CN110456407B - Integrated measurement system and method for medium-low level waste storage and transportation container - Google Patents
Integrated measurement system and method for medium-low level waste storage and transportation container Download PDFInfo
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- CN110456407B CN110456407B CN201910789806.6A CN201910789806A CN110456407B CN 110456407 B CN110456407 B CN 110456407B CN 201910789806 A CN201910789806 A CN 201910789806A CN 110456407 B CN110456407 B CN 110456407B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/1603—Measuring radiation intensity with a combination of at least two different types of detector
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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- G—PHYSICS
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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Abstract
The invention discloses a middle-low level waste storage and transportation container integrated measurement system and a method thereof, wherein the system comprises a control device, a bearing platform, an alpha measurement device, a gamma measurement device and a waste barrel conveying mechanism, wherein the alpha measurement device, the gamma measurement device and the waste barrel conveying mechanism are arranged on the bearing platform; the bearing platform is provided with an alpha measurement position and a gamma measurement position; the alpha measuring device is used for carrying out alpha measurement on the waste barrel positioned at the alpha measuring position according to the control command of the control device to obtain an alpha measuring result; the control device is used for controlling the waste barrel conveying mechanism to convey the waste barrel from the alpha measurement position to the gamma measurement position or take the waste barrel away from the integrated measurement system according to the alpha measurement result so as to classify and dispose the waste barrel; the gamma measuring device is used for carrying out gamma measurement on the waste barrel positioned at the gamma measuring position according to the control command of the control device. The invention can realize the integrated measurement of alpha and gamma detection of the waste bin and improve the reliability of the measurement and classification results of the waste bin.
Description
Technical Field
The invention relates to the technical field of waste barrel measurement, in particular to a system and a method for integrally measuring a medium-low-level waste storage and transportation container.
Background
All products disclosed at present are designed and researched aiming at a certain ray of nuclear waste, such as an alpha detection system or a gamma detection system, and no equipment combining two detection methods into a whole exists temporarily, so that the conventional equipment cannot perform integrated measurement of a waste barrel, is time-consuming and labor-consuming, and does not have the integrated measurement function of alpha neutron and gamma detection.
The measurement cavity of the conventional barreled alpha waste neutron detection equipment is a regular hexagonal prism/regular quadrangular prism, the distribution shape of the detector inside the measurement cavity is the same as the appearance of the measurement cavity, and the neutron detection has certain angle dependence, so that the appearance design and the detector distribution mode cannot detect all neutrons, the detector can miss detecting part of neutrons, the neutron detection efficiency of the detector is reduced, and the detection accuracy is influenced.
Disclosure of Invention
The invention aims to provide a medium-low level waste storage and transportation container integrated measurement system and a method thereof, which realize the integrated measurement of alpha and gamma detection of a waste barrel and improve the reliability of the measurement and classification results of the waste barrel.
In order to achieve the purpose of the invention, the embodiment of the invention provides an integrated measuring system for a medium-low level waste storage and transportation container, which comprises a control device, a bearing platform, an alpha measuring device, a gamma measuring device and a waste barrel conveying mechanism, wherein the alpha measuring device, the gamma measuring device and the waste barrel conveying mechanism are arranged on the bearing platform; the bearing platform is provided with an alpha measurement position and a gamma measurement position; the alpha measuring device is used for carrying out alpha measurement on the waste barrel positioned at the alpha measuring position according to the control instruction of the control device to obtain an alpha measuring result; the control device is used for controlling the waste barrel conveying mechanism to convey the waste barrel from an alpha measuring position to a gamma measuring position or carry the waste barrel away from the integrated measuring system according to the alpha measuring result; the gamma measuring device is used for carrying out gamma measurement on the waste barrel positioned at the gamma measuring position according to the control command of the control device to obtain a gamma measuring result.
Preferably, a first lifting mechanism is arranged on the bearing platform; the alpha measuring device is provided with an alpha measuring shell, the alpha measuring shell is provided with a measuring cavity, alpha measuring elements are arranged in the measuring cavity, and the first lifting mechanism is used for driving the alpha measuring device to lift at the alpha measuring position according to the control command of the control device so as to enable the alpha measuring shell to be away from the waste barrel or cover the waste barrel in the measuring cavity; the alpha measuring element is used for carrying out alpha measurement on a waste barrel covered in the measuring cavity.
Preferably, a second lifting mechanism is arranged in the measurement cavity, the α measurement element is arranged on the second lifting mechanism, and the second lifting mechanism is used for driving the α measurement element to lift according to a control command of the control device so as to perform α measurement on different layers.
Preferably, the α measurement element includes a plurality of neutron detectors, the plurality of neutron detectors are located at the same horizontal plane, and the plurality of neutron detectors are uniformly arranged inside the α measurement housing.
Preferably, a first sensor is arranged at the alpha measuring position and used for detecting whether the waste barrel enters the alpha measuring position or not; the control device is used for receiving the detection information of the first sensor and generating a corresponding control instruction so as to control the alpha measuring device to measure the waste barrel.
