CN117405707A - Nuclear waste packaging body dual-mode synchronous scanning detection device - Google Patents
Nuclear waste packaging body dual-mode synchronous scanning detection device Download PDFInfo
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- CN117405707A CN117405707A CN202311401713.4A CN202311401713A CN117405707A CN 117405707 A CN117405707 A CN 117405707A CN 202311401713 A CN202311401713 A CN 202311401713A CN 117405707 A CN117405707 A CN 117405707A
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- 239000002699 waste material Substances 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 101
- 238000013519 translation Methods 0.000 claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000005570 vertical transmission Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 20
- 238000004587 chromatography analysis Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 8
- 229910001369 Brass Inorganic materials 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000011824 nuclear material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000001730 gamma-ray spectroscopy Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/10—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
Abstract
The invention discloses a nuclear waste packaging body dual-mode synchronous scanning detection device, which comprises a rotating platform, wherein the rotating platform is connected with a rotating driving mechanism; a first lifting platform, a second lifting platform and a third lifting platform are arranged around the rotating platform, a translation platform is arranged on the first lifting platform, the translation platform is connected with a translation driving mechanism, and a single HPGe detector system is arranged on the translation platform; a transmission source and a collimator assembly are arranged on the second lifting platform; a matrix detector system is arranged on the third lifting platform; the matrix detector of the matrix detector system, the transmission source and collimator assembly, and the single HPGe detector of the single HPGe detector system are all oriented towards the rotating platform. Compared with the existing single HPGe detector, the invention has the advantages of remarkably improved working efficiency, low cost, economical efficiency and universality, remarkably improved scanning efficiency of TGS, shortened measurement time and improved chromatography gamma scanning speed.
Description
Technical Field
The invention belongs to the technical field of measurement and analysis of radioactivity of nuclear waste packages, and particularly relates to a dual-mode synchronous scanning detection device for nuclear waste packages.
Background
With the continued development and proliferation of the nuclear industry system, the problem of nuclear waste accumulation is becoming more and more prominent. An important problem faced in the field of nuclear safety guarantee and nuclear waste detection internationally is: how to accurately obtain the key technical parameters such as the nuclide type, the content and the like of the special nuclear materials in the nuclear waste. In view of the characteristics of special nuclear materials, such as the special characteristics and the difficulty in detection, how to realize the accurate qualitative and quantitative nondestructive detection analysis of the special nuclear materials in the nuclear waste has become one of the key scientific problems and technical difficulties of nuclear safety guarantee. Segmented gamma scanning and tomographic gamma scanning are two major support techniques for non-destructive analysis of nuclear waste, beginning in the 70-90 s of the last century. Compared with the SGS technology, the TGS technology is more advanced and more accurate, not only can carry out qualitative and quantitative calculation on the radioactivity of the nuclear waste, but also can obtain radioactivity distribution images, has more abundant reflected information and wider application prospect, and is one of main research directions for nondestructive testing of the nuclear waste at present. Although the TGS technology uses the medical CT and ECT principles, due to the characteristics of large volume of the nuclear waste package, uneven distribution of medium and nuclides, lack of prior information, etc., the γ scan analysis of the nuclear waste package has its own difficulties, in which the low scanning efficiency is one of the important reasons that the current TGS technology is limited in application.
At present, a TGS equipment detection system mainly adopts a single HPGe detector, and the scanning mode adopts step transmission measurement and emission measurement, so that the detection time is long and the efficiency is low. The use of an array of multiple detectors can significantly improve efficiency, but the array of HPGe detectors is expensive and requires refrigeration equipment to be assembled in the field.
Disclosure of Invention
The invention aims to provide a dual-mode synchronous scanning detection device for a nuclear waste packaging body, which is based on a dual-mode synchronous scanning detection mode of matrix scintillator detector emission measurement and single HPGe detector transmission measurement, and can obviously improve the scanning efficiency of TGS, shorten the measurement time and improve the tomographic gamma scanning speed while considering economy and universality.
