Performance test device and method for passive heat export system of containment vessel

By designing a performance test device for non-active heat derivation system of the containment shell including a flowmeter, connecting pipe, heat exchange device and portable cooling device, the problem of measurement difficulties and difficulty in on-site implementation of the non-active heat derivation system debugging and verification method of the containment shell in the prior art is solved, and accurate measurement of system performance and effective field test are achieved.

CN119993583APending Publication Date: 2025-05-13JIANGSU NUCLEAR POWER CORP
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510092502.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-05-13

AI Technical Summary

Technical Problem

In the prior art, the debugging test verification method for non-active heat derivation system of the containment shell in the prior art is difficult to measure and difficult to implement on-site.

Method used

A performance test device for non-active heat derivation system of the containment shell is designed, which includes a flowmeter, connecting pipe, heat exchange device and a portable cooling device. These devices can measure and record the performance parameters of the system to achieve accurate measurement of system performance.

Benefits of technology

This device can effectively reduce the requirements of the test for the external environment and other systems, improve the working efficiency of debugging tests, and can verify the design performance of the non-active heat derivation system of the containment during on-site implementation.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119993583A_ABST
    Figure CN119993583A_ABST
Patent Text Reader

Abstract

The invention relates to the field of nuclear power plant operation debugging, in particular to a containment passive heat export system performance test device and a containment passive heat export system performance test method, the containment passive heat export system performance test device comprises a flowmeter, a connecting pipeline, a heat exchange device and a portable cooling device, the flow meter is connected with the water return side of the containment passive heat export system, and the heat exchange device is connected with the water inlet side of the containment passive heat export system; and a portable cooling device is arranged on the heat exchange device. According to the device, the performance parameters of the passive heat export system of the containment are measured through the flow meter and the heat exchange device, and accurate measurement of the parameters during the performance test of the passive heat export system of the containment can be realized.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the field of operation and commissioning of nuclear power plants, and in particular to a performance test device and method for a passive heat removal system of a containment. Background Art

[0002] The third generation of pressurized water reactor nuclear power plants are generally designed with safety systems that introduce passive design concepts. In order to ensure the reliability of the last radioactive barrier (i.e., containment) under the design expansion conditions, the third generation of pressurized water reactor nuclear power plants generally design a passive heat removal system for the containment. Among them, the passive containment heat system that combines an external water tank and a heat exchanger inside the containment has a simple design, simple engineering implementation, and can be designed and arranged together with the steam generator passive cooling system. It is a mainstream passive containment heat removal system design in the third generation of pressurized water reactor nuclear power plants and has been adopted by different reactor designs in many countries.

[0003] Since the passive heat removal system of the containment does not rely on electrical and active equipment, but only relies on temperature difference and density difference to remove heat after a reactor accident, the debugging test verification method of the passive heat removal system of the containment in the prior art is quite different from the previous test method for active components. At the same time, the test is difficult to measure and difficult to implement on site. Summary of the invention

[0004] The present invention provides a performance test device and method for a containment passive heat removal system, which are used to solve the problems in the prior art that a commissioning test verification method for a containment passive heat removal system is difficult to measure and difficult to implement on site.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention proposes a performance test device for a passive heat removal system of a containment shell. The device comprises a flow meter, a connecting pipe, a heat exchange device and a portable cooling device. The flow meter is connected to the heat exchange device through the connecting pipe, the flow meter is connected to the return water side of the passive heat removal system of the containment shell, and the heat exchange device is connected to the water inlet side of the passive heat removal system of the containment shell; and a portable cooling device is provided on the heat exchange device.

[0007] In some embodiments, a return water side thermometer is provided on the connecting pipe on the return water side of the passive heat removal system of the containment, and an inlet water side thermometer is provided at the connection between the heat exchange device and the inlet side of the passive heat removal system of the containment.

[0008] In some embodiments, the return water side thermometer adopts a resistance thermometer to measure the return water side medium temperature in the test; the inlet water side thermometer adopts a resistance thermometer to measure the inlet water side medium temperature in the test.

[0009] In some embodiments, the heat exchange device is a container made of stainless steel parts, an insulation layer is provided on the outside of the container, a heat exchange coil is installed on the container, the heat exchange coil is used to connect to a portable cooling device, and a cooling medium is provided in the container.

[0010] In some embodiments, the connecting pipe is made of PVC material, and a connecting interface, an interface valve and an exhaust valve are installed on the connecting pipe. The connecting interface is used to connect the flow meter and the heat exchange device.

[0011] In some embodiments, the portable cooling device uses air-cooled cold water, the portable cooling device is provided with a joint, the joint is connected to the heat exchange device, the cooling device is provided with a real-time display device for cooling capacity, and the outlet cooling medium temperature of the portable cooling device is adjusted between 3-40°C.

