Method, device and medium for environmental impact assessment of radioactive wastewater discharge of nuclear medicine department

Abstract

The application discloses a kind of nuclear medicine department radioactive sewage discharge environmental impact assessment method, equipment and medium, it is related to radiation environmental impact assessment technical field, solve the current radiation environmental impact assessment technology cannot provide the influence of different discharge routes to public dose Technical problems, its technical scheme main point is to the condition that radioactive nuclide-containing wastewater is discharged into urban sewage pipe network, the public dose after radioactive nuclide-containing wastewater is discharged into landscape water and receiving water body is calculated respectively, and the deposition concentration on the surface of vegetation soil and the deposition concentration on the surface of crop soil are redefined, improve the accuracy of public dose estimation, can simply and accurately evaluate the radiation dose caused to public.

Description

Technical Field

[0001] This application relates to the field of radiation environmental impact assessment technology, and in particular to a method, equipment and medium for assessing the environmental impact of radioactive wastewater discharge from nuclear medicine departments. Background Technology

[0002] In recent years, with the rapid development of nuclear medicine, the use of radioactive medical isotopes has increased year by year. Wastewater containing radioactive nuclides generated by nuclear medicine departments is discharged into urban sewage networks after treatment in decay ponds. Even after treatment at sewage treatment plants, the wastewater may still contain radioactive nuclides. Different sewage treatment plants have different discharge methods, requiring calculations of the public dose under different discharge scenarios. Currently, environmental impact assessment methods exist to evaluate the public dose after direct discharge into receiving water bodies, but these methods are not precise enough and lack systematic analysis of sewage pipeline discharge scenarios. Therefore, existing assessment methods cannot clearly determine the resulting public dose. Summary of the Invention

[0003] This application provides a method, equipment, and medium for environmental impact assessment of radioactive wastewater discharge from nuclear medicine departments. Its technical purpose is to comprehensively consider the scenarios of treated wastewater entering landscape water use and receiving water body use, improve the accuracy of public doses, and conduct corresponding evaluations.

[0004] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0005] An environmental impact assessment method for radioactive wastewater discharge from a nuclear medicine department includes:

[0006] The activity concentration of radionuclides in wastewater containing radionuclides discharged to a sewage treatment plant is calculated.

[0007] When wastewater containing radionuclides is used for landscaping, the first public dose caused by the discharge of wastewater containing radionuclides is calculated; wherein, the first public dose is the sum of the annual external radiation dose caused by surface deposition of radionuclides to the public, the annual external radiation dose caused by air immersion of radionuclides to the public due to resuspension of radionuclides, and the annual internal radiation dose caused by inhalation of radionuclides to the public due to resuspension of radionuclides.

[0008] When wastewater containing radionuclides is discharged into a receiving water body, the second public dose caused by the discharge of wastewater containing radionuclides is calculated; wherein, the second public dose is the sum of the annual dose caused by drinking water, the annual dose caused by eating fish, and the annual dose caused by irrigating agricultural land with treated wastewater;

[0009] The larger of the first and second public doses was selected as the final evaluation result to assess the environmental impact.

[0010] Preferably, the radionuclide activity concentration of the radionuclide-containing wastewater is expressed as:

[0011] ;

[0012] in, This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This indicates the activity concentration of radionuclides emitted from the decay pool in the nuclear medicine department, expressed in Bq / m³. 3 ; This indicates the annual emission volume of the decay pool in the nuclear medicine department, expressed in cubic meters (m³). 3 ; This indicates the annual treatment capacity of the wastewater treatment plant to which the wastewater containing radionuclides enters after being discharged into the urban sewage system, expressed in m³. 3 .

[0013] Preferably, the first public dose is expressed as:

[0014] ;

[0015] ;

[0016] ;

[0017] ;

[0018] in, This indicates the first public dose caused by the discharge of radioactive wastewater containing radionuclides used for landscaping purposes; This represents the annual external radiation dose from surface deposition caused to the public by the radioactive nuclides after the wastewater containing radionuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the concentration of sediment deposited on the surface of vegetation soil caused by irrigation water, expressed in Bq / m³. 2 ; This represents the external radiation dose conversion factor for surface sediments, expressed in Sv / a per Bq / m². 2 ; This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the average irrigation rate during the vegetation growing season, in meters. 3 / (m 2 ·a); This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a). The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 .

