CN101726748B - Method for displaying evaluation data of nuclear radiation aftermath - Google Patents
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Abstract
The invention discloses a method for displaying the evaluation data of a nuclear radiation aftermath. A radioactive release source item is analyzed and calculated according to the state of the power plant of a nuclear power station, an accident aftermath which is possibly generated after an accident occurs to the nuclear power station is forecasted and calculated according to a quick evaluation mode, a single-module mode and a fine evaluation mode, and the calculated aftermath evaluation result is written into a text file; then, these text data are respectively classified according to three modes of the quick evaluation mode, the single-module mode and the fine evaluation mode, are written on a corresponding grid chart layer of a selected mode by selecting and switching at least one mode in the three modes and are represented in the form of arrowheads with different colors and/or changes. The invention combines the parameter information of the geography, the population, the weather and the like around the nuclear power station and intuitively reflects the aftermath which is possibly caused after the accident occurs to the nuclear power station.
Description
Technical Field
The invention relates to an emergency accident consequence evaluation method, in particular to a method for displaying nuclear radiation consequence evaluation data.
Background
Along with the rapid development of the nuclear energy and nuclear technology application in China, at present, 11 nuclear power units are put into operation in China, 17 civil researches on in-service operation are piled, and nuclear facilities matched with nuclear power are in a construction peak. Nuclear energy occupies an increasingly important position in the economic and energy production of China, and the task of nuclear safety and radiation environment safety management is increasingly heavy. Therefore, the emergency management of the nuclear accident is enhanced, and the emergency situation and related information of the nuclear accident are mastered timely, accurately and comprehensively so as to quickly and effectively organize and coordinate required response actions and meet the urgent requirement of reducing the accident consequence as much as possible.
The nuclear radiation consequence evaluation data display system can display the radiation consequence prediction result and the protection action information in the early stage of the accident under the condition of a nuclear accident, and provides a statistical query function. The conventional nuclear power station nuclear radiation consequence evaluation data display system can predict and evaluate accident consequences, so that rapid and effective measures are taken to avoid or reduce accident disasters. The output result of the nuclear accident consequence prediction and evaluation decision system is a large number of TXT text files, the file contents are large number of dosage concentration data, the file contents are not visual, the analysis is difficult, and the decision maker is not favorable for making an emergency decision quickly.
A rapid evaluation system of a gulf nuclear power station is based on a simple Gaussian plume correction mode considering the topographic deflection of a gulf under different wind directions, realizes the operation of a menu and a dialog box under an ArcGIS platform through the integration on the ArcGIS platform, and finally displays the calculation result on the platform.
However, the functions of the rapid evaluation system for the gulf are relatively simple, rapid evaluation calculation is performed only on the nuclear power station of the gulf, and only atmospheric diffusion, dosage and intervention actions can be displayed. Wherein, the atmospheric diffusion is mainly used for displaying three types of air time integral concentration, ground dry deposition concentration and ground wet deposition concentration of the selected nuclide during calculation; dose is shown for both organ effective and thyroid inhaled dose results; the intervention action is used for displaying a dismissal area, a hidden area and a deterministic effect area; the display mode is that the numerical value is represented by gradient colors on 41 multiplied by 41 grids around the nuclear power station, and the display system can only display the geographic information and accident consequence information around a certain nuclear power station; only the data is displayed in a grid graph mode, the effect is not vivid, and the display speed is low; the visual display of wind field data, wind speed, wind direction and the like around the power station is lacked; there is a lack of dynamic display of meteorological data and radiometric monitoring data around the power station.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for displaying nuclear radiation consequence evaluation data, which combines the geographic, population, weather and other parameter information around a nuclear power station and expresses nuclear radiation in the form of arrows with different colors or dynamic changes, thereby vividly and intuitively reflecting the consequences possibly caused after the nuclear power station has an accident and rapidly making protective measures.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for displaying nuclear radiation consequence evaluation data is characterized in that: analyzing and calculating a radioactive release source item according to the power plant state of the nuclear power plant, predicting and calculating accident consequences which are possibly generated after the nuclear power plant has an accident according to a quick evaluation mode, a single module mode and a fine evaluation mode, and writing the calculated consequence evaluation result into a text file; and classifying the text data according to a quick evaluation mode, a single module mode and a fine evaluation mode respectively, writing the data on a grid layer corresponding to the mode by selecting and switching at least one mode, and expressing the data in the form of arrows with different colors and/or changes, thereby reflecting possible consequences after the nuclear power station has an accident.
