CN111916233A - Small pressurized water reactor safety injection system combining passive and active functions - Google Patents
Small pressurized water reactor safety injection system combining passive and active functions Download PDFInfo
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- CN111916233A CN111916233A CN202010812012.XA CN202010812012A CN111916233A CN 111916233 A CN111916233 A CN 111916233A CN 202010812012 A CN202010812012 A CN 202010812012A CN 111916233 A CN111916233 A CN 111916233A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
- G21C15/182—Emergency cooling arrangements; Removing shut-down heat comprising powered means, e.g. pumps
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- 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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Abstract
The invention discloses a small pressurized water reactor passive and active combined safety injection system and a use method thereof, wherein the small pressurized water reactor passive and active combined safety injection system comprises a passive safety injection system and an active safety injection system which are arranged in a containment; the passive safety injection system injects water in the passive safety injection water tank into the reactor pressure vessel by utilizing the height difference and the density difference and is used for providing high-pressure injection; active safety injection systems employ safety injection pumps to take water from a pit reservoir into a reactor pressure vessel for providing low pressure injection. The invention can realize the comprehensive coverage of different pressure range requirements such as high pressure, medium pressure, low pressure and the like, realize the diversity and reliability of the safety injection function, realize the simplified arrangement of the system structure and improve the safety and the economy of the small pressurized water reactor nuclear power plant.
Description
Technical Field
The invention relates to the technical field of safety design of nuclear power plants, in particular to a small pressurized water reactor safety injection system combining passive and active functions and a using method thereof.
Background
When a pressurized water reactor is subjected to a reactor coolant pipeline break accident (LOCA), the reactor coolant is lost from the pressure vessel, and if no countermeasure is adopted, the reactor core fuel elements can be burnt out due to the loss of the coolant, so that the safety performance of the reactor is further threatened. Therefore, a set of safety injection system is needed to be arranged for the LOCA accident so as to solve the problem of coolant loss in the LOCA accident process, maintain the coolant loading of the reactor, guarantee the coolability of the reactor core fuel elements and guarantee the safety of the reactor.
Disclosure of Invention
In order to solve the problem of coolant loss in the LOCA accident process and guarantee the safety of a reactor, the invention provides a small-sized pressurized water reactor safety injection system combining passive and active functions.
The invention is realized by the following technical scheme:
a small pressurized water reactor passive and active combined safety injection system comprises a passive safety injection system and an active safety injection system which are arranged in a containment;
the passive safety injection system injects water in the passive safety injection water tank into the reactor pressure vessel by utilizing the height difference and the density difference;
the active safety injection system adopts a safety injection pump to take water from a pile pit reservoir and inject the water into a reactor pressure vessel.
The invention provides a passive and active combined safety injection system, wherein the passive safety injection system realizes high-pressure injection, and the active safety injection system is used for realizing low-pressure injection. According to actual needs, system parameters are set, so that the safe injection system can realize comprehensive coverage of different pressure range requirements such as high pressure, medium pressure and low pressure, diversity and reliability of safe injection functions are realized, and the safety and economy of a small pressurized water reactor nuclear power plant are improved.
Preferably, the passive safety injection system of the invention utilizes the principle of height difference and density difference to realize passive safety injection. The passive safety injection system comprises a passive safety injection water tank;
the top of the passive safe injection water tank is directly connected with the pressure container through a balance pipeline;
the bottom of the passive safe injection water tank is directly connected with the pressure container through a passive injection pipeline;
and the interface position of the balance pipeline and the pressure vessel is higher than that of the passive injection pipeline and the pressure vessel.
Preferably, the active safety injection system of the invention realizes active safety injection by using a pump driving mode. The active safety injection system comprises a low-pressure safety injection pump and a pit-piling water reservoir;
the low-pressure safe injection pump is used for providing power drive for low-pressure safe injection, a pump suction inlet is arranged at the bottom of the pile pit reservoir, and a pump outlet is connected with a reactor pressure vessel through a dynamic injection pipeline;
the stack pit reservoir provides a water source for low-pressure safe injection and is arranged at the bottom of the stack pit.