[0019] Preferably, the and stated They are represented as follows:

[0020] ;

[0021] ;

[0022] ;

[0023] in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 P represents the effective surface density of the soil, in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 ; This represents the annual air intake, expressed in m³. 3 / a; This represents the external exposure conversion factor for air immersion dose, measured in Sv / a per Bq / m². 3 ; This represents the inhaled dose conversion factor, measured in Sv / Bq.

[0024] Preferably, the second public dose is expressed as:

[0025] ;

[0026] ;

[0027] ;

[0028] in, This indicates the second public dose resulting from the discharge of radionuclide-containing wastewater into the receiving water body; This represents the annual dose caused by drinking water, expressed in Sv / a. This indicates the annual dose caused by ingesting fish, expressed in Sv / a. The annual dose caused by irrigating agricultural land with treated wastewater is expressed in Sv / a. This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the annual water consumption, measured in cubic meters (m³). 3 / y; The ingestion dose conversion factor is expressed in Sv / Bq; BF represents the bioaccumulation factor in fish, expressed in Bq / kg. 鲜 per Bq / m 3 ; This indicates the annual intake of fish, expressed in kg. 鲜 / y;

[0029] ;

[0030] ;

[0031] ;

[0032] ;

[0033] in, This represents the annual external radiation dose from surface deposition caused to the public by the deposition of radioactive nuclides on the ground after wastewater containing radioactive nuclides is used for farmland irrigation. The unit is Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the internal radiation received by the public after ingesting wastewater containing radionuclides that has been used for farmland irrigation, resulting in the accumulation of radionuclides in plants. The unit is Sv / a. This indicates the internal radiation received by the public after consuming dairy products from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the internal radiation received by the public after consuming meat from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the concentration of soil deposits caused by irrigation water on the crop soil surface, expressed in Bq / m³. 2 ; This indicates the annual amount of sunshine received by farmers during cultivation; This represents the average irrigation rate during the crop growing season, expressed in meters. 3 / (m 2 a); The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 ; This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a).

[0034] ;

[0035] ;

[0036] ;

[0037] in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 ; This indicates the inhaled dose conversion factor, measured in Sv / Bq. The effective surface density of soil is expressed in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 .

[0038] Preferably, Represented as:

[0039] ;

[0040] in, This indicates the concentration factor of radionuclides absorbed from the soil by the edible parts of crops, measured in Bq / kg. 鲜 per Bq / kg 干 ; This indicates the time from when crops are harvested to when they are consumed, measured in years (a). Represents the decay factor of a nuclide, with units of a. -1 ; This indicates the annual intake of crops, expressed in kg. 鲜 / a; This represents the ingested dose conversion factor, measured in Sv / Bq.

[0041] Preferably, the Represented as:

[0042] ;

[0043] ;

[0044] in, This indicates the activity concentration of radionuclides in animal feed, expressed in Bq / kg. 干 ; This indicates the concentration factor of radionuclides absorbed by feed from the soil, measured in Bq / kg. 干 per Bq / kg 干 ; This indicates the proportion of fresh feed consumed by animals; This indicates the time between feed harvesting and feed consumption, expressed in years (a). This indicates the fraction of radionuclides ingested by an animal per liter of milk under equilibrium conditions, expressed in days / L. This indicates the amount of feed consumed by dairy animals, expressed in kg. 干 / day; This represents the average time from collection to consumption of fresh milk, expressed in years (a). This indicates the annual intake of dairy products, expressed in L / a.

[0045] Preferably, the Represented as:

[0046] ;

[0047] in, This indicates the fraction of radionuclides ingested by an animal per kilogram of meat under equilibrium conditions, expressed in days / kg. 鲜 ; This indicates the amount of feed consumed by meat animals, expressed in kg. 干 / day; This represents the average time from harvesting to consumption of fresh meat, expressed in years (a). This indicates the annual intake of meat, expressed in kg. 鲜 / a.

[0048] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements a method for environmental impact assessment of radioactive wastewater discharge from a nuclear medicine department.

[0049] A computer storage medium storing a computer program, which, when executed by a processor, implements a method for assessing the environmental impact of radioactive wastewater discharge from a nuclear medicine department.

