Measuring device for non-destructive and rapid analysis of micro-trace plutonium in solution
A rapid analysis, non-destructive technology, applied in measuring devices, radiation measurement, X / γ / cosmic radiation measurement, etc., can solve the problems of strict personnel safety requirements and high detection limit, shorten the sample analysis time and ensure effective Transfer, save the effect of sample handling preparation process
Inactive Publication Date: 2020-02-11
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology
Both α-single-channel counting and α-energy spectroscopy methods require cumbersome sample processing processes such as quantitative volumetric dripping, burning, and drying; while liquid scintillation analyzers need to add scintillation liquid to produce radioactive organic waste.
X-ray fluorescence method belongs to non-destructive analysis, but the instrument has more stringent requirements for X-ray protection and personnel safety, and the detection limit of the method is higher than that of α counting method
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] like figure 1 As shown, the present invention provides a non-destructive and rapid analysis of micro-trace plutonium measuring device in the solution, comprising a shielding cover 10, a measuring cup 9, a photomultiplier tube 16 and an outer cylinder shell 5; the shielding cover 10 and the The outer cylinder shell 5 cooperates to form a measurement chamber; the photomultiplier tube 16 and the measurement cup 9 are all arranged in the measurement chamber; the bottom of the measurement cup 9 is a new scintillator material, which cooperates with the photomultiplier tube 16 To ensure optical signal transmission. In addition to the function of the built-in photomultiplier tube 16, the outer cylindrical shell 5 is also provided with a photon reflection layer on its inner wall so as to have the function of a light-proof darkroom.
[0025] In this em...
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The invention relates to a measuring device for non-destructive and rapid analysis of micro-trace plutonium in a solution. The measuring device comprises a shielding cover, a measuring cup, a photomultiplier and an outer cylinder shell. The shielding cover cooperates with the outer cylinder shell to form a measuring chamber; and the photomultiplier and the measuring cup are both arranged in the measuring chamber. The bottom of the measuring cup is made of a novel scintillator material and the novel scintillator material cooperates with the photomultiplier to guarantee optical signal transmission. The measuring device has the following beneficial effects: firstly, measuring cup is based on a nested design, the structure is compact, the effective transmission of optical signals is guaranteedby cooperating with the novel scintillator material, the lower detection limit of the instrument is greatly reduced, the lower detection limit of plutonium can reach 10 <-6>g / L, the detection limit can be equal to that of the existing alpha counting method and far lower than the detection limit 10<-3>g / L of an X-ray fluorescence method; and secondly, the measuring cup can be used repeatedly aftersimple cleaning.
Description
technical field [0001] The invention belongs to the field of nuclear industry, in particular to a measuring device for non-destructive rapid analysis of trace plutonium in solution. Background technique [0002] In the process of spent fuel reprocessing, a large amount of raffinate and washing liquid contain micro / trace amounts of plutonium. By accurately measuring the content of plutonium in the process, the yield of plutonium can be calculated, the operation of the process can be mastered, and the whole Monitoring and control of post-treatment process operation. Therefore, accurate, convenient and rapid determination of plutonium concentration has always been the key to control analysis of reprocessing process. [0003] At present, the traditional α-counting method and X-ray fluorescence method are still used for economical and practical micro / trace plutonium analysis. The α counting method has high sensitivity, reliability and stability, and the sample usually needs to ...
Claims
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IPC IPC(8): G01T1/167G01T1/202
CPCG01T1/167G01T1/202
Inventor 刘联伟李辉波康海英熊超杰吴继宗常志远
Owner CHINA INSTITUTE OF ATOMIC ENERGY