An experimental apparatus and method for testing the fouling behavior of corrosion products in light water reactors.

Abstract

This invention discloses an experimental apparatus for studying the fouling behavior of corrosion products from light water reactors. The apparatus includes an aqueous chemical preparation mechanism, a source solution tank, an experimental mechanism, and a heating mechanism. The aqueous chemical preparation mechanism supplies the experimental aqueous solution. The inlet of the source solution tank is connected to the outlet of the aqueous chemical preparation mechanism. The inlet of the experimental mechanism is connected to the outlet of the source solution tank via a high-pressure pump. The experimental mechanism includes multiple experimental containers arranged in parallel, allowing the experimental aqueous solution to deposit on the surface of samples within the experimental containers. The heating mechanism indirectly heats the samples within the experimental containers. This apparatus can be used to study the deposition behavior of corrosion products from light water reactors on heat exchange surfaces, addressing the problems of long experimental cycles, low efficiency, and biased results. The experimental method for studying the fouling behavior of corrosion products from light water reactors can also be used to study the deposition behavior of corrosion products from light water reactors on heat exchange surfaces, addressing the problems of long experimental cycles, low efficiency, and biased results.

Description

Technical Field

[0001] This invention relates to the field of light water reactor technology, specifically to a test apparatus and test method for the fouling behavior of corrosion products in light water reactors. Background Technology

[0002] Currently operational commercial light water reactors include boiling water reactors (BWRs) and pressurized water reactors (PWRs). Both types of reactors have large heat transfer surfaces, such as the fuel cladding in the cores of BWRs and PWRs, and the steam generators in PWRs. These heat transfer surfaces exhibit significant temperature and acidity gradients, and localized nucleation boiling may occur. These temperature variations, pH changes, and coolant phase transition behavior all affect the fouling behavior of corrosion products in the coolant on the heat transfer surfaces. Fouling not only severely degrades heat transfer on these surfaces but may also accelerate corrosion. Especially for the fuel cladding, the deposition of corrosion products causes uneven distribution of solid boron on the cladding surface, inevitably leading to a shift in axial power distribution towards the lower half of the core, thus affecting the safe and stable operation of the reactor.

[0003] Due to the cost, safety, and radioactivity requirements of nuclear reactors, reactor-based experimental research is impractical. Establishing an off-reactor simulation research system is currently a feasible and effective method.

[0004] However, the existing simulation research systems generally have long experimental cycles and low efficiency. Furthermore, as time goes by during the experiment, various parameters and reaction conditions inevitably change. When comparative experiments are needed to verify the conclusions, it is difficult to reproduce all the conditions of the previous experiment, leading to biased comparisons and affecting the accuracy of the conclusions. Summary of the Invention

[0005] The primary objective of this invention is to provide an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. This apparatus can be used to investigate the deposition behavior of corrosion products on heat exchange surfaces in light water reactors, thereby addressing the problems of long experimental cycles, low efficiency, and biased results.

[0006] The second objective of this invention is to provide a test method for the fouling behavior of corrosion products in light water reactors, which can solve the problems of long experimental cycles and numerous research factors.

[0007] This invention is achieved through the following technical solution:

[0008] A test apparatus for assessing the fouling behavior of corrosion products in light water reactors includes: an aqueous chemical preparation mechanism for supplying a test aqueous solution; a source liquid tank, the inlet of which is connected to the outlet of the aqueous chemical preparation mechanism; a test mechanism, the inlet of which is connected to the outlet of the source liquid tank via a high-pressure pump, the test mechanism comprising multiple test containers arranged in parallel, wherein the test aqueous solution can deposit on the surface of a sample within the test containers; and a heating mechanism for indirectly heating the sample within the test containers.