The rapid evaluation mode is as follows: and calculating values of effective dose, thyroid dose, smoke cloud irradiation dose, ground irradiation dose, inhalation dose and Cs-137 deposition amount around the nuclear power station, outputting the values to files according to two data distribution forms of 36 multiplied by 6 fan-shaped grids and 31 multiplied by 31 square grids, and writing each dose data into two files according to two distribution forms.
The fine evaluation mode and the single module mode are as follows: the data calculated by the wind field calculation module, the diffusion and dosage module, the protection action module and the decision optimization module are distributed in a 41X 41 square grid mode with the nuclear power station as the center, the grid spacing of the 41X 41 square grid is at least three, the four calculation modules run independently in a single module mode, and the four modules run sequentially in a fine evaluation mode.
The result evaluation data display adopting the fine evaluation mode and the single module mode specifically comprises the following steps: firstly, a wind field calculation module is used, the wind field of an evaluation area is subjected to interpolation calculation according to weather forecast data provided by weather monitoring and the requirement of accident consequence evaluation, and a wind speed U direction component, a wind speed V direction component, stability and rainfall intensity are calculated; the diffusion and dosage module analyzes and calculates advection transmission, diffusion and deposition of each smoke group according to the local region meteorological parameters obtained by the wind field calculation module, and calculates the concentration of nuclides in near-ground air caused by the smoke groups and the deposited nuclides, the time integral concentration of the nuclides in the air, ground pollution, gamma radiation dosage/dosage rate of smoke cloud, ground gamma radiation dosage/dosage rate and inhaled internal irradiation dosage/dosage rate; then, the protection action module estimates the dose which can be avoided under the alternative protection action according to the current and future radioactive release and space-time distribution conditions provided by the diffusion and dose module and relevant parameters of environmental and economic conditions, and estimates the cost of the protection action, thereby quantitatively estimating the advantages and the disadvantages of various protection action combinations and providing necessary support information for the emergency decision process; and finally, the decision optimization module adopts a multi-attribute utility ordering decision model to perform decision analysis on the protection measures and give priority ordering of the selectable protection measures.
The wind field computing module outputs a group of files, including a uniform meteorological file and 144 time steps of wind field files represented by a wind speed component U, V; the diffusion and dosage module carries out atmospheric diffusion forecasting calculation 48 hours after the start of accident release by using wind field forecasting data 48 hours, the output result is the concentration value of the dosage of various nuclides or the dosage absorbed by human organs, and 821 data files are provided.
The wind field calculation module dynamically displays meteorological data on a geographic information system by using arrows with direction changes and different lengths so as to represent the wind direction and the wind speed around the nuclear power station; the diffusion and dose module displays the concentration data in different colors by magnitude on the geographic information system.
And the layer displayed by the nuclear radiation consequence evaluation data is a layer formed by combining nuclear radiation diffusion information after an accident with the geographical information of the nuclear power station in which the accident occurs, and the geographical information of the nuclear power station in which the accident occurs is called from a plurality of geographical information distribution layers of the nuclear power station.
The writing of the data to the grid layer corresponding to the three modes of the fast evaluation mode, the single module mode and the fine evaluation mode specifically comprises the following steps: (1) generating a grid layer; (2) adding attribute fields to the grids; wherein the fixed field value is input once and is the basic geographic information; the variable field value is used for storing output data of nuclear accident consequence prediction and evaluation decision, and dynamically displaying meteorological data and radiation monitoring data around the nuclear power station in real time after a nuclear accident; (3) reading all data files output by a nuclear accident consequence prediction and evaluation decision system into a grid layer, (4) displaying concentration data in a variable field value by different colors according to magnitude; the wind field data is displayed by arrows with direction and length changes.
