Collecting and measuring device for tritiated water in air
By designing devices for tritium collection and measurement in the air, including measuring ionization chamber, compensation ionization chamber and drying tube, the problem of difficulty in tritium collection and measurement in low temperature and low humidity environments in winter is solved, and high accuracy and low cost tritium measurement are achieved.
Patent Information
- Application Number
- CN202411681943.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-02-28
AI Technical Summary
The existing technology is difficult to effectively collect and measure tritium in the air in low temperature and low humidity environments in winter, and cannot meet the requirements of monitoring the winter radiation environment quality in northern my country.
A collection and measurement device for tritiated water in the air is designed, including a measurement ionization chamber and a compensation ionization chamber, which is dried and compensated by drying tubes and desiccants (such as color-discolored silicone or 3A molecular sieve) to ensure accurate collection and measurement of tritium in low humidity environments.
It realizes high accuracy of tritium collection and measurement in low humidity environments, reduces sampling costs, is easy to operate, and is suitable for tritium determination in areas with lower air humidity.
Smart Images
Figure CN119534056A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of radiation protection and environmental protection, and in particular relates to a device for collecting and measuring tritiated water in the air. Background Art
[0002] Tritium is an important natural and artificial radionuclide, with a maximum energy of 18.6keV, an average energy of 5.7keV, and a half-life of 12.45 years. As a low-energy β-radionuclide, tritium is not likely to cause external radiation hazards to the human body, but due to its long half-life and high isotope exchange rate and oxidation rate, it will cause internal radiation hazards to human tissues and organs, so it is necessary to manage and control its release in the environment.
[0003] At present, the commonly used methods for sampling and measuring tritium in the air are difficult to sample and measure in the low temperature and low humidity environment in winter. The existing methods and equipment can hardly meet the requirements for winter radiation environment quality monitoring in northern my country. Summary of the invention
[0004] The purpose of the present invention is to provide a device for collecting and measuring tritiated water in the air, which is particularly suitable for measuring tritium in air in areas with low air humidity, and can also confirm whether it is a detectable concentration when the critical value is relatively low.
[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: a device for collecting and measuring tritiated water in the air, comprising a measuring ionization chamber and a compensating ionization chamber, wherein the measuring ionization chamber comprises a measuring ionization chamber air inlet and a measuring ionization chamber air outlet, the compensating ionization chamber comprises a compensating ionization chamber air inlet and a compensating ionization chamber air outlet, a drying tube is arranged between the measuring ionization chamber air outlet and the compensating ionization chamber air inlet, a desiccant is arranged in the drying tube, and an air pump is connected to the compensating ionization chamber air outlet end through a pipeline.
[0006] Furthermore, the air inlet of the measuring ionization chamber is connected in sequence with a meter and a filter.
[0007] Furthermore, the compensating ionization chamber is a 2.5L γ compensating ionization chamber.
[0008] Furthermore, the desiccant is color-changing silica gel or 3A molecular sieve.
[0009] Furthermore, the measuring ionization chamber and the compensating ionization chamber are also connected to a display host.
[0010] Furthermore, the measuring ionization chamber and the compensating ionization chamber communicate with the display host via RS485.
[0011] The beneficial effects of the present invention are:
[0012] The measured gas of the present invention is first measured in a measuring ionization chamber, and then dried by a drying tube before entering a compensating ionization chamber for further measurement; when a desiccant is selected, a tritium sampler uses a pump to draw air through the desiccant, and then the air is collected for measurement in the measuring ionization chamber, and the monitoring result is compensated by the compensating ionization chamber, so that the result has good accuracy, is convenient and quick, and has a low sampling cost and is easy to operate, and is particularly suitable for air tritium measurement in areas with low air humidity. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 Schematic diagram of the structure of the device for collecting and measuring tritiated water in the air;
[0014] Figure numerals: measuring ionization chamber-1, compensating ionization chamber-2, measuring ionization chamber air inlet-3, measuring ionization chamber air outlet-4, compensating ionization chamber air inlet-5, compensating ionization chamber air outlet-6, drying tube-7, air pump-8, meter-9, filter-10. DETAILED DESCRIPTION
[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0016] like Figure 1 As shown, a device for collecting and measuring tritiated water in the air comprises a measuring ionization chamber 1 and a compensating ionization chamber 2, wherein the measuring ionization chamber 1 comprises a measuring ionization chamber air inlet 3 and a measuring ionization chamber air outlet 4, the compensating ionization chamber 2 comprises a compensating ionization chamber air inlet 5 and a compensating ionization chamber air outlet 6, a drying tube 7 is arranged between the measuring ionization chamber air outlet and the compensating ionization chamber air inlet, a desiccant is arranged in the drying tube, and an air pump 8 is connected to the compensating ionization chamber air outlet end through a pipeline.
[0017] The air inlet of the measuring ionization chamber is connected with a meter 9 and a filter 10 in sequence.
[0018] The compensation ionization chamber is a 2.5L γ compensation ionization chamber.
[0019] The desiccant is color-changing silica gel or 3A molecular sieve.
[0020] The measuring ionization chamber and the compensating ionization chamber are also connected to a display host 11 .
[0021] The measuring ionization chamber and the compensating ionization chamber are 2.5L measuring ionization chamber and 2.5L compensating ionization chamber, which communicate with the display host via RS485. The desiccant includes silica gel, molecular sieve, etc. The desiccant tube contains color-changing silica gel. When the color-changing silica gel changes from orange-red to dark color, please replace the color-changing silica gel.
[0022] During operation: the measured gas is first measured in the measuring ionization chamber, and then dried in the drying tube and then measured again in the compensating ionization chamber; when the desiccant is selected, the tritium sampler uses a pump to draw air through the desiccant. The desiccant includes silica gel, molecular sieve, etc. The drying tube contains color-changing silica gel. When the color-changing silica gel changes from orange-red to dark, please replace the color-changing silica gel, and then collect the measurement in the measuring ionization chamber. The monitoring results are compensated by the compensating ionization chamber. The results have good accuracy, are convenient and fast, and the sampling cost is low and easy to operate. It is especially suitable for air tritium determination in areas with low air humidity.
Claims
1. A device for collecting and measuring tritiated water in air, comprising a measuring ionization chamber and a compensating ionization chamber, characterized in that: The measuring ionization chamber comprises a measuring ionization chamber air inlet and a measuring ionization chamber air outlet, the compensating ionization chamber comprises a compensating ionization chamber air inlet and a compensating ionization chamber air outlet, a drying tube is arranged between the measuring ionization chamber air outlet and the compensating ionization chamber air inlet, a desiccant is arranged in the drying tube, and the compensating ionization chamber air outlet end is connected to an air pump through a pipeline.
2. The device for collecting and measuring tritiated water in the air according to claim 1, characterized in that: The air inlet of the measuring ionization chamber is connected with a meter and a filter in sequence.
3. The device for collecting and measuring tritiated water in the air according to claim 1, characterized in that: The compensation ionization chamber is a 2.5L γ compensation ionization chamber.
4. The device for collecting and measuring tritiated water in the air according to claim 1, characterized in that: The desiccant is color-changing silica gel or 3A molecular sieve.
5. The device for collecting and measuring tritiated water in the air according to claim 1, characterized in that: The measuring ionization chamber and the compensating ionization chamber are also connected to a display host.
6. The device for collecting and measuring tritiated water in the air according to claim 5, characterized in that: The measuring ionization chamber and the compensating ionization chamber communicate with the display host via RS485.