CN116092707A - Device and method for monitoring coolant leakage of containment outside system pipeline - Google Patents

Device and method for monitoring coolant leakage of containment outside system pipeline Download PDF

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Publication number
CN116092707A
CN116092707A CN202111305352.4A CN202111305352A CN116092707A CN 116092707 A CN116092707 A CN 116092707A CN 202111305352 A CN202111305352 A CN 202111305352A CN 116092707 A CN116092707 A CN 116092707A
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CN
China
Prior art keywords
flow
containment
coolant
unit
real
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Pending
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CN202111305352.4A
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Chinese (zh)
Inventor
梁超佳
李忠意
王源
王洪涛
熊国华
陆秀生
周洁
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China General Nuclear Power Corp
China Nuclear Power Technology Research Institute Co Ltd
CGN Power Co Ltd
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China General Nuclear Power Corp
China Nuclear Power Technology Research Institute Co Ltd
CGN Power Co Ltd
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Application filed by China General Nuclear Power Corp, China Nuclear Power Technology Research Institute Co Ltd, CGN Power Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN202111305352.4A priority Critical patent/CN116092707A/en
Publication of CN116092707A publication Critical patent/CN116092707A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/02—Preventing, monitoring, or locating loss
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention discloses a monitoring device and a monitoring method for coolant leakage of a containment outside system pipeline, wherein the monitoring device comprises: the process system is positioned outside the containment and connected with a coolant loop positioned in the containment through a pipeline; a first flow measuring unit, which is positioned on a pipeline of the coolant loop flowing out of the containment, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing out of the containment; a second flow measuring unit, which is positioned on a pipeline of the primary circuit of the inflow coolant, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing into the containment vessel; the computing unit is used for performing deviation computation on real-time measurement results of the first flow measurement unit and the second flow measurement unit and performing deviation computation on accumulated measurement results of the first flow measurement unit and the second flow measurement unit; and the judging unit is used for judging that the coolant leaks from the system pipeline outside the containment when the deviation calculation results of the real-time measurement result and the accumulated measurement result are both larger than the set value.

