Method and device, equipment, and medium for controlling the discharge of liquid effluents from coastal nuclear facilities

Abstract

The present invention provides a method and device, equipment, and storage medium for controlling the discharge of liquid effluents from coastal nuclear facilities. The control method includes: simulating the dilution effect of liquid effluents in the discharge sea area according to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluents; constructing a database based on the dilution effect and the corresponding hydrological conditions and discharge conditions; screening out multiple first data sets that meet the minimum dilution ratio from the database; screening out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration; measuring the real-time tidal range of the discharge sea area, and determining whether to discharge the liquid effluents according to the real-time tidal range and the second data set. The present invention can dynamically adjust the discharge flow rate of liquid effluents in real time, make full use of the dilution and diffusion effect of the sea tide, so as to reduce the concentration of radionuclides in the liquid effluents discharged from nuclear facilities near the shore, thereby achieving the purpose of protecting the public and the ecological environment.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear facilities, and particularly to a method and device, equipment, and storage medium for controlling the discharge of liquid effluents from coastal nuclear facilities. Background Art

[0002] The discharge of liquid effluents is one of the main ways for nuclear facilities to release radioactive substances into the environment during operation. After being discharged into the environment, the radiation dose caused to the public and the ecological environment around the nuclear facility site is a key content reviewed by the regulatory authorities and is also highly concerned by the public. Compared with inland waters, the ocean has a stronger dilution and diffusion ability. Therefore, as the receiving water area for the discharge of liquid effluents from coastal nuclear facilities, it has more advantages.

[0003] For nuclear power plants and other types of nuclear facilities that adopt secondary circulation or separate discharge of liquid effluents, due to the lack of dilution by a large amount of circulating cooling water, the concentration of liquid effluents before entering the sea during the operation of nuclear facilities is relatively high, and the radiation dose caused to the public and the environment near the discharge port may be relatively large. Therefore, appropriate discharge methods need to be adopted to minimize its impact on the public and the ecological environment around the nuclear facility.

[0004] In view of the problem in the above related technologies that the concentration of liquid effluents before entering the sea during the operation of nuclear facilities is relatively high, causing serious impacts on the public and the ecological environment around the nuclear facility, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present invention provide a method and device, equipment, and storage medium for controlling the discharge of liquid effluents from coastal nuclear facilities, so as to overcome the problem in the related technologies that the concentration of liquid effluents before entering the sea during the operation of nuclear facilities is relatively high, causing serious impacts on the public and the ecological environment around the nuclear facility.

[0006] To achieve the above object, in the first aspect of the embodiments of the present invention, a method for controlling the discharge of liquid effluents from coastal nuclear facilities is provided, including:

[0007] According to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluents, simulate the dilution effect of the liquid effluents in the discharge sea area; the hydrological conditions include the tidal range of different tidal types, and the discharge conditions include the discharge time period, discharge duration, and discharge flow rate; the dilution effect represents the dilution ratio of the liquid effluents discharged in each specified sea area under the hydrological conditions and discharge conditions.

[0008] Construct a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions; the database includes multiple preset data sets, and the preset data set includes the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the preset dilution ratio.

[0009] Determine the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the sea area where the effluent is discharged.

[0010] Screen out multiple first data sets that meet the minimum dilution ratio from the database. The first data set includes the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the minimum dilution ratio.

[0011] Screen out a second data set from the first data set according to the obtained target discharge time period and target discharge duration. The second data set includes the tidal range and discharge flow rate corresponding to the target discharge time period and target discharge duration.

[0012] Measure the real-time tidal range of the sea area where the effluent is discharged, and determine whether to discharge the liquid effluent according to the real-time tidal range and the second data set.

[0013] The method for controlling the discharge of liquid effluent from coastal nuclear facilities provided by the present invention can dynamically adjust the discharge flow rate of liquid effluent in real time according to the changes in the tidal hydrological conditions of the sea area where the effluent is discharged, make full use of the dilution and diffusion effect of the sea tide, so as to reduce the concentration of radionuclides in the liquid effluent discharged from the nuclear facility near the shore, thereby achieving the purpose of protecting the public and the ecological environment.

[0014] Optionally, in a possible implementation manner of the first aspect, determining whether to discharge the liquid effluent according to the real-time tidal range and the second data set includes:

[0015] When the real-time tidal range is less than or equal to the minimum value of the tidal range in the second data set, do not discharge the liquid effluent.

[0016] When the real-time tidal range is greater than or equal to the maximum value of the tidal range in the second data set, determine to discharge the liquid effluent and set the target discharge flow rate of the liquid effluent to the maximum value.

