CN217333647U - Primary loop system of pressurized water reactor nuclear power station and zinc adding device thereof - Google Patents
Primary loop system of pressurized water reactor nuclear power station and zinc adding device thereof Download PDFInfo
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- CN217333647U CN217333647U CN202122268170.6U CN202122268170U CN217333647U CN 217333647 U CN217333647 U CN 217333647U CN 202122268170 U CN202122268170 U CN 202122268170U CN 217333647 U CN217333647 U CN 217333647U
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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
Abstract
The application relates to a primary circuit system of a pressurized water reactor nuclear power station and a zinc adding device thereof, which comprise a pump body, a shut-off valve, a zinc concentration measuring device and a control device. The pump body is connected with a zinc solution storage device and a shut-off valve, and the shut-off valve and the zinc concentration measuring device are connected with a primary loop main loop. The control device is connected with the pump body, the shutoff valve and the zinc concentration measuring device and used for obtaining the zinc concentration in the coolant of the primary circuit main loop detected by the zinc concentration measuring device and adjusting the working states of the pump body and the shutoff valve according to the zinc concentration. This pressurized water reactor nuclear power station return circuit system adds zinc device sets up the shutoff valve between the pump body and a return circuit major loop, can be when breaking down, and control shutoff valve closes, keeps apart zinc device and a return circuit major loop, avoids a return circuit major loop zinc concentration to last rising, is favorable to improving the use reliability who adds zinc device.
Description
Technical Field
The application relates to the technical field of pressurized water reactor nuclear power stations, in particular to a primary loop system of a pressurized water reactor nuclear power station and a zinc adding device thereof.
Background
Pressurized water reactors are one of the main reactor types used in nuclear power plants and have many advantages such as high safety, high power density, and deep average burnup. In order to reduce the radiation dose of the primary loop of the nuclear power plant, the risk of stress corrosion cracking failure of structural materials and core power deviation, zinc can be added into the primary loop coolant of the pressurized water reactor to form a zincification water chemical environment.
Traditional pressurized water reactor nuclear power station primary circuit system adds zinc device when adding the zinc pump and breaking down, will continue to add zinc to the primary circuit coolant, can lead to zinc concentration in the primary circuit coolant to surpass the concentration upper limit, causes zinc deposit on the fuel rod, influences the normal heat transfer of fuel rod, and then influences the generating efficiency of nuclear power station. Therefore, the traditional zinc adding device for the primary circuit system of the pressurized water reactor nuclear power station has the problem of poor use reliability.
SUMMERY OF THE UTILITY MODEL
Therefore, the zinc adding device for the primary circuit system of the pressurized water reactor nuclear power station has high use reliability.
A kind of pressurized water reactor nuclear power station primary circuit system adds the zinc device, including:
the pump body is connected with the zinc solution storage device;
a shutoff valve connecting the pump body and a primary circuit main loop;
the zinc concentration measuring device is connected with the primary loop of the primary loop and is used for detecting the concentration of zinc in the coolant of the primary loop;
and the control device is connected with the pump body, the shutoff valve and the zinc concentration measuring device and used for adjusting the working states of the pump body and the shutoff valve according to the zinc concentration.
In one embodiment, the zinc adding device of the primary loop system of the pressurized water reactor nuclear power station further comprises a regulating valve, and the regulating valve is connected with the pump body, the shut-off valve and the control device.
In one embodiment, the regulating valve is an electric regulating valve.
In one embodiment, the zinc adding device of the primary loop system of the pressurized water reactor nuclear power station further comprises a check valve, and the check valve is connected with the shutoff valve and the primary loop.
In one embodiment, the control device is a PLC control device.
In one embodiment, the shutoff valve is an electrically operated shutoff valve.
In one embodiment, the pump body comprises a first zincating pump and a second zincating pump; the first zinc adding pump is connected with the zinc solution storage device and the regulating valve; the second zinc adding pump is connected with the zinc solution storage device and the regulating valve.
In one embodiment, the first zincating pump and the second zincating pump are the same type of zincating pump.