Preferably, the first sensor is a photosensor.
Preferably, the gamma measuring device comprises a plurality of gamma detectors, and each gamma detector is correspondingly provided with a collimator and a radioactive source; the radioactive source is used for providing gamma rays, the collimator is used for collimating the gamma rays, and the gamma detector is used for measuring various energy gamma rays emitted by the radioactive source and the waste bin.
Preferably, the gamma measurement device comprises two to four gamma detectors forming a detector array.
Preferably, a third lifting mechanism and a fourth lifting mechanism are arranged on the bearing platform, the gamma detector and the collimator are arranged on the third lifting mechanism, the radioactive source is arranged on the fourth lifting mechanism, the third lifting mechanism is used for driving the gamma detector and the collimator to lift according to a control instruction of the control device, and the fourth lifting mechanism is used for driving the radioactive source to lift according to the control instruction of the control device; the gamma detector, the collimator and the radioactive source are lifted synchronously to measure the gamma rays of different layers.
Preferably, a second sensor is provided at the gamma measuring position for detecting whether the trash can enters the gamma measuring position; the control device is used for receiving the detection information of the second sensor and generating a corresponding control instruction so as to control the gamma measuring device to measure the waste barrel.
Preferably, the second sensor is a photosensor.
Preferably, the waste bin transfer mechanism includes a support platform for moving the support platform from an α measurement position to a γ measurement position according to a control instruction of the control device, and a moving mechanism for placing a waste bin.
Preferably, the bearing platform is also provided with a position to be detected of the waste bucket; the supporting platform is provided with a third sensor, and the third sensor is used for detecting whether a waste barrel to be detected is placed on the supporting platform; the control device is used for receiving the detection information of the third sensor and generating a corresponding control instruction; the moving mechanism is used for conveying the waste barrel on the supporting platform from the position to be detected of the waste barrel to the alpha measuring position according to the control instruction of the control device.
Preferably, the third sensor is a gravity sensor.
Preferably, a rotating mechanism is arranged on the supporting platform and is used for driving the waste barrel to rotate according to a control command of the control device when the waste barrel alpha is measured.
In order to achieve the purpose of the invention, the embodiment of the invention provides an integrated measurement method for a medium-low level waste storage and transportation container, which is realized based on an integrated measurement system for the medium-low level waste storage and transportation container; the method comprises the following steps:
when the waste bin is located at the alpha measuring position, the control device generates a first control instruction;
the alpha measuring device carries out alpha measurement on the waste barrel positioned at the alpha measuring position according to the first control instruction to obtain an alpha measuring result;
the control device receives and generates a corresponding control instruction according to the alpha measurement result; if the waste bucket is alpha waste, the control device generates a second control instruction, and the waste bucket conveying mechanism carries the waste bucket away from the integrated measuring system according to the second control instruction; if the waste bin is not alpha waste, the control device generates a third control command, and the waste bin conveying mechanism conveys the waste bin to the gamma measuring position according to the third control command;
when the waste bin is located at the gamma measuring position, the control device generates a fourth control instruction;
and the gamma measuring device performs gamma measurement on the waste barrel positioned at the alpha measuring position according to the fourth control instruction to obtain a gamma measuring result.
The embodiment of the invention at least has the following beneficial effects:
the automatic continuous radioactivity measurement standardization process of the medium and low-level waste barrels is realized by integrating a nuclear waste alpha detection system and a nuclear waste gamma detection system of the medium and low-level waste barrels into an integrated measurement system; the waste barrel firstly carries out alpha neutron detection, and if alpha nuclear waste is confirmed, the waste barrel is taken away from a bearing platform of the integrated measurement system to directly carry out waste classification disposal; if the waste is non-alpha waste, carrying out gamma detection; the alpha and gamma detection functions of the medium and low-level waste barrels are innovatively combined together, and integrated measurement of the medium and low-level waste barrels is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an integrated measuring system of a medium-low level waste storage and transportation container according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an integrated measuring system of a medium-low level waste storage and transportation container according to the second embodiment of the invention.
Fig. 3 is a schematic structural diagram of the γ measurement apparatus according to the second embodiment of the present invention.
Fig. 4 is a flow chart of an integrated measurement method for a medium-low level waste storage and transportation container according to a third embodiment of the present invention.