The technical scheme adopted for solving the technical problems is as follows: the nuclear waste packaging body dual-mode synchronous scanning detection device comprises a rotating platform, wherein the rotating platform is connected with a rotating driving mechanism; a first lifting platform, a second lifting platform and a third lifting platform are arranged around the rotating platform, a translation platform is arranged on the first lifting platform, the translation platform is connected with a translation driving mechanism, and a single HPGe detector system is arranged on the translation platform; a transmission source and a collimator assembly are arranged on the second lifting platform; a matrix detector system is arranged on the third lifting platform; the matrix detector system, the transmission source and collimator assembly and the single HPGe detector system are all oriented towards the rotating platform, and the matrix detector system, the transmission source and collimator assembly and the single HPGe detector system are respectively located on three sides of the rotating platform, and the transmission source in the transmission source and collimator assembly is aligned with the center of the single HPGe detector in the single HPGe detector system.
Further, the dual-mode synchronous scanning detection device for the nuclear waste packaging body further comprises a first support frame, wherein a vertical first transmission screw rod is arranged on the first support frame, and the first transmission screw rod is connected with a first motor for driving the first transmission screw rod to rotate; the first lifting platform is in sliding fit with the first supporting frame in the vertical direction, and the first transmission screw rod is in threaded fit with the first lifting platform.
Further, be provided with vertical first guide post on the first support frame, the both sides of first guide post inwards are sunken to form the spout, the both ends of first lift platform are provided with first sliding sleeve, the inner wall of first sliding sleeve is provided with the lug, the lug of first sliding sleeve is located the spout of first guide post and with spout sliding fit.
Further, a horizontal second transmission screw rod is arranged above the first lifting platform, the second transmission screw rod is connected with a second motor, the translation platform is in sliding fit with the first lifting platform, and the translation platform is in threaded connection with the second transmission screw rod.
Further, the dual-mode synchronous scanning detection device for the nuclear waste packaging body further comprises a second support frame, wherein a vertical third transmission screw rod is arranged on the second support frame, and the third transmission screw rod is connected with a third motor for driving the third transmission screw rod to rotate; the second lifting platform is in sliding fit with the second supporting frame in the vertical direction, and the third transmission screw rod is in threaded fit with the second lifting platform.
Further, nuclear waste packaging body bimodulus synchronous scanning detection device, still include the third support frame, be provided with vertical fourth transmission lead screw on the third support frame, fourth transmission lead screw is connected with the fourth motor that drives fourth transmission lead screw pivoted, third lift platform and third support frame sliding fit in vertical direction, and fourth transmission lead screw and third lift platform screw thread fit.
Further, the upper surface of the second lifting platform is provided with a horizontal first guide rail, and the bottoms of the transmission source and the collimator assembly are in sliding fit with the first guide rail.
Further, the third lifting platform comprises a plurality of layers of horizontal mounting plates, a second guide rail is arranged on the upper surface of each layer of mounting plate, the matrix detector system comprises a plurality of scintillator detectors, and the bottom of each scintillator detector is in sliding fit with the second guide rail so as to adjust the distance between two adjacent scintillator detectors.
Further, the nuclear waste packaging body dual-mode synchronous scanning detection device also comprises a base, and the rotating platform, the first lifting platform, the second lifting platform and the third lifting platform are all installed on the base.
The beneficial effects of the invention are as follows: the single HPGe detector system and the matrix detector system are integrated, the single HPGe detector and the matrix detector system work synchronously, the working efficiency is obviously improved compared with the existing single HPGe detector, the manufacturing cost is low compared with the existing array type HPGe detector, the scanning efficiency of TGS can be obviously improved while the economy and universality are both considered, the measuring time is shortened, and the chromatography gamma scanning speed is improved.