[0009] Optionally, it also includes a heat exchanger, which is provided with a low-temperature flow channel and a high-temperature flow channel capable of heat exchange; the outlet of the test mechanism is connected to the inlet of the high-temperature flow channel; the outlet of the source liquid tank is connected to the inlet of the low-temperature flow channel, and the outlet of the low-temperature flow channel is connected to the inlet of the test mechanism.

[0010] Optionally, the outlet of the low-temperature flow channel is connected to the inlet of the test mechanism via a preheater.

[0011] Optionally, the outlets of all the test containers are connected to a mixer, and the outlet of the mixer is connected to the inlet of the high-temperature flow channel; the outlet of the source liquid tank is connected to the mixer through a separator pipe.

[0012] Optionally, the inlet of the liquid separator is located on the inlet side of the heat exchanger.

[0013] Optionally, the outlet of the test mechanism is connected to a final liquid tank via a condenser, a pressure reducing valve, and a first measuring module; the final liquid tank is connected to the outlet of the water chemical preparation mechanism; and the final liquid tank is connected to the source liquid tank.

[0014] Optionally, the outlet of the source liquid tank is returned through a return pipe, which is equipped with a check valve, a filter, and a second measuring module.

[0015] Optionally, the test container is provided with a test flow channel and a rapid cooling flow channel, the middle of which is connected to the inner cavity of the test container; the inlet and outlet of the test flow channel and the rapid cooling flow channel are provided with shut-off valves; the inlet of the test flow channel is connected to the source liquid tank; the inlet of the rapid cooling flow channel is connected to an inert gas cooling tank, and the outlet of the rapid cooling flow channel is connected to a waste liquid tank.

[0016] Optionally, the water chemistry preparation mechanism includes: multiple parallel corrosion simulation units, each corrosion simulation unit including multiple parallel culture tanks; an inert gas tank and an oxygen tank, the gas supply ports of the inert gas tank and the oxygen tank being connected to all the culture tanks respectively; multiple metering pumps, each metering pump corresponding to one of the corrosion simulation units and respectively located at the outlet of the corresponding corrosion simulation unit; the outlets of all the corrosion simulation units are connected in parallel to form the outlet of the water chemistry preparation mechanism.

[0017] A test method for the fouling behavior of corrosion products in light water reactors, using the aforementioned test apparatus for the fouling behavior of corrosion products in light water reactors, includes the following steps:

[0018] Corrosion products are cultured in each of the culture tanks according to experimental requirements, and the metering pumps are adjusted to obtain the test aqueous solution from the source liquid tank.

[0019] The test aqueous solution is introduced into the test mechanism and distributed to each of the test containers. The sample in the test container is indirectly heated by the heating mechanism. The flow rate of each test container is adjusted and the heating conditions of the sample in each test container are set.

[0020] Periodically and quantitatively obtain the source liquid tank, the final liquid tank, and the solution from the test container at the sampling port to obtain the concentration of soluble and insoluble corrosion product particles;

[0021] When the test of any of the test containers reaches the predetermined time, the solution in the test container is quickly drained through the rapid cooling channel, and the sample is rapidly cooled; after it is cooled to room temperature, the sample is removed, and the deposition of corrosion products on the sample surface is analyzed; a new sample is then placed, and the test container is restarted; the remaining test containers are started or stopped individually or simultaneously in a similar manner.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] This invention provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It includes a water chemistry preparation mechanism to prepare and supply aqueous solutions of specific components and concentrations to be studied. A source liquid tank stores the aqueous solution prepared by the water chemistry preparation mechanism, and the high-pressure pump raises the flow rate of the aqueous solution to a high level. Furthermore, an experimental mechanism and a heating mechanism are included. The experimental mechanism comprises multiple parallel experimental containers, which are used to divert the high-flow-rate aqueous solution. The same aqueous solution is used to conduct independent tests under different conditions in each experimental container, forming a high-quality comparative experiment. The heating mechanism can... Indirect heating of the sample in the test container can induce various boiling states, such as supercooled boiling and saturated boiling. Corrosion products in the aqueous solution can then accumulate on the sample surface. After the test cycle, rapid drainage and inert gas cooling preserve the true form of the scale. By observing and analyzing the scale accumulation on the sample surface inside the test container, the scaling behavior of light water reactor corrosion products can be accurately studied. Furthermore, using multiple test containers in parallel allows for simultaneous and independent comparative experiments with different parameters. This improves experimental efficiency and avoids the problem of inaccurate reproduction of conditions such as aqueous source or reaction parameters, thus effectively enhancing the convenience and accuracy of the experiment. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 A schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water piles provided in Embodiment 1 of the present invention;