Reference numerals:
a control device 1; the device comprises an alpha measuring device 2, a neutron detector 21, a first lifting mechanism 22 and a second lifting mechanism 23; the device comprises a gamma measuring device 3, a gamma detector 31, a collimator 32, a radioactive source 33, a third lifting mechanism 34 and a fourth lifting mechanism 35; a waste bucket conveying mechanism 4, a moving mechanism 41, a rotating mechanism 42; a first sensor 5, a second sensor 6, a third sensor 7.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
As shown in fig. 1, an embodiment of the present invention provides an integrated measuring system for a medium-low level waste storage and transportation container, which includes a control device 1, a carrying platform, and an α measuring device 2, a γ measuring device 3 and a waste bin conveying mechanism 4 which are arranged on the carrying platform; the bearing platform is provided with an alpha measurement position and a gamma measurement position; the alpha measuring device 2 is used for carrying out alpha measurement on the waste barrel positioned at the alpha measuring position according to the control command of the control device 1 to obtain an alpha measuring result; the control device 1 is used for controlling the waste barrel conveying mechanism 4 to convey a waste barrel from an alpha measuring position to a gamma measuring position or carry the waste barrel away from the integrated measuring system according to the alpha measuring result; the gamma measuring device 3 is used for carrying out gamma measurement on the waste barrel positioned at the gamma measuring position according to the control command of the control device 1 to obtain a gamma measuring result.
Specifically, in the method of the first embodiment, a nuclear waste alpha detection system and a nuclear waste gamma detection system of a medium-low level waste bin are integrated into an integrated measurement system, so that a radioactive automatic continuous measurement standardization process of the medium-low level waste bin is realized; in this embodiment, the waste bin is subjected to α detection, when the waste bin is accurately placed at an α measurement position on the carrying platform, the control device 1 controls the α measurement device 2 to execute a corresponding instruction to perform α measurement on the waste bin located at the α measurement position to obtain an α measurement result, and if the α measurement result is that the waste bin is determined to be α nuclear waste, the control device 1 controls the waste bin conveying mechanism 4 to execute a corresponding instruction to carry the waste bin away from the α measurement position from the carrying platform of the integrated measurement system to directly perform waste classification disposal; if it is non-alpha waste, the control device 1 controls the waste bin transfer mechanism 4 to execute corresponding instructions to transfer the waste bin from the alpha measurement position to the gamma measurement position; when the waste barrel is accurately placed at the gamma measuring position on the bearing platform, the control device 1 controls the gamma measuring device 3 to execute corresponding instructions to perform gamma measurement on the waste barrel positioned at the gamma measuring position to obtain a gamma measuring result, and after the gamma measurement is finished, the control device 1 controls the waste barrel conveying mechanism 4 to execute corresponding instructions to take the waste barrel away from the bearing platform of the integrated measuring system from the gamma measuring position for waste classification disposal; the method of the embodiment innovatively combines the alpha and gamma detection functions of the medium and low-level waste barrels together to realize the integrated measurement of the medium and low-level waste barrels.
As shown in fig. 2, the second embodiment of the invention provides another integrated measuring system for a low-level waste storage and transportation container, and the system in the second embodiment is a preferable scheme of the system in the first embodiment.
In the second embodiment, a first lifting mechanism 22 is arranged on the bearing platform; the alpha measuring device 2 is provided with an alpha measuring shell, the alpha measuring shell is provided with a measuring cavity, alpha measuring elements are arranged in the measuring cavity, and the first lifting mechanism 22 is used for driving the alpha measuring device 2 to lift at the alpha measuring position according to the control command of the control device 1 so as to enable the alpha measuring shell to be far away from the waste bucket or enable the waste bucket to cover the waste bucket in the measuring cavity; the alpha measuring element is used for carrying out alpha measurement on a waste barrel covered in the measuring cavity.
Wherein, a second lifting mechanism 23 is arranged in the measurement cavity, the α measurement element is arranged on the second lifting mechanism 23, and the second lifting mechanism 23 is used for driving the α measurement element to lift according to the control instruction of the control device 1 to perform α measurement on different layers.
Wherein the alpha measuring element comprises a plurality of neutron detectors 21, the plurality of neutron detectors 21 are located on the same horizontal plane, and the plurality of neutron detectors 21 are uniformly arranged on the inner side of the alpha measuring shell.
Wherein a first sensor 5 is arranged at the alpha measuring position, the first sensor 5 is preferably but not limited to a photoelectric sensor, such as a cross laser sensor; the first sensor 5 is used to detect whether the waste bin enters the alpha measuring position; the control device 1 is used for receiving the detection information of the first sensor 5 and generating a corresponding control instruction to control the alpha measuring device 2 to measure the waste barrel.
Specifically, the measuring cavity is preferably but not limited to be in a circular design and is made of materials such as high-density polyethylene and graphite, the outermost layer of the measuring cavity is made of the high-density polyethylene, neutrons in the environment are slowed down, and the influence of the background of the neutrons in the environment on the measuring result is reduced; the neutron detector 21 is embedded in the high-density polyethylene at the inner layer and used for slowing down neutrons emitted by the waste barrel in the measuring cavity to enable the neutrons to reach a thermal neutron energy level, so that the neutron detector 21 can better capture the neutrons, and the accuracy of a detection result is guaranteed; the neutron reflecting layer made of graphite is embedded between the outer-layer high-density polyethylene and the inner-layer high-density polyethylene, so that neutrons affecting the measurement result in the environment can be blocked, neutrons scattered by a possibly leaked waste barrel can be prevented, the neutron detection efficiency is improved, and the accuracy of the detection result is ensured; the detectors are circularly distributed in the high-density polyethylene at the inner layer of the measuring cavity, so that the neutron detection efficiency of the detectors is improved to ensure the accuracy of the detection effect no matter which direction the neutrons enter the detector crystal; empty slots for the detector to move are distributed in the inner-layer high-density polyethylene, and the detection layer can be randomly selected through the second lifting mechanism 23, so that the requirements of different layers for neutron detection are met.