[0012] The present invention proposes a method for testing the performance of a passive heat removal system for a containment, the method comprising:

[0013] Step 1: Install the containment passive heat removal system debugging performance test device to the inlet and outlet of the containment passive heat removal system;

[0014] Step 2: Fill the containment passive heat removal system and device with desalted water;

[0015] Step 3: Start the portable cooling device to reduce the cooling medium in the heat exchange device to the test required temperature;

[0016] Step 4: Connect the passive heat removal system loop of the containment, and record the flow meter reading, the return water side thermometer reading, the inlet water side thermometer reading, and the cooling capacity of the portable cooling device;

[0017] Step 5: Calculate the design performance of the containment passive heat removal system using the parameters recorded in step 4.

[0018] In some embodiments, step one specifically includes:

[0019] Step 1.1: Install the flow meter and return water temperature meter at the return water outlet of the passive heat removal system of the containment;

[0020] Step 1.2: Install the heat exchange device and the water inlet thermometer to the water inlet inlet of the passive heat removal system of the containment;

[0021] Step 1.3: Connect the heat exchange device to the portable cooling device;

[0022] Step 1.4: Connect the heat exchange device and the flow meter through the connecting pipe.

[0023] In some embodiments, step 2 specifically includes:

[0024] Step 2.1: Connect the desalted water pipe to the interface valve on the connecting pipe;

[0025] Step 2.2: Open the loop of the passive heat removal system of the containment;

[0026] Step 2.3: Connect the heat exchange device and the passive heat removal system of the containment;

[0027] Step 2.4: Open the exhaust valve of the passive heat removal system of the containment;

[0028] Step 2.5: The desalted water pipe is used to inject desalted water into the device and the passive heat removal system of the containment, and the passive heat removal system of the containment is filled with water and exhausted;

[0029] Step 2.6: After filling with desalted water, close all components opened in the above steps.

[0030] The implementation of the present invention has the following beneficial effects:

[0031] The present invention provides a device and method for testing the commissioning performance of a containment passive heat removal system, which can verify the design performance of the containment passive heat removal system. The device measures the performance parameters of the containment passive heat removal system through a thermometer, a flow meter and a heat exchanger, and can accurately measure the parameters during the performance test of the containment passive heat removal system; the method can minimize the requirements of the containment passive heat removal system for the external environment and other systems during the performance test by connecting the device of the present invention, reduce the test requirements for the overall project progress and the impact on other system equipment, and improve the work efficiency of the commissioning test. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a performance test device for a passive heat removal system for a containment vessel proposed in an embodiment of the present invention;

[0033] Figure 2 A flow chart of a performance test method for a passive heat removal system for a containment vessel proposed in an embodiment of the present invention;

[0034] Description of the drawings: 1. Return water side thermometer; 2. Flow meter; 3. Connecting pipe; 4. Heat exchange device; 5. Inlet water side thermometer; 6. Portable cooling device. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The passive heat removal system of the containment is composed of an external water tank and a heat exchanger inside the containment. The heat exchanger transfers heat to the external water tank through a heat removal loop to achieve cooling inside the containment. Figure 1 As shown, the present invention proposes a performance test device for a passive heat removal system of a containment, characterized in that the device includes a return water side thermometer 1, a flow meter 2, a connecting pipe 3, a heat exchange device 4, a water inlet side thermometer 5 and a portable cooling device 6.

[0037] The return water side thermometer 1 is connected to the return water side of the passive heat extraction system of the containment, and the return water side thermometer 1 is connected to the heat exchange device 4 through the connecting pipe 3. The return water side thermometer 1 adopts a high-precision thermal resistance thermometer to measure the return water side medium temperature in the test. Optionally, the return water side thermometer 1 can adopt other types of high-precision thermometers that meet the measurement accuracy required by the test.

[0038] The connecting pipe 3 is made of a lightweight PVC material, and is equipped with an interface for connecting with the flow meter 2 and the heat exchange device 4, and is also equipped with a medium injection interface valve and an exhaust valve; optionally, the pipe can be made of other metal and non-metal materials, but the pipe flow resistance must be as small as possible to avoid excessive impact on the circulation flow. The flow meter 2 and the heat exchange device 4 are connected through the connecting pipe 3.

[0039] The heat exchange device 4 is connected to the water inlet side of the passive heat removal system of the containment, and a portable cooling device 6 is provided on the heat exchange device 4. The heat exchange device 4 is a container made of stainless steel parts, and a heat exchange coil is installed on the container. The heat exchange coil is used to connect the portable cooling device 6, and a cooling medium is provided in the cooling container. An insulation layer is provided on the outside of the container to reduce the amount of heat exchange between the container itself and the outside; a thermometer is provided on the container to measure the temperature of the internal medium during the test; an inlet and outlet valve and an interface are provided on the container to connect with other parts; optionally, the container can be made of other metal and non-metal materials.

