CN114019555A - Radioactive solid waste detects classification system - Google Patents
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- 239000002910 solid waste Substances 0.000 title claims abstract description 116
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 84
- 238000001514 detection method Methods 0.000 claims abstract description 74
- 238000003384 imaging method Methods 0.000 claims abstract description 31
- 238000011156 evaluation Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000013500 data storage Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 43
- 230000005855 radiation Effects 0.000 claims description 20
- 238000012937 correction Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 15
- 238000001228 spectrum Methods 0.000 claims description 15
- 230000005250 beta ray Effects 0.000 claims description 12
- 230000005251 gamma ray Effects 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 7
- 238000013507 mapping Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 229910052732 germanium Inorganic materials 0.000 claims description 4
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000002594 fluoroscopy Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 15
- 239000002699 waste material Substances 0.000 abstract description 11
- 238000007726 management method Methods 0.000 abstract description 4
- 238000009270 solid waste treatment Methods 0.000 abstract description 4
- 238000007781 pre-processing Methods 0.000 abstract description 3
- 239000002901 radioactive waste Substances 0.000 abstract description 2
- 239000002900 solid radioactive waste Substances 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 description 4
- 239000002925 low-level radioactive waste Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010860 exempt radioactive waste Substances 0.000 description 2
- 238000012863 analytical testing Methods 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002927 high level radioactive waste Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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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
- G01T1/36—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry
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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
- G01T1/36—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry
- G01T1/38—Particle discrimination and measurement of relative mass, e.g. by measurement of loss of energy with distance (dE/dx)
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Abstract
The invention belongs to the technical field of solid waste treatment, and discloses a radioactive solid waste detection and classification system, which comprises: the device comprises a sample preprocessing module, a perspective imaging module, a central control module, a scanning and measuring module, a measuring result correcting module, a solid waste detecting and classifying module, an evaluation module, a data storage module and an updating and displaying module. According to the method, the corresponding relation between the pollution level of the radioactive solid waste and the surface dose level limit range is established, the surface dose level of the radioactive solid waste is compared with the surface dose level limit range, the pollution level is rapidly determined, and classified collection is realized, so that the processing, disposal and management capabilities of the solid radioactive waste are greatly improved. The method is closer to the actual situation of the site, is convenient to implement on the site, has more credible evaluation results, can analyze and evaluate the composition and activity of the radionuclide in the waste bag, and meets the requirements related to the treatment of the radioactive waste.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment, and particularly relates to a radioactive solid waste detection and classification system.
Background
Currently, radioactive solid wastes are mainly present in nuclear power plants, decommissioned nuclear facilities and contaminated soils. Mainly classified into exempt waste, low level waste, medium level waste, high level waste and alpha waste according to the degree of contamination. Waste of different contamination levels requires different treatment and disposal methods, and therefore radioactive solid waste is collected and sorted. Pretreatment has become a very important part of the treatment process.
However, in the domestic decommissioning of nuclear facilities and the waste treatment and disposal activities, the pretreatment process of radioactive solid waste has no corresponding reference technical standard, although in the process, the radiation monitor uses various portable dosimeters to monitor the waste. However, because the relationship between the dose data and the activity concentration cannot be established, the pollution level type of the radioactive solid waste is difficult to rapidly identify, and field personnel are guided to scientifically classify. As a result, the packages of the same material prepared subsequently may have mixed packages with different pollution levels, and have multiple defects of potential safety hazards, uneconomical factors and the like, thereby seriously restricting the scientific management of radioactive solid wastes.
For example, nuclear power plants, once put into operation, generate large quantities of radioactive solid waste each year, 70% of which are low-level combustible waste. In theory, this contamination level waste could be collected and sent to a designated radioactive solid waste incineration station for abatement. However, the technical means for rapidly detecting and classifying the pollution degree of the radioactive solid waste is lacked, and the difficulty and the cost of the radioactive solid waste treatment and disposal are increased to a certain extent. Among the solid wastes generated by the decommissioning of the nuclear power plant, more than 85 percent of the solid wastes are exempted wastes, and about 10 percent of the solid wastes are low-level wastes. For exempt waste, you can apply for control treatment, for low level waste, you can handle with lower economic cost. However, for such huge volumes and weights of nuclear facilities, the traditional methods cannot quickly and efficiently identify the degree of contamination of the waste, leading to disordered management of the waste and time-consuming analytical testing.