A primary circuit system of a pressurized water reactor nuclear power station comprises a zinc solution storage device, a primary circuit main circuit and the zinc adding device of the primary circuit system of the pressurized water reactor nuclear power station, wherein the zinc adding device of the primary circuit system of the pressurized water reactor nuclear power station is connected with the zinc solution storage device and the primary circuit main circuit.
In one embodiment, the primary loop system of the pressurized water reactor nuclear power station further comprises a letdown loop; the lower leakage loop is connected with the primary loop of the primary loop; and the connection point of the zinc adding device of the primary circuit system of the pressurized water reactor nuclear power station and the primary circuit main circuit is positioned at the downstream of the downward drainage circuit.
Above-mentioned pressurized water reactor nuclear power station a loop system adds zinc device sets up the shutoff valve between the pump body and a loop major loop, can be when breaking down, and control shutoff valve closes, keeps apart to add zinc device and a loop major loop, avoids a loop major loop zinc concentration to last rising, is favorable to improving the use reliability who adds zinc device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a zinc adding device of a primary circuit system of a pressurized water reactor nuclear power plant in one embodiment;
FIG. 2 is a schematic diagram of a pump start-stop signal in one embodiment;
FIG. 3 is a schematic structural diagram of a zinc adding device of a primary circuit system of a pressurized water reactor nuclear power plant in another embodiment;
FIG. 4 is a schematic diagram of a primary loop system of a pressurized water reactor nuclear power plant according to an embodiment;
FIG. 5 is a schematic diagram of a primary loop system of a pressurized water reactor nuclear power plant in another embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first zincating pump may be referred to as a second zincating pump, and similarly, a second zincating pump may be referred to as a first zincating pump, without departing from the scope of the present application. The first zincating pump and the second zincating pump are both zincating pumps, but are not the same zincating pump.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In a first aspect of the present application, a zinc adding device for a primary loop system of a pressurized water reactor nuclear power plant is provided, as shown in fig. 1, and includes a pump body 110, a shut-off valve 120, a zinc concentration measuring device 130, and a control device 140. The pump body 110 is connected with a zinc solution storage device and a shut-off valve 120, and the shut-off valve 120 and a zinc concentration measuring device 130 are connected with a main loop. The control device 140 is connected to the pump body 110, the shutoff valve 120 and the zinc concentration measuring device 130, and is configured to obtain the zinc concentration in the coolant in the primary loop detected by the zinc concentration measuring device 130, and adjust the operating states of the pump body 110 and the shutoff valve 120 according to the zinc concentration.
The pump body 110 is a mechanical device for delivering or pressurizing fluid, and the pump body 110 may be a positive displacement pump, a vane pump, or a jet pump. The shut-off valve 120 is also called a shut-off valve, and is a valve having a function of connecting or blocking a pipe. The shut-off valve 120 may be a gate valve, a stop valve, a ball valve, or a butterfly valve. Further, the shut-off valve 120 may be a pneumatic shut-off valve, a hydraulic shut-off valve, or an electric shut-off valve, depending on the power source. In one embodiment, the shut-off valve 120 is an electric shut-off valve, which does not need the cooperation of air sources and other devices, has the advantages of large action moment, adjustable opening and closing action speed, simple structure, easy maintenance and the like, and is beneficial to improving the comprehensive performance of a zinc adding device of a primary loop system of a pressurized water reactor nuclear power station. Further, the zinc concentration measuring device 130 may be a device that performs zinc concentration measurement based on a spectrophotometric method or a complex colorimetric method; the control device 140 may be a hardware module including various processing chips and peripheral circuits thereof and having a logic operation function. The processing chip may be a single chip, a DSP (Digital Signal processing) chip, or an FPGA (Field Programmable Gate Array). In one embodiment, the control device 140 is a PLC (Programmable Logic Controller) control device, and has the advantages of high reliability, strong anti-interference capability, portability, flexibility, low cost, and convenient maintenance.
Specifically, the zinc concentration measuring device 130 is connected to a primary loop main circuit, collects the zinc concentration in the coolant of the primary loop main circuit in real time, and sends the zinc concentration sampling value to the control device 140. The control device 140 compares the sampled value of the zinc concentration with a preset concentration threshold. The preset concentration threshold may be a fixed value, or an interval including an upper limit and a lower limit.