[0017] The method for controlling the discharge of liquid effluent from coastal nuclear facilities provided by the present invention dynamically controls the discharge flow rate of the liquid effluent by comparing the magnitude relationship between the real-time tidal range and the minimum and maximum values of the tidal range in the second data set, can reduce the discharge flow rate when the tidal range is small, thereby weakening the influence of adverse tidal patterns on the dilution and diffusion of radionuclides; when the tidal range in the sea area is large, increase the discharge flow rate, and use the offshore ebb current to carry the liquid effluent discharged from the nuclear facility to the open sea, which is more conducive to dilution and diffusion and reducing the concentration in the nearshore sea area, and has a positive effect on protecting the nearshore human, aquaculture and marine ecology.

[0018] Optionally, in a possible implementation manner of the first aspect, determining whether to discharge the liquid effluent according to the real-time tidal range and the second data set includes:

[0019] When the real-time tidal range is greater than the minimum value of the tidal ranges in the second dataset and less than the maximum value of the tidal ranges in the second dataset, the real-time tidal range is matched with all the tidal ranges in the second dataset;

[0020] If the corresponding target tidal range is matched, the discharge flow rate corresponding to the target tidal range in the second dataset is used as the target discharge flow rate of the liquid effluent.

[0021] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention matches the real-time tidal range with all the tidal ranges in the second dataset to obtain the discharge flow rate corresponding to the real-time tidal range, thereby achieving the purpose of dynamically controlling the discharge flow rate of liquid effluents in real time, greatly optimizing the dilution effect of liquid effluents in the near shore, and thus reducing the impact on the near shore public and the ecological environment.

[0022] Optionally, in a possible implementation manner of the first aspect, the method further includes:

[0023] If the corresponding target tidal range is not matched, the first tidal range and the second tidal range in the second dataset that are closest to the real-time tidal range in terms of numerical value, the first discharge flow rate corresponding to the first tidal range, and the second discharge flow rate corresponding to the second tidal range are obtained; the first tidal range is less than the real-time tidal range, and the second tidal range is greater than the real-time tidal range;

[0024] Determine the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate.

[0025] Optionally, in a possible implementation manner of the first aspect, determining the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate includes:

[0026] Determine the target discharge flow rate of the liquid effluent according to the following formula:

[0027] Q = Q j +(Q j+1 -Q j ) / (H j+1 -H j )*(H-H j )

[0028] where Q represents the target discharge flow rate, H represents the real-time tidal range, Q j represents the first discharge flow rate, Q j+1 represents the second discharge flow rate, H j represents the first tidal range, and H j+1 represents the second tidal range.

[0029] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention can achieve real-time regulation of the discharge flow rate of liquid effluents by matching the real-time tidal range with all tidal ranges in the second data set and using linear interpolation to calculate the discharge flow rate of liquid effluents when no corresponding tidal range is found, so as to cope with the real-time changing tidal range in the discharge sea area and optimize the dilution effect of liquid effluents near the shore to the greatest extent.

[0030] Optionally, in a possible implementation manner of the first aspect, it further includes:

[0031] Determine the radionuclide concentration of the liquid effluent according to the design parameters of the nuclear facility;

[0032] Determine the maximum allowable concentration of radionuclides in the discharge sea area according to the preset control conditions; the preset control conditions include setting a target threshold for the radiation dose caused by the liquid effluents discharged from the nuclear facility.

[0033] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention can reduce the impact of the discharge of liquid effluents on the public and the ecological environment around the nuclear facility by setting a threshold for the radiation dose caused by the liquid effluents discharged from the nuclear facility.

[0034] Optionally, in a possible implementation manner of the first aspect, determining the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area includes:

[0035] K min = C0 / C limit

[0036] where K min represents the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements, C0 represents the radionuclide concentration of the liquid effluent, and C limit represents the maximum allowable concentration of radionuclides in the discharge sea area.

[0037] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention can strictly control the impact degree of liquid effluents on the public and the ecological environment near the shore by determining the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharged sea area, so as to achieve the purpose of protecting the public and the ecological environment.

[0038] In the second aspect of the embodiments of the present invention, a device for controlling the discharge of liquid effluents from coastal nuclear facilities is provided, including:

[0039] A simulated dilution effect module, which is used to simulate the dilution effect of liquid effluent in the discharge sea area according to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluent; the hydrological conditions include the tidal range of different tidal types, and the discharge conditions include the discharge time period, the discharge duration, and the discharge flow rate; the dilution effect represents the dilution multiple of the liquid effluent discharged in each specified sea area under the hydrological conditions and the discharge conditions.

[0040] A database construction module, which is used to construct a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions; the database includes multiple preset data sets, and the preset data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to the preset dilution multiple.

[0041] A minimum dilution multiple determination module, which is used to determine the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area.

[0042] A first screening module, which is used to screen out multiple first data sets that meet the minimum dilution multiple from the database. The first data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to the minimum dilution multiple.

[0043] A second screening module, which is used to screen out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration; the second data set includes the tidal range and the discharge flow rate corresponding to the target discharge time period and the target discharge duration.