[0026] Figure 2 A schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water piles provided in Embodiment 2 of the present invention;

[0027] Figure 3 A schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water piles provided in Embodiment 3 of the present invention;

[0028] Figure 4 A schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water piles provided in Embodiment 4 of the present invention;

[0029] Figure 5 A schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water piles provided in Embodiment 5 of the present invention;

[0030] Figure 6 This is a schematic diagram of the test apparatus for the fouling behavior of corrosion products in light water reactors provided in Embodiment 6 of the present invention.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] 1-Water chemical preparation mechanism; 10-Source liquid tank; 11-High pressure pump; 12-Distribution pipe; 13-Return pipe; 20-Test container; 30-Condenser; 31-Pressure reducing valve; 32-First measurement module; 33-Final liquid tank; 34-Check valve; 35-Filter; 36-Second measurement module; 40-Heat exchanger; 41-Preheater; 50-Mixer; 60-Stop valve; 61-Inert gas cooling tank; 62-Waste liquid tank; 70-Incubation tank; 71-Inert gas tank; 72-Oxygen tank; 73-Metering pump. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] Please refer to Figure 1 This embodiment provides a test apparatus for the fouling behavior of corrosion products in light water reactors, including an aqueous chemical preparation mechanism 1 for supplying a test aqueous solution; a second part includes a source liquid tank 10, the inlet of which is connected to the outlet of the aqueous chemical preparation mechanism 1; a third part includes a test mechanism, the inlet of which is connected to the outlet of the source liquid tank 10 via a high-pressure pump 11, the test mechanism including multiple test containers 20 arranged in parallel, the test aqueous solution being able to deposit on the surface of the sample in the test container 20; and a fourth part includes a heating mechanism (not shown), the heating mechanism being able to indirectly heat the sample in the test container 20.

[0036] The experimental apparatus for studying the fouling behavior of corrosion products in light water reactors provided in this embodiment includes an aqueous chemical preparation mechanism 1, which prepares and supplies aqueous solutions of specific components and concentrations to be studied. A source liquid tank 10 and a high-pressure pump 11 are also included. The source liquid tank 10 stores the aqueous solution prepared by the aqueous chemical preparation mechanism 1, and the high-pressure pump 11 raises the aqueous solution to a high flow rate. Furthermore, an experimental mechanism and a heating mechanism (not shown) are included. The experimental mechanism comprises multiple parallel experimental containers 20, which are used to divert the high-flow-rate aqueous solution. The same aqueous solution is used to conduct independent experiments under different conditions in each experimental container 20, thus forming a... This method enables high-quality comparative experiments. The heating mechanism indirectly heats the sample inside the test container 20, causing supercooled boiling or saturated boiling on its surface. The aqueous solution forms scale on the sample surface. After the test cycle, rapid drainage and inert gas cooling are used to preserve the true morphology of the scale. By observing and analyzing the scale formation on the sample surface inside the test container 20, the scaling behavior of light water reactor corrosion products can be accurately studied. Furthermore, by using multiple test containers 20 in parallel, multiple comparative experiments with different parameters can be conducted independently and simultaneously. This improves experimental efficiency and avoids the problem of inaccurate reproduction of conditions such as aqueous solution sources or reaction parameters, thereby effectively improving the convenience and accuracy of the experiment.