For the polluted soil, because a technical means for rapidly detecting and classifying the pollution degree of the radioactive solid waste is lacked, the traditional method of uniform barreling is generally adopted, or a large-scale extremely-low-level waste collection field is constructed for treatment, so that the treatment cost is high, and the time consumption is huge. Therefore, a new radioactive solid waste detection and classification system is needed.
Through the above analysis, the problems and defects of the prior art are as follows: the existing radioactive solid waste treatment method has potential safety hazard, and the polluted soil lacks a means for quickly detecting and classifying the pollution degree of the radioactive solid waste.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a radioactive solid waste detection and classification system.
The invention is realized by the radioactive solid waste detection and classification system, which comprises:
the sample pretreatment module is connected with the central control module and is used for collecting radioactive solid waste samples, sorting the radioactive solid waste and preparing sample blocks to be detected with the same size and weight;
the perspective imaging module is connected with the central control module and is used for scanning and analyzing the sample block to be detected through the X-ray perspective imaging device to obtain three-dimensional distribution data of the matrix and material density of the sample block to be detected;
the central control module is connected with the sample pretreatment module, the perspective imaging module, the scanning measurement module, the measurement result correction module and the solid waste detection and classification module and is used for coordinating and controlling the normal operation of each module of the radioactive solid waste detection and classification system through a central processing unit;
the scanning measurement module is connected with the central control module and is used for measuring the surface dose level, the type of the pollution nuclide and the radioactivity ratio of the sample block to be measured through a high-purity germanium gamma spectrometer;
wherein the measurement of specific activity comprises:
measuring to obtain a gamma original spectrum and a beta-gamma coincidence spectrum;
resolving the spectrum to obtain beta ray efficiency scales and gamma ray efficiency scales; the calculation formula of the scale beta-ray detection efficiency is as follows:
in the formula, nγIs the original spectrum gamma ray peak count rate, nγcFor coincidence spectrum gamma ray peak count rate, PβIs the beta ray emission probability;
calculating the activity of the radioactive gas nuclide by utilizing the beta ray efficiency scale and the gamma ray efficiency scale;
the measurement result correction module is connected with the central control module and used for correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio and the energy response characteristic of the dose level radiation detector of the sample block to be measured through a correction program;
and the solid waste detection and classification module is connected with the central control module and is used for detecting and classifying the sample blocks to be detected according to the corrected measurement result through a solid waste detection and classification program.
Further, the radioactive solid waste detection and classification system further comprises:
the central control module is connected with the evaluation module, the data storage module and the updating display module and is used for coordinating and controlling the normal operation of each module of the radioactive solid waste detection and classification system through a central processing unit;
the evaluation module is connected with the central control module and is used for evaluating the detection and classification results of the solid waste through an evaluation program;
the data storage module is connected with the central control module and used for storing the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the evaluation result through the memory;
and the updating display module is connected with the central control module and is used for updating and displaying the acquired three-dimensional distribution data of the matrix and material density of the sample block to be measured, the scanning measurement result, the correction result, the solid waste detection classification result and the real-time data of the evaluation result through the display.
Further, the radioactive solid waste detection and classification system further comprises:
dose level radiation detection means for detecting the surface dose level of radioactive solid waste; the back of the dose horizontal radiation detection device is provided with a shielding layer, the shielding layer is arranged above the automatic conveying device, the height of the shielding layer is adjustable, and the shielding layer comprises a plurality of replaceable dose horizontal radiation detectors;
the control device comprises a mapping module and a judging module;
the mapping module is used for acquiring a fitted curve of the surface dose level and the radioactivity ratio activity, establishing a functional relation between the surface dose level and the radioactivity ratio activity, and determining the surface dose limit value range of the radioactive solid waste under different pollution grade states;
the judgment module is used for judging the pollution level of the radioactive solid waste according to the surface dose level of the specific radioactive solid waste and the surface dose limit value range of the specific radioactive solid waste in different pollution level states;
an automated conveyor for conveying radioactive solid waste;
and the mechanical screening device is used for screening the radioactive solid wastes such as the polluted sandy soil.
