Neutron source target body cooling water test system and digital twinborn simulation method thereof

Abstract

The invention discloses a neutron source target body cooling water test system and a digital twinborn simulation method thereof, the neutron source target body cooling water test system comprises a circulation loop and a purification loop, and a purification water path is arranged on a circulation path of the circulation loop; the circulation loop sequentially comprises a water tank, a shield pump, a first sensing group and a simulation loop along the circulation direction of water, and the simulation loop is connected in parallel between connecting passages of the circulation loop; the simulation loop comprises a simulation target and a second sensor group, and the second sensor group is distributed between the input end and the output end of the simulation target; the purification loop comprises a first purification set, a second purification set and an isolation valve set. Through the design of the experiment system and the simulation method, the experiment system can simulate a cooling water system and a purification system, can carry out an ion exchanger experiment and an abnormal working condition control experiment, and can provide data for the operation and maintenance of the cooling water system, so that the rehearsal of the experiment system is more accurate. The reliability of the cooling water system can be improved.

Description

Technical Field

[0001] The present invention relates to the field of target station water cooling test systems, and particularly to a neutron source target body cooling water test system and its digital twin simulation method. Background Art

[0002] A spallation neutron source mainly consists of an accelerator, a target station, and a neutron spectrometer. The target station water cooling system is an important part of the target station, including a set of heavy water cooling system and two sets of light water cooling systems, both of which belong to radioactive water cooling systems. The main function of the heavy water cooling system is to provide cooling water for continuous operation of the target station. Since heavy water flows through high-dose irradiation environment areas, spallation reactions and other reactions occur when neutrons and protons bombard the coolant, generating radionuclides, which increases the radioactivity level of the entire cooling water system, deteriorates the water quality, and affects the operation of the entire system. Summary of the Invention

[0003] An object of the present invention is to provide a neutron source target body cooling water test system and its digital twin simulation method to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A neutron source target body cooling water test system includes a circulation loop and a purification loop, and the purification water path is arranged on the circulation path of the circulation loop;

[0005] The circulation loop sequentially includes a water tank, a shielding pump, a first sensor group, and a simulation loop along the water circulation direction, and the simulation loop is connected in parallel between the connection paths of the circulation loop;

[0006] The simulation loop includes a simulation target and a second sensor group, and the second sensor group is distributed between the input end and the output end of the simulation target;

[0007] The purification loop includes a first purification group, a second purification group, and an isolation valve group. The first purification group and the second purification group are connected in series with each other, and the isolation valve group is interposed between the conduction connection points of the first purification group and the second purification group;

[0008] The first purification group includes a first filter, a first ion exchanger, and a third sensor group, and the first filter and the first ion exchanger are connected in series;

[0009] The second purification group includes a second filter, a second ion exchanger, and a fourth sensor group, and the second filter and the second ion exchanger are connected in series.

[0010] Preferably, a first valve is arranged between the connection path of the water tank and the shielding pump, a second valve is arranged at the water inlet end of the water tank, and a first isolation valve is arranged at the discharge end of the simulation target.

[0011] Preferably, a third valve is provided between the first filter and the drainage end of the circulating water circuit, a fourth valve is provided between the second filter and the water tank, a first filtration valve is provided at the drainage end of the first filter, a first ion exchange valve is provided at the drainage end of the first ion exchanger, a second filtration valve is provided at the drainage end of the second filter, and a second ion exchange valve is provided at the drainage end of the second ion exchanger.

[0012] Preferably, it further includes a first resin replenishment port and a second resin replenishment port; the first resin replenishment port is communicated with the outlet end of the first ion exchanger, a first replenishment valve is provided at the first resin replenishment port, the second resin replenishment port is communicated with the outlet end of the second ion exchanger, and a second replenishment valve is provided at the second resin replenishment port.

[0013] Preferably, it further includes a first sampling point and a second sampling point. The first sampling point is communicated with the inlet end of the first purification group, a first sampling valve is provided at the first sampling point, the second sampling point is communicated with the outlet end of the second purification group, and a second sampling valve is provided at the fourth sampling point.