[0044] An emission control module, which is used to measure the real-time tidal range of the discharge sea area and determine whether to discharge the liquid effluent according to the real-time tidal range and the second data set.

[0045] In the third aspect of the embodiments of the present invention, a computer device is provided, including a memory and a processor. The memory stores a computer program that can run on the processor, and when the processor executes the computer program, the steps in the above-mentioned various method embodiments are implemented.

[0046] In the fourth aspect of the embodiments of the present invention, a readable storage medium is provided. The readable storage medium stores a computer program, and when the computer program is executed by a processor, it is used to implement the steps of the methods in the first aspect and various possible designs of the first aspect of the present invention. Description of the Drawings

[0047] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required for the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 It is a schematic flowchart of the method for controlling the discharge of liquid effluents from a coastal nuclear facility in Embodiment 1 of the present invention.

[0049] Figure 2 It is a principle block diagram of the device for controlling the discharge of liquid effluents from a coastal nuclear facility in Embodiment 2 of the present invention.

[0050] Figure 3 It is a structural diagram of the computer device in Embodiment 3 of the present invention. Specific Embodiments

[0051] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] Example 1

[0056] This embodiment provides a method for controlling the discharge of liquid effluents from coastal nuclear facilities, as Figure 1 shown, the discharge control method includes the following steps but is not limited to steps S100 to S600.

[0057] S100: According to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluents, simulate the dilution effect of the liquid effluents in the discharge sea area.

[0058] Specifically, the discharge sea area can be set as the sea area within a predetermined range (such as an 80-km range) around the nuclear facility; the discharge sea area can be a tidal sea area dominated by different continuous single tides (i.e., changing with a semi-diurnal cycle). For this type of discharge sea area, the main flow directions of the flood tide and the ebb tide are generally perpendicular to the shoreline. When the tidal range in the sea area is large, the offshore ebb tide can be used to carry the liquid effluents discharged from the nuclear facility to the open sea, which is more conducive to dilution and diffusion and reducing the concentration in the nearshore sea area.

[0059] Specifically, the hydrological conditions of the discharge sea area include but are not limited to the tidal ranges of different tidal types. Tidal types can be divided into single tides and semi-monthly tides. A single tide generally refers to a tide with a semi-diurnal cycle. The highest and lowest tide levels and hydraulic properties such as flow velocity and flow direction of different single tides are different; a semi-monthly tide generally has a semi-monthly cycle and is composed of different continuous single tides.

[0060] Specifically, liquid effluents refer to the radioactive nuclides generated by nuclear facilities mixed with a certain volume of cooling water for discharge; the discharge conditions of liquid effluents include but are not limited to the discharge time period, discharge duration, and discharge flow rate within different tidal cycles. For example, there are two tidal cycles per day. The discharge time period can be set to start at the 1st hour after the ebb tide begins in the first tidal cycle, the discharge duration can be set to 2 hours, and the discharge flow rate can be set to 0.05 cubic meters per second; or the discharge conditions can be set to discharge liquid effluents after the ebb tide begins in each tidal cycle, with a discharge duration of 1 hour and a discharge flow rate of 0.12 cubic meters per second. Or the discharge conditions can be set to continuous and uniform discharge throughout the whole period, continuous discharge during the ebb tide, or only discharge within the 1st hour of the ebb tide, and the discharge flow rate can be set according to the actual situation.

[0061] Specifically, the dilution effect represents the dilution ratio K(x,y) of the liquid effluent discharged into each specified sea area under hydrological conditions and discharge conditions, where (x,y) represents the position coordinates of the specified sea area in the discharge sea area, and K(x,y) represents the dilution ratio of the specified sea area. Simulating the dilution effect of the liquid effluent in the discharge sea area can be understood as, through the previous investigation and analysis of data such as meteorology and hydrology in the discharge sea area, adopting a numerical simulation method, using different continuous single tides in the sea area as the controlled tide types, and simulating and calculating the dilution ratios of the liquid effluent under different tidal ranges, different discharge time periods, different discharge durations, and different discharge flows, etc.

[0062] S200: Construct a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions.

[0063] Specifically, the database includes multiple preset data sets. Each preset data set includes a dilution ratio, the tidal range corresponding to the dilution ratio, the discharge time period corresponding to the dilution ratio, the discharge duration corresponding to the dilution ratio, and the discharge flow corresponding to the dilution ratio. Next, this embodiment will exemplarily illustrate the composition of the preset data set with preset data set 1 and preset data set 2, and the specific content is as follows.

[0064] Preset data set 1: {Dilution ratio (20) - Tidal range (2.7 meters) - Discharge time period (starting from the second hour of each ebb tide) - Discharge duration (lasting 50 minutes) - Discharge flow (0.07 cubic meters per second)};

[0065] Preset data set 2: {Dilution ratio (25) - Tidal range (5 meters) - Discharge time period (starting from the first hour of each ebb tide) - Discharge duration (lasting 45 minutes) - Discharge flow (0.24 cubic meters per second)}.