As shown in fig. 3, the γ measurement apparatus 3 includes a plurality of γ detectors 31, each γ detector 31 is correspondingly provided with a collimator 32 and a radiation source 33; the radiation source 33 is used for providing gamma rays, the collimator 32 is used for collimating the gamma rays, and the gamma detector 31 is used for measuring the gamma rays with various energies emitted by the radiation source 33 and the waste bin.
Wherein the gamma measuring device 3 comprises two to four gamma detectors 31, the two to four gamma detectors 31 forming a detector array. In the present embodiment, three gamma detectors 31 are preferred, and correspondingly, three collimators 32 and three radiation sources 33 are provided.
A third lifting mechanism 34 and a fourth lifting mechanism 35 are arranged on the carrying platform, the gamma detector 31 and the collimator 32 are arranged on the third lifting mechanism 34, the radioactive source 33 is arranged on the fourth lifting mechanism 35, the third lifting mechanism 34 is used for driving the gamma detector 31 and the collimator 32 to lift according to a control instruction of the control device 1, and the fourth lifting mechanism 35 is used for driving the radioactive source 33 to lift according to a control instruction of the control device 1; wherein, the gamma detector 31, the collimator 32 and the radioactive source 33 are lifted synchronously to measure the gamma rays of different layers.
Wherein a second sensor 6 is arranged at the gamma measurement position, the second sensor 6 is preferably but not limited to a photoelectric sensor, such as a cross laser sensor; the second sensor 6 is used for detecting whether the waste barrel enters a gamma measuring position; the control device 1 is used for receiving the detection information of the second sensor 6 and generating a corresponding control instruction so as to control the gamma measuring device 3 to measure the waste barrel.
Specifically, the γ measuring apparatus 3 in this embodiment includes 3 detectors forming a detector array and a collimator 32 disposed in front of the detectors for collimating γ rays; the detector and the collimator 32 form a detection component array which is arranged on the third lifting mechanism 34 of the detector, and the vertical lifting of the detection component array can be realized, so that the detection layer surface can be freely selected according to the measurement requirement.
In the embodiment, the gamma detector 31 is an irradiation-resistant detector with high gamma sensitivity, good energy resolution, low sensitivity to neutrons and particles with points and strong anti-interference capability; the design of the collimator 32 is related to the accuracy of the measurement result, and it is necessary to ensure that the measurement time of the whole measurement system can be reduced and the quality of the measured image can be improved, so that the collimator 32 is selected from the collimators 32 having less gamma ray absorption loss, strong gamma ray shielding and scattering capabilities, high mechanical strength, and strong irradiation resistance and interference resistance. The gamma detector 31 system is used for measuring various energy gamma rays emitted by the radioactive source 33 and the waste bin, converting the energy of the gamma rays into electric signal data and outputting the electric signal data to the control device 1 for data analysis and processing of gamma measurement of the waste bin.
Wherein, the radiation source 33 is an important component of the gamma measuring device 3, three identical radiation sources 33 forming an array of radiation sources 33 are mounted on the fourth lifting mechanism 35, and a radiation source 33 collimator 32 for gamma ray collimation is mounted at the radiation exit end of each radiation source 33 for providing collimated gamma rays in the projection measurement of the waste bin.
Wherein the waste bin transfer mechanism 4 comprises a support platform and a moving mechanism 41, the moving mechanism 41 is used for moving the support platform from an alpha measurement position to a gamma measurement position according to the control command of the control device 1, and the support platform is used for placing the waste bin.
Wherein, the bearing platform is also provided with a position to be detected of the waste barrel; a third sensor 7 is arranged on the supporting platform, and the third sensor 7 is preferably, but not limited to, a gravity sensor; the third sensor 7 is used for detecting whether a waste bucket to be detected is placed on the supporting platform; the control device 1 is used for receiving the detection information of the third sensor 7 and generating a corresponding control instruction; the moving mechanism 41 is used for conveying the waste barrel on the supporting platform from the position to be detected of the waste barrel to the alpha measuring position according to the control instruction of the control device 1.
Wherein, a rotating mechanism 42 is arranged on the supporting platform, and the rotating mechanism 42 is used for driving the waste barrel to rotate according to the control instruction of the control device 1 when the waste barrel alpha is measured. The rotating mechanism 42 is preferably, but not limited to, a rotating motor, and the rotating motor is electrically connected to the control device 1, and receives and rotates according to an instruction of the control device 1 to drive the support table to rotate.