The data is displayed on the grid layer by adopting two display modes of grid and/or grid, the data grid display mode is to write the numerical value into one field of the planar grid layer and display all the numerical values in a grading mode by using a gradient color, the data grid display mode is to write the numerical value into one field of the point grid layer and generate a grid layer with a finer grid by using an interpolation method, and all the numerical values are displayed in a grading mode by using the gradient color.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
Analyzing and calculating a radioactive release source item according to the state of a power plant of the nuclear power station, predicting and calculating accident consequences which are possibly generated after the nuclear power station has an accident according to a quick evaluation mode, a single module mode and a fine evaluation mode, and writing the calculated consequence evaluation result into a text file; and classifying the text data according to a quick evaluation mode, a single module mode and a fine evaluation mode respectively, writing the data on a grid layer corresponding to the mode by selecting and switching at least one mode, and expressing the data in the form of arrows with different colors and/or changes, thereby reflecting possible consequences after the nuclear power station has an accident. The nuclear power station nuclear radiation protection method combines parameter information of geography, population, weather and the like around the nuclear power station, and expresses the nuclear radiation in the form of arrows with different colors and/or changes, so that the consequences possibly caused after the nuclear power station has an accident can be reflected visually and intuitively, and protective measures can be made quickly.
The invention displays the basic geographic information with complex source and large data volume in a grouping and classifying way; dynamically displaying ambient breath and radiation data information of the nuclear power station in real time; reasonably organizing and displaying consequence evaluation result data; the dose and other data are displayed by using a grid diagram, the effect is vivid, and the speed is high; dynamically displaying the wind speed and the wind direction around the nuclear power station; has extensibility and openness.
Detailed Description
The invention relates to a method for displaying nuclear radiation consequence evaluation data, which comprises the steps of analyzing and calculating a radioactive release source item according to the state of a power plant of a nuclear power station, predicting and calculating accident consequences which are possibly generated after an accident occurs in the nuclear power station according to a quick evaluation mode, a single module mode and a fine evaluation mode, and writing the calculated consequence evaluation result into a text file; and classifying the text data according to a quick evaluation mode, a single module mode and a fine evaluation mode respectively, writing the data on a grid layer corresponding to the mode by selecting and switching at least one mode, and expressing the data in the form of arrows with different colors and/or changes, thereby reflecting possible consequences after the nuclear power station has an accident.
According to the method, the meteorological information and the radiation monitoring information around the nuclear power station can be directly displayed in real time, the output data of the nuclear accident consequence prediction and evaluation system is displayed on a geographic information system, functions of statistics, query and the like are provided, and technical support is provided for emergency decision of a decision maker.
At present, three nuclear power bases are in operation in China, namely, Qin mountain, great Asia bay and Tianwan, wherein the Qin mountain nuclear power base comprises 5 nuclear power units in the first stage, the second stage and the third stage of the Qin mountain; the great Asia bay base comprises 4 nuclear power units in the great Asia bay and Ling Australia; the field bay base is provided with 2 nuclear power units.
The geographic information system adopted by the method of the invention requires to display the basic geographic information within the range of 80 kilometers of the radius of each base: the method comprises administrative divisions, nuclear power station factories and population information: using a reactor of a nuclear power station as a circle center, respectively using circles with the radiuses of 1, 2, 3, 5, 10, 20, 30, 40, 50, 60, 70 and 80 kilometers, and drawing 16 rays with the reactor as the circle center to obtain resident population and floating population data of 192 areas; and emergency specific information, including: emergency command department, emergency gathering point, evacuation route, evacuation arrangement point, fire brigade, medical center, first aid station, environmental radiation monitoring station, atmospheric radiation monitoring point, liquid discharge monitoring station, meteorological monitoring station, etc.
In consideration of the characteristics of complex source and large data volume of basic geographic information, the system stores a national map, a map of the Qinshan base, a map of the Daya bay base and a map of the Tianwan base as four subgroups in an MXD project file, and links for the maps of the Qinshan base, the Daya bay base and the Tianwan bay base are set on the national map; according to the method, map layers are classified and organized according to administrative divisions, plant area maps, traffic, residential points and emergency care points for each nuclear power base sub-group information, map layers are classified and organized according to provincial boundaries, county boundaries, rivers, roads, railways and provincial administrative centers for national maps, so that maps with different proportions can be displayed, and various map layer information can be clearly displayed through map layer grouping.