[0050] The above technical solution can achieve at least some of the following technical effects: The environmental impact assessment method for radioactive wastewater discharge from nuclear medicine departments described in this application systematically sorts out the public exposure pathways for the discharge of radionuclide-containing wastewater into urban sewage pipe networks, calculates the public dose after the radionuclide-containing wastewater is used for landscaping and after it is discharged into receiving water bodies, and fully considers the public dose calculation methods for each exposure pathway; and redefines the deposition concentration on the surface of vegetation soil and the deposition concentration on the surface of crop soil, improving the accuracy of public dose estimation, and enabling a simple and accurate assessment of the radiation dose caused to the public. Attached Figure Description

[0051] Figure 1 This is a flowchart of the environmental impact assessment method for the discharge of radioactive wastewater from the nuclear medicine department as described in this application. Detailed Implementation

[0052] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0053] To clearly demonstrate the process and optimization effect of the method described in this application, this application first assumes a scenario of radioactive wastewater discharge from a nuclear medicine department. This application assumes that two hospitals in a medium-to-large city both have nuclear medicine departments, and their radioactive wastewater discharges into the same municipal wastewater treatment plant. A medium-to-large wastewater treatment plant is selected as the object for wastewater discharge volume calculation. This scenario represents a highly probable evaluation scenario in the future development of nuclear medicine. This application conservatively assumes that all radionuclides remain in the wastewater discharged from the wastewater treatment plant. Based on this, the environmental impact assessment method for radioactive wastewater discharge from a nuclear medicine department described in this application includes:

[0054] 100: Calculate the activity concentration of radionuclides in wastewater containing radionuclides discharged to a sewage treatment plant.

[0055] Preferably, the radionuclide activity concentration of the radionuclide-containing wastewater is expressed as:

[0056] ;

[0057] in, This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This indicates the activity concentration of radionuclides emitted from the decay pool in the nuclear medicine department, expressed in Bq / m³. 3 ; This indicates the annual emission volume of the decay pool in the nuclear medicine department, expressed in cubic meters (m³). 3 ; This indicates the annual treatment capacity of the wastewater treatment plant to which the wastewater containing radionuclides enters after being discharged into the urban sewage system, expressed in m³. 3.

[0058] Specifically, in this application case, it is assumed that the activity concentration of radionuclide I-131 discharged from the decay pool in the nuclear medicine department is 10,000 Bq / m³. 3 The annual discharge volume of the decay pool in the nuclear medicine department is 1000 m³. 3 The wastewater treatment plant has an annual treatment capacity of 3.27E+08 m³. 3 The calculated activity concentration in the wastewater from the wastewater treatment plant was 3.06E-02 Bq / m³. 3 .

[0059] 101: When wastewater containing radionuclides is used for landscaping, the first public dose caused by the discharge of wastewater containing radionuclides shall be calculated; wherein, the first public dose is the sum of the annual external radiation dose caused by surface deposition of radionuclides to the public, the annual external radiation dose caused by air immersion of radionuclides to the public due to resuspension of radionuclides, and the annual internal radiation dose caused by inhalation of radionuclides to the public due to resuspension of radionuclides.

[0060] Preferably, the main pathways through which landscape water use causes radiation exposure to the public are the external radiation dose received by the public around the landscape and the inhaled internal radiation dose. Conservatively assuming that the public is near landscape water use throughout the year, the first public dose is expressed as:

[0061] ;

[0062] ;

[0063] ;

[0064] ;

[0065] in, This indicates the first public dose caused by the discharge of radioactive wastewater containing radionuclides used for landscaping purposes; This represents the annual external radiation dose from surface deposition caused to the public by the radioactive nuclides after the wastewater containing radionuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the concentration of sediment deposited on the surface of vegetation soil caused by irrigation water, expressed in Bq / m³. 2 ; This represents the external radiation dose conversion factor for surface sediments, expressed in Sv / a per Bq / m².2 ; This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the average irrigation rate during the vegetation growing season, in meters. 3 / (m 2 ·a); This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a). The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 .

[0066] Preferably, the and stated They are represented as follows:

[0067] ;

[0068] ;

[0069] ;

[0070] in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 P represents the effective surface density of the soil, in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 ; This represents the annual air intake, expressed in m³. 3 / a; This represents the external exposure conversion factor for air immersion dose, measured in Sv / a per Bq / m². 3 ; This represents the inhaled dose conversion factor, measured in Sv / Bq.

