Method, apparatus, device, storage medium and program product for classifying radioactive waste

Abstract

The application relates to a radioactive waste classification method, device, equipment, storage medium and program product. The method comprises the following steps: detecting a first surface radiation level of target radioactive waste to be classified, and performing first classification on the target radioactive waste according to a comparison result of the first surface radiation level and a first surface radiation level threshold value, so as to determine an initial waste type of the target radioactive waste, wherein the initial waste type comprises a suspected extremely low level type and a low level type. If the initial waste type is the suspected extremely low level type, second classification is performed on the target radioactive waste according to a radioactive substance radiation decay rate of the target radioactive waste, so as to determine a decay type of the target radioactive waste. Third classification is performed on the target radioactive waste according to the decay type of the target radioactive waste, so as to determine a final waste type of the target radioactive waste, wherein the final waste type comprises an extremely low level type and a low level type. The classification result obtained by the method is more accurate.

Description

Technical Field

[0001] This application relates to the field of radioactive waste classification technology, and in particular to a radioactive waste classification method, apparatus, equipment, storage medium, and program product. Background Technology

[0002] With the development of nuclear power technology, nuclear power plants will generate a lot of radioactive waste. The treatment of radioactive waste requires classification first, and different treatment methods are used depending on the category.

[0003] Traditional methods classify radioactive waste by measuring the activity of radionuclides. However, when radioactive waste is mixed, a single measurement method cannot meet the requirements for identifying all radioactive characteristics, and the classification of radioactive waste is not accurate enough. Summary of the Invention

[0004] Therefore, it is necessary to provide a more accurate method, apparatus, equipment, storage medium, and procedure for classifying radioactive waste, addressing the aforementioned technical problems.

[0005] Firstly, this application provides a method for classifying radioactive waste. The method includes: detecting a first surface radiation level of the target radioactive waste to be classified, and performing a first classification of the target radioactive waste based on a comparison between the first surface radiation level and a first surface radiation level threshold to determine an initial waste type, including suspected extremely low-level radioactive waste and low-level radioactive waste; if the initial waste type is suspected extremely low-level radioactive waste, performing a second classification of the target radioactive waste based on the radioactive decay rate of the radioactive material to determine the decay type of the target radioactive waste; and performing a third classification of the target radioactive waste based on the decay type of the target radioactive waste to determine a final waste type, including extremely low-level radioactive waste and low-level radioactive waste.

[0006] In one embodiment, the target radioactive waste is classified a third time according to its decay type, including: if the decay type of the target radioactive waste is slow decay, the final waste type of the target radioactive waste is determined to be low-level in the third classification.

[0007] In one embodiment, the target radioactive waste is classified a third time according to its decay type, including: if the target radioactive waste has a fast decay type, the target radioactive waste is temporarily stored for a preset time, and after the preset time, the target radioactive waste is classified a third time.

[0008] In one embodiment, before temporarily storing the target radioactive waste for a preset time, the method further includes: determining the radiation level type of the target radioactive waste based on a first surface radiation level, wherein the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type; correspondingly, after the preset time, a third classification of the target radioactive waste is performed, including: if the radiation level of the target radioactive waste is a high radiation level type, then after the preset time, based on the comparison result of the second surface radiation level of the target radioactive waste and a second surface radiation level threshold, a third classification of the target radioactive waste is performed, and based on the final waste type of the target radioactive waste, the final waste type of a first candidate radioactive waste belonging to the same batch as the target radioactive waste is determined, wherein the radiation level type of the first candidate radioactive waste is a low radiation level type; if the radiation level of the target radioactive waste is a low radiation level type, then the final waste type of the target radioactive waste is determined based on the final waste type of a second candidate radioactive waste belonging to the same batch as the target radioactive waste, wherein the radiation level type of the second candidate radioactive waste is a high radiation level type.

[0009] In one embodiment, both the first surface radiation level threshold and the second surface radiation level threshold are determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction factor, and the conversion function of radioactivity of the waste package to surface dose rate.

[0010] In one embodiment, the target radioactive waste is further classified based on the radioactive material attenuation rate to determine its attenuation type. This includes: calculating the radioactive material attenuation rate of the target radioactive waste; comparing the radioactive material attenuation rate of the target radioactive waste with the cobalt-60 attenuation rate; if the radioactive material attenuation rate of the target radioactive waste is greater than or equal to the cobalt-60 attenuation rate, the attenuation type of the target radioactive waste is fast attenuation; if the radioactive material attenuation rate of the target radioactive waste is less than the cobalt-60 attenuation rate, the attenuation type of the target radioactive waste is slow attenuation.

[0011] In one embodiment, calculating the radioactive material attenuation rate of the target radioactive waste includes: detecting the surface radiation levels of the target radioactive waste at two different time periods; and calculating the radioactive material attenuation rate of the target radioactive waste based on the two surface radiation levels at different time periods.

