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Radionuclide monitoring system

A radionuclide and monitoring system technology, applied in radiation measurement, X/γ/cosmic radiation measurement, measurement device, etc. The effect of labor intensity, improving timeliness and stability, and high degree of automation

Pending Publication Date: 2020-12-22
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

The microcolumn packing material used is A mixture of 620 solid phase extraction particles and BC-400 plastic scintillation particles. During use, the two particles will continue to stratify due to different specific gravity, resulting in unstable detection efficiency, which will affect the monitoring results.
[0004] Therefore, this online monitoring technology is currently limited to laboratory research and has not been really applied

Method used

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  • Radionuclide monitoring system

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Embodiment Construction

[0019] The exemplary radionuclide monitoring system of the present invention is based on head-on chromatographic technology, and the signal intensity is related to the sample concentration, and is used for online continuous real-time monitoring of water 90 The concentration of Sr, whose composition is as figure 1 As shown, it includes an enrichment column 1 , a peristaltic pump 2 , a photomultiplier tube 3 , a preamplifier 4 , an amplifier 5 , a discriminator 6 , and a scaler 8 .

[0020] enrichment column 1 The body material of the scintillator is a plastic scintillator (BC-400 plastic scintillator, the external size is L12mm×W12mm×H50mm), the surface of the plastic scintillator is coated with a reflective layer, and there is a channel with an inner diameter of 2-4mm and a height of 30mm in the middle of the interior. Used to fill dual-functional resin materials. Both ends of the channel are threaded joints for connection with external liquid transmission pipelines. The p...

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Abstract

The invention belongs to the technical field of radioactivity monitoring, and relates to a radionuclide monitoring system. The monitoring system comprises an enrichment column, a photomultiplier, a discriminator and a calibrator, the body material of the enrichment column is a plastic scintillator, the surface of the plastic scintillator is coated with a reflecting layer, and a pore passage is formed in the middle of the interior of the plastic scintillator and used for loading a bifunctional resin material; the photomultiplier is connected with the plastic scintillator in a direction perpendicular to the pore passage, and is used for converting a scintillation light signal generated by the plastic scintillator into an electric signal and transmitting the electric signal to the discriminator; and the discriminator transmits the accordant electric signals to the scaler to display the measurement counting rate after the discriminator performs accordant judgment. The radionuclide monitoring system can automatically and continuously analyze the concentration of radionuclide in nuclear facility liquid effluent or low-level radioactive wastewater.

Description

technical field [0001] The invention belongs to the technical field of radioactive monitoring, and relates to a monitoring system for radionuclide. Background technique [0002] 90 Sr is a radionuclide that is mainly monitored in liquid effluents of nuclear facilities and environmental water. The traditional analysis methods include sampling, laboratory separation, analysis and other steps, but it is time-consuming and time-sensitive. It is not suitable for nuclear emergency and field operations. Continuous monitoring of liquid effluents from nuclear facilities. [0003] In the late 1990s, the Pacific Northwest Laboratory of the United States and Clemson University jointly developed an online monitoring technology for groundwater and surface water around the radioactive waste repository. 99 Tc, 90 Continuous monitoring of radionuclides such as Sr. The basic principle is to 90 Sr and other radionuclides are selectively enriched on a micro-column, and the micro-column is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/203G01T1/208
CPCG01T1/167G01T1/203G01T1/208
Inventor 宋志君马鹏张生栋余振华王秀凤
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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