive materials from nuclear power plants, nuclear powered ships Waste, toxic substances in the chemical industry and other hazardous industrial waste. Background technique [0002] Containers known to be useful for solid radioactive waste are made in the form of a steel protective casing with a steel container inside which the waste is placed, and the space between the casing and the container is filled with a filler made of formaldehyde resin (US Patent No. 4377509, G21F 9 / 24, 1983). [0003] A disadvantage of the known container is the unsatisfactory reliability of waste disposal, which is related to the insufficient corrosion resistance of the container. It is known that a containe...
Claims
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IPC IPC(8): G21F5/005
CPCG21F5/005G21F5/08G21F5/12Y02E30/30
Inventor 根纳季·伊万诺维奇·巴巴扬茨康斯坦丁·根纳季耶维奇·巴巴扬茨奥列格·维塔利耶维奇·沙里金
Owner CERAMTEC