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Apparatus and method for measuring gas migration characteristics and expansion force of cushioning materials

A buffer material and expansion force technology, which is applied in the field of devices for measuring the gas migration characteristics and expansion force of buffer materials in high-level radioactive waste repositories, can solve problems such as the inability to determine the impact of gas and buffer material gas migration characteristics, and improve accuracy Effect

Active Publication Date: 2021-09-07
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, when researching the migration characteristics of buffer materials in the laboratory, the existing devices cannot determine whether the gas migrates from the inside of the buffer material or from the contact surface between the buffer material and the device, which has caused a lack of research on the gas migration characteristics of buffer materials. Impact

Method used

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  • Apparatus and method for measuring gas migration characteristics and expansion force of cushioning materials
  • Apparatus and method for measuring gas migration characteristics and expansion force of cushioning materials

Examples

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Embodiment 1

[0041] like figure 1 As shown, a device for measuring gas migration characteristics and expansion force of cushioning materials includes a cylinder body 2. A hollow cavity is formed inside the cylinder body 2 to hold a sample 4. The inner wall of the cylinder body 2 of the hollow cavity section is formed with an annular water storage cavity 9, the water storage cavity 9 is connected to the water injection device through the first water injection hole 3. A sealant 10 is also provided on the inner wall of the cylinder body 2 of the hollow cavity section. Specifically, the choice of the sealant 10 is not limited, as long as it can generate greater adhesion to the sample 4, preferably silica gel. The height of the silica gel is greater than or equal to the height of the sample 4, which is used to seal the circumferential boundary of the sample 4 and prevent the gas less than the adhesive force of the silica gel from migrating from the sample boundary. A valve is connected betwee...

Embodiment 2

[0047] like figure 2 Shown, all the other are identical with embodiment 1, difference is:

[0048] There are two through holes 7, which are respectively an air outlet hole 72 for connecting a gas monitoring device and a second water injection hole 71 for connecting a water injection device.

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Abstract

The invention discloses a device and method for measuring gas migration characteristics and expansion force of buffer materials, which relate to the technical field of high-level radioactive waste disposal. The measuring device includes a cylinder body, and a hollow cavity for containing samples is formed inside the cylinder body, and an annular water storage cavity is formed on the inner wall of the cylinder of the hollow cavity section, and the water storage cavity is connected to the water injection device through the first water injection hole; The inner wall of the cylinder of the hollow cavity section is also provided with a sealant for sealing the boundary of the sample. The measuring device disclosed in the present invention can not only increase the adhesive force of silica gel relative to the sample by setting a water storage chamber on the side wall of the cylinder body, and pressurize the water storage chamber to ensure the sealing of the sample boundary, so as to study the buffer material gas. Migration characteristics can also be measured by setting a constant volume of water in the water storage chamber, according to the change in water pressure when the sample absorbs water and expands to squeeze the water in the water storage chamber, and measures the expansion force generated by the sample's water absorption and expansion. It has complete functions. And the measurement result is more accurate.

Description

technical field [0001] The invention relates to the technical field of high-level radioactive waste disposal, in particular to a device and method for measuring gas migration characteristics and expansion force of buffer materials in a high-level radioactive waste disposal storehouse. Background technique [0002] In recent years, with the wide application of nuclear technology in various fields such as national defense, industry, agriculture, and medicine, more and more high-level radioactive wastes have been produced. Therefore, the problem of radioactive nuclear waste disposal has become increasingly serious. [0003] For the disposal of high-level radioactive waste, the feasible solution generally accepted by the international community is to bury the high-level radioactive waste in a stable formation at a depth of 500-1000m underground, that is, after the high-level radioactive waste is solidified and filled, it is stored in a deep place. In the geological repository, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01L5/00
CPCG01L5/00G01N13/00
Inventor 倪宏阳刘江峰范祯栋吕荣浩孙晨祎
Owner CHINA UNIV OF MINING & TECH