[0012] Secondly, this application also provides a radioactive waste sorting device. The device includes:

[0013] The first classification module is used to detect the first surface radiation level of the target radioactive waste to be classified, and to perform the first classification of the target radioactive waste based on the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste. The initial waste type includes suspected extremely low radioactive type and low radioactive type.

[0014] The second classification module is used to classify the target radioactive waste a second time based on the radioactive material attenuation rate of the target radioactive waste if the initial waste type is suspected to be extremely low radioactive.

[0015] The third classification module is used to classify the target radioactive waste a third time according to its decay type to determine the final waste type, which includes extremely low radioactivity and low radioactivity.

[0016] In one embodiment, the third classification module is specifically used to determine the final waste type of the target radioactive waste as low-level radioactive waste in the third classification if the decay type of the target radioactive waste is slow decay type.

[0017] In one embodiment, the third classification module is specifically used to temporarily store the target radioactive waste for a preset time if the decay type of the target radioactive waste is fast decay type, and then perform a third classification on the target radioactive waste after the preset time.

[0018] In one embodiment, a fourth classification module is further included, used to determine the radiation level type of the target radioactive waste based on the first surface radiation level, wherein the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type; correspondingly, after a preset time period, a third classification is performed on the target radioactive waste, including: if the radiation level of the target radioactive waste is a high radiation level type, then after a preset time period, based on the comparison result of the second surface radiation level of the target radioactive waste and the second surface radiation level threshold, a third classification is performed on the target radioactive waste, and based on the final waste type of the target radioactive waste, the final waste type of the first candidate radioactive waste belonging to the same batch as the target radioactive waste is determined, wherein the radiation level type of the first candidate radioactive waste is a low radiation level type; if the radiation level of the target radioactive waste is a low radiation level type, then the final waste type of the target radioactive waste is determined based on the final waste type of the second candidate radioactive waste belonging to the same batch as the target radioactive waste, wherein the radiation level type of the second candidate radioactive waste is a high radiation level type.

[0019] In one embodiment, both the first surface radiation level threshold and the second surface radiation level threshold are determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction factor, and the conversion function of radioactivity of the waste package to surface dose rate.

[0020] In one embodiment, the second classification module is specifically used to calculate the radioactive material radiation decay rate of the target radioactive waste; compare the radioactive material radiation decay rate of the target radioactive waste with the cobalt-60 radiation decay rate; if the radioactive material radiation decay rate of the target radioactive waste is greater than or equal to the cobalt-60 radiation decay rate, then the decay type of the target radioactive waste is fast decay type; if the radioactive material radiation decay rate of the target radioactive waste is less than the cobalt-60 radiation decay rate, then the decay type of the target radioactive waste is slow decay type.

[0021] In one embodiment, the second classification module is specifically used to detect the surface radiation levels of the target radioactive waste at two different time periods; and to calculate the radioactive material radiation decay rate of the target radioactive waste based on the two surface radiation levels at different time periods.

[0022] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the above-described radioactive waste classification method.

[0023] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the above-described radioactive waste classification method.

[0024] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the aforementioned radioactive waste classification method.

[0025] The aforementioned radioactive waste classification method, apparatus, equipment, storage medium, and program products first detect the first surface radiation level of the target radioactive waste to be classified, and perform a first classification based on a comparison between the first surface radiation level and a first surface radiation level threshold to determine the initial waste type of the target radioactive waste. The initial waste type includes suspected extremely low radioactivity and low radioactivity. Then, if the initial waste type of the target radioactive waste is suspected extremely low radioactivity, a second classification is performed based on the radioactive decay rate of the target radioactive waste to determine the decay type of the target radioactive waste. Finally, a third classification is performed based on the decay type of the target radioactive waste to determine the final waste type of the target radioactive waste. The final waste type includes extremely low radioactivity and low radioactivity. If the target radioactive waste is initially classified as potentially extremely low-level radioactive waste, a second classification is performed based on its radiation decay rate. Then, a third classification is conducted based on the same radiation decay rate to determine whether the final type of the target radioactive waste is extremely low-level or low-level radioactive waste. This process of multiple classifications, which comprehensively considers both the radiation level and the radiation decay rate of the radioactive waste, results in a more accurate classification outcome. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating a radioactive waste classification method in one embodiment;

[0027] Figure 2 This is a flowchart illustrating a radioactive waste sorting method in another embodiment;

[0028] Figure 3 This is a schematic diagram of the radioactive waste sorting process in another embodiment;

[0029] Figure 4 This is a flowchart illustrating a radioactive waste sorting method in another embodiment;

[0030] Figure 5 Here is a flowchart of a radioactive waste sorting method in one embodiment;

[0031] Figure 6 This is a structural block diagram of a radioactive waste sorting device in one embodiment;

[0032] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] In one embodiment, such as Figure 1 As shown, a method for classifying radioactive waste is provided. The method is illustrated using a terminal as an example. It is understood that this method can also be applied to a server, and to a system including both a terminal and a server, and is implemented through interaction between the terminal and the server. The method includes the following steps:

[0035] Step 101: Detect the first surface radiation level of the target radioactive waste to be classified, and perform the first classification of the target radioactive waste based on the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste.