[0066] S300: Determine the minimum dilution ratio of the liquid effluent that meets the nuclear concentration requirements of the sea area according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area.

[0067] Preferably, step S300 includes the following steps:

[0068] S310: Determine the radionuclide concentration of the liquid effluent according to the design parameters of the nuclear facility.

[0069] Specifically, the design parameters of nuclear facilities include, but are not limited to, different types of reactor models. Taking nuclear power plants as an example, the types of reactor models include pressurized water reactors, boiling water reactors, gas-cooled reactors, etc. The types and concentrations of radionuclides generated during the operation stage of different types of reactor models are different. Therefore, according to the design parameters of the nuclear facility, the concentration of radionuclides to be controlled at the outlet of the nuclear facility can be determined (for example, the concentration of tritium discharged from the nuclear facility is 2.5*105 Bq / L, and Bq / L represents the measurement unit of the radiation dose of this substance per liter).

[0070] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention can reduce the impact of the discharge of liquid effluents on the public and the ecological environment around the nuclear facility by setting a threshold for the radiation dose caused by the liquid effluents discharged from the nuclear facility.

[0071] S320: Determine the maximum allowable concentration of radionuclides in the discharge sea area according to the preset control conditions.

[0072] Specifically, the preset control conditions include, but are not limited to, setting a target threshold for the radiation dose caused by the liquid effluents discharged from the nuclear facility. It can be understood that: according to laws, regulations, guidelines and industry standards, limits or control target values are set for the radiation dose caused by the liquid effluents discharged from the nuclear facility; thus, the maximum allowable concentration of radionuclides is calculated based on the radiation dose limit or control target value.

[0073] More specifically, the following example is used to specifically illustrate step S320:

[0074] According to relevant legal documents and industry standards of sea area planning, select the average concentration of radionuclides at a specific location in the discharge sea area as the discharge control index of the liquid effluents in the discharge sea area; for example, the average concentration of a certain radionuclide in seawater (such as 1 km) at a preset distance from the nuclear facility can be selected as the discharge control index of the liquid effluents in the discharge sea area. It can be understood that within the preset range (such as an 80 km range) of the sea area around the nuclear facility, the average concentration of radionuclides in seawater 1 km from the shore shall not exceed the concentration index requirement of a certain radionuclide (such as the concentration limit of radionuclide tritium can be selected as 10000 Bq / L).

[0075] S330: Determine the minimum dilution ratio of the liquid effluents that meet the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluents and the maximum allowable concentration of radionuclides in the discharge sea area.

[0076] K min = C0 / C limit

[0077] Where K minRepresents the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements. C0 represents the radionuclide concentration of the liquid effluent, and C limit Represents the maximum allowable concentration of radionuclides in the sea area where emissions are made.

[0078] Specifically, the radionuclide concentration C0 of the liquid effluent is represented by the concentration of the radionuclide tritium discharged from the facility, which is 2.5*105 Bq / L; the maximum allowable concentration C of radionuclides in the sea area where emissions are made limit , is represented by the concentration limit of the radionuclide tritium, which is 10000 Bq / L; the minimum dilution multiple can be calculated through the above formula, that is, the dilution multiple required for the radionuclide tritium is 25.

[0079] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention can strictly control the impact degree of liquid effluents on the nearshore public and the ecological environment by determining the minimum dilution multiple of the liquid effluents that meet the sea area accounting concentration requirements based on the radionuclide concentration of the liquid effluents and the maximum allowable concentration of radionuclides in the sea area where emissions are made, so as to achieve the purpose of protecting the public and the ecological environment.

[0080] S400: Screen out multiple first data sets that meet the minimum dilution multiple from the database. The first data set includes the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the minimum dilution multiple.

[0081] Specifically, after determining the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements, multiple first data sets corresponding to the minimum dilution multiple can be screened out from multiple preset data sets in the database. The common point of screening out multiple first data sets is that the dilution multiples of the first data sets are the same as or close to the minimum dilution multiple, and the difference is that at least one of the data of the tidal range H, discharge time period t, discharge duration s, and discharge flow rate Q in the first data set is different.

[0082] S500: Screen out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration; the second data set includes the tidal range and discharge flow rate corresponding to the target discharge time period and target discharge duration.

[0083] Specifically, the target discharge time period and target discharge duration can be determined according to the geographical location of the nuclear facility site. For example, when the tidal range of the tide in the sea area where the nuclear facility site is located is large, the target discharge time period and target discharge duration can be set to the entire time period of the ebb tide for discharge; when the tidal range of the tide in the sea area where the nuclear facility site is located is small, the target discharge time period and target discharge duration can be set to discharge only within the first hour at the beginning of the ebb tide.