Take the case where the preset concentration threshold includes a preset upper concentration limit and a preset lower concentration limit as an example. As shown in fig. 2, when the sampled value of the zinc concentration is lower than the preset lower concentration limit, the control device 140 sends a high-level start signal to the pump body 110, and the pump body 110 starts to operate to pump the zinc solution in the zinc solution storage device. Meanwhile, the control device 140 controls the shut-off valve 120 to open, and the zinc solution in the zinc solution storage device enters the primary circuit through the pump body 110 and the shut-off valve 120 in sequence. In the process, the zinc concentration measuring device 130 collects the zinc concentration in the coolant of the primary loop in real time to obtain a zinc concentration sampling value, and the zinc concentration sampling value is sent to the control device 140. The sampled value of zinc concentration will rise due to the continuous injection of zinc solution. When the sampling value of the zinc concentration reaches the preset upper concentration limit, the control device 140 controls the shut-off valve 120 to close, and meanwhile, as shown in fig. 2, a low-level shutdown signal is sent to the pump body 110, the pump body 110 stops working, and the device stops injecting the zinc solution into the primary loop.
It is understood that in other embodiments, the control device 140 may also control the shut-off valve 120 to close when the sampled value of the zinc concentration is equal to the target value of the zinc concentration, and send a low-level shutdown signal to the pump body 110, so that the device stops injecting the zinc solution into the primary circuit. As shown in fig. 2, the target value of the zinc concentration is higher than a lower preset concentration limit, i.e., a lower zinc concentration limit, and lower than an upper preset concentration limit, i.e., an upper zinc concentration limit.
When the pump body 110 has a fault, zinc is continuously added to the primary circuit, and at the moment, the control device 140 controls the shutoff valve 120 to be closed, so that the continuous increase of the zinc concentration of the primary circuit can be avoided. It should be noted that the preset upper concentration limit should be less than or equal to the upper limit of the safety value of zinc concentration of the primary loop, and the preset upper concentration limit should be greater than or equal to the lower limit of the safety value of zinc concentration of the primary loop, so as to improve the zinc adding effect. Further, the control device 140 may close the shut-off valve 120 when the pump body 110 fails and the sampled value of the zinc concentration reaches the preset upper concentration limit, so as to ensure a sufficient amount of zinc addition.
In addition, when the zinc concentration measuring device 130 fails, the zinc concentration of the main loop of the primary loop is also abnormal. Based on this, the control device 140 can also close the shut-off valve 120 according to the alarm signal sent when the zinc concentration measuring device 130 fails, no matter whether the pump body 100 fails or not.
In one embodiment, the zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant further comprises a warning device connected with the control device 140 and used for displaying the current working state of each component in the zinc adding device and outputting alarm information when the zinc adding device fails. The alarm information is not unique in form, and can alarm in forms of audible and visual alarms, display alarms and the like, wherein the audible and visual alarms comprise indicator lights, loudspeakers and the like, and the display alarms comprise alarm forms of short messages, mails, voices and the like. In this embodiment, the alarm information and the working parameters and the zinc concentration sampling values of the components, including the pump body 110, the shut-off valve 120, the zinc concentration measuring device 130, and the control device 140, are also displayed in a correlated manner through the display interface, so that a user can know the specific component which is currently in fault on the display interface, and can process the component in time.
According to the zinc adding device for the primary circuit system of the pressurized water reactor nuclear power station, the shutoff valve 120 is arranged between the pump body 110 and the primary circuit main circuit, so that the shutoff valve 120 can be controlled to be closed when a fault occurs, the zinc adding device and the primary circuit main circuit are isolated, the zinc concentration of the primary circuit main circuit is prevented from continuously rising, and the zinc adding device is favorable for improving the use reliability.
In one embodiment, as shown in fig. 3, the primary loop system zincating apparatus of the pressurized water reactor nuclear power plant further includes a regulating valve 150, and the regulating valve 150 is connected to the pump body 110, the shut-off valve 120 and the control device 140. The regulating valve 150 may be a pneumatic, hydraulic or electric shut-off valve depending on the power source. In one embodiment, the regulating valve 150 is an electric shutoff valve, and does not need to be matched with equipment such as an air source and the like, so that the regulating valve has the advantages of large action moment, adjustable opening and closing action speed, simple structure, easiness in maintenance and the like, and is favorable for improving the comprehensive performance of a zinc adding device of a primary loop system of a pressurized water reactor nuclear power station.
