CN111446012A - Spent fuel pool cooling system - Google Patents
Spent fuel pool cooling system Download PDFInfo
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- CN111446012A CN111446012A CN201910041214.6A CN201910041214A CN111446012A CN 111446012 A CN111446012 A CN 111446012A CN 201910041214 A CN201910041214 A CN 201910041214A CN 111446012 A CN111446012 A CN 111446012A
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- cooling pipe
- cooling
- spent fuel
- fuel pool
- heat exchanger
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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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- 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 invention provides a spent fuel pool cooling system, which comprises: the first end of the first cooling pipe is a water intake which is arranged on the side wall of the spent fuel pool, the second end of the first cooling pipe is arranged in the spent fuel pool, and a first isolation valve, a first water pump and a first heat exchanger are sequentially arranged in the first cooling pipe along the direction from the first end to the second end of the first cooling pipe; the first end of the second cooling pipe is communicated with the first position of the first cooling pipe, the second end of the second cooling pipe is communicated with the second position of the first cooling pipe, and a second isolating valve, a second water pump and a second heat exchanger are sequentially arranged in the second cooling pipe along the direction from the first end to the second end of the second cooling pipe. Therefore, the structure of the spent fuel pool cooling system is simplified, the system reliability is improved, and the use cost is reduced.
Description
Technical Field
The invention relates to the technical field of spent fuel pools, in particular to a spent fuel pool cooling system.
Background
A spent fuel pool is an important component of a nuclear power plant, and a cooling system is generally provided in the spent fuel pool. The cooling system of the spent fuel pool takes out heat generated by decay of spent fuel when a generator set of the nuclear power station normally operates, so that the temperature in the spent fuel pool is maintained within a normal range. In practical application, generally include many cooling tubes among the cooling system in spent fuel pond, and all be provided with parts such as solitary water intaking mouth, water intaking pipeline, cooling water pump and heat exchanger in each cooling tube, it can be seen that the structure of the cooling system in present spent fuel pond is comparatively redundant, and use cost is higher.
Disclosure of Invention
The embodiment of the invention aims to provide a spent fuel pool cooling system, which solves the problems that the structure of the conventional spent fuel pool cooling system is redundant and the use cost is high.
In order to achieve the above object, an embodiment of the present invention provides a spent fuel pool cooling system, which is applied in a nuclear island, and the spent fuel pool cooling system includes:
the first ends of the first cooling pipes are water intake ports which are arranged on the side wall of the spent fuel pool, the second ends of the first cooling pipes are arranged in the spent fuel pool, and a first isolation valve, a first water pump and a first heat exchanger are sequentially arranged in the first cooling pipes along the direction from the first ends to the second ends of the first cooling pipes;
the first end of the second cooling pipe is communicated with the first position of the first cooling pipe, the second end of the second cooling pipe is communicated with the second position of the first cooling pipe, the first position is a position between the first end of the first cooling pipe and the first isolation valve, the second position is a position between the first heat exchanger and the second end of the first cooling pipe, and the second isolation valve, the second water pump and the second heat exchanger are sequentially arranged in the second cooling pipe along the direction from the first end to the second end of the second cooling pipe.
Optionally, two first isolation valves, the first water pump and the first heat exchanger are sequentially arranged in the first cooling pipe, a first communication port is arranged on the first cooling pipe and between the two first isolation valves, and a first end of the second cooling pipe is communicated with the first communication port;
and a second communicating opening is formed in the first cooling pipe and is positioned between the first heat exchanger and the second end of the first cooling pipe, and the second end of the second cooling pipe is communicated with the second communicating opening.
Optionally, the first end of the second cooling pipe is communicated with the first communication port through two second isolation valves, and the second end of the second cooling pipe is communicated with the second communication port through one second isolation valve.
Optionally, a first flowmeter is arranged in the first cooling pipe and between the first heat exchanger and the second communication port;
a second flow meter is disposed in the second cooling tube at a location between the second heat exchanger and the second end of the second cooling tube.
