CN216411577U

CN216411577U - Cerium bromide scintillation detection device

Info

Publication number: CN216411577U
Application number: CN202121641843.1U
Authority: CN
Inventors: 郭生良; 葛良全; 余鹏; 罗明涛
Original assignee: Chengdu Newray Technology Co ltd
Current assignee: Chengdu Newray Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-04-29
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a cerium bromide scintillation detection device, which comprises a shell, a cerium bromide detection array crystal, a photomultiplier and an optical gasket; the shell is in a top opening shape; the photomultiplier and the cerium bromide detection array crystal are respectively and fixedly arranged at the upper end and the lower end inside the shell, and the cerium bromide detection array crystal and the photomultiplier are fixedly connected through an optical gasket. The cerium bromide scintillation detection device has good sealing performance, can effectively reduce the pollution of the outside to the whole detection device, and has the anti-seismic and buffering effects.

Description

Cerium bromide scintillation detection device

Technical Field

The utility model belongs to the technical field of radioactivity detection, and particularly relates to a cerium bromide scintillation detection device.

Background

With the scale expansion of nuclear energy and the wide application of non-power nuclear technology in China, the pressure of radioactive effluents of nuclear facilities to be discharged to the natural environment increases day by day, and the radioactivity level of inland storage water bodies becomes an important object for the supervision and monitoring of the radiation environment around the nuclear facilities by public concerns and environmental protection departments. In radioactive contamination of water environments, radioactive waste generated by nuclear facilities is a major source of liquid radioactive effluents. Nuclear explosion tests, nuclear accidents, uranium mine mining, sorting and smelting processing, spent fuel post-treatment, radioisotope production and application and nuclear technology utilization all generate radioactive wastes to different degrees. Although the monitoring object is gradually brought into the radiation environment monitoring range, the conventional mode of regular sampling and laboratory analysis is still adopted to carry out radioactivity monitoring at present, the analysis period is long, the operation is complex, the timeliness of sample representation is poor, the timely early warning and monitoring of a monitoring basin are difficult to realize, and the nuclear emergency activity is delayed. The on-line gamma energy spectrum measurement technology is adopted to continuously monitor the activity concentration and the radioactivity level of the nuclear element in the water body in real time, so that the nuclear facility accident/event can be effectively early warned in time, the emergency efficiency of the nuclear accident can be greatly improved, and the public radiation safety and the social stability can be guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem of insufficient sensitivity of online radioactivity measurement and provides a cerium bromide scintillation detection device.

The technical scheme of the utility model is as follows: a cerium bromide scintillation detection device comprises a shell, a cerium bromide detection array crystal, a photomultiplier and an optical gasket;

the shell is in a top opening shape; the photomultiplier and the cerium bromide detection array crystal are respectively and fixedly arranged at the upper end and the lower end inside the shell, and the cerium bromide detection array crystal and the photomultiplier are fixedly connected through an optical gasket.

The utility model has the beneficial effects that:

(1) the cerium bromide scintillation detection device has good sealing performance, can effectively reduce the pollution of the outside to the whole detection device, and has the anti-seismic and buffering effects.

(2) This cerium bromide scintillation detection device improves detection device's detection precision and detection efficiency through connecting photomultiplier and array crystal, reduces the detection error, guarantees the luminousness of array crystal.

Further, the cerium bromide detection array crystal comprises three cerium bromide detectors, and the three cerium bromide detectors are arranged in a triangular shape.

Furthermore, the photomultiplier is fixedly arranged at the upper end inside the shell in a sticking way.

The beneficial effects of the further scheme are as follows: in the utility model, the connection of the crystal and the optical multiplier can improve the detection performance and the detection precision of the crystal.

Furthermore, the material of the optical gasket is transparent optical rubber.

The beneficial effects of the further scheme are as follows: in the utility model, the optical backing plate can effectively separate the cerium bromide detection array crystal from the photomultiplier tube, and prevent the viscose between the cerium bromide detection array crystal and the photomultiplier tube from polluting the array crystal.

Further, the outside of the cerium bromide detection array crystal is covered with a sealing layer.

Furthermore, the sealing layer is made of polytetrafluoroethylene tape.

The beneficial effects of the further scheme are as follows: in the utility model, two ends of the polytetrafluoroethylene tape are bonded to form a sealing ring, and the sealing ring covers the surface of the crystal to form a closed space.

Furthermore, an alloy is fixedly arranged on the outer wall of the photomultiplier.

