CN114550956A - Device and method for testing leakage rate of containment mechanical penetration piece - Google Patents

Device and method for testing leakage rate of containment mechanical penetration piece Download PDF

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Publication number
CN114550956A
CN114550956A CN202210181790.2A CN202210181790A CN114550956A CN 114550956 A CN114550956 A CN 114550956A CN 202210181790 A CN202210181790 A CN 202210181790A CN 114550956 A CN114550956 A CN 114550956A
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China
Prior art keywords
isolation valve
valve
test
containment
leakage rate
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Pending
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CN202210181790.2A
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Inventor
姚尧
张瑞祥
韩传高
余俨
康祯
祁沛垚
梁舒婷
叶林
李志容
赵峰
马喜强
孙文钊
王宇航
高美
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Priority to CN202210181790.2A priority Critical patent/CN114550956A/en
Publication of CN114550956A publication Critical patent/CN114550956A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/002—Detection of leaks
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/001—Mechanical simulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention discloses a test device and a test method for the leakage rate of a containment mechanical penetration piece, and the test device comprises a first isolation valve, a first test valve, a second isolation valve, a pressure source, a second test valve, a containment and a third isolation valve; the device and the method can accurately measure and calculate the leakage rate of the isolation valve.

Description

Device and method for testing leakage rate of containment mechanical penetration piece
Technical Field
The invention belongs to the field of containment vessel leakage rate tests, and relates to a containment vessel mechanical penetration piece leakage rate test device and method.
Background
According to the leakage rate test result of the conventional general containment mechanical penetration piece in the nuclear power plant, the leakage rate of the general containment penetration piece is very low according to the leaked water replenishing flow, the precision requirement on a water replenishing flowmeter is very high, and the instrument investment cost is high. During the measurement of the leakage rate, the leakage rate of the two isolation valves at the upstream and the downstream is estimated to be the leakage rate of a certain valve by adopting conservative estimation, so that the obtained leakage rate is larger than an actual value, and a larger error exists.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a containment mechanical penetration leakage rate testing device and method, and the device and method can accurately measure and calculate the leakage rate of an isolation valve.
In order to achieve the purpose, the containment vessel mechanical penetration piece leakage rate testing device comprises a first isolation valve, a first test valve, a second isolation valve, a pressure source, a second test valve, a containment vessel and a third isolation valve;
the first isolation valve is communicated with one end of the first test valve and one end of the second isolation valve, the other end of the first test valve is communicated with an outlet of the pressure source and one end of the second test valve, the other end of the second test valve and the other end of the second isolation valve are communicated with one end of the through pipeline, the other end of the through pipeline penetrates through the containment and then is communicated with the third isolation valve, and the pressure source is provided with measuring equipment.
The pressure source is a compressed air tank.
The outlet of the compressed air tank is communicated with the first test valve and the second test valve through a converging main pipe.
The measuring equipment comprises a first pressure gauge and an environment thermometer, wherein the first pressure gauge is arranged in the compressed air tank, the environment thermometer is positioned outside the compressed air tank, and the environment thermometer is positioned in the containment.
The pressure source is a pressure stabilizing water tank, a water space at the bottom and an air space at the top are arranged in the pressure stabilizing water tank, and an outlet of the water space is communicated with the first test valve and the second test valve.
The system comprises a containment system and an outside containment system, wherein the inside containment system is communicated with the outside containment system through a first isolation valve, a second isolation valve, a through pipeline and a third isolation valve.
The measuring equipment comprises a second pressure gauge and a liquid level meter, wherein the liquid level meter is arranged in the pressure stabilizing water tank, and the second pressure gauge is arranged on a pipeline between the water space and the second test valve.
The outlet of the pressure stabilizing water tank is communicated with the first test valve and the second test valve through a converging main pipe.
The invention relates to a test method for the leakage rate of a mechanical penetration piece of a containment vessel, which comprises the following steps:
1) closing the first isolation valve and the second isolation valve;
2) opening the first test valve, inflating and pressurizing a pipeline between the first isolation valve and the second isolation valve to the design pressure P of the containment vessel, and keeping the stability;
3) after the system pressure is stable, recording the numerical values of a first pressure gauge and an environmental thermometer and the temperature T1;
4) after the voltage stabilization test is carried out for a preset time T, recording the numerical values P2 and the temperature T2 of the first pressure gauge and the environmental thermometer;
