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High-solidification-temperature gaseous component sampling device and sampling method

A technology of solidification temperature and sampling device, which is applied in the direction of electrical components, particle separation tubes, sample introduction/extraction, etc., can solve the problems of large temperature difference in melting pool and difficulty in obtaining measurement results, so as to prevent leakage, realize real-time sampling analysis, The effect of lowering the temperature

Active Publication Date: 2020-12-22
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing research, the mass spectrometer is mainly used to measure the components in the gas online. However, due to the structural limitations of the mass spectrometer, its working temperature is generally below 1300 °C, which is far from the temperature of the melting pool, and it is difficult to obtain more accurate measurements. measurement result

Method used

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  • High-solidification-temperature gaseous component sampling device and sampling method
  • High-solidification-temperature gaseous component sampling device and sampling method
  • High-solidification-temperature gaseous component sampling device and sampling method

Examples

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Embodiment 1

[0049] In order to effectively reduce the uncertainty of experimental research on the release characteristics of fission products in severe accidents and provide strong support for the formulation of mitigation measures for severe accidents, this example proposes a sampling device for gaseous components at high freezing temperatures. The sampling device in this embodiment builds a special gas flow field in the sampling tube by controlling the flow rate of the sampling gas and the protective gas, preventing the fission products in the gas from contacting the low-temperature sampling tube and being adsorbed on the wall, while reducing the temperature of the sampling gas to protect the back-end analysis equipment.

[0050] like figure 1 As shown, the sampling device of this embodiment includes: a sampling tube 1, a casing 2 and a gas flow control system 3;

[0051] The sampling end of the sampling tube 1 is connected to the sampling interface on the experimental device, and the ...

Embodiment 2

[0065] In this embodiment, the high solidification temperature gas component sampling device proposed in the above embodiment 1 is applied to the real-time sampling and analysis of high-temperature gas in different reactor-type fission product release experimental devices. The specific process is as follows:

[0066] The sampling interface 1-1 of the sampling tube 1 of the assembled sampling device is connected to the gas sampling point in the experimental device, and the analysis interface 1-2 is connected to the back-end mass spectrometer.

[0067] After the fission product release characteristic experimental device reaches the experimental working condition, the mass spectrometer is started and the gas flow control system starts to provide shielding gas.

[0068] The mass spectrometer forms a negative pressure environment at the analysis interface, so that the high-temperature gas in the experimental device enters the sampling port.

[0069] Afterwards, adjust the flow rate...

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Abstract

The invention discloses a high-solidification-temperature gaseous component sampling device and a sampling method. The high-solidification-temperature gaseous component sampling device comprises a sampling pipe, a sleeve and a gas flow control system, wherein the sleeve is hermetically sleeved outside the sampling tube; the sampling tube is used for sampling high-temperature gas generated in the experimental device in real time and sending the high-temperature gas to the mass spectrometer for analysis; protective gas flow channels with different sizes are formed in the pipe wall of the sampling pipe, a certain angle is formed between each protective gas flow channel and the axial direction of the sampling pipe, and therefore a spiral flow field is constructed in the sampling pipe; the sleeve is used for constructing a protective gas circulation channel and is combined with protective gas flow channels with different sizes in the sampling pipe, and therefoore the stability of a spiral flow field can be ensured by controlling the flow of protective gas flow at different positions. The device can be used for sampling a high-temperature gaseous mixture, realizes real-time sampling analysis of an experimental device, can prevent a fission product from contacting and adsorbing a wall surface, can quantitatively obtain release transient data of the fission product under a severe accident condition, and effectively reduces uncertainty of an experimental result.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant experiments, and in particular relates to a sampling device and a sampling method for gaseous components with high solidification temperature, which are used to study the composition and proportion of each component in high-temperature gas under severe accident conditions. Background technique [0002] During a severe accident in a nuclear power plant, the reactor core melts to produce high-temperature molten matter, which melts the lower head of the pressure vessel and enters the interior of the containment vessel. In addition to fuel and structural materials, high-temperature melts also contain fission products, the main source of radioactivity in accidents. The fission products include fission gases such as xenon and krypton, volatile components such as iodine, cesium and bromine, semi-volatile components such as molybdenum, rhodium and barium, and low-volatile components such as st...

Claims

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Application Information

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IPC IPC(8): H01J49/04H01J49/00
CPCH01J49/0409H01J49/0422H01J49/0031
Inventor 胡钰文宫厚军杨祖毛李朋洲卓文彬昝元锋李勇黎阳
Owner NUCLEAR POWER INSTITUTE OF CHINA