Drawings
FIG. 1 is an overall schematic of the present invention;
FIG. 2 is a schematic diagram of a first lifting platform;
FIG. 3 is a schematic illustration of the engagement of the first guide post with the first sliding sleeve;
FIG. 4 is a schematic view of a translation stage;
FIG. 5 is a schematic view of a third lift platform;
FIG. 6 is a schematic view of the installation of a transmission source and collimator assembly;
FIG. 7 is a schematic view of a rotating platform;
fig. 8 is a schematic diagram of a scintillator detector.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, the nuclear waste packaging body dual-mode synchronous scanning detection device comprises a rotary platform 1, wherein the rotary platform 1 is connected with a rotary driving mechanism; a first lifting platform 2, a second lifting platform 3 and a third lifting platform 4 are arranged around the rotating platform 1, a translation platform 21 is arranged on the first lifting platform 2, the translation platform 21 is connected with a translation driving mechanism, and a single HPGe detector system 22 is arranged on the translation platform 21; the second lifting platform 3 is provided with a transmission source and collimator assembly 31; a matrix detector system 41 is arranged on the third lifting platform 4; the matrix detector system 41, the transmission source and collimator assembly 31 and the single HPGe detector system 22 are all directed towards the rotating platform 1.
The upper surface of the rotating platform 1 is horizontal, and is used for fixing the nuclear waste packaging body 100, the rotating platform 1 can rotate around the central line, specifically, a servo motor with a speed reducer can be adopted as a rotation driving mechanism, and the rotating platform 1 is driven to rotate for a specific angle each time, so that the nuclear waste packaging body 100 can be detected under a plurality of angles. In order to facilitate fixing the nuclear waste packaging body 100, as shown in fig. 7, four positioning clamping blocks are arranged on the rotating platform 1, and elements such as an air cylinder, a hydraulic cylinder or an electric cylinder can be used as power to drive the four positioning clamping blocks to linearly move, so that the four positioning clamping blocks clamp the side surface of the nuclear waste packaging body 100, and clamping and loosening of the nuclear waste packaging body 100 are realized.
The first lifting platform 2 and the second lifting platform 3 are respectively positioned at the left side and the right side of the rotating platform 1, and during detection, the single HPGe detector system 22 and the transmission source and collimator assembly 31 are positioned at the two sides of the nuclear waste packaging body 100, so that the single HPGe detector system 22 can accurately receive gamma rays emitted by the transmission source. The first lift platform 2, the second lift platform 3, and the third lift platform 4 may all be lifted to facilitate adjusting the heights of the single HPGe detector system 22, the transmission source and collimator assembly 31, and the matrix detector system 41 to enable inspection of the nuclear waste package 100 at multiple heights. Furthermore, mounting the single HPGe probe system 22 on a horizontally movable translation stage 21 allows for varying the horizontal position of the single HPGe probe system 22 to effect inspection of the nuclear waste package 100 at multiple horizontal inspection positions.
The single HPGe detector system 22 and the matrix detector system 41 are integrated, the single HPGe detector system 22 and the matrix detector system 41 can work synchronously, the working efficiency is obviously improved compared with the existing single HPGe detector, the cost is low compared with the existing array HPGe detector, the scanning efficiency of TGS can be obviously improved while the economy and the universality are both considered, the measuring time is shortened, and the chromatography gamma scanning speed is improved.
The lifting of the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 can be performed by various conventional power mechanisms such as an air cylinder and a hydraulic cylinder as power, and the lifting can be performed as a preferable embodiment: as shown in fig. 2, the device further comprises a first supporting frame 23, wherein a vertical first transmission screw 24 is arranged on the first supporting frame 23, and the first transmission screw 24 is connected with a first motor 25 for driving the first transmission screw 24 to rotate; the first lifting platform 2 is in sliding fit with the first supporting frame 23 in the vertical direction, and the first transmission screw 24 is in threaded fit with the first lifting platform 2. The first support frame 23 may be a support frame body of various forms such as a door-shaped frame, an H-shaped frame, a field-shaped frame, etc., as long as stable support can be ensured. The two ends of the first transmission screw 24 can be mounted on the first support frame 23 through bearings, the first motor 25 adopts a servo motor, and can be connected with the first transmission screw 24 through various common connection modes such as a coupler, a speed reducer, a belt, a gear and the like for driving the first transmission screw 24 to rotate. The first lifting platform 2 and the first supporting frame 23 are in sliding fit in the vertical direction, the first lifting platform 2 is positioned through the matching, the first lifting platform 2 is guaranteed to move up and down only, when the first motor 25 drives the first transmission screw rod 24 to rotate, the first lifting platform 2 can move up and down under the action of threads, and the height of the first lifting platform 2 is adjusted. The servo motor is adopted as lifting power, the lifting height of the first lifting platform 2 can be conveniently and accurately controlled by using the existing control equipment, and the detection accuracy is ensured. In addition, the first motor 25 is matched with the speed reducer, so that the first lifting platform 2 can be ensured to move slowly and stably.
