A method and system for estimating residents' dietary consumption for radiation dose evaluation

Abstract

The present invention relates to a method and system for estimating dietary consumption of residents for radiation dose evaluation, which belongs to the field of nuclear facility radiation impact evaluation. Based on the environmental release characteristics of airborne effluents of nuclear facilities and the environmental characteristics of the plant site, the scope of the dietary consumption survey of residents and the number of survey samples are determined through evaluation, and the dietary consumption of the public around the nuclear facility site is characterized by a probability theory statistical method with standardized electronic questionnaire input, so as to finally achieve the technical effect of truly reflecting the dietary habits of residents around the nuclear facility and meeting the needs of the radiation dose evaluation of the public at the nuclear facility. The method and system for estimating dietary consumption of residents for radiation dose evaluation disclosed by the present invention can reasonably determine the number of dietary survey samples of residents and the statistical criteria of consumption, characterize the dietary consumption of the public around the nuclear facility site, and make the public radiation dose evaluation result more truly reflect the radiation impact of the operation of the nuclear facility.

Description

Technical Field

[0001] The invention belongs to the field of nuclear facility radiation impact assessment, and in particular relates to a resident dietary consumption estimation method and a system thereof for radiation dose assessment. Background Art

[0002] Public radiation dose assessment of nuclear facilities refers to the quantitative estimation of the radiation impact of radionuclides released into the environment on the surrounding public, including several steps: source release prediction, environmental transport and transfer simulation, and dose estimation.

[0003] Ingestion is one of the main pathways of radiation environmental impact of nuclear facilities. Estimating the radiation impact caused by the intake of radionuclides by humans through food or drinking water is the radiation environmental impact of nuclear facilities. How to obtain representative dietary consumption of the public around nuclear facilities is the key to estimating the ingestion dose of the public around nuclear facilities. At present, the distribution of questionnaires in the dietary consumption survey of the public around nuclear facilities is relatively random, with poor pertinence and low efficiency. The data statistics are also based on the engineering practice experience of the investigators, with great uncertainty and human factors, which may affect the accuracy and feasibility of the public dose evaluation results.

[0004] In order to further improve the efficiency of the survey and the quality of survey data, standardize the statistical analysis of survey data, and establish a resident dietary consumption survey and evaluation system for public radiation dose evaluation, it is very necessary to provide technical support for the public dose evaluation of nuclear facilities in my country. Summary of the invention

[0005] In view of the defects existing in the prior art, the object of the present invention is to provide a method and system for estimating residents' dietary consumption for radiation dose evaluation.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] In a first aspect, a method for estimating dietary consumption of residents for radiation dose assessment comprises the following steps:

[0008] S1. Obtain environmental characteristic data of nuclear facility sites and environmental release characteristic data of airborne effluents under nuclear facility operation conditions and convert them into a format recognizable by the atmospheric diffusion model;

[0009] S2. Inputting the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, and determining the implementation scope and sample number of the dietary consumption survey of residents at the nuclear facility site according to the output parameter values;

[0010] S3. Distribute the residents’ dietary consumption questionnaire to the determined survey subjects and obtain the corresponding survey data;

[0011] S4. Analyze the survey data on dietary consumption of residents and calculate the representative dietary consumption of residents at the nuclear facility site based on the data.

[0012] Furthermore, the plant site environmental characteristic data includes plant site population distribution and population characteristic data as well as meteorological data.

[0013] Furthermore, the population distribution and population characteristics data of the factory site include the population distribution of different age groups at different locations and distances within the evaluation scope, as well as the occupation, nationality and lifestyle characteristics data of the public within the evaluation scope;

[0014] The plant site characteristic meteorological data is the hourly ground meteorological data of a representative meteorological station for one consecutive year in the past three years, and the plant site characteristic meteorological data includes meteorological data and site information;

[0015] The meteorological data include wind direction, wind speed, precipitation, temperature, humidity, total cloud, low cloud and site pressure data;

[0016] The site information includes latitude and longitude, observation altitude and site number;

[0017] The airborne effluent environmental release characteristic data include the types of polluting nuclides and their environmental release rates, the total annual release amount, the height of the chimney at the emission outlet, the inner diameter of the chimney, the outlet flue gas rate, the height of adjacent buildings and the relative position coordinates, where the relative position is the relative position of the adjacent buildings relative to the emission outlet.

