Method, device and equipment for determining background value of radium-226 and storage medium

Abstract

The application discloses a method, device and equipment for determining a background value of radium-226 and a storage medium. The application obtains an environmental radiation gamma dose rate monitoring point; monitors the environmental radiation gamma dose rate to obtain environmental radiation gamma dose rate monitoring data and performs outlier processing to obtain a qualified monitoring point of the environmental radiation gamma dose rate; determines a radium-226 monitoring point based on the qualified monitoring point of the environmental radiation gamma dose rate and performs sampling based on the radium-226 monitoring point; monitors the activity concentration of radium-226 based on a radium-226 sampling result to obtain radium-226 activity concentration monitoring data; performs outlier processing on the radium-226 activity concentration monitoring data to determine the background value of radium-226 in soil, and the radium-226 monitoring point is quickly and accurately determined through screening of the gamma dose rate, and the background value of soil radium-226 is accurately determined according to the radium-226 monitoring point.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring technology, and in particular to a method, apparatus, equipment and storage medium for determining the background value of radium-226. Background Technology

[0002] Environmental background monitoring is an important part of environmental monitoring. In the field of non-radioactive environmental monitoring, the "Technical Regulations for Determining the Environmental Background of Surface Water and Groundwater (Provisional)" has been issued. In the field of radiation environment, the Ministry of Ecology and Environment has issued the "Technical Specifications for Radiation Environment Background Investigation Before the Operation of Nuclear Power Plants".

[0003] The relevant standards such as the "Regulations on Radiation Protection and Environmental Protection in Uranium Mining and Metallurgy" (GB23727), the "Technical Guidelines for Environmental Impact Assessment in Uranium Mining and Metallurgy" (HJ1015.1), and the "Regulations on Radiation Environmental Monitoring in Uranium Mining and Metallurgy" (GB23726) all make principled requirements for background radiation surveys, emphasizing to varying degrees the importance of background monitoring in radiation protection and environmental management in uranium mining and metallurgy.

[0004] However, due to the uncertainty of the measurement and the uneven distribution of radionuclides in the soil, the background gamma dose rate of the radiation environment and the measured value of radium-226 in the soil are within a range and fluctuate greatly. Therefore, it is not possible to reasonably and accurately determine the background gamma dose rate of the radiation environment and the background value of radium-226 in the soil for uranium mining and metallurgy. Summary of the Invention

[0005] The main objective of this invention is to provide a method, apparatus, device, and storage medium for determining the background value of radium-226, aiming to solve the technical problem that the prior art cannot reasonably and accurately determine the background value of radium-226 in soil.

[0006] To achieve the above objectives, the present invention provides a method for determining the background value of radium-226, the method comprising the following steps:

[0007] Acquire the locations of environmental radiation gamma dose rate monitoring points;

[0008] The ambient radiation gamma dose rate is monitored at the aforementioned ambient radiation gamma dose rate monitoring points to obtain ambient radiation gamma dose rate monitoring data.

[0009] Outlier processing was performed on the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate.

[0010] Radium-226 monitoring points were determined based on the qualified monitoring points of the environmental radiation gamma dose rate, and samples were taken based on the radium-226 monitoring points.

[0011] The activity concentration of radium-226 was monitored based on the radium-226 sampling results, and the activity concentration monitoring data of radium-226 was obtained.

[0012] Outlier processing was performed on the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

[0013] Optionally, the outlier processing of the radium-226 activity concentration monitoring data to determine the background value of radium-226 in the soil includes:

[0014] The radium-226 monitoring values ​​at the corresponding monitoring points are obtained based on the activity concentration monitoring data of radium-226.

[0015] Obtain the first preset background value range;

[0016] The radium-226 monitoring values ​​that are greater than the first preset background value range are removed to obtain the reference radium-226 monitoring values;

[0017] Outlier processing was performed on the reference radium-226 monitoring values, and the processed data were statistically analyzed to obtain the mean and standard deviation. The background value of radium-226 in the soil was determined based on the mean and standard deviation.

[0018] Optionally, the step of processing the reference radium-226 monitoring values ​​for outliers, performing statistical analysis on the processed data to obtain the mean and standard deviation, and determining the background value of radium-226 in the soil based on the mean and standard deviation includes:

[0019] The reference radium-226 monitoring values ​​are arranged in ascending order to obtain the sorted reference radium-226 monitoring values.

[0020] Calculate the reference radium-226 monitoring average value and the reference radium-226 monitoring standard deviation based on the aforementioned reference radium-226 monitoring values;

[0021] The deviation value in the arranged reference radium-226 monitoring values ​​is calculated based on the average value of the reference radium-226 monitoring and the arranged reference radium-226 monitoring values.

[0022] Calculate the comparison value based on the deviation value;

[0023] Obtain the number of detection level α values ​​and reference radium-226 monitoring values;

[0024] Calculate the confidence probability value based on the detection level α value;

[0025] A critical value is obtained based on the confidence probability value and the number of reference radium-226 monitoring values;

[0026] Compare the critical value with the comparison value;

[0027] When the comparison value is greater than the critical value, the reference radium-226 monitoring value corresponding to the comparison value is removed from the arranged reference radium-226 monitoring values ​​to obtain the removed radium-226 monitoring value. The removed radium-226 monitoring value is then subjected to mathematical statistics to obtain the average value and standard deviation. The background value of radium-226 in the soil is determined based on the average value and the standard deviation.

[0028] Optionally, determining the radium-226 monitoring points based on the qualified monitoring points of the ambient radiation gamma dose rate includes:

[0029] Obtain the preset layout rules and monitoring value specifications;

[0030] The location of the points is obtained based on the preset point layout rules;

[0031] The number of samples is determined based on the monitored values;

[0032] The radium-226 monitoring points are determined by the location of the sampling points and the number of samples taken at qualified monitoring points of the ambient radiation gamma dose rate.

[0033] Optionally, the acquisition of environmental radiation gamma dose rate monitoring points includes:

[0034] Obtain the background type of the environment to be monitored, the monitoring range, and the deployment rules;

[0035] When the background environment to be monitored is pre-construction background monitoring, points are placed according to the monitoring range and the point placement rules. Points are placed in a fan-shaped area formed by the first distance, the second distance, the third distance and the preset number of azimuth angles, with one point placed in each sector, to obtain the first point location and the first point quantity.

[0036] Within the factory boundary, points are placed according to the preset number of points to obtain the second point location and the second number of points.

[0037] The monitoring points for environmental radiation gamma dose rate are obtained based on the first location, the first number of locations, the second location, and the second number of locations.