Specifically, the regulator valve 150 is connected between the pump body 110 and the shut-off valve 120. The control device 140 is connected to the regulating valve 150, and can regulate the zincification rate by controlling the opening degree of the regulating valve 150. For example, the control device 140 may control the opening degree of the regulating valve 150 according to the relationship between the current sampled zinc concentration value and the preset concentration threshold value: when the current zinc concentration sampling value is lower than the zinc concentration target value, the larger the difference between the current zinc concentration sampling value and the zinc concentration target value is, the larger the valve opening is set to accelerate the zinc adding speed; when the current zinc concentration sampling value is higher than the zinc concentration target value, the larger the difference value between the current zinc concentration sampling value and the zinc concentration target value is, the smaller the valve opening is set to reduce the zinc adding speed.
Further, the control device 140 may employ a proportional-integral-derivative algorithm to obtain the desired zincating rate to achieve smooth data changes and reduce lead or lag. The expression for the zincing rate is:
wherein v is zn For the zinc adding rate, Delta c is the difference between the sampling value of the zinc concentration of the main loop of the circuit and the target value of the zinc concentration, K p For adjustable scale factor, τ D For adjustable differential time constant, τ I To adjust the integration time constant, τ is time. After the zincification rate is obtained, the control device 140 may divide the zincification rate by the concentration of the zinc solution in the zinc solution storage device to calculate the required injection flow rate of the zinc solution, and adjust the opening of the adjusting valve 150 in real time according to the required injection flow rate to achieve the purpose of adjusting the zincification rate.
In the above embodiment, the regulating valve 150 is disposed between the pump body 110 and the shut-off valve 120, and the control device 140 can precisely control the zincification rate by controlling the opening degree of the regulating valve 150 according to the requirement, which is beneficial to improving the accuracy of the zincification concentration and further improving the reliability of the zincification device.
In one embodiment, with continued reference to fig. 3, the loop system zincating apparatus of the pressurized water reactor nuclear power plant further includes a check valve 160, and the check valve 160 connects the shutoff valve 120 and the loop main loop.
Wherein, the check valve is also called as check valve and is used for preventing the fluid from flowing backwards. The check valve 160 may be a swing, lift, or clamp check valve. Specifically, the forward flow is defined as the flow of zinc solution from the storage tank to the main circuit of the circuit, and vice versa. When the solution flows forwards, the kinetic energy of the zinc solution enables the check valve to be automatically opened, and when the solution flows reversely, the check valve is automatically closed, so that the coolant in the main loop of the loop can be prevented from reversely flowing into the zinc adding device, and the operation stability of the whole loop system can be improved.
In one embodiment, with continued reference to fig. 3, pump body 110 includes a first zincating pump 111 and a second zincating pump 112; the first zinc adding pump 111 is connected with a zinc solution storage device and a regulating valve 150; the second zincating pump 112 is connected to the zinc solution storage means and the regulating valve 150.
For the specific limitations of the first zincating pump 111 and the second zincating pump 112, see the limitations of the pump body 110 above, and are not described herein again. Specifically, the first zincizing pump 111 and the second zincizing pump 112 may be used simultaneously or may be used as a backup for each other, and the control device 140 adjusts the working states of the two zincizing pumps according to the requirement.
For example, the control device 140 may implement a rotation start between two zincating pumps by a step counter to reduce the risk of fatigue damage for single pump operation. Further, when the first zincizing pump 111 or the second zincizing pump 112 fails to start, the control device 140 may output a failure signal and send a start signal to the other zincizing pump, so as to prevent the single pump from failing to continue to add zinc to the primary circuit. Further, the control device 140 may send the fault signal to an alarm device, and the alarm device outputs corresponding alarm information.
