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On-line uranium plutonium measurement device in bench test 1AP

A measuring device and bench test technology, which is applied in the field of radioactive analysis, can solve problems such as thin pipelines, small sample flow rates, and high uranium concentration measurement results, and achieve high measurement accuracy, avoid air bubbles, and ensure measurement results.

Active Publication Date: 2013-07-10
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current on-line measurement methods used in the pilot plant include γ-absorption measurement of uranium concentration and spontaneous X-ray measurement of plutonium concentration, but γ-absorption measurement actually measures the total concentration of uranium and plutonium, resulting in high uranium concentration measurement results; spontaneous X-ray measurement Plutonium concentration is determined by the method, but due to the influence of plutonium isotopic abundance, and there is no plutonium standard material calibration instrument, the plutonium concentration measurement result is unreliable
In addition, the current online measurement of the 1AP point is only the gamma absorption method, which cannot realize the simultaneous determination of the concentration of uranium and plutonium
[0003] As a non-destructive analysis, X-ray fluorescence analysis can be used for the simultaneous measurement of uranium and plutonium concentrations, but there is no report on its application in bench test 1AP online measurement
At the same time, there are some special difficulties in installing the X-ray fluorescence analyzer online measurement device on the bench: the sample flow rate is small, the pipeline is thin (3~5mm in diameter), the bypass cannot be opened, and the measuring instrument can only be installed in the hot chamber. Controlling the volume and geometry of the instrument increases the difficulty of online measurement of the instrument

Method used

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  • On-line uranium plutonium measurement device in bench test 1AP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An online measurement device for uranium and plutonium in the bench test 1AP, such as figure 1 The device includes an X-ray tube 2, a detector 1, an X-ray fluorescence analysis spectrometer 9, a power source 8, and a measuring tube 6. The key is that the detector 1 and the X-ray tube 2 are sealed in a stainless steel box 7. The X-ray tube The incident light of 2 passes through the primary window 3 on the stainless steel box 7 to illuminate the sample and the internal standard 5, and the emitted light from the sample and the internal standard 5 is received by the detector 1 through the secondary window 4 on the stainless steel box 7. The device used The internal standard 5 is a metal whose characteristic X-ray energy is between 10 and 15 keV.

[0031] The internal standard 5 is Y, the focal point of the incident light and the outgoing light is located at the center of the measuring tube 6, the internal standard 5 is close to the back of the measuring tube 6, and the center ...

Embodiment 2

[0045] The difference from Example 1 is that the selected internal standard 5 is Se, the thickness of the primary window 3 and the secondary window 4 are 0.3mm and 1mm, respectively, and the angle between the incident light and the exiting light is 60℃. The measurement accuracy of uranium and plutonium is high.

Embodiment 3

[0047] The difference from Example 1 is that the selected internal standard 5 is Zr, the thickness of the primary window 3 and the secondary window 4 are 1mm and 2mm, respectively, and the angle between the incident light and the exiting light is 70℃. Uranium and plutonium are measured with high accuracy.

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Abstract

The invention belongs to the technical field of radioanalysis, and discloses an on-line uranium plutonium measurement device in a bench test 1AP. The device comprises an X-ray tube (2), a detector (1), an X-ray fluorescence analytical spectrometer (9), a power supply (8) and a measurement tube (6), and is characterized in that the detector (1) and the X-ray tube (2) are sealed in a stainless steel box body (7); incident light rays of the X-ray tube (2) irradiate a sample and an inner label (5) through a primary window (3) on the stainless steel box body (7); emergent light rays of the sample and the internal label (5) are received by the detector (1) through a secondary window (4) on the stainless steel box body (7); and the internal label (5) used by the device serves as a metal of which the X ray has energy being between 10 and 15keV. The device can simultaneously measure the concentration of uranium plutonium in the bench test in an online manner.

Description

technical field [0001] The invention belongs to the technical field of radioactivity analysis, and in particular relates to an on-line measurement device for uranium and plutonium in bench test 1AP. Background technique [0002] In the process of reprocessing process research, it is necessary to obtain the data of uranium and plutonium concentration in 1AP in time, which is of great significance to the monitoring and control of process operation status. At present, the on-line measurement methods adopted by the pilot plant include γ-absorption measurement of uranium concentration and spontaneous X-ray measurement of plutonium concentration. However, γ-absorption measurement actually measures the total concentration of uranium and plutonium, resulting in high uranium concentration measurement results; spontaneous X-ray measurement However, due to the influence of plutonium isotopic abundance and the absence of plutonium standard material calibration instruments, the plutonium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
Inventor 康海英郑维明吴继宗宋游陈晨刘桂娇
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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