Containment comprehensive experiment system and containment comprehensive experiment method

Abstract

The invention relates to a containment comprehensive experiment system and a containment comprehensive experiment method. The containment comprehensive experiment system comprises a main equipment simulation unit, a mass energy release simulation unit and a control unit, the mass energy release simulation unit comprises a high-energy spraying pipeline, a steam injection pipeline and a water injection pipeline; the high-energy blowing pipeline, the steam injection pipeline and the water injection pipeline are respectively communicated with the main equipment simulation unit; and the control unit is used for respectively controlling the opening, closing and flow of the high-energy blowing pipeline, the steam injection pipeline and the water injection pipeline. According to the invention, the integrality and accuracy of experimental simulation can be improved.

Description

Technical Field

[0001] The present application relates to the field of nuclear power technology, and more specifically, to a containment comprehensive experimental system and a containment comprehensive experimental method. Background Art

[0002] The containment system of a nuclear power plant is the third safety barrier, and is used to achieve safety functions such as radioactive containment and containment heat extraction under accident conditions. In the current pressurized water reactor design, there is a design concept that uses a series of passive designs to achieve functions such as containment heat extraction and containment pressure suppression of the reactor. On the one hand, this design method can simplify the system configuration, and at the same time, through passive design, it can improve the reliability of the commissioning of safety functions such as containment heat extraction and containment pressure suppression after an accident, and reduce the probability of safety function failure caused by active single failures of the system and equipment.

[0003] Whether such a design concept can be put into practical use requires a series of verification experiments to verify the reliability of the design. Currently, there is an experimental device that can simulate the mass energy release conditions of an experimental reactor, but its operating condition simulation is too simple and the process configuration is relatively simple, making it difficult to accurately verify the experiment. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a comprehensive containment experiment system and a comprehensive containment experiment method in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] Construct a comprehensive containment experiment system, including:

[0007] Main equipment simulation unit;

[0008] A mass-energy release simulation unit, the mass-energy release simulation unit comprising a high-energy blowdown pipeline, a steam injection pipeline, and a water injection pipeline; the high-energy blowdown pipeline, the steam injection pipeline, and the water injection pipeline are respectively connected to the main equipment simulation unit; and

[0009] The control unit controls the switches and flows of the high-energy spraying pipeline, the steam injection pipeline, and the water injection pipeline respectively.

[0010] In some embodiments, the main equipment simulation unit includes a containment simulation body, a main equipment cavity simulation body, a pressure suppression pool simulation body and a pressure suppression tube simulation body; the containment simulation body is connected to the main equipment cavity simulation body; the main equipment cavity simulation body is connected to the pressure suppression pool simulation body through the pressure suppression tube simulation body.

[0011] In some embodiments, the high-energy blowdown pipeline is respectively connected to the containment simulation body and the main equipment cavity simulation body, and / or the steam injection pipeline is respectively connected to the containment simulation body and the main equipment cavity simulation body, and / or the water injection pipeline is respectively connected to the containment simulation body and the main equipment cavity simulation body.

[0012] In some embodiments, the high-energy spraying pipeline includes a high-energy spraying simulation body, a first high-energy spraying pipe and a second high-energy spraying pipe; the two ends of the first high-energy spraying pipe are respectively connected to the high-energy spraying simulation body and the containment simulation body; the two ends of the second high-energy spraying pipeline are respectively connected to the high-energy spraying simulation body and the main equipment cavity simulation body.

[0013] In some embodiments, the steam injection pipeline includes a steam injection simulation body, a first steam injection pipe and a second steam injection pipe; the two ends of the first steam injection pipe are respectively connected to the steam injection simulation body and the containment simulation body; the two ends of the second steam injection pipe are respectively connected to the steam injection simulation body and the main equipment cavity simulation body.

[0014] In some embodiments, the water injection pipeline includes a water injection simulation body, a first water injection pipe and a second water injection pipe; the two ends of the first water injection pipe are respectively connected to the water injection simulation body and the containment simulation body; the two ends of the second water injection pipe are respectively connected to the water injection simulation body and the main equipment cavity simulation body.

[0015] In some embodiments, the opening degree and / or position of the outlet ends of the high-energy blowing pipeline, the steam injection pipeline, and the water injection pipeline can be adjusted.

[0016] In some embodiments, the outlet ends of the high-energy blowdown pipeline, the steam injection pipeline, and the water injection pipeline are adjustably connected to the main equipment simulation unit.

[0017] In some embodiments, each pipeline of the mass-energy release simulation unit is provided with an isolation valve and / or a regulating valve for controlling the resistance coefficient of the fluid in the pipeline.

[0018] In some embodiments, the mass-energy release simulation unit further includes a steam exhaust pipeline; the steam exhaust pipeline is electrically connected to the control unit, and the steam injection pipeline discharges steam out of the system through the steam exhaust pipeline.

[0019] In some embodiments, the containment comprehensive experimental system further comprises a containment heat extraction simulation unit; the containment heat extraction simulation unit is connected to the main equipment simulation unit and is electrically connected to the control unit;

[0020] And / or, the containment integrated experimental system further includes an auxiliary loop simulation unit; the auxiliary loop simulation unit includes a compressed air injection pipeline and a hydrogen injection pipeline respectively connected to the main equipment simulation unit.

[0021] In some embodiments, the main equipment simulation unit includes a containment simulation body, a main equipment cavity simulation body and a suppression water pool simulation body which are interconnected; the main equipment cavity simulation body is connected between the containment simulation body and the suppression water pool simulation body.

[0022] A containment comprehensive test method is constructed and applied to the containment comprehensive test system described in any of the above embodiments. The containment comprehensive test method comprises the following steps:

[0023] S1. Determine the working conditions to be simulated in the experiment;

[0024] S21. If the working condition to be simulated is a pressurizer breach accident condition, then within a first time period, the high-energy blowdown pipeline is controlled to act on the main equipment simulation unit; and after the first time period, the high-energy blowdown pipeline is controlled to be closed, and the steam injection pipeline and the water injection pipeline are controlled to act on the main equipment simulation unit;

[0025] S22, if the working condition to be simulated is a small breach accident condition of a primary circuit, controlling the steam injection pipeline and the water injection pipeline to act on the main equipment simulation unit;

[0026] S3. Obtain experimental data.

[0027] In some embodiments, step S21 includes:

[0028] If the working condition to be simulated is a pressurizer breach accident condition, then within the first time period, the high-energy blowdown pipeline is controlled to inject g-mass saturated water into the main equipment simulation unit; and after the first time period, the high-energy blowdown pipeline is controlled to be closed;

[0029] The potential energy release process after the first time period is divided into at least three time periods. In different time periods, the steam injection pipeline and the water injection pipeline are respectively controlled to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit.

[0030] In some embodiments, step S22 includes:

[0031] If the operating condition to be simulated is a small breach accident condition in a single circuit, the potential energy release process is divided into at least three time periods, and the steam injection pipeline and the water injection pipeline are controlled in different time periods to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit.

[0032] In some embodiments, between step S1, step S21 and step S22, step S0 is further included:

[0033] According to the working condition to be simulated, adjusting the initial water temperature in the simulation unit of the main equipment;

[0034] And / or, according to the working condition to be simulated, adjusting the initial liquid level value in the simulation unit of the main equipment.

