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On-line measuring device and measuring method for radioactivity in drinking water

A measurement method and technology of measurement device, which are applied in the direction of measurement device, radiation measurement, X/γ/cosmic radiation measurement, etc., to achieve the effect of overcoming the inability to continuously monitor

Pending Publication Date: 2021-10-29
SHENYANG INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no well-established on-line monitoring method for permanent monitoring of drinking water systems

Method used

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  • On-line measuring device and measuring method for radioactivity in drinking water
  • On-line measuring device and measuring method for radioactivity in drinking water
  • On-line measuring device and measuring method for radioactivity in drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1-Figure 6 As shown, the present embodiment proposes an on-line measurement device for radioactivity in drinking water, including a measurement chamber 3, a detector 4, a light guide 5, a photomultiplier tube 6 and a data processing device 7, wherein the measurement chamber 3 is in the shape of a drum, and the measurement The inner wall of the chamber 3 is pasted with aluminum foil, and the top of the measuring chamber 3 is covered with a light-transmitting plate 31 made of glass. The measuring chamber 3 also has a water inlet 32 ​​for inputting drinking water and a water outlet 33 for discharging drinking water. The detector 4 Made of a plastic scintillator, the detector 4 includes an outer ring 41 and an inner ring group 42, wherein the outer ring 41 is cylindrical, and the outer ring 41 divides the inside of the measurement chamber 3 into two independent chambers, and the inner ring group 42 has It is composed of several nested annular bodies, and a c...

Embodiment 2

[0030] An on-line radioactivity measurement method in drinking water, using the on-line radioactivity measurement device in drinking water in Example 1, the drinking water is input into the measurement chamber 3 through the water inlet 32 ​​through the peristaltic pump 2, the drinking water flows through the detector 4, The α and β particles emitted by the decay of radionuclides in the drinking water interact with the detector 4 to generate fluorescence, a part of the fluorescence directly passes through the glass on the top of the measurement chamber 3 and enters the light guide 5, and the other part is reflected by the aluminum foil on the inner wall of the measurement chamber 3 Entering into the light guide 5, the fluorescence is transmitted to the photomultiplier tube 6 through the light guide 5, converted into photoelectrons at the photocathode, and the photoelectrons are multiplied in the photomultiplier tube 6, finally obtaining nuclear signals that can be processed by th...

Embodiment 3

[0038] Embodiment 3 In combination with Embodiment 1 and Embodiment 2, the specific use process and effect of the measurement device and measurement method are described in detail.

[0039] Water sample collection: The drinking water supply system 1 and the measurement room 3 are designed in the water sample collection part to realize the online collection and discharge of drinking water. The sampling pipeline mainly completes the collection function of drinking water, and its realization principle is as follows: figure 2 As shown, a water pipe is connected to the drinking water supply system 1, and the drinking water is collected to the measuring chamber 3 through the peristaltic pump 2. The top of the measurement chamber 3 is a glass light-transmitting plate 31, and other parts are made of ABS plastics. A layer of aluminum foil is adhered to the inner wall of the measurement chamber 3 (transparent at the top), which can isolate the interference of the outside world to the ...

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Abstract

The invention discloses an on-line measurement method for radionuclides in drinking water. The method comprises three parts of water sample collection, radioactivity measurement and data processing. The water sample collecting part can be used for continuously collecting drinking water into the measuring chamber; the radioactive measurement part can rapidly and accurately measure alpha, beta and gamma radionuclide pollutants in drinking water; and the data processing part is used for processing the obtained nuclear signals in real time, selecting interested signal amplitude spectrums for analysis, and automatically giving an alarm when the counting rate of the signals exceeds a threshold value or the counting rate exceeds a certain degree along with time change. The online measurement method solves the problems that a conventional monitoring method of a water system cannot detect short-term pollution, cannot continuously monitor radioactive pollution of the water system and cannot directly judge whether drinking water is polluted or not. The invention further provides a device for measuring the radioactivity in the drinking water on line.

Description

technical field [0001] The invention relates to the field of radionuclide measurement, in particular to an on-line measurement device and method for radioactivity in drinking water. Background technique [0002] Ingestion of radionuclides is one of the ways in which the human body is exposed to radiation, and large intakes of radionuclides increase the risk of cancer, so ensuring a safe water supply is of paramount importance to public health. Drinking water systems are susceptible to contamination by radioactive substances due to accidents or human accidents. Routine monitoring methods for water systems (sampling at regular intervals for laboratory analysis) cannot detect short-term contamination and therefore do not protect people from radiation exposure. In order to monitor radioactive contamination of water systems caused by nuclear accidents, on-site on-line measurements are required to quickly and accurately assess alpha, beta, and gamma radionuclide contamination. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/203G01N21/64
CPCG01T1/167G01T1/203G01N21/6428G01N21/643
Inventor 覃国秀潘靓亮李凡关百尧
Owner SHENYANG INST OF ENG
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