Further, in the fluoroscopic imaging module, the scanning and analyzing of the sample block to be detected by the X-ray fluoroscopic imaging apparatus includes:
(1) irradiating the sample block to be detected by proper pulse X-rays generated by the X-ray perspective imaging device;
(2) collecting ultrasonic signals converted by pulse X-rays produced by an X-ray emitting device in a solidified body through an ultrasonic signal collector;
(3) and comparing the ultrasonic signals with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to calculate the similarity, and acquiring the three-dimensional distribution data of the density of the matrix and the material of the sample block to be detected.
Further, the suitable pulsed X-rays generated by the fluoroscopic X-ray imaging apparatus include:
and adjusting the wavelength of the X-ray generated by the X-ray perspective imaging device so that the sample block to be detected can be acquired by the ultrasonic signal acquisition device to obtain an ultrasonic signal with a good signal.
Further, in the solid waste detection and classification module, the detection and classification of the sample block to be detected according to the corrected measurement result by the solid waste detection and classification program includes:
(1) acquiring a fitting curve of the surface dose level and the radioactivity ratio, establishing a functional relation between the surface dose level and the radioactivity ratio, and determining the surface dose limit value range of the sample block to be detected under different pollution grade states;
(2) measuring the surface dose level of the sample block to be measured;
(3) and comparing the surface dose level of the sample block to be detected and the surface dose limit value range of the sample block to be detected in different pollution grade states, judging the pollution grade of the sample block to be detected, and performing classified collection.
Further, the measuring the surface dose level of the sample block to be measured includes:
selecting and setting a corresponding dose level radiation detector according to the type of the pollution nuclide;
measuring the surface dose level of a sample block to be measured;
and correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio activity and the energy response characteristic of the dose level radiation detector of the sample block to be measured.
It is another object of the present invention to provide a computer program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for applying the radioactive solid waste detection and sorting system when executed on an electronic device.
It is another object of the present invention to provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the radioactive solid waste detection and sorting system.
Another object of the present invention is to provide an information data processing terminal, wherein the information data processing terminal is used for implementing the radioactive solid waste detection and classification system.
By combining all the technical schemes, the invention has the advantages and positive effects that: according to the radioactive solid waste detection and classification system provided by the invention, the corresponding relation between the pollution level of the radioactive solid waste and the surface dose level limit value range is established, the surface dose level of the radioactive solid waste is compared with the surface dose level limit value range, the pollution level of the radioactive solid waste is rapidly determined, and classified collection is realized, so that the treatment, disposal and management capabilities of the solid radioactive waste are greatly improved. The method is closer to the actual situation of the site, is convenient to implement on the site, has more credible evaluation results, can analyze and evaluate the composition and activity of the radionuclide in the waste bag, and meets the requirements related to the treatment of the radioactive waste.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a radioactive solid waste detection and classification system provided in an embodiment of the present invention;
in the figure: 1. a sample pre-processing module; 2. a perspective imaging module; 3. a central control module; 4. a scanning measurement module; 5. a measurement result correction module; 6. a solid waste detection and classification module; 7. an evaluation module; 8. a data storage module; 9. and updating the display module.
FIG. 2 is a flow chart of the radioactive solid waste detection and classification method provided by the embodiment of the invention.
Fig. 3 is a flowchart of a method for performing scanning analysis on a sample block to be detected by a fluoroscopic imaging module using a fluoroscopic imaging apparatus according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for measuring specific radioactivity according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for detecting and classifying a sample block to be detected according to a corrected measurement result by using a solid waste detection and classification program through a solid waste detection and classification module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems of the prior art, the present invention provides a radioactive solid waste detection and classification system, which is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the radioactive solid waste detection and classification system provided by the embodiment of the present invention includes: the system comprises a sample preprocessing module 1, a perspective imaging module 2, a central control module 3, a scanning measurement module 4, a measurement result correction module 5, a solid waste detection and classification module 6, an evaluation module 7, a data storage module 8 and an update display module 9.