The beneficial effects of the further scheme are as follows: in the utility model, the alloy material can be fixed on the outer wall of the photomultiplier in a winding way, and has the effect of magnetic shielding.

Drawings

FIG. 1 is a block diagram of a cerium bromide scintillation detection apparatus;

in the figure, 1, a housing; 2. detecting the array crystal by cerium bromide; 3. a photomultiplier tube; 4. an optical gasket.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a cerium bromide scintillation detection device, which comprises a housing 1, a cerium bromide detection array crystal 2, a photomultiplier tube 3 and an optical spacer 4;

the shell 1 is in a top opening shape; photomultiplier 3 and cerium bromide detect array crystal 2 and fix respectively in the inside upper end of casing 1 and lower extreme, and cerium bromide detects array crystal 2 and photomultiplier 3 and passes through optical gasket 4 fixed connection.

In the embodiment of the present invention, as shown in fig. 1, the cerium bromide detecting array crystal 2 includes three cerium bromide detectors, and the three cerium bromide detectors are arranged in a triangular shape.

In the embodiment of the present invention, the photomultiplier tube 3 is fixedly disposed at the upper end inside the housing 1 by means of adhesion.

In the utility model, the connection of the crystal and the optical multiplier can improve the detection performance and the detection precision of the crystal.

In the embodiment of the present invention, the material of the optical gasket 4 is transparent optical rubber.

In the utility model, the optical backing plate can effectively separate the cerium bromide detection array crystal from the photomultiplier tube, and prevent the viscose between the cerium bromide detection array crystal and the photomultiplier tube from polluting the array crystal.

In the present embodiment, the outside of the cerium bromide detection array crystal 2 is covered with the sealing layer 5.

In the embodiment of the present invention, the material of the sealing layer 5 is teflon tape.

In the utility model, two ends of the polytetrafluoroethylene tape are bonded to form a sealing ring, and the sealing ring covers the surface of the crystal to form a closed space.

In the embodiment of the present invention, the outer wall of the photomultiplier tube 3 is fixedly provided with an alloy.

In the utility model, the alloy material can be fixed on the outer wall of the photomultiplier in a winding way, and has the effect of magnetic shielding.

The working principle and the process of the utility model are as follows: the cerium bromide detection array crystal 2 is placed in the shell 1, the photomultiplier 3 is placed on the cerium bromide detection array crystal 2, and the detection performance and the detection precision of the array crystal can be greatly improved as the cerium bromide detection array crystal 2 is connected with the photomultiplier 3. The water radioactivity detection device of the cerium bromide scintillation counter collects water radioactivity data through the cerium bromide detection array crystal 2 and the photomultiplier 3, and three cerium bromide detectors are placed in a shape like a Chinese character 'pin', so that the problem of insufficient sensitivity of online measurement is solved. The photomultiplier 3 is arranged at the opening of the shell 1 to form a closed cavity for holding the crystal, so that the inside of the shell 1 is isolated from the outside air, the crystal is only leaked towards one end of the photomultiplier 3, the transmittance of the crystal is improved, and the cerium bromide detection array crystal 2 is used for detection.

The utility model has the beneficial effects that:

It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the utility model and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the utility model, and these changes and combinations are within the scope of the utility model.

Claims

1. A cerium bromide scintillation detection device is characterized by comprising a shell (1), a cerium bromide detection array crystal (2), a photomultiplier (3) and an optical gasket (4);

the shell (1) is in a top opening shape; photomultiplier (3) and cerium bromide detect array crystal (2) and fix respectively and set up in the inside upper end of casing (1) and lower extreme, just cerium bromide detects array crystal (2) and photomultiplier (3) and passes through optical gasket (4) fixed connection.

2. The cerium bromide scintillation detection device of claim 1, wherein said cerium bromide detection array crystal (2) comprises three cerium bromide detectors, and the three cerium bromide detectors are arranged in a triangular shape.

3. The cerium bromide scintillation detection device of claim 1, wherein said photomultiplier (3) is fixedly mounted in the upper end of the interior of the housing (1) by means of gluing.

4. The cerium bromide scintillation detection device of claim 1, wherein the material of said optical spacer (4) is transparent optical rubber.

5. The cerium bromide scintillation detection device of claim 1, wherein the outside of said cerium bromide detection array crystal (2) is covered with a sealing layer (5).

6. The cerium bromide scintillation detection device of claim 5, wherein said sealing layer (5) is made of Teflon tape.

7. The cerium bromide scintillation detection device of claim 1, wherein an alloy is fixedly arranged on the outer wall of the photomultiplier (3).