[0014] Preferably, it further includes a first drain port and a second drain port. The first drain port is arranged in the circulation loop, a first drain valve is provided at the first drain port, the second drain port is arranged in the purification loop, a second drain valve is provided at the second drain port, a fifth valve is connected in series between the discharge end of the first filter and the second drain port, a sixth valve is connected in series between the discharge end of the first ion exchanger and the second drain port, a seventh valve is connected in series between the discharge end of the second filter and the second drain port, and an eighth valve is connected in series between the discharge end of the second ion exchanger and the second drain port.

[0015] Preferably, it further includes a nitrogen circuit. The nitrogen circuit includes a nitrogen cylinder, the nitrogen cylinder is arranged at the air inlet end of the water tank, and a nitrogen valve and a nitrogen circuit sensor are sequentially arranged between the connection path of the nitrogen cylinder and the water tank.

[0016] Preferably, the first sensor group includes a pressure sensor, a temperature sensor and a flow rate sensor, the second sensor group includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors, the third sensor group includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors, and the fourth sensor group includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors.

[0017] A digital twin simulation method for the neutron source target cooling water test system, using the experimental system described above, the simulation method includes the following steps:

[0018] First step, data acquisition is carried out. Measure the three-dimensional structure of the neutron source target cooling water test system to obtain the structural data of the system; collect the operating parameters of the system by pre-recording the operating data of the neutron source target cooling water test system; the operating parameters at least include the flow rate of the circulation loop, the pressure of the circulation loop, the flow velocity of the circulation loop, the flow rate of the purification loop, the pressure of the purification loop, and the flow velocity of the purification loop.

[0019] Second step, model establishment is carried out. Use the system structure data obtained in the first step to establish a three-dimensional model of the neutron source target cooling water test system; use the system operating parameters and system structure data obtained in the first step to establish a simulation model of the neutron source target cooling water test system. The three-dimensional model is established based on 3D software such as CAD, and the simulation model is established based on hydraulic system simulation software.

[0020] Third step, simulation processing is carried out. Based on the three-dimensional model and simulation model established in the second step, set the simulation running time and simulation model in the computer simulation software. The simulation model uses the simplest model of the computer simulation software.

[0021] Fourth step, simulation verification is carried out. Compare the simulation result data obtained by running the simulation in the third step with the operating parameters collected in the first step to obtain the data of the digital twin simulation of the neutron source target cooling water test system.

[0022] Preferably, in the establishment of the simulation model in the second step, the series-parallel simplification is carried out for the preprocessing of the three-dimensional model, and the data processing method for the operating parameters is to take the average value.

[0023] The technical effects and advantages of the present invention:

[0024] Through the design of the test system and simulation method, the present invention includes a circulation loop and a purification loop in the system composition. This test system can not only simulate the cooling water system and the purification system, but also conduct ion exchanger experiments and abnormal condition control experiments, and can provide data for the operation and maintenance of the cooling water system, which is of great significance. Then, through the design of the simulation method, digital twin simulation is carried out. Through the experimental data of the system, the simulation operation can be completed. With the preview of this test system, the reliability of the cooling water system can be improved. Brief Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall composition of the system of the present invention.

[0026] Figure 2 For the present invention Figure 1 It is a schematic diagram of the structural connection of area A in the present invention.

[0027] Figure 3 It is an operation flow chart of the simulation method of the present invention.