[0037] It should be noted that the above-mentioned test container 20 has an inner cavity, which allows the aqueous solution to enter the inner cavity, and at least one sample can be placed in the axial direction of the inner cavity. After the sample is heated inside, scale is generated on its outer surface. Preferably, the inner cavity of each test container 20 can be closed or opened so that any one of the test containers 20 can be opened independently.

[0038] It should be noted that the heating mechanism mentioned above can be any controllable heating mechanism in the prior art, such as electric heating wire, electric heating tube and chemical heating mechanism. Electric heating mechanism is preferred. It only needs to be able to indirectly heat the sample in the test container 20 by heat exchange, and it needs to have a control system that can accurately control its heating temperature so as to adjust the working conditions and experimental conditions of each test container 20 for subsequent comparison.

[0039] Example 2

[0040] Please Figure 1 Further reference Figure 2 This embodiment provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It is a further improvement on Embodiment 1, and the improvement is as follows:

[0041] In order to preheat the aqueous solution to reach the preset initial temperature for entering the test container 20 and to make full use of the residual heat after the experiment, the test device also includes a heat exchanger 40, which is provided with a low-temperature flow channel and a high-temperature flow channel capable of heat exchange; the outlet of the test mechanism is connected to the inlet of the high-temperature flow channel; the outlet of the source liquid tank 10 is connected to the inlet of the low-temperature flow channel, and the outlet of the low-temperature flow channel is connected to the inlet of the test mechanism.

[0042] By setting up a heat exchanger 40 with low-temperature and high-temperature flow channels for heat exchange, the heat from the high-temperature aqueous solution discharged from the test facility is recycled and transferred to the high-flow-rate aqueous solution that has not entered the test facility for preheating, so that its temperature is close to the preset initial temperature of the test container 20. On the one hand, heat is recycled to improve energy utilization, and on the other hand, the temperature of the aqueous solution discharged from the test facility is reduced to prevent the formation of a gas phase and high temperature injury.

[0043] Preferably, to further adjust the temperature of the high-flow-rate aqueous solution, the outlet of the low-temperature channel is connected to the inlet of the test mechanism via a preheater 41. Through this connection, the aqueous solution, after initial preheating by the heat exchanger 40, is further preheated by the preheater 41 to reach the preset initial temperature of the test container 20. This addresses the problem that the temperature of the high-temperature aqueous solution discharged from the test mechanism is uncertain and may not be able to effectively preheat the high-flow-rate aqueous solution.

[0044] Example 3

[0045] Please Figure 2 Further reference Figure 3 This embodiment provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It is a further improvement on Embodiment 2, and the improvement is as follows:

[0046] To further prevent injury from the gas phase of the high-temperature aqueous solution discharged from the test facility, all the outlets of the test containers 20 are connected to a mixer 50, and the outlet of the mixer 50 is connected to the inlet of the high-temperature flow channel; the outlet of the source liquid tank 10 is connected to the mixer 50 through a separator pipe 12.

[0047] With the above setup, the mixer 50 collects all the high-temperature aqueous solution discharged from the test container 20, and at the same time, the separator 12 diverts a portion of the unheated high-flow-rate aqueous solution that has not yet entered the test mechanism to mix with the collected high-temperature aqueous solution, thereby effectively reducing the temperature of the high-temperature aqueous solution and preventing the formation of a gas phase.

[0048] Preferably, the inlet of the liquid separator 12 is located on the inlet side of the heat exchanger 40.

[0049] With the above settings, the high-velocity aqueous solution obtained by the diversion pipe 12 is not heated by the heat exchanger 40 or the preheater 41, so that it maintains its original temperature and improves the cooling effect after mixing.