[0036] The initial waste type includes suspected extremely low-level (ELL) and low-level (LL) types. The target radioactive waste is the radioactive waste to be classified. The first surface radiation level threshold is a limit used to determine whether the target radioactive waste is a suspected extremely low-level (ELL) or low-level (LL) type. The first surface radiation level can be the surface radiation level of the target radioactive waste collected during the collection phase. If the first surface radiation level is greater than or equal to the first surface radiation level threshold, the initial waste type of the target radioactive waste is low-level (LL). If the first surface radiation level is less than the first surface radiation level threshold, the initial waste type of the target radioactive waste is a suspected extremely low-level (ELL) type, meaning it may be an extremely low-level (ELL) type, and further judgment is needed to ensure the accuracy of the classification.

[0037] Step 102: If the initial waste type is suspected to be extremely low radioactive, the target radioactive waste is classified a second time according to the radioactive material attenuation rate of the target radioactive waste to determine the attenuation type of the target radioactive waste.

[0038] The radioactive decay rate is used to characterize the decay rate of radioactive materials in the target radioactive waste. If the initial waste type of the target radioactive waste is determined to be a suspected extremely low-level radioactive waste after the first classification, a second classification is performed based on the radioactive decay rate of the radioactive materials to further improve the accuracy of the classification and determine the decay type of the target radioactive waste. The decay type can include fast decay type and slow decay type.

[0039] Step 103: Based on the decay type of the target radioactive waste, perform a third classification of the target radioactive waste to determine its final waste type.

[0040] The final waste types include extremely low-level and low-level types. After determining the decay type of the target radioactive waste, a third classification is performed based on the decay type. Optionally, if the target radioactive waste is of the fast decay type, it is temporarily stored for a preset time before being classified a third time based on its surface radiation level; if the target radioactive waste is of the slow decay type, it is classified as a low-level type.

[0041] In the above embodiment, firstly, the first surface radiation level of the target radioactive waste to be classified is detected, and the target radioactive waste is classified for the first time based on the comparison result of the first surface radiation level and the first surface radiation level threshold to determine the initial waste type of the target radioactive waste. The initial waste type includes suspected extremely low radioactivity type and low radioactivity type. Then, if the initial waste type of the target radioactive waste is suspected extremely low radioactivity type, the target radioactive waste is classified for the second time based on the radiation decay rate of the radioactive material to determine the decay type of the target radioactive waste. Finally, the target radioactive waste is classified for the third time based on the decay type of the target radioactive waste to determine the final waste type of the target radioactive waste. The final waste type includes extremely low radioactivity type and low radioactivity type. By determining the target radioactive waste as suspected extremely low radioactivity type through the first classification, performing a second classification based on the radiation decay rate of the target radioactive waste, and then performing a third classification based on the radiation decay rate of the target radioactive waste to determine whether the final type of the target radioactive waste is extremely low radioactivity type or low radioactivity type, this method of determining the final type of the target radioactive waste by comprehensively considering the radiation level and radiation decay rate of the radioactive waste after multiple classifications results in a more accurate classification result.

[0042] In the embodiments of this application, the first surface radiation level threshold and the second surface radiation level threshold are both determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction coefficient, and the conversion function of radioactivity of the waste package to the surface dose rate.

[0043] Based on the production activities of the nuclear power plant, different waste streams are established. Different production operations correspond to different waste streams, and each waste stream is unique, consisting of waste generated from the same treatment process. By dividing the waste into different streams, the surface radiation level threshold of the waste is determined during the waste classification process. Under normal operating conditions at the nuclear power plant, based on the routine nuclide spectrum composition, the surface radiation level of the standard packaged extremely low radioactive waste in the initial collection phase is calculated using software, as shown in the following formula:

[0044]

[0045] Among them, D jU The threshold for surface radiation level of extremely low radioactive waste packages; F(X) j ) represents the relationship between source term activity and surface contact dose rate of standard waste packages of different densities; m i is the weight of the radioactive waste; k is the threshold correction factor, which is 1.1 under normal operating conditions; n is the type of radionuclide in the radioactive waste; P iv C represents the activity concentration of a radionuclide. im This refers to the activity concentration limit for radionuclides in extremely low-level radioactive waste. F(X) j The ratio of source activity to surface contact dose rate for specific packaging wastes, such as 200-liter metal drums and 5kg plastic bags, was calculated using software. jU Different waste streams have different values.

