CN219978537U - MPPC-based radioactive waste barrel surface alpha beta ray detector - Google Patents
MPPC-based radioactive waste barrel surface alpha beta ray detector Download PDFInfo
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- CN219978537U CN219978537U CN202321552434.3U CN202321552434U CN219978537U CN 219978537 U CN219978537 U CN 219978537U CN 202321552434 U CN202321552434 U CN 202321552434U CN 219978537 U CN219978537 U CN 219978537U
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- mppc
- radiation detector
- scintillator
- radioactive waste
- rays
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- 239000002901 radioactive waste Substances 0.000 title claims abstract description 34
- RFVFQQWKPSOBED-PSXMRANNSA-N 1-myristoyl-2-palmitoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)O[C@@H](COP([O-])(=O)OCC[N+](C)(C)C)COC(=O)CCCCCCCCCCCCC RFVFQQWKPSOBED-PSXMRANNSA-N 0.000 title claims abstract 13
- 230000005250 beta ray Effects 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000004065 semiconductor Substances 0.000 claims abstract description 11
- 230000003595 spectral effect Effects 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims description 40
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 230000005260 alpha ray Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 239000005083 Zinc sulfide Substances 0.000 claims description 5
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 4
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000001228 spectrum Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002354 radioactive wastewater Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The utility model provides a detector for measuring alpha beta on the surface of a radioactive waste barrel based on MPPC, which comprises: a scintillator and semiconductor photodetector MPPC array; the scintillator receives alpha rays and beta rays emitted by the radioactive waste liquid, and converts the rays into light in a spectral region which can be received by the MPPC; the MPPC receives light emitted from the scintillator and converts it into electrical signals corresponding to the intensities of the alpha rays and the beta rays. The technical scheme of the utility model has the following advantages: the method can be used for energy spectrum measurement of low-level environmental samples and monitoring nuclides releasing alpha rays as main components.
Description
Technical Field
The utility model belongs to the technical field of radiation detection, and relates to an alpha beta ray detector based on an MPPC (maximum power point tracking) radioactive waste barrel surface.
Background
With the construction of a large number of domestic nuclear power plants, the method is completed and put into commercial application. The application of the low-background alpha-ray and beta-ray measuring device is rapidly increased, the measuring requirement on radioactive wastewater is further refined and accurate, and further the direct reading is required to obtain the alpha-ray and beta-ray activity measurement in a radioactive ray sample, so that the qualitative analysis result of the nuclide species is obtained, and the device is a necessary device for environmental monitoring.
Conventional surface contamination αβ measurement instruments use photomultiplier tubes (PMTs) as light detectors. Because PMT is relatively bulky, photomultiplier tubes are glass articles and are typically of a bulkSo that the radiation detecting apparatus made of it is also large.
What customers need to measure is alpha contamination of the cylindrical waste bin surface, and conventional high volume surface contamination meters are extremely inefficient to detect such bins due to the alpha particle range in air of less than 10 mm.
Disclosure of Invention
To solve the above technical problem, a first aspect of the present utility model provides an MPPC-based radioactive waste drum surface αβ radiation detector, the radiation detector comprising: a scintillator and semiconductor photodetector MPPC array;
the scintillator receives alpha rays and beta rays emitted by the radioactive waste liquid, and converts the ray energy into light energy in a spectral region which can be received by the MPPC;
the MPPC receives light emitted from the scintillator and converts it into electrical signals corresponding to the intensities of the alpha rays and the beta rays.
According to the radiation detector disclosed by the first aspect of the utility model, the scintillator is in a sheet shape and can be attached to the surface of the radioactive waste barrel, and the thickness of the scintillator is 0.5-1.2mm.
According to the radiation detector of the first aspect of the utility model, the thickness of the scintillator is 1mm, and the material is: plastic sheet coated with zinc sulfide.
The radiation detector according to the first aspect of the present utility model, the MPPC array includes at least one ion-implanted passivation silicon detector.
According to the radiation detector of the first aspect of the utility model, the MPPC array is formed by parallelly splicing n silicon photomultiplier tubes with the diameter of 6mm and the diameter of 6mm, wherein n is more than or equal to 2.
The radiation detector according to the first aspect of the present utility model further includes: light-shielding aluminum film, electronic device, display device, handle and shell;
the light-shielding aluminum film is attached to the scintillator in the directions of alpha rays and beta rays, and completely covers the detection end face of the ray detector and is used for shielding external stray light;
the electronic device forms a signal processing circuit of the MPPC array, corresponding alpha ray and beta ray intensities are calculated, and a calculation result is displayed by the display device;
the shell is used for wrapping and fixing the scintillator, the MPPC array, the electronic device and the display device;
the handle is a long grip structure connected to the housing.
According to the radiation detector of the first aspect of the utility model, the thickness of the light-shielding aluminum film is as follows: 3-6 μm.
The radiation detector according to the first aspect of the present utility model, wherein the electronic device comprises an amplifier and a data processor; the display device includes a liquid crystal display panel.