[0035] The implementation of this application has at least the following beneficial effects:

[0036] This application sets up high-energy blowdown pipelines, steam injection pipelines and water injection pipelines, and cooperates with the control of the control unit to realize multiple combinations such as single operation, two-by-two operation, and three-by-three operation, so as to inject saturated water and / or steam into the main equipment simulation unit. This setting method can realize injection simulation under different working conditions, improve the integrity of the experimental simulation of the containment comprehensive experimental system; and can also obtain a more accurate mass-energy release time curve, thereby ensuring the accuracy of the experimental data finally obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0038] Figure 1 is a schematic diagram of a comprehensive containment experiment system in one embodiment of the present application;

[0039] Figure 2 yes Figure 1 A schematic diagram of a master device simulation unit in FIG.

[0040] Figure 3 yes Figure 1 Schematic diagram of the mass-energy release simulation unit in ;

[0041] Figure 4 is a flow chart of a comprehensive containment experiment method in one embodiment of the present application;

[0042] Figure 5 is a graph showing the relationship between the mass injection amount and time under a simulated pressurizer spray pipe rupture accident condition in one embodiment of the present application;

[0043] Figure 6is a graph showing the relationship between the amount of energy injected and time under a simulated pressurizer spray pipe rupture accident condition in one embodiment of the present application;

[0044] Figure 7 is a graph showing the relationship between the mass injection amount and time under a simulated pressurizer surge pipe rupture accident condition in one embodiment of the present application;

[0045] Figure 8 is a graph showing the relationship between the amount of energy injected and time under a simulated pressurizer surge tube rupture accident condition in one embodiment of the present application;

[0046] Fig. 9 is a graph showing the relationship between the mass injection amount and time under a simulated primary circuit small breach accident condition in one embodiment of the present application;

[0047] Fig.10 This is a graph showing the relationship between the amount of energy injected and time under a simulated small breach accident condition in a primary circuit in one embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings or the orientations or positional relationships in which the products of the present application are usually placed when used. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] Figures 1 to 3 A comprehensive containment experiment system 1 in one embodiment of the present application is shown, which can simulate various operating conditions of the reactor to realize the experimental verification of the overall performance of the reactor under various operating conditions. The comprehensive containment experiment system 1 may include a main equipment simulation unit 10, a mass-energy release simulation unit 20 and a control unit (not shown in the figure). Among them, the main equipment simulation unit 10 is used to simulate the main equipment of the reactor. The mass-energy release simulation unit 20 is connected to the main equipment simulation unit 10, and is used to simulate various accident conditions and act on the main equipment simulation unit 10. The control unit is electrically connected to the mass-energy release simulation unit 20, and is used to control the switch, operation, etc. of the mass-energy release simulation unit 20 to realize the simulation of various operating conditions of the mass-energy release simulation unit 20.

[0054] Through the coordination of the main equipment simulation unit 10 and the mass-energy release simulation unit 20, as well as the control of the mass-energy release simulation unit 20 by the control unit, experiments can be conducted on the response of the main equipment under various operating conditions to verify the reliability of the containment heat extraction and containment pressure suppression functions of the main equipment under various operating conditions.

[0055] Among them, Figure 3As shown, the mass-energy release simulation unit 20 may include a high-energy spraying pipeline 21, a steam injection pipeline 22, and a water injection pipeline 23. The high-energy spraying pipeline 21, the steam injection pipeline 22, and the water injection pipeline 23 are respectively connected to the main equipment simulation unit 10, and are respectively electrically connected to the control unit. The control unit can control the switch, flow rate, etc. of the high-energy spraying pipeline 21, the steam injection pipeline 22, and the water injection pipeline 23 respectively, so as to control the individual operation of each pipeline respectively. The high-energy spraying pipeline 21 can spray saturated water with instantaneous high energy into the main equipment simulation unit 10 according to the requirements of the simulation experiment, and can realize the simulation of free mass-energy release conditions in a short period of time in different LOCA (loss of coolant) accidents. The water injection pipeline 23 can continuously inject saturated water into the main equipment simulation unit 10. The steam injection pipeline 22 can continuously inject steam into the main equipment simulation unit 10.

[0056] It should be understood that there are currently related technologies that use steam generating equipment such as boilers to simulate accident conditions. During the simulation, mass and energy will be released (steam will be injected) for a period of time, and then the simulation of the accident condition will be completed by observing the mass and energy release time curve to obtain relevant data.

[0057] In the actual reactor accident process, there are many conditions for different accident conditions, such as short-term high-mass energy release, medium- and long-term medium / low-mass energy release, etc. After a breach accident occurs, there may be an instantaneous, high-energy injection of high-pressure saturated water in the initial stage, and a continuous injection of a gas-liquid two-phase (steam and saturated water) mixture in the later stage of the accident. There may also be a long-term injection of a gas-liquid two-phase mixture. In the whole process, the amount of steam and saturated water injected will not only affect the overall energy (or heat) injected, but also affect the overall quality and pressure parameters of the injection.

[0058] Although the related technology can simulate the working condition by steam injection, the working condition that can be simulated by only using steam is relatively single, and it is difficult to simulate the precise injection of the gas-liquid two-phase mixture.

[0059] At the same time, the mass-energy release time curve obtained by simulating only with steam injection is difficult to be consistent with the actual situation. When simulating with steam injection, the data accuracy of the energy (or heat) injected under accident conditions can be achieved by controlling the amount of steam injected. However, other parameters besides energy (or heat) are difficult to be consistent with the parameters generated by the actual gas-liquid two-phase mixture.

[0060] For example, for a certain breach accident, under the premise that the overall injection volume reaches the target value of energy (or heat) injection under the operating condition, the overall injection quality of the accident simulation through steam injection and integral curve is difficult to achieve consistency compared with the actual situation, which will also lead to deviations in the final experimental results, and then cause deviations in the verification results of the containment heat extraction function and the containment pressure suppression function.

[0061] The present application can inject saturated water and / or steam into the main equipment simulation unit 10 by setting a high-energy blowdown pipeline 21, a steam injection pipeline 22, and a water injection pipeline 23. By electrically connecting it to the control unit, the injection flow rate and duration can be accurately controlled. Such a setting can simulate the situation under the actual accident working conditions, and a more accurate mass-energy release time curve can be obtained, thereby ensuring the accuracy of the experimental data finally obtained.

[0062] It should be understood that the accident conditions of the reactor can be divided into various conditions such as small breach conditions, medium breach conditions, large breach conditions, LOCA conditions, etc. Under different accident conditions, leakage of different degrees and different proportions of gas and liquid phases will occur into the main equipment. The present application sets a high-energy blowdown pipeline 21, a steam injection pipeline 22, and a water injection pipeline 23. Through a variety of combinations such as single operation, two-by-two cooperation operation, and three-way cooperation operation, the injection simulation under different conditions can be realized, thereby improving the integrity and accuracy of the experimental simulation of the containment comprehensive experimental system 1.