[0018] Further, step S2 includes sub-steps:

[0019] S201, inputting the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, so as to output the environmental migration of radionuclides according to the input data;

[0020] S202. Determine the scope of implementation of the on-site survey on dietary consumption of residents around the nuclear facility by analyzing the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and the possible environmental impacts; determine the number of samples for the dietary consumption survey of residents to meet the needs of estimating the dietary consumption of residents.

[0021] Furthermore, the survey data in step S3 includes the daily consumption of various types of food by the respondents and the origin of the food.

[0022] Further, step S3 includes counting the number of valid information on residents' consumption of each type of food, the average value of each survey classification group, and the standard deviation δ.

[0023] Further, step S3 includes estimating the 95% confidence interval of each type of food consumption M of different groups of residents based on the dietary consumption survey data of residents around nuclear facilities obtained through investigation.

[0024] Furthermore, the estimated range of 95% confidence level for each type of food consumption M of different groups of residents is estimated by the following formula: Where n is the number of samples.

[0025] Furthermore, the upper limit of the interval is adopted The consumption of various types of food by residents for public radiation dose assessment at nuclear facilities.

[0026] In a second aspect, a resident dietary consumption estimation system for radiation dose evaluation is used to implement a resident dietary consumption estimation method for radiation dose evaluation described in the first aspect and any optional implementation manner thereof, the system comprising a plant site environmental characteristic data acquisition module, a survey implementation scope and sample number determination module, a survey data acquisition module, a resident dietary consumption data calculation module, and an information management module;

[0027] The plant site environment characteristic data acquisition module is used to acquire the nuclear facility plant site environment characteristic data and the airborne effluent environment release characteristic data under the nuclear facility operation conditions and convert them into a format recognizable by the atmospheric diffusion model;

[0028] The survey implementation scope and sample number determination module is used to input the acquired nuclear facility site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operation conditions into the atmospheric migration and diffusion model, and determine the implementation scope and sample number of the dietary consumption survey of residents at the nuclear facility site according to the output parameters;

[0029] The survey data acquisition module is used to issue a resident dietary consumption questionnaire to the determined survey subjects and obtain corresponding survey data;

[0030] The residents' dietary consumption data calculation module is used to analyze the acquired residents' dietary consumption survey data and calculate the representative residents' dietary consumption at the nuclear facility site based on the data;

[0031] The information management module is used to manage the input data, intermediate data and output data in the plant site environment characteristic data acquisition module, the survey implementation scope and sample number determination module, the survey data acquisition module and the resident dietary consumption data calculation module, including the storage, output and query of various data.

[0032] The effect of the present invention is that the method and system for estimating dietary consumption of residents for radiation dose evaluation disclosed in the present invention are based on the environmental release characteristics and environmental characteristics of airborne effluents at the nuclear facility site, and the scope and objects of the residents' dietary consumption survey are determined through evaluation. The representative annual dietary consumption of residents at the site is provided through standardized electronic questionnaire input and probability statistical methods, thereby improving the efficiency and accuracy of the survey and evaluation and meeting the needs of public radiation dose evaluation at nuclear facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The structure block diagram of a resident dietary consumption estimation system for radiation dose evaluation is shown in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Embodiment 1

[0036] The embodiment of the present invention provides a method for investigating dietary consumption of residents for public radiation dose evaluation, the method comprising the following steps:

[0037] S1. Obtain the environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and convert them into a format recognizable by the atmospheric diffusion model.

[0038] The site environmental characteristic data include the site population distribution and population characteristic data (including age, occupation, etc.) and meteorological data.

[0039] The population distribution and population characteristic data of the factory site include the population distribution of different age groups at different locations and distances within the evaluation scope, as well as characteristic data such as occupation, nationality, and lifestyle of the public within the evaluation scope.