Preferably, the invention is also provided with redundant isolation valves on the balance pipeline and the injection pipeline. The invention also comprises a balance pipeline isolation valve, a passive injection pipeline isolation valve and an active injection pipeline isolation valve;
the balance pipeline isolation valve is arranged on the balance pipeline;
the passive injection pipeline isolation valve is arranged on the passive injection pipeline;
the active injection line isolation valve is arranged on the active injection line.
Preferably, the balance pipeline isolation valve is a normally open electric valve during normal operation and is used for isolating the passive safety injection water tank and the reactor coolant system during the startup and shutdown processes;
the passive injection pipeline isolation valve and the active injection pipeline isolation valve are normally-closed electric gate valves during normal operation, so that the safe injection system is not put into operation during normal operation of the reactor and is started after the safe injection signal is triggered.
Preferably, the heap pit water reservoir of the present invention can also be used for coolant recovery after a loss of coolant accident.
Preferably, the present invention further comprises a heat exchanger;
the heat exchanger is arranged in the pit reservoir, continuously guides the energy in the pit out of the containment, maintains the temperature of the safely injected fluid in the low-pressure recirculation stage, and ensures the continuous cooling of the reactor core.
Preferably, the present invention further comprises a potentiostat safety valve;
the safety valve of the voltage stabilizer is used for releasing pressure of a reactor coolant system, is matched with low-pressure safety injection for use, realizes long-term recirculation charging and discharging of a reactor core, and maintains continuous cooling of the reactor core.
In another aspect, the present invention further provides a method for using the safety injection system, the method comprising the following steps:
A. when the pressure of the voltage stabilizer is monitored to be reduced to a first low-pressure setting value of the voltage stabilizer or the water level of the voltage stabilizer is monitored to be reduced to a first low-pressure setting value of the water level of the voltage stabilizer, the passive safety injection is started, the isolation valve of the passive safety injection pipeline is opened, and the passive high-pressure safety injection is realized based on the height difference and the density difference;
B. the water in the passive safety injection water tank is continuously injected into the reactor core, the water level of the passive safety injection water tank is reduced, and when the water level in the passive safety injection water tank reaches the low setting value of the water level of the passive safety injection water tank, a safety valve opening signal of a voltage stabilizer is triggered to release the pressure of a reactor coolant system;
C. when the pressure of the voltage stabilizer is monitored to be reduced to a second low-pressure setting value of the voltage stabilizer, active safety injection is started, an active safety injection pipeline isolating valve is opened, a low-pressure safety injection pump is started, a heat exchanger of the reactor pit reservoir is started, long-term low-pressure safety injection recirculation is realized, reactor core submergence is guaranteed, continuous derivation of reactor core waste heat is maintained, and the safety of a reactor is guaranteed.
The invention has the following advantages and beneficial effects:
1. the safety injection system combining the passive and active modes can realize comprehensive coverage of requirements of different pressure ranges such as high pressure, medium pressure and low pressure, diversity and reliability of safety injection functions, simplifies the structure of the system and improves the safety and the economy of a nuclear power plant.
2. The design of combining passive and active can give full play to the characteristics of high density difference and high driving head of the passive safe injection system under the high temperature and high pressure of the coolant system, and the requirement on a high-pressure safe injection pump is eliminated; the stable and controllable characteristics of the active safety injection system under the low-pressure working condition are fully exerted, and the problem that the driving force of the passive system is insufficient at low temperature and low pressure is avoided. The safety injection system combining the passive and the active can comprehensively cope with large, medium and small breakages of a reactor coolant system and cover various possible working conditions of high, medium and low pressure.