[0038] Optionally, the acquisition of environmental radiation gamma dose rate monitoring points includes:

[0039] Obtain the background type and monitoring point layout rules of the environment to be monitored;

[0040] When the background environment to be monitored is the background environment before decommissioning and remediation, data on uranium mining and metallurgical activities are acquired.

[0041] The transfer trajectory of radioactive materials during uranium mining and metallurgical production was obtained based on the uranium mining and metallurgical activity data.

[0042] The monitoring range of environmental radiation gamma dose rate is determined based on the transfer trajectory of radioactive materials during the uranium mining and metallurgical production process;

[0043] Based on the environmental radiation gamma dose rate monitoring range and the specified point layout rules, monitoring points for environmental radiation gamma dose rate are determined.

[0044] Optionally, the step of monitoring the environmental radiation gamma dose rate at the environmental radiation gamma dose rate monitoring points to obtain environmental radiation gamma dose rate monitoring data includes:

[0045] When the background type of the environment to be monitored is the pre-construction background monitoring, the environmental radiation γ dose rate is monitored through the monitoring points to obtain the first environmental radiation γ dose rate monitoring data.

[0046] When the background type of the environment to be monitored is the background environment before decommissioning and remediation, the environmental radiation γ dose rate is monitored through the monitoring points to obtain the second original environmental radiation γ dose rate monitoring data.

[0047] Obtain the second preset background value range;

[0048] The second original environmental radiation γ dose rate monitoring data is compared with the second preset background value range, and the data in the second original environmental radiation γ dose rate monitoring data that are greater than the second preset background value range are removed to obtain the second environmental radiation γ dose rate monitoring data.

[0049] The first environmental radiation gamma dose rate monitoring data and the second environmental radiation gamma dose rate monitoring data are used as environmental radiation gamma dose rate monitoring data.

[0050] Furthermore, to achieve the above objectives, the present invention also proposes a device for determining the background value of radium-226, the device comprising:

[0051] The acquisition module is used to acquire the locations of environmental radiation gamma dose rate monitoring points;

[0052] The monitoring module is used to monitor the environmental radiation gamma dose rate through the environmental radiation gamma dose rate monitoring points and obtain environmental radiation gamma dose rate monitoring data.

[0053] The processing module is used to process outliers in the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate.

[0054] The determination module is used to determine the radium-226 monitoring points based on the qualified monitoring points of the ambient radiation γ dose rate, and to perform sampling based on the radium-226 monitoring points;

[0055] The monitoring module is also used to monitor the activity concentration of radium-226 based on the radium-226 sampling results, and obtain radium-226 activity concentration monitoring data;

[0056] The processing module is used to process outlier values ​​in the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

[0057] Furthermore, to achieve the above objectives, the present invention also proposes a device for determining the background value of radium-226. The device for determining the background value of radium-226 includes: a memory, a processor, and a program for determining the background value of radium-226 stored in the memory and executable on the processor. The program for determining the background value of radium-226 is configured to implement the steps of the method for determining the background value of radium-226 as described above.

[0058] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a background value determination program for radium-226, wherein when the background value determination program for radium-226 is executed by a processor, the program implements the steps of the background value determination method for radium-226 as described above.

[0059] This invention obtains environmental radiation gamma dose rate monitoring points; monitors the environmental radiation gamma dose rate at these monitoring points to obtain environmental radiation gamma dose rate monitoring data; processes outlier values ​​in the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points; determines radium-226 monitoring points based on these qualified monitoring points, and performs sampling based on these radium-226 monitoring points; monitors the activity concentration of radium-226 based on the radium-226 sampling results to obtain radium-226 activity concentration monitoring data; processes outlier values ​​in the radium-226 activity concentration monitoring data to determine the background value of radium-226 in the soil; and through gamma dose rate screening, quickly and accurately determines radium-226 monitoring points, and accurately determines the background value of radium-226 in the soil based on these monitoring points. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the structure of the device for determining the background value of radium-226 in the hardware operating environment involved in the embodiments of the present invention;

[0061] Figure 2 This is a flowchart illustrating the first embodiment of the method for determining the background value of radium-226 according to the present invention.

[0062] Figure 3 This is a flowchart illustrating a second embodiment of the method for determining the background value of radium-226 according to the present invention.

[0063] Figure 4 This is a flowchart illustrating the third embodiment of the method for determining the background value of radium-226 according to the present invention.

[0064] Figure 5 This is a flowchart illustrating the fourth embodiment of the method for determining the background value of radium-226 according to the present invention.

[0065] Figure 6 This is a structural block diagram of the first embodiment of the radium-226 background value determination device of the present invention.

[0066] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0067] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0068] Reference Figure 1 , Figure 1 A schematic diagram of the device structure for determining the background value of radium-226 in the hardware operating environment involved in the embodiments of the present invention.

[0069] like Figure 1 As shown, the device for determining the background value of radium-226 may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to establish communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0070] Those skilled in the art will understand that Figure 1The structure shown does not constitute a limitation on the apparatus for determining the background value of radium-226, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0071] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a program for determining the background value of radium-226.

[0072] exist Figure 1 In the radium-226 background value determination device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the radium-226 background value determination device of the present invention can be set in the radium-226 background value determination device. The radium-226 background value determination device calls the radium-226 background value determination program stored in the memory 1005 through the processor 1001 and executes the radium-226 background value determination method provided in the embodiment of the present invention.

[0073] This invention provides a method for determining the background value of radium-226, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the method for determining the background value of radium-226 according to the present invention.

[0074] In this embodiment, the method for determining the background value of radium-226 includes the following steps:

[0075] Step S10: Obtain the monitoring points for ambient radiation gamma dose rate.

[0076] It should be noted that the execution subject of this embodiment is the device for determining the background value of radium-226, but it can also be other devices that can achieve the same or similar functions. This embodiment does not limit this; this embodiment uses the device for determining the background value of radium-226 as an example for explanation.

[0077] It should be noted that the environmental radiation gamma dose rate monitoring points refer to the points that are set up according to the background type of the environment to be monitored, the monitoring range, and the layout regulations. The environmental radiation gamma dose rate can be monitored through the environmental radiation gamma dose rate monitoring points.

[0078] Step S20: Monitor the ambient radiation gamma dose rate at the ambient radiation gamma dose rate monitoring points to obtain ambient radiation gamma dose rate monitoring data.