[0040] The characteristic meteorological data of the plant site are the hourly ground meteorological data of the representative meteorological station for one consecutive year in the past three years, including meteorological data such as wind direction, wind speed, precipitation, temperature, humidity, total cloud, low cloud, station pressure, and station information such as longitude and latitude, observation altitude, and station number.

[0041] The environmental release characteristic data of airborne effluents under the operating conditions of nuclear facilities include the types of polluting nuclides and their environmental release rates, the total annual release amount, the height of the chimney at the emission outlet, the inner diameter of the chimney, the outlet flue gas rate, the height of adjacent buildings and the relative position coordinates. The relative position refers to the relative position of the adjacent buildings relative to the emission outlet.

[0042] The system module converts the acquired nuclear facility site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operating conditions into a format recognizable by the atmospheric diffusion model.

[0043] S2. Input the acquired environmental characteristic data of nuclear facility sites and the environmental release characteristic data of airborne effluents under nuclear facility operation conditions into the atmospheric migration and diffusion model, and determine the implementation scope and sample number of the dietary consumption survey of residents at nuclear facility sites based on the output parameters.

[0044] The acquired nuclear facility site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operating conditions are input into the atmospheric migration and diffusion model, and the atmospheric migration and diffusion model outputs the environmental migration characteristics of radionuclides based on the input data.

[0045] By analyzing the environmental release characteristic data of airborne effluents under the operating conditions of nuclear facilities and the possible environmental impacts, the implementation scope of the on-site survey on dietary consumption of residents around nuclear facilities is determined; by analyzing the living habits information (occupation, age, behavior pattern, etc.) of residents within the survey scope, the grouping and classification principles of the residents' dietary consumption survey are determined according to the needs of environmental impact assessment; in order to meet the needs of estimating residents' dietary consumption, the number of samples for the residents' dietary consumption survey is determined.

[0046] S3. Distribute the residents’ dietary consumption questionnaire to the determined survey subjects and obtain the corresponding survey data.

[0047] Select survey subjects who meet the requirements to conduct a dietary consumption survey on residents and obtain corresponding survey data.

[0048] The survey data includes the respondents’ daily consumption of various types of food, the origin of the food, etc.

[0049] S4. Analyze the survey data on dietary consumption of residents and calculate the representative dietary consumption of residents at the nuclear facility site based on the data.

[0050] The obtained data on residents' dietary consumption were analyzed, including statistics on the age, occupation, and lifestyle characteristics of different groups of residents, the number of valid information items on each type of food consumption by different groups of residents, and the mean and standard deviation of each survey classification group.

[0051] The International Commission on Radiological Research (ICRP) report No. 101 has clearly stated that in deterministic evaluation (currently adopted in my country), due to the influence of uncertainty, when there is a lack of specific local characteristic data, it is a prudent approach to use 95% of the distribution range of lifestyle data as the annual intake.

[0052] Using probability statistical methods, based on the dietary consumption data of residents living around nuclear facilities obtained from the survey, the estimated range of 95% confidence levels for the annual consumption of various types of food for different groups of residents was estimated, and the upper limit of the interval was used as the public dietary consumption for the public radiation dose evaluation of nuclear facilities. The results of various types of dietary consumption of residents obtained in this way were summarized as the annual dietary consumption of residents used in the public radiation dose evaluation of nuclear facilities.

[0053] Since the dietary consumption data M of the same type of residents around nuclear facilities show a normal distribution law, based on the dietary consumption survey data of residents around nuclear facilities obtained from the survey, the estimated range of the 95% confidence interval of each type of food consumption M of different groups of residents is: Where n is the number of samples, the upper limit of the interval is used As the consumption of various types of food by residents for the public radiation dose assessment of nuclear facilities, the dietary consumption results obtained by statistics of various types of residents are summarized as the representative dietary consumption of residents for the public radiation dose assessment of nuclear facilities.

[0054] Embodiment 2

[0055] like Figure 1 As shown, an embodiment of the present invention discloses a resident dietary consumption estimation system for radiation dose evaluation, which is used to implement a resident dietary consumption estimation method for radiation dose evaluation disclosed in embodiment one.

