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A kind of preparation method of radioactive gas simulation standard source

A radioactive gas and standard source technology, applied in radiation measurement, X-ray energy spectrum distribution measurement, instruments, etc., can solve the problems of short half-life and difficulty in direct sampling and measurement of radioactive gas, achieve good uniformity, avoid radioactive contamination, The effect of improving accuracy

Active Publication Date: 2020-11-10
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0004] Due to the difficulties in direct sampling and measurement of radioactive gases, and the focus 133 The half-life of Xe radioactive gas is short, so it is impossible to use HPGe gamma spectrometer directly 133 For the measurement and analysis of the activity of Xe radioactive sampling gas, in order to accurately measure the activity of the discharged radioactive gas, it is necessary to develop a radioactive gas sampler that is exactly the same in geometry, size and sample container material as the actual radioactive gas sampler, and the density of the selected matrix material is the same as that of the actual sampling sample. Gas simulation standard source with similar density

Method used

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Embodiment Construction

[0031] The specific embodiments of the present invention will be further described below.

[0032]The preparation method of the radioactive gas simulation standard source of the present invention is to add an adhesive to the surface of the matrix material for 1.5-3 minutes, and then drop a radioactive solution with known specific activity to the surface of the matrix material, thereby preparing a radioactive gas simulation standard source. Standard source, and the radial and axial uniformity inspections are carried out on the prepared radioactive gas simulation standard source.

[0033] The research process of preparation method of the present invention is divided into following four main parts:

[0034] 1. Selection of matrix material

[0035] The sample for on-line measurement is radioactive gas, and the selection principle of the gas simulation standard source matrix material is that its density should be as close as possible to the density of the sampled gas. When the de...

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Abstract

The invention belongs to the technical field of radioactive substance detection and relates to a method for preparing a radioactive gas simulation standard source. According to the method, an adhesiveis added to the surface of a matrix material for 1.5 to 3 minutes, then a radioactive solution with a known and accurate specific activity is added dropwise to the surface of the matrix material, andtherefore, the radioactive gas simulation standard source is prepared. By using the method for preparing a radioactive gas simulation standard source of the invention, the radioactive gas simulationstandard source can be prepared well.

Description

technical field [0001] The invention belongs to the technical field of radioactive substance detection, and relates to a preparation method of a radioactive gas analog standard source. Background technique [0002] Nuclear facilities and the use of nuclear technology will emit radioactive gases into the atmosphere. In order to monitor whether the activity of the discharged radioactive gases meets the emission requirements, it is necessary to measure and analyze the radioactivity of the discharged gases. In the measurement and analysis of radioactive gases, HPGe gamma spectrometry is usually used to monitor the radioactive gases in the exhaust stream of reactor chimneys. In the gamma spectrometer method, gas sampling is first performed by a gas sampler, and then the radioactivity of the sampled gas is measured and analyzed by a gamma spectrometer. [0003] Radionuclide activity is a source term for evaluating environmental quality, and accurate measurement of the activity of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T7/02G01T1/36
CPCG01T1/36G01T7/02
Inventor 杨巧玲郭晓清吕晓侠刁立军姚顺和姚艳玲孟军邢雨
Owner CHINA INSTITUTE OF ATOMIC ENERGY