[0063] It should be understood that the parameters of the saturated water injection can be consistent with the parameters of the injected medium under the simulated prototype accident condition. For example, under a certain type of accident condition of a certain reactor type, the high-energy blowdown pipeline 21 can inject 15.5 MPa saturated water.

[0064] The aforementioned "simulated prototype" can be understood as the prototype of the containment (main equipment) simulated by the containment integrated experimental system 1. For example, when the integrated and compact pressurized water reactor type needs to be experimentally verified, the simulated prototype is the main equipment of the integrated and compact pressurized water reactor.

[0065] The medium injection amount of each pipeline in the mass-energy release simulation unit 20 can be understood as the "simulated injection amount", that is, the target amount that needs to be injected by the simulated prototype under the simulated working condition is converted according to a specific ratio to obtain the actual amount injected through the pipeline during the simulation process.

[0066] It should be understood that the main equipment simulation unit 10 can be produced by reducing the size parameters of the simulated prototype in a certain proportion. Correspondingly, during the simulation experiment, the simulated injection amount of the saturated water and steam can also be obtained by proportionally reducing the target amount that needs to be injected by the simulated prototype under the simulated working conditions according to the proportion. Such a setting can improve the consistency between the parameters responded by the main equipment simulation unit 10 under the simulated working conditions and the simulated prototype, and improve the accuracy of the experiment. The control of the simulated injection amount can be achieved by the control unit.

[0067] like Figure 2 As shown, in some embodiments, the main equipment simulation unit 10 may include a containment shell simulation body 11, a main equipment cavity simulation body 12, a suppression water pool simulation body 13 and a suppression tube simulation body 14. Among them, the containment shell simulation body 11 realizes the simulation of the containment shell prototype in the simulated prototype. The main equipment cavity simulation body 12 realizes the simulation of the main equipment cavity prototype in the simulated prototype. The suppression water pool simulation body 13 realizes the simulation of the suppression water pool prototype in the simulated prototype. The suppression tube simulation body 14 realizes the simulation of the suppression tube prototype in the simulation prototype.

[0068] Corresponding to the position and connection relationship between the various devices in the simulated prototype, the containment shell simulation body 11 can be connected to the main equipment cavity simulation body 12 through a through hole. The main equipment cavity simulation body 12 is connected to the suppression pool simulation body 13 through the suppression pipe simulation body 14. The suppression pool simulation body 13 can include a suppression pool water space 131 and a suppression pool gas space 132 to be consistent with the simulated prototype.

[0069] It should be understood that there are relevant experimental devices to simulate the main equipment of the reactor. However, the simulation body constructed by it is an integrated structure. In the production process, it is generally designed according to the most enveloping data. Therefore, based on the modeling criteria of various aspects such as the mass-energy release flow field distribution and the suppression characteristic response, the smallest reduction ratio is selected from multiple proportional sizes, and the overall proportional reduction output is reduced. Such a setting will make the overall size of the main equipment simulation unit 10 larger, requiring greater production costs.

[0070] The present application divides the main equipment simulation unit 10 into several independent simulation bodies, so that the several simulation bodies can be modeled and manufactured separately. Based on the modeling criteria of various aspects such as the mass-energy release flow field distribution and the suppression characteristic response, the structure and capacity are determined in a targeted manner, and the maximum reduction ratio is selected to greatly improve the cost of the experimental platform research and development and the demand for site resources.

[0071] For simulation bodies reduced in different proportions, during the process of working condition simulation, for the simulation working conditions involving the relevant simulation bodies, the key simulation data involved can be modeled and reduced according to the reduction ratio of the relevant simulation body. Each simulation body of the main device simulation unit 10 can also be obtained by equal reduction. No specific limitation is made here.

[0072] It should be understood that there are related experimental devices that only model the containment of the simulated prototype. Such a setting makes it difficult to verify the pressure suppression performance of the containment through simulation experiments.

[0073] By setting up the containment simulation body 11, the main equipment cavity simulation body 12, the pressure suppression pool simulation body 13 and the pressure suppression tube simulation body 14, the containment comprehensive experimental system 1 can verify the heat removal performance of the containment through simulation experiments, and verify the pressure suppression performance of the containment, thereby improving the integrity of the verification of the containment related systems.

[0074] like Figure 3 As shown, in some embodiments, the high energy blowdown pipeline 21 can be respectively connected to the containment simulation body 11 and the main equipment cavity simulation body 12. The steam injection pipeline 22 can also be respectively connected to the containment simulation body 11 and the main equipment cavity simulation body 12. The water injection pipeline 23 can also be respectively connected to the containment simulation body 11 and the main equipment cavity simulation body 12.

[0075] It should be understood that different breach accidents can occur on the containment or on the main equipment cavity. By connecting each pipeline to the containment simulation body 11 and the main equipment cavity simulation body 12 respectively, the present application can simulate different breach accident conditions and further improve the integrity of the experimental simulation of the containment comprehensive experimental system 1.

[0076] In some embodiments, the high-energy spraying pipeline 21 may include a high-energy spraying simulation body 211, a first high-energy spraying pipeline 212, and a second high-energy spraying pipeline 213. The two ends of the first high-energy spraying pipeline 212 may be respectively connected to the high-energy spraying simulation body 211 and the containment simulation body 11. The two ends of the second high-energy spraying pipeline 213 may be respectively connected to the high-energy spraying simulation body 211 and the main equipment cavity simulation body 12.

[0077] The first high-energy spraying pipeline 212 and the second high-energy spraying pipeline 213 may be directly connected to the high-energy spraying simulation body 211, or both may be connected to the high-energy spraying simulation body 211 through the same main pipeline, which is not specifically limited here.

[0078] It should be understood that the high-energy spray simulation body 211 can be realized by using existing high-pressure, high-flow liquid spraying equipment.

[0079] In some embodiments, the high-energy spraying pipeline 21 may also be provided with at least one heater 80 , which is disposed on the high-energy spraying simulation body 211 to control the temperature of the high-energy spraying medium.

[0080] In some embodiments, the steam injection pipeline 22 may include a steam injection simulation body 221, a first steam injection pipeline 222, and a second steam injection pipeline 223. The two ends of the first steam injection pipeline 222 are respectively connected to the steam injection simulation body 221 and the containment simulation body 11. The two ends of the second steam injection pipeline 223 are respectively connected to the steam injection simulation body 221 and the main equipment cavity simulation body 12.

[0081] The first steam injection pipeline 222 and the second steam injection pipeline 223 may be directly connected to the steam injection simulation body 221, or both may be connected to the steam injection simulation body 221 through the same main pipeline, which is not specifically limited here.

[0082] It should be understood that the steam injection simulation body 221 can be implemented by using existing equipment such as steam boilers, steam from power plants to steam injection tanks, etc.

[0083] In some embodiments, at least one heater 80 may be further provided on the steam injection simulation body 221 , which may be electrically connected to the control unit to heat the water in the steam injection simulation body 221 to form steam.

[0084] In some embodiments, the steam injection line 22 may further include a steam-water separator 225, which may control the dryness of the steam.