The integrated measurement system provides an intelligent control mode and a manual control mode, and the intelligent control mode and the manual control mode can be switched according to requirements; in order to protect equipment, workers, ecological environment and the like, the control system has an emergency stop function, and can execute an emergency stop instruction in an emergency situation.
The moving mechanism 41 is preferably, but not limited to, implemented by a moving motor, a moving guide rail, and a support table, wherein the moving motor is electrically connected to the control device 1, receives and drives the support table to move along the moving guide rail according to a command from the control device 1, and the support table is disposed on the moving guide rail.
The first lifting mechanism 22, the second lifting mechanism 23, the third lifting mechanism 34, and the fourth lifting mechanism 35 are vertical lifting mechanisms relative to the carrying platform, and are preferably, but not limited to, implemented by a lifting motor, a lifting guide rail, and a lifting slider, the lifting motor is electrically connected to the control device 1, receives and drives the lifting slider to lift along the lifting guide rail according to an instruction of the control device 1, and the lifting slider is disposed on the lifting guide rail. Specifically, the corresponding part can be lifted by arranging the part which needs to be lifted on the lifting slide block.
Specifically, the working principle of the system in the second embodiment is specifically described as follows:
the initial position of the supporting platform is located at the position to be detected of the waste bucket, and when the waste bucket is automatically detected, the waste bucket to be detected is placed on the supporting platform; at the moment, the gravity sensor detects the supporting weight information of the supporting platform and sends the supporting weight information to the control device, the control device judges according to the supporting weight information, and when the supporting weight is larger than a preset threshold value, the waste barrel is placed on the supporting platform. And meanwhile, generating a corresponding control command according to the support weight information to control the moving mechanism to convey the support platform carrying the waste bucket to an alpha measurement position.
The control device is in communication connection with the first sensor, can receive and process detection information of the first sensor in real time, and determines whether the waste barrel is accurately placed at the alpha measuring position on the bearing platform. Further, based on the cross laser sensor (used for realizing alignment), when the control device further generates a corresponding control instruction according to the detection information of the first sensor, the moving mechanism is controlled to move so as to adjust the position of the waste bucket, so that the waste bucket is accurately placed at the alpha measurement position on the bearing platform.
When the waste barrel is accurately arranged at the alpha measuring position on the bearing platform, the control device generates a corresponding control instruction according to the detection information of the first sensor to control the first lifting mechanism to descend, so that the alpha measuring shell completely covers the waste barrel, specifically, a structure meshed with the alpha measuring shell is arranged on the supporting platform, so that the waste barrel can be covered in a closed cavity formed by the meshing of the supporting platform and the alpha measuring shell. When the supporting platform is meshed with the alpha measuring shell, the lifting mechanism stops descending, and at the moment, the control device generates a corresponding control instruction to control the rotating mechanism to rotate so as to drive the waste barrel to rotate; and generating a corresponding control command to control the alpha measuring device to carry out alpha measurement on the waste barrel to be detected. The control of the alpha measuring device comprises the control of a second lifting mechanism and an alpha measuring element, and specifically comprises the steps of generating a control instruction to control the second lifting mechanism to lift and drive the alpha measuring element to lift, generating another control instruction to control the alpha measuring element to carry out alpha measurement on different layers of the waste barrel to obtain an alpha measuring result, feeding the alpha measuring result back to the control device by the alpha measuring element to be analyzed and stored, and at the moment, generating a control instruction by the control device to control the first lifting mechanism to lift and the rotating mechanism to stop rotating so that the alpha measuring shell returns to the initial position and is far away from the waste barrel.
The control device processes and analyzes the neutron count, calculates the activity according to the obtained measurement data, identifies the nuclide type, calculates the total activity by combining the obtained weight information of the waste barrel, displays the nuclide information contained in the waste barrel, and identifies whether the waste barrel is alpha waste. The control device develops the research of the neutron flux spatial-temporal evolution rule in the waste drum based on alpha measurement data, uses a harmonic wave expansion theory to finely process the neutron flux distribution in the waste drum, establishes a three-dimensional neutron flux spatial-temporal evolution model in the waste drum, and develops man-machine interaction software and a matched database for monitoring the neutron flux in the waste drum on the basis.
And the control device generates a corresponding control instruction according to the alpha measurement result so as to execute the next process.
If the alpha measurement result is that the waste barrel is confirmed to be alpha nuclear waste, the control device generates a control instruction to control the moving mechanism to execute a corresponding instruction so as to take the supporting platform carrying the waste barrel away from the carrying platform of the integrated measurement system from the alpha measurement position to directly carry out waste classification disposal;
if the waste is non-alpha waste, the control device generates a control command to control the moving mechanism to execute a corresponding command so as to transfer the supporting platform carrying the waste barrel from the alpha measurement position to the gamma measurement position for subsequent gamma measurement.
