Method and device for monitoring radioactivity artificial aerosol

Abstract

This invention relates to one radioactive artificial aerosol monitor method and its device, which comprises the following steps: a, detector real time detects filter aerosol alpha, beta signals through front amplifier output; b, dividing the signals into two paths through first and second amplifier and inputting the first signals through multi-impulse analyzer to testalpha energy spectrum; c, adopting energy discreet method to input output signals into single impulse analyzer to et total meter rate; d, by use of Rn, Th sub decay link RaC and ThC beta-alpha decay and for discreet; e, meter unit minus the first gate from second one to get meter rate and to get Rn and Th sub parts; the meter unit minus the Rn, Th rate from total rate to get the radioactive aerosol meter rate.

Description

technical field [0001] The invention relates to a method and device for monitoring artificial aerosol, in particular to a method and device for monitoring artificial radioactive aerosol in underground nuclear facilities, nuclear power plants, reactors, spent fuel reprocessing plants and other nuclear facility environments. Background technique [0002] The monitoring of radioactive artificial nuclide aerosol (or called artificial aerosol) is an important part of the environmental protection of nuclear facilities. In the discharge streams and workplaces of nuclear facilities such as nuclear power plants, reactors, and spent fuel reprocessing plants, radioactivity in the air must be monitored. Aerosols are continuously monitored to protect the safety of the nuclear environment and the health of workers. Due to the presence of radon (Rn) in the environment (Th) daughter aerosols, which will interfere with the monitoring of radioactive artificial aerosols. For this reason, de...

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Problems solved by technology

However, this method also separates part of the artificial aerosol while separating the natural Rn and Th daughters. Since the particle size distribution of the aerosol is a continuum, when the proportion of the separated natural Rn and Th daughters increases, the artificial aerosol The fraction that is separated will also increase, so its efficiency in collecting artificial aerosols will vary with aerosol particle size

In different workplaces, the particle size distribution of artificial aerosols is different, and their collection efficiency is also different. Therefore, there are some uncertainties in the measurement results of this method, and the accuracy is poor.

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