[0071] 102: When radionuclide-containing wastewater is discharged into the receiving water body, the second public dose caused by the discharge of radionuclide-containing wastewater shall be calculated; wherein, the second public dose is the sum of the annual dose caused by drinking water, the annual dose caused by eating fish, and the annual dose caused by irrigating agricultural land with treated wastewater.

[0072] Specifically, in the case scenario of this application, it is conservatively assumed that the activity concentration of radionuclides in the water body is equal to the activity concentration at the discharge point. That is, dilution in the water body is ignored, and the public's drinking water, fish ingestion, and the external radiation from surface deposition, internal radiation from resuspension and inhalation, and internal radiation from ingestion of animals and plants caused by the use of receiving water to irrigate farmland are considered.

[0073] Preferably, the second public dose is expressed as:

[0074] ;

[0075] ;

[0076] ;

[0077] in, This indicates the second public dose resulting from the discharge of radionuclide-containing wastewater into the receiving water body; This represents the annual dose caused by drinking water, expressed in Sv / a. This indicates the annual dose caused by ingesting fish, expressed in Sv / a. The annual dose caused by irrigating agricultural land with treated wastewater is expressed in Sv / a. This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the annual water consumption, measured in cubic meters (m³). 3 / y; The ingestion dose conversion factor is expressed in Sv / Bq; BF represents the bioaccumulation factor in fish, expressed in Bq / kg. 鲜 per Bq / m 3 ; This indicates the annual intake of fish, expressed in kg. 鲜 / y;

[0078] ;

[0079] ;

[0080] ;

[0081] ;

[0082] in, This represents the annual external radiation dose from surface deposition caused to the public by the deposition of radioactive nuclides on the ground after wastewater containing radioactive nuclides is used for farmland irrigation. The unit is Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the internal radiation received by the public after ingesting wastewater containing radionuclides that has been used for farmland irrigation, resulting in the accumulation of radionuclides in plants. The unit is Sv / a. This indicates the internal radiation received by the public after consuming dairy products from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the internal radiation received by the public after consuming meat from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the concentration of soil deposits caused by irrigation water on the crop soil surface, expressed in Bq / m³. 2 ; This indicates the annual amount of sunshine received by farmers during cultivation; This represents the average irrigation rate during the crop growing season, expressed in meters. 3 / (m 2 a); The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 ; This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a).

[0083] ;

[0084] ;

[0085] ;

[0086] in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 ; This indicates the inhaled dose conversion factor, measured in Sv / Bq. The effective surface density of soil is expressed in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 .

[0087] Preferably, Represented as:

[0088] ;

[0089] in, This indicates the concentration factor of radionuclides absorbed from the soil by the edible parts of crops, measured in Bq / kg. 鲜 per Bq / kg 干 ; This indicates the time from when crops are harvested to when they are consumed, measured in years (a). Represents the decay factor of a nuclide, with units of a. -1 ; This indicates the annual intake of crops, expressed in kg. 鲜 / a; This represents the ingested dose conversion factor, measured in Sv / Bq.

[0090] Preferably, the Represented as:

[0091] ;

[0092] ;

[0093] in, This indicates the activity concentration of radionuclides in animal feed, expressed in Bq / kg. 干 ; This indicates the concentration factor of radionuclides absorbed by feed from the soil, measured in Bq / kg. 干 per Bq / kg 干 ; This indicates the proportion of fresh feed consumed by animals; This indicates the time between feed harvesting and feed consumption, expressed in years (a). This indicates the fraction of radionuclides ingested by an animal per liter of milk under equilibrium conditions, expressed in days / L. This indicates the amount of feed consumed by dairy animals, expressed in kg. 干 / day; This represents the average time from collection to consumption of fresh milk, expressed in years (a). This indicates the annual intake of dairy products, expressed in L / a.

[0094] Preferably, the Represented as:

[0095] ;

[0096] in, This indicates the fraction of radionuclides ingested by an animal per kilogram of meat under equilibrium conditions, expressed in days / kg. 鲜 ; This indicates the amount of feed consumed by meat animals, expressed in kg. 干 / day; This represents the average time from harvesting to consumption of fresh meat, expressed in years (a). This indicates the annual intake of meat, expressed in kg. 鲜 / a.

[0097] Specifically, in steps 101 and 102 above, the relevant parameters of the radionuclide I-131 used are shown in Table 1, and other general evaluation parameters are shown in Table 2. Each evaluation parameter can be adjusted according to the specific object to better reflect the real-world scenario.

