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Aerosol radioactivity monitoring device and measuring method

A monitoring device and measurement method technology, which is applied in the direction of measuring device, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problem that the filter material is large, which affects the measurement accuracy of radioactive aerosol activity concentration, and affects the measurement system. Stability and other issues, to achieve the effect of improving the lower limit of detection

Pending Publication Date: 2020-10-02
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the filtration efficiency of aerosol particles with different aerodynamic diameters varies greatly with the sampling filter membrane, and it is impossible to uniformly evaluate the collection efficiency of full-size aerosols, which greatly affects the measurement accuracy of radioactive aerosol activity concentrations.
The filter material has a large resistance to airflow (>30kPa), and a large-volume, high-power air pump is required, which is not suitable for aerosol collection tasks in small spaces, and cannot collect and analyze ultrafine aerosol particles
During the aerosol sampling process, if the aerosol concentration is high, the filter membrane will be clogged and the stability of the measurement system will be affected. Therefore, the existing filter membrane collection is difficult to meet the design requirements of the radioactive aerosol monitoring system

Method used

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  • Aerosol radioactivity monitoring device and measuring method
  • Aerosol radioactivity monitoring device and measuring method

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0043] The invention discloses an aerosol radiation monitoring device and a measuring method.

[0044] Active aerosol continuous sampling and radioactivity measurement device with continuous radioactivity measurement function, the device is composed of aerosol spray sampling unit 1, peristaltic pump 2, gas collection pipeline 3, and liquid scintillation measurement unit 4.

[0045] The device and method of the present invention use the gas washing and spraying of the collected liquid to efficiently sample the aerosol and iodine vapor. sampling and real-time monitoring.

[0046] The exterior of the device can be surrounded by aluminum alloy sheets, and the aerosol spray sampling unit. The aerosol sampler is composed of the outer wall of the glass container, stainless steel atomizing nozzle, stainless steel round hole plate, stainless steel baffle, ...

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Abstract

The invention discloses an aerosol radioactivity monitoring device and a measuring method. The aerosol radioactivity monitoring device comprises an aerosol spraying and sampling unit, a peristaltic pump, a gas production pipeline and a liquid flash measuring unit. The aerosol radioactivity monitoring device is used in a closed place with radioactive aerosol, and active aerosol sampling is carriedout by utilizing air pumping of an air pump and spraying of a spray head; and radioactive liquid measurement is carried out through the liquid flash measurement device. The device has the advantages of being small in size, convenient to operate, accurate in measurement, stable in flow and the like, and has wide application prospects in the aspects of radioactive aerosol collection and measurement.

Description

technical field [0001] The invention relates to an aerosol radioactivity monitoring device and a measurement method, in particular to the fields of radioactive aerosol aerosol monitoring, emergency treatment of nuclear accidents and daily closed space radioactivity monitoring. Background technique [0002] Aerosol is a suspension system of liquid or solid particles in the air. Fog, smoke, dust, etc. are all aerosols caused by natural or man-made reasons. Nuclear technology production accidents, nuclear facility operation, rare earth and uranium mining, etc., may cause long-lived radioactive substances to disperse in the air in a closed space, forming artificial radioactive aerosols. These tiny particles are mainly produced by inhalation. For radiation damage, in order to ensure the health of the public and the assessment of the accident level, the usual monitoring method is to use a radioactive aerosol continuous monitor to conduct continuous monitoring on site. [0003] Co...

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Application Information

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IPC IPC(8): G01T1/204G01T1/167
CPCG01T1/204G01T1/167
Inventor 王鹏杨毅任杰刘颖龚频
Owner NANJING UNIV OF SCI & TECH
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