The control device is in communication connection with the second sensor, can receive and process detection information of the second sensor in real time, and determines whether the waste barrel is accurately placed at the gamma measurement position on the bearing platform. Further, based on the cross laser sensor (used for realizing alignment), when the control device further generates a corresponding control command according to the detection information of the second sensor, the control device controls the moving mechanism to move so as to adjust the position of the waste bucket, so that the waste bucket is accurately placed at the gamma measurement position on the bearing platform.
When the waste barrel is accurately arranged at the gamma measurement position on the bearing platform, the control device generates a corresponding control instruction according to the detection information of the second sensor and is used for controlling the third lifting mechanism and the fourth lifting mechanism to synchronously lift, so that the gamma detector, the collimator and the radioactive source are driven to synchronously lift to perform gamma ray measurement on different layers to obtain gamma measurement results, and the gamma detector feeds the gamma measurement results back to the control device for analysis and storage.
The gamma measuring device has two measuring modes of SGS and TGS, and can be switched according to actual measuring requirements.
And the control device generates a corresponding control instruction according to the gamma measurement result so as to execute the next process.
The control device generates a control instruction according to the gamma measurement result to control the moving mechanism to execute a corresponding instruction so as to take the waste barrel away from the bearing platform of the integrated measurement system from the gamma measurement position for waste classification disposal. At the moment, the current measurement of the waste barrel is finished, and the control device generates a corresponding control instruction to control the moving mechanism to move so that the supporting platform returns to the position to be detected of the waste barrel and enters the lower waste barrel for the measurement and classification work of the low-level waste.
As shown in fig. 4, a third embodiment of the present invention provides an integrated measurement method for a low-and-medium level waste storage and transportation container, which is implemented based on the integrated measurement system for a low-and-medium level waste storage and transportation container according to the first embodiment or the second embodiment.
The third embodiment of the method includes the following steps:
step S11, when the waste barrel is located at the alpha measuring position, the control device generates a first control instruction;
step S12, the alpha measuring device carries out alpha measurement on the waste barrel positioned at the alpha measuring position according to the first control instruction to obtain an alpha measuring result;
step S13, the control device receives and generates a corresponding control instruction according to the alpha measurement result; if the waste bucket is alpha waste, the control device generates a second control instruction, and the waste bucket conveying mechanism carries the waste bucket away from the integrated measuring system according to the second control instruction; if the waste bin is not alpha waste, the control device generates a third control command, and the waste bin conveying mechanism conveys the waste bin to the gamma measuring position according to the third control command;
step S14, when the trash can is located at the γ measurement position, the control device generates a fourth control instruction;
and step S15, the gamma measuring device carries out gamma measurement on the waste barrel positioned at the alpha measuring position according to the fourth control instruction to obtain a gamma measuring result.
Specifically, in the method of this embodiment, the initial position of the supporting platform is located at the position to be detected of the trash can, and when the trash can is automatically detected, the trash can to be detected is placed on the supporting platform; at the moment, the gravity sensor detects the supporting weight information of the supporting platform and sends the supporting weight information to the control device, the control device judges according to the supporting weight information, and when the supporting weight is larger than a preset threshold value, the waste barrel is placed on the supporting platform. And meanwhile, generating a corresponding control command according to the support weight information to control the moving mechanism to convey the support platform carrying the waste bucket to an alpha measurement position.
The control device is in communication connection with the first sensor, can receive and process detection information of the first sensor in real time, and determines whether the waste barrel is accurately placed at the alpha measuring position on the bearing platform. Further, based on the cross laser sensor (used for realizing alignment), when the control device further generates a corresponding control instruction according to the detection information of the first sensor, the moving mechanism is controlled to move so as to adjust the position of the waste bucket, so that the waste bucket is accurately placed at the alpha measurement position on the bearing platform.
When the waste bin is accurately arranged at the alpha measuring position on the bearing platform, the control device generates a corresponding control instruction according to the detection information of the first sensor to control the first lifting mechanism to descend, so that the alpha measuring shell completely covers the waste bin, specifically, a structure meshed with the alpha measuring shell is arranged on the supporting platform, so that the waste bin can be covered in a closed cavity formed by the supporting platform and the alpha measuring shell in a meshed mode, neutron leakage is prevented, neutrons are reflected back to the cavity of the measuring cavity, and the function of improving the neutron detection efficiency is achieved. When the supporting platform is meshed with the alpha measuring shell, the lifting mechanism stops descending, and at the moment, the control device generates a corresponding control instruction to control the rotating mechanism to rotate, so that the waste barrel is driven to rotate at a constant speed, and neutron signals sent by nuclear waste in the waste barrel can be measured better; and generating a corresponding control command to control the alpha measuring device to carry out alpha measurement on the waste barrel to be detected. The control of the alpha measuring device comprises the control of a second lifting mechanism and an alpha measuring element, and specifically comprises the steps of generating a control instruction to control the second lifting mechanism to lift and drive the alpha measuring element to lift, generating another control instruction to control the alpha measuring element to carry out alpha measurement on different layers of the waste barrel to obtain an alpha measuring result, feeding the alpha measuring result back to the control device by the alpha measuring element, and generating a control instruction by the control device to control the first lifting mechanism to lift and the rotating mechanism to stop rotating so that the alpha measuring shell returns to the initial position and is far away from the waste barrel.
