Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method

A technology of electrostatic collection method and radon extraction rate, which is applied in the field of nuclear radiation detection, can solve the problems of large amount of calculation and complicated calculation of data fitting by accumulation method, and achieve the effects of accurate results, simple measurement process and calculation method.

Inactive Publication Date: 2015-12-23
HENGYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cumulative data fitting method has a large amount of calculation and is complex to calculate.

Method used

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  • Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method
  • Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method
  • Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method

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Embodiment 1

[0048] Embodiment 1. A method for fast measurement of radon exhalation rate by closed-loop partial integration of electrostatic collection method, analyzing the initial data of the rising curve of radon concentration in the radon collection chamber obtained by the electrostatic collection method radon measuring instrument, ignoring the effective decay Constant, and modify the existing calculation method, the radon exhalation rate can be obtained by simple algebraic operation.

[0049] The measurement method includes measurement process and calculation process, and its specific steps are as follows:

[0050] 1. Measurement process:

[0051] Buckle the opening-collecting radon cover 1 on the surface 6 of the medium to be measured, and the radon atoms in the medium to be measured 6 will escape from the surface and enter the collection chamber of the opening-collecting radon cover 1 under the action of diffusion and seepage, causing the opening-collecting radon cover 1 to collect ...

Embodiment 2

[0091] Embodiment two, the measurement process and the calculation process of the present embodiment are basically the same as the first embodiment, the difference is that the first embodiment adopts the open collection radon hood 1, and what the present embodiment adopts is the airtight collection radon hood 7, and the airtight collection radon cover 7 Radon cover 7 volume is 4 liters, and the bottom area of ​​airtight collection radon cover 6 is 430cm 2 , the medium 8 to be measured is placed in the airtight radon hood 7 .

[0092] The airtight collecting radon hood 7 comprises a rectangular container 7-1 with an open bottom and a sealing plate 7-2, and the top plate of the rectangular container 7-1 is provided with an air inlet joint 7-1-2 and an air outlet joint 7-1- 1. The sealing plate 7-2 is connected with the opening end of the rectangular container 7-1 by screws, and the opening end of the rectangular container 7-1 is closed by the sealing plate 7-2.

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Abstract

A quick radon exhalation rate measurement method using integral for a closed loop part of an electrostatic collection method comprises a measurement process and a calculation process. The measurement process uses a short time interval for measurement, which is between 2 and 10 minutes. Data of a plurality of measurement periods are measured continuously in each measurement. The calculation process carries out analysis of data of the initial part of a rising curve of the radon concentration in a collection chamber of a radon collection cover measured by a radon measurement instrument using the electrostatic collection method, ignores an effective decay constant, corrects an existing calculation method, employs simple algebraic operations, and then obtains the radon exhalation rate.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method for rapidly measuring radon exhalation rate by using an electrostatic collection method with closed-loop partial integration. Background technique [0002] Radon in the air environment mainly comes from the precipitation on the surface of the medium. The main methods for measuring the precipitation rate of radon on the surface of the medium are the accumulation method and the activated carbon adsorption method. The activated carbon adsorption method is to use activated carbon to adsorb the precipitated radon, and obtain the radon precipitation rate by measuring the γ spectrum generated by the decay of radon adsorbed in the activated carbon. This method takes a long time to measure and is not easy to automate; the accumulation method is mainly used for measuring The average radon exhalation rate over a period of time has important statistical significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/24
Inventor 谭延亮袁红志
Owner HENGYANG NORMAL UNIV
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