[0056] This embodiment provides a resident dietary consumption survey system 100 for public radiation dose assessment, wherein the system 100 includes a plant site environmental characteristic data acquisition module 101, a survey implementation scope and sample number determination module 102, a survey data acquisition module 103, a resident dietary consumption data calculation module 104, and an information management module 105.

[0057] The plant site environmental characteristic data acquisition module 101 is used to acquire the nuclear facility plant site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operation conditions and convert them into a format recognizable by the atmospheric diffusion model.

[0058] The site environmental characteristic data include the site population distribution and population characteristic data (including age, occupation, etc.) and meteorological data.

[0059] The population distribution and population characteristic data of the factory site include the population distribution of different age groups at different locations and distances within the evaluation scope, as well as characteristic data such as occupation, nationality, and lifestyle of the public within the evaluation scope.

[0060] The characteristic meteorological data of the plant site are the hourly ground meteorological data of the representative meteorological station for one consecutive year in the past three years, including meteorological data such as wind direction, wind speed, precipitation, temperature, humidity, total cloud, low cloud, station pressure, and station information such as longitude and latitude, observation altitude, and station number.

[0061] The environmental release characteristic data of airborne effluents include the types of polluting nuclides and their environmental release rates, the total annual release amount, the height of the chimney at the emission outlet, the inner diameter of the chimney, the outlet flue gas rate, the height of adjacent buildings and the relative position coordinates. The relative position refers to the relative position of the adjacent buildings relative to the emission outlet.

[0062] The module 102 for determining the scope of implementation of the survey and the number of samples is used to input the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, and determine the scope of implementation of the dietary consumption survey of residents at the nuclear facility site and the number of samples according to the output parameter values.

[0063] The module 102 for determining the scope of investigation and the number of samples includes an atmospheric migration and diffusion model, which inputs the acquired nuclear facility site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operation conditions into the atmospheric migration and diffusion model. The atmospheric migration and diffusion model calculates and outputs the environmental migration characteristics of radioactive nuclides through the input data.

[0064] By analyzing the environmental release characteristic data of airborne effluents under the operating conditions of nuclear facilities and the possible environmental impacts, the implementation scope of the on-site survey on dietary consumption of residents around nuclear facilities is determined; by analyzing the living habits information (occupation, age, behavior pattern, etc.) of residents within the survey scope, the grouping and classification principles of the residents' dietary consumption survey are determined according to the needs of environmental impact assessment; in order to meet the needs of estimating residents' dietary consumption, the number of samples for the residents' dietary consumption survey is determined.

[0065] The survey data acquisition module 103 is used to distribute the residents' dietary consumption questionnaire to the determined survey subjects and obtain the corresponding survey data.

[0066] The survey data acquisition module 103 selects survey subjects who meet the requirements to conduct a resident dietary consumption survey and obtains corresponding survey data.

[0067] The survey data includes the respondents’ daily consumption of various types of food, the origin of the food, etc.

[0068] The survey data acquisition module 103 includes a questionnaire input module 103a, which includes client software, a hardware environment and configuration requirements setting unit, and a questionnaire management unit. Among them, the minimum hardware configuration requirements of the client are CPU, I3 / 1600; memory, 2G; hard disk, 100G, network card, 10 / 100M; the client software requirement is Android system, version 6.0 or above.

[0069] The questionnaire management unit is used for client login, information management of qualified respondents, and survey information filling specifications.

[0070] The residents' dietary consumption data calculation module 104 is used to analyze the obtained residents' dietary consumption survey data, and calculate the representative residents' dietary consumption of the nuclear facility site accordingly.

[0071] The residents' dietary consumption data calculation module 104 includes a residents' dietary consumption database 104a and a data analysis unit 104b.

[0072] The resident dietary consumption database 104a is used to store basic information of the resident dietary consumption survey, survey data and statistical analysis results of the survey data.

[0073] Among them, the basic information of residents’ dietary consumption dietary survey includes the dietary consumption survey method adopted, survey time, survey object information, food composition, etc.

[0074] The survey data includes the respondents’ daily consumption of various types of food, the origin of the food, etc.