[0085] It should be understood that, according to the above content, if you want to achieve the effect of accurate simulation, you need to ensure that the amount of water and steam injected are consistent with the actual situation as much as possible, so as to achieve the simulation of injection enthalpy and other parameters such as injection quality. By setting the steam-water separator 225, the steam dryness output by the steam injection pipeline 22 can be effectively controlled, and the water content of the output can be reduced as much as possible, so as to achieve accurate control of the amount of steam injection and the amount of water injection.

[0086] In some embodiments, the steam injection pipeline 22 may include a steam injection main pipeline 224, and the steam-water separator 225 may be disposed on the steam injection main pipeline 224. The first steam injection pipeline 222 and the second steam injection pipeline 223 may be connected to the steam injection simulation body 221 through the steam injection main pipeline 224, respectively, so as to control the steam quality in the two steam injection pipelines through a steam-water separator 225, while reducing the number of connection ports on the steam injection simulation body 221.

[0087] In some other optional embodiments, the steam injection pipeline 22 may also be provided with two steam-water separators 225 , which are respectively provided on the first steam injection pipeline 222 and the second steam injection pipeline 223 .

[0088] It should be understood that since both the high-energy blowdown pipeline 21 and the water injection pipeline 23 can inject water media with different parameter values, the injection of water media can achieve a wide range of coverage. To ensure that steam injection can achieve a wide range of coverage, the steam injection main pipeline 224 can include two main pipe sections 2241 and two branch pipe sections 2242. The two branch pipe sections 2242 are connected in parallel between the two main pipe sections 2241, and are used to control the delivery of large and small flow rates of steam, respectively, to achieve precise regulation of steam under different flow ranges.

[0089] The first steam injection pipeline 222 and the second steam injection pipeline 223 may be disposed on the steam injection main pipeline 224 downstream of the two branch pipe sections 2242 .

[0090] In some embodiments, the steam injection pipeline 22 may further include a steam direct injection pipeline 226, one end of which is connected to the containment simulation body 11, and the field section is connected to the steam injection main pipeline 224. The connection position of the steam direct injection pipeline 226 on the steam injection main pipeline 224 may be located downstream of the steam-water separator 225 and upstream of the two branch pipe sections 2242.

[0091] Such a setting can avoid the influence of the branch pipe section 2242 on the flow control and perform direct steam injection. Through the cooperation of the direct steam injection pipeline 226 and the two parallel branch pipe sections 2242, the flow requirements of various steam simulation conditions can be met, and the rapid adjustment of steam flow across orders of magnitude can be achieved.

[0092] In some embodiments, the mass-energy release simulation unit 20 may further include a steam exhaust pipeline 24 for exhausting the steam in the steam injection pipeline 22 to the outside atmosphere (outside the containment integrated experimental system 1). The steam exhaust pipeline 24 may be connected to the steam injection pipeline 22. It may also be electrically connected to the control unit to achieve steam exhaust under the control of the control unit.

[0093] It should be understood that for the accident conditions that may occur in the actual situation of the simulated prototype, there are more complex breach accidents. In the initial stage, saturated water will be sprayed into the main equipment at high energy and high pressure, and a gas-liquid two-phase mixture will be continuously injected into the main equipment in the middle and late stages. In the initial stage of high-energy spraying of saturated water, the spraying time is shorter than that in the middle and late stages. For example, for a certain complex breach accident of a simulated prototype, the high-energy spraying time is about tens of seconds.

[0094] If the complex accident condition is to be simulated, the control unit must be used to start the high-energy spraying pipeline 21 in the early stage to simulate the high-energy spraying of saturated water in the initial stage of the simulated prototype. In the middle and late stages, the control unit will close the high-energy spraying pipeline 21 and switch to the steam injection pipeline 22 and the water injection pipeline 23 to simulate the continuous injection of the gas-liquid two-phase mixture in the middle and late stages of the simulated prototype.

[0095] During the simulation experiment, it takes a certain amount of time for the transportation start of each pipeline to increase the flow rate to the level required by the simulation experiment. Therefore, if the steam injection pipeline 22 and the water injection pipeline 23 are started after the high-energy spraying pipeline 21 completes the simulation of the high-energy spraying of saturated water in the initial stage of the simulated prototype, it will cause them to fail to reach the level required by the simulation experiment in the early stage of startup. If they are to reach the level required by the simulation experiment in advance, it is necessary to start the steam injection pipeline 22 and the water injection pipeline 23 in advance. During this period of early startup, there is a problem that the steam and water output by the two pipelines have nowhere to be discharged.

[0096] The present application can discharge the steam output by the steam injection pipeline 22 to the outside of the containment comprehensive experimental system 1 by setting a steam discharge pipeline 24. In the process of simulating such breach accident conditions, the steam injection pipeline 22 can be started in advance while simulating the high-energy and high-pressure spraying of saturated water in the initial stage, so that it can reach the level required by the simulation experiment in advance. When it is necessary to simulate the stage in which a gas-liquid two-phase mixture is continuously injected into the main equipment in the middle and late stages, an instantaneous switch can be made through the control unit, and the flow conditions before and after the switch can be maintained at the level required by the simulation experiment. Such a setting can be more in line with the actual situation of the simulated prototype, further improve the integrity and accuracy of the simulation experiment, and avoid overpressure of the steam injection pipeline 22.

[0097] It should be understood that, for the early start of the water injection pipeline 23, it can also solve the problem of discharging the output water before the operation by setting a special water discharge pipeline. It is also possible to set a drainage pipeline and connect a water storage device such as a reservoir that delivers water to the water injection simulation body 231, so that the water discharged in the initial stage of the startup is input into the water storage device. It is also possible to set a water delivery pipeline 234 and communicate with the steam injection simulation body 221 to input the water discharged in the initial stage of the startup into the steam injection simulation body 221, and the steam raw material (water) of the steam injection simulation body 221 can also be injected while starting. It is not specifically limited here.

[0098] The steam exhaust pipeline 24 may include a steam exhaust pipe, both ends of which may be connected to the steam injection main pipeline 224 and the external environment of the containment integrated experimental system 1 respectively.

[0099] The connection position between the steam exhaust pipeline and the steam injection main pipeline 224 may be located downstream of the steam-water separator 225 .

[0100] In some other optional embodiments, one end of the steam exhaust pipe may also be connected to the steam injection simulation body 221 .

[0101] In some embodiments, the water injection pipeline 23 includes a water injection simulation body 231, a first water injection pipeline 232 and a second water injection pipeline 233. The two ends of the first water injection pipeline 232 are respectively connected to the water injection simulation body 231 and the containment simulation body 11. The two ends of the second water injection pipeline 233 are respectively connected to the water injection simulation body 231 and the main equipment cavity simulation body 12.

[0102] The first water injection pipeline 232 and the second water injection pipeline 233 may be directly connected to the water injection simulation body 231, or both may be connected to the water injection simulation body 231 through the same main pipeline, which is not specifically limited here.

[0103] It should be understood that the water injection simulation body 231 can be implemented by using existing saturated water generating equipment such as water tanks.

[0104] In some embodiments, the water injection pipeline 23 may further include a water delivery pipe 234. Both ends of the water delivery pipe 234 are respectively connected to the water injection simulation body 231 and the steam injection simulation body 221. The water in the water injection simulation body 231 is delivered to the steam injection simulation body 221 for heating to generate steam.

