Test system for testing performance of pressure suppression nozzle and test method thereof

Abstract

The application discloses a test system for the performance of a pressure-restraining nozzle and a test method thereof. The test system for the performance of the pressure-restraining nozzle comprises a pressure-restraining water tank for mounting the pressure-restraining nozzle, a steam stabilizer, a steam pipeline, an exhaust pipeline and a liquid discharge pipeline. The end of the steam pipeline is communicated with the pressure-restraining nozzle to be tested. A stop valve, a flowmeter, a quick-opening valve and a regulating valve are sequentially arranged in the inlet-to-outlet direction of the steam pipeline. The two ends of the steam pipeline are communicated with the steam stabilizer and the pressure-restraining water tank respectively. The exhaust pipeline is communicated with the steam pipeline between the flowmeter and the quick-opening valve. The liquid discharge pipeline is communicated with the liquid discharge port of the steam stabilizer. The test system for the performance of the pressure-restraining nozzle can quantitatively obtain the pressure-restraining effect of the nozzle when the pressure-restraining nozzle sprays a target amount of steam into the pressure-restraining water tank, so as to judge whether the performance of the pressure-restraining nozzle reaches the standard, thereby effectively evaluating the pressure-restraining capacity of the pressure-restraining nozzle.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant performance testing technology, and in particular to a testing system and method for pressure suppression nozzle performance. Background Technology

[0002] The containment vessel is the last line of defense for radioactive containment in a nuclear power system, and it must be protected at all times from the uncontrolled release of radioactive materials due to overpressure rupture of the containment structure. To prevent containment overpressure, boiling water reactors and floating nuclear power plants employ containment pressure relief systems to release pressure into the pressure relief pool. The pressure relief nozzle is a key component of this system, and its performance directly affects the pressure relief effect after an accident, making it particularly important for the safety of the containment.

[0003] However, there is no existing device or method for testing pressure-suppressing nozzles. Summary of the Invention

[0004] The main objective of this invention is to provide a testing system and method for the performance of pressure-suppressing nozzles, which facilitates the testing of the performance of pressure-suppressing nozzles.

[0005] To achieve the above objectives, the present invention provides a testing system for the performance of a pressure-suppressing nozzle, comprising a pressure-suppressing water tank, a steam pressure regulator, a steam pipeline, an exhaust pipeline, and a drain pipeline for mounting the pressure-suppressing nozzle, wherein...

[0006] The end of the steam pipeline is connected to the pressure suppressing nozzle to be tested. A shut-off valve, a flow meter, a quick-opening valve, and a regulating valve are installed sequentially from the inlet to the outlet of the steam pipeline. The two ends of the steam pipeline are connected to the steam pressure regulator and the pressure suppressing water tank, respectively. The exhaust pipeline is connected to the steam pipeline between the flow meter and the quick-opening valve. The drain pipeline is connected to the drain port of the steam pressure regulator.

[0007] Preferably, the steam pressure regulator is equipped with a heating device.

[0008] Preferably, the pressure-suppressing water tank is equipped with a pressure gauge, a liquid level sensor, and a temperature sensor.

[0009] Preferably, the testing system for the performance of the pressure-suppressing nozzle further includes an expansion tank connected to the pressure-suppressing water tank.

[0010] Preferably, a flow meter, a pressure gauge, and a temperature measuring device are installed on the steam pipeline.

[0011] Preferably, the steam pressure regulator is equipped with a pressure gauge, a liquid level sensor, and a temperature sensor.

[0012] This invention further proposes a testing method based on the above-described testing system for suppressing nozzle performance, comprising the following steps:

[0013] Turn on the heating device of the steam pressure regulator to generate steam, and drain the water inside the steam pressure regulator through the drain pipe;

[0014] When the internal pressure of the steam pressure regulator rises to the first preset pressure, the shut-off valve of the steam pipeline is opened. When the internal pressure of the steam pressure regulator rises to the second preset pressure, the quick-opening valve of the steam pipeline is opened. After adjusting the flow rate of the steam pipeline to the target flow rate through the regulating valve according to the flow meter of the steam pipeline, the quick-opening valve is closed.

[0015] Fill the pressure-suppressing water tank with water and heat it to the preset temperature. Place the pressure-suppressing nozzle inside the pressure-suppressing water tank and connect it to the steam pipeline.

[0016] Open the quick-opening valve of the steam pipeline, and the steam in the steam pipeline enters the pressure-suppressing nozzle to heat the water in the pressure-suppressing water tank. Record the final temperature of the pressure-suppressing water tank when it is heated for the preset time, and calculate the steam energy absorbed by the pressure-suppressing water tank within the target time based on the final temperature.

[0017] Preferably, at least three sets of experiments are recorded to calculate the final temperature of the pressure-suppressing water tank during the preset heating time, in order to calculate the steam energy.