In order to meet different requirements of nuclear accident consequence prediction and evaluation decision, three evaluation modes are configured: a fast evaluation mode, a single module mode, a fine evaluation mode. Each mode is calculated according to a certain model, and then the calculation result is output to a large number of TXT files. Different from the fast evaluation mode, the single-module mode and the fine evaluation mode are divided into four calculation modules: wind field calculation, diffusion and dosage, protective action and decision optimization. In the single module mode, the four calculation modules can be operated independently, and in the fine evaluation mode, the four calculation modules are operated sequentially, and the calculation results are also output to the TXT file.
Fast evaluation mode: the values of effective dose, thyroid dose, smoke cloud irradiation dose, ground irradiation dose, inhalation dose and Cs-137 deposition amount around the nuclear power plant are calculated, the values are output to files according to two data distribution forms of 36 × 6 fan-shaped grids and 31 × 31 square grids, and each dose data is written into two files according to the two data distribution forms, so that 12 data files are output in total.
Fine evaluation mode and single module mode: the calculated data are distributed in the form of a 41 × 41 square grid centered on the nuclear power plant, and there are three grid intervals: 250 meters, 1 kilometer, 2 kilometers. Wherein,
1. the wind field calculation module is used for carrying out interpolation calculation on the wind field of the evaluation area according to the requirement of accident consequence evaluation on the basis of weather forecast data provided by a weather center, and calculating a wind speed U direction component, a wind speed V direction component, stability and rainfall intensity. Every ten minutes a time step, and therefore 48 hours are divided into 144 time steps, so the wind farm calculation module outputs a set of files including a uniform meteorological file and a wind farm file represented by the wind speed component U, V for 144 time steps.
2. The calculation model of the diffusion and dose module is a model for calculating the concentration and dose generated by the diffusion of the airborne substance by using the Lagrange mesoscale atmospheric diffusion plume mode. The core of this model is the simulation of continuous release by a series of boluses that are released sequentially. The amount of airborne substance dispensed into each bolus is equal to the release rate multiplied by the time interval of release of the bolus. In each time step, the module analyzes and calculates advection transmission, diffusion and deposition of each smoke cluster according to local meteorological parameters, and calculates the concentration of nuclides in near-ground air, the time integral concentration of the nuclides in the air, ground pollution, gamma radiation dose/dose rate of smoke cloud, ground gamma radiation dose/dose rate, inhaled internal irradiation dose/dose rate and the like caused by the smoke clusters and the deposited nuclides. The core idea is that 48-hour atmospheric dispersion forecast calculation is carried out after the accident release is started by using 48-hour wind field forecast data, the output result is the concentration value of the dosage of various nuclides or the dosage absorbed by human organs, and 821 data files are provided.
3. The protective action module estimates the dose which can be avoided under the conditions of concealment, evacuation and stable iodine piece distribution according to the current and future radioactive release and space-time distribution conditions provided by the diffusion and dosage module and relevant parameters of environmental and economic conditions, estimates the cost of the protective action, including the size of an affected area, the number of people and the like, thereby quantitatively estimating the advantages and the disadvantages of various protective actions, such as concealment, evacuation and stable iodine piece distribution combination, and providing necessary support information for an emergency decision-making process. The main task is to determine the areas where early emergency actions need to be taken, simulate these actions and calculate the individual dose with and without action, and output 45 files.
4. And the decision optimization module adopts a multi-attribute utility ordering decision model to perform decision analysis on the protective measures and gives priority ordering of the selectable protective measures.