[0046] Optionally, when a nuclear power plant is in an accident condition, the threshold correction coefficient k can be corrected by verifying the proportion of difficult-to-detect nuclides in the total activity of nuclear waste source terms through activity verification measurements of difficult-to-detect nuclides.

[0047] The first surface radiation level threshold is used as a judgment threshold during the first classification, and is used to determine the type of waste package during the collection phase, and to determine the weight of radioactive waste and F(X) of the waste package during the collection phase. j The second surface radiation level threshold is calculated according to Formula 1 above. The threshold for the second surface radiation level is the judgment threshold for the third classification, based on the radioactive waste weight of the waste package corresponding to the third classification and F(X). j ), which is calculated according to the above formula.

[0048] In one embodiment, after a first classification based on the surface radiation level of the waste package, a second classification is performed on the target radioactive waste based on the radioactive material attenuation rate to determine the attenuation type of the target radioactive waste, as follows: Figure 2 As shown, it includes:

[0049] Step 201: Calculate the radioactive material attenuation rate of the target radioactive waste.

[0050] Optionally, the steps for calculating the radioactive decay rate of the target radioactive waste are as follows: Figure 3 As shown, it includes:

[0051] Step 301: Detect the surface radiation levels of the target radioactive waste at two different time periods.

[0052] Optionally, for each waste stream, the surface radiation level of the waste at different stages can be recorded using RFID tags and detection equipment on each waste package. These different stages may include waste collection, temporary storage, classification and identification, transfer, and other nodes that need to be recorded.

[0053] Step 302: Calculate the radioactive material attenuation rate of the target radioactive waste based on the two surface radiation levels at different time periods.

[0054] The radiation attenuation rate can be calculated based on the surface radiation levels measured at different times, as shown in the following formula:

[0055] (First measurement - Second measurement) / First measurement

[0056] For example, the surface radiation level of the target radioactive waste during the collection stage is the first measurement value, and the surface radiation level of the target radioactive waste during the temporary storage stage is the second measurement value. According to the above formula, the radioactive material radiation decay rate from the collection stage to the temporary storage stage can be obtained.

[0057] Step 202: Compare the radioactive material attenuation rate of the target radioactive waste with the radioactive attenuation rate of cobalt-60.

[0058] The calculated radioactive decay rate of the target radioactive waste was compared with the radioactive decay rate of cobalt-60 over the same decay time.

[0059] Step 203: If the radioactive material attenuation rate of the target radioactive waste is greater than or equal to the radioactive attenuation rate of cobalt-60, then the attenuation type of the target radioactive waste is the fast attenuation type.

[0060] Step 204: If the radioactive material attenuation rate of the target radioactive waste is less than the radioactive attenuation rate of cobalt-60, then the attenuation type of the target radioactive waste is the slow attenuation type.

[0061] Optionally, to ensure the importance of screening, the target radioactive waste that has been screened as fast decay type can be repeatedly selected for different time periods to determine its decay type. If the results of multiple determinations are all fast decay type, the decay type of the target radioactive waste is determined to be fast decay type; otherwise, it is determined to be slow decay type.

[0062] In the above embodiments, the target radioactive waste is classified a second time by determining its decay type, thereby improving the reliability of the classification results. Simultaneously, a digital system is used to measure and collect various data during the radioactive waste transfer process, improving classification efficiency.

[0063] In one embodiment, after determining the decay type of the target radioactive waste, a third classification is performed on the target radioactive waste. If the decay type of the target radioactive waste is a slow decay type, then the final waste type of the target radioactive waste is determined to be low-level radioactive waste in the third classification.

[0064] If the target radioactive waste has a slow decay type, it does not meet the disposal conditions for extremely low radioactivity. Therefore, in the third classification, the final type of the target radioactive waste is classified as low radioactivity.

[0065] If the target radioactive waste has a fast decay type, it will be temporarily stored for a preset time, and after the preset time, it will be classified for the third time.

[0066] Optionally, the preset duration can be any duration greater than 2 years. For example, if the preset duration is 4 years, the target radioactive waste of the fast decay type will be temporarily stored for 4 years. Then, the surface radiation level of the target radioactive waste will be detected and compared with the second surface radiation level threshold. The target radioactive waste will be classified a third time to determine the final type of the target radioactive waste.

[0067] In one embodiment, before a preset storage period, the radiation level type of the target radioactive waste can be determined based on a first surface radiation level threshold, whereby the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type.