3. The passive high-pressure safe injection water tank and the medium-pressure safe injection water tank are designed integrally, so that the function division of the water tank is realized, and the parallel injection of pipelines is considered, so that the manufacturing cost of the pipelines and the water tank of the system is simplified.
4. The invention has international advanced technical level, can be applied to the design of a safety injection system of a small pressurized water reactor nuclear power plant, and can improve the safety and the economy of the small pressurized water reactor nuclear power plant.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic view of the structure of the safety injection system of the present invention.
Reference numbers and corresponding part names in the drawings:
1-pressure vessel, 2-reactor core, 3-manostat, 4-manostat safety valve, 5-passive safety injection water tank, 6-balance pipeline isolation valve, 7-passive injection pipeline isolation valve, 8-active injection pipeline isolation valve, 9-low pressure safety injection pump, 10-pit reservoir, 11-heat exchanger and 12-containment vessel.
Detailed Description
Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The embodiment provides a small pressurized water reactor passive and active combined safety injection system, which comprises a passive safety injection system and an active safety injection system which are arranged in a safety shell 12.
The passive safety injection system of the embodiment utilizes the height difference and the density difference to inject water in the passive safety injection water tank into the reactor pressure vessel for providing high-pressure injection;
the active safety injection system of this embodiment employs a safety injection pump to take water from a pit reservoir and inject it into the reactor pressure vessel for providing low pressure injection.
The design principle of the safety injection system of the present embodiment is as follows:
after the LOCA accident of the small pressurized water reactor nuclear power plant occurs, the reactor coolant is sprayed outwards from the crevasses. The water level of the voltage stabilizer is reduced and the pressure of the voltage stabilizer is reduced due to the loss of the coolant filling amount of the reactor, the pressure reduction of the voltage stabilizer or the water level reduction of the voltage stabilizer judges that the reactor core needs water supplementing measures, and the passive high-pressure safety injection system is automatically triggered by the low pressure of the voltage stabilizer or the low water level signal of the voltage stabilizer to supplement water to the reactor core; the driving force of the passive high-pressure safety injection is derived from the height difference and the density difference between the high-pressure safety injection water tank and the reactor core.
When the LOCA accident cannot be stopped in time and the pressure of the reactor coolant system continuously drops, the active low-pressure safety injection system is automatically triggered by a pressure-stabilizer pressure low-2 signal to replenish water for the reactor core. If the water quantity of the high-pressure safe injection water tank is about to be used up, but the pressure of the reactor coolant system is not reduced to the low-pressure safe injection pressure, the high-pressure safe injection water tank water level low signal triggers the safety valve of the voltage stabilizer to open so as to relieve the pressure of the reactor coolant system, and when the pressure is reduced to the second low pressure of the voltage stabilizer, the low-pressure safe injection system can be started.
The active low-pressure safe injection driving force is used for supplementing water to the reactor core in a mode of depending on a safety injection pump, a low-pressure safe injection water source is positioned at the bottom of the reactor pit and has a water source collecting function after a heat exchanger and a LOCA accident, the low-pressure safe injection system can be guaranteed to be injected at a lower temperature in a recycling mode, the water filling amount and the waste heat derivation of the reactor are maintained, and the safety of the reactor is guaranteed.
As shown in fig. 1, the passive safety injection system of the present embodiment includes a passive safety injection water tank 5.
The top of the passive safety injection water tank 5 of the present embodiment is directly connected to the pressure vessel 1 through a balance line.
The bottom of the passive safety injection water tank 5 of the present embodiment is directly connected to the pressure vessel 1 through a passive injection line.
And the interface position of the balance pipeline and the pressure vessel 1 is higher than the interface position of the passive injection pipeline and the pressure vessel 1.
The active safety injection system of the embodiment comprises a low-pressure safety injection pump 9 and a pit water storage tank 10;
the low-pressure safe injection pump 9 of the embodiment is used for providing power drive of low-pressure safe injection, a pump suction inlet is arranged at the bottom of the stack pit reservoir 10, and a pump outlet is connected with the reactor pressure vessel 1 through a movable injection pipeline.
