Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a statistical analysis method and a statistical analysis system for nuclear facility environment monitoring data, which can complete the long-term change trend analysis of effluent and environment monitoring data, realize the long-term change rule analysis of historical data, and conveniently identify the change condition of the discharge outlet source item of each nuclear facility, the concentration enrichment condition of each environment monitoring and the overall environment quality current situation of the surrounding environment of a nuclear base.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a statistical analysis method for environmental monitoring data of a nuclear facility, the statistical analysis method comprising: establishing a nuclear facility surrounding environment monitoring data database, establishing a nuclear facility effluent monitoring data database and carrying out statistical analysis on data in the data database;
the method for establishing the monitoring data database of the surrounding environment of the nuclear facility comprises the following steps: establishing an environment basic information unit for collecting basic information data including an area where a nuclear facility is located, an environment functional area where a water body is received and the like, a radiation background investigation data unit for establishing radiation background investigation data of the area where the nuclear facility is located, an annual radiation environment monitoring data unit for establishing annual radiation environment monitoring data of the nuclear facility, and an environment quality standard limit value unit for establishing an environment quality standard limit value of the area where the nuclear facility is located;
the method for establishing the nuclear facility effluent monitoring data database comprises the following steps: establishing a regulation emission standard limit value unit for collecting emission limits of nuclides in national regulation/standard, a target value unit for establishing a management target value of a collection operation unit, an annual effluent emission data unit for establishing annual effluent emission data of a collection nuclear facility, and an emission basic information unit for establishing emission basic information including emission facility basic conditions, exhaust outlet basic information and the like;
the method for carrying out statistical analysis on the data in the library comprises the following steps: when the analysis is needed to be performed on certain data in the nuclear facility surrounding environment monitoring data database or the nuclear facility effluent monitoring data database, the data information can be automatically acquired, the statistical calculation analysis is performed through a corresponding calculation formula pre-stored in advance, the result of the statistical calculation analysis is displayed in a chart form, and the data exceeding the corresponding standard limit value can be independently marked.
Meanwhile, the scheme also provides a statistical analysis system according to the statistical analysis method of the nuclear facility environmental monitoring data, the statistical analysis system is a trend analysis module of built-in monitoring data of the nuclear facility environmental monitoring data statistical system, the trend analysis module of the monitoring data comprises an environmental monitoring database module, an effluent monitoring database module and a data analysis module, the data analysis module is used for calling and carrying out corresponding statistical analysis on data in the environmental monitoring database module and the effluent monitoring database module, the environmental monitoring database module comprises an environmental basic information unit comprising basic information data such as a nuclear facility area and an environmental functional area thereof, a water receiving body and the like, a radiation background investigation data unit for establishing radiation background investigation data of the area where the nuclear facility is located, an historical radiation environmental monitoring data unit for establishing historical radiation environmental protection limit value of the area where the nuclear facility is located, and an environmental quality standard limit value unit for establishing environmental quality standard limit value of the area where the nuclear facility is located, the effluent monitoring database module comprises an emission standard limit value unit comprising national regulation/standard of nuclide emission, an emission target value management unit for establishing a collection operation unit, an historical facility target value setting unit for establishing a collection operation unit, an emission basic information unit for establishing an emission basic information unit, and the emission basic information unit comprises emission basic information such as an emission information.
Further, the data analysis module comprises a trend analysis unit for trend analysis of time-based abscissa changes.
Further, the data analysis module comprises a formula calculation unit with a built-in background subtraction formula, a normalized emission amount calculation formula and a non-point source radon estimation formula.
Further, the data analysis module further comprises a labeling unit for counting emission deviation and abnormal point labeling of multiple groups of data.