[0068] The first surface radiation level threshold is as described above, D. jU The first surface radiation level of the target radioactive waste is compared with D jU Compare / 2, and it is greater than or equal to D. jU The type with a radiation level of / 2 is placed in a metal container for temporary storage; the value is less than D. jU The type with a radiation level of / 2 is placed in another metal container for temporary storage.

[0069] Correspondingly, after a predetermined period such as four years, the target radioactive waste will be classified a third time in the fifth year, specifically including the following two situations:

[0070] In the first case, if the radiation level of the target radioactive waste is of the high radiation level type, then after a preset time, the target radioactive waste is classified a third time based on the comparison result between the second surface radiation level and the second surface radiation level threshold of the target radioactive waste, and the final waste type of the first candidate radioactive waste belonging to the same batch as the target radioactive waste is determined based on the final waste type of the target radioactive waste.

[0071] The first candidate radioactive waste is classified as having a low radiation level. Radioactive waste from the same batch as the target radioactive waste, after being sorted together, is temporarily stored in two metal containers: one for high radiation levels and the other for low radiation levels. If the target radioactive waste has a high radiation level, the second surface radiation level is the surface radiation level of the metal container storing the target radioactive waste (i.e., the high radiation level type). The threshold for the second surface radiation level is the limit for extremely low radiation waste calculated using Formula 1.

[0072] If the radiation level of the second surface is less than the radiation level threshold of the second surface, the final type of the target radioactive waste is determined to be extremely low radiation type. Since the radiation level type of the first candidate radioactive waste is low radiation level type, the final type of the first candidate radioactive waste can also be determined to be extremely low radiation type.

[0073] If the second surface radiation is greater than or equal to the second surface radiation level threshold, the final type of the target radioactive waste is determined to be low-level. At this time, the final type of the first candidate radioactive waste needs to be determined by further testing the surface radiation level of the first candidate radioactive waste and comparing it with the second surface radiation level threshold. If it is greater than or equal to the second surface radiation level threshold, the final type of the first candidate radioactive waste is low-level; if it is less than the second surface radiation level threshold, the final type of the first candidate radioactive waste is extremely low-level.

[0074] In the second scenario, if the radiation level of the target radioactive waste is of the low radiation level type, then the final waste type of the target radioactive waste is determined based on the final waste type of the second candidate radioactive waste belonging to the same batch as the target radioactive waste, and the radiation level type of the second candidate radioactive waste is of the high radiation level type.

[0075] If the target radioactive waste has a low radiation level, its final type is determined based on the final type of the second candidate radioactive waste with a high radiation level that is also temporarily stored. For example, if the second candidate radioactive waste's final type is extremely low radiation waste, since the target radioactive waste has a lower radiation level than the second candidate, its final type is also extremely low radiation waste. If the second candidate radioactive waste's final type is low radiation waste, it is further determined by comparing the surface radiation level of the metal container where the target radioactive waste is temporarily stored with a second surface radiation level threshold. If the surface radiation level is greater than or equal to the second surface radiation level threshold, the first candidate radioactive waste's final type is low radiation waste; if it is less than the second surface radiation level threshold, the first candidate radioactive waste's final type is extremely low radiation waste.

[0076] Optionally, to simplify the classification process, the third classification process can also be to detect the radiation level on the surface of the waste package when it is temporarily stored for five years. If it is lower than a preset threshold, it can be treated as extremely low radioactive waste. The preset threshold can be 2 μSv / h.

[0077] In the above embodiments, by classifying fast-decaying radioactive waste according to its surface radiation level before temporary storage, and then classifying it a third time after temporary storage, the efficiency of classification can be further improved.

[0078] In the embodiments of this application, please refer to Figure 4 The document illustrates a flowchart of a radioactive waste classification method provided in an embodiment of this application. The radioactive waste classification method includes the following steps:

[0079] Step 401: Detect the first surface radiation level of the target radioactive waste to be classified, and perform the first classification of the target radioactive waste based on the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste.

[0080] Step 402: If the initial waste type is suspected to be extremely low radioactive, the target radioactive waste is classified a second time according to the radioactive material attenuation rate of the target radioactive waste to determine the attenuation type of the target radioactive waste.

[0081] Step 403: Calculate the radioactive material attenuation rate of the target radioactive waste.

[0082] Step 404: Compare the radioactive decay rate of the target radioactive waste with the radioactive decay rate of cobalt-60.

[0083] Step 405: If the radioactive material attenuation rate of the target radioactive waste is greater than or equal to the radioactive attenuation rate of cobalt-60, then the attenuation type of the target radioactive waste is the fast attenuation type.

[0084] Step 406: If the radioactive material attenuation rate of the target radioactive waste is less than the radioactive attenuation rate of cobalt-60, then the attenuation type of the target radioactive waste is the slow attenuation type.