The sample pretreatment module 1 is connected with the central control module 3 and is used for collecting radioactive solid waste samples, sorting the radioactive solid waste and preparing sample blocks to be detected with the same size and weight;
the perspective imaging module 2 is connected with the central control module 3 and is used for scanning and analyzing the sample block to be detected through an X-ray perspective imaging device to obtain three-dimensional distribution data of the matrix and material density of the sample block to be detected;
the central control module 3 is connected with the sample pretreatment module 1, the perspective imaging module 2, the scanning measurement module 4, the measurement result correction module 5, the solid waste detection and classification module 6, the evaluation module 7, the data storage module 8 and the update display module 9, and is used for coordinating and controlling the normal operation of each module of the radioactive solid waste detection and classification system through a central processing unit;
the scanning measurement module 4 is connected with the central control module 3 and is used for measuring the surface dose level, the type of the pollution nuclide and the specific activity of the radioactivity of the sample block to be measured through a high-purity germanium gamma spectrometer;
the measurement result correction module 5 is connected with the central control module 3 and used for correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio and the energy response characteristic of the dose level radiation detector of the sample block to be detected through a correction program;
the solid waste detection and classification module 6 is connected with the central control module 3 and is used for detecting and classifying the sample blocks to be detected according to the corrected measurement result through a solid waste detection and classification program;
the evaluation module 7 is connected with the central control module 3 and is used for evaluating the detection and classification results of the solid waste through an evaluation program;
the data storage module 8 is connected with the central control module 3 and is used for storing the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the evaluation result through a memory;
and the updating display module 9 is connected with the central control module 3 and is used for updating and displaying the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the real-time data of the evaluation result through a display.
The radioactive solid waste detection and classification system provided by the embodiment of the invention further comprises:
dose level radiation detection means for detecting the surface dose level of radioactive solid waste; the back of the dose horizontal radiation detection device is provided with a shielding layer, the shielding layer is arranged above the automatic conveying device, the height of the shielding layer is adjustable, and the shielding layer comprises a plurality of replaceable dose horizontal radiation detectors;
the control device comprises a mapping module and a judging module; the mapping module is used for acquiring a fitted curve of the surface dose level and the radioactivity ratio activity, establishing a functional relation between the surface dose level and the radioactivity ratio activity, and determining the surface dose limit value range of the radioactive solid waste under different pollution grade states; the determination module is used for determining the pollution level of the radioactive solid waste according to the surface dose level of the specific radioactive solid waste and the surface dose limit value range of the specific radioactive solid waste in different pollution level states.
An automated conveyor for conveying radioactive solid waste;
and the mechanical screening device is used for screening the radioactive solid wastes such as the polluted sandy soil.
As shown in fig. 2, the method for detecting and classifying radioactive solid waste provided by the embodiment of the present invention includes the following steps:
s101, collecting radioactive solid waste samples through a sample pretreatment module, sorting the radioactive solid waste, and preparing sample blocks to be detected with the same size and weight;
s102, scanning and analyzing the sample block to be detected by using an X-ray perspective imaging device through a perspective imaging module to obtain three-dimensional distribution data of the matrix and material density of the sample block to be detected;
s103, the normal operation of each module of the radioactive solid waste detection and classification system is coordinated and controlled by a central control module through a central processing unit;
s104, measuring the surface dose level, the type of the pollution nuclide and the radioactivity of the sample block to be measured by using a high-purity germanium gamma spectrometer through a scanning measurement module;
s105, correcting the measurement result by using a measurement result correction module according to the type of the pollution nuclide, the radioactivity ratio and the energy response characteristic of the dose level radiation detector of the sample block to be measured by using a correction program;
s106, detecting and classifying the sample blocks to be detected by the solid waste detection and classification module according to the corrected measurement result by utilizing a solid waste detection and classification program; evaluating the detection and classification result of the solid waste by an evaluation module by using an evaluation program;
s107, storing the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the evaluation result by using a memory through a data storage module;
and S108, updating and displaying the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the real-time data of the evaluation result by using the display through the updating and displaying module.
As shown in fig. 3, in step S102 provided in the embodiment of the present invention, the performing a scanning analysis on a sample block to be detected by using an X-ray fluoroscopic imaging apparatus through a fluoroscopic imaging module includes:
s201, irradiating a sample block to be detected by using a proper pulse X-ray generated by an X-ray perspective imaging device;
s202, collecting ultrasonic signals converted by pulse X-rays produced by an X-ray emitting device in a solidified body through an ultrasonic signal collector;
and S203, comparing the ultrasonic signals with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to calculate the similarity, and acquiring the three-dimensional distribution data of the density of the matrix and the material of the sample block to be detected.