And the control device generates a corresponding control instruction according to the alpha measurement result so as to execute the next process.
If the alpha measurement result is that the waste barrel is confirmed to be alpha nuclear waste, the control device generates a control instruction to control the moving mechanism to execute a corresponding instruction so as to take the supporting platform carrying the waste barrel away from the carrying platform of the integrated measurement system from the alpha measurement position to directly carry out waste classification disposal;
if the waste is non-alpha waste, the control device generates a control command to control the moving mechanism to execute a corresponding command so as to transfer the supporting platform carrying the waste barrel from the alpha measurement position to the gamma measurement position for subsequent gamma measurement.
The control device is in communication connection with the second sensor, can receive and process detection information of the second sensor in real time, and determines whether the waste barrel is accurately placed at the gamma measurement position on the bearing platform. Further, based on the cross laser sensor (used for realizing alignment), when the control device further generates a corresponding control command according to the detection information of the second sensor, the control device controls the moving mechanism to move so as to adjust the position of the waste bucket, so that the waste bucket is accurately placed at the gamma measurement position on the bearing platform.
When the waste barrel is accurately arranged at the gamma measurement position on the bearing platform, the control device generates a corresponding control instruction according to the detection information of the second sensor and is used for controlling the third lifting mechanism and the fourth lifting mechanism to synchronously lift, so that the gamma detector, the collimator and the radioactive source are driven to synchronously lift to perform gamma ray measurement on different layers to obtain gamma measurement results, and the gamma detector feeds the gamma measurement results back to the control device.
And the control device generates a corresponding control instruction according to the gamma measurement result so as to execute the next process.
The control device generates a control instruction according to the gamma measurement result to control the moving mechanism to execute a corresponding instruction so as to take the waste barrel away from the bearing platform of the integrated measurement system from the gamma measurement position for waste classification disposal. At the moment, the current measurement of the waste barrel is finished, and the control device generates a corresponding control instruction to control the moving mechanism to move so that the supporting platform returns to the position to be detected of the waste barrel and enters the lower waste barrel for the measurement and classification work of the low-level waste.
It should be noted that the method described in the third embodiment corresponds to the system described in the first or second embodiment, and therefore other parts of the method described in the third embodiment can be obtained by referring to the system described in the first or second embodiment, which is not described herein again.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (14)
1. The integrated measuring system of the middle-low level waste storage and transportation container is characterized by comprising a control device, a bearing platform, an alpha measuring device, a gamma measuring device, a waste barrel conveying mechanism, a second lifting mechanism, an alpha measuring position and a gamma measuring position, wherein the alpha measuring device, the gamma measuring device, the waste barrel conveying mechanism, the second lifting mechanism, the alpha measuring position and the gamma measuring position are arranged on the bearing platform; the waste bin transfer mechanism includes a support platform and a movement mechanism;
the alpha measuring device is provided with an alpha measuring shell, the alpha measuring shell is provided with a measuring cavity, an alpha measuring element is arranged in the measuring cavity, the alpha measuring element comprises a plurality of neutron detectors, and the plurality of neutron detectors are positioned on the same horizontal plane; a second lifting mechanism is arranged in the measuring cavity, and the alpha measuring element is arranged on the second lifting mechanism; the second lifting mechanism is used for driving the alpha measuring element to lift according to the control instruction of the control device so as to perform alpha measurement on different levels of the waste barrel at the alpha measuring position to obtain an alpha measuring result;
the control device is used for controlling the waste barrel conveying mechanism to convey the waste barrel from an alpha measuring position to a gamma measuring position or carry the waste barrel away from the integrated measuring system according to the alpha measuring result;
the gamma measuring device is used for carrying out gamma measurement on the waste barrel positioned at the gamma measuring position according to the control instruction of the control device to obtain a gamma measuring result;
if the alpha measurement result is that the waste barrel is confirmed to be alpha nuclear waste, the control device generates a control instruction to control the moving mechanism to execute a corresponding instruction so as to take the supporting platform carrying the waste barrel away from the carrying platform of the integrated measurement system from the alpha measurement position to directly carry out waste classification disposal;
if the waste is non-alpha waste, the control device generates a control command to control the moving mechanism to execute a corresponding command so as to transfer the supporting platform carrying the waste barrel from the alpha measurement position to the gamma measurement position for subsequent gamma measurement.
2. The integrated measuring system for the medium and low level waste storage and transportation container as claimed in claim 1, wherein the carrying platform is provided with a first lifting mechanism; the first lifting mechanism is used for driving the alpha measuring device to lift at the alpha measuring position according to the control instruction of the control device so as to enable the alpha measuring shell to be far away from the waste bucket or enable the waste bucket to cover the measuring cavity.