Description

Device and method for monitoring coolant leakage of containment outside system pipeline
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a device and a method for monitoring coolant leakage of a containment outside system pipeline.
Background
Leakage monitoring of containment outside system pipeline coolant is always a problem that nuclear power plants and nuclear power devices need to pay close attention, and radioactive substances can be effectively monitored and prevented from being released to the outside by monitoring leakage of the coolant, so that safe operation of nuclear power is ensured.
The related art discloses some methods of monitoring for coolant leakage from the containment outside system piping, such as:
when the loop is in the hot state operation process, after the pipeline leaks, the coolant enables the local environment of the factory building to generate high temperature and high pressure, so that the place where the pipeline leaks can be roughly judged. However, this method is only suitable for the case where the reactor is in a hot operation state and the coolant is in a high temperature and high pressure state. When the first loop is in a cold state operation process, the coolant leakage does not cause the change of the environmental temperature and pressure of the factory building, the coolant leakage is difficult to be obtained by analysis only through abnormal parameters of a process system, whether the coolant leakage occurs in or out of the containment, and the leakage place is confirmed by personnel inspection. If a coolant leak occurs outside the containment, it is not possible to quickly identify the leak location at the first time and achieve a quick response that prevents the diffusion of the radioactive material.
The radioactive detection device is arranged in the factory building, when the pipeline coolant leaks in the factory building, the radioactive detection device detects that the space radioactive concentration is abnormal, and the coolant leakage occurs by sending an alarm prompt, so that the leakage place can be judged. However, the above monitoring method is only suitable for the environment without radioactive medium, and if the environment where the detected pipeline is located has radioactivity, the detection and identification cannot be effectively performed.
A plurality of pits are arranged between pipe galleries of a nuclear power plant and used for collecting coolant leaking from pipelines in rooms, and when the liquid level value of the pits is abnormal, the occurrence of pipeline leakage between the pipe galleries is indicated, so that the general leakage position can be determined. However, the above monitoring method has a slow response time, is only suitable for the occasion of independent pipeline compartment, and cannot quickly identify which pipeline of a specific system is leaked when a plurality of system pipelines exist between the pipeline compartments, so that misjudgment is easy to occur.
Disclosure of Invention
The invention aims at: at least one defect in the prior art is overcome, and a device and a method for monitoring the leakage of the coolant in the pipeline of the containment outside system are provided.
In order to achieve the above object, the present invention provides a monitoring device for a containment outside system pipe coolant leakage, comprising:
the process system is positioned outside the containment and connected with the coolant loop positioned in the containment through a pipeline;
a first flow measuring unit, which is positioned on a pipeline of the coolant loop flowing out of the containment, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing out of the containment;
a second flow measuring unit, which is positioned on a pipe flowing into the coolant primary circuit, for measuring a real-time flow and an accumulated flow of the coolant flowing into the containment vessel; and
the computing unit is used for performing deviation computation on real-time measurement results of the first flow measurement unit and the second flow measurement unit and performing deviation computation on accumulated measurement results of the first flow measurement unit and the second flow measurement unit; and
and the judging unit is used for judging that the refrigerant leakage occurs in the system pipeline outside the containment when the deviation operation results of the real-time measurement result and the accumulated measurement result are both larger than a set value.
According to one embodiment of the monitoring device for leakage of the containment outside system pipeline coolant, the operation unit comprises a first subtracter, the judging unit comprises a first threshold value device, the first subtracter is used for performing deviation operation on real-time measurement results of the first flow measurement unit and the second flow measurement unit, and the first threshold value device is used for judging whether the deviation operation result of the real-time measurement results is larger than a set value.
According to an embodiment of the monitoring device for a leakage of a containment outside system pipe coolant of the present invention, the operation unit includes a second subtracter, the judgment unit includes a second thresholder for performing a deviation operation on the accumulated measurement results of the first flow measurement unit and the second flow measurement unit, and the second thresholder is for judging whether the deviation operation result of the accumulated measurement results is larger than a set value.
According to an embodiment of the monitoring device for leakage of coolant from an outside-containment system pipe of the present invention, the monitoring device further includes an alarm unit that gives an alarm when the judging unit judges that the leakage of coolant from the outside-containment system pipe occurs.
In order to achieve the above object, the present invention further provides a method for monitoring coolant leakage in a system-outside-a-containment pipe, comprising:
connecting a process system located outside the containment vessel to a coolant loop located within the containment vessel via piping;