[0085] Step 407: If the decay type of the target radioactive waste is slow decay, then the final waste type of the target radioactive waste is determined to be low-level in the third classification.

[0086] Step 408: If the decay type of the target radioactive waste is fast decay, the target radioactive waste is temporarily stored for a preset time, and after the preset time, the target radioactive waste is classified for the third time.

[0087] To facilitate readers' understanding of the technical solutions provided in the embodiments of this application, the following description uses an example of applying the radioactive waste classification method of this application to a nuclear power plant. Figure 5 As shown, the waste is the radioactive waste described in this application. The waste sorting work includes three stages: work preparation, data collection and analysis, and on-site sorting.

[0088] The preparation phase includes the following tasks:

[0089] (1) Based on the nuclear power plant’s production activities, different waste streams are established. When classifying waste, the waste stream to which the waste belongs must be identified first.

[0090] (2) Check the nuclide spectrum of the main loop cooling system of the nuclear power plant to verify whether the system is within the normal operating range, and at the same time check the key nuclides in the loop. 137 Cs / 60 Co activity concentration percentage <29%. If the system is in an accident condition, adjust the threshold correction factor.

[0091] (3) Based on the software calculation, the relationship function F(X) between the source activity and surface contact dose rate of standard waste packages with different densities was obtained. j ).

[0092] (4) The threshold of surface radiation level of suspected extremely low radioactive waste package is calculated according to Formula 1 above.

[0093] (5) The above data is stored and recorded through a digital management system.

[0094] During the data acquisition and analysis phase, the main focus is on determining the decay type of waste packages, including:

[0095] (1) During the waste transfer process, the surface radiation level of each node is measured and recorded by a handheld on-site detection device.

[0096] (2) Calculate the radiation attenuation rate of the waste package based on the first and second nodes, and then compare it with the radiation attenuation rate of Co60 to classify it into fast attenuation type and slow attenuation type.

[0097] (3) If it is a fast decay type, continue to use the same method to judge based on the second and third nodes, and finally determine whether it is a fast decay type or a slow decay type.

[0098] The steps in the on-site sorting process include:

[0099] (1) Staff members measured the surface radiation level of waste using handheld on-site testing equipment during the collection phase.

[0100] (2) Determine whether it is less than the first surface radiation level threshold and perform the first classification. If it is, determine the initial type as suspected extremely low radioactive waste; otherwise, it is low radioactive waste.

[0101] (3) For the initial type of suspected extremely low radioactive waste, determine whether it is a fast decay type. If it is, temporarily store it; otherwise, determine it as low radioactive waste.

[0102] (4) Record whether the surface radiation level at the time of collection is greater than D for the corresponding waste bag of the fast decay type. jU / 2, collect them separately into two 200-liter metal drums, store them temporarily for 2.5 to 5 years, then measure the surface radiation level of the waste package in the 200-liter metal drum and compare it with the second surface radiation level threshold. If it is less than the second surface radiation level threshold, the final type is determined to be extremely low-level waste; otherwise, the final type is determined to be low-level waste.

[0103] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0104] Based on the same inventive concept, this application also provides a radioactive waste sorting device for implementing the radioactive waste sorting method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the radioactive waste sorting device provided below can be found in the limitations of the radioactive waste sorting method described above, and will not be repeated here.

[0105] In one embodiment, such as Figure 6 As shown, a radioactive waste sorting device 600 is provided, comprising: a first sorting module 601, a second sorting module 602, and a third sorting module 603, wherein:

[0106] The first classification module 601 is used to detect the first surface radiation level of the target radioactive waste to be classified, and to perform the first classification of the target radioactive waste based on the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste. The initial waste type includes suspected extremely low radioactive type and low radioactive type.

[0107] The second classification module 602 is used to classify the target radioactive waste a second time based on the radioactive material radiation decay rate of the target radioactive waste if the initial waste type is suspected to be extremely low radioactive type, so as to determine the decay type of the target radioactive waste.

[0108] The third classification module 603 is used to classify the target radioactive waste a third time according to the decay type of the target radioactive waste, so as to determine the final waste type of the target radioactive waste, which includes extremely low radioactive type and low radioactive type.

[0109] In one embodiment of this application, the third classification module 603 is specifically used to determine the final waste type of the target radioactive waste as low-level radioactive waste in the third classification if the decay type of the target radioactive waste is slow decay type.

[0110] In one embodiment of this application, the third classification module 603 is specifically used to temporarily store the target radioactive waste for a preset time if the decay type of the target radioactive waste is fast decay type, and then perform a third classification on the target radioactive waste after the preset time.