The pit water reservoir 10 of the present embodiment provides a water source for low pressure safe injection, and is disposed at the bottom of the pit for coolant recovery after a loss of coolant accident.
The present embodiment provides a balance line isolation valve 6 on the balance line.
The balance pipeline isolation valve 6 of the embodiment is a normally open electric valve during normal operation, and is mainly used for isolating a high-pressure safety injection water tank from a reactor coolant system during the starting and stopping processes.
In this embodiment, a passive injection line isolation valve 7 is provided in the passive injection line.
In this embodiment, an active injection line isolation valve 8 is provided in the active injection line.
The passive injection pipeline isolation valve 7 and the active injection pipeline isolation valve 8 of the embodiment are normally-closed electric gate valves, so that the safe injection system is not put into operation when the reactor normally operates, and after the safe injection signal is triggered, the isolation valves are started to start the safe injection system.
In the embodiment, the pressure and the water level of the voltage stabilizer are measured by the reactor protection system, and the measured data is processed by the control logic to form a starting signal of the safe injection system, namely, when the pressure or the water level signal of the voltage stabilizer reaches the triggering condition of the safe injection system, equipment such as a pump and an isolation valve of the corresponding safe injection system is started to realize safe injection.
The combined passive and active safety injection system of this embodiment further comprises a heat exchanger 11, a potentiostat safety valve 4 and a power plant (power supply).
The heat exchanger 11 of the present embodiment is installed in the cooling pit reservoir 10, continuously guides the energy in the pit out of the containment 12, maintains the temperature of the safely injected fluid in the low-pressure recirculation stage, and ensures continuous cooling of the core.
The pressure stabilizer safety valve 4 of the embodiment is used for pressure relief of a reactor coolant system, and can be used in cooperation with low-pressure safety injection to realize long-term recirculation charging and discharging of a reactor core and maintain continuous cooling of the reactor core.
The power equipment of the embodiment is used for providing a reliable power supply for the low-voltage safe injection pump and guaranteeing power supply.
The safety injection system combining the passive injection and the active injection is automatically operated, and the related system and equipment do not need an operator to perform any operation in the triggering and action processes, so that the influence of human factors is avoided. Taking a non-isolatable reactor coolant system break as an example, the specific operation flow is as follows:
A. after the reactor coolant system is broken, the pressure and the water level of the pressure stabilizer are reduced;
B. when the pressure of the voltage stabilizer is monitored to be reduced to a first low-pressure setting value of the voltage stabilizer or the water level of the voltage stabilizer is monitored to be reduced to a low setting value of the water level of the first voltage stabilizer, the passive safety injection is started, the isolating valve of the passive safety injection pipeline is opened, and the passive safety injection is realized based on the height difference and the density difference;
C. the water in the passive safety injection water tank is continuously injected into the reactor core, the water level of the passive safety injection water tank is reduced, and when the water level in the passive safety injection water tank reaches the low setting value of the water level of the passive safety injection water tank, a safety valve opening signal of a voltage stabilizer is triggered to release the pressure of a reactor coolant system;
D. when the pressure of the voltage stabilizer is monitored to be reduced to a second low-pressure setting value of the voltage stabilizer, active low-pressure safety injection is started, an active safety injection pipeline isolating valve is opened, a low-pressure safety injection pump is started, a heat exchanger of the reactor pit reservoir is started, long-term low-pressure safety injection recirculation is realized, reactor core submergence is guaranteed, continuous derivation of reactor core waste heat is maintained, and the safety of a reactor is guaranteed.