[0050] Example 4

[0051] Please Figure 3 Further reference Figure 4 This embodiment provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It is a further improvement on Embodiment 3, and the improvement is as follows:

[0052] In order to reuse the aqueous solution discharged from the test facility and improve the utilization rate of the aqueous solution, the outlet of the test facility is connected to a final liquid tank 33 through a condenser 30, a pressure reducing valve 31 and a first measuring module 32; the final liquid tank 33 is connected to the outlet of the water chemical preparation mechanism 1; the final liquid tank 33 is connected to the source liquid tank 10.

[0053] With the above setup, the high-temperature aqueous solution passing through the heat exchanger 40 is cooled by the condenser 30, and then its pressure and speed are reduced by the pressure reducing valve 31 before being introduced into the final liquid tank 33. The first measurement module 32 detects and controls its various parameters. Then, the parameters can be adaptively adjusted in the final liquid tank 33, and the adjusted aqueous solution can be mixed into the source liquid tank 10 for reuse, thereby forming an effective reuse of the aqueous solution.

[0054] In order to control and correct the situation of the aqueous solution discharged from the source liquid tank 10, the outlet of the source liquid tank 10 is returned through the return pipe 13, which is equipped with a check valve 34, a filter 35 and a second measurement module 36.

[0055] With the above settings, the parameters of the aqueous solution discharged from the source liquid tank 10 are detected by the second measurement module 36. When the parameters are found to be substandard, the aqueous solution discharged is returned to the source liquid tank 10 by the water chemical adjustment mechanism 1 for adjustment. After the adjustment is appropriate, it is discharged again. The filter 35 can filter particulate impurities in the aqueous solution discharged from the source liquid tank 10 to prevent them from affecting the accuracy of subsequent test results.

[0056] Example 5

[0057] Please Figure 4 Further reference Figure 5 This embodiment provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It is a further improvement on Embodiment 4, and the improvement is as follows:

[0058] In order to independently analyze the fouling situation inside each test container 20 and preserve the characteristic properties of the fouling to the greatest extent possible without affecting the smooth conduct of tests on other test containers 20, the test container 20 is provided with a test flow channel and a rapid cooling flow channel. The middle part of the test flow channel and the rapid cooling flow channel are connected to the inner cavity of the test container 20. The inlet and outlet of the test flow channel and the rapid cooling flow channel are both provided with shut-off valves 60. The inlet of the test flow channel is connected to the source liquid tank 10. The inlet of the rapid cooling flow channel is connected to an inert gas cooling tank 61, and the outlet of the rapid cooling flow channel is connected to a waste liquid tank 62.

[0059] With the above setup, when the test of a certain test container 20 is completed, the regulating valves and shut-off valves 60 at both ends of its test flow channel are closed, and then the shut-off valves 60 at both ends of the rapid cooling flow channel are opened. The aqueous solution in the test container 20 is discharged into the waste liquid tank 62. At the same time, the inert gas in the inert gas cooling tank 61 is introduced into the test container 20 through the cooling flow channel to rapidly cool the sample. After it has cooled to room temperature, the sample can be removed to observe and analyze the scale buildup on the outer surface of the sample. This process does not affect the reaction in the other test containers 20 at all, so that the scale buildup in each test container 20 can be analyzed independently. Furthermore, the use of rapid inert gas cooling can fully preserve the characteristic properties of the scale, further improving the accuracy of the analysis results.

[0060] It should be noted that the flow rate of each test container 20 can be individually controlled by the regulating valve at the inlet of the test flow channel. When the test of a test container 20 is completed, it can be stopped independently, and a new sample can be installed to continue the test.

[0061] Example 6

[0062] Please refer to Figure 5 and Figure 6 This embodiment provides an experimental apparatus for studying the fouling behavior of corrosion products in light water reactors. It is a further improvement on Embodiment 5, and the improvement is as follows:

[0063] To fully address different experimental needs and prepare aqueous solutions that meet those needs, the water chemistry preparation mechanism 1 includes: multiple parallel corrosion simulation units, each of which includes multiple parallel culture tanks 70; secondly, it includes an inert gas tank 71 and an oxygen tank 72, the gas supply ports of which are respectively connected to all of the culture tanks 70; thirdly, it includes multiple metering pumps 73, each corresponding to one of the corrosion simulation units and respectively located at the outlet of the corresponding corrosion simulation unit; the outlets of all the corrosion simulation units are connected in parallel to form the outlet of the water chemistry preparation mechanism 1.

