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Quick valuing method and device for radon exhalation rate

A radon exhalation rate and fast technology, applied in the field of nuclear radiation detection, can solve the problems of radon concentration taking a long time and affecting the radon exhalation rate setting speed, etc., and achieve the effect of improving the setting speed

Active Publication Date: 2018-08-03
HENGYANG NORMAL UNIV +1
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Problems solved by technology

In fact, in the current process of measuring the radon exhalation rate using the cumulative method, the method of measuring the radon concentration is basically similar to the method introduced in the above-mentioned literature. Both tubes are used to connect the radon collection chamber and the measurement chamber into a loop. During the measurement process , first mix the air in the radon collection room and the measurement room for a period of time to achieve the balance of the radon concentration in the radon collection room and the measurement room, and then use T as the measurement period to measure the radon concentration. The radon concentration in the room will gradually increase. In order to ensure the accuracy of the measurement results, it is necessary to mix and balance the radon in the collecting room and the measuring room before each measurement with T as the cycle. Frequent mixing and balancing processes will lead to radon concentration The process of setting the value takes a long time, which affects the speed of setting the radon exhalation rate

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  • Quick valuing method and device for radon exhalation rate
  • Quick valuing method and device for radon exhalation rate
  • Quick valuing method and device for radon exhalation rate

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Embodiment Construction

[0047] In order to facilitate those skilled in the art to better understand the improvements of the present invention over the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] It should be noted in advance that in the present invention, K i,j Indicates the scale factor of the period from the i-th measurement period to the j-th measurement period under the condition of constant radon concentration, N i,j Indicates the number of α particles produced by decay and collected by the detector during the period from the beginning of the i-th measurement period to the start of the j-th measurement period; N j is the total count of alpha particles collected by the detector at the beginning of the jth measurement period. The above-mentioned i and j are only codes one by one, and are used to represent any natural number.

[0049] The radon exhalation rate rapid determination method that the present i...

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Abstract

The invention provides a quick valuing method and device for a radon exhalation rate. The method provided by the invention utilizes an interpolation method for performing equating on changing radon concentration and includes steps of obtaining environmental radon concentration C0 through measurement of an environment background; starting radon collection after implementing environment background measurement, wherein T is taken as a measurement cycle during the radon process; calculating the radon concentration when a plurality of measurement cycles end; and calculating the radon exhalation rate according to the radon concentration when a plurality of measurement cycles end during the radon collection process. According to the invention, no mixing balancing process is required in radon concentration measurement, and the radon exhalation rate valuing speed can be improved substantially.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method and device for quickly determining the radon exhalation rate. Background technique [0002] The commonly used method to measure the radon exhalation rate on the surface of the medium is the accumulation method, that is, a radon collection chamber is fastened to the surface of the medium, and the radon exhalation rate in the radon collection chamber is measured for a period of time, and the radon exhalation rate can be deduced. The speed of the radon exhalation rate determination process mainly depends on the speed of the radon concentration measurement process. [0003] Chinese patent document CN105425267A discloses a method for measuring the radon exhalation rate. When measuring the radon concentration, the method needs to start the sampling pump to extract the radon-containing air in the measured environment for a period of time. At this time, the r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 李志强肖德涛赵桂芝
Owner HENGYANG NORMAL UNIV
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