The first lifting platform 2 and the first supporting frame 23 are in various matching modes, for example, a vertical guide column is arranged on the first supporting frame 23, a sliding sleeve is sleeved outside the guide column, the sliding sleeve is fixedly connected with the first lifting platform 2, or a dovetail groove is arranged on the first supporting frame 23, a dovetail-shaped sliding block is arranged on the first lifting platform 2, and the sliding block is positioned in a sliding groove and is in sliding fit with the sliding groove. Preferably, as shown in fig. 3, the first support frame 23 is provided with a vertical first guide post 26, two sides of the first guide post 26 are recessed inwards to form a chute, two ends of the first lifting platform 2 are provided with first sliding sleeves 27, the inner walls of the first sliding sleeves 27 are provided with protruding blocks, and the protruding blocks of the first sliding sleeves 27 are located in the chute of the first guide post 26 and are in sliding fit with the chute.
Likewise, the second lifting platform 3 and the third lifting platform 4 may also have similar structures, and specifically, the second lifting platform further includes a second support frame 32, a vertical third transmission screw 33 is disposed on the second support frame 32, and the third transmission screw 33 is connected with a third motor that drives the third transmission screw 33 to rotate; the second lifting platform 3 is in sliding fit with the second supporting frame 32 in the vertical direction, and the third transmission screw 33 is in threaded fit with the second lifting platform 3. The lifting device further comprises a third supporting frame 44, a vertical fourth transmission screw rod 45 is arranged on the third supporting frame 44, the fourth transmission screw rod 45 is connected with a fourth motor for driving the fourth transmission screw rod 45 to rotate, the third lifting platform 4 is in sliding fit with the third supporting frame 44 in the vertical direction, and the fourth transmission screw rod 45 is in threaded fit with the third lifting platform 4. The second support frame 32 and the third support frame 44 adopt various frame structures capable of being stably supported. The two ends of the third transmission screw 33 are mounted on the second support frame 32 through bearings, and are connected with a third motor through transmission mechanisms such as a coupler, the two ends of the fourth transmission screw 45 are mounted on the third support frame 44 through bearings, and are connected with a fourth motor through transmission mechanisms such as a coupler, and the third motor and the fourth motor are also servo motors and are respectively used for driving the second lifting platform 3 and the third lifting platform 4 to lift.
In addition, the third transmission screw 33, the fourth transmission screw 45, and the first transmission screw 24 may be ball screws.
The translation driving mechanism may be a hydraulic cylinder, an air cylinder or other existing driving devices, preferably, as shown in fig. 4, the translation driving mechanism includes a second transmission screw rod 28 disposed above the first lifting platform 2, the second transmission screw rod 28 is horizontally disposed, the second transmission screw rod 28 is connected with a second motor 29, the translation platform 21 is slidably matched with the first lifting platform 2, and the translation platform 21 is in threaded connection with the second transmission screw rod 28. The second motor 29 is connected to the second transmission screw 28 through a coupling or the like, and is used for driving the second transmission screw 28 to rotate, so as to drive the translation platform 21 to move horizontally.
The sliding fit of the translation platform 21 and the first lifting platform 2, the sliding fit of the third lifting platform 4 and the third supporting frame 44 in the vertical direction, and the sliding fit of the second lifting platform 3 and the second supporting frame 32 in the vertical direction can be similar to the sliding fit of the first lifting platform 2 and the first supporting frame 23 shown in fig. 3, or various existing sliding fit methods can be adopted.