[0079] It should be understood that when environmental radiation gamma dose rate monitoring points are obtained, monitoring and sampling can be performed at each location within these points to obtain environmental radiation gamma dose rate monitoring data. This data includes the environmental radiation gamma dose rate itself. The monitoring data may include values ​​that are clearly not part of the environmental background; therefore, the corresponding environmental radiation gamma dose rate monitoring data can be obtained based on the type of environmental background to be monitored. The types of environmental background to be monitored include the pre-construction environmental background and the pre-decommissioning and remediation environmental background.

[0080] Further, monitoring the environmental radiation gamma dose rate at the monitoring points to obtain environmental radiation gamma dose rate monitoring data specifically includes: when the background environment to be monitored is pre-construction environmental background monitoring, monitoring the environmental radiation gamma dose rate at the monitoring points to obtain first environmental radiation gamma dose rate monitoring data; when the background environment to be monitored is pre-decommissioning and remediation environmental background monitoring, monitoring the environmental radiation gamma dose rate at the monitoring points to obtain second original environmental radiation gamma dose rate monitoring data; obtaining a second preset background value range; comparing the second original environmental radiation gamma dose rate monitoring data with the second preset background value range, and removing data in the second original environmental radiation gamma dose rate monitoring data that are greater than the second preset background value range to obtain second environmental radiation gamma dose rate monitoring data; and using the first environmental radiation gamma dose rate monitoring data and the second environmental radiation gamma dose rate monitoring data as environmental radiation gamma dose rate monitoring data.

[0081] When the background environment to be monitored is the pre-construction background environment monitoring, monitoring and sampling can be directly carried out based on the environmental radiation gamma dose rate monitoring points of the pre-construction background environment monitoring to obtain the first environmental radiation gamma dose rate monitoring data. The first environmental radiation gamma dose rate monitoring data refers to the monitoring data of the environmental radiation gamma dose rate in the pre-construction background environment.

[0082] When the background environment to be monitored is the pre-decommissioning and remediation background environment monitoring, the environmental radiation gamma dose rate is monitored at monitoring points in the pre-decommissioning and remediation background environment to obtain the second original environmental radiation gamma dose rate monitoring data. The second original environmental radiation gamma dose rate monitoring data refers to the monitoring data of the environmental radiation gamma dose rate in the pre-decommissioning and remediation background environment. Since pre-decommissioning and remediation background environment monitoring differs from pre-construction background environment monitoring, it is necessary to add a judgment on whether the monitoring results belong to the original environmental background value. Therefore, analysis can be performed based on the characteristics of the on-site monitoring data and the potential radioactive material contamination of the plant area during the production process. The second preset background value range refers to the normal background value range of the pre-decommissioning and remediation background environment. For example, the second preset background value range is 100-200 nGy / h, but it can also be other background value ranges. This embodiment uses 100-200 nGy / h as an example for explanation. By comparing the second original environmental radiation γ dose rate monitoring data with the second preset background value range, monitoring data that do not belong to the second preset background value range are removed from the second original environmental radiation γ dose rate monitoring data, thereby obtaining the removed environmental radiation γ dose rate monitoring data, namely the second environmental radiation γ dose rate monitoring data, and the first environmental radiation γ dose rate monitoring data and the second environmental radiation γ dose rate monitoring data are used as the environmental radiation γ dose rate monitoring data.

[0083] Step S30: Perform outlier processing on the environmental radiation γ dose rate monitoring data to obtain qualified monitoring points for environmental radiation γ dose rate.

[0084] It should be understood that outlier processing of environmental radiation gamma dose rate monitoring data refers to removing outliers from the monitoring data according to the "Statistical Processing and Interpretation of Data - Processing and Judgment of Outliers in Normal Samples" (GB / T 4883-2008), thereby obtaining outlier-free monitoring data and identifying the monitoring points corresponding to this outlier-free data, i.e., the qualified monitoring points for environmental radiation gamma dose rate. Outlier processing methods may include repeated use of the Dixon test and the Grobbs test, or other methods suitable for outlier processing. This embodiment does not limit these methods; instead, it uses the Grobbs test as an example. The Grobbs test is used to calculate and query outliers in the environmental radiation gamma dose rate monitoring data, and these outliers are then removed to obtain outlier-free radiation gamma dose rate monitoring data.

[0085] Step S40: Determine the radium-226 monitoring points based on the qualified monitoring points of the ambient radiation γ dose rate, and perform sampling based on the radium-226 monitoring points.

[0086] In practice, since there is a certain correlation between the environmental gamma dose rate and radium-226 in the soil, and since monitoring the environmental gamma dose rate is relatively convenient, the radium-226 monitoring points can be obtained through the qualified monitoring points of the environmental radiation gamma dose rate. Therefore, the activity concentration of radium-226 can be sampled based on the radium-226 monitoring points, which can avoid extracting samples affected by uranium mining and metallurgical development activities.

[0087] In this embodiment, when sampling at radium-226 monitoring points, the sampling equipment is a soil sampler or sampling shovel. Topsoil is collected vertically to a depth of 10 cm, stones, weeds, etc., and 2 kg to 3 kg of mixed sample is bagged and sealed to obtain the radium-226 sampling results. The soil sampling method follows the "Regulations for Radiation Environmental Monitoring in Uranium Mining and Metallurgy" (GB 23726), the "Technical Specifications for Radiation Environmental Monitoring" (HJ 61), and the "General Provisions for Soil Sample Collection and Preparation in Environmental Nuclear Radiation Monitoring" (EJ / T428), with no fewer than 16 samples taken.

[0088] Step S50: Based on the radium-226 sampling results, monitor the activity concentration of radium-226 to obtain radium-226 activity concentration monitoring data.

[0089] Understandably, after sampling at radium-226 monitoring points, the activity concentration of radium-226 can be monitored and analyzed based on the sampling results, thereby obtaining specific radium-226 activity concentration monitoring data. The monitoring of radium-226 in soil can be carried out in accordance with the provisions of "Analysis Method of Radionuclide γ-ray Spectroscopy in Soil" (GB / T 11743), "Radiochemical Analysis Method of Radium-226 in Soil" (EJ / T 1117), or "Determination of Ra226 in Rock Samples by Gas Ejection Method" (GB / T 13073).

[0090] Step S60: Perform outlier processing on the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

[0091] In this embodiment, since the acquired radium-226 activity concentration monitoring data may contain monitoring values ​​that are not clearly within the background range and subtle outliers, outlier processing can be performed on the radium-226 activity concentration monitoring data to remove outliers. This allows the normal values ​​of radium-226 activity concentration to be obtained. Statistical analysis is then performed on these normal values ​​to obtain the mean and standard deviation. The background value of radium-226 in the soil can then be determined based on the mean and standard deviation. The method for determining the background value of radium-226 in this embodiment can also be used to determine the background value of radium-226 in other media, such as water; this embodiment does not impose any limitations on this.