[0084] Specifically, after determining the target emission time period and the target emission duration, a second data set can be screened out from multiple first data sets. For example, the first data set is represented by "A", and the second data set is represented by "B". After screening through step S400, A1, A2, A3, A4, A5, and A6 are obtained. After screening through step S500, A1, A3, A4, and A6 are obtained. Among them, the target emission time period and the target emission duration of A1, A3, A4, and A6 are the same.

[0085] Specifically, both the first data set and the second data set include a preset dilution ratio, the tidal range corresponding to the preset dilution ratio, the emission time period corresponding to the preset dilution ratio, the emission duration corresponding to the preset dilution ratio, and the emission flow rate corresponding to the preset dilution ratio. The difference is that the preset dilution ratios of the screened first data sets are all the same, and the preset dilution ratios, emission time periods, and emission durations of the screened multiple second data sets are the same.

[0086] S600: Measure the real-time tidal range of the emission sea area, and determine whether to discharge the liquid effluent according to the real-time tidal range and the second data set.

[0087] Preferably, step S600 further includes the following steps:

[0088] S610: When the real-time tidal range is less than or equal to the minimum value of the tidal ranges in the second data set, do not discharge the liquid effluent.

[0089] Specifically, when the real-time measured (or predicted) tidal range H is less than or equal to the minimum value H i , Q i of the tidal ranges in the second data set φ(H min ), then do not discharge the liquid effluent, that is, the target emission flow rate Q = 0.

[0090] S620: When the real-time tidal range is greater than or equal to the maximum value of the tidal ranges in the second data set, then determine to discharge the liquid effluent, and set the target emission flow rate of the liquid effluent to the maximum value.

[0091] Specifically, when the real-time measured (or predicted) tidal range H is greater than or equal to the maximum value H i , Q i of the tidal ranges in the second data set φ(H max ), then determine to discharge the liquid effluent, and set the target emission flow rate to Q = Q max .

[0092] More specifically, the maximum value Q max of the emission flow rate of the liquid effluent can be determined according to the mechanical parameters of the drainage equipment of the nuclear facility.; wherein the mechanical parameters of the drainage equipment include the head of the drainage pump, the diameter of the drainage outlet, etc., and the mechanical properties of the drainage pump and mechanical parameters such as the diameter of the drainage outlet can determine the upper limit of the discharge flow rate.

[0093] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention dynamically controls the discharge flow rate of liquid effluents by comparing the relationship between the real-time tidal difference and the minimum and maximum values of the tidal differences in the second data set, and can achieve reducing the discharge flow rate when the tidal difference is small, thereby weakening the influence of adverse tidal patterns on the dilution and diffusion of radionuclides; increasing the discharge flow rate when the tidal difference in the sea area is large, and using the offshore ebb current to carry the liquid effluents discharged from the nuclear facilities to the open sea, which is more conducive to dilution and diffusion and reducing the concentration in the nearshore sea area, and has a positive effect on protecting the nearshore humans, aquaculture and marine ecology.

[0094] S630: When the real-time tidal difference is greater than the minimum value of the tidal differences in the second data set and less than the maximum value of the tidal differences in the second data set, then match the real-time tidal difference with all the tidal differences in the second data set.

[0095] Specifically, when the tidal difference H measured (or predicted) in real time is between the minimum value H min of the tidal differences and the maximum value H max of the tidal differences, then match the tidal difference H measured (or predicted) in real time with the second data set φ(H i , Q i ).

[0096] Preferably, step S630 further includes the following steps:

[0097] S631: If the corresponding target tidal difference is matched, then use the discharge flow rate corresponding to the target tidal difference in the second data set as the target discharge flow rate of the liquid effluents.

[0098] Specifically, if there is a matching tidal difference H in the second data set φ(H i , Q i ), then use the discharge flow rate Q corresponding to the matching tidal difference H in the second data set as the target discharge flow rate of the liquid effluents.

[0099] The method for controlling the discharge of liquid effluents from coastal nuclear facilities provided by the present invention matches the real-time tidal difference with all the tidal differences in the second data set, and matches the discharge flow rate corresponding to the real-time tidal difference, so as to achieve the purpose of dynamically controlling the discharge flow rate of liquid effluents in real time, greatly optimizing the dilution effect of liquid effluents in the near shore, and thus reducing the impact on the near shore public and ecological environment.

[0100] S632: If no corresponding target tidal range is matched, obtain the first tidal range and the second tidal range in the second dataset that are closest to the real-time tidal range value, the first discharge flow rate corresponding to the first tidal range, and the second discharge flow rate corresponding to the second tidal range; determine the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate; the first tidal range is less than the real-time tidal range, and the second tidal range is greater than the real-time tidal range.