[0098] Table 1. Nuclide-related parameter values ​​in this case.

[0099]

[0100] Table 2. Other common parameter values ​​in this case.

[0101]

[0102] 103: The larger of the first and second public doses is selected as the final evaluation result to assess the environmental impact.

[0103] Specifically, based on the evaluation process of steps 101 and 102, the dose calculation results of this application case are shown in Table 3.

[0104] Table 3 Dosage calculation results for this case

[0105]

[0106] Analysis of the embodiments in this application shows that, in this embodiment, the scenario where radionuclide-containing wastewater is discharged into a sewage pipe has the greatest impact on public dose when it is discharged into a receiving water body. The dose calculation result for the receiving water body in this embodiment is 1.21E-09 Sv / a, which is taken as the final public dose result. In other situations, after radionuclide-containing wastewater is discharged into a sewage pipe, the public dose can be obtained quickly and accurately using the method described in this application to assess the environmental impact.

[0107] The above are exemplary embodiments of this application, and the scope of protection of this application is defined by the claims and their equivalents.

Claims

1. A method for environmental impact assessment of radioactive wastewater discharge from a nuclear medicine department, characterized in that, include: The activity concentration of radionuclides in wastewater containing radionuclides discharged to a sewage treatment plant is calculated. When wastewater containing radionuclides is used for landscaping, the first public dose caused by the discharge of wastewater containing radionuclides is calculated; wherein, the first public dose is the sum of the annual external radiation dose caused by surface deposition of radionuclides to the public, the annual external radiation dose caused by air immersion of radionuclides to the public due to resuspension of radionuclides, and the annual internal radiation dose caused by inhalation of radionuclides to the public due to resuspension of radionuclides. When wastewater containing radionuclides is discharged into a receiving water body, the second public dose caused by the discharge of wastewater containing radionuclides is calculated; wherein, the second public dose is the sum of the annual dose caused by drinking water, the annual dose caused by eating fish, and the annual dose caused by irrigating agricultural land with treated wastewater; The larger of the first and second public doses was selected as the final evaluation result to assess the environmental impact.

2. The method for environmental impact assessment of radioactive wastewater discharge as described in claim 1, characterized in that, The radionuclide activity concentration of the wastewater containing radionuclides is expressed as follows: ； in, This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This indicates the activity concentration of radionuclides emitted from the decay pool in the nuclear medicine department, expressed in Bq / m³. 3 ; This indicates the annual emission volume of the decay pool in the nuclear medicine department, expressed in cubic meters (m³). 3 ; This indicates the annual treatment capacity of the wastewater treatment plant to which the wastewater containing radionuclides enters after being discharged into the urban sewage system, expressed in m³. 3 .

3. The method for environmental impact assessment of radioactive wastewater discharge as described in claim 1, characterized in that, The first public dose is expressed as: ； ； ； ； in, This indicates the first public dose caused by the discharge of radioactive wastewater containing radionuclides used for landscaping purposes; This indicates the annual external radiation dose from surface deposition caused to the public by the radioactive nuclides after the wastewater containing radionuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for landscaping, expressed in Sv / a. This indicates the concentration of sediment deposited on the surface of vegetation soil caused by irrigation water, expressed in Bq / m³. 2 ; This represents the external radiation dose conversion factor for surface sediments, expressed in Sv / a per Bq / m². 2 ; This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the average irrigation rate during the vegetation growing season, in meters. 3 / (m 2 ·a); This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a). The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 .

4. The environmental impact assessment method for radioactive wastewater discharge as described in claim 3, characterized in that, The and stated They are represented as follows: ； ； ； in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 P represents the effective surface density of the soil, in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 ; This represents the annual air intake, expressed in m³. 3 / a; This represents the external irradiation conversion factor for air immersion dose, measured in Sv / aper Bq / m. 3 ; This represents the inhaled dose conversion factor, measured in Sv / Bq.