The embodiment of the invention provides a suitable pulse X-ray generated by an X-ray perspective imaging device, which comprises:
and adjusting the wavelength of the X-ray generated by the X-ray perspective imaging device so that the sample block to be detected can be acquired by the ultrasonic signal acquisition device to obtain an ultrasonic signal with a good signal.
As shown in fig. 4, in step S104, the measuring of specific radioactivity according to the embodiment of the present invention includes:
s301, measuring to obtain a gamma original spectrum and a beta-gamma coincidence spectrum;
s302, obtaining beta-ray efficiency scales and gamma-ray efficiency scales by spectrum decomposition;
and S303, calculating the nuclide activity of the radioactive gas by utilizing the beta-ray efficiency scale and the gamma-ray efficiency scale.
The calculation formula of the scale beta-ray detection efficiency provided by the embodiment of the invention is as follows:
in the formula, nγIs the original spectrum gamma ray peak count rate, nγcFor coincidence spectrum gamma ray peak count rate, PβIs the beta ray emission probability.
As shown in fig. 5, in step S106 provided in the embodiment of the present invention, the detecting and classifying the sample block to be detected by the solid waste detecting and classifying module according to the corrected measurement result by using the solid waste detecting and classifying program includes:
s401, acquiring a fitting curve of the surface dose level and the radioactivity ratio, establishing a functional relation between the surface dose level and the radioactivity ratio, and determining the surface dose limit value range of the sample block to be detected under different pollution grade states;
s402, measuring the surface dose level of the sample block to be measured;
and S403, comparing the surface dose level of the sample block to be detected and the surface dose limit value ranges thereof in different pollution grade states, judging the pollution grade of the sample block to be detected, and performing classified collection.
The method for measuring the surface dose level of the sample block to be measured provided by the embodiment of the invention comprises the following steps:
selecting and setting a corresponding dose level radiation detector according to the type of the pollution nuclide;
measuring the surface dose level of a sample block to be measured;
and correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio activity and the energy response characteristic of the dose level radiation detector of the sample block to be measured.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A radioactive solid waste detection and classification system, comprising:
the sample pretreatment module is connected with the central control module and is used for collecting radioactive solid waste samples, sorting the radioactive solid waste and preparing sample blocks to be detected with the same size and weight;
the perspective imaging module is connected with the central control module and is used for scanning and analyzing the sample block to be detected through the X-ray perspective imaging device to obtain three-dimensional distribution data of the matrix and material density of the sample block to be detected;
the central control module is connected with the sample pretreatment module, the perspective imaging module, the scanning measurement module, the measurement result correction module and the solid waste detection and classification module and is used for coordinating and controlling the normal operation of each module of the radioactive solid waste detection and classification system through a central processing unit;
the scanning measurement module is connected with the central control module and is used for measuring the surface dose level, the type of the pollution nuclide and the radioactivity ratio of the sample block to be measured through a high-purity germanium gamma spectrometer;
wherein the measurement of specific activity comprises:
measuring to obtain a gamma original spectrum and a beta-gamma coincidence spectrum;
resolving the spectrum to obtain beta ray efficiency scales and gamma ray efficiency scales; the calculation formula of the scale beta-ray detection efficiency is as follows:
in the formula, nγIs the original spectrum gamma ray peak count rate, nγcFor coincidence spectrum gamma ray peak count rate, PβIs the beta ray emission probability;
calculating the activity of the radioactive gas nuclide by utilizing the beta ray efficiency scale and the gamma ray efficiency scale;
the measurement result correction module is connected with the central control module and used for correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio and the energy response characteristic of the dose level radiation detector of the sample block to be measured through a correction program;
and the solid waste detection and classification module is connected with the central control module and is used for detecting and classifying the sample blocks to be detected according to the corrected measurement result through a solid waste detection and classification program.