5) calculating the total leakage rate Qa of the first isolation valve and the second isolation valve according to P1, P2, T1, T2 and T;
6) closing the first test valve and the third isolation valve;
7) opening the first isolation valve, and reducing the pressure of the pipeline between the first isolation valve and the second isolation valve to normal pressure;
8) opening a second test valve, inflating and pressurizing the penetrating pipeline between the second isolation valve and a third isolation valve to the design pressure P of the containment vessel, and keeping the pressure stable;
9) repeating the step 3) to the step 5), and calculating the total leakage rate Qb of the second isolation valve and the third isolation valve;
10) closing the first isolation valve;
11) opening the first test valve, inflating and pressurizing a pipeline between the first isolation valve and the third isolation valve to the design pressure P of the containment vessel, and keeping the stability;
12) repeating the steps 3) to 5), and calculating the total leakage rate Qc of the first isolation valve and the third isolation valve;
13) calculating the leakage rate of the first isolation valve: q1 ═ (Qa-Qb + Qc)/2;
calculating the leakage rate of the second isolation valve: q2 ═ (Qa + Qb-Qc)/2;
calculating the leakage rate of the third isolation valve: q3 ═ Qa + Qb + Qc)/2.
The invention relates to a test method for the leakage rate of a mechanical penetration piece of a containment vessel, which comprises the following steps:
1) closing the first isolation valve and the second isolation valve, and opening the third isolation valve;
2) opening the first test valve, and filling water into the pipeline between the first isolation valve and the second isolation valve by gravity until the pipeline is full;
3) inflating and pressurizing water in the water space through the air space until the pressure measured by the second pressure gauge is the design pressure P of the containment vessel and keeping the pressure stable;
4) recording the value H1 of the liquid level meter;
5) after the pressure stabilizing test is carried out for a preset time t, recording the numerical value H2 of the liquid level meter;
6) calculating the total leakage rate Qa of the first isolation valve and the second isolation valve according to H1, H2 and t;
7) closing the third isolation valve and the first test valve;
8) opening the first isolation valve, and reducing the pressure of the pipeline between the first isolation valve and the second isolation valve to normal pressure;
9) opening the first test valve, and filling water into the through pipeline by gravity until the through pipeline is full;
10) repeating the steps 3) to 6), and calculating the total leakage rate Qb of the second isolation valve and the third isolation valve;
11) closing the first isolation valve, opening the first test valve, and filling water into the pipeline between the first isolation valve and the second isolation valve by gravity until the pipeline is full;
12) repeating the steps 3) to 6), and calculating the total leakage rate Qc of the first isolation valve and the third isolation valve;
13) calculating the leakage rate of the first isolation valve: q4 ═ (Qa-Qb + Qc)/2;
calculating the leakage rate of the second isolation valve: q5 ═ (Qa + Qb-Qc)/2;
calculating the leakage rate of the third isolation valve: q6 ═ Qa + Qb + Qc)/2.
The invention has the following beneficial effects:
when the test device and the test method for the leakage rate of the mechanical penetration piece of the containment vessel are specifically operated, the isolation valve needing to be measured for leakage and the adjacent isolation valve are closed, other valves on a connected pipeline are opened, pressure medium is injected into the pipeline between the two isolation valves, the pressure is maintained at a designed value for a period of time, the total leakage rate of the two isolation valves is calculated according to the pressure variation of the pressure medium, the steps are repeated, the total leakage rate of the isolation valve and the adjacent isolation valves is calculated, the leakage rate of each isolation valve is finally obtained, and the measurement precision is high.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment;
fig. 2 is a schematic structural diagram of the second embodiment.
Wherein, 1 is an in-containment system, 2 is a first isolation valve, 3 is a second isolation valve, 4 is a through pipeline, 5 is a containment, 6 is a third isolation valve, 7 is an out-of-containment system, 8 is a first test valve, 9 is a second test valve, 10 is a pressure source, 10-1 is a water space, 10-2 is a gas space, 10-3 is a liquid level meter, 11 is a second pressure gauge, 12 is an environmental thermometer, and 13 is a first pressure gauge.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the containment mechanical penetration leakage rate testing device according to the present invention includes a first isolation valve 2, a first test valve 8, a second isolation valve 3, a pressure source 10, a second test valve 9, a containment 5, and a third isolation valve 6;
the first isolation valve 2 is communicated with one end of the first test valve 8 and one end of the second isolation valve 3, the other end of the first test valve 8 is communicated with an outlet of the pressure source 10 and one end of the second test valve 9, the other end of the second test valve 9 and the other end of the second isolation valve 3 are communicated with one end of the through pipeline 4, the other end of the through pipeline 4 penetrates through the containment vessel 5 and then is communicated with the third isolation valve 6, and the pressure source 10 is provided with a measuring device.
Example one