The radiation detector according to the first aspect of the present utility model, wherein the field of view of the radiation detector has a width: 10mm 600mm.
The technical scheme of the utility model has the following advantages: the method can be used for energy spectrum measurement of low-level environmental samples, in particular to monitoring nuclides releasing beta rays. According to the energy spectrum measured in real time, the nuclides possibly contained in the sample and focused by customers are identified, and the activity concentration of the corresponding nuclides can be given after the calibration.
Drawings
FIG. 1 is a schematic diagram of the general structure of an MPPC-based radioactive waste bin surface alpha beta ray detector of the present utility model;
fig. 2 is a schematic diagram of the combination of the utility model including a radioactive waste tank and an MPPC-based alpha beta radiation detector.
The device comprises an aluminum film 1, a scintillator 2, a light detector 3, an electronic device 4, a display device 5, a handle 6, a power connector 7, a housing 8, an alpha beta ray detector 9, a lead shielding shell 10, a radioactive waste liquid barrel 11, a radioactive waste liquid barrel housing 12 and a radioactive waste liquid flowing direction.
Detailed Description
The utility model provides an alpha beta ray detector for a radioactive waste liquid barrel, which uses a semiconductor light detector (MPPC) as a radioactivity detecting unit of the ray detector, further uses a semiconductor light detector to form an array so as to improve sensitivity and increase the area of a detection area, for example, a silicon photomultiplier (Silicon photomultiplier) spliced by 6mm is adopted to manufacture a detector array, and the semiconductor light detector can be made to be light and thin. Even the semiconductor photodetector can be manufactured into an alpha beta ray detector of the radioactive waste liquid barrel with the specific shape detection surface according to the requirement.
Based on a low background environment spectrometer, the long-rod type radioactive waste liquid barrel alpha ray beta ray measurement detector system developed by us has a detector field of about 10mm by 600mm, and can effectively solve the problem. The ion implantation type passivation silicon detector is adopted, and a real-time activity monitoring system which is specially customized and designed is combined with the actual monitoring requirement. The method can be used for energy spectrum measurement of low-level environmental samples, in particular to monitoring nuclides which release beta rays as main components. And identifying nuclides possibly contained in the sample and focused by customers according to the energy spectrum measured in real time, and giving the activity and activity concentration of the corresponding nuclides after calibration.
The following describes the embodiments of the present utility model in detail with reference to the drawings.
Fig. 1 shows a schematic diagram of a radioactive waste drum surface alpha-ray beta-ray detector based on a silicon photomultiplier (Silicon photomultiplier) which is a small instrument with a long handle held by a user to perform alpha-ray beta-ray detection in the vicinity of the radioactive waste drum surface. The radiation detector includes: the light-shielding aluminum film 1, the scintillator 2, the light detector 3, the electronic device and the display device 4, the handle 5, the power connector 6 and the shell 7. The long handle is internally provided with a power connector and a power line of an electronic device and a display device, and the ray detector is connected with an external power supply through the power connector. The radiation detector can be directly attached to the surface of the radioactive waste barrel to perform measurement.
The first aspect of the present utility model proposes an MPPC-based radioactive waste bin surface αβ radiation detector, said radiation detector comprising: a scintillator and semiconductor photodetector MPPC array;
the scintillator receives alpha rays and beta rays emitted by the radioactive waste liquid, and converts the ray energy into light energy in a spectral region which can be received by the MPPC;
the MPPC receives light emitted from the scintillator and converts it into electrical signals corresponding to the intensities of the alpha rays and the beta rays.
Wherein the scintillator thickness is 1mm, the output electric signal of the semiconductor photodetector is processed by the electronic component, and the detection result is displayed on the liquid crystal display of the housing.
The utility model adopts a semiconductor photodetector MPPC device to replace a photomultiplier, for example, an S133060/2050VE-6050VE photosensitive detector is used for splicing into a detector array of 6mm x 6 mm. The semiconductor photodetector MPPC device has the advantages that: the photodetector can be made very thin and lightweight. The detector is suitable for being flexibly manufactured into various special-shaped surfaces.
According to the radiation detector disclosed by the first aspect of the utility model, the scintillator is in a sheet shape and can be attached to the surface of the radioactive waste barrel, and the thickness of the scintillator is 0.5-1.2mm.
According to the radiation detector of the first aspect of the utility model, the thickness of the scintillator is 1mm, and the material is: plastic sheet coated with zinc sulfide.
A typical scintillator is made by spraying a layer of zinc sulfide (ZnS) onto a thin plastic sheet having a thickness of 1mm or less.
The radiation detector according to the first aspect of the present utility model, the MPPC array includes at least one ion-implanted passivation silicon detector.