[0101] Specifically, if there is no matching tidal range H in the second dataset φ(H i , Q i ), then select the two points (H j , Q j ) and (H j+1 , Q j+1 ) in the second dataset that are closest to this tidal range, where H j < H < H j+1 , and the target discharge flow rate Q can be obtained by linear interpolation, that is:

[0102] Q = Q j + (Q j+1 - Q j ) / (H j+1 - H j ) * (H - H j )

[0103] where Q represents the target discharge flow rate, H represents the real-time tidal range, Q j represents the first discharge flow rate, Q j+1 represents the second discharge flow rate, H j represents the first tidal range, and H j+1 represents the second tidal range.

[0104] The method for controlling the discharge of liquid effluent from a coastal nuclear facility provided by the present invention can achieve real-time regulation of the discharge flow rate of liquid effluent by matching the real-time tidal range with all tidal ranges in the second dataset and using linear interpolation to calculate the discharge flow rate of liquid effluent when no corresponding tidal range is matched, so as to cope with the real-time changing tidal range in the discharge sea area and optimize the dilution effect of liquid effluent in the near shore to the greatest extent.

[0105] Preferably, after obtaining the target discharge flow rate of the liquid effluent, the target discharge flow rate is fed back to the discharge pump control system of the liquid effluent storage tank of the nuclear facility in real time, and then the discharge flow rate of the liquid effluent is adjusted, so as to achieve dynamic control of the discharge amount.

[0106] The technical solution of the present invention also has the following technical effects:

[0107] The present invention utilizes the tidal characteristics and dilution and diffusion capabilities of the ocean, dynamically adjusts the discharge flow rate of liquid effluents according to the tidal range of the sea area, increases the discharge flow rate when the tidal range is large, and decreases the discharge flow rate when the tidal range is small, weakens the influence of adverse tidal patterns on the dilution and diffusion of radionuclides, and makes full use of favorable tidal patterns, which can greatly optimize the dilution effect of liquid effluents in the near shore, effectively reduce their concentration in the near shore, and thus reduce their impact on the public and ecological environment in the near shore.

[0108] Taking a nuclear facility along the coast of China as an example, the above technical solution is described as follows:

[0109] First, the hydrodynamic conditions of the sea area throughout the year were simulated, the dilution multiples of liquid effluents under different tidal patterns were calculated, a relevant database was established based on the results, and the distribution K of the dilution multiples of liquid effluents under different tidal ranges H, different discharge time periods T, different discharge durations S, and different discharge flow rates Q was obtained. H (x,y) data set, that is, {H, T, S, Q, K H (x,y)}.

[0110] According to the planning of the sea area, the average concentration of a certain radionuclide in seawater at a certain distance from the shore (such as 1 km) is selected as the control index for the discharge of liquid effluents from this nuclear facility. It can be stipulated that within a certain range (such as an 80 km range) of the sea area around this nuclear facility, the average concentration of the whole tide in seawater at 1 km from the shore shall not exceed the requirements of a certain activity concentration index (such as the concentration limit of the radionuclide tritium can be selected as 10000 Bq / L).

[0111] Meanwhile, according to the preliminary design of the nuclear facility, determine the concentration of radionuclides to be controlled at the discharge outlet of the nuclear facility (for example, the activity concentration of tritium discharged from this facility is 2.5×10⁵ Bq / L), and then obtain the minimum dilution ratio at 1 km offshore. (In this example, the dilution ratio required for tritium is 25). Query the previously established database to obtain the discharge condition dataset corresponding to this minimum dilution ratio (including the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the minimum dilution ratio). In this case, the discharge time period and discharge duration can be set such that the nuclear facility discharges liquid effluents in the first hour of each ebb tide in the sea area. By comparing the dataset, a parameter set φ(Hi, Qi) of the tidal range and discharge flow rate of the tide under this discharge scheme is obtained. In this parameter set, the minimum tidal range is 2.5 m, the corresponding discharge flow rate is 0.05 m³ / s, and the maximum tidal range is 5 m. At the same time, according to the preliminary design of the nuclear facility, the maximum allowable discharge flow rate is 0.24 m³ / s. According to the measured tidal range H and the parameter set, the discharge flow rate Q of the liquid effluent can be adjusted: when H≤2.5 m, Q = 0, and no liquid effluent is discharged; when H≥5 m, Q = 0.24 m³ / s; when H is between 2.5 m and 5 m, then the corresponding Q is queried by matching the parameter set φ(Hi, Qi). Thus, by measuring the tidal range of the tide, the calculated discharge flow rate can be fed back to the control system of the discharge pump of the liquid effluent storage tank in real time, and the system dynamically adjusts the discharge amount of the liquid effluent according to the input flow rate to achieve dynamic control of the discharge.

[0112] Embodiment 2

[0113] This embodiment provides a device for controlling the discharge of liquid effluents from a coastal nuclear facility, as Figure 2 shown, including:

[0114] A simulated dilution effect module for simulating the dilution effect of liquid effluents in the discharge sea area according to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluents; the hydrological conditions include the tidal ranges of different tidal types, and the discharge conditions include the discharge time period, discharge duration, and discharge flow rate; the dilution effect represents the dilution ratio of the liquid effluents discharged in each specified sea area under the hydrological conditions and discharge conditions.