Referring to fig. 1, the pressure source 10 is a compressed air tank, and the measuring apparatus includes a first pressure gauge 13 and an ambient temperature gauge 12, wherein the first pressure gauge 13 is disposed in the compressed air tank, the ambient temperature gauge 12 is disposed outside the compressed air tank, the ambient temperature gauge 12 is disposed in the containment 5, and an outlet of the compressed air tank is communicated with the first test valve 8 and the second test valve 9 through a converging main pipe.
The specific working process of this embodiment is as follows:
1) closing the first isolation valve 2 and the second isolation valve 3;
2) opening the first test valve 8, inflating and pressurizing the pipeline between the first isolation valve 2 and the second isolation valve 3 to the design pressure P of the containment vessel 5, and keeping the pipeline stable;
3) after the system pressure is stabilized, recording the values P1 and the temperature T1 of the first pressure gauge 13 and the environmental thermometer 12;
4) after the voltage stabilization test is carried out for a preset time T, recording the numerical values P2 and the temperature T2 of the first pressure gauge 13 and the environmental thermometer 12;
5) calculating the total leakage rate Qa of the first isolation valve 2 and the second isolation valve 3 according to P1, P2, T1, T2 and T;
6) closing the first test valve 8 and the third isolation valve 6;
7) opening the first isolation valve 2, and reducing the pressure of the pipeline between the first isolation valve 2 and the second isolation valve 3 to normal pressure;
8) opening a second test valve 9, inflating and pressurizing the penetrating pipeline 4 between the second isolation valve 3 and the third isolation valve 6 to the design pressure P of the containment vessel 5, and keeping the pressure stable;
9) repeating the steps 3) to 5), and calculating the total leakage rate Qb of the second isolation valve 3 and the third isolation valve 6;
10) closing the first isolation valve 2;
11) opening the first test valve 8, inflating and pressurizing a pipeline between the first isolation valve 2 and the third isolation valve 6 to the design pressure P of the containment vessel 5, and keeping the pipeline stable;
12) repeating the steps 3) to 5), and calculating the total leakage rate Qc of the first isolation valve 2 and the third isolation valve 6;
13) calculate the leak rate of the first isolation valve 2: q1 ═ (Qa-Qb + Qc)/2;
calculate the leak rate of the second isolation valve 3: q2 ═ (Qa + Qb-Qc)/2;
calculate the leak rate of the third isolation valve 6: q3 ═ Qa + Qb + Qc)/2.
Example two
Referring to fig. 2, the pressure source 10 is a surge tank, a water space 10-1 at the bottom and an air space 10-2 at the top are arranged in the surge tank, an outlet of the water space 10-1 is communicated with a first test valve 8 and a second test valve 9, the measuring equipment comprises a second pressure gauge 11 and a liquid level gauge 10-3, wherein, the liquid level meter 10-3 is arranged in the pressure stabilizing water tank, the second pressure meter 11 is arranged on a pipeline between the water space 10-1 and the second test valve 9, in addition, the invention also comprises an inner containment system 1 and an outer containment system 7, the in-containment system 1 is communicated with an out-containment system 7 through a first isolation valve 2, a second isolation valve 3, a through pipeline 4 and a third isolation valve 6, and an outlet of the pressure stabilizing water tank is communicated with a first test valve 8 and a second test valve 9 through a converging main pipe.
The specific working process of this embodiment is as follows:
1) closing the first isolation valve 2 and the second isolation valve 3, and opening the third isolation valve 6;
2) opening the first test valve 8, and filling water into the pipeline between the first isolation valve 2 and the second isolation valve 3 by gravity until the pipeline is full;
3) inflating and pressurizing the water in the water space 10-1 through the air space 10-2 until the pressure measured by the second pressure gauge 11 is the design pressure P of the containment vessel 5 and keeping the pressure stable;
4) recording the value H1 of the liquid level meter 10-3;
5) after the pressure stabilizing test is carried out for a preset time t, recording the value H2 of the liquid level meter 10-3;
6) calculating the total leakage rate Qa of the first isolation valve 2 and the second isolation valve 3 according to H1, H2 and t;
7) closing the third isolation valve 6 and the first test valve 8;
8) opening the first isolation valve 2, and reducing the pressure of the pipeline between the first isolation valve 2 and the second isolation valve 3 to normal pressure;
9) opening the first test valve 8, and filling water into the through pipeline 4 by gravity until the through pipeline is full;
10) repeating the steps 3) to 6), and calculating the total leakage rate Qb of the second isolation valve 3 and the third isolation valve 6;
11) closing the first isolation valve 2, opening the first test valve 8, and filling water into the pipeline between the first isolation valve 2 and the second isolation valve 3 by gravity until the pipeline is full;
12) repeating the steps 3) to 6), and calculating the total leakage rate Qc of the first isolation valve 2 and the third isolation valve 6;
13) calculate the leak rate of the first isolation valve 2: q4 ═ (Qa-Qb + Qc)/2;
calculate the leak rate of the second isolation valve 3: q5 ═ (Qa + Qb-Qc)/2;
calculate the leak rate of the third isolation valve 6: q6 ═ Qa + Qb + Qc)/2.
The invention does not need a high-precision water replenishing flowmeter, saves cost, can accurately calculate the leakage rate of each isolation valve, and is suitable for containment penetration pieces of various media.