[0111] In one embodiment of this application, a fourth classification module is further included, used to determine the radiation level type of the target radioactive waste based on the first surface radiation level, wherein the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type; correspondingly, after a preset time period, a third classification is performed on the target radioactive waste, including: if the radiation level of the target radioactive waste is a high radiation level type, then after a preset time period, based on the comparison result of the second surface radiation level of the target radioactive waste and the second surface radiation level threshold, a third classification is performed on the target radioactive waste, and based on the final waste type of the target radioactive waste, the final waste type of the first candidate radioactive waste belonging to the same batch as the target radioactive waste is determined, wherein the radiation level type of the first candidate radioactive waste is a low radiation level type; if the radiation level of the target radioactive waste is a low radiation level type, then the final waste type of the target radioactive waste is determined based on the final waste type of the second candidate radioactive waste belonging to the same batch as the target radioactive waste, wherein the radiation level type of the second candidate radioactive waste is a high radiation level type.

[0112] In one embodiment of this application, both the first surface radiation level threshold and the second surface radiation level threshold are determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction factor, and the conversion function of radioactivity of the waste package to the surface dose rate.

[0113] In one embodiment of this application, the second classification module 602 is specifically used to calculate the radioactive material radiation attenuation rate of the target radioactive waste; compare the radioactive material radiation attenuation rate of the target radioactive waste with the cobalt-60 radiation attenuation rate; if the radioactive material radiation attenuation rate of the target radioactive waste is greater than or equal to the cobalt-60 radiation attenuation rate, then the attenuation type of the target radioactive waste is fast attenuation type; if the radioactive material radiation attenuation rate of the target radioactive waste is less than the cobalt-60 radiation attenuation rate, then the attenuation type of the target radioactive waste is slow attenuation type.

[0114] In one embodiment of this application, the second classification module 602 is specifically used to detect the surface radiation levels of the target radioactive waste at two different time periods; and to calculate the radioactive material radiation decay rate of the target radioactive waste based on the two surface radiation levels at different time periods.

[0115] Each module in the aforementioned radioactive waste sorting device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0116] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for classifying radioactive waste. The display unit is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0117] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0118] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0119] The first surface radiation level of the target radioactive waste to be classified is detected, and the target radioactive waste is classified for the first time based on the comparison result of the first surface radiation level and the first surface radiation level threshold to determine the initial waste type of the target radioactive waste. The initial waste type includes suspected extremely low radioactivity type and low radioactivity type. If the initial waste type is suspected extremely low radioactivity type, the target radioactive waste is classified for the second time based on the radioactive material radiation decay rate of the target radioactive waste to determine the decay type of the target radioactive waste. The target radioactive waste is classified for the third time based on the decay type of the target radioactive waste to determine the final waste type of the target radioactive waste. The final waste type includes extremely low radioactivity type and low radioactivity type.

[0120] In one embodiment, the processor, when executing the computer program, further implements the following steps: if the decay type of the target radioactive waste is slow decay type, then in the third classification, the final waste type of the target radioactive waste is determined to be low-level.

[0121] In one embodiment, when the processor executes the computer program, it further implements the following steps: if the decay type of the target radioactive waste is fast decay type, the target radioactive waste is temporarily stored for a preset time, and after the preset time, the target radioactive waste is classified for a third time.

[0122] In one embodiment, when the processor executes the computer program, it further implements the following steps: determining the radiation level type of the target radioactive waste based on a first surface radiation level, wherein the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type; correspondingly, after a preset time period, performing a third classification of the target radioactive waste, including: if the radiation level of the target radioactive waste is a high radiation level type, then after a preset time period, performing a third classification of the target radioactive waste based on a comparison result between the second surface radiation level of the target radioactive waste and a second surface radiation level threshold, and determining the final waste type of a first candidate radioactive waste belonging to the same batch as the target radioactive waste based on the final waste type of the target radioactive waste, wherein the radiation level type of the first candidate radioactive waste is a low radiation level type; if the radiation level of the target radioactive waste is a low radiation level type, then determining the final waste type of the target radioactive waste based on the final waste type of a second candidate radioactive waste belonging to the same batch as the target radioactive waste, wherein the radiation level type of the second candidate radioactive waste is a high radiation level type.

[0123] In one embodiment, both the first surface radiation level threshold and the second surface radiation level threshold are determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction factor, and the conversion function of radioactivity of the waste package to surface dose rate.

[0124] In one embodiment, when the processor executes the computer program, it further performs the following steps: calculating the radioactive material attenuation rate of the target radioactive waste; comparing the radioactive material attenuation rate of the target radioactive waste with the cobalt-60 attenuation rate; if the radioactive material attenuation rate of the target radioactive waste is greater than or equal to the cobalt-60 attenuation rate, then the attenuation type of the target radioactive waste is fast attenuation type; if the radioactive material attenuation rate of the target radioactive waste is less than the cobalt-60 attenuation rate, then the attenuation type of the target radioactive waste is slow attenuation type.