2. The radioactive solid waste detection and sorting system of claim 1, further comprising:
the central control module is connected with the evaluation module, the data storage module and the updating display module and is used for coordinating and controlling the normal operation of each module of the radioactive solid waste detection and classification system through a central processing unit;
the evaluation module is connected with the central control module and is used for evaluating the detection and classification results of the solid waste through an evaluation program;
the data storage module is connected with the central control module and used for storing the acquired three-dimensional distribution data of the matrix and material density of the sample block to be detected, the scanning measurement result, the correction result, the solid waste detection classification result and the evaluation result through the memory;
and the updating display module is connected with the central control module and is used for updating and displaying the acquired three-dimensional distribution data of the matrix and material density of the sample block to be measured, the scanning measurement result, the correction result, the solid waste detection classification result and the real-time data of the evaluation result through the display.
3. The radioactive solid waste detection and sorting system of claim 1, further comprising:
dose level radiation detection means for detecting the surface dose level of radioactive solid waste; the back of the dose horizontal radiation detection device is provided with a shielding layer, the shielding layer is arranged above the automatic conveying device, the height of the shielding layer is adjustable, and the shielding layer comprises a plurality of replaceable dose horizontal radiation detectors;
the control device comprises a mapping module and a judging module;
the mapping module is used for acquiring a fitted curve of the surface dose level and the radioactivity ratio activity, establishing a functional relation between the surface dose level and the radioactivity ratio activity, and determining the surface dose limit value range of the radioactive solid waste under different pollution grade states;
the judgment module is used for judging the pollution level of the radioactive solid waste according to the surface dose level of the specific radioactive solid waste and the surface dose limit value range of the specific radioactive solid waste in different pollution level states;
an automated conveyor for conveying radioactive solid waste;
and the mechanical screening device is used for screening the radioactive solid wastes such as the polluted sandy soil.
4. The radioactive solid waste detection and classification system according to claim 1, wherein in the fluoroscopy imaging module, the scanning analysis of the sample block to be tested by the X-ray fluoroscopy imaging device comprises:
(1) irradiating the sample block to be detected by proper pulse X-rays generated by the X-ray perspective imaging device;
(2) collecting ultrasonic signals converted by pulse X-rays produced by an X-ray emitting device in a solidified body through an ultrasonic signal collector;
(3) and comparing the ultrasonic signals with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to calculate the similarity, and acquiring the three-dimensional distribution data of the density of the matrix and the material of the sample block to be detected.
5. The radioactive solid waste detection and sorting system of claim 4, wherein said suitable pulsed X-rays generated by the fluoroscopic imaging apparatus comprise:
and adjusting the wavelength of the X-ray generated by the X-ray perspective imaging device so that the sample block to be detected can be acquired by the ultrasonic signal acquisition device to obtain an ultrasonic signal with a good signal.
6. The radioactive solid waste detection and classification system according to claim 1, wherein the detection and classification of the sample block to be tested according to the corrected measurement result by the solid waste detection and classification program in the solid waste detection and classification module comprises:
(1) acquiring a fitting curve of the surface dose level and the radioactivity ratio, establishing a functional relation between the surface dose level and the radioactivity ratio, and determining the surface dose limit value range of the sample block to be detected under different pollution grade states;
(2) measuring the surface dose level of the sample block to be measured;
(3) and comparing the surface dose level of the sample block to be detected and the surface dose limit value range of the sample block to be detected in different pollution grade states, judging the pollution grade of the sample block to be detected, and performing classified collection.
7. The radioactive solid waste detection and sorting system of claim 6, wherein said measuring a surface dose level of a sample block to be tested comprises:
selecting and setting a corresponding dose level radiation detector according to the type of the pollution nuclide;
measuring the surface dose level of a sample block to be measured;
and correcting the measurement result according to the type of the pollution nuclide, the radioactivity ratio activity and the energy response characteristic of the dose level radiation detector of the sample block to be measured.
8. A computer program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for applying the radioactive solid waste detection sorting system of any one of claims 1 to 7 when executed on an electronic device.
9. A computer readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the radioactive solid waste detection and sorting system of any one of claims 1 to 7.
10. An information data processing terminal, characterized in that the information data processing terminal is used for realizing the radioactive solid waste detection and classification system according to any one of claims 1 to 7.
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