Device and method stably regulating and controlling radon progeny state parameter

A technology of state parameters and radon daughters, applied in the field of nuclear science, can solve the problems of inability to provide continuous and stable changes, lack of calibration and calibration experimental devices, etc., and achieve the effect of low construction and operation costs

Active Publication Date: 2018-01-19
NANHUA UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to design a continuous and stable control system for the present situation that the current radon daughter monitor is relatively lacking in on-site scale calibration experimental devices and cannot provide continuously and stably changing radon daughter concentration and radon daughter balance factor. Radon daughter state parameter device to meet the needs of on-site calibration of radon daughter monitors

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  • Device and method stably regulating and controlling radon progeny state parameter
  • Device and method stably regulating and controlling radon progeny state parameter
  • Device and method stably regulating and controlling radon progeny state parameter

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Embodiment Construction

[0024] It should be noted in advance that in the description of the present invention, "before" and "after" should be understood in this way: for component A and component B on the same pipeline, relatively speaking, if component A is closer to the intake air of the pipeline Component A is considered to be set before component B, otherwise, component A is considered to be set after component B.

[0025] figure 1 It shows the overall structure of a device capable of stably regulating the state parameters of radon daughters, which includes a monodisperse aerosol generating unit, a small-volume radon chamber, a source-filling control loop, a radon daughter state parameter control loop, and a sampling monitoring loop ;

[0026] The monodisperse aerosol generating unit is used to stably input monodisperse aerosol of a certain concentration and particle size into the small-volume radon chamber according to different flow rates, which includes a monodisperse aerosol generator (monod...

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Abstract

A device and method stably regulating and controlling radon progeny state parameters relate to the nuclear science technical field; the device stably regulating and controlling radon progeny state parameters comprises a monodispersion aerosol generation unit, a small volume radon chamber, a source filling regulation and control loop, a radon progeny state parameter regulation and control loop, anda sampling monitoring loop; the sampling monitoring loop can intake a sampling flow rate of the sampling measuring device into a radon chamber total air-exchange flow rate, so the sampling measuringdevice cannot affect the radon progeny state parameters in the radon chamber; the radon progeny state parameter regulation and control loop can continuously and stably regulate and control the radon progeny concentration, radon progeny balance factors and radon progeny uncombined state fraction, thus providing continuous and complete radon progeny parameters for a radon progeny monitor scale calibration test and an artificial radioactivity aerosol monitor radon progeny compensation validity test; the device and method are suitable for field scale calibration tests of the radon progeny monitor.

Description

technical field [0001] The invention relates to the field of nuclear science and technology, in particular to a device and method capable of stably regulating the state parameters of radon daughters. Background technique [0002] At present, the radon daughter state parameter control devices established at home and abroad mainly use 25-30m 3 The large-volume radon chamber occupies a large space. In order to obtain a higher concentration of radon daughters, the large-volume radon chambers all use MBq-level radon sources, and multiple monodisperse aerosol generators are used to continuously input aerosols for a long time during the control process, resulting in high construction and operating costs. Since it takes a long time for the regulation and control of large-volume radon chambers to reach stability, it is not convenient for wide-scale promotion and use, nor can it meet the on-site calibration requirements of radon daughter measuring equipment. At the same time, the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
Inventor 肖德涛黄成李志强何正忠丘寿康单健
Owner NANHUA UNIV
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