Claims (10)

1. The containment mechanical penetration piece leakage rate testing device is characterized by comprising a first isolation valve (2), a first testing valve (8), a second isolation valve (3), a pressure source (10), a second testing valve (9), a containment (5) and a third isolation valve (6);
the first isolation valve (2) is communicated with one end of the first test valve (8) and one end of the second isolation valve (3), the other end of the first test valve (8) is communicated with an outlet of the pressure source (10) and one end of the second test valve (9), the other end of the second test valve (9) and the other end of the second isolation valve (3) are communicated with one end of the through pipeline (4), the other end of the through pipeline (4) penetrates through the containment (5) and then is communicated with the third isolation valve (6), and the pressure source (10) is provided with a measuring device.
2. The containment mechanical penetration leak rate test apparatus of claim 1, wherein the pressure source (10) is a compressed air tank.
3. The containment mechanical penetration leak rate test device of claim 2, wherein the outlet of the compressed air tank is communicated with the first test valve (8) and the second test valve (9) through a confluence main pipe.
4. The containment mechanical penetration leak rate test device according to claim 3, wherein the measurement equipment comprises a first pressure gauge (13) and an environmental thermometer (12), wherein the first pressure gauge (13) is disposed in the compressed air tank, the environmental thermometer (12) is disposed outside the compressed air tank, and the environmental thermometer (12) is disposed in the containment (5).
5. The containment mechanical penetration leakage rate test device according to claim 1, wherein the pressure source (10) is a surge tank, a bottom water space (10-1) and a top air space (10-2) are arranged in the surge tank, and an outlet of the water space (10-1) is communicated with the first test valve (8) and the second test valve (9).
6. The containment mechanical penetration leakage rate test device according to claim 5, further comprising an in-containment system (1) and an out-of-containment system (7), wherein the in-containment system (1) is communicated with the out-of-containment system (7) through the first isolation valve (2), the second isolation valve (3), the penetration pipeline (4) and the third isolation valve (6).
7. The containment mechanical penetration leak rate test device according to claim 6, wherein the measuring equipment comprises a second pressure gauge (11) and a liquid level gauge (10-3), wherein the liquid level gauge (10-3) is arranged in the pressure stabilizing water tank, and the second pressure gauge (11) is arranged on a pipeline between the water space (10-1) and the second test valve (9).
8. The containment mechanical penetration leakage rate test device according to claim 7, wherein the outlet of the surge tank is communicated with the first test valve (8) and the second test valve (9) through a confluence main pipe.
9. A containment mechanical penetration leakage rate test method is characterized in that the containment mechanical penetration leakage rate test device based on the claim 4 comprises the following steps:
1) closing the first isolation valve (2) and the second isolation valve (3);
2) opening the first test valve (8), inflating and pressurizing a pipeline between the first isolation valve (2) and the second isolation valve (3) to the design pressure P of the containment vessel (5), and keeping the pipeline stable;
3) after the system pressure is stabilized, recording the values P1 and T1 of a first pressure gauge (13) and an environmental thermometer (12);
4) after the pressure stabilizing test is carried out for a preset time T, recording the values P2 and the temperature T2 of a first pressure gauge (13) and an environmental thermometer (12);
5) calculating the total leakage rate Qa of the first isolation valve (2) and the second isolation valve (3) according to P1, P2, T1, T2 and T;
6) closing the first test valve (8) and the third isolation valve (6);
7) opening the first isolation valve (2), and reducing the pressure of a pipeline between the first isolation valve (2) and the second isolation valve (3) to normal pressure;