The passive and active combined safety injection system provided by the embodiment is particularly suitable for small pressurized water reactor nuclear power plants. The system design fully considers the response timeliness and the reliability of passive operation, considers the characteristic of stable and controllable active system, combines the characteristic of the small reactor coolant system breach accident, proposes the design of adopting the passive safe injection system at high pressure and adopting the active safe injection system at low pressure, comprehensively deals with various breaches of the small pressurized water reactor coolant system, and covers various possible working conditions of high pressure, medium pressure and low pressure. The safety injection system combining the passive and active modes not only improves the reliability of system operation, but also simplifies the system setting, improves the safety performance of the nuclear power plant and further optimizes the construction cost of the nuclear power plant.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A small pressurized water reactor passive and active combined safety injection system is characterized by comprising a passive safety injection system and an active safety injection system which are arranged in a containment;
the passive safety injection system injects water in the passive safety injection water tank into the reactor pressure vessel by utilizing the height difference and the density difference;
the active safety injection system adopts a safety injection pump to take water from a pile pit reservoir and inject the water into a reactor pressure vessel.
2. The safety injection system of claim 1, wherein the passive safety injection system comprises a passive safety injection water tank;
the top of the passive safe injection water tank is directly connected with the pressure container through a balance pipeline;
the bottom of the passive safe injection water tank is directly connected with the pressure container through a passive injection pipeline;
and the interface position of the balance pipeline and the pressure vessel is higher than that of the passive injection pipeline and the pressure vessel.
3. The safety injection system of claim 1, wherein the active safety injection system comprises a low pressure safety injection pump and a heap pit water reservoir;
the low-pressure safe injection pump is used for providing power drive for low-pressure safe injection, a pump suction inlet is arranged at the bottom of the pile pit reservoir, and a pump outlet is connected with a reactor pressure vessel through a dynamic injection pipeline;
the stack pit reservoir provides a water source for low-pressure safe injection and is arranged at the bottom of the stack pit.
4. The safety injection system of claim 1, further comprising a balance line isolation valve, a passive fill line isolation valve, and an active fill line isolation valve;
the balance pipeline isolation valve is arranged on the balance pipeline;
the passive injection pipeline isolation valve is arranged on the passive injection pipeline;
the active injection line isolation valve is arranged on the active injection line.
5. The safety injection system of claim 1, wherein the balance line isolation valve is a normally open electric valve during normal operation, and is used for isolating the passive safety injection water tank from the reactor coolant system during the startup and shutdown process;
the passive injection pipeline isolation valve and the active injection pipeline isolation valve are normally-closed electric gate valves during normal operation, so that the safe injection system is not put into operation during normal operation of the reactor and is started after the safe injection signal is triggered.
6. The safety injection system of any of claims 1-5, wherein the stack pit reservoir is further operable for coolant recovery following a loss of coolant accident.
7. The safety injection system of any one of claims 1-5, further comprising a heat exchanger;
the heat exchanger is arranged in the pit reservoir, continuously guides the energy in the pit out of the containment, maintains the temperature of the safely injected fluid in the low-pressure recirculation stage, and ensures the continuous cooling of the reactor core.
8. The safety injection system of any of claims 1-5, further comprising a potentiostat safety valve;
the safety valve of the voltage stabilizer is used for releasing pressure of a reactor coolant system, is matched with low-pressure safety injection for use, realizes long-term recirculation charging and discharging of a reactor core, and maintains continuous cooling of the reactor core.