[0092] This embodiment acquires environmental radiation gamma dose rate monitoring points; monitors the environmental radiation gamma dose rate at these monitoring points to obtain environmental radiation gamma dose rate monitoring data; performs outlier processing on the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate; determines radium-226 monitoring points based on these qualified monitoring points, and performs sampling based on these radium-226 monitoring points; monitors the activity concentration of radium-226 based on the radium-226 sampling results to obtain radium-226 activity concentration monitoring data; performs outlier processing on the radium-226 activity concentration monitoring data to determine the background value of radium-226 in the soil; and through gamma dose rate screening, quickly and accurately determines radium-226 monitoring points, and accurately determines the background value of radium-226 in the soil based on these monitoring points.

[0093] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the method for determining the background value of radium-226 according to the present invention.

[0094] Based on the first embodiment described above, step S60 of the method for determining the background value of radium-226 in this embodiment specifically includes:

[0095] Step S601: Obtain the radium-226 monitoring value at the corresponding monitoring point based on the activity concentration monitoring data of radium-226.

[0096] It should be noted that after obtaining the activity concentration detection data of radium-226, the radium-226 monitoring value corresponding to each monitoring point can be obtained. The radium-226 monitoring value is then processed and calculated to remove outliers and obtain the normal value of radium-226 monitoring value.

[0097] Step S602: Obtain the first preset background value range.

[0098] It should be noted that the first preset background value range refers to the normal background value range of radium-226 activity concentration in the environmental background before construction or before decommissioning and remediation. The first preset background value range can be set and obtained according to the specific monitoring range and environmental type. For example, the second preset background value range can be 100-200 nGy / h, or other background value ranges. This embodiment does not limit this. This embodiment uses 100-200 nGy / h as an example for explanation.

[0099] Step S603: Remove the monitoring values ​​of radium-226 that are greater than the first preset background value range to obtain the reference radium-226 monitoring value.

[0100] In practice, based on experience and technical considerations, values ​​significantly exceeding the first preset background value range can be removed from the radium-226 monitoring values. For example, if the radium-226 monitoring value is 400 nGy / h, and the first preset background value range is 100-200 nGy / h, then the 400 nGy / h monitoring value will be removed from the radium-226 monitoring values ​​to obtain a reference radium-226 monitoring value. The reference radium-226 monitoring value refers to the monitoring value after removing those significantly exceeding the first preset background value range.

[0101] Step S604: The outlier value of the reference radium-226 monitoring value is processed, and the processed data is statistically analyzed to obtain the mean and standard deviation. The background value of radium-226 in the soil is determined based on the mean and standard deviation.

[0102] It should be understood that outlier removal from reference radium-226 monitoring values ​​refers to removing outliers from the reference radium-226 monitoring values ​​according to the standard "Statistical Processing and Interpretation of Data - Handling and Judgment of Outliers in Normal Samples" (GB / T 4883-2008), thus obtaining radium-226 values ​​without outliers. By removing outliers from the radium-226 activity concentration monitoring data, normal values ​​of radium-226 activity concentration monitoring data can be obtained. These normal values ​​are then statistically analyzed to calculate the mean and standard deviation, from which the background value of radium-226 in the soil can be obtained.

[0103] It should be noted that outlier handling methods may include the reuse of the Dixon test and the Grobbs test, as well as other outlier handling methods. This embodiment does not limit these methods; this embodiment uses the Grobbs test as an example for illustration.

[0104] Further, the outlier processing of the reference radium-226 monitoring values ​​and the statistical analysis of the processed data to obtain the mean and standard deviation, and the step of determining the background value of radium-226 in the soil based on the mean and standard deviation, specifically includes: arranging the reference radium-226 monitoring values ​​in ascending order to obtain the arranged reference radium-226 monitoring values; calculating the reference radium-226 monitoring mean and standard deviation based on the reference radium-226 monitoring values; calculating the deviation value in the arranged reference radium-226 monitoring values ​​based on the reference radium-226 monitoring mean and the arranged reference radium-226 monitoring values; and determining the background value of radium-226 in the soil based on the deviation value. The process involves: calculating a comparison value; obtaining the detection level α value and the number of reference radium-226 monitoring values; calculating a confidence probability value based on the detection level α value; obtaining a critical value based on the confidence probability value and the number of reference radium-226 monitoring values; comparing the critical value with the comparison value; when the comparison value is greater than the critical value, removing the reference radium-226 monitoring value corresponding to the comparison value from the arranged reference radium-226 monitoring values ​​to obtain the removed radium-226 monitoring values; performing mathematical statistics on the removed radium-226 monitoring values ​​to obtain the mean and standard deviation; and determining the background value of radium-226 in the soil based on the mean and standard deviation.

[0105] In practical implementation, the reference radium-226 monitoring values ​​are sorted and arranged in ascending order to obtain the sorted reference radium-226 monitoring values. The sorted reference radium-226 monitoring values ​​refer to the values ​​arranged in ascending order. For example, if the reference radium-226 monitoring values ​​are 101, 121, 110, 150, and 135, then the sorted reference radium-226 monitoring values ​​are 101, 111, 121, 135, and 150. For example, if the reference radium-226 monitoring values ​​are {x1, x2, x3...xn}, where n represents the number of reference radium-226 monitoring values, then the process of calculating the average value of the reference radium-226 monitoring values ​​is as follows: (Equation 1)

[0106]

[0107] In Equation 1, The reference values ​​are the average values ​​of radium-226 monitoring, x1, x2, x3...xn are the reference radium-226 monitoring values, and n is the number of reference radium-226 monitoring values.

[0108] The process for calculating the standard deviation of the reference radium-226 monitoring is as follows: Equation 2:

[0109]

[0110] In Equation 2, S is the standard deviation of the reference radium-226 monitoring, and x i∈{x1, x2, x3...xn}, The average value of radium-226 monitoring is used as a reference.

[0111] In this embodiment, the deviation value in the arranged reference radium-226 monitoring values ​​is calculated based on the average value of the reference radium-226 monitoring and the arranged reference radium-226 monitoring values. The maximum and minimum values ​​in the arranged reference radium-226 monitoring values ​​can be calculated with the average value of the reference radium-226 monitoring to obtain the first deviation value and the second deviation value. For example, if the average value of radium-226 monitoring is 123.5, the maximum value in the arranged reference radium-226 monitoring values ​​is 150, and the minimum value is 101, then the first deviation value is 22.5 and the second deviation value is 26.5. Since the second deviation value is greater than the first deviation value, the value of 150 in the arranged reference radium-226 monitoring values ​​corresponding to the second deviation value is taken as a suspicious value. A comparison value is then calculated based on the suspicious value. The comparison value is calculated as follows:

[0112]

[0113] Gi is the comparison value, xi is the suspicious value, and S is the standard deviation of the reference radium-226 monitoring. This is the average value of radium-226 monitoring for reference. 'i' represents the sequence number of the suspected value; for example, if the suspected value is 150, then i = 5.