[0115] A database construction module for constructing a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions; the database includes multiple preset datasets, and the preset datasets include the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the preset dilution ratio.

[0116] A minimum dilution ratio determination module for determining the minimum dilution ratio of the liquid effluents that meet the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluents and the maximum allowable concentration of radionuclides in the discharge sea area.

[0117] The first screening module is used to screen out multiple first data sets that meet the minimum dilution ratio from the database. The first data set includes the tidal range, discharge time period, discharge duration, and discharge flow rate corresponding to the minimum dilution ratio.

[0118] The second screening module is used to screen out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration. The second data set includes the tidal range and discharge flow rate corresponding to the target discharge time period and target discharge duration.

[0119] The discharge control module is used to measure the real-time tidal range of the discharge sea area, and determine whether to discharge liquid effluent according to the real-time tidal range and the second data set.

[0120] Preferably, the discharge control module includes:

[0121] The first determination module is used to not discharge liquid effluent when the real-time tidal range is less than or equal to the minimum value of the tidal range in the second data set.

[0122] The second determination module is used to determine to discharge liquid effluent when the real-time tidal range is greater than or equal to the maximum value of the tidal range in the second data set, and set the target discharge flow rate of the liquid effluent to the maximum value.

[0123] Preferably, the discharge control module includes:

[0124] The third determination module is used to match the real-time tidal range with all the tidal ranges in the second data set when the real-time tidal range is greater than the minimum value of the tidal range in the second data set and less than the maximum value of the tidal range in the second data set. If a corresponding target tidal range is matched, the discharge flow rate corresponding to the target tidal range in the second data set is used as the target discharge flow rate of the liquid effluent.

[0125] Preferably, the liquid effluent discharge control device for coastal nuclear facilities further includes:

[0126] The data acquisition unit is used to obtain the first tidal range and the second tidal range that are closest to the real-time tidal range value in the second data set, the first discharge flow rate corresponding to the first tidal range, and the second discharge flow rate corresponding to the second tidal range if no corresponding target tidal range is matched.

[0127] The discharge flow rate determination unit is used to determine the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate; the first tidal range is less than the real-time tidal range, and the second tidal range is greater than the real-time tidal range.

[0128] Preferably, the discharge flow rate determination unit is used to determine the target discharge flow rate of the liquid effluent in the following manner:

[0129] Q = Qj +(Q j+1 -Q j ) / (H j+1 -H j )*(H - H j )

[0130] Wherein, Q represents the target discharge flow rate, H represents the real-time tidal range, Q j represents the first discharge flow rate, Q j+1 represents the second discharge flow rate, H j represents the first tidal range, H j+1 represents the second tidal range.

[0131] Preferably, the minimum dilution ratio determination module includes:

[0132] A concentration determination unit for determining the radionuclide concentration of the liquid effluent according to the design parameters of the nuclear facility;

[0133] A maximum concentration determination unit for determining the maximum allowable concentration of radionuclides in the discharge sea area according to preset control conditions; the preset control conditions include setting a target threshold for the radiation dose caused by the liquid effluent discharged from the nuclear facility.

[0134] Preferably, the minimum dilution ratio determination module is used to determine the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements in the following manner:

[0135] K min = C0 / C limit

[0136] Wherein, K min represents the minimum dilution ratio of the liquid effluent that meets the sea area accounting concentration requirements, C0 represents the radionuclide concentration of the liquid effluent, and C limit represents the maximum allowable concentration of radionuclides in the discharge sea area.

[0137] Embodiment 3

[0138] The present invention also provides a computer device, as Figure 3 shown, including a memory and a processor, the memory stores a computer program that can run on the processor, and when the processor executes the computer program, it implements the coastal nuclear facility liquid effluent discharge control method provided by the above various embodiments.

[0139] The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the coastal nuclear facility liquid effluent discharge control method provided by the above various embodiments.

[0140] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0141] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0142] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0144] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A method for controlling the discharge of liquid effluents from a coastal nuclear facility, characterized in that, Including: Simulate the dilution effect of the liquid effluent in the discharge sea area according to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluent; the hydrological conditions include the tidal range of different tidal types, and the discharge conditions include the discharge time period, the discharge duration, and the discharge flow rate; the dilution effect represents the dilution multiple of the liquid effluent discharged in each specified sea area under the hydrological conditions and the discharge conditions. Construct a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions; the database includes multiple preset data sets, and the preset data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to the preset dilution multiple. Determine the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area. Screen out multiple first data sets that meet the minimum dilution multiple from the database, and the first data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to the minimum dilution multiple. Screen out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration; the second data set includes the tidal range and the discharge flow rate corresponding to the target discharge time period and the target discharge duration. Measure the real-time tidal range of the discharge sea area, and determine whether to discharge the liquid effluent according to the real-time tidal range and the second data set.