[0028] In the figure: 1. water tank; 2. canned motor pump; 3. first sensor group; 4. simulation target; 5. second sensor group; 6. first filter; 7. first ion exchanger; 8. third sensor group; 9. second filter; 10. second ion exchanger; 11. fourth sensor group; 12. first valve; 13. second valve; 14. first isolation valve; 15. isolation valve group; 16. third valve; 17. fourth valve; 18. first filter valve; 19. first ion exchange valve; 20. second filter valve; 21. second ion exchange valve; 22. first make-up valve; 23. second make-up valve; 24. first sampling valve; 25. second sampling valve; 26. first drain valve; 27. second drain valve; 28. nitrogen cylinder; 29. nitrogen valve; 30. nitrogen circuit sensor; 31. fifth valve; 32. sixth valve; 33. seventh valve; 34. eighth valve. Specific implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] The present invention provides a Figure 1-2 neutron source target cooling water test system as shown, including a circulation loop and a purification loop, and the purification water path is arranged on the circulation path of the circulation loop;

[0031] The circulation loop sequentially includes a water tank 1, a canned motor pump 2, a first sensor group 3 and a simulation loop along the water circulation direction, and the simulation loop is connected in parallel between the connection paths of the circulation loop;

[0032] Specifically, a first valve 12 is arranged between the connection path of the water tank 1 and the canned motor pump 2, a second valve 13 is arranged at the water inlet end of the water tank 1, and a first isolation valve 14 is arranged at the discharge end of the simulation target 4.

[0033] The simulation loop includes a simulation target 4 and a second sensor group 5, and the second sensor group 5 is distributed between the input end and the output end of the simulation target 4;

[0034] It should be noted that the cooling water test system of this solution is provided with a flange bolt connection. The water inlet of the canned motor pump 2 is connected to the first valve 12 through a flange bolt connection structure, and the water outlet of the canned motor pump 2 is connected to the simulation loop through a flange bolt connection structure; the flange bolt connection is a raised surface structure, and the flange bolt connection includes a pair of raised surface flanges, gaskets and bolt groups.

[0035] The purification circuit includes a first purification group, a second purification group, and an isolation valve group 15. The first purification group and the second purification group are connected in series with each other, and the isolation valve group 15 is interposed between the conduction connection points of the first purification group and the second purification group;

[0036] The first purification group includes a first filter 6, a first ion exchanger 7, and a third sensor group 8. The first filter 6 and the first ion exchanger 7 are connected in series;

[0037] It should be noted that a filter generally refers to a device or apparatus used to separate solid particles or impurities in a liquid. They can adopt different working principles and materials and are used for filtration and separation operations in multiple fields. Common types of filters include: Mechanical filters: Usually intercept solid particles through physical isolation, such as sieves, filter papers, and filter cloths. Oil filters: Used to remove impurities in engine oil to keep the oil clean and extend the engine life. Air filters: Used in air conditioners, ventilation systems, and automotive engines to remove particles and pollutants in the air. Water filters: Used to purify drinking water, industrial water, or swimming pool water, usually adopting technologies such as activated carbon, ceramics, or reverse osmosis. Flue gas filters: Used to remove solid and liquid particles generated during the combustion process. Biological filters: Used to remove microorganisms and organic pollutants in the air or liquid. Since the filter in this solution is used in the water circulation, the type adopted is a mechanical filter or a water filter.

[0038] An ion exchanger is a device used to remove ionic impurities in water and is commonly used in water treatment and wastewater treatment processes. They usually contain resins or other materials that selectively adsorb and release ions. When water passes through the ion exchanger, the cations and anions in it will exchange positions with other ions on the resin, thereby adjusting the ion concentration in the water.

[0039] The second purification group includes a second filter 9, a second ion exchanger 10, and a fourth sensor group 11. The second filter 9 and the second ion exchanger 10 are connected in series.

[0040] Specifically, a third valve 16 is provided between the first filter 6 and the drainage end of the circulating water path, a fourth valve 17 is provided between the second filter 9 and the water tank 1, a first filter valve 18 is provided at the drainage end of the first filter 6, a first ion exchange valve 19 is provided at the drainage end of the first ion exchanger 7, a second filter valve 20 is provided at the drainage end of the second filter 9, and a second ion exchange valve 21 is provided at the drainage end of the second ion exchanger 10.