[0040] The portable cooling device 6 adopts air-cooled cold water and is provided with a quick connector to connect with the heat exchange device 4. The outlet temperature of the cooling medium can be adjusted between 3-40°C. The cooling device is provided with a real-time display device for the cooling capacity. Optionally, the cooling device can adopt other principle units, and the outlet temperature of the cooling medium can be selected in different ranges according to design requirements.

[0041] The flow meter 2 is arranged on the connecting pipe 3 of the return water outlet of the passive heat removal system of the containment. The flow meter 2 adopts a high-precision float flow meter 2 to measure the circulation flow of the medium in the test; optionally, the flow meter 2 can adopt a high-precision ultrasonic or other type of flow meter 2, which must meet the measurement accuracy required by the test.

[0042] The water inlet side thermometer 5 is arranged at the connection between the heat exchange device 4 and the water inlet side of the passive heat removal system of the containment. The water inlet side thermometer 5 adopts a high-precision thermal resistance thermometer, which is used to measure the temperature of the medium on the water inlet side during the test. The thermometer is installed on the connecting pipe 3 of the heat exchange device 4; optionally, the water inlet side thermometer 5 can adopt other types of high-precision flow meters 2, which must meet the measurement accuracy required for the test.

[0043] like Figure 2 As shown, the present invention proposes a method for testing the performance of a passive heat removal system for a containment, the method comprising:

[0044] Step 1: Install the containment passive heat removal system debugging performance test device to the inlet and outlet of the containment passive heat removal system.

[0045] Step 1.1: Install the flow meter 2 and the return water temperature meter 1 to the return water outlet of the passive heat removal system of the containment.

[0046] Step 1.2: Install the heat exchange device 4 and the water inlet thermometer 5 to the water inlet inlet of the passive heat removal system of the containment.

[0047] Step 1.3: Connect the heat exchange device 4 to the portable cooling device 6.

[0048] Step 1.4: Connect the heat exchange device 4 and the flow meter 2 via the connecting pipe 3.

[0049] Step 2: Use desalted water to fill the installed and connected containment passive heat removal system and the containment passive heat removal system debugging performance test device.

[0050] Step 2.1: Connect the demineralized water pipe to the interface valve on the connecting pipe 3.

[0051] Step 2.2: Open the internal valve of the containment passive heat removal system loop.

[0052] Step 2.3: Open the valve connecting the heat exchange device 4 and the passive heat removal system of the containment.

[0053] Step 2.4: Open the exhaust valve of the heat removal system of the containment passive heat removal system.

[0054] Step 2.5: The desalted water pipe is used to inject desalted water into the containment passive heat removal system commissioning performance test device and the containment passive heat removal system, and the containment passive heat removal system is filled with water and exhausted.

[0055] Step 2.6: After the desalted water filling is completed, close all valves of the containment passive heat removal system commissioning performance test device and the containment passive heat removal system.

[0056] Step 3: Start the portable cooling device 6 to reduce the medium in the heat exchange device 4 to the test required temperature; the test required temperature refers to the temperature required during the test design of each system, and is actually selected according to different systems.

[0057] Step 4: Connect the containment passive heat removal system loop, and record the float flowmeter 2 reading, the inlet and outlet temperatures of the containment passive heat removal system, and the cooling capacity of the portable cooling device 6.

[0058] Step 4.1: Open the internal valve of the containment passive heat removal system loop.

[0059] Step 4.2: Open the connecting valve between the passive heat removal system of the containment and the device.

[0060] Step 4.3: Record the reading of the float flowmeter 2, the inlet and outlet temperatures of the containment passive heat removal system, and the cooling capacity of the portable cooling device 6.

[0061] Step 5: Verify whether the passive heat removal system of the containment meets the design performance requirements through the process parameters recorded in step 4. Specifically: obtain the inlet and outlet water enthalpy values ​​according to the inlet and outlet temperatures of the passive heat removal system of the containment, and obtain the heat exchange of the passive heat removal system of the containment according to the reading of the flow meter 2 and the basic heat transfer formula. The heat exchange is compared with the cooling capacity of the portable cooling device 6 to verify the heat exchange of the passive heat removal system of the containment. Confirm the accuracy of the heat exchange calculated by the formula by comparing the heat exchange calculated by the formula with the actual cooling capacity.