In one embodiment, the first zincification pump 111 and the second zincification pump 112 are the same type of zincification pump, that is, the types and rated operating parameters of the first zincification pump 111 and the second zincification pump 112 are the same, and can be replaced with each other, which is beneficial to reducing the control difficulty of the control device 140 and improving the operation convenience.
In a second aspect of the present application, a primary loop system of a pressurized water reactor nuclear power plant is provided, as shown in fig. 4, the primary loop system of the pressurized water reactor nuclear power plant includes a zinc solution storage device 200, a primary loop main loop 300, and the zinc adding device 100 of the primary loop system of the pressurized water reactor nuclear power plant is connected with the zinc solution storage device 200 and the primary loop main loop 300.
The zinc solution storage device 200 may be a tank or a box container for storing the zinc solution. A primary loop 300 is a coolant operation loop, and specifically includes a primary pump, a steam generator, and a reactor pressure shell, where the primary pump connects the steam generator and the reactor pressure shell. A reactor core comprised of fuel assemblies is placed in the reactor pressure shell and generates significant heat energy due to nuclear fuel fission. When the system works, the high-pressure coolant is pumped into the reactor by the main pump, the coolant brings the heat energy released by the fuel out of the reactor and into the steam generator, the heat energy is transferred to the two-loop cooling water through the heat transfer pipe in the steam generator, and the coolant after releasing the heat energy is sent back to the reactor by the main pump for reuse, and the process is repeated.
Specifically, the zinc concentration measuring device 130 in the zinc adding device 100 of the primary loop system of the pressurized water reactor nuclear power station is connected with the primary loop 300, collects the zinc concentration in the coolant of the primary loop 300 in real time, and sends the zinc concentration sampling value to the control device 140. The control device 140 compares the zinc concentration sampling value with a preset concentration threshold value, and controls the pump body 110 to start working to extract the zinc solution in the zinc solution storage device when the zinc concentration sampling value is lower than the preset concentration threshold value. Meanwhile, the control device 140 controls the shut-off valve 120 to open, and the zinc solution in the zinc solution storage device 200 enters the primary circuit 300 through the pump body 110 and the shut-off valve 120 in sequence. In the process, the zinc concentration measuring device 130 collects the zinc concentration in the coolant of the primary loop 300 in real time, obtains a zinc concentration sampling value and sends the zinc concentration sampling value to the control device 140. The sampled value of zinc concentration will rise due to the continuous injection of zinc solution. When the sampling value of the zinc concentration reaches the preset upper concentration limit, the control device 140 controls the shutoff valve 120 to close, and simultaneously controls the pump body 110 to stop working, and the zinc adding device stops injecting the zinc solution into the primary loop.
It is understood that, in other embodiments, the control device 140 may also control the shut-off valve 120 to close and control the pump body 110 to stop working when the sampled value of the zinc concentration is equal to the target value of the zinc concentration. The target value of the zinc concentration is higher than a preset lower concentration limit, namely a lower zinc concentration limit value, and is lower than a preset upper concentration limit, namely an upper zinc concentration limit value.
Further, when the pump body 110 fails, the zinc is continuously added to the primary circuit 300, and at this time, the control device 140 controls the shut-off valve 120 to close, so as to prevent the zinc concentration of the primary circuit 300 from continuously increasing. It should be noted that the preset upper concentration limit should be less than or equal to the upper limit of the safety value of zinc concentration of the main loop of the primary circuit, and the preset upper concentration limit should be greater than or equal to the lower limit of the safety value of zinc concentration of the main loop of the primary circuit, so as to improve the zinc adding effect. Further, the control device 140 may close the shut-off valve 120 when the pump body 110 fails and the sampled value of the zinc concentration reaches the preset upper concentration limit, so as to ensure a sufficient amount of zinc addition.
In addition, when the zinc concentration measuring device 130 fails, the zinc concentration of the primary circuit 300 is also abnormal. Based on this, the control device 140 can also close the shut-off valve 120 according to the alarm signal sent when the zinc concentration measuring device 130 fails, no matter whether the pump body 100 fails or not.