2. The method for controlling the discharge of liquid effluents from a coastal nuclear facility according to claim 1, characterized in that, The determining whether to discharge the liquid effluent according to the real-time tidal range and the second data set includes: When the real-time tidal range is less than or equal to the minimum value of the tidal range in the second data set, do not discharge the liquid effluent. When the real-time tidal range is greater than or equal to the maximum value of the tidal range in the second data set, determine to discharge the liquid effluent, and set the target discharge flow rate of the liquid effluent to the maximum value.

3. The method for controlling the discharge of liquid effluents from coastal nuclear facilities according to claim 1 or 2, characterized in that, The determining whether to discharge the liquid effluent according to the real-time tidal range and the second data set includes: When the real-time tidal range is greater than the minimum value of the tidal range in the second data set and less than the maximum value of the tidal range in the second data set, match the real-time tidal range with all the tidal ranges in the second data set. If a corresponding target tidal range is matched, use the discharge flow rate corresponding to the target tidal range in the second data set as the target discharge flow rate of the liquid effluent.

4. The method for controlling the discharge of liquid effluents from coastal nuclear facilities according to claim 3, characterized in that, The method further includes: If no corresponding target tidal range is matched, obtain the first tidal range and the second tidal range with the closest numerical distance to the real-time tidal range in the second data set, the first discharge flow rate corresponding to the first tidal range, and the second discharge flow rate corresponding to the second tidal range; the first tidal range is less than the real-time tidal range, and the second tidal range is greater than the real-time tidal range. Determine the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate.

5. The method for controlling the discharge of liquid effluents from coastal nuclear facilities according to claim 4, characterized in that, Determining the target discharge flow rate of the liquid effluent according to the first tidal range, the second tidal range, the first discharge flow rate, and the second discharge flow rate includes: Determining the target discharge flow rate of the liquid effluent according to the following formula: Q = Q j +(Q j+1 -Q j ) / (H j+1 -H j )*(H - H j ) Among them, Q represents the target discharge flow rate, H represents the real-time tidal range, Q j represents the first discharge flow rate, Q j+1 represents the second discharge flow rate, H j represents the first tidal range, H j+1 represents the second tidal range.

6. The method for controlling the discharge of liquid radioactive effluents from a coastal nuclear facility according to claim 1, characterized in that, Further included are: Determining the radionuclide concentration of the liquid effluent according to the design parameters of the nuclear facility; Determining the maximum allowable concentration of radionuclides in the discharge sea area according to preset control conditions; the preset control conditions include setting a target threshold for the radiation dose caused by the liquid effluent discharged from the nuclear facility.

7. The method for controlling the discharge of liquid effluents from coastal nuclear facilities according to claim 6, characterized in that, Determining the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area includes: K min = C0 / C limit Among them, K min represents the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements, C0 represents the radionuclide concentration of the liquid effluent, and C limit represents the maximum allowable concentration of radionuclides in the discharge sea area.

8. A control device for discharging liquid effluent from a coastal nuclear facility, characterized in that, Included are: A simulation dilution effect module, configured to simulate the dilution effect of the liquid effluent in the discharge sea area according to the hydrological conditions of the discharge sea area and the discharge conditions of the liquid effluent; the hydrological conditions include the tidal ranges of different tidal types, and the discharge conditions include the discharge time period, the discharge duration, and the discharge flow rate; the dilution effect represents the dilution multiple of the liquid effluent discharged in each specified sea area under the hydrological conditions and the discharge conditions; A database construction module, configured to construct a database according to the dilution effect and the corresponding hydrological conditions and discharge conditions; the database includes a plurality of preset data sets, and the preset data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to a preset dilution multiple; A minimum dilution multiple determination module, configured to determine the minimum dilution multiple of the liquid effluent that meets the sea area accounting concentration requirements according to the radionuclide concentration of the liquid effluent and the maximum allowable concentration of radionuclides in the discharge sea area; A first screening module, configured to screen out a plurality of first data sets that meet the minimum dilution multiple from the database, and the first data sets include the tidal range, the discharge time period, the discharge duration, and the discharge flow rate corresponding to the minimum dilution multiple; A second screening module, configured to screen out a second data set from the first data sets according to the obtained target discharge time period and target discharge duration; the second data set includes the tidal range and the discharge flow rate corresponding to the target discharge time period and the target discharge duration; An emission control module, configured to measure the real-time tidal range of the discharge sea area and determine whether to discharge the liquid effluent according to the real-time tidal range and the second data set.

9. A computer device, comprising a memory and a processor, the memory storing a computer program that can run on the processor, characterized in that, When the processor executes the computer program, the steps of the method for controlling the discharge of liquid effluent from a coastal nuclear facility according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method for controlling the discharge of liquid effluent from a coastal nuclear facility according to any one of claims 1 to 7 are implemented.

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