[0018] The present invention proposes a testing system for pressure-suppressing nozzle performance. By injecting a target amount of steam into a pressure-suppressing water tank through the nozzle, the pressure-suppressing effect of the nozzle can be quantitatively obtained, thereby determining whether the pressure-suppressing nozzle performance meets the standards and effectively evaluating its pressure-suppressing capability. This testing system for pressure-suppressing nozzle performance has the advantages of simple structure, stable and reliable operation, and ease of implementation. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the working process of the testing system for suppressing nozzle performance according to the present invention.

[0020] Figure 2 This is a system layout diagram of the test system for suppressing nozzle performance according to the present invention.

[0021] In the diagram, 1-pressure suppressing water tank, 2-steam pressure stabilizer, 3-steam pipeline, 31-stop valve, 32-flow meter, 33-quick-opening valve, 34-regulating valve, 4-exhaust pipeline, 5-drainage pipeline, 6-expansion tank, 7-pressure suppressing nozzle.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] It should be noted that in the description of this invention, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] This invention proposes a testing system for suppressing nozzle performance.

[0026] In this preferred embodiment, a testing system for the performance of a pressure-suppressing nozzle includes a pressure-suppressing water tank 1, a steam pressure regulator 2, a steam pipeline 3, an exhaust pipeline, and a drain pipeline for installing the pressure-suppressing nozzle.

[0027] The end of the steam pipeline 3 is connected to the pressure suppressing nozzle to be tested. From the inlet to the outlet of the steam pipeline 3, a shut-off valve 31, a flow meter 32, a quick-opening valve 33 and a regulating valve 34 are installed in sequence. The two ends of the steam pipeline 3 are connected to the steam pressure stabilizer 2 and the pressure suppressing water tank 1, respectively. The exhaust pipeline is connected to the steam pipeline 3 between the flow meter 32 and the quick-opening valve 33. The drain pipeline is connected to the drain port of the steam pressure stabilizer 2.

[0028] Furthermore, a heating device is installed inside the steam pressure regulator 2. A pressure gauge, a liquid level sensor, and a temperature sensor are also installed inside the steam pressure regulator 2.

[0029] Furthermore, the pressure-suppressing water tank 1 is equipped with a pressure gauge, a liquid level sensor, and a temperature sensor.

[0030] Furthermore, the testing system for the performance of the pressure-suppressing nozzle is characterized by including an expansion tank 6 connected to the pressure-suppressing water tank 1. Water can be supplied to the pressure-suppressing water tank 1 through the expansion tank 6.

[0031] In this embodiment, a flow meter 32, a pressure gauge and a temperature measuring device are installed on the steam pipeline 3.

[0032] The working process of this test system for suppressing nozzle performance is as follows:

[0033] (1) Test circuit preparation: Check whether all valves, flow meters 32, etc. are working properly;

[0034] (2) Vent the voltage regulator; turn on the heating rod of the voltage regulator, raise the temperature to above 100°C, and continue for 30 minutes to discharge the non-condensable gas in the water through the exhaust pipe;

[0035] (3) Establish the pressure regulator liquid level: Open the drain valve on the drain pipe of the pressure regulator, and at the same time increase the heating power of the pressure regulator to generate steam to drain the water in the pressure regulator and establish the corresponding liquid level;

[0036] (4) Pipeline purging: When the pressure regulator pressure rises to 1MPa, open the shut-off valve 31 of the steam pipeline 3 to purge the pipeline;

[0037] (5) Establish valve position: When the pressure regulator pressurizes to the target pressure, open the quick-opening valve 33 of the steam pipeline 3, slowly adjust the regulating valve 34 from the closed position, and adjust it until the flow meter 32 indicates the target flow rate. Then close the quick-opening valve 33 and maintain the existing valve position of the regulating valve 34 for subsequent tests.

[0038] (6) Establish the state of the pressure-suppressing water tank 1: By injecting water and spraying a small amount of steam into the pressure-suppressing water tank 1, the pressure-suppressing water tank 1 reaches the initial target liquid level and target temperature;

[0039] (7) Conduct the test: Keep the pressure and liquid level of the pressure regulator at the initial target state, open the quick-opening valve 33, and close the quick-opening valve 33 when the discharge energy of the pressure suppressing nozzle 7 reaches the target value. During the discharge, continuously record the test data and take the data at the time when the discharge energy reaches the target as the single test result.

[0040] (8) Restore the pressure stabilizer and pressure-suppressing water tank 1 to their initial target state and conduct repeatability tests;

[0041] (9) Take the average of the results of the three tests as the basis for judgment;

[0042] (10) Since the pressure suppressing water tank 1 is equipped with pressure, liquid level and water temperature measuring points, by calculating the difference in total enthalpy of the water in the tank before and after the experiment, the steam energy absorbed by the pressure suppressing water tank 1 in the target time can be obtained, so as to realize the quantitative investigation of the pressure suppressing effect of the pressure suppressing nozzle 7.

