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Online continuous gas sampling radioactivity measuring device

A radioactivity measurement and gas technology, applied in the field of nuclear power, can solve problems such as the inability to realize β and γ correlation measurement, single type of detection rays, etc., and achieve the effect of improving the detection limit and low radioactivity detection

Inactive Publication Date: 2019-03-19
NUCLEAR POWER INSTITUTE OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing β-detection continuous sampling device and γ-detection continuous sampling device detect a single type of radiation, and it is impossible to measure two different types of radiation, β and γ, on the same sample at the same time, and it is impossible to realize β , γ-correlation measurement, the purpose is to provide a radioactivity measurement device for gas online continuous sampling, to solve the above problems

Method used

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  • Online continuous gas sampling radioactivity measuring device

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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the present invention is a radioactive measuring device for gas on-line continuous sampling, including a β detector cathode 3, a β detector anode 5 and a γ detector 7; the β detector cathode 3 is a hollow spherical shell structure, and the The beta detector anode 5 is a sphere; the beta detector anode 5 is arranged in the beta detector cathode 3, and the spherical center of the beta detector anode 5 coincides with the spherical center of the beta detector cathode 3; the beta detector The cathode 3 is insulated from the anode 5 of the β detector, and the γ detector 7 is arranged outside the cathode 3 of the β detector.

[0029] When this embodiment is implemented, the β radiation detector adopts a spherical structure, the anode and the cathode of the radiation detector are spherical, the cathode is a large spherical shell, the anode is a small sphere, the anode sphere is located inside the cathode spherical shell, and the anode and cathode are ...

Embodiment 2

[0031] On the basis of Embodiment 1, the present embodiment also includes a gamma signal processing module 1 electrically connected to the gamma detector 7; the gamma signal processing module provides power for the gamma detector 7 and receives and processes the gamma collected by the gamma detector 7 Radiation signal.

[0032] During the implementation of this embodiment, the gamma particles will pass through the spherical shell of the beta detector cathode 3 and enter the gamma detector 7. The corresponding γ particle information is displayed.

Embodiment 3

[0034] On the basis of Embodiment 1, this embodiment also includes a β signal processing module 4 electrically connected to the β detector cathode 3 and the β detector anode 5; the β signal processing module 4 detects the β detector cathode 3 and β The detector anode 5 supplies power, and receives and processes the β radiation signal collected by the β detector cathode 3 or / and the β detector anode 5 . The β signal processing module 4 adds a DC high voltage to the β detector cathode 3 and the β detector anode 5 so that the β detector cathode 3 and the β detector anode 5 form a bias electric field.

[0035] When this embodiment is implemented, because of the spherical structure, all β particles generated in the sampling chamber can output corresponding β signals in the β signal processing module 4 , thus having a detection solid angle of 4π.

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Abstract

The invention discloses an online continuous gas sampling radioactivity measuring device which comprises a beta detector cathode, a beta detector anode and a gamma detector. The beta detector cathodeis of a hollow spherical shell structure, and the beta detector anode is a sphere; the beta detector anode is arranged in the beta detector cathode, and the sphere center of the beta detector anode coincides with the sphere center of the beta detector cathode; the beta detector cathode is insulated from the beta detector anode, and the gamma detector is arranged outside the beta detector cathode.The online continuous gas sampling radioactivity measuring device has the advantages that the online continuous gas sampling radioactivity measuring device capable of continuously sampling and simultaneously measuring beta and gamma is designed by the aid of the characteristic that beta and gamma rays can be simultaneously emitted by measured gas during nuclide decay, and has 4 pi detection stereoscopic angles for beta particles, beta and gamma measuring channels are matched with one another, accordingly, beta-gamma coincidence or anticoincidence measurement can be implemented, low radioactivity can be detected by the online continuous gas sampling radioactivity measuring device, and the lower limit of gas radioactivity detection can be improved during weak radioactivity measurement.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a radioactive measuring device for online continuous gas sampling. Background technique [0002] In the measurement of radioactivity, the measurement of radioactive gas often adopts the method of continuous sampling and analysis, and the charged particles such as β rays or uncharged particles such as γ rays emitted by radioactive gases during the decay process are used for measurement. The existing gas radioactivity measurement adopts a single particle type measurement method. Whether it is to measure charged particles or uncharged particles, due to environmental and other factors, objectively, the activity measurement device has a lower detection limit, which cannot be detected under current working conditions. Further improve the lower detection limit of the device. In some weak radioactivity measurements, such as on-line detection of fuel damage in nuclear power plants,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01T1/167
CPCG01N1/22G01T1/167
Inventor 曾勇谷明非李卫东
Owner NUCLEAR POWER INSTITUTE OF CHINA
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