The text data are classified according to a fast evaluation mode, a single module mode and a fine evaluation mode, and the data are written on a grid layer corresponding to the mode by selecting and switching at least one mode. Data are converted to graphs:
(1) generating a grid layer;
because the nuclear accident consequence prediction and evaluation decision-making system is different according to different calculation modes, the output data range is also different. Each nuclear power plant is therefore equipped with 5 sets of gridding layers, as follows:
36 × 6 sector: a6 km circular area is divided into 6 annular areas according to 1km, 1.5km, 2km, 3.5km, 5km and 6km by taking a nuclear power plant as a center, and each annular area is divided into 36 10-degree sectors. The data arrangement sequence is clockwise, from inside to outside, 5 degrees to 15 degrees are No. 1 data, 15 degrees to 25 degrees are No. 2 data … …, and the data are clockwise rotated for one circle to No. 36 and 355 degrees to 5 degrees. Then the outer layer area of No. 1 is No. 37, the data are arranged clockwise, and the like, and 216 data are obtained in total;
31 × 31 square: the nuclear power station is taken as a center, the data coverage area is 100km multiplied by 100km, and the grid spacing is 10/3 km. The data arrangement sequence is from bottom to top and from left to right: the lower left corner is data number 1, the data number 1 is arranged from left to right, 31 data numbers are arranged in each row, data number 32 … … is arranged above the data number 1 square grid, and the like, and 961 data are obtained in total;
41 × 41 — 1 square: the nuclear power plant was centered on a nuclear power plant with a grid spacing of 250m, located at (21, 21) grid points. The data arrangement sequence is from bottom to top and from left to right: the lower left corner is data No. 1, the data are arranged from left to right, 41 data are arranged in each row, data No. 42 … … is arranged above a data No. 1 square grid, and the like, and 1681 data are obtained in total;
41 × 41 — 2 square: the nuclear power station is used as a center, the grid interval is 1km, and the nuclear power station is located at (21, 21) grid points. The data arrangement sequence is from bottom to top and from left to right: the lower left corner is data No. 1, the data are arranged from left to right, 41 data are arranged in each row, data No. 42 … … is arranged above a data No. 1 square grid, and the like, and 1681 data are obtained in total;
41 × 41 — 3 square: the nuclear power plant is centered on the nuclear power plant, the grid spacing is 2km, and the nuclear power plant is located at (21, 21) grid points. The data arrangement sequence is from bottom to top and from left to right: the lower left corner is data number 1, arranged from left to right, 41 in each row, data number 42 … … above the data number 1 square, and so on, for a total of 1681 data.
And for 3 wind field layers: 41 × 41_1, 41 × 41_2, 41 × 41_3, which are arranged in a similar manner to the corresponding square layers, except that the wind field layers do not display a grid, but instead display arrows within the grid.
(2) Adding attribute fields to the grids;
the following table is a description of the attribute fields of each grid:
wherein the fixed field value of the attribute column label is input at one time and is basic geographic information; the field value marked as variable is used for storing output data of nuclear accident consequence prediction and evaluation decision, and dynamically displaying meteorological data and radiation monitoring data for monitoring environmental radiation monitoring stations, atmospheric radiation monitoring points, meteorological monitoring stations and the like around the nuclear power station after a nuclear accident in real time.
(3) Reading all data files output by the nuclear accident consequence prediction and evaluation decision system into a grid map layer, wherein effective dose, smoke cloud irradiation dose, ground irradiation dose, inhalation dose, thyroid dose, Cs _137 deposition dose, stability, rainfall, wind u component, wind v component, wind speed and angle are variable field values.
(4) Displaying the concentration data in the variable field value by different colors according to magnitude; the wind field data is displayed by arrows with direction and length changes.
The data is displayed on the grid layer by adopting two display modes of grid and/or grid, the data grid display mode is to write the numerical value into one field of the planar grid layer, all the numerical values are displayed in a grading way by using gradient colors, and the attribute information of population, residential points and the like of each grid can be displayed; the data grid display mode is to write the numerical value into one field of the dot-shaped grid layer, generate a grid layer with a finer grid by using an interpolation method, and display all the numerical values in a grading mode by using gradient colors, wherein the grid layer is not a vector diagram, has no attribute information such as population, resident points and the like, and displays data with variable attribute field values.
The wind field data output by the nuclear accident consequence prediction and evaluation decision has a wind speed U component and a wind speed V component, namely, the vector is decomposed to the X direction and the Y direction of a rectangular coordinate system. When the image is displayed on the layer, the U and V components are synthesized into an angle and a numerical value which are represented by arrows with direction and length changes.