a first flow measuring unit is arranged on a pipeline of the coolant loop, which flows out of the containment, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing out of the containment;
providing a second flow measurement unit on a pipe located in the coolant-circuit for measuring the real-time flow and the cumulative flow of coolant flowing into the containment vessel; and
performing deviation calculation on real-time measurement results of the first flow measurement unit and the second flow measurement unit through a calculation unit, and performing deviation calculation on accumulated measurement results of the first flow measurement unit and the second flow measurement unit; and
and when the deviation calculation results of the real-time measurement result and the accumulated measurement result are both larger than a set value, judging that the coolant leakage occurs in the system pipeline outside the containment through a judging unit.
According to one embodiment of the method for monitoring the leakage of the coolant in the system pipeline outside the containment, the operation unit comprises a first subtracter, the judging unit comprises a first threshold value device, the first subtracter is used for performing deviation operation on real-time measurement results of the first flow measurement unit and the second flow measurement unit, and the first threshold value device is used for judging whether the deviation operation result of the real-time measurement results is larger than a set value.
According to an embodiment of the method for monitoring leakage of a containment outside system pipe coolant of the present invention, the operation unit includes a second subtracter, the judgment unit includes a second thresholder for performing a deviation operation on the accumulated measurement results of the first flow measurement unit and the second flow measurement unit, and the second thresholder is used for judging whether the deviation operation result of the accumulated measurement results is larger than a set value.
According to one embodiment of the method for monitoring the leakage of the coolant in the system pipeline outside the containment, when the judging unit judges that the leakage of the coolant occurs in the system pipeline outside the containment, an alarm is sent out through the alarm unit.
Compared with the prior art, the monitoring device and the monitoring method for the leakage of the coolant in the system pipeline outside the containment are characterized in that the first flow measuring unit is arranged on the pipeline of the coolant loop flowing out of the containment, the second flow measuring unit is arranged on the pipeline flowing into the coolant loop, the calculation unit is used for carrying out deviation calculation on real-time measurement results of the first flow measuring unit and the second flow measuring unit, the calculation unit is used for carrying out deviation calculation on accumulated measurement results of the first flow measuring unit and the second flow measuring unit, and the judgment unit is used for judging that the coolant leakage occurs in the system pipeline outside the containment when the deviation calculation results of the real-time measurement results and the accumulated measurement results are larger than the set value, and giving an alarm. Therefore, the monitoring of the leakage of the coolant in the system pipeline outside the containment is simple and easy to implement.
Drawings
The following describes the device and method for monitoring the leakage of the coolant in the system pipeline outside the containment and the technical effects thereof in detail with reference to the accompanying drawings and the detailed description, wherein:
FIG. 1 is a schematic diagram of a monitoring device for coolant leakage from a containment outside system pipeline according to the present invention.
FIG. 2 is a schematic diagram of one embodiment of a method of monitoring for a containment outside system pipe coolant leak.
In the figure:
10- -coolant loop; 20- -a process system; 30- -a first flow measurement unit; 40- -a second flow measurement unit; 50- -a first subtractor; 60—a first thresholder; 70- -a second subtractor; 80—a second thresholder; 90-alarm unit.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is presented herein for purposes of illustration only and is not intended to limit the invention.
Referring to fig. 1 and 2, the present invention provides a device for monitoring coolant leakage in a system pipe outside a containment, comprising:
a process system 20 located outside the containment vessel and connected to the coolant loop 10 located inside the containment vessel by piping;
a first flow measuring unit 30, which is located on a pipe of the coolant-loop 10 that flows out of the containment, for measuring a real-time flow rate and a cumulative flow rate of the coolant that flows out of the containment;
a second flow measuring unit 40, which is located on a pipe flowing into the coolant-loop 10, for measuring a real-time flow rate and a cumulative flow rate of the coolant flowing into the containment vessel;
an operation unit for performing a deviation operation on the real-time measurement results of the first flow measurement unit 30 and the second flow measurement unit 40, and performing a deviation operation on the accumulated measurement results of the first flow measurement unit 30 and the second flow measurement unit 40; and
and the judging unit is used for judging that the coolant leaks in the system pipeline outside the containment when the deviation calculation results of the real-time measurement result and the accumulated measurement result are both larger than the set value.
According to an embodiment of the monitoring device for leakage of the coolant in the system pipe outside the containment vessel according to the present invention, the operation unit includes a first subtracter 50, the judgment unit includes a first thresholder 60, the first subtracter 50 is used for performing deviation operation on the real-time measurement results of the first flow measurement unit 30 and the second flow measurement unit 40, and the first thresholder 60 is used for judging whether the deviation operation result of the real-time measurement results is larger than a set value.
