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Measuring device and measuring method of high-concentration tritium in gas

A measuring device and high-concentration technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems such as inaccurate measurement, high ionization chamber measurement results, and increased ionization chamber background to eliminate memory effects , the effect of accurate measurement

Inactive Publication Date: 2013-08-28
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology

However, when the concentration of tritium is high, especially in the presence of tritiated water vapor, the background of the ionization chamber will be greatly increased due to the large amount of tritium adsorption by the chamber wall material (generally, it will increase by more than 2 orders of magnitude) , which will directly lead to high ionization chamber measurement results during continuous monitoring of tritium concentration, which cannot be accurately measured
In addition, it is difficult to decontaminate the ionization chamber after contamination, and it takes a long time to restore the background of the ionization chamber to normal

Method used

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  • Measuring device and measuring method of high-concentration tritium in gas

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Embodiment 1

[0037] figure 1 It is a structural schematic diagram of the high-concentration tritium measurement device in gas of the present invention. exist figure 1Among them, the device for measuring high-concentration tritium in gas of the present invention contains two cylindrical first ionization chambers I and second ionization chambers II with the same structure. Among them, the first ionization chamber I includes a shell 1, a first insulating member 2, an ionization chamber wall 3, a second insulating member 4, a first gas pipe 5, a first collector 6, a third insulating member 7, and a fourth insulating member 8. Protective ring 9, fifth insulator 10, ionization chamber upper cover 11, sixth insulator 12, high-voltage terminal 13, nut 14, high-voltage cable head 15, signal cable head 16, second gas pipe 17; its connection The relationship is that the collector 6 is located on the central axis of the first ionization chamber I, the lower end of the collector 6 is suspended in the...

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Abstract

The invention provides a measuring device and a measuring method of high-concentration tritium in a gas. The measuring device is composed of two cylindrical ionization chambers having the same structure and material while different dimensions. The measuring method comprises the following steps: sequentially passing a tritium-containing gas by the two ionization chambers in the measuring device provided by the invention, driving the two ionization chambers in the measuring device to work under a compensation mode, and obtaining the concentration of tritium in the gas in a signal coincidence manner. The measuring device provided by the invention can completely eliminate the effect of memory effect caused by tritium adsorption of the ionization chamber walls on the measurement result when measuring the high-concentration tritium in the gas so as to accurately measure the tritium in the gas for a long time under a high concentration condition. The measuring device and the measuring method provided by the invention completely meet real-time and continuous measurement demands on the high-concentration tritium in various occasions.

Description

[0001] technical field [0002] The invention belongs to the technical field of radiation protection and environmental protection, and in particular relates to a measuring device for high-concentration tritium in gas and a measuring method thereof. It is suitable for real-time measurement of tritium concentration in tritium operating glove boxes, secondary containers and other tritium containing containers. Background technique [0003] Tritium is the only radioactive isotope of hydrogen. The maximum energy of beta rays emitted by tritium decay is 18.6keV, and its average energy is 5.65keV. Tritium may corrode containment materials or cause degradation of material properties (brittleness, aging). Moreover, tritium can also enter the human body through inhalation, ingestion, and infiltration through intact skin, and be absorbed by human tissue and cause it to be exposed to internal radiation hazards. Due to its radioactive hazards and its characteristics in the environment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/66
Inventor 陈志林彭述明孟丹常瑞敏吴冠银穆龙贺月虹王和义
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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