[0105] Such a setting can realize online water replenishment for the steam injection simulation body 221, and can meet the working condition simulation for a longer time range according to experimental requirements.

[0106] In some embodiments, the water injection pipeline 23 may also be provided with at least one water pump 90, which may be electrically connected to the control unit to achieve the delivery of saturated water at different powers through the control of the control unit.

[0107] The number of the water pumps 90 can be set to three, and one can be set on the first water injection pipeline 232, the second water injection pipeline 233 and the water delivery pipeline 234 respectively, so as to control the water injection operation of each pipeline respectively.

[0108] In some embodiments, the water injection pipeline 23 may further include a water injection main pipeline 235, through which the first water injection pipeline 232, the second water injection pipeline 233 and the water delivery pipeline 234 may be respectively connected to the water injection simulation body 231. In this embodiment, the number of the water pump 90 may be set to one, and it is set on the water injection main pipeline 235.

[0109] In some embodiments, a heater 80 may also be provided on the water injection simulation body 231 , and the heater 80 may be electrically connected to a control unit to control the temperature of the water source.

[0110] In some embodiments, each pipeline of the mass-energy release simulation unit 20 is provided with a regulating valve 50 and / or an isolation valve 60. The regulating valve 50 is used to adjust the opening of the pipeline, thereby controlling the resistance coefficient of the fluid in the pipeline, so as to control the output of a specific mass-energy release amount through the pipeline within a specific time. The isolation valve 60 is used to control the opening and closing of the pipeline.

[0111] Among them, at least one regulating valve 50 and / or isolation valve 60 can be set on the first high-energy spraying pipeline 212, the second high-energy spraying pipeline 213, the first steam injection pipeline 222, the second steam injection pipeline 223, the steam direct injection pipeline 226, the first water injection pipeline 232, the second water injection pipeline 233, the water delivery pipeline 234, the water injection main pipeline 235, the steam exhaust pipeline 24, the main pipe section 2241 of the steam injection main pipeline 224, and each parallel branch pipe section 2242. No specific limitation is made here.

[0112] It should be understood that the regulating valve 50 can flexibly select an electric regulating valve, a manual regulating valve, etc. according to the specific situation, and can also flexibly select a large flow regulating valve, a small flow regulating valve, etc. according to the needs of the pipeline, and no specific limitation is made here. The isolation valve 60 can also flexibly select an electric isolation valve, a manual isolation valve, a pneumatic isolation valve, etc. according to the specific situation, and can also flexibly select the specific parameters of the isolation valve according to the needs of the pipeline, and no specific limitation is made here. When the regulating valve 50 or the isolation valve 60 uses an electric valve, it can be electrically connected to the control unit to control the switch and opening of the valve through the control unit.

[0113] In some embodiments, the outlet openings of the high-energy spraying pipeline 21, the steam injection pipeline 22, and the water injection pipeline 23 are adjustable.

[0114] It should be understood that the reactor will produce accident conditions with different breach sizes, such as large breach accident conditions and small breach accident conditions. In the process of simulation experiments, in order to ensure the accuracy of the simulation, the size of the breach also needs to be precisely controlled. For example, if it is necessary to simulate the accident condition of the simulated prototype under a certain breach size to verify the passive heat removal and containment pressure suppression functions of the simulated prototype under the accident condition, the breach size on the main equipment simulation unit 10 needs to be reduced in the same proportion.

[0115] The present application sets the opening of the outlet end, and can adjust the breach size by adjusting the opening, so as to realize simulation experiments of accident conditions under different breach sizes through the containment comprehensive experimental system 1.

[0116] It should be understood that the outlet openings of the high-energy spraying pipeline 21, the steam injection pipeline 22, and the water injection pipeline 23 can be understood as the openings of the ends of the pipelines connected to the main equipment simulation unit 10. In this embodiment, it can be understood as the openings of the ports of the first high-energy spraying pipeline 212, the second high-energy spraying pipeline 213, the first steam injection pipeline 222, the second steam injection pipeline 223, the steam direct injection pipeline 226, the first water injection pipeline 232, and the second water injection pipeline 233 connected to the main equipment simulation unit 10, respectively.

[0117] It should be understood that the opening of the port connecting each pipeline to the main device simulation unit 10 can be achieved by providing a detachable pipeline port structure and replacing nozzles with different opening sizes for different simulation experiments. It can also be achieved by providing a nozzle with an adjustable opening size at the end. No specific limitation is made here.

[0118] It should be understood that in order to ensure the accuracy of parameters such as mass-energy release (also understood as energy, enthalpy value, etc.) and injection amount (also understood as mass, etc.) during the simulation experiment, the extended resistance of each pipeline in the mass-energy release simulation unit 20 needs to be controlled. In the process of adjusting the opening of the pipeline outlet, it is inevitable to affect the change of the resistance coefficient of the fluid in the pipeline. By setting valves such as regulating valves 50 on each pipeline, the resistance coefficient of the fluid in the pipeline can be controlled by regulating the valve opening. Each valve cooperates with the opening of the pipeline outlet to achieve the control of parameters such as mass-energy release (also understood as energy, enthalpy value, etc.) and injection amount (also understood as mass, etc.) during the simulation experiment, thereby improving the accuracy of the experiment.

[0119] The electrical connection between the aforementioned control unit and the high-energy blowdown pipeline 21, steam injection pipeline 22, water injection pipeline 23, steam exhaust pipeline 24, etc. can be understood as its electrical connection with the simulation body, valve, pump and other structures in each pipeline. The control of the pipeline is achieved by electrically connecting and controlling each structure.

[0120] In some embodiments, the outlet ends of the high-energy blowdown pipeline 21 , the steam injection pipeline 22 , and the water injection pipeline 23 are adjustably connected to the main equipment simulation unit 10 .

[0121] It should be understood that for various accident conditions of the reactor, the breach may occur at different positions of the containment or at different positions of other main equipment. The present application can simulate breach conditions at different positions by setting the outlet end of the pipeline to be adjustable on the main equipment simulation unit 10, thereby further improving the integrity and diversity of the simulation.

[0122] exist Figure 1 In the illustrated embodiment, the connection positions of the first high-energy blowdown pipe 212, the first steam injection pipe 222, the steam direct injection pipe 226, and the first water injection pipe 232 on the containment simulation body 11 are adjustable. The connection positions of the second high-energy blowdown pipe 213, the second steam injection pipe 223, and the second water injection pipe 233 on the main equipment cavity simulation body 12 are adjustable.

[0123] Such a setting, if combined with an adjustable outlet opening, can not only simulate the working conditions of breaches of different degrees at different locations of the containment, but also simulate the working conditions of breaches of different degrees at different locations of the main equipment cavity, which can further improve the integrity and diversity of the simulation experiment.

[0124] like Figure 1 As shown, in some embodiments, the containment integrated experimental system may further include a containment heat extraction simulation unit 30, which is communicated with the main equipment simulation unit 10 and is electrically connected to the control unit.