[0064] With the above setup, each culture tank 70 independently cultivates specific corrosion products. Based on this, the output supply ratio between each culture tank 70 of each corrosion simulation unit is adjusted as needed to obtain a mixed corrosion product that meets the requirements. Based on this, the pumping parameters of each metering pump 73 are further adjusted as needed to adjust the supply ratio of the mixed corrosion product between all corrosion simulation units, thereby obtaining an aqueous solution that meets the experimental requirements.

[0065] It should be noted that the outlet of the culture tank 70 is equipped with an adjustment valve to adjust the supply ratio of each culture tank 70 in each corrosion simulation unit.

[0066] Preferably, the outlet of each culture tank 70 is equipped with a filter for filtering solid impurities.

[0067] Preferably, a pressure regulator is provided on the outlet side of the high-pressure pump 11 to buffer the pulse fluctuations of the aqueous solution and maintain the pressure stability at the high pressure point of the aqueous solution.

[0068] Preferably, the components requiring sampling and monitoring, such as the source liquid tank 10 and the final liquid tank 33, are equipped with sampling ports. Periodic sampling is used to determine the condition of the aqueous solution inside, so as to ensure the smooth progress of the entire experiment.

[0069] It should be noted that the experimental setup is also equipped with multiple monitoring instruments, such as pressure gauges, flow meters, and thermometers. In particular, the experimental mechanism is equipped with multiple of these instruments to monitor the parameters during the experiment.

[0070] Example 7

[0071] This embodiment also provides a test method for the fouling behavior of corrosion products in light water piles, which is conducted using the test apparatus for the fouling behavior of corrosion products in light water piles described in Example 6, and includes the following steps:

[0072] S1. According to the experimental requirements, the corrosion products are cultured in each of the culture tanks 70, and the metering pump 73 is adjusted to obtain the test aqueous solution in the source liquid tank.

[0073] S2. The test aqueous solution is introduced into the test mechanism and distributed to each of the test containers 20. The sample in the test container 20 is indirectly heated by the heating mechanism, and the heating conditions of the sample in each of the test containers 20 are set respectively.

[0074] S3. Periodically and quantitatively obtain the source liquid tank 10, the final liquid tank 33, and the solution from the test container 20 at the sampling port to obtain the concentration of soluble and insoluble corrosion product particles.

[0075] S4. When the test of any one of the test containers 20 reaches the predetermined time, the solution in the test container 20 is quickly drained through the rapid cooling channel, and the sample is rapidly cooled; after it is cooled to room temperature, the sample is removed, and the deposition of corrosion products on the sample surface is analyzed; a new sample is then placed, and the test container 20 is restarted; the remaining test containers are started or stopped individually or simultaneously in a similar manner.