[0041] Specifically, it further includes a first resin replenishment port and a second resin replenishment port; the first resin replenishment port is communicated with the outlet end of the first ion exchanger 7, and a first replenishment valve 22 is arranged at the first resin replenishment port; the second resin replenishment port is communicated with the outlet end of the second ion exchanger 10, and a second replenishment valve 23 is arranged at the second resin replenishment port.

[0042] It should be noted that the resin replenishment port is an inlet for adding fresh resin to the ion exchanger. Through the replenishment port, new resin can be gradually added to the exchanger to replace the saturated resin. This can ensure the continuous operation and stability of the ion exchanger. In the ion exchanger, the replenishment of resin usually needs to be carried out regularly, and the specific frequency depends on the type, use and operating conditions of the resin. The ion exchanger needs a resin replenishment port because during the ion exchange process, ions in the water will gradually adsorb onto the resin, while the original ions on the resin will be released into the water. Over time, the resin becomes saturated and can no longer adsorb more ions, at which point resin replenishment or regeneration is required.

[0043] Specifically, it further includes a first sampling point and a second sampling point. The first sampling point is communicated with the inlet end of the first purification group, and a first sampling valve 24 is arranged at the first sampling point; the second sampling point is communicated with the outlet end of the second purification group, and a second sampling valve 25 is arranged at the fourth sampling point.

[0044] Specifically, it further includes a first drain port and a second drain port. The first drain port is arranged in the circulation loop, and a first drain valve 26 is arranged at the first drain port; the second drain port is arranged in the purification loop, and a second drain valve 27 is arranged at the second drain port. A fifth valve 31 is connected in series between the discharge end of the first filter 6 and the second drain port; a sixth valve 32 is connected in series between the discharge end of the first ion exchanger 7 and the second drain port; a seventh valve 33 is connected in series between the discharge end of the second filter 9 and the second drain port; an eighth valve 34 is connected in series between the discharge end of the second ion exchanger 10 and the second drain port.

[0045] Specifically, it further includes a nitrogen circuit, and the nitrogen circuit includes a nitrogen cylinder 28. The nitrogen cylinder 28 is arranged at the air inlet end of the water tank 1, and a nitrogen valve 29 and a nitrogen circuit sensor 30 are sequentially arranged between the connection path of the nitrogen cylinder 28 and the water tank 1.

[0046] Further, the first sensing group 3 includes a pressure sensor, a temperature sensor and a flow rate sensor; the second sensor group 5 includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors; the third sensing group 8 includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors; the fourth sensing group 11 includes a plurality of pressure sensors, a plurality of temperature sensors and a plurality of flow rate sensors.

[0047] It should be noted that pressure sensors are used to measure the pressure of gases or liquids. They can convert pressure into electrical signals, reflecting the magnitude of the pressure of the object being measured.

[0048] Temperature sensors are used to measure the temperature of the environment, objects, or fluids. They can achieve temperature measurement through various working principles (such as thermocouples, thermistors, infrared, etc.), and convert the temperature into an electrical signal for output. Temperature sensors are important in many applications, such as thermal management, meteorological observation, temperature control, etc.

[0049] Flow velocity sensors are used to measure the flow velocity or volumetric flow rate of fluids. They can achieve flow velocity measurement through physical measurement principles (such as turbines, ultrasonic waves, thermal expansion, etc.), and convert the results into corresponding electrical signals.

[0050] The present invention provides a digital twin simulation method for a neutron source target cooling water test system as Figure 3 shown, characterized in that a test system including any one of claims 1-8 is adopted, and the simulation method includes the following steps:

[0051] In the first step, data acquisition is carried out. The three-dimensional structure of the neutron source target cooling water test system is measured to obtain the structural data of the system; by pre-recording the operation data of the neutron source target cooling water test system, the system operation parameters are collected; the operation parameters at least include the flow rate of the circulation loop, the pressure of the circulation loop, the flow velocity of the circulation loop, the flow rate of the purification loop, the pressure of the purification loop, and the flow velocity of the purification loop.