9. Use of a safety injection system according to any of claims 1 to 8, characterized in that it comprises the following steps:
A. when the pressure of the voltage stabilizer is monitored to be reduced to a first low-pressure setting value of the voltage stabilizer or the water level of the voltage stabilizer is monitored to be reduced to a first low-pressure setting value of the water level of the voltage stabilizer, the passive safety injection is started, the isolation valve of the passive safety injection pipeline is opened, and the passive high-pressure safety injection is realized based on the height difference and the density difference;
B. the water in the passive safety injection water tank is continuously injected into the reactor core, the water level of the passive safety injection water tank is reduced, and when the water level in the passive safety injection water tank reaches the low setting value of the water level of the passive safety injection water tank, a safety valve opening signal of a voltage stabilizer is triggered to release the pressure of a reactor coolant system;
C. when the pressure of the voltage stabilizer is monitored to be reduced to a second low-pressure setting value of the voltage stabilizer, active safety injection is started, an active safety injection pipeline isolating valve is opened, a low-pressure safety injection pump is started, a heat exchanger of the reactor pit reservoir is started, long-term low-pressure safety injection recirculation is realized, reactor core submergence is guaranteed, continuous derivation of reactor core waste heat is maintained, and the safety of a reactor is guaranteed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068048A (en) * | 2021-11-18 | 2022-02-18 | 中国核动力研究设计院 | Low-pressure safety injection system, method and medium for reactor core pressure vessel of nuclear reactor |
| WO2022252359A1 (en) * | 2021-05-31 | 2022-12-08 | 上海核工程研究设计院有限公司 | Novel automatic depressurizing system and method for nuclear power plant |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180543A (en) * | 1989-06-26 | 1993-01-19 | Westinghouse Electric Corp. | Passive safety injection system using borated water |
| CN102169733A (en) * | 2011-02-14 | 2011-08-31 | 中国核电工程有限公司 | Passive and active combined special safety system for nuclear power plant |
| CN103545001A (en) * | 2012-07-12 | 2014-01-29 | 韩国原子力硏究院 | Passive safety injection system using safety injection tank |
| US20140226778A1 (en) * | 2013-02-14 | 2014-08-14 | Korea Atomic Energy Research Institute | Multi stage safety injection device and passive safety injection system having the same |
| WO2015010399A1 (en) * | 2013-07-26 | 2015-01-29 | 中广核工程有限公司 | Reactor cavity water injection system and method for nuclear power plant |
| CN105427903A (en) * | 2015-12-11 | 2016-03-23 | 哈尔滨工程大学 | Recycling safety injection system adopting gas-liquid booster pump and applied to nuclear power plant |
| CN210956180U (en) * | 2019-10-31 | 2020-07-07 | 华龙国际核电技术有限公司 | Nuclear power safety injection system and nuclear power system |
-
2020
- 2020-08-13 CN CN202010812012.XA patent/CN111916233A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180543A (en) * | 1989-06-26 | 1993-01-19 | Westinghouse Electric Corp. | Passive safety injection system using borated water |
| CN102169733A (en) * | 2011-02-14 | 2011-08-31 | 中国核电工程有限公司 | Passive and active combined special safety system for nuclear power plant |
| CN103545001A (en) * | 2012-07-12 | 2014-01-29 | 韩国原子力硏究院 | Passive safety injection system using safety injection tank |
| US20140226778A1 (en) * | 2013-02-14 | 2014-08-14 | Korea Atomic Energy Research Institute | Multi stage safety injection device and passive safety injection system having the same |
| WO2015010399A1 (en) * | 2013-07-26 | 2015-01-29 | 中广核工程有限公司 | Reactor cavity water injection system and method for nuclear power plant |
| CN105427903A (en) * | 2015-12-11 | 2016-03-23 | 哈尔滨工程大学 | Recycling safety injection system adopting gas-liquid booster pump and applied to nuclear power plant |
| CN210956180U (en) * | 2019-10-31 | 2020-07-07 | 华龙国际核电技术有限公司 | Nuclear power safety injection system and nuclear power system |
Non-Patent Citations (1)
| Title |
|---|
| 苏光辉 等: "《轻水堆核电厂严重事故现象学》", 31 October 2016, 国防工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022252359A1 (en) * | 2021-05-31 | 2022-12-08 | 上海核工程研究设计院有限公司 | Novel automatic depressurizing system and method for nuclear power plant |
| CN114068048A (en) * | 2021-11-18 | 2022-02-18 | 中国核动力研究设计院 | Low-pressure safety injection system, method and medium for reactor core pressure vessel of nuclear reactor |
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