[0125] The containment heat extraction simulation unit 30 may include an ascending section pipeline 31, a descending section pipeline 32, a first heat exchanger 33 and a water tank 34. The two ends of the ascending section pipeline 31 are respectively connected to the first heat exchanger 33 and the water tank 34. The two ends of the descending section pipeline 32 are respectively connected to the first heat exchanger 33 and the water tank 34. The first heat exchanger 33 is disposed in the containment simulation body 11.

[0126] In some embodiments, the water tank 34 may be arranged at a position higher than the containment simulation body 11 in the gravity direction to simulate the passive heat removal module. Through the cooperation of the containment heat removal simulation unit 30, the containment comprehensive experimental system 1 can realize the performance experimental verification of safety functions such as post-accident containment heat removal and containment pressure suppression of a reactor with a passive heat removal function.

[0127] It should be understood that the size of the containment heat extraction simulation unit 30 can also be reduced year-on-year according to the reduction ratio of the main equipment simulation unit 10.

[0128] In some embodiments, the containment integrated experiment system 1 may further include an auxiliary circuit simulation unit 40, which is used to simulate various auxiliary circuits of the simulated prototype to serve other units or equipment according to the needs of the simulation experiment. The auxiliary circuit simulation unit 40 may include a compressed air injection pipeline 41 and a hydrogen injection pipeline 42. The compressed air injection pipeline 41 and the hydrogen injection pipeline 42 may be connected to the main equipment simulation unit 10, respectively. Both may be electrically connected to the control unit, respectively. The simulation operation may be achieved through the control of the control unit.

[0129] In the real situation of the simulated prototype, after an accident condition occurs, the simulated prototype will be filled with non-condensable gases such as hydrogen, which will affect the heat exchange performance. By setting up the hydrogen injection pipeline 42, the situation of non-condensable gas generated inside after the accident condition can be simulated. The compressed air injection pipeline 41 can control the pressure inside the main equipment simulation unit 10 by injecting compression control into the main equipment simulation unit 10, thereby simulating the internal pressure of the simulated prototype.

[0130] It should be understood that in order to ensure the safety performance of the simulation experiment, the present application can replace the gas source of hydrogen injection into pipeline 42 with helium, so as to achieve the release condition of light non-condensable gas after the simulation accident.

[0131] The compressed air injection pipeline 41 can be connected to the suppression pool gas space 132 of the containment simulation body 11 and the suppression pool simulation body 13, respectively. The hydrogen injection pipeline 42 can be connected to the containment simulation body 11 and the suppression pool gas space 132, respectively. In some embodiments, part of the pipeline can be shared between the compressed air injection pipeline 41 and the hydrogen injection pipeline 42. To reduce the number of pipeline settings. For example, the compressed air injection pipeline 41 may include a compressed air injection pipeline, and its two ends are respectively connected to the compressed air source equipment and the containment simulation body 11. The hydrogen injection pipeline 42 may include a hydrogen injection pipeline, and its two ends are respectively connected to the hydrogen source (helium source) equipment and the suppression pool gas space 132. A gas communication pipeline can also be provided between the compressed air injection pipeline 41 and the hydrogen injection pipeline 42, and its two ends are respectively connected to the compressed air injection pipeline and the hydrogen injection pipeline. Compressed air can be injected into the containment simulation body 11 through the compressed air injection pipeline, and can also be injected into the suppression pool gas space 132 through the compressed air injection pipeline, the gas communication pipeline and the hydrogen injection pipeline. The injection of hydrogen (helium) is similar and will not be described in detail here.

[0132] In some embodiments, the auxiliary loop simulation unit 40 may also include a temperature control pipeline 43, which may be disposed on the main equipment simulation unit 10 and / or the containment heat extraction simulation unit 30, and electrically connected to the control unit to achieve temperature control.

[0133] The number can be set to two, which are respectively arranged on the pressure suppression pool water space 131 of the main equipment simulation unit 10 and in the water tank 34 of the containment heat extraction simulation unit 30, so as to control the temperature of the water in the pressure suppression pool water space 131 and the water tank 34, thereby realizing the simulation of the temperature of the simulated prototype.

[0134] Taking the water tank 34 as an example, the second heat exchanger 431 of the temperature control pipeline 43 arranged on the water tank 34 can be arranged in the water tank 34, and both ends can extend to the outside of the main equipment simulation unit 10 respectively, and communicate with the cooling water source equipment, so as to achieve heat exchange with the water in the water tank 34 through the external cooling water. The heater 80 is used to heat the water in the water tank 34, and it can cooperate with the second heat exchanger 431 to achieve the control of the water temperature in the water tank 34. The temperature control pipeline 43 arranged in the pressure suppression pool water space 131 is the same, and it will not be repeated here.

[0135] In some embodiments, the auxiliary loop simulation unit 40 may further include at least one water circulation pipeline 44, which may be disposed on the main equipment simulation unit 10 and / or the containment heat extraction simulation unit 30 and electrically connected to the control unit to realize water circulation inside the unit and improve the consistency of water temperature. The water circulation pipeline 44 may include a water circulation pipe 441 and a water pump 90.

[0136] The number of them can be set to two, which are respectively arranged on the pressure suppression pool water space 131 of the main equipment simulation unit 10 and in the water tank 34 of the containment heat extraction simulation unit 30 to control the consistency of the water temperature in the pressure suppression pool water space 131 and the water tank 34.

[0137] Taking the water tank 34 as an example, the two ends of the water circulation pipe 441 can be respectively connected to different positions of the water tank 34. The water pump 90 is arranged on the water circulation pipe 441, and the temperature in the water space 131 of the suppression pool is uniformed by the pumping of the water pump 90. The water circulation pipeline 44 arranged in the water space 131 of the suppression pool is similar, and will not be described in detail here.

[0138] In some embodiments, an isolation valve 60 and / or a regulating valve 50 may also be provided on the water circulation pipeline 441 .

[0139] It should be understood that the auxiliary loop simulation unit 40, the containment heat extraction simulation unit 30 and the mass-energy release simulation unit 20 can act on the main equipment simulation unit 10 separately to perform a single performance simulation experiment. They can also work together to act on the main equipment simulation unit 10 to perform an overall performance simulation experiment.

[0140] It should be understood that the regulating valve 50 , the isolation valve 60 , the nozzle 70 , the heater 80 , the water pump 90 , etc. can all be implemented using existing technologies and are not specifically limited herein.

[0141] It should be understood that the main device simulation unit 10 may also be provided with various monitoring instruments, which may be electrically connected to the control unit to obtain and feedback various data during the simulation experiment, so as to facilitate the analysis of the simulation experiment. It may be implemented using existing equipment and is not specifically limited here.

[0142] The present application also constructs a comprehensive containment experiment method, which can utilize the comprehensive containment experiment system 1 constructed in any of the aforementioned embodiments to perform a simulation experiment on the comprehensive performance of the containment.

[0143] like Figure 4 As shown, the containment comprehensive experimental method includes the following steps:

[0144] S1. Determine the experimental working conditions to be simulated.

[0145] It should be understood that the operating conditions to be simulated can be roughly divided into several categories such as pressurizer rupture accident conditions and primary circuit small rupture accident conditions according to the specific operating conditions of the nuclear power plant.