[0043] The present invention proposes a testing system for pressure-suppressing nozzle performance. By injecting a target amount of steam into a pressure-suppressing water tank 1 through the pressure-suppressing nozzle, the pressure-suppressing effect of the nozzle can be quantitatively obtained, thereby determining whether the pressure-suppressing nozzle performance meets the standards and effectively evaluating its pressure-suppressing capability. This testing system for pressure-suppressing nozzle performance has the advantages of simple structure, stable and reliable operation, and ease of implementation.

[0044] The present invention further proposes a test method for a test system for suppressing nozzle performance.

[0045] In this preferred embodiment, a test method based on the above-described test system for suppressing nozzle performance includes the following steps:

[0046] Step S1: Turn on the heating device of the steam pressure regulator 2 to generate steam, and drain the water inside the steam pressure regulator 2 through the drain pipe.

[0047] Step S2: When the internal pressure of the steam pressure regulator 2 rises to the first preset pressure, open the shut-off valve 31 of the steam pipeline 3. When the internal pressure of the steam pressure regulator 2 rises to the second preset pressure, open the quick-opening valve 33 of the steam pipeline 3. Adjust the flow rate of the steam pipeline 3 to the target flow rate through the regulating valve 34 according to the flow meter 32 of the steam pipeline 3, and then close the quick-opening valve 33.

[0048] Step S3: Fill the pressure-suppressing water tank 1 with water and heat it to the preset temperature. Place the pressure-suppressing nozzle inside the pressure-suppressing water tank 1 and connect it to the steam pipe 3.

[0049] Step S4: Open the quick-opening valve 33 of the steam pipeline 3. The steam in the steam pipeline 3 enters the pressure-suppressing nozzle to heat the water in the pressure-suppressing water tank 1. Record the final temperature of the pressure-suppressing water tank 1 when it is heated for a preset time. Calculate the steam energy absorbed by the pressure-suppressing water tank 1 within the target time based on the final temperature.

[0050] In step S4, at least three sets of experiments are recorded to calculate the final temperature of the pressure-suppressing water tank 1 after heating for a preset time, thereby calculating the steam energy. Using at least three sets of data and calculating the average of the three sets of data to calculate the steam energy results in a more accurate performance indicator.

[0051] The testing method proposed in this invention is simple and easy to operate.

[0052] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A test method for a test system for suppressing nozzle performance, characterized in that, The testing system for pressure-suppressing nozzle performance includes a pressure-suppressing water tank, a steam regulator, steam piping, an exhaust piping, and a drain piping for installing the pressure-suppressing nozzle. The end of the steam pipeline is connected to the pressure suppressing nozzle to be tested. A shut-off valve, a flow meter, a quick-opening valve and a regulating valve are installed sequentially from the inlet to the outlet of the steam pipeline. The two ends of the steam pipeline are connected to the steam pressure stabilizer and the pressure suppressing water tank, respectively. The exhaust pipeline is connected to the steam pipeline between the flow meter and the quick-opening valve. The drain pipeline is connected to the drain port of the steam pressure stabilizer. The test method for a test system for suppressing nozzle performance includes the following steps: Turn on the heating device of the steam pressure regulator to generate steam, and drain the water inside the steam pressure regulator through the drain pipe; When the internal pressure of the steam pressure regulator rises to the first preset pressure, the shut-off valve of the steam pipeline is opened. When the internal pressure of the steam pressure regulator rises to the second preset pressure, the quick-opening valve of the steam pipeline is opened. After adjusting the flow rate of the steam pipeline to the target flow rate through the regulating valve according to the flow meter of the steam pipeline, the quick-opening valve is closed. Fill the pressure-suppressing water tank with water and heat it to the preset temperature. Place the pressure-suppressing nozzle inside the pressure-suppressing water tank and connect it to the steam pipeline. Open the quick-opening valve of the steam pipeline, and the steam in the steam pipeline enters the pressure-suppressing nozzle to heat the water in the pressure-suppressing water tank. Record the final temperature of the pressure-suppressing water tank when it is heated for the preset time, and calculate the steam energy absorbed by the pressure-suppressing water tank within the target time based on the final temperature.

2. The test method for the test system for suppressing nozzle performance as described in claim 1, characterized in that, The steam pressure regulator is equipped with a heating device.

3. The test method for the test system for suppressing nozzle performance as described in claim 1, characterized in that, The pressure-suppressing water tank is equipped with a pressure gauge, a liquid level sensor, and a temperature sensor.

4. The test method for the test system for suppressing nozzle performance as described in claim 1, characterized in that, It also includes an expansion tank connected to the pressure-suppressing water tank.

5. The test method for the test system for suppressing nozzle performance as described in claim 1, characterized in that, The steam pipeline is equipped with a flow meter, a pressure gauge, and a temperature measuring device.

6. The test method for the test system for suppressing nozzle performance as described in any one of claims 1 to 5, characterized in that, The steam pressure regulator is equipped with a pressure gauge, a liquid level sensor, and a temperature sensor.

7. The test method for the test system for suppressing nozzle performance as described in claim 6, characterized in that, Record at least three sets of experiments to calculate the final temperature of the pressure-suppressing water tank when it is heated for the preset time, and then calculate the steam energy.

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