8) opening a second test valve (9), inflating and pressurizing the penetrating pipeline (4) between the second isolation valve (3) and the third isolation valve (6) to the design pressure P of the containment vessel (5), and keeping the pressure stable;
9) repeating the step 3) to the step 5), and calculating the total leakage rate Qb of the second isolation valve (3) and the third isolation valve (6);
10) closing the first isolation valve (2);
11) opening the first test valve (8), inflating and pressurizing a pipeline between the first isolation valve (2) and the third isolation valve (6) to the design pressure P of the containment vessel (5), and keeping the pipeline stable;
12) repeating the steps 3) to 5), and calculating the total leakage rate Qc of the first isolation valve (2) and the third isolation valve (6);
13) calculating the leakage rate of the first isolation valve (2): q1 ═ (Qa-Qb + Qc)/2;
calculating the leakage rate of the second isolation valve (3): q2 ═ (Qa + Qb-Qc)/2;
calculating the leakage rate of the third isolation valve (6): q3 ═ Qa + Qb + Qc)/2.
10. A containment mechanical penetration leakage rate test method is characterized in that the containment mechanical penetration leakage rate test device based on the claim 8 comprises the following steps:
1) closing the first isolation valve (2) and the second isolation valve (3), and opening the third isolation valve (6);
2) opening the first test valve (8), and filling water into the pipeline between the first isolation valve (2) and the second isolation valve (3) by gravity until the pipeline is full of water;
3) the water in the water space (10-1) is inflated and pressurized through the air space (10-2) until the pressure measured by the second pressure gauge (11) is the design pressure P of the containment (5) and is kept stable;
4) recording the value H1 of the liquid level meter (10-3);
5) after the pressure stabilizing test is carried out for a preset time t, recording the value H2 of the liquid level meter (10-3);
6) calculating the total leakage rate Qa of the first isolation valve (2) and the second isolation valve (3) according to H1, H2 and t;
7) closing the third isolation valve (6) and the first test valve (8);
8) opening the first isolation valve (2), and reducing the pressure of a pipeline between the first isolation valve (2) and the second isolation valve (3) to normal pressure;
9) opening the first test valve (8), and filling water into the through pipeline (4) by gravity until the through pipeline is full;
10) repeating the steps 3) to 6), and calculating the total leakage rate Qb of the second isolation valve (3) and the third isolation valve (6);
11) closing the first isolation valve (2), opening the first test valve (8), and filling water into the pipeline between the first isolation valve (2) and the second isolation valve (3) by gravity until the pipeline is full;
12) repeating the steps 3) to 6), and calculating the total leakage rate Qc of the first isolation valve (2) and the third isolation valve (6);
13) calculating the leakage rate of the first isolation valve (2): q4 ═ (Qa-Qb + Qc)/2;
calculating the leakage rate of the second isolation valve (3): q5 ═ (Qa + Qb-Qc)/2;
calculating the leakage rate of the third isolation valve (6): q6 ═ Qa + Qb + Qc)/2.
CN202210181790.2A 2022-02-25 2022-02-25 Device and method for testing leakage rate of containment mechanical penetration piece Pending CN114550956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210181790.2A CN114550956A (en) 2022-02-25 2022-02-25 Device and method for testing leakage rate of containment mechanical penetration piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210181790.2A CN114550956A (en) 2022-02-25 2022-02-25 Device and method for testing leakage rate of containment mechanical penetration piece

Publications (1)

Publication Number Publication Date
CN114550956A true CN114550956A (en) 2022-05-27

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Application Number Title Priority Date Filing Date
CN202210181790.2A Pending CN114550956A (en) 2022-02-25 2022-02-25 Device and method for testing leakage rate of containment mechanical penetration piece

Country Status (1)

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