[0125] In one embodiment, the processor, when executing the computer program, also performs the following steps: detecting two surface radiation levels of the target radioactive waste at different time periods; and calculating the radioactive material radiation decay rate of the target radioactive waste based on the two surface radiation levels at different time periods.

[0126] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the radioactive waste classification methods provided in the above-described method embodiments.

[0127] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the radioactive waste classification methods provided in the above-described method embodiments.

[0128] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0129] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0130] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for classifying radioactive waste, characterized in that, The method includes: The first surface radiation level of the target radioactive waste to be classified is detected, and the target radioactive waste is classified for the first time according to the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste, the initial waste type including suspected extremely low radioactive type and low radioactive type; If the initial waste type is a suspected extremely low radioactive type, then calculate the radioactive material radiation decay rate of the target radioactive waste and compare the radioactive material radiation decay rate of the target radioactive waste with the radiation decay rate of cobalt-60. If the radioactive material attenuation rate of the target radioactive waste is greater than or equal to the radioactive attenuation rate of cobalt-60, then the attenuation type of the target radioactive waste is the fast attenuation type. If the radioactive decay rate of the target radioactive waste is less than the radioactive decay rate of cobalt-60, then the decay type of the target radioactive waste is slow decay type. Based on the decay type of the target radioactive waste, the target radioactive waste is classified a third time to determine the final waste type of the target radioactive waste, which includes extremely low radioactive type and low radioactive type.

2. The method according to claim 1, characterized in that, The third classification of the target radioactive waste based on its decay type includes: If the decay type of the target radioactive waste is slow decay, then the final waste type of the target radioactive waste is determined to be low-level in the third classification.

3. The method according to claim 1, characterized in that, The third classification of the target radioactive waste based on its decay type includes: If the target radioactive waste has a fast decay type, the target radioactive waste will be temporarily stored for a preset time, and after the preset time, the target radioactive waste will be classified for the third time.

4. The method according to claim 3, characterized in that, Before temporarily storing the target radioactive waste for a preset time, the method further includes: The radiation level type of the target radioactive waste is determined based on the first surface radiation level threshold, and the radiation level type of the target radioactive waste includes a high radiation level type and a low radiation level type. Correspondingly, the third classification of the target radioactive waste after the preset time period includes: If the radiation level of the target radioactive waste is of the high radiation level type, then after the preset time, the target radioactive waste is classified for the third time according to the comparison result between the second surface radiation level and the second surface radiation level threshold of the target radioactive waste, and the final waste type of the first candidate radioactive waste belonging to the same batch as the target radioactive waste is determined based on the final waste type of the target radioactive waste, and the radiation level type of the first candidate radioactive waste is of the low radiation level type. If the radiation level of the target radioactive waste is low, the final waste type of the target radioactive waste is determined according to the final waste type of the second candidate radioactive waste belonging to the same batch as the target radioactive waste, wherein the radiation level type of the second candidate radioactive waste is high.

5. The method according to claim 4, characterized in that, Both the first surface radiation level threshold and the second surface radiation level threshold are determined based on the radionuclide activity concentration of the waste stream to which the target radioactive waste belongs, the weight of the radioactive waste, the radionuclide activity concentration limit of the extremely low radioactive waste, the limit correction factor, and the conversion function between the radioactivity of the waste package and the surface dose rate.

6. The method according to claim 1, characterized in that, The calculation of the radioactive material attenuation rate of the target radioactive waste includes: The surface radiation levels of the target radioactive waste were detected twice at different time periods; The radioactive decay rate of the target radioactive waste was calculated based on the surface radiation levels at two different time periods.

7. A radioactive waste sorting device, characterized in that, The device includes: The first classification module is used to detect the first surface radiation level of the target radioactive waste to be classified, and to perform a first classification of the target radioactive waste based on the comparison result of the first surface radiation level and the first surface radiation level threshold, so as to determine the initial waste type of the target radioactive waste, the initial waste type including suspected extremely low radioactive type and low radioactive type; The second classification module is used to calculate the radioactive material radiation decay rate of the target radioactive waste if the initial waste type is suspected to be of very low radioactivity type, and compare the radioactive material radiation decay rate of the target radioactive waste with the radiation decay rate of cobalt-60; if the radioactive material radiation decay rate of the target radioactive waste is greater than or equal to the radiation decay rate of cobalt-60, then the decay type of the target radioactive waste is fast decay type; if the radioactive material radiation decay rate of the target radioactive waste is less than the radiation decay rate of cobalt-60, then the decay type of the target radioactive waste is slow decay type. The third classification module is used to classify the target radioactive waste a third time according to the decay type of the target radioactive waste, so as to determine the final waste type of the target radioactive waste, which includes extremely low radioactive type and low radioactive type.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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