Above-mentioned pressurized water reactor nuclear power station primary circuit system, dispose shut-off valve 120 in pressurized water reactor nuclear power station primary circuit system adds zinc device 100, controlling means 140 can be when adding zinc device 100 and break down, control shut-off valve 120 closes, keep apart zinc device 100 and a return circuit major loop 300, avoid a return circuit major loop zinc concentration to continuously rise, be favorable to improving the service reliability who adds the zinc device, and then promote a return circuit system add the zinc effect, the life of extension a return circuit system.
In one embodiment, as shown in fig. 5, the primary loop system of the pressurized water reactor nuclear power plant further comprises a letdown loop 400; the bleed-down circuit 400 is connected to a main circuit 300; the junction of the zinc adding device 100 of the primary loop system of the pressurized water reactor nuclear power plant and the primary loop 300 is located downstream of the letdown loop 400.
The bleed-down circuit 400 is an operation circuit for injecting water or a high-concentration boron solution into the primary circuit 300. Specifically, to change the power of the pressurized water reactor core, it is generally necessary to inject water or a high-concentration boron solution into the primary main circuit 300 for the dilution or boronation of the coolant. The connection point of the zinc adding device 100 of the primary loop system of the pressurized water reactor nuclear power station and the primary loop 300 is arranged at the downstream of the downward drainage loop 400, so that zinc solution can be prevented from entering the downward drainage loop 400, and the zinc adding rate can be calculated and regulated conveniently.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are all within the scope of the present application. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A zinc adding device for a primary circuit system of a pressurized water reactor nuclear power station is characterized by comprising:
the pump body is connected with the zinc solution storage device;
a shutoff valve connecting the pump body and a primary circuit main loop;
the shutoff valve is connected with the main loop of the primary loop, so that the coolant in the main loop of the primary loop is prevented from reversely flowing into the check valve of the zinc adding device;
the zinc concentration measuring device is connected with the primary loop of the primary loop and is used for detecting the concentration of zinc in the coolant of the primary loop;
the control device is connected with the pump body, the shut-off valve and the zinc concentration measuring device and used for adjusting the working states of the pump body and the shut-off valve according to the zinc concentration;
and the warning device is connected with the control device, displays the current working state of the pump body, the shutoff valve, the zinc concentration measuring device and the control device, and outputs alarm information when a fault occurs.
2. The zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant as recited in claim 1, further comprising a regulating valve, wherein the regulating valve is connected with the pump body, the shut-off valve and the control device.
3. The zincification device for the primary loop system of the pressurized water reactor nuclear power plant as claimed in claim 2, wherein the regulating valve is an electric regulating valve.
4. The zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant as recited in claim 1, wherein the check valve is a swing type, a lifting type or a wafer type check valve.
5. The zinc adding device of the primary circuit system of the pressurized water reactor nuclear power plant as recited in claim 1, wherein the control device is a PLC control device.
6. The zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant as recited in claim 1, wherein the shut-off valve is an electric shut-off valve.
7. The pressurized water reactor nuclear power plant primary circuit system zincification device as claimed in any one of claims 2 to 6, wherein the pump body comprises a first zincification pump and a second zincification pump; the first zinc adding pump is connected with the zinc solution storage device and the regulating valve; the second zinc adding pump is connected with the zinc solution storage device and the regulating valve.
8. The zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant as recited in claim 7, wherein the first zinc adding pump and the second zinc adding pump are of the same type.
9. A primary loop system of a pressurized water reactor nuclear power plant, which is characterized by comprising a zinc solution storage device, a primary loop main loop and the zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant as set forth in any one of claims 1 to 8, wherein the zinc adding device of the primary loop system of the pressurized water reactor nuclear power plant is connected with the zinc solution storage device and the primary loop main loop.
10. The primary circuit system of a pressurized water reactor nuclear power plant as recited in claim 9, further comprising a letdown circuit; the lower leakage loop is connected with the main loop of the loop; and the connection point of the zinc adding device of the primary circuit system of the pressurized water reactor nuclear power station and the primary circuit main circuit is positioned at the downstream of the downward drainage circuit.
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| CN202122268170.6U CN217333647U (en) | 2021-09-17 | 2021-09-17 | Primary loop system of pressurized water reactor nuclear power station and zinc adding device thereof |
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