Optionally, a first flow rate adjusting device is disposed in the first cooling pipe and between the first flow meter and the second communication port;
and a second flow regulating device is arranged in the second cooling pipe and positioned between the second flowmeter and the second end of the second cooling pipe.
Optionally, the first isolation valve, the first water pump and the first flow meter in the first cooling pipe are respectively electrically connected to a safety-level power supply column in the nuclear island; and/or the presence of a gas in the gas,
and a second isolation valve, a second water pump and a second flow meter in the second cooling pipe are respectively and electrically connected with a non-safety power supply column in the nuclear island.
Optionally, the spent fuel pool cooling system further comprises a standby power supply, and the first isolation valve, the first water pump and the first flow meter in the first cooling pipe are respectively electrically connected with the standby power supply.
Optionally, a switching power supply line switching device is further disposed in the second cooling pipe, and the switching power supply line switching device is configured to switch power supply of the second isolation valve, the second water pump, and the second flowmeter in the second cooling pipe from the non-safety-level power supply line to the safety-level power supply line.
Optionally, each first heat exchanger is connected with safety-level cooling water in the nuclear island; the second heat exchanger is connected with non-safety-level cooling water in the nuclear island.
Optionally, a first control valve is arranged in the first cooling pipe and at each side position of the first water pump and each side position of the first heat exchanger;
a second control valve is provided in the second cooling pipe at each side position of the second water pump and at each side position of the second heat exchanger.
Optionally, a siphon breaker and a check valve are connected to the second end of the first cooling pipe.
Optionally, the spent fuel pool cooling system further comprises a branch pipe, and the branch pipe is respectively communicated with the first cooling pipe and the second cooling pipe.
Optionally, the water intake ports of any two first cooling pipes are arranged at different heights on the side wall of the spent fuel pool.
One of the above technical solutions has the following advantages or beneficial effects:
the embodiment of the invention provides a spent fuel pool cooling system, which comprises: the first end of the first cooling pipe is a water intake which is arranged on the side wall of the spent fuel pool, the second end of the first cooling pipe is arranged in the spent fuel pool, and a first isolation valve, a first water pump and a first heat exchanger are sequentially arranged in the first cooling pipe along the direction from the first end to the second end of the first cooling pipe; the first end of the second cooling pipe is communicated with the first position of the first cooling pipe, the second end of the second cooling pipe is communicated with the second position of the first cooling pipe, the first position is a position between the first end of the first cooling pipe and the first isolation valve, the second position is a position between the first heat exchanger and the second end of the first cooling pipe, and the second isolation valve, the second water pump and the second heat exchanger are sequentially arranged in the second cooling pipe along the direction from the first end to the second end of the second cooling pipe. Like this, the second cooling tube can with first cooling tube sharing water intake and set up the second end of the first cooling tube in spent fuel pond to retrench spent fuel pond cooling system's structure, improved system reliability, reduced use cost simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a spent fuel pool cooling system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a spent fuel pool cooling system, which is applied in a nuclear island, and the spent fuel pool cooling system includes:
the cooling system comprises at least two first cooling pipes 1, wherein a water intake 101 is arranged at a first end of each first cooling pipe 1, the water intake 101 is arranged on the side wall of a spent fuel water pool 2, a second end of each first cooling pipe 1 is arranged in the spent fuel water pool 2, and a first isolation valve 102, a first water pump 103 and a first heat exchanger 104 are sequentially arranged in each first cooling pipe 1 along the direction from the first end to the second end of each first cooling pipe 1;
at least one second cooling pipe 3, a first end of the second cooling pipe 3 is communicated with a first position of the first cooling pipe 1, a second end of the second cooling pipe 3 is communicated with a second position of the first cooling pipe 1, the first position is a position between the first end of the first cooling pipe 1 and the first isolation valve 102, the second position is a position between the first heat exchanger 104 and the second end of the first cooling pipe 1, and a second isolation valve 301, a second water pump 302 and a second heat exchanger 303 are sequentially arranged in the second cooling pipe 3 along a direction from the first end to the second end of the second cooling pipe 3.