[0114] In this embodiment, the detection level α value can be set according to requirements, such as 0.1, 0.08, 0.05, etc. This embodiment does not limit this; 0.05 is used as an example for illustration. The confidence probability value P is calculated using the detection level α value, which is 1-α = 0.95. After obtaining the confidence probability value, a Grubbs table is consulted based on the confidence probability value and the number of reference radium-226 monitoring values. The intersection of the horizontal and vertical columns yields the critical value. The critical value is then compared with the comparison value to determine if the comparison value is greater than the critical value. If the comparison value is greater than the critical value, the corresponding reference radium-226 monitoring value is determined to be an outlier, and the outlier is removed from the arranged reference radium-226 monitoring values. For example, the arranged reference radium-226 monitoring values ​​are 101, 111, 121, 135, and 150, with an outlier of 150. After removing the outlier, the current arranged reference radium-226 monitoring values ​​(101, 111, 121, and 135) are recalculated, and the mean and standard deviation are recalculated to calculate the comparison value. It is then determined whether the calculated comparison value is an outlier, and outlier removal is repeated. This process removes all outliers from the reference radium-226 monitoring values, resulting in the removed radium-226 monitoring values. After removing all outliers, the remaining normal monitoring data are used to calculate the mathematical mean X and standard deviation S according to GB / T 4883-2008. The background value is characterized by the statistical characteristic value of the monitoring results: X ± 2S. The background value deducted during decommissioning and remediation is represented by X + S to obtain the effective monitoring value, thus yielding the background value of radium-226 in the soil.

[0115] This embodiment obtains the radium-226 monitoring value at the corresponding monitoring point based on the activity concentration monitoring data of radium-226; obtains a first preset background value range; removes the monitoring values ​​of radium-226 that are greater than the first preset background value range to obtain a reference radium-226 monitoring value; performs outlier processing on the reference radium-226 monitoring value, and performs mathematical statistics on the processed data to obtain the average value and standard deviation; determines the background value of radium-226 in the soil based on the average value and the standard deviation, thus obtaining a scientifically reasonable background value that conforms to uranium mining and metallurgy.

[0116] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the method for determining the background value of radium-226 according to the present invention.

[0117] Based on the first embodiment described above, step S40 of the method for determining the background value of radium-226 in this embodiment specifically includes:

[0118] Step S401: Obtain the preset distribution rules and monitoring value specifications.

[0119] It should be noted that, for accurate sampling and to ensure the representativeness of the environmental background of radium-226 samples, during the monitoring process, because there is a certain correlation between the level of radium-226 and the magnitude of the environmental radiation gamma dose rate, areas with low environmental radiation gamma dose rates indicate less influence from uranium mining and metallurgical activities. Therefore, the monitoring results of environmental radiation gamma dose rates can be used as an indicator for radium-226 sampling to find sampling points that are less affected by uranium mining and metallurgical activities and close to the background level before uranium mining and metallurgical activities. For the monitoring of radium-226 in soil, the sampling, sample preparation, and sample transfer before construction can be carried out in accordance with the requirements of the "Technical Specification for Soil Environmental Monitoring" (HJ / T 166). The preset sampling point layout rules can be based on the provisions of the "Regulations for Radiation Environmental Monitoring in Uranium Mining and Metallurgy" (GB 23726). To ensure the uniformity of sampling, the preset sampling point layout rules are to sample in all 8 directions as much as possible, including points within the plant area. The monitoring value is specified to be no less than a minimum of 12. To prevent the number of sampling points after outlier removal from being too small, the total number of sampling points is no less than 16.

[0120] Step S402: Obtain the location of the points based on the preset point layout rules.

[0121] To ensure the effectiveness of testing for deviations from a normal distribution, the standard requires a minimum sample size of 8. Once the pre-defined sampling rules are followed, the specific sampling locations and the number of sampling locations can be obtained.

[0122] Step S403: Determine the number of samples based on the monitoring values.

[0123] In practice, the number of samples can be determined to be greater than or equal to 16, based on the monitoring value requirements.

[0124] Step S404: Determine the radium-226 monitoring points at the qualified monitoring points of the ambient radiation γ dose rate by using the location of the sampling points and the number of samples.

[0125] The sampling points are located at 8 locations, including those within the plant area. The number of samples taken is greater than or equal to 16. The sampling points can be set up at qualified monitoring points for ambient radiation gamma dose rate based on the sampling points. Radium-226 monitoring points are then determined at the locations after the sampling points are set up. Sampling is carried out through the radium-226 monitoring points. The soil sampling method shall be carried out in accordance with the "Regulations for Radiation Environment Monitoring in Uranium Mining and Metallurgy" (GB23726), "Technical Specifications for Radiation Environment Monitoring" (HJ61), and "General Provisions for Soil Sample Collection and Preparation in Environmental Nuclear Radiation Monitoring" (EJ / T 428). The number of samples taken shall not be less than 16. In addition to surface soil samples, 1-meter-deep profile samples shall also be taken from 4 of the points. The monitoring of radium-226 in soil can be carried out in accordance with the provisions of "Analysis Method of Radionuclides in Soil by Gamma Spectroscopy" (GB / T11743), "Analysis Method of Radiochemical Analysis of Radium-226 in Soil" (EJ / T 1117), or "Determination of Ra226 in Rock Samples by Gas Ejection Method" (GB / T 13073).

[0126] For the pre-decommissioning and remediation monitoring site selection, it should be carried out after the environmental radiation gamma dose rate monitoring is completed. Radium-226 monitoring should be conducted at randomly selected sites within the existing qualified environmental radiation gamma dose rate monitoring locations. Sampling points should cover eight directions, with a total of no fewer than 16 samples, including those within the plant boundary. This will complete the radium-226 monitoring site selection and determine the radium-226 monitoring locations.