As shown in fig. 6, the upper surface of the second elevating platform 3 is provided with a horizontal first guide rail 35, and the bottom of the transmission source and collimator assembly 31 is slidably matched with the first guide rail 35, so that the transmission source and collimator assembly 31 can slide along the first guide rail 35, thereby adjusting the horizontal position of the transmission source and collimator assembly 31. The position adjustment of the transmission source and the collimator assembly 31 can be performed by adopting a ball screw mechanism driven by an air cylinder, a hydraulic cylinder or a motor as power, or can be performed manually by a person, and the positions of the transmission source and the collimator assembly 31 are fixed by fastening screws and the like.
As shown in fig. 5, the third lifting platform 4 includes multiple layers of horizontal mounting plates 42, the upper surface of each layer of mounting plates 42 is provided with a second guide rail 43, the matrix detector system 41 includes a plurality of scintillator detectors, as shown in fig. 8, each scintillator detector includes a detector body 411 and a collimator, the detector body 411 is an existing device, and the detector body 411 is located inside the collimator. The bottom of each scintillator detector is in sliding engagement with the second rail 43 to facilitate adjustment of the distance between two adjacent scintillator detectors. The mounting plate 42 is typically two-layered, with a plurality of scintillator detectors disposed on each layer of mounting plate 42. Each scintillator detector is slidable along the second guide rail 43, thereby adjusting the distance between two adjacent scintillator detectors. The movement of the scintillator detector can be manually adjusted by a human, and also can be automatically adjusted by power equipment such as a motor or a cylinder.
The horizontal position of the scintillator detector and transmission source and collimator assembly 31 is adjustable to accommodate size and positional variations of the nuclear waste package 100. In order to accurately control the position of the scintillator detector and the transmission source and collimator assembly 31, a position sensor may be provided to detect the position of the scintillator detector and the transmission source and collimator assembly 31, in conjunction with a control system, to accurately adjust the position of the scintillator detector and the transmission source and collimator assembly 31.
The transmission source and collimator assembly 31 includes a projection source, which is an existing device, and a collimator for simulating certain experimental opening conditions to detect the radiation source through the intermediate cylindrical object under the condition of detecting the end faces of different sizes, thereby researching the characteristics of the radiation source. The collimator is made of lead, the inner diameter of the collimating hole is 75mm, the outer diameter is 175mm, and the depth is 75mm; the wall of the collimating hole is made of brass and has the thickness of 2mm, so that the mechanical strength of the collimating hole is increased, and meanwhile, the characteristic X-rays of the collimator material excited by the radioactive source are shielded, and the interference of the rays is reduced. The collimator completely wraps the detector sensitive body.
The scintillator detector is also provided with a collimator made of lead, the inner diameter of the collimating hole is 5.2mm, the depth is 120mm, and the thickness is 120mm; the wall of the collimating aperture is provided with a brass layer, the thickness of the brass layer is 2mm, the brass layer is used for increasing the mechanical strength of the collimating aperture, shielding the characteristic X rays of the collimator material excited by the radioactive source and reducing the interference of the rays.
In addition, the end of the scintillator detector is also provided with a protection frame 6, and the protection frame is surrounded by 4 lead plates to form a rectangular cavity.
The rotating platform 1, the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 can be respectively a component, and are respectively fixed on the detection platform during use, but the positions of the rotating platform 1, the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 need to be adjusted to meet detection conditions, so that the use is inconvenient. Therefore, as a preferred technical solution, the present invention further includes a base 5, where the base 5 may be a plate with a larger thickness, and the rotating platform 1, the first lifting platform 2, the second lifting platform 3, and the third lifting platform 4 are all installed on the base 5, specifically, the bottom of the rotating platform 1, the first support 23 of the first lifting platform 2, the second support 32 of the second lifting platform 3, and the third support 44 of the third lifting platform 4 may be fixed on the base 5 by means of bolting or welding, so that each device is integrated into a whole, and the use is more convenient.