Wherein, the specified wind speed is divided into six grades: less than or equal to 1 m/s; 1.1-3.0 m/s; 3.1-6.0 m/s; 6.1-10.0 m/s; 10.1-20.0 m/s; greater than or equal to 20 m/s;
the interval of values for the prescribed concentration and dose display is divided into:
1) air time integral concentration: 10E4Bq × s/m3-10E13Bq × s/m3 is divided into 9 intervals, each interval is of one order of magnitude, namely 10E4-10E5, 10E5-10E6 and the like; below 10E4Bq xs/m 3 the color was the same as background; all values above 10E13Bq xs/m 3 are in the same color;
2) the ground pollution concentration: 10E1Bq/m2-10E10Bq/m2 are divided into 9 intervals, each interval is an order of magnitude, and the range beyond the interval is similar to 1) treatment;
3) instantaneous concentration in air: 10E1Bq/m3-10E10Bq/m3 are divided into 9 intervals, each interval is an order of magnitude, and the range beyond the interval is similar to 1) treatment;
4) the effective dose is as follows: is divided into 10 sections of 10E-3-10E-2, 10E-2-10E-1, 10E-1-1, 1-5, 5-10, 10-20, 20-50, 50-100, 100 and more than 1000;
5) other organ doses: is divided into 10 sections of 10E-2-10E-1, 10E-1-1, 1-10, 10-50, 50-100, 100-200, 200-500, 500-1000, 10E3-10E4, which are more than 10E 4;
6) dose rate: 10E-4-10E2 is divided into 6 intervals, with all values greater than 10E2 being one interval.
Analyzing and calculating a radioactive release source item according to the state of a power plant of the nuclear power station, predicting and calculating accident consequences which are possibly generated after the nuclear power station has an accident according to a quick evaluation mode, a single module mode and a fine evaluation mode, and writing the calculated consequence evaluation result into a text file; and classifying the text data according to a quick evaluation mode, a single module mode and a fine evaluation mode respectively, writing the data on a grid layer corresponding to the mode by selecting and switching at least one mode, and expressing the data in the form of arrows with different colors and/or changes, thereby reflecting possible consequences after the nuclear power station has an accident. The nuclear power station nuclear radiation protection method combines parameter information of geography, population, weather and the like around the nuclear power station, and expresses the nuclear radiation in the form of arrows with different colors and/or changes, so that the consequences possibly caused after the nuclear power station has an accident can be reflected visually and intuitively, and protective measures can be made quickly.
The invention displays the basic geographic information with complex source and large data volume in a grouping and classifying way; dynamically displaying ambient breath and radiation data information of the nuclear power station in real time; reasonably organizing and displaying consequence evaluation result data; the dose and other data are displayed by using a grid diagram, the effect is vivid, and the speed is high; dynamically displaying the wind speed and the wind direction around the nuclear power station; has extensibility and openness.
Claims (6)
1. A method for displaying nuclear radiation consequence evaluation data is characterized in that: analyzing and calculating a radioactive release source item according to the power plant state of the nuclear power plant, predicting and calculating accident consequences which are possibly generated after the nuclear power plant has an accident according to a quick evaluation mode, a single module mode and a fine pricing mode, and writing the calculated consequence evaluation result into a text file; classifying the text data according to a quick evaluation mode, a single module mode and a fine evaluation mode respectively, writing the data on a grid layer corresponding to the mode by selecting and switching at least one mode, and expressing the data in the form of arrows with different colors and/or changes, so as to reflect possible consequences after the nuclear power station has an accident;
the rapid evaluation mode is as follows: calculating values of effective dose, thyroid dose, smoke cloud irradiation dose, ground irradiation dose, inhalation dose and Cs-137 deposition amount around the nuclear power station, outputting the values to files according to two data distribution forms of 36 multiplied by 6 fan-shaped grids and 31 multiplied by 31 square grids, and writing each dose data into two files according to the two data distribution forms;
the fine evaluation mode and the single module mode are as follows: the data calculated by the wind field calculation module, the diffusion and dosage module, the protection action module and the decision optimization module are distributed in the form of 41 × 41 square grids with the nuclear power station as the center, and the grid spacing of the 41 × 41 square grids is three: 250 meters, 1 kilometer and 2 kilometers, wherein the four calculation modules independently operate in a single module mode, and the four modules sequentially operate in a fine evaluation mode;
the wind field calculation module is used for carrying out interpolation calculation on a wind field of an evaluation area according to the requirement of accident consequence evaluation on the basis of weather forecast data provided by a weather center, and calculating a wind speed U direction component, a wind speed V direction component, stability and rainfall intensity;