[0052] In the second step, model establishment is carried out. Using the system structure data obtained in the first step, a three-dimensional model of the neutron source target cooling water test system is established; using the system operation parameters and system structure data obtained in the first step, a simulation model of the neutron source target cooling water test system is established. The three-dimensional model is established based on 3D software such as CAD, and the simulation model is established based on hydraulic system simulation software.

[0053] Specifically, in the establishment of the simulation model in the second step, the series-parallel simplification is carried out for the preprocessing of the three-dimensional model, and the data processing method for the operation parameters is to take the average value.

[0054] In the third step, simulation processing is carried out. Based on the three-dimensional model and simulation model established in the second step, the simulation running time and the simulation model are set in the computer simulation software. The simulation model uses the simplest model of the computer simulation software.

[0055] It should be noted that the computer simulation software for model simulation includes:

[0056] MATLAB / Simulink: MATLAB is a powerful mathematical computing software, and Simulink is its attached modeling and simulation tool, which is widely used in fields such as control systems, signal processing, and communication.

[0057] Ansys: Ansys provides an engineering simulation software package that covers multiple fields such as structural analysis, fluid mechanics, and electromagnetic fields, and is suitable for engineering design and analysis.

[0058] COMSOL Multiphysics: COMSOL is a software platform for multiphysics simulation, supporting modeling and simulation in multiple fields, including electromagnetic fields, heat conduction, and fluid mechanics.

[0059] SolidWorks: SolidWorks is a three-dimensional computer-aided design (CAD) software, which also provides simulation functions and can be used for structural, fluid, and thermal analysis.

[0060] SimScale: SimScale is a cloud-based engineering simulation platform that provides services such as finite element analysis, fluid dynamics, and thermal simulation.

[0061] OpenFOAM: OpenFOAM is an open-source computational fluid dynamics (CFD) software package, suitable for simulation calculations of fluid flow and heat transfer.

[0062] Dymola: Dymola is a model-based multi-domain simulation software, suitable for system-level modeling and simulation, and is used in fields such as control systems and vehicle dynamics.

[0063] The computer software adopted in the present invention is Ansys or COMSOL.

[0064] Fourthly, perform simulation verification. Compare the simulation result data obtained by running the simulation in the third step with the operating parameters collected in the first step to obtain the digital twin simulation data of the neutron source target cooling water test system.

[0065] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Neutron source target cooling water test system, It is characterized in that It includes a circulation loop and a purification loop, wherein the purification water circuit is arranged on the circulation path of the circulation loop; The circulation loop comprises a water tank (1), a shielded pump (2), a first sensor group (3) and a simulation loop in sequence along the circulation direction of water, and the simulation loop is connected in parallel between the connection paths of the circulation loop; The simulation loop comprises a simulation target (4) and a second sensor group (5), wherein the second sensor group (5) is distributed between an input end and an output end of the simulation target (4); The purification circuit comprises a first purification group, a second purification group and an isolation valve group (15), the first purification group and the second purification group are connected in series, and the isolation valve group (15) is interspersed between the conductive connection of the first purification group and the second purification group; The first purification group comprises a first filter (6), a first ion exchanger (7) and a third sensor group (8), wherein the first filter (6) and the first ion exchanger (7) are connected in series; The second purification group comprises a second filter (9), a second ion exchanger (10) and a fourth sensor group (11), wherein the second filter (9) and the second ion exchanger (10) are connected in series.

2. The neutron source target cooling water test system according to claim 1, It is characterized in that A first valve (12) is provided between the connection passage between the water tank (1) and the shielded pump (2), a second valve (13) is provided at the water inlet end of the water tank (1), and a first isolation valve (14) is provided at the discharge end of the simulation target (4).