[0146] S21. If the operating condition to be simulated is a pressurizer rupture accident condition, then within the first time period, the high-energy blowdown pipeline 21 is controlled to act on the main equipment simulation unit 10; and after the first time period, the high-energy blowdown pipeline 21 is controlled to be closed, and the steam injection pipeline 22 and the water injection pipeline 23 are controlled to act on the main equipment simulation unit 10.

[0147] S22 . If the working condition to be simulated is a small breach accident condition in a single circuit, the steam injection pipeline 22 and the water injection pipeline 23 are controlled to act on the main equipment simulation unit 10 .

[0148] It should be understood that, corresponding to the specific operating conditions of the nuclear power plant, the rupture size of the regulator rupture accident condition is different from that of the primary circuit small rupture accident condition, and the spraying process under the accident condition is also different.

[0149] By controlling the high-energy blowing pipeline 21 in the first time period, the rapid blowing process at the initial stage of a pressurizer rupture accident can be effectively simulated, so that the simulation experiment can be closer to the actual situation.

[0150] By simultaneously controlling the steam injection pipeline 22 and the water injection pipeline 23 to act on the main equipment simulation unit 10, the injection of the gas-liquid two-phase mixture under the actual working conditions can be more accurately simulated, further improving the accuracy of the simulation experiment.

[0151] S3. Obtain experimental data.

[0152] It should be understood that the experimental data can be obtained through various monitoring instruments provided in the main device simulation unit 10. The monitoring instruments are electrically connected to the control unit, thereby realizing data acquisition.

[0153] The experimental data can be integrated to obtain data that can be compared. Furthermore, it can be compared with the modeling data obtained by previous calculations to determine the accuracy of the simulation experiment.

[0154] By accurately conducting simulation experiments, the comprehensive performance of the containment can be analyzed and verified through the feedback of the main equipment simulation unit 10 during the experiment (for example, the temperature distribution in the containment, the system temperature response characteristics, the system pressure response characteristics, etc.).

[0155] In some embodiments, step S21 may include:

[0156] If the working condition to be simulated is a pressurizer breach accident condition, then within the first time period, the high energy blowdown pipeline 21 is controlled to inject g of saturated water into the main equipment simulation unit 10. After the first time period, the high energy blowdown pipeline 21 is controlled to be closed.

[0157] The mass-energy release process after the first time period is divided into at least three time periods. In different time periods, the steam injection pipeline 22 and the water injection pipeline 23 are respectively controlled to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit 10 .

[0158] In some embodiments, step S22 includes: if the operating condition to be simulated is a small breach accident condition in a single circuit, the potential energy release process is divided into at least three time periods, and in different time periods, the steam injection pipeline 22 and the water injection pipeline 23 are controlled to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit 10.

[0159] It should be understood that the mass-energy release process is different for different types of breach accident conditions, and for different specific breach locations or different specific breach sizes of the same type of breach accident conditions. Therefore, in the simulation process, the division of time periods in the mass-energy release process, as well as the injection amount of saturated water and saturated steam in each time period, are also different.

[0160] The pressurizer rupture accident condition can be further divided into a pressurizer spray pipe rupture accident condition caused by the pressurizer spray pipe rupture, and a pressurizer surge pipe rupture accident condition caused by the pressurizer surge pipe rupture. If the rupture position of the accident condition corresponds to the main equipment simulation unit 10, the pressurizer spray pipe rupture accident condition may be set on the containment simulation body 11, the pressurizer surge pipe rupture accident condition may be set on the main equipment cavity simulation body 12, and the primary circuit small rupture accident condition may be set on the containment simulation body 11 or on the main equipment cavity simulation body 12. No specific limitation is made here.

[0161] Therefore, in some embodiments, the number of time periods for the pressurizer spray pipe rupture accident condition, the pressurizer surge pipe rupture accident condition, and the primary circuit small rupture accident condition, the length of each time period, the saturated water injection mass in different time periods, and the saturated steam injection mass in different time periods all need to be flexibly determined based on the actual conditions being simulated. The values ​​may be the same or completely different, and are not specifically limited here.

[0162] For example, if the accident condition of a stabilizer spray pipe rupture is simulated, the duration of the first time period can be set to t1 based on the calculation data obtained in the previous calculation, and the mass-energy release process after the first time period can be divided into four (or five, six, or other majority) time periods, and the duration of each time period is determined separately (for example, the durations of the four time periods are t2, t3, t4, t5, etc., respectively).

[0163] Furthermore, the mass of saturated water and saturated steam to be injected in each time period can be determined based on the previous calculation results. For example, saturated water of mass g1 is injected in the first time period. Saturated water of mass g21 and saturated steam of mass g22 are injected in the second time period. Saturated water of mass g31 and saturated steam of mass g32 are injected in the third time period. Saturated water of mass g41 and saturated steam of mass g42 are injected in the fourth time period. Saturated water of mass g51 and saturated steam of mass g52 are injected in the fifth time period, etc.

[0164] The same is true for other working conditions, which will not be elaborated here.

[0165] It should be understood that the injection amount in different time periods can be controlled by controlling the valve opening of the corresponding pipeline to control the flow rate of the fluid in the pipeline. By dividing the entire mass-energy release process into multiple time periods, the release process in a real breach accident condition can be simulated more accurately.

[0166] The present application will be further described below through a specific experimental simulation process:

[0167] Table 1

[0168]

[0169] The experiment simulated three breach accident conditions. As shown in Table 1, the simulation of the pressurizer spray pipe breach accident condition and the pressurizer surge pipe breach accident condition both set four time periods. Among them, the spraying volume of each pipeline in the time period of the two pressurizer breach accident conditions is different. The small breach accident condition of the first circuit is set with three time periods, and the spraying volume of each pipeline in each time period is also different from the two pressurizer breach accident conditions.

[0170] Figure 5 and Figure 6 The injection quality and injection energy at each stage of the simulation experiment under the accident condition of the stabilizer spray pipe rupture are shown respectively. Figure 7 and Figure 8 The injection quality and injection energy at each stage of the simulation experiment under the condition of the surge tube rupture accident of the stabilizer are shown respectively. Fig. 9 and Fig.10 The injection quality and injection energy at each stage of the simulation experiment under the condition of a small breach accident in the primary circuit are shown respectively.

[0171] according to Figures 5 to 10 It can be seen that by using the comprehensive containment experiment system 1 constructed in the present application and applying the comprehensive containment experiment method constructed in the present application to conduct simulation experiments, it is possible to make the injected energy value as close to the modeled value as possible during the mass-energy release process, and to make the injected mass as close to the modeled value as possible, thereby improving the accuracy of the simulation experiment.

[0172] It should be understood that the "modulated value" is the modulated data obtained by the previous calculation.

[0173] In some embodiments, between step S1 and step S2 (step S21 and step S22), the containment comprehensive test method may further include:

[0174] Step S0, adjusting the initial water temperature in the main equipment simulation unit 10 according to the working condition to be simulated; and / or adjusting the initial liquid level value in the main equipment simulation unit 10 according to the working condition to be simulated.

[0175] In some embodiments, for the main equipment simulation unit 10 provided with a pressure suppression pool simulation body 13, a pressure release valve can also be provided between the chamber of the containment simulation body 11 and the pressure suppression pool gas space 132 of the pressure suppression pool simulation body 13 to control the pressure difference between the containment simulation body 11 and the pressure suppression pool gas space 132.