the calculation model of the diffusion and dose module is a model for calculating the concentration and dose generated by the diffusion of the airborne substance by utilizing a Lagrange mesoscale atmospheric diffusion smoke mass mode, the core of the model is to simulate continuous release by a series of smoke masses released in sequence, the amount of the airborne substance distributed into each smoke mass is equal to the release rate multiplied by the release time interval of the smoke masses, the advection transmission, diffusion and deposition of each smoke mass are calculated according to the analysis of the meteorological parameters of a local area obtained by the wind field calculation module, and the concentration of nuclides in the near-ground air, the time integral concentration of the nuclides in the air, the ground pollution, the gamma radiation dose/dose rate of the smoke cloud, the gamma radiation dose/dose rate of the ground and the inhaled internal radiation dose/dose rate caused by the smoke masses and the deposited nuclides are calculated;
the protection action module estimates alternative protection actions according to the current and future radioactive release and space-time distribution conditions provided by the diffusion and dosage module and relevant parameters of environmental and economic conditions, and estimates the cost of the protection actions, including the size and the number of people in an affected area, so that various protection actions are quantitatively estimated and necessary support information is provided for an emergency decision process;
and the decision optimization module adopts a multi-attribute utility ordering decision model to perform decision analysis on the protective measures and gives priority ordering of the selectable protective measures.
2. The method for displaying nuclear radiation outcome evaluation data according to claim 1, wherein: the wind field computing module outputs a group of files, including a uniform meteorological file and 144 time steps of wind field files represented by a wind speed component U, V; the diffusion and dosage module carries out atmospheric diffusion forecasting calculation 48 hours after the start of accident release by using wind field forecasting data 48 hours, the output result is the concentration value of the dosage of various nuclides or the dosage absorbed by human organs, and 821 data files are provided.
3. The method for displaying nuclear radiation outcome evaluation data according to claim 1, wherein: the wind field calculation module dynamically displays meteorological data on a geographic information system by using arrows with direction changes and different lengths so as to represent the wind direction and the wind speed around the nuclear power station; the diffusion and dose module displays the concentration data in different colors by magnitude on the geographic information system.
4. The method for displaying nuclear radiation outcome evaluation data according to claim 1, wherein: and the grid layer displayed by the nuclear radiation consequence evaluation data is a layer formed by combining nuclear radiation diffusion information after an accident with the geographical information of the nuclear power station in which the accident occurs, and the geographical information of the nuclear power station in which the accident occurs is called from a plurality of geographical information distribution layers of the nuclear power station.
5. The method for displaying nuclear radiation outcome evaluation data according to claim 1, wherein: the writing of the data to the grid layer corresponding to the three modes of the fast evaluation mode, the single module mode and the fine evaluation mode specifically comprises the following steps: (1) generating a grid layer; (2) adding attribute fields to the grids; wherein the fixed field value is input once and is the basic geographic information; the variable field value is used for storing output data of nuclear accident consequence prediction and evaluation decision, and dynamically displaying meteorological data and radiation monitoring data around the nuclear power station in real time after a nuclear accident; (3) reading all data files output by a nuclear accident consequence prediction and evaluation decision system into a grid layer, (4) displaying concentration data in a variable field value by different colors according to magnitude; the wind field data is displayed by arrows with direction and length changes.
6. The method of claim 5, wherein the data for evaluating the nuclear radiation outcome comprises: the data is displayed on the grid layer by adopting a grid and/or grid display mode, the data grid display mode is to write numerical values into one field of a planar grid layer and display all the numerical values in a grading mode by using gradient colors, the data grid display mode is to write the numerical values into one field of a point grid layer and generate a grid layer with a finer grid by using an interpolation method, and all the numerical values are displayed in a grading mode by using the gradient colors.
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