According to an embodiment of the monitoring device for a leakage of a containment outside system pipe coolant of the present invention, the operation unit includes a second subtracter 70, the judgment unit includes a second thresholder 80, the second subtracter 70 is configured to perform a deviation operation on the accumulated measurement results of the first flow measurement unit 30 and the second flow measurement unit 40, and the second thresholder 80 is configured to judge whether the deviation operation result of the accumulated measurement results is greater than a set value.
According to one embodiment of the monitoring device for leakage of coolant from the containment outside system pipe of the present invention, the monitoring device for leakage of coolant from the containment outside system pipe of the present invention further comprises an alarm unit 90 for giving an alarm when the judging unit judges that leakage of coolant from the containment outside system pipe occurs
By adopting the monitoring device for the leakage of the containment outside system pipeline coolant, whether the containment outside system pipeline coolant leaks or not can be detected by the following modes:
referring to fig. 2, first, the related devices and pipes are connected according to fig. 1, so that the coolant-loop system forms a coolant circulation, and the circulation reaches an equilibrium state; then, during a period of time, the real-time flow rate of the coolant flowing out of the containment vessel and the real-time flow rate of the coolant flowing into the containment vessel are measured by the first flow measurement unit 30 and the second flow measurement unit 40, respectively, and the deviation calculation of the real-time flow rates of the two flow measurement units is performed by the first subtractor 50 of the arithmetic unit, the first subtractor 50 can realize: the real-time flow of the first flow measurement unit 30 minus the real-time flow of the second flow measurement unit 40, i.e. the amount of coolant flowing out of the containment minus the amount of coolant flowing into the containment; when the deviation of the real-time flow rate of the first flow rate measuring unit 30 minus the real-time flow rate of the second flow rate measuring unit 40 is greater than the set value of the first thresholder 60 of the operator, it means that the amount of coolant flowing out of the containment is greater than the amount of coolant flowing into the containment for a while.
Further, the first flow measurement unit 30 and the second flow measurement unit 40 monitor the cumulative flow values of the coolant flowing out of the containment vessel and into the containment vessel, and perform a deviation operation on the two cumulative flow values by the second subtractor 70 of the operator, the second subtractor 70 may realize: the accumulated flow value of the first flow measurement unit 30 minus the accumulated flow value of the second flow measurement unit 40; when the deviation of the accumulated flow value measured by the first flow measurement unit 30 minus the accumulated flow value measured by the second flow measurement unit 40 is greater than the set value of the second thresholder 80 of the operator, it means that the coolant flow out of the containment is instantaneously greater than the coolant flow into the containment and exceeds the threshold range.
When both the real-time measurement result and the accumulated measurement result of the first flow measurement unit 30 and the second flow measurement unit 40 are larger than the set value, it is determined that the outside-containment system pipe is leaking coolant. At this time, the alarm unit 90 gives an alarm.
In the monitoring device and the monitoring method for the leakage of the coolant in the system pipe outside the containment vessel according to the present invention, the process system 20 is not particularly limited, and may be any device or system for connecting the coolant circuit 10 via the penetration and the pipe.
Compared with the prior art, the monitoring device and the monitoring method for the leakage of the coolant in the system pipeline outside the containment have the following advantages:
first, by providing the first flow rate measuring unit 30 on the pipe through which the coolant circuit 10 flows out of the containment vessel, providing the second flow rate measuring unit 40 on the pipe through which the coolant circuit 10 flows in, performing a deviation calculation on the real-time measurement results of the first flow rate measuring unit 30 and the second flow rate measuring unit 40 by the calculating unit, performing a deviation calculation on the cumulative measurement results of the first flow rate measuring unit 30 and the second flow rate measuring unit 40, and when the deviation calculation results of the real-time measurement results and the cumulative measurement results are both larger than a set value, the judging unit judges that the coolant leakage occurs in the system pipe outside the containment vessel, and the alarm unit alarms at this time. Therefore, the monitoring of the leakage of the coolant in the system pipeline outside the containment is simple and easy to implement.
Secondly, no matter in a loop hot state or a cold state operation, no personnel are needed for on-site investigation in a radioactive occasion or a non-radioactive occasion, the judgment of the leakage of the coolant in the system pipeline outside the containment can be finished from the process parameters, the specific pipeline with the leakage can be rapidly and effectively judged, the response time is fast, and the leakage of radioactive substances is remarkably reduced.
The present invention is also capable of suitable alterations and modifications in the above-described embodiments, in light of the above principles. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.

