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A kind of inner gas detector measuring 85kr

A detector and plastic scintillator technology, which is applied in measurement devices, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problem of high detection limit and achieve the effect of optimizing structure design

Inactive Publication Date: 2019-01-15
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the problem that the detection limit of the gamma spectrometer measurement system is too high, the present invention provides an inner gas that reduces the detection limit by detecting beta rays 85 Kr detector

Method used

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  • A kind of inner gas detector measuring 85kr

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Embodiment Construction

[0013] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with each specific embodiment.

[0014] a measurement 85 Kr's inner gas detector embodiment:

[0015] see figure 1 , the present invention measures 85 Kr's inner gas detector, including gas processing module 1, valve 2, sampling and washing channel 3, shielding body 4, stainless steel shell 5, airtight sample chamber 6, reflective isolation film 7, plastic scintillator 8, optical coupler 9. Fastening interface 10, damping silica gel 11, photomultiplier tube 12, integrated nuclear electronics module 13, PC terminal 14.

[0016] The gas processing module 1 is connected to the sampling and washing channel 3 through the valve 2, and its function is to realize the 85 Sampling, enrichment and transfer of Kr gas; the valve 2 is installed on the sampling and washing channel 3, the valve is opened dur...

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Abstract

The invention discloses a gas-filled detector for measuring 85Kr, which comprises a valve, a stainless steel shell, a reflective isolation film, a plastic scintillator, an optical coupling agent, a photomultiplier tube and an integrated nuclear electronics module. The detector is mounted in a shield and a sample is enriched through a gas processing module and purified to fill a sealed sample chamber. Beta rays emitted by the 85Kr are collected by the plastic scintillator to form scintillation light which is amplified by the photomultiplier tube and then recorded by the integrated nuclear electronics module. After the recorded data are transmitted to a PC terminal, 85Kr activity information in the sample can be obtained by comparison and analysis with the background. Compared with the current gamma spectrometer measurement, the detector can reduce the detection limit of 85Kr by about three orders of magnitude. Compared with a conventional gas detector, the detector is insensitive to a change in the sample composition. The detector can be widely used in quantitative analysis of radioactive 85Kr in gaseous effluents of nuclear power plants.

Description

technical field [0001] The present invention relates to radioactive 85 The technical field of Kr measurement, especially relates to a method for radioactivity in the gaseous effluent of a nuclear power plant 85 Inner gas detector for Kr measurement. Background technique [0002] Nuclear energy is regarded as one of the most promising technological means to solve the energy crisis of mankind at present and in the future. Nuclear safety is an important guarantee for the healthy development of nuclear energy. For the daily operation of nuclear power plants, effluent discharge monitoring is an important measure to ensure nuclear safety. The national nuclear safety regulatory authorities and nuclear power plant operating units have always attached great importance to it, and have adopted various technical measures to monitor the artificial radionuclides in the effluent. However, due to the limitation of the development level of measurement means and measuring instruments, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/203
CPCG01T1/203
Inventor 曾军王红侠向永春郝樊华迮仁德向清沛罗飞胡根
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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