[0075] The statistical analysis results of the survey data include the number of valid information items on residents' consumption of various types of food, the average value of each survey classification group, Standard deviation δ, estimated results of annual dietary consumption M of representative residents at nuclear facility sites.

[0076] The data analysis unit 104b is used to analyze the obtained residents' dietary consumption survey data, including the number of valid information items on residents' consumption of various types of food, the average value of each survey classification group, and the number of valid information items on residents' consumption of various types of food. The representative annual dietary consumption M of residents at the nuclear facility site is estimated based on the standard deviation δ, which provides the representative dietary consumption of residents at the site for use in the radiation dose assessment of nuclear facilities.

[0077] The International Commission on Radiological Research (ICRP) report No. 101 has clearly stated that in deterministic evaluation (currently adopted in my country), due to the influence of uncertainty, when there is a lack of specific local characteristic data, it is a prudent approach to use 95% of the distribution range of lifestyle data as the annual intake.

[0078] Using probability statistical methods, based on the dietary consumption data of residents living around nuclear facilities obtained from the survey, the estimated range of 95% confidence levels for the annual consumption of various types of food for different groups of residents was estimated, and the upper limit of the interval was used as the public dietary consumption for the public radiation dose evaluation of nuclear facilities. The results of various types of dietary consumption of residents obtained in this way were summarized as the annual dietary consumption of residents used in the public radiation dose evaluation of nuclear facilities.

[0079] Since the dietary consumption data M of residents around nuclear facilities presents a normal distribution law, based on the dietary consumption survey data of residents around nuclear facilities obtained from the survey, the estimated range of the 95% confidence interval of each type of food consumption M of different groups of residents is: Where n is the number of samples, the upper limit of the interval is used As the consumption of various types of food by residents for the public radiation dose assessment of nuclear facilities, the dietary consumption results obtained by statistics of various types of residents are summarized as the representative dietary consumption of residents for the public radiation dose assessment of nuclear facilities.

[0080] The information management module 105 is used to manage the input data, intermediate data and output data in the plant site environmental characteristic data acquisition module 101, the survey implementation scope and sample number determination module 102, the survey data acquisition module 103, and the resident dietary consumption data calculation module 104, including the storage, output and query of various data.

[0081] It can be seen from the above embodiments that the method and system for estimating residents' dietary consumption for radiation dose evaluation disclosed in the present invention are based on the environmental release characteristics and environmental characteristics of airborne effluents at the nuclear facility site, and the scope and objects of the residents' dietary consumption survey are determined through evaluation. The representative annual dietary consumption of residents at the site is provided through standardized electronic questionnaire input and probability statistical methods, thereby meeting the needs of public radiation dose evaluation of nuclear facilities.

[0082] The method and system described in the present invention are not limited to the embodiments described in the specific implementation manner. Those skilled in the art may derive other implementation manners based on the technical solution of the present invention, which also fall within the technical innovation scope of the present invention.

Claims

1. A method for estimating dietary consumption of residents for radiation dose assessment, the method comprising the following steps: S1. Obtain the environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and convert them into a format recognizable by the atmospheric transport and diffusion model; S2. Input the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, so as to output the environmental migration characteristic parameters of radionuclides according to the input data, and determine the implementation scope and sample number of the dietary consumption survey of residents at the nuclear facility site by analyzing the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and possible environmental impacts according to the output parameter values; S3. Distribute the residents’ dietary consumption questionnaire to the determined survey subjects and obtain the corresponding survey data; S4. Analyze the obtained survey data on dietary consumption of residents and calculate the dietary consumption of residents representative of the nuclear facility site based on the data; The plant site environmental characteristic data include the plant site population distribution and population characteristic data and the plant site characteristic meteorological data; the plant site population distribution and population characteristic data include the population distribution of different directions and distances and different age groups within the evaluation range, and the occupation, nationality and lifestyle characteristic data of the public within the evaluation range; the survey data in step S3 include the age, occupation and lifestyle characteristic data of the surveyed subjects, the daily consumption of various types of food by the surveyed subjects and the origin of the food; The plant site characteristic meteorological data is the hourly ground meteorological data of a representative meteorological station for one consecutive year in the past three years, and the plant site characteristic meteorological data includes meteorological data and site information; The meteorological data include wind direction, wind speed, precipitation, temperature, humidity, total cloud, low cloud and site pressure data; The site information includes latitude and longitude, observation altitude and site number; The airborne effluent environmental release characteristic data include the types of polluting nuclides and their environmental release rates, the total annual release amount, the height of the chimney at the emission outlet, the inner diameter of the chimney, the outlet flue gas rate, the height of adjacent buildings and the relative position coordinates, where the relative position is the relative position of the adjacent buildings relative to the emission outlet.