Claims (8)

1. A containment outside system pipe coolant leak monitoring device, the containment having a coolant loop therein, comprising:
the process system is positioned outside the containment and connected to the coolant loop through a pipeline;
a first flow measuring unit, which is positioned on a pipeline of the coolant loop flowing out of the containment, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing out of the containment;
a second flow measuring unit, which is positioned on a pipe flowing into the coolant primary circuit, for measuring a real-time flow and an accumulated flow of the coolant flowing into the containment vessel;
the computing unit is used for performing deviation computation on real-time measurement results of the first flow measurement unit and the second flow measurement unit and performing deviation computation on accumulated measurement results of the first flow measurement unit and the second flow measurement unit; and
and the judging unit is used for judging that the refrigerant leakage occurs in the system pipeline outside the containment when the deviation operation results of the real-time measurement result and the accumulated measurement result are both larger than a set value.
2. The apparatus according to claim 1, wherein the arithmetic unit includes a first subtracter for performing a deviation operation on real-time measurement results of the first flow measurement unit and the second flow measurement unit, and the judgment unit includes a first thresholder for judging whether the deviation operation result of the real-time measurement results is larger than a set value.
3. The monitoring device for the leakage of the coolant in the system pipe outside the containment vessel according to claim 1, wherein the operation unit includes a second subtracter for performing a deviation operation on the accumulated measurement results of the first flow measurement unit and the second flow measurement unit, and the judgment unit includes a second thresholder for judging whether the deviation operation result of the accumulated measurement results is larger than a set value.
4. The monitoring device for the leakage of the coolant from the outside-containment system pipe according to claim 1, further comprising an alarm unit that gives an alarm when the judging unit judges that the leakage of the coolant from the outside-containment system pipe occurs.
5. A method of monitoring for a containment outside system pipe coolant leak, comprising:
connecting a process system located outside the containment vessel to a coolant loop located within the containment vessel via piping;
a first flow measuring unit is arranged on a pipeline of the coolant loop, which flows out of the containment, and is used for measuring the real-time flow and the accumulated flow of the coolant flowing out of the containment;
providing a second flow measurement unit on a pipe located in the coolant-circuit for measuring the real-time flow and the cumulative flow of coolant flowing into the containment vessel; and
performing deviation calculation on real-time measurement results of the first flow measurement unit and the second flow measurement unit through a calculation unit, and performing deviation calculation on accumulated measurement results of the first flow measurement unit and the second flow measurement unit; and
and when the deviation calculation results of the real-time measurement result and the accumulated measurement result are both larger than a set value, judging that the coolant leakage occurs in the system pipeline outside the containment through a judging unit.
6. The method according to claim 5, wherein the arithmetic unit includes a first subtracter for performing a deviation operation on real-time measurement results of the first flow measurement unit and the second flow measurement unit, and the judgment unit includes a first thresholder for judging whether the deviation operation result of the real-time measurement results is larger than a set value.
7. The method according to claim 5, wherein the arithmetic unit includes a second subtracter for performing a deviation operation on the cumulative measurement results of the first flow measurement unit and the second flow measurement unit, and the judgment unit includes a second thresholder for judging whether the deviation operation result of the cumulative measurement results is larger than a set value.
8. The method for monitoring the leakage of the coolant in the system pipe outside the containment according to claim 5, wherein the alarm is given by the alarm unit when the judging unit judges that the leakage of the coolant in the system pipe outside the containment occurs.
CN202111305352.4A 2021-11-05 2021-11-05 Device and method for monitoring coolant leakage of containment outside system pipeline Pending CN116092707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111305352.4A CN116092707A (en) 2021-11-05 2021-11-05 Device and method for monitoring coolant leakage of containment outside system pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111305352.4A CN116092707A (en) 2021-11-05 2021-11-05 Device and method for monitoring coolant leakage of containment outside system pipeline

Publications (1)

Publication Number Publication Date
CN116092707A true CN116092707A (en) 2023-05-09

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Application Number Title Priority Date Filing Date
CN202111305352.4A Pending CN116092707A (en) 2021-11-05 2021-11-05 Device and method for monitoring coolant leakage of containment outside system pipeline

Country Status (1)

Country Link
CN (1) CN116092707A (en)

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