5. The method for environmental impact assessment of radioactive wastewater discharge as described in claim 1, characterized in that, The second public dose is expressed as: ； ； ； in, This indicates the second public dose resulting from the discharge of radionuclide-containing wastewater into the receiving water body; This represents the annual dose caused by drinking water, expressed in Sv / a. This indicates the annual dose caused by ingesting fish, expressed in Sv / a. The annual dose caused by irrigating agricultural land with treated wastewater is expressed in Sv / a. This indicates the activity concentration of radionuclides in wastewater from wastewater treatment plants, expressed in Bq / m³. 3 ; This represents the annual water consumption, measured in cubic meters (m³). 3 / y; The ingestion dose conversion factor is expressed in Sv / Bq; BF represents the bioaccumulation factor in fish, expressed in Bq / kg. 鲜 per Bq / m 3 ; This indicates the annual intake of fish, expressed in kg. 鲜 / y; ； ； ； ； in, This represents the annual external radiation dose from surface deposition caused to the public by the deposition of radioactive nuclides on the ground after wastewater containing radioactive nuclides is used for farmland irrigation. The unit is Sv / a. This indicates the annual dose of airborne external radiation to the public caused by the resuspension of radioactive nuclides after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the annual dose of internal radiation from the resuspension of radioactive nuclides caused to the public after the wastewater containing radioactive nuclides is used for farmland irrigation, expressed in Sv / a. This indicates the internal radiation received by the public after ingesting wastewater containing radionuclides that has been used for farmland irrigation, resulting in the accumulation of radionuclides in plants. The unit is Sv / a. This indicates the internal radiation received by the public after consuming dairy products from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the internal radiation received by the public after consuming meat from wastewater containing radionuclides that has been used for farmland irrigation, and the radionuclides are transferred through the food chain. The unit is Sv / a. This indicates the concentration of soil deposits caused by irrigation water on the crop soil surface, expressed in Bq / m³. 2 ; This indicates the annual amount of sunshine received by farmers during cultivation; This represents the average irrigation rate during the crop growing season, expressed in meters. 3 / (m 2 a); The overall decay rate of a radionuclide is expressed in a 'a' unit. -1 ; Represents the decay factor of a nuclide, with units of a. -1 ; This represents the rate constant for the elimination of nuclides other than decay, expressed in a (a) units. -1 ; This indicates the cumulative time of radioactive nuclides on the soil surface, measured in years (a). ； ； ； in, This indicates the concentration of radionuclides in the air due to resuspension of radionuclides, expressed in Bq / m³. 3 ; This indicates the inhaled dose conversion factor, measured in Sv / Bq. The effective surface density of soil is expressed in kg / m³. 2 ; This indicates the concentration of suspended particulate matter in the air, expressed in kg / m³. 3 .

6. The method for environmental impact assessment of radioactive wastewater discharge as described in claim 5, characterized in that, Represented as: ； in, This indicates the concentration factor of radionuclides absorbed from the soil by the edible parts of crops, measured in Bq / kg. 鲜 per Bq / kg 干 ; This indicates the time from when crops are harvested to when they are consumed, measured in years (a). Represents the decay factor of a nuclide, with units of a. -1 ; This indicates the annual intake of crops, expressed in kg. 鲜 / a; This represents the ingested dose conversion factor, measured in Sv / Bq.

7. The environmental impact assessment method for radioactive wastewater discharge as described in claim 6, characterized in that, The Represented as: ； ； in, This indicates the activity concentration of radionuclides in animal feed, expressed in Bq / kg. 干 ; This indicates the concentration factor of radionuclides absorbed by feed from the soil, measured in Bq / kg. 干 per Bq / kg 干 ; This indicates the proportion of fresh feed consumed by animals; This indicates the time between feed harvesting and feed consumption, expressed in years (a). This indicates the fraction of radionuclides ingested by an animal per liter of milk under equilibrium conditions, expressed in days / L. This indicates the amount of feed consumed by dairy animals, expressed in kg. 干 / day; This represents the average time from collection to consumption of fresh milk, expressed in years (a). This indicates the annual intake of dairy products, expressed in L / a.

8. The method for environmental impact assessment of radioactive wastewater discharge as described in claim 7, characterized in that, The Represented as: ； in, This indicates the fraction of radionuclides ingested by an animal per kilogram of meat under equilibrium conditions, expressed in days / kg. 鲜 ; This indicates the amount of feed consumed by meat animals, expressed in kg. 干 / day; This represents the average time from harvesting to consumption of fresh meat, expressed in years (a). This indicates the annual intake of meat, expressed in kg. 鲜 / a.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 8.

10. A computer storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 8.

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