In the case of inspecting the nuclear waste package 100, it is necessary to perform inspection at a plurality of angles, a plurality of heights, and a plurality of horizontal positions, respectively, specifically, according to the following steps:
1. the nuclear waste package 100 is integrally assembled, the layering number of the sample to be detected is determined, each layer corresponds to one detection height, if the lowest layer is a first layer, the upper layer is a second layer, and so on;
2. the heights of the first lift table 2, the second lift table 3, and the third lift table 4 are adjusted such that the single HPGe detector system 22, the transmission source and collimator assembly 31, and the matrix detector system 41 are oriented toward the first detection height position of the sample to be measured, and the horizontal position of the translation table 21 is adjusted such that the single HPGe detector system 22 is in the first horizontal detection position and the transmission source in the transmission source and collimator assembly 31 is aligned with the center of the single HPGe detector in the single HPGe detector system 22.
3. The single HPGe detector system 22, the transmission source and collimator assembly 31, and the matrix detector system 41 are activated, and the single HPGe detector system 22 and the matrix detector system 41 simultaneously begin measuring gamma spectra, completing transmission measurements and emission measurements of the first horizontal detection position at the first detection angle, the emission measurements being measurements of radiation emitted by the nuclear waste package 100, the transmission measurements being measurements of radiation emitted by the transmission source.
4. The single HPGe detector system 22 is moved to each horizontal detection position and the detection is performed again until transmission measurements and emission measurements at all horizontal detection positions at the first detection angle are completed.
5. The rotating platform 1 rotates by a set angle and enters the next detection angle position.
6. Measuring transmission measurements and emission measurements at all horizontal detection positions at the next detection angle position according to the methods described in steps C, D and E; until the nuclear waste package 100 is rotated one revolution, transmission measurement and emission measurement at all the detection angle positions are completed, at which time scanning of the first layer sample is completed.
7. The first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 are synchronously lifted, and the scanning of the second-layer sample is entered, so that the single HPGe detector system 22, the transmission source and collimator assembly 31 and the matrix detector system 41 face the next height position of the sample to be detected, and the scanning of the second-layer sample is completed according to the method described in the steps C to F.
8. Step G is repeated until gamma spectroscopy measurements at all height positions of the nuclear waste package 100 are completed.
Therefore, the present apparatus can detect the nuclear waste package 100 at a plurality of angles, a plurality of heights, and a plurality of horizontal positions, and can satisfy the detection requirements. In addition, the device has a relatively simple structure, the manufacturing cost is lower than that of the existing array HPGe detector, the function is better than that of the existing single HPGe detector, the economical efficiency and universality are both considered, the scanning efficiency of TGS can be obviously improved, the measuring time is shortened, and the chromatography gamma scanning speed is improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Nuclear waste packaging body bimodulus synchronous scanning detection device, its characterized in that: the device comprises a rotating platform (1), wherein the rotating platform (1) is connected with a rotating driving mechanism; a first lifting platform (2), a second lifting platform (3) and a third lifting platform (4) are arranged around the rotating platform (1), a translation platform (21) is arranged on the first lifting platform (2), the translation platform (21) is connected with a translation driving mechanism, and a single HPGe detector system (22) is arranged on the translation platform (21); a transmission source and collimator assembly (31) is arranged on the second lifting platform (3); a matrix detector system (41) is arranged on the third lifting platform (4); the matrix detector system (41), the transmission source and collimator assembly (31) and the single HPGe detector system (22) are all oriented towards the rotary platform (1), and the matrix detector system (41), the transmission source and collimator assembly (31) and the single HPGe detector system (22) are respectively located on three sides of the rotary platform (1), and the transmission source in the transmission source and collimator assembly (31) is aligned with the center of the single HPGe detector in the single HPGe detector system (22).
2. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the device further comprises a first supporting frame (23), wherein a vertical first transmission screw rod (24) is arranged on the first supporting frame (23), and the first transmission screw rod (24) is connected with a first motor (25) for driving the first transmission screw rod (24) to rotate; the first lifting platform (2) is in sliding fit with the first supporting frame (23) in the vertical direction, and the first transmission screw rod (24) is in threaded fit with the first lifting platform (2).
3. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 2, wherein: be provided with vertical first guide post (26) on first support frame (23), the both sides of first guide post (26) are inwards sunken to form the spout, the both ends of first lift platform (2) are provided with first sliding sleeve (27), the inner wall of first sliding sleeve (27) is provided with the lug, the lug of first sliding sleeve (27) is located the spout of first guide post (26) and with spout sliding fit.
4. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the upper part of the first lifting platform (2) is provided with a horizontal second transmission screw rod (28), the second transmission screw rod (28) is connected with a second motor (29), the translation platform (21) is in sliding fit with the first lifting platform (2), and the translation platform (21) is in threaded connection with the second transmission screw rod (28).
5. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the device further comprises a second support frame (32), wherein a vertical third transmission screw rod (33) is arranged on the second support frame (32), and the third transmission screw rod (33) is connected with a third motor for driving the third transmission screw rod (33) to rotate; the second lifting platform (3) is in sliding fit with the second supporting frame (32) in the vertical direction, and the third transmission screw rod (33) is in threaded fit with the second lifting platform (3).
6. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the lifting device comprises a first lifting platform (4) and a second lifting platform (4), and is characterized by further comprising a second supporting frame (44), wherein a second vertical transmission screw rod (45) is arranged on the second supporting frame (44), the second transmission screw rod (45) is connected with a second motor for driving the second transmission screw rod (45) to rotate, the second lifting platform (4) is in sliding fit with the second supporting frame (44) in the vertical direction, and the second transmission screw rod (45) is in threaded fit with the second lifting platform (4).
7. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the upper surface of the second lifting platform (3) is provided with a horizontal first guide rail (35), and the bottom of the transmission source and collimator assembly (31) is in sliding fit with the first guide rail (35).
8. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: the third lifting platform (4) comprises a plurality of layers of horizontal mounting plates (42), a second guide rail (43) is arranged on the upper surface of each layer of mounting plates (42), the matrix detector system (41) comprises a plurality of scintillator detectors, and the bottom of each scintillator detector is in sliding fit with the second guide rail (43) so as to adjust the distance between two adjacent scintillator detectors.
9. The nuclear waste packaging dual-mode synchronous scanning detection device of claim 1, wherein: still include base (5), rotation platform (1), first lift platform (2), second lift platform (3) and third lift platform (4) are all installed on base (5).
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| CN111708071B (en) * | 2020-06-05 | 2022-08-05 | 成都理工大学 | Nuclear waste packaging body assembly line type scanning detection device |
| CN111924449B (en) * | 2020-06-05 | 2022-03-29 | 成都理工大学 | Nuclear waste packaging body scanning detection device |
| CN111722260B (en) * | 2020-06-24 | 2022-12-09 | 上海交通大学 | Transmission source storage and adjustment device |
| CN112034504A (en) * | 2020-07-30 | 2020-12-04 | 武汉雅洛诗商贸有限公司 | Atmospheric radioactive scene radiation level detection station |
| CN112147669B (en) * | 2020-09-27 | 2022-08-26 | 四川省工程装备设计研究院有限责任公司 | Neutron array detection mechanical platform and electromechanical control system |
| CN112799121B (en) * | 2020-12-07 | 2023-07-04 | 四川轻化工大学 | Movable track type experiment platform for gamma radiation detector |
| CN114236596B (en) * | 2021-12-30 | 2023-06-30 | 温州理工学院 | Nuclear waste packaging body self-adaptive scanning method based on dual-mode detector system |
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| US5378895A (en) * | 1993-11-12 | 1995-01-03 | Eg&G Idaho, Inc. | Gamma neutron assay method and apparatus |
| TWI388875B (en) * | 2009-08-21 | 2013-03-11 | Iner Aec Executive Yuan | Radioactivity measuring apparatus with rotating stage for waste drums |
| CN102253401A (en) * | 2011-04-28 | 2011-11-23 | 上海交通大学 | Mechanical device used for scanning measurement of chromatographic Gamma |
| CN103901052B (en) * | 2014-03-19 | 2016-01-27 | 中国原子能科学研究院 | A kind of SGS and TGS combined measurement device and collimating apparatus optimization method |
| CN106843292B (en) * | 2017-03-23 | 2019-12-27 | 四川理工学院 | Motion control method and system of radioactive solid waste barrel detection device |
| CN109387864A (en) * | 2017-08-09 | 2019-02-26 | 中国辐射防护研究院 | A kind of radioactive waste bucket activity measurement device |
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