3. The neutron source target cooling water test system according to claim 1, It is characterized in that A third valve (16) is provided between the first filter (6) and the drainage end of the circulating water circuit, a fourth valve (17) is provided between the second filter (9) and the water tank (1), a first filter valve (18) is provided at the drainage end of the first filter (6), a first ion exchange valve (19) is provided at the drainage end of the first ion exchanger (7), a second filter valve (20) is provided at the drainage end of the second filter (9), and a second ion exchange valve (21) is provided at the drainage end of the second ion exchanger (10).

4. The neutron source target cooling water test system according to claim 3, It is characterized in that It also includes a first resin replenishment port and a second resin replenishment port; the first resin replenishment port is connected to the outlet end of the first ion exchanger (7), and the first resin replenishment port is provided with a first replenishment valve (22); the second resin replenishment port is connected to the outlet end of the second ion exchanger (10), and the second resin replenishment port is provided with a second replenishment valve (23).

5. The neutron source target cooling water test system according to claim 1, It is characterized in that It also includes a first sampling point and a second sampling point, wherein the first sampling point is connected to the inlet end of the first purification group, the first sampling point is provided with a first sampling valve (24), the second sampling point is connected to the outlet end of the second purification group, and the fourth sampling point is provided with a second sampling valve (25).

6. The neutron source target cooling water test system according to claim 1, It is characterized in that The invention also comprises a first drain port and a second drain port, wherein the first drain port is arranged in a circulation loop and is provided with a first drain valve (26), the second drain port is arranged in a purification loop and is provided with a second drain valve (27), a fifth valve (31) is connected in series between the discharge end of the first filter (6) and the second drain port, a sixth valve (32) is connected in series between the discharge end of the first ion exchanger (7) and the second drain port, a seventh valve (33) is connected in series between the discharge end of the second filter (9) and the second drain port, and an eighth valve (34) is connected in series between the discharge end of the second ion exchanger (10) and the second drain port.

7. The neutron source target cooling water test system according to claim 1, It is characterized in that It also comprises a nitrogen circuit, the nitrogen circuit comprising a nitrogen bottle (28), the nitrogen bottle (28) being arranged at the air inlet end of the water tank (1), and a nitrogen valve (29) and a nitrogen circuit sensor (30) being arranged in sequence between the connection passage between the nitrogen bottle (28) and the water tank (1).

8. The neutron source target cooling water test system according to claim 1, It is characterized in that The first sensor group (3) includes a pressure sensor, a temperature sensor and a flow rate sensor, the second sensor group (5) includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors, the third sensor group (8) includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors, and the fourth sensor group (11) includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors.

9. Digital twin simulation method for neutron source target cooling water test system, It is characterized in that Using the test system according to any one of claims 1 to 8, the simulation method comprises the following steps: The first step is to acquire data, measure the three-dimensional structure of the neutron source target cooling water test system, and acquire the structural data of the system; collect the system operation parameters by pre-recording the operation data of the neutron source target cooling water test system; the operation parameters at least include the flow rate of the circulation loop, the pressure of the circulation loop, the flow rate of the circulation loop, the flow rate of the purification loop, the pressure of the purification loop, and the flow rate of the purification loop; The second step is to establish a model, using the system structure data obtained in the first step to establish a three-dimensional model of the neutron source target cooling water test system; using the system operating parameters and system structure data obtained in the first step to establish a simulation model of the neutron source target cooling water test system, the three-dimensional model is established based on three-dimensional software such as CAD, and the simulation model is established based on hydraulic system simulation software; The third step is to perform simulation processing, based on the three-dimensional model and simulation model established in the second step, set the simulation running time and simulation model in the computer simulation software, and the simulation model uses the simplest model of the computer simulation software; The fourth step is to conduct simulation verification. By running the simulation in the third step to obtain the simulation result data, the data is compared with the operating parameters collected in the first step to obtain the digital twin simulation data of the neutron source target cooling water test system.

10. The digital twin simulation method of the neutron source target cooling water test system according to claim 9, It is characterized in that In the second step of establishing the simulation model, the three-dimensional model preprocessing is simplified in series and parallel, and the data processing method for the operating parameters is to take the average.

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