[0127] This embodiment obtains preset sampling rules and monitoring value specifications; determines the sampling locations based on the preset rules; determines the number of samples based on the monitoring value specifications; and identifies radium-226 monitoring points at qualified monitoring locations of the environmental gamma dose rate using the sampling locations and the number of samples. Considering the cost and representativeness of radium-226 monitoring in soil, sampling points are selected based on the mathematical statistics of environmental gamma dose rate monitoring. Furthermore, given the correlation between environmental gamma dose rate and radium-226 in soil, and the convenience of environmental gamma dose rate monitoring, effective background monitoring points are obtained by monitoring the environmental gamma dose rate, avoiding samples affected by uranium mining and metallurgical activities.

[0128] refer to Figure 5 , Figure 5 This is a flowchart illustrating the fourth embodiment of the method for determining the background value of radium-226 according to the present invention.

[0129] Based on the first embodiment described above, step S10 of the method for determining the background value of radium-226 in this embodiment specifically includes:

[0130] Step S101: Obtain the background type, monitoring range, and monitoring point layout rules of the environment to be monitored.

[0131] It should be understood that the types of environmental background to be monitored include pre-construction environmental background and pre-decommissioning and remediation environmental background. The monitoring scope and site selection rules are in accordance with the provisions of the "Regulations for Radiation Environmental Monitoring in Uranium Mining and Metallurgy" (GB 23726), and should include as many different locations as possible, including the plant area and important uranium mining and metallurgical waste treatment facilities such as the proposed tailings pond, waste rock dump, and evaporation pond. At the same time, the relevant investigation technical specifications for radiation environmental background surveys of nuclear power plants and the regulations for radiation environmental monitoring in uranium mining and metallurgy should be referenced to facilitate site selection based on the monitoring scope.

[0132] Step S102: When the background type of the environment to be monitored is the background monitoring before construction, the points are placed according to the monitoring range and the point placement rules. Points are placed in the fan-shaped area formed by the first distance, the second distance, the third distance and the preset number of azimuth angles, with one point placed in each sector, to obtain the first point location and the first number of points.

[0133] When the environmental background type to be monitored is pre-construction environmental background monitoring, the first distance is 1km, the second distance is 2km, and the third distance is 5km. The preset number of azimuth angles is 16 azimuth angles. Points are placed in the fan-shaped areas formed by 1km, 2km, 5km and the 16 azimuth angles, with one point in each sector, for a total of 48 points. The positions of all fan-shaped areas are used as the first point positions, and the number of first points is obtained based on the number of points in all sectors.

[0134] Step S103: Place points within the factory boundary according to the preset number of points to obtain the second point location and the second number of points.

[0135] The number of pre-set points within the factory boundary is 2 to 3. The second point location is within the factory boundary, and the number of the second point is the same as the number of points within the factory boundary.

[0136] Step S104: Obtain the monitoring points for environmental radiation gamma dose rate based on the first location, the first number of locations, the second location, and the second number of locations.

[0137] By strategically placing monitoring points at the first and second designated locations, along with the initial and subsequent point counts, the environmental radiation gamma dose rate monitoring points are determined. The number of points within the sector can be adjusted appropriately depending on actual circumstances. This ensures representative monitoring by establishing a predetermined number of points in different locations, and by explicitly including monitoring points within the factory area, thus guaranteeing the representativeness of the background monitoring.

[0138] Furthermore, when the background environment to be monitored is the pre-decommissioning and remediation background environment monitoring, the steps for obtaining the monitoring points for environmental radiation gamma dose rate specifically include: obtaining the background environment type to be monitored and the point layout rules; when the background environment type to be monitored is the pre-decommissioning and remediation background environment monitoring, obtaining uranium mining and metallurgical activity data; obtaining the transfer trajectory of radioactive materials during uranium mining and metallurgical production based on the uranium mining and metallurgical activity data; determining the environmental radiation gamma dose rate monitoring range based on the transfer trajectory of radioactive materials during uranium mining and metallurgical production; and deploying the monitoring points according to the environmental radiation gamma dose rate monitoring range and the point layout rules to obtain the environmental radiation gamma dose rate monitoring points.

[0139] Currently, there are no regulations to guide the monitoring of the original environmental baseline before decommissioning and remediation. This differs from the environmental baseline monitoring before construction, requiring the addition of a determination to determine whether the monitoring results correspond to the original environmental baseline values.

[0140] The site selection rules can still follow the standards and specifications referenced before construction, i.e., placing points within a fan-shaped area formed by 1km, 2km, 5km and 16 azimuth angles, one point per sector, for a total of 48 points, plus 2-3 points within the plant boundary, for a total of no less than 50 points. However, during the monitoring process, it is crucial to emphasize the pre-monitoring environmental gamma radiation dose rate inspection and site selection plan, to investigate the history of uranium mining and metallurgical activities in advance, to identify areas within the mining area where the impact of uranium mining and metallurgical activities may be minimal, and to avoid the transfer trajectories of radioactive materials during uranium mining and metallurgical production. Monitoring site selection should be carried out within areas where dose rate anomalies are not caused by human production activities. The environmental radiation gamma dose rate monitoring range refers to the area within the mining area where the impact of uranium mining and metallurgical activities may be minimal. Therefore, the environmental radiation gamma dose rate monitoring points can be selected based on the environmental radiation gamma dose rate monitoring range and the aforementioned site selection rules. When selecting sites, different azimuths should be considered to ensure representativeness while also taking into account locations that may be affected by uranium mining and metallurgical development activities.

[0141] This embodiment obtains the background type, monitoring range, and point layout rules of the environment to be monitored. When the background type is pre-construction environmental background monitoring, points are laid out according to the monitoring range and the point layout rules. Points are laid out within a fan-shaped area formed by a first distance, a second distance, a third distance, and a preset number of azimuth angles, with one point per sector, to obtain the first point location and the first number of points. Points are laid out within the factory boundary according to the preset number of points, to obtain the second point location and the second number of points. The environmental radiation gamma dose rate monitoring points are obtained based on the first point location, the first number of points, the second point location, and the second number of points. The number of points in different azimuths of the background monitoring is specified to ensure the representativeness of the monitoring, and it is clarified that monitoring points within the factory area should be included, thus ensuring the representativeness of the background monitoring.

[0142] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the radium-226 background value determination device of the present invention.

[0143] like Figure 6 As shown, the device for determining the background value of radium-226 proposed in this embodiment of the invention includes:

[0144] The acquisition module 10 is used to acquire the monitoring points of environmental radiation gamma dose rate.

[0145] The monitoring module 20 is used to monitor the environmental radiation gamma dose rate through the environmental radiation gamma dose rate monitoring points and obtain environmental radiation gamma dose rate monitoring data.

[0146] The processing module 30 is used to process the outliers in the environmental radiation gamma dose rate monitoring data to obtain the qualified monitoring points of the environmental radiation gamma dose rate.