In this embodiment, the portion of the first cooling pipe from the water intake 101 to the connection with the first end of the second cooling pipe 3 may be referred to as a water intake pipe, and the first cooling pipe 1 and the second cooling pipe 3 may share the water intake pipe, the water intake 101, and the second end of the first cooling pipe 1 placed in the spent fuel pool 2, so as to reduce the number of devices in the whole spent fuel pool system and the maintenance cost of device maintenance.
In addition, if only one water intake is adopted, when the water intake fails, the whole spent fuel pool cooling system cannot extract hot water from the spent fuel pool 2, so that the cooling function of the spent fuel pool 2 cannot be realized.
Compared with the embodiment with only one water intake port, each first cooling pipe 1 in the present embodiment can take water from the spent fuel pool 2 through the water intake port 101, and make the water pass through the first isolation valve 102, the first water pump 103 and the first heat exchanger 104 in the first cooling pipe 1 in sequence, so that after the heat exchange of the water is completed, the water after the heat exchange is completed is returned to the spent fuel pool 2 through the second end of the first cooling pipe 1, and the temperature of the water in the spent fuel pool 2 can be kept within a normal range (generally not higher than 50 degrees celsius). It should be noted that, because the spent fuel pool cooling system in the embodiment includes at least two first cooling pipes 1, when one first cooling pipe 1 fails, the other first cooling pipe 1 can still work normally, thereby improving the stability of the spent fuel pool cooling system.
The first isolation valve 102 and the second isolation valve 301 may be both electrically-operated isolation valves, which facilitates the opening and closing of the first isolation valve 102 and the second isolation valve 301, respectively.
The first heat exchanger 104 may be connected to an equipment cooling water system 1041, and the equipment cooling water system 1041 may include a water intake line and a water return line, wherein the water intake line may draw cold water from the cooling water system into the first heat exchanger 104 to exchange heat with hot water drawn from the spent fuel pool 2 through the first cooling pipe 1, and the water return line is used to deliver the cold water after heat exchange into the cooling water system. And the hot water after being cooled by heat exchange in the first cooling pipe 1 can continue to return to the spent fuel pool 2 along the first cooling pipe 1.
The first heat exchanger 104 is a safety-level cooling water line (may also be referred to as safety-level cooling water) of the facility cooling water system 1041, and is a safe user of the facility cooling water system 1041. The facility cooling water system to which the second heat exchanger 303 is connected is non-safety-level cooling water (may also be referred to as non-safety-level cooling water) and is a common user of the facility cooling water system. And the second heat exchanger 303 may be further connected to an equipment cooling water system 1041 in the first heat exchanger 104, and when an accident occurs, the non-safety-level cooling water is not available, and the second cooling pipe may cool the hot water in the spent fuel pool by using the equipment cooling water system 1041 in the first heat exchanger 104. Therefore, the structure of the spent fuel pool cooling system is further simplified, the system reliability is improved, and the use cost is further reduced.
In addition, the first isolation valve 102, the first water pump 103 and the first heat exchanger 104 in each first cooling pipe 1 can be electrically connected with an independent power supply line, and the second isolation valve 301, the second water pump 302 and the second heat exchanger 303 in each second cooling pipe 3 can also be electrically connected with an independent power supply line, so that when a certain power supply line fails, the spent fuel water pool cooling system can still realize the cooling function of the spent fuel water pool 2, and the stability of the spent fuel water pool cooling system is improved.
Referring to fig. 1, the spent fuel pool cooling system includes a first cooling pipe a, a first cooling pipe C, and a second cooling pipe B, and the first cooling pipe a, the first cooling pipe C, and the second cooling pipe B may be respectively used in combination under different working conditions. For example: when the nuclear power station runs to maintenance cold shutdown under power, the first cooling pipe A or the second cooling pipe B can work, and the first cooling pipe C does not work so as to take away heat load in the spent fuel water pool 2; when the nuclear power station is in a working condition of refueling and shutdown of the generator set, the first cooling pipe A and the second cooling pipe B work, and the first cooling pipe C does not work so as to take away heat load in the spent fuel water pool 2; when one first cooling pipe (for example, the first cooling pipe a) of the nuclear power plant is in a maintenance condition, the second cooling pipe B and the first cooling pipe C may be in an operating state to take away a heat load in the spent fuel pool 2.