According to the radiation detector of the first aspect of the utility model, the MPPC array is formed by parallelly splicing n silicon photomultiplier tubes with the diameter of 6mm and the diameter of 6mm, wherein n is more than or equal to 2. One preferred embodiment is: the MPPC array is formed by parallelly splicing 2-4 silicon photomultiplier tubes with the diameter of 6 mm.
The radiation detector according to the first aspect of the present utility model further includes: light-shielding aluminum film, electronic device, display device, handle and shell;
the light-shielding aluminum film is attached to the scintillator in the directions of alpha rays and beta rays, and completely covers the detection end face of the ray detector and is used for shielding external stray light;
the electronic device forms a signal processing circuit of the MPPC array, corresponding alpha ray and beta ray intensities are calculated, and a calculation result is displayed by the display device;
the shell is used for wrapping and fixing the scintillator, the MPPC array, the electronic device and the display device;
the handle is a long grip structure connected to the housing.
According to the radiation detector of the first aspect of the utility model, the thickness of the light-shielding aluminum film is as follows: 3-6 μm.
The radiation detector according to the first aspect of the present utility model, wherein the electronic device comprises an amplifier and a data processor; the display device includes a liquid crystal display panel.
The radiation detector according to the first aspect of the present utility model, wherein the field of view of the radiation detector has a width: 10mm 600mm.
Examples
As shown in fig. 2, this is a schematic diagram of a small radioactive waste tank and an MPPC-based alpha beta radiation detector placed on the housing of the waste tank.
The radioactive waste liquid flow direction 12 comprises an alpha beta ray detector 8, a lead shielding shell 9, a radioactive waste liquid barrel 10, a radioactive waste liquid barrel shell 11 and a radioactive waste liquid flow direction 12. The outside of the whole equipment is a lead shielding shell 9, a radioactive waste liquid barrel 10 with a thin wall is accommodated in the middle, an alpha beta ray detector 8 is clung to a radioactive waste liquid barrel shell 11, and radioactive waste liquid can flow in and out from a through hole in the middle of the radioactive waste liquid barrel 10.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the embodiment of the present utility model, and not for limiting, and although the embodiment of the present utility model has been described in detail with reference to the above-mentioned preferred embodiments, it should be understood by those skilled in the art that modifications and equivalent substitutions can be made to the technical solution of the embodiment of the present utility model without departing from the spirit and scope of the technical solution of the embodiment of the present utility model.
Claims (9)
1. An MPPC-based radioactive waste bin surface alpha beta radiation detector, characterized in that the radiation detector comprises: a scintillator and semiconductor photodetector MPPC array;
the scintillator receives alpha rays and beta rays emitted by the radioactive waste liquid, and converts the ray energy into light energy in a spectral region which can be received by the MPPC;
the MPPC receives light emitted from the scintillator and converts it into electrical signals corresponding to the intensities of the alpha rays and the beta rays.
2. The radiation detector of claim 1, wherein the scintillator is sheet-like and is capable of being attached to the surface of the radioactive waste bin, and the thickness of the scintillator is 0.5-1.2mm.
3. The radiation detector of claim 2, wherein the scintillator has a thickness of 1mm and comprises: plastic sheet coated with zinc sulfide.
4. The radiation detector of claim 1, wherein the MPPC array comprises at least one ion-implanted passive silicon detector.
5. The radiation detector of claim 4, wherein the MPPC array is formed by juxtaposing n 6mm x 6mm silicon photomultiplier tubes, wherein n is greater than or equal to 2.
6. The radiation detector of claim 1, wherein said radiation detector further comprises: light-shielding aluminum film, electronic device, display device, handle and shell;
the light-shielding aluminum film is attached to the scintillator in the directions of alpha rays and beta rays, and completely covers the detection end face of the ray detector and is used for shielding external stray light;
the electronic device forms a signal processing circuit of the MPPC array, corresponding alpha ray and beta ray intensities are calculated, and a calculation result is displayed by the display device;
the shell is used for wrapping and fixing the scintillator, the MPPC array, the electronic device and the display device;
the handle is a long grip structure connected to the housing.
7. The radiation detector of claim 6, wherein said light-shielding aluminum film has a thickness of: 3-6 μm.
8. The radiation detector defined in claim 6, wherein the electronics comprise an amplifier and a data processor; the display device includes a liquid crystal display panel.
9. The radiation detector of claim 1, wherein the radiation detector has a field of view width: 10mm 600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321552434.3U CN219978537U (en) | 2023-06-16 | 2023-06-16 | MPPC-based radioactive waste barrel surface alpha beta ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321552434.3U CN219978537U (en) | 2023-06-16 | 2023-06-16 | MPPC-based radioactive waste barrel surface alpha beta ray detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219978537U true CN219978537U (en) | 2023-11-07 |
Family
ID=88589197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321552434.3U Active CN219978537U (en) | 2023-06-16 | 2023-06-16 | MPPC-based radioactive waste barrel surface alpha beta ray detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219978537U (en) |
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2023
- 2023-06-16 CN CN202321552434.3U patent/CN219978537U/en active Active
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