[0076] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An experimental apparatus for studying the scaling behavior of corrosion products in light water reactors, characterized in that, include: Aqueous chemical preparation mechanism, used to supply test aqueous solutions; Source liquid tank (10), the inlet of which is connected to the outlet of the water chemical preparation mechanism; The test mechanism is connected to the outlet of the source liquid tank (10) via a high-pressure pump (11). The test mechanism includes multiple test containers (20) arranged in parallel. The test aqueous solution can be deposited on the surface of the sample in the test container (20). A heating mechanism capable of indirectly heating the sample inside the test container (20); The outlet of the test mechanism is connected to the final liquid tank (33) through the condenser (30), the pressure reducing valve (31) and the first measuring module (32). The final liquid tank (33) is connected to the outlet of the water chemical preparation mechanism; The final liquid tank (33) is connected to the source liquid tank (10); The test container (20) is provided with a test flow channel and a rapid cooling flow channel, and the middle part of the test flow channel and the rapid cooling flow channel are connected to the inner cavity of the test container (20); Both the inlet and outlet of the test flow channel and the rapid cooling flow channel are equipped with shut-off valves (60). The inlet of the test flow channel is connected to the source liquid tank (10); The inlet of the rapid cooling channel is connected to an inert gas cooling tank (61), and the outlet of the rapid cooling channel is connected to a waste liquid tank (62). The water chemical preparation mechanism includes: Multiple corrosion simulation units connected in parallel, each of the corrosion simulation units comprising multiple parallel culture tanks (70). An inert gas tank (71) and an oxygen tank (72) are provided, and the gas supply ports of the inert gas tank (71) and the oxygen tank (72) are respectively connected to all the culture tanks (70); Multiple metering pumps (73) are provided, each corresponding to a corrosion simulation unit and located at the outlet of the corresponding corrosion simulation unit. The outlets of all the corrosion simulation units are connected in parallel to form the outlet of the water chemical preparation mechanism.

2. The experimental apparatus for studying the scaling behavior of corrosion products in light water reactors according to claim 1, characterized in that, It also includes a heat exchanger (40), which is provided with a low-temperature flow channel and a high-temperature flow channel capable of heat exchange; The outlet of the test mechanism is connected to the inlet of the high-temperature flow channel; The outlet of the source liquid tank (10) is connected to the inlet of the low-temperature flow channel, and the outlet of the low-temperature flow channel is connected to the inlet of the test mechanism.

3. The experimental apparatus for the fouling behavior of corrosion products in light water reactors according to claim 2, characterized in that, The outlet of the low-temperature flow channel is connected to the inlet of the test mechanism through a preheater (41).

4. The experimental apparatus for measuring the fouling behavior of corrosion products in light water reactors according to claim 2, characterized in that, The outlets of all the test containers (20) are connected to a mixer (50), and the outlet of the mixer (50) is connected to the inlet of the high-temperature flow channel; The outlet of the source liquid tank (10) is connected to the mixer (50) through the liquid distribution pipe (12).

5. The experimental apparatus for measuring the fouling behavior of corrosion products in light water reactors according to claim 4, characterized in that, The inlet of the liquid separator (12) is located on the inlet side of the heat exchanger (40).

6. The experimental apparatus for measuring the fouling behavior of corrosion products in light water reactors according to claim 1, characterized in that, The outlet of the source liquid tank (10) is returned through the return pipe (13), which is equipped with a check valve (34), a filter (35) and a second measurement module (36).

7. A test method for the fouling behavior of corrosion products in light water reactors, comprising using the test apparatus for the fouling behavior of corrosion products in light water reactors as described in any one of claims 1-6, characterized in that, Includes the following steps: Corrosion products are cultured in each of the culture tanks (70) according to experimental requirements, and the metering pump (73) is adjusted to obtain the test aqueous solution in the source liquid tank (10); The test aqueous solution is introduced into the test mechanism and diverted to each of the test containers (20). The sample in the test container (20) is indirectly heated by the heating mechanism. The flow rate of each test container (20) is adjusted and the heating conditions of the sample in each test container (20) are set. Periodically and quantitatively obtain the source liquid tank (10), the final liquid tank (33) and the solution from the test container (20) at the sampling port to obtain the concentration of soluble corrosion products and insoluble corrosion product particles; When the test of any of the test containers (20) reaches the predetermined time, the solution in the test container (20) is quickly drained through the rapid cooling channel, and the sample is rapidly cooled; after it is cooled to room temperature, the sample is removed and the deposition of corrosion products on the sample surface is analyzed; and a new sample is replaced and the test container (20) is restarted; the remaining test containers are started or stopped individually or simultaneously in a similar manner.

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