Compared with the prior art, the beneficial technical effects that this scheme had are: the statistical analysis method and the statistical analysis system for the environmental monitoring data of the nuclear facility can be used for carrying out statistical analysis on the environmental monitoring data and the effluent monitoring data of the nuclear facility in the past year, and the development rule and the development trend of the data to be monitored are obtained on the basis of the statistical analysis, so that an analysis basis is provided for the situation that corresponding measures are needed to be taken, and meanwhile, the data to be known can be directly and intuitively checked, so that the statistical analysis method and the statistical analysis system are extremely convenient and simple.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The method and the system can complete the long-term change trend analysis of the effluent and the environment monitoring data, realize the long-term change rule analysis of the historical data, and conveniently identify the change condition of the discharge outlet item of each nuclear facility, the concentration enrichment condition of each environment monitoring and the overall environmental quality status quo of the surrounding environment of the nuclear base.
Firstly, the scheme provides a statistical analysis method for the environmental monitoring data of the nuclear facility, which comprises the following steps: establishing a nuclear facility surrounding environment monitoring data database, establishing a nuclear facility effluent monitoring data database and carrying out statistical analysis on data in the data database;
the method for establishing the monitoring data database of the surrounding environment of the nuclear facility comprises the following steps: establishing an environment basic information unit for collecting basic information data including an area where a nuclear facility is located, an environment functional area where a water body is received and the like, a radiation background investigation data unit for establishing radiation background investigation data of the area where the nuclear facility is located, an annual radiation environment monitoring data unit for establishing annual radiation environment monitoring data of the nuclear facility, and an environment quality standard limit value unit for establishing an environment quality standard limit value of the area where the nuclear facility is located;
the method for establishing the nuclear facility effluent monitoring data database comprises the following steps: establishing a regulation emission standard limit value unit for collecting emission limits of nuclides in national regulation/standard, a target value unit for establishing a management target value of a collection operation unit, an annual effluent emission data unit for establishing annual effluent emission data of a collection nuclear facility, and an emission basic information unit for establishing emission basic information including emission facility basic conditions, exhaust outlet basic information and the like;
the method for carrying out statistical analysis on the data in the library comprises the following steps: when the analysis is needed to be performed on certain data in the nuclear facility surrounding environment monitoring data database or the nuclear facility effluent monitoring data database, the data information can be automatically acquired, the statistical calculation analysis is performed through a corresponding calculation formula pre-stored in advance, the result of the statistical calculation analysis is displayed in a chart form, and the data exceeding the corresponding standard limit value can be independently marked.
For example, in practice, when the current environmental quality situation around the nuclear facilities needs to be analyzed, the analysis module with built-in monitoring data will call out the annual environmental monitoring data of the database, and complete the change curves with time on the abscissa and different nuclide concentrations on the ordinate, and when background deduction is needed for some natural nuclides, the background deduction is checked, and the monitoring data analysis module can automatically call out the radiation background data of the database, so as to complete the calculation work of deduction of the data concentration. In order to evaluate the overall environment quality condition of the area, environment basic information can be automatically called, the environment functional division of the area and the environment quality standard limit value executed by the area are obtained, the environment quality standard limit value of each pollutant is given on a trend chart, data comparison is carried out, data deviation is given, and standard exceeding data is marked.
When the long-term emission condition of a certain pollutant of a nuclear facility needs to be analyzed, a trend analysis module with built-in monitoring data calls out the annual effluent emission monitoring data of the pollutant at each emission port of the facility, finishes a change curve with time on the abscissa and nuclide emission quantity on the ordinate, and automatically calculates and obtains the total alpha and total beta release quantity and the release quantity of each nuclide of the facility according to the emission port information such as the exhaust quantity and the preset nuclide proportion. In order to analyze the operating conditions, all the discharge ports of the nuclear facility can be checked at one time, and the discharge data is counted. In addition, the emission of the pollutant can be compared with the standard of national emission, a built-in part calculation formula, such as a calculation formula of normalized emission of a nuclear power plant (the calculation method is to divide the annual emission of the effluent by the annual energy generation of the same period to obtain the normalized emission of the nuclide), the change curve of the normalized emission of the nuclide is realized, the standard comparison analysis of the standard deviation and the emission limit value is realized when the line is compared with the national standard emission limit value, the relation between the analysis data and the limit value is analyzed, and the standard exceeding data or the abnormal point is marked.