2. A method for estimating residents' dietary consumption for radiation dose evaluation according to claim 1, characterized in that: Step S2 includes the following sub-steps: S201, inputting the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, so as to output the environmental migration characteristics of radionuclides according to the input data; S202. Determine the scope of implementation of the on-site survey on dietary consumption of residents around the nuclear facility by analyzing the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and the possible environmental impacts; determine the number of samples for the dietary consumption survey of residents to meet the needs of estimating the dietary consumption of residents.

3. A method for estimating residents' dietary consumption for radiation dose evaluation according to claim 1, characterized in that: Step S3 includes counting the number of valid information on residents' consumption of each type of food, the average value of each survey classification group and the standard deviation δ.

4. A method for estimating residents' dietary consumption for radiation dose evaluation according to claim 3, characterized in that: Step S3 includes estimating the 95% confidence interval of each type of food consumption M of different groups of residents based on the dietary consumption survey data of residents around nuclear facilities obtained through investigation.

5. A method for estimating residents' dietary consumption for radiation dose evaluation according to claim 4, characterized in that: The estimated range of 95% confidence level for each type of food consumption M of different groups of residents is estimated by the following formula: Where n is the number of samples.

6. A method for estimating residents' dietary consumption for radiation dose evaluation according to claim 5, characterized in that: Use the upper limit of the interval The consumption of various types of food by residents for public radiation dose assessment at nuclear facilities.

7. A resident dietary consumption estimation system for radiation dose evaluation, used to implement a resident dietary consumption estimation method for radiation dose evaluation as claimed in any one of claims 1 to 6, characterized in that: The system includes a plant site environmental characteristic data acquisition module, a survey implementation scope and sample number determination module, a survey data acquisition module, a resident dietary consumption data calculation module, and an information management module; The plant site environmental characteristic data acquisition module is used to acquire the nuclear facility site environmental characteristic data and the airborne effluent environmental release characteristic data under the nuclear facility operation condition and convert them into a format recognizable by the atmospheric diffusion model; the plant site environmental characteristic data includes the plant site population distribution and population characteristic data and meteorological data; the plant site population distribution and population characteristic data include the population distribution of different locations and distances and different age groups within the evaluation scope, and the occupation, nationality and lifestyle characteristic data of the public within the evaluation scope; The survey implementation scope and sample number determination module is used to input the acquired environmental characteristic data of the nuclear facility site and the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility into the atmospheric migration and diffusion model, so as to output the environmental migration characteristic parameters of radionuclides according to the input data, and determine the implementation scope and sample number of the dietary consumption survey of residents at the nuclear facility site by analyzing the environmental release characteristic data of airborne effluents under the operating conditions of the nuclear facility and possible environmental impacts according to the output parameter values; The survey data acquisition module is used to issue a resident dietary consumption questionnaire to the determined survey subjects and obtain corresponding survey data; the survey data includes the age, occupation and lifestyle characteristics of the survey subjects, the daily consumption of various types of food by the survey subjects and the origin of the food; The residents' dietary consumption data calculation module is used to analyze the acquired residents' dietary consumption survey data and calculate the representative residents' dietary consumption at the nuclear facility site based on the data; The information management module is used to manage the input data, intermediate data and output data in the plant site environment characteristic data acquisition module, the survey implementation scope and sample number determination module, the survey data acquisition module and the resident dietary consumption data calculation module, including the storage, output and query of various data.

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