In addition, when the nuclear power station is in an accident condition, if the first cooling pipe A fails, the first cooling pipe C can normally operate. It should be noted that, when only one of the first cooling pipe a and the first cooling pipe C can be used normally, the temperature of the spent fuel pool 2 is generally not higher than 80 degrees celsius, and when both the first cooling pipe a and the first cooling pipe C can be used normally, the temperature of the spent fuel pool 2 is generally not higher than 50 degrees celsius.
Note that, the temperature of the water in the spent fuel pool 2 may be detected by a worker through a sensor.
Optionally, referring to fig. 1, two first isolation valves 102, the first water pump 103, and the first heat exchanger 104 are sequentially disposed in the first cooling pipe 1, a first communication port is disposed on the first cooling pipe 1 and located between the two first isolation valves 102, and a first end of the second cooling pipe 3 is communicated with the first communication port;
a second communication port is provided in the first cooling pipe 1 at a position between the first heat exchanger 104 and the second end of the first cooling pipe 1, and the second end of the second cooling pipe 3 is communicated with the second communication port.
Wherein, the first end of second cooling tube 3 can be connected with many water pipes, and each water pipe all can communicate with the first opening of a first cooling tube 1. Similarly, the second end of the second cooling tube 3 may also be connected to a plurality of branch water tubes, each branch water tube being communicated with the second communication port of one first cooling tube 1.
In the embodiment of the invention, as the two first isolation valves are arranged in the first cooling pipe, and the first end of the second cooling pipe is communicated with the first communication port arranged between the two first isolation valves, when the connection between the first end of the second cooling pipe and one first communication port fails, the first isolation valve is closed, so that the leakage of hot water extracted from the spent fuel water pool can be avoided, and the normal operation of other first cooling pipes can be ensured. The stability of the whole spent fuel cooling system is improved.
Optionally, the first end of the second cooling pipe 3 is communicated with the first communication port through two second isolation valves 301, and the second end of the second cooling pipe 3 is communicated with the second communication port through one second isolation valve 301.
A second isolation valve 301 may be disposed on the second cooling pipe 3, and a second isolation valve 301 may be disposed on each branch pipe connected to the first end of the second cooling pipe 3.
Of course, one or two second isolation valves 301 may be disposed on each branch pipe connected to the first end of the second cooling pipe 3, and the specific manner is not limited herein.
In the embodiment of the invention, when a certain branch water pipe or a certain first cooling pipe communicated with the certain branch water pipe is broken, the second isolation valve on the branch water pipe can be closed, so that the second cooling pipe can extract hot water from the first cooling pipe through other branch water pipes, and the stability of the spent fuel water pool cooling system is improved.
Optionally, referring to fig. 1, a first flow meter 105 is disposed in the first cooling pipe 1 and between the first heat exchanger 104 and the second communication port;
a second flow meter 304 is provided in the second cooling pipe 3 at a position between the second heat exchanger 303 and the second end of the second cooling pipe 3.
In the embodiment of the invention, the first flow meter is arranged in the first cooling pipe, and the second flow meter is arranged in the second cooling pipe, so that the flow of the hot water passing through the first cooling pipe and the second cooling pipe can be accurately counted, a worker can conveniently and subsequently adjust the flow of the hot water passing through the first cooling pipe and the second cooling pipe, and the phenomenon that the flow of the hot water passing through one of the first cooling pipe and the second cooling pipe is uneven is avoided.
Optionally, referring to fig. 1, a first flow rate adjusting device 106 is disposed in the first cooling pipe 1 and between the first flow meter 105 and the second communication port;
a second flow rate adjusting device 305 is provided in the second cooling pipe 3 at a position between the second flow meter 304 and the second end of the second cooling pipe 3.
The first flow regulating device 106 and the second flow regulating device 305 may be both flow regulating valves, and the specific type is not limited herein.
In the embodiment of the invention, the first cooling pipe is provided with the first flow regulating device, and the second