Referring to fig. 1, the present solution correspondingly provides a statistical analysis system for environmental monitoring data of a nuclear facility, where the statistical analysis system is a trend analysis module 1 with built-in monitoring data in the statistical system for environmental monitoring data of a nuclear facility, the trend analysis module 1 for monitoring data includes an environmental monitoring database module 2, an effluent monitoring database module 3, and a data analysis module 4, where the data analysis module 4 is configured to retrieve and perform corresponding statistical analysis on the data in the environmental monitoring database module 2 and the effluent monitoring database module 3, and the environmental monitoring database module 2 includes an environmental basic information unit 21 including basic information data such as a region where the nuclear facility is located and an environmental functional region thereof, a receiving water body, etc., a radiation background investigation data unit 22 for establishing radiation background investigation data of the region where the nuclear facility is located, an historical radiation environmental monitoring data unit 23 for establishing radiation environmental monitoring data of the nuclear facility, and an environmental quality standard limit unit 24 for establishing an environmental quality standard limit of the region where the nuclear facility is located; the effluent monitoring database module 3 includes a regulation emission standard limit value unit 31 including emission limits of nuclides in national regulation/standard, a target value unit 32 establishing a management target value of collection operation units, an annual effluent emission data unit 33 establishing annual effluent emission data of collection nuclear facilities, and an emission base information unit 34 establishing collection of emission base information including emission facility base conditions, exhaust outlet base information, and the like. The data analysis module 4 includes a trend analysis unit 41 for trend analysis with time as abscissa change, a formula calculation unit 42 for built-in background subtraction formula, normalized emission amount calculation formula and surface source radon estimation formula, and a labeling unit 43 for counting emission deviation and abnormal point labeling of multiple groups of data.
The following describes a statistical analysis system for environmental monitoring data of a nuclear facility in the present solution with reference to specific embodiments:
it is assumed that the emission standard is achieved in order to analyze whether the long-term emission of tritium in the radioactive gas carrying effluent of a heavy water reactor unit of a certain nuclear power plant meets the national regulation standard limit value.
First, the trend analysis module 1 of the monitoring data will invoke national regulations of the effluent monitoring database, emission limits of nuclides in standards, historical effluent emission data of nuclear facilities, emission base information. And (3) finishing nuclear power plant emission basic information screening, calling an emission port with tritium emission of the heavy water reactor unit, and acquiring the name, the operating condition, the generated energy, the name, the position, the air discharge quantity, the emission height, the emission time and the like of the emission unit. And (3) completing the screening of tritium emission data of the airborne effluent of all the discharge ports involved in the heavy water reactor unit. The built-in monitoring data analysis module 4 is used for calling a nuclear power plant effluent normalized emission amount calculation formula to complete tritium normalized emission amount calculation, obtaining tritium year normalized emission amount with time on the abscissa and nuclide tritium on the ordinate, forming a change curve of emission amount along with the years, calling a year emission amount limit value of a tritium heavy water reactor unit in national standard environmental radiation protection regulations of nuclear power plants (GB 6249-2011), and completing trend line drawing. According to the trend comparison, the change trend of the long-term emission level of the gas-borne tritium of the heavy water reactor unit of the nuclear power plant can be seen, and the conditions of whether the monitoring data exceeds the standard, which year exceeds the standard, the exceeding standard rate and the like are given.
Screening the emission basic information of the nuclear power plant A, and outputting parameters of the nuclear power plant A if the nuclear power plant A is a heavy water reactor unit, wherein the parameters are shown in the following table 1. And screening out emission data of the gas-carrying effluent radionuclide tritium in the heavy water reactor unit, outputting the emission data if the emission data is tritium emission data, and calling a management target value of the gas-carrying effluent tritium emission of the heavy water reactor unit in the module, wherein the parameters are shown in Table 2.