[0062] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A containment passive heat removal system performance test device, characterized in that: The device comprises a flow meter (2), a connecting pipe (3), a heat exchange device (4) and a portable cooling device (6); the flow meter (2) is connected to the heat exchange device (4) via the connecting pipe (3); the flow meter (2) is connected to the return water side of the passive heat removal system of the containment; the heat exchange device (4) is connected to the water inlet side of the passive heat removal system of the containment; and the portable cooling device (6) is provided on the heat exchange device (4).

2. A containment passive heat removal system performance test device according to claim 1, characterized in that: A return water side thermometer (1) is provided on the connection pipe (3) on the return water side of the passive heat removal system for the containment, and an inlet water side thermometer (5) is provided at the connection between the heat exchange device (4) and the inlet water side of the passive heat removal system for the containment.

3. A containment passive heat removal system performance test device according to claim 2, characterized in that: The return water side thermometer (1) adopts a thermal resistance thermometer, which is used to measure the temperature of the return water side medium in the test; the inlet water side thermometer (5) adopts a thermal resistance thermometer, which is used to measure the temperature of the inlet water side medium in the test.

4. A containment passive heat removal system performance test device according to claim 1, characterized in that: The heat exchange device (4) is a container made of stainless steel parts, an insulation layer is provided on the outside of the container, a heat exchange coil is installed on the container, the heat exchange coil is used to connect to the portable cooling device (6), and a cooling medium is provided in the container.

5. A containment passive heat removal system performance test device according to claim 1, characterized in that: The connecting pipe (3) is made of PVC material, and a connecting interface, an interface valve and an exhaust valve are installed on the connecting pipe (3), and the connecting interface is used to connect the flow meter (2) and the heat exchange device (4).

6. A containment passive heat removal system performance test device according to claim 4, characterized in that: The portable cooling device (6) uses air-cooled cold water. The portable cooling device (6) is provided with a joint, and the joint is connected to the heat exchange device (4). The cooling device is provided with a real-time display device for cooling capacity. The outlet cooling medium temperature of the portable cooling device (6) is adjusted between 3-40°C.

7. A method for testing the performance of a passive heat removal system for a containment vessel according to any one of claims 1 to 6, characterized in that: The method comprises: Step 1: Install the containment passive heat removal system debugging performance test device to the inlet and outlet of the containment passive heat removal system; Step 2: Filling the containment passive heat removal system and the device with desalted water; Step 3: Start the portable cooling device (6) to reduce the cooling medium in the heat exchange device (4) to the required test temperature; Step 4: connect the passive heat removal system loop of the containment, and record the flow meter (2), the return water side thermometer (1), the inlet water side thermometer (5), and the cooling capacity of the portable cooling device (6); Step 5: Verify whether the design performance of the passive heat removal system of the containment meets the requirements through the parameters recorded in step 4.

8. A method for testing the performance of a containment passive heat removal system according to claim 7, characterized in that: The step 1 specifically includes: Step 1.1: Install the flow meter (2) and the return water side thermometer (1) at the return water side outlet of the passive heat removal system of the containment; Step 1.2: Install the heat exchange device (4) and the water inlet side thermometer (5) at the water inlet side inlet of the passive heat removal system of the containment; Step 1.3: Connecting the heat exchange device (4) to the portable cooling device (6); Step 1.4: Connect the heat exchange device (4) and the flow meter (2) via a connecting pipe (3).

9. A method for testing the performance of a containment passive heat removal system according to claim 7, characterized in that: The step 2 specifically includes: Step 2.1: Connect the desalted water pipe to the interface valve of the connecting pipe (3); Step 2.2: Open the loop of the passive heat removal system of the containment; Step 2.3: Connecting the heat exchange device (4) to the passive heat removal system of the containment vessel; Step 2.4: Open the exhaust valve of the passive heat removal system of the containment; Step 2.5: The desalted water pipe injects desalted water into the device and the passive heat removal system of the containment, and fills and exhausts the passive heat removal system of the containment; Step 2.6: After the desalted water is filled, the heat conduction loop of the containment passive heat removal system and the connection between the containment passive heat removal system and the heat exchange device (4) are closed.

10. A method for testing the performance of a containment passive heat removal system according to claim 7, characterized in that: The step five is specifically as follows: according to the reading of the return water side thermometer (1) and the reading of the water inlet side thermometer (5), the inlet and outlet water enthalpy values ​​of the containment passive heat removal system are obtained by looking up the table, and the heat exchange capacity of the containment passive heat removal system is obtained by calculating according to the reading of the flow meter (2) and the basic heat transfer formula, and by comparing the heat exchange capacity with the cooling capacity of the portable cooling device 6, the heat exchange capacity of the containment passive heat removal system is verified.