3. The integrated measurement system for the middle and low level waste storage and transportation container as claimed in claim 2, wherein the alpha measurement element comprises a plurality of neutron detectors, the plurality of neutron detectors are located at the same horizontal plane, and the plurality of neutron detectors are uniformly arranged at the inner side of the alpha measurement shell.
4. The integrated measuring system for the medium and low level waste storage and transportation container as claimed in claim 1, wherein a first sensor is provided at the α measuring position, and the first sensor is used for detecting whether the waste barrel enters the α measuring position; the control device is used for receiving the detection information of the first sensor and generating a corresponding control instruction so as to control the alpha measuring device to measure the waste barrel.
5. The integrated measuring system for the medium and low level waste storage and transportation container as claimed in claim 4, wherein the first sensor is a photoelectric sensor.
6. The system as claimed in claim 1, wherein the gamma measuring device comprises a plurality of gamma detectors, each gamma detector is provided with a collimator and a radioactive source; the radioactive source is used for providing gamma rays, the collimator is used for collimating the gamma rays, and the gamma detector is used for measuring various energy gamma rays emitted by the radioactive source and the waste bin.
7. The system of claim 6, wherein the gamma measurement device comprises two to four gamma detectors, the two to four gamma detectors forming a detector array.
8. The system as claimed in claim 6, wherein a third lifting mechanism and a fourth lifting mechanism are disposed on the carrying platform, the gamma detector and the collimator are disposed on the third lifting mechanism, the radiation source is disposed on the fourth lifting mechanism, the third lifting mechanism is configured to drive the gamma detector and the collimator to lift according to the control command of the control device, and the fourth lifting mechanism is configured to drive the radiation source to lift according to the control command of the control device; the gamma detector, the collimator and the radioactive source are lifted synchronously to measure the gamma rays of different layers.
9. The integrated measuring system for the middle and low level waste storage and transportation container as claimed in claim 1, wherein a second sensor is provided at the gamma measuring position for detecting whether the waste barrel enters the gamma measuring position; the control device is used for receiving the detection information of the second sensor and generating a corresponding control instruction so as to control the gamma measuring device to measure the waste barrel.
10. The integrated measuring system for the medium and low level waste storage and transportation container as claimed in claim 9, wherein the second sensor is a photoelectric sensor.
11. The system for integrally measuring the medium and low level waste storage and transportation container as claimed in claim 1, wherein the carrying platform is further provided with a position to be detected of the waste barrel; the supporting platform is provided with a third sensor, and the third sensor is used for detecting whether a waste barrel to be detected is placed on the supporting platform; the control device is used for receiving the detection information of the third sensor and generating a corresponding control instruction; the moving mechanism is used for conveying the waste barrel on the supporting platform from the position to be detected of the waste barrel to the alpha measuring position according to the control instruction of the control device.
12. The integrated measuring system for the medium and low level waste storage and transportation container as claimed in claim 11, wherein the third sensor is a gravity sensor.
13. The integrated measuring system of the middle and low level waste storage and transportation container as claimed in claim 1, wherein a rotating mechanism is provided on the supporting platform, and the rotating mechanism is used for driving the rotation of the waste barrel according to the control command of the control device when the alpha measurement of the waste barrel is performed.
14. The integrated measurement method of the medium and low-level waste storage and transportation container is realized based on the integrated measurement system of the medium and low-level waste storage and transportation container as defined in any one of claims 1 to 13; characterized in that the method comprises the following steps:
when the waste bin is located at the alpha measuring position, the control device generates a first control instruction;
the alpha measuring device carries out alpha measurement on the waste barrel positioned at the alpha measuring position according to the first control instruction to obtain an alpha measuring result;
the control device receives and generates a corresponding control instruction according to the alpha measurement result; if the waste bucket is alpha waste, the control device generates a second control instruction, and the waste bucket conveying mechanism carries the waste bucket away from the integrated measuring system according to the second control instruction; if the waste bin is not alpha waste, the control device generates a third control command, and the waste bin conveying mechanism conveys the waste bin to the gamma measuring position according to the third control command;
when the waste bin is located at the gamma measuring position, the control device generates a fourth control instruction;
and the gamma measuring device performs gamma measurement on the waste barrel positioned at the alpha measuring position according to the fourth control instruction to obtain a gamma measuring result.
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| JP2013104743A (en) * | 2011-11-11 | 2013-05-30 | Mitsubishi Heavy Ind Ltd | Separating and volume reducing device for radioactive waste |
| CN103245681B (en) * | 2013-05-10 | 2016-05-04 | 中国原子能科学研究院 | Neutron gamma combined measurement device |
| CN107907901B (en) * | 2017-11-06 | 2020-03-17 | 中广核工程有限公司 | Method and system for measuring neutron and gamma energy spectrum and dosage of nuclear power station |
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