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Method and device for detecting concentration of uranium-containing liquid in uranium-containing pipelines

A detection method and liquid concentration technology, which are applied in the detection method and detection device field of uranium-containing liquid concentration in uranium-containing pipelines, to meet the needs of nuclear safety monitoring, accurate analysis, shortened analysis time and process

Pending Publication Date: 2018-11-23
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the patent search, no similar device and method for reducing the detection background of uranium content in pipelines have been found

Method used

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  • Method and device for detecting concentration of uranium-containing liquid in uranium-containing pipelines
  • Method and device for detecting concentration of uranium-containing liquid in uranium-containing pipelines

Examples

Experimental program
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Embodiment 1

[0051] A method for detecting the concentration of uranium-containing liquid in a uranium-containing pipeline, comprising the following steps

[0052] a Establishing a calculation model of the count rate of gamma rays emitted by the uranium-containing liquid in the uranium-containing pipeline 1;

[0053] b. Inject uranium-containing solutions with different uranium concentrations into the uranium-containing pipeline 1, detect gamma rays emitted by the uranium-containing solution through the main detector 3 installed on the uranium-containing pipeline 1, and obtain the count rate of gamma rays at each concentration;

[0054] c. Taking the uranium concentration of the uranium-containing solution added in step b as the abscissa, and taking the gamma ray count rate corresponding to each uranium concentration obtained in step b as the ordinate, to establish a relationship curve between the count rate and the uranium concentration;

[0055] d. Carry out least squares fitting to the ...

Embodiment 2

[0073] like Figure 1-2 As shown, a device for realizing the detection method of Embodiment 1 includes a main detector 3 installed on the uranium-containing pipeline 1, an anti-coincidence detector 2 wrapped around the periphery of the main emitter 3, and the main detector 3 is used to receive the uranium-containing The gamma rays emitted by the uranium liquid are counted, and the anti-coincidence detector 2 is used to receive and count the gamma rays emitted by the environment background.

[0074] Wherein, the main detector 3 includes a first photomultiplier tube 4, and the gamma rays received by the main detector 3 are counted after photoelectric conversion by the first photomultiplier tube 4; the anticoincidence detector 2 includes a second photomultiplier tube 5, The gamma rays received by the anti-coincidence detector 2 are counted after being photoelectrically converted by the second photomultiplier tube 5, and the counting results of the main detector 3 and the counting...

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Abstract

The invention discloses a method and a device for detecting the concentration of uranium-containing liquid in uranium-containing pipelines. The method comprises the following operating steps: (a) establishing a counting rate calculation model of gamma rays emitted by the uranium-containing liquid in the uranium-containing pipelines; (b) injecting the uranium-containing liquid with different uranium concentrations into the uranium-containing pipelines to obtain counting rates of the gamma rays under the different concentrations; (c) establishing a relation curve between the counting rates and the uranium concentrations by using the uranium concentrations of the uranium liquid as horizontal ordinates and using the counting rates of the gamma rays corresponding to all the uranium concentrations as vertical coordinates; (d) acquiring a standard curve of the uranium concentrations based on the least square fit of the relation curve obtained in the step (c); (e) determining the counting rateof the gamma ray emitted by the uranium-containing liquid to be tested according to the counting rate model obtained in the step (a) and the standard curve of the uranium concentrations obtained in the step (d). According to the technical scheme, the detection method adopts real-time detection, is short in whole detection time and simple to operate, has significantly improved stability and accuracy, and meets the requirements for nuclear safety monitoring in pilot scale and mass production.

Description

technical field [0001] The invention relates to the technical field of nuclear detection / nuclear analysis, in particular to a detection method and a detection device for the concentration of uranium-containing liquid in a uranium-containing pipeline. Background technique [0002] Fuel element development and spent fuel reprocessing are very important links in the nuclear industry system and the core work of the nuclear fuel cycle. Among them, the chemical conversion of uranium is a key link in the development of fuel microspheres, which provides the necessary fuel phase for the manufacture of fuel veneers, directly affects the progress of the development of fuel elements, and is also related to the closed balance of nuclear materials; spent fuel Reprocessing is the last link of the nuclear industry system, which directly determines the safety of nuclear engineering. [0003] In the process of its process conversion, the uranium concentration value of the uranium-containing ...

Claims

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Application Information

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IPC IPC(8): G01N23/00G01T1/167G01T1/18
CPCG01N23/00G01T1/167G01T1/18
Inventor 赵峰廖志海彭小明孙超乔洪波
Owner NUCLEAR POWER INSTITUTE OF CHINA
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