[0147] 40, used to determine radium-226 monitoring points based on the qualified monitoring points of the environmental radiation γ dose rate, and to perform sampling based on the radium-226 monitoring points.

[0148] The monitoring module 20 is also used to monitor the activity concentration of radium-226 based on the radium-226 sampling results, and obtain radium-226 activity concentration monitoring data.

[0149] The processing module 30 is used to process outlier values ​​in the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

[0150] This embodiment acquires environmental radiation gamma dose rate monitoring points; monitors the environmental radiation gamma dose rate at these monitoring points to obtain environmental radiation gamma dose rate monitoring data; performs outlier processing on the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate; determines radium-226 monitoring points based on these qualified monitoring points, and performs sampling based on these radium-226 monitoring points; monitors the activity concentration of radium-226 based on the radium-226 sampling results to obtain radium-226 activity concentration monitoring data; performs outlier processing on the radium-226 activity concentration monitoring data to determine the background value of radium-226 in the soil; and through gamma dose rate screening, quickly and accurately determines radium-226 monitoring points, and accurately determines the background value of radium-226 in the soil based on these monitoring points.

[0151] In one embodiment, the processing module 30 is further configured to: obtain radium-226 monitoring values ​​at corresponding monitoring points based on the radium-226 activity concentration monitoring data; obtain a first preset background value range; remove monitoring values ​​greater than the first preset background value range from the radium-226 monitoring values ​​to obtain reference radium-226 monitoring values; perform outlier processing on the reference radium-226 monitoring values; perform mathematical statistics on the processed data to obtain the average value and standard deviation; and determine the background value of radium-226 in the soil based on the average value and the standard deviation.

[0152] In one embodiment, the processing module 30 is further configured to: arrange the reference radium-226 monitoring values ​​in ascending order to obtain arranged reference radium-226 monitoring values; calculate the reference radium-226 monitoring average value and reference radium-226 monitoring standard deviation based on the reference radium-226 monitoring values; calculate the deviation value in the arranged reference radium-226 monitoring values ​​based on the reference radium-226 monitoring average value and the arranged reference radium-226 monitoring values; calculate the comparison value based on the deviation value; obtain the detection level α value and the number of reference radium-226 monitoring values; and, based on the detection... A confidence probability value is calculated based on the level α value; a critical value is obtained based on the confidence probability value and the number of reference radium-226 monitoring values; the critical value is compared with the comparison value; when the comparison value is greater than the critical value, the reference radium-226 monitoring value corresponding to the comparison value is removed from the arranged reference radium-226 monitoring values ​​to obtain the removed radium-226 monitoring values, and the removed radium-226 monitoring values ​​are subjected to mathematical statistics to obtain the mean and standard deviation. The background value of radium-226 in the soil is determined based on the mean and the standard deviation.

[0153] In one embodiment, the determining module 40 is further configured to acquire preset layout rules and monitoring value specifications; obtain the layout orientation based on the preset layout rules; determine the number of samples based on the monitoring value specifications; and determine the radium-226 monitoring point at the qualified monitoring point of the ambient radiation γ dose rate using the layout orientation and the number of samples.

[0154] In one embodiment, the acquisition module 10 is further configured to acquire the background type of the environment to be monitored, the monitoring range, and the point layout rules; when the background type of the environment to be monitored is pre-construction background monitoring, points are laid out according to the monitoring range and the point layout rules, and points are laid out within a fan-shaped area formed by the first distance, the second distance, the third distance, and a preset number of azimuth angles, with one point laid out for each sector, to obtain the first point location and the first number of points; points are laid out within the factory boundary according to the preset number of points, to obtain the second point location and the second number of points; the environmental radiation γ dose rate monitoring points are obtained based on the first point location, the first number of points, the second point location, and the second number of points.

[0155] In one embodiment, the acquisition module 10 is further configured to acquire the background type of the environment to be monitored and the distribution rules; when the background type of the environment to be monitored is the background monitoring of the environment before decommissioning and remediation, acquire uranium mining and metallurgical activity data; obtain the transfer trajectory of radioactive materials in the uranium mining and metallurgical production process based on the uranium mining and metallurgical activity data; determine the environmental radiation gamma dose rate monitoring range based on the transfer trajectory of radioactive materials in the uranium mining and metallurgical production process; and distribute the monitoring points according to the environmental radiation gamma dose rate monitoring range and the distribution rules to obtain the environmental radiation gamma dose rate monitoring points.

[0156] In one embodiment, the monitoring module 20 is further configured to: monitor the environmental radiation gamma dose rate at the monitoring points when the background type of the environment to be monitored is pre-construction environmental background monitoring, to obtain first environmental radiation gamma dose rate monitoring data; monitor the environmental radiation gamma dose rate at the monitoring points when the background type of the environment to be monitored is pre-decommissioning and remediation environmental background monitoring, to obtain second original environmental radiation gamma dose rate monitoring data; obtain a second preset background value range; compare the second original environmental radiation gamma dose rate monitoring data with the second preset background value range, and remove data in the second original environmental radiation gamma dose rate monitoring data that are greater than the second preset background value range, to obtain second environmental radiation gamma dose rate monitoring data; and use the first environmental radiation gamma dose rate monitoring data and the second environmental radiation gamma dose rate monitoring data as environmental radiation gamma dose rate monitoring data.

[0157] Furthermore, to achieve the above objectives, the present invention also proposes a device for determining the background value of radium-226. The device for determining the background value of radium-226 includes: a memory, a processor, and a program for determining the background value of radium-226 stored in the memory and executable on the processor. The program for determining the background value of radium-226 is configured to implement the steps of the method for determining the background value of radium-226 as described above.

[0158] Since the background value determination device for radium-226 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0159] Furthermore, this embodiment of the invention also proposes a storage medium storing a background value determination program for radium-226. When the background value determination program for radium-226 is executed by a processor, it implements the steps of the background value determination method for radium-226 as described above.

[0160] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0161] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0162] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0163] In addition, for technical details not described in detail in this embodiment, please refer to the method for determining the background value of radium-226 provided in any embodiment of the present invention, which will not be repeated here.