Table 1A heavy water reactor set parameters for nuclear power plants
TABLE 2A tritium emissions from nuclear plant gas-carrying effluent over the years
And (3) completing the screening of tritium emission data of the airborne effluent of all the discharge ports involved in the heavy water reactor unit. And outputting the trend change of the tritium carrying effluent tritium annual emission data and the management target value of the heavy water reactor unit of the nuclear power plant A, wherein the trend change is shown in figure 2.
The built-in monitoring data analysis module 4 is used for calling a nuclear power plant effluent normalized emission amount calculation formula to complete tritium normalized emission amount calculation, the calculation method is that the annual emission amount of the effluent is divided by the annual energy generation amount of the same period to obtain the normalized emission amount of the nuclide, the abscissa is obtained to be time, the ordinate is the nuclide tritium annual normalized emission amount to form a change curve of the emission amount along with the years, and the annual emission amount limit value of a tritium heavy water reactor unit in national standard environmental radiation protection regulations (GB 6249-2011) is called to complete trend line drawing, and the graph is shown in figure 3.
Examples: in order to obtain the change trend of the release amount of the source radon in the waste rock field of the A uranium mining and metallurgy facility for many years.
The trend analysis module 1 of the monitoring data will call the monitoring data of the waste rock field for the past year (radon exhalation rate monitoring data), and the emission basic information of the facilities (the exposed area of the waste rock field for the past year, radon release time). And (3) finishing screening of emission basic information of a certain uranium smelting facility, calling emission information of radon emission in a waste rock field of the uranium smelting facility, and acquiring the name, exposed area, position, emission time and the like of the emission facility. The built-in monitoring data analysis module 4 calls a uranium mining and metallurgy surface source radon release amount estimation formula to complete calculation of radon release amount, and the change trend of the radon release amount is obtained in the time of the abscissa and in the radon release amount of the ordinate.
Screening the surface source emission basic information of the waste rock field of the A uranium smelting facility, and outputting parameters of the basic information, wherein the parameters are shown in the following table 3.
Table 3A uranium mining and metallurgy facility waste rock field emission information
The built-in monitoring data analysis module 4 calls a uranium mining and metallurgy surface source radon release amount estimation formula, calculates radon release amount by adopting the following formula, and FRn =s·δ·t; wherein: f (F)Rn -radon release, bq/a; s-bare area of waste rock field, m2 The method comprises the steps of carrying out a first treatment on the surface of the Delta-radon exhalation rate, bq/(m)2 S); t-radon release time. The radon emission trend graph obtained is shown in fig. 4.
Examples: in order to obtain the annual trend of uranium concentration in the medium soil of the environment of the nuclear fuel circulation facility A. For natural radionuclides, local natural background can be selectively subtracted for analysis and evaluation.
The trend analysis module 1 of the monitoring data calls the monitoring result of the uranium concentration in the soil in the background investigation data of the nuclear fuel circulation facility, the annual radiation monitoring data of the uranium concentration in the soil, environment basic information (monitoring point name, relative distance from a factory site, relative azimuth, sampling number, analysis method, detection limit and the like), and standard values of the environment quality standard about the uranium concentration in the soil. The built-in monitoring data analysis module 4 outputs the change trend of uranium concentration in soil of the past year when trend analysis is carried out, and the background is deducted selectively, so that S can be automatically completedSample of ＝SMonitoring value -SBackground value And (3) giving a trend change analysis.
And (3) screening environmental basic information of environmental medium soil monitoring of the nuclear fuel circulation facility A, and outputting parameters of the environmental basic information, wherein the parameters are shown in the following table 4.
When uranium concentration monitoring data analysis in soil is carried out, the deduction background can be checked, the monitoring data analysis module 4 can automatically call the radiation background data of the database to complete the deduction calculation work of the data concentration, the trend analysis graph without deduction background is shown in fig. 5, and the trend analysis graph without deduction background is shown in fig. 6. As is evident from fig. 6, 1# Monitoring uranium concentration in point location soil within background range, 2# The point location has an increased uranium concentration compared to the region background value. The added subtraction background function can obviously help the user determine which points are out of standard.
Table 4A nuclear fuel circulation facility environmental media soil monitoring call information
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.