[0176] The step S0 may further include: setting a target value for fully opening the pressure relief valve according to the working condition to be simulated.

[0177] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0178] The above embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present application, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application. Therefore, all equivalent changes and modifications made to the scope of the claims of the present application should belong to the scope covered by the claims of the present application.

Claims

1. A containment comprehensive experiment system, characterized in that: include: A master device simulation unit (10); A mass-energy release simulation unit (20), the mass-energy release simulation unit (20) comprising a high-energy spraying pipeline (21), a steam injection pipeline (22) and a water injection pipeline (23); the high-energy spraying pipeline (21), the steam injection pipeline (22) and the water injection pipeline (23) are respectively connected to the main equipment simulation unit (10); and a control unit, which controls the switch and flow of the high-energy spraying pipeline (21), the steam injection pipeline (22) and the water injection pipeline (23) respectively.

2. The containment comprehensive experiment system according to claim 1, characterized in that: The main equipment simulation unit (10) comprises a containment simulation body (11), a main equipment cavity simulation body (12), a suppression water pool simulation body (13) and a suppression pipe simulation body (14); the containment simulation body (11) is connected to the main equipment cavity simulation body (12); the main equipment cavity simulation body (12) is connected to the suppression water pool simulation body (13) via the suppression pipe simulation body (14).

3. The containment comprehensive experiment system according to claim 2 is characterized in that: The high-energy blowdown pipeline (21) is respectively connected to the containment simulation body (11) and the main equipment cavity simulation body (12), and / or the steam injection pipeline (22) is respectively connected to the containment simulation body (11) and the main equipment cavity simulation body (12), and / or the water injection pipeline (23) is respectively connected to the containment simulation body (11) and the main equipment cavity simulation body (12).

4. The containment comprehensive experiment system according to claim 2, characterized in that: The high-energy blowing pipeline (21) comprises a high-energy blowing simulation body (211), a first high-energy blowing pipeline (212) and a second high-energy blowing pipeline (213); two ends of the first high-energy blowing pipeline (212) are respectively connected to the high-energy blowing simulation body (211) and the containment simulation body (11); and two ends of the second high-energy blowing pipeline (213) are respectively connected to the high-energy blowing simulation body (211) and the main equipment cavity simulation body (12).

5. The containment comprehensive experiment system according to claim 2, characterized in that: The steam injection pipeline (22) comprises a steam injection simulation body (221), a first steam injection pipeline (222) and a second steam injection pipeline (223); two ends of the first steam injection pipeline (222) are respectively connected to the steam injection simulation body (221) and the containment simulation body (11); two ends of the second steam injection pipeline (223) are respectively connected to the steam injection simulation body (221) and the main equipment chamber simulation body (12).

6. The containment comprehensive experiment system according to claim 2, characterized in that: The water injection pipeline (23) comprises a water injection simulation body (231), a first water injection pipeline (232) and a second water injection pipeline (233); two ends of the first water injection pipeline (232) are respectively connected to the water injection simulation body (231) and the containment simulation body (11); and two ends of the second water injection pipeline (233) are respectively connected to the water injection simulation body (231) and the main equipment chamber simulation body (12).

7. The containment comprehensive experiment system according to claim 1, characterized in that: The openings and / or positions of the outlet ends of the high-energy blowing pipeline (21), the steam injection pipeline (22) and the water injection pipeline (23) are adjustable.

8. The containment comprehensive experiment system according to claim 1, characterized in that: The outlet ends of the high-energy blowing pipeline (21), the steam injection pipeline (22) and the water injection pipeline (23) are adjustably connected to the main equipment simulation unit (10).

9. The containment comprehensive experiment system according to claim 1, characterized in that: Each pipeline of the mass-energy release simulation unit (20) is respectively provided with an isolation valve (60) and / or a regulating valve (50) for controlling the resistance coefficient of the fluid in the pipeline.

10. The containment comprehensive experiment system according to any one of claims 1 to 9, characterized in that: The mass-energy release simulation unit (20) further comprises a steam exhaust pipeline (24); the steam exhaust pipeline (24) is electrically connected to the control unit, and the steam injection pipeline (22) discharges steam out of the system through the steam exhaust pipeline (24).

11. The containment comprehensive experiment system according to any one of claims 1 to 9, characterized in that: The containment shell comprehensive experimental system further comprises a containment shell heat extraction simulation unit (30); the containment shell heat extraction simulation unit (30) is communicated with the main equipment simulation unit (10) and is electrically connected to the control unit; And / or, the containment integrated experimental system further comprises an auxiliary loop simulation unit (40); the auxiliary loop simulation unit (40) comprises a compressed air injection pipeline (41) and a hydrogen injection pipeline (42) respectively connected to the main equipment simulation unit (10).

12. The containment comprehensive experiment system according to claim 11, characterized in that: The main equipment simulation unit (10) comprises a containment simulation body (11), a main equipment cavity simulation body (12) and a suppression pool simulation body (13) which are interconnected; the main equipment cavity simulation body (12) is connected between the containment simulation body (11) and the suppression pool simulation body (13).

13. A comprehensive containment test method, characterized in that: The containment comprehensive experiment system (1) applied to any one of claims 1 to 12, wherein the containment comprehensive experiment method comprises the following steps: S1. Determine the working conditions to be simulated in the experiment; S21. If the working condition to be simulated is a pressurizer breach accident working condition, then within a first time period, the high energy blowdown pipeline (21) is controlled to act on the main equipment simulation unit (10); and after the first time period, the high energy blowdown pipeline (21) is controlled to be closed, and the steam injection pipeline (22) and the water injection pipeline (23) are controlled to act on the main equipment simulation unit (10); S22, if the working condition to be simulated is a small breach accident condition of a primary circuit, controlling the steam injection pipeline (22) and the water injection pipeline (23) to act on the main equipment simulation unit (10); S3. Obtain experimental data.

14. The containment comprehensive test method according to claim 13, characterized in that: The step S21 comprises: If the working condition to be simulated is a pressurizer breach accident condition, then within a first time period, the high-energy blowdown pipeline (21) is controlled to inject g of saturated water into the main equipment simulation unit (10); and after the first time period, the high-energy blowdown pipeline (21) is controlled to be closed; The potential energy release process after the first time period is divided into at least three time periods. In different time periods, the steam injection pipeline (22) and the water injection pipeline (23) are respectively controlled to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit (10).

15. The containment comprehensive test method according to claim 13, characterized in that: The step S22 comprises: If the operating condition to be simulated is a small breach accident condition in a single circuit, the potential energy release process is divided into at least three time periods, and in different time periods, the steam injection pipeline (22) and the water injection pipeline (23) are respectively controlled to inject different masses of saturated water and different masses of saturated steam into the main equipment simulation unit (10).

16. The containment comprehensive test method according to claim 13, characterized in that: Between step S1, step S21 and step S22, step S0 is also included: According to the working condition to be simulated, adjusting the initial water temperature in the main equipment simulation unit (10); And / or, according to the working condition to be simulated, adjusting the initial liquid level value in the main equipment simulation unit (10).

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