[0164] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0165] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0166] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0167] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for determining the background value of radium-226, characterized in that, The method for determining the background value of radium-226 includes: Acquire the locations of environmental radiation gamma dose rate monitoring points; The ambient radiation gamma dose rate is monitored at the aforementioned ambient radiation gamma dose rate monitoring points to obtain ambient radiation gamma dose rate monitoring data. Outlier processing was performed on the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate. Radium-226 monitoring points were determined based on the qualified monitoring points of the environmental radiation gamma dose rate, and samples were taken based on the radium-226 monitoring points. The activity concentration of radium-226 was monitored based on the radium-226 sampling results, and the activity concentration monitoring data of radium-226 was obtained. Outlier processing was performed on the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

2. The method for determining the background value of radium-226 as described in claim 1, characterized in that, The outlier processing of the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil includes: The radium-226 monitoring values ​​at the corresponding monitoring points are obtained based on the activity concentration monitoring data of radium-226. Obtain the first preset background value range; The radium-226 monitoring values ​​that are greater than the first preset background value range are removed to obtain the reference radium-226 monitoring values; Outlier processing was performed on the reference radium-226 monitoring values, and the processed data were statistically analyzed to obtain the mean and standard deviation. The background value of radium-226 in the soil was determined based on the mean and standard deviation.

3. The method for determining the background value of radium-226 as described in claim 2, characterized in that, The process of processing the reference radium-226 monitoring values ​​for outlier values, performing statistical analysis on the processed data to obtain the mean and standard deviation, and determining the background value of radium-226 in the soil based on the mean and standard deviation includes: The reference radium-226 monitoring values ​​are arranged in ascending order to obtain the sorted reference radium-226 monitoring values. Calculate the reference radium-226 monitoring average value and the reference radium-226 monitoring standard deviation based on the aforementioned reference radium-226 monitoring values; The deviation value in the arranged reference radium-226 monitoring values ​​is calculated based on the average value of the reference radium-226 monitoring and the arranged reference radium-226 monitoring values. Calculate the comparison value based on the deviation value; Obtain the number of detection level α values ​​and reference radium-226 monitoring values; Calculate the confidence probability value based on the detection level α value; A critical value is obtained based on the confidence probability value and the number of reference radium-226 monitoring values; Compare the critical value with the comparison value; When the comparison value is greater than the critical value, the reference radium-226 monitoring value corresponding to the comparison value is removed from the arranged reference radium-226 monitoring values ​​to obtain the removed radium-226 monitoring value. The removed radium-226 monitoring value is then subjected to mathematical statistics to obtain the average value and standard deviation. The background value of radium-226 in the soil is determined based on the average value and the standard deviation.

4. The method for determining the background value of radium-226 as described in claim 1, characterized in that, The determination of radium-226 monitoring points based on the qualified monitoring points of the environmental radiation gamma dose rate includes: Obtain the preset layout rules and monitoring value specifications; The location of the points is obtained based on the preset point layout rules; The number of samples is determined based on the monitored values; The radium-226 monitoring points are determined by the location of the sampling points and the number of samples taken at qualified monitoring points of the ambient radiation gamma dose rate.

5. The method for determining the background value of radium-226 as described in claim 1, characterized in that, The locations for obtaining the ambient radiation gamma dose rate monitoring points include: Obtain the background type of the environment to be monitored, the monitoring range, and the deployment rules; When the background environment to be monitored is pre-construction background monitoring, points are placed according to the monitoring range and the point placement rules. Points are placed in a fan-shaped area formed by the first distance, the second distance, the third distance and the preset number of azimuth angles, with one point placed in each sector, to obtain the first point location and the first point quantity. Within the factory boundary, points are placed according to the preset number of points to obtain the second point location and the second number of points. The monitoring points for environmental radiation gamma dose rate are obtained based on the first location, the first number of locations, the second location, and the second number of locations.

6. The method for determining the background value of radium-226 as described in claim 1, characterized in that, The locations for obtaining the ambient radiation gamma dose rate monitoring points include: Obtain the background type and monitoring point layout rules of the environment to be monitored; When the background environment to be monitored is the background environment before decommissioning and remediation, data on uranium mining and metallurgical activities are acquired. The transfer trajectory of radioactive materials during uranium mining and metallurgical production was obtained based on the uranium mining and metallurgical activity data. The monitoring range of environmental radiation gamma dose rate is determined based on the transfer trajectory of radioactive materials during the uranium mining and metallurgical production process; Based on the environmental radiation gamma dose rate monitoring range and the specified point layout rules, monitoring points for environmental radiation gamma dose rate are determined.

7. The method for determining the background value of radium-226 as described in any one of claims 1 to 6, characterized in that, The monitoring of the environmental radiation gamma dose rate at the aforementioned environmental radiation gamma dose rate monitoring points to obtain environmental radiation gamma dose rate monitoring data includes: When the background type of the environment to be monitored is the pre-construction background monitoring, the environmental radiation γ dose rate is monitored through the monitoring points to obtain the first environmental radiation γ dose rate monitoring data. When the background type of the environment to be monitored is the background environment before decommissioning and remediation, the environmental radiation γ dose rate is monitored through the monitoring points to obtain the second original environmental radiation γ dose rate monitoring data. Obtain the second preset background value range; The second original environmental radiation γ dose rate monitoring data is compared with the second preset background value range, and the data in the second original environmental radiation γ dose rate monitoring data that are greater than the second preset background value range are removed to obtain the second environmental radiation γ dose rate monitoring data. The first environmental radiation gamma dose rate monitoring data and the second environmental radiation gamma dose rate monitoring data are used as environmental radiation gamma dose rate monitoring data.

8. A device for determining the background value of radium-226, characterized in that, The device for determining the background value of radium-226 includes: The acquisition module is used to acquire the locations of environmental radiation gamma dose rate monitoring points; The monitoring module is used to monitor the environmental radiation gamma dose rate through the environmental radiation gamma dose rate monitoring points and obtain environmental radiation gamma dose rate monitoring data. The processing module is used to process outliers in the environmental radiation gamma dose rate monitoring data to obtain qualified monitoring points for environmental radiation gamma dose rate. The determination module is used to determine the radium-226 monitoring points based on the qualified monitoring points of the ambient radiation γ dose rate, and to perform sampling based on the radium-226 monitoring points; The monitoring module is also used to monitor the activity concentration of radium-226 based on the radium-226 sampling results, and obtain radium-226 activity concentration monitoring data; The processing module is used to process outlier values ​​in the activity concentration monitoring data of radium-226 to determine the background value of radium-226 in the soil.

9. A device for determining the background value of radium-226, characterized in that, The device for determining the background value of radium-226 includes: a memory, a processor, and a program for determining the background value of radium-226 stored in the memory and executable on the processor, wherein the program for determining the background value of radium-226 is configured to implement the method for determining the background value of radium-226 as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a background value determination program for radium-226, which, when executed by a processor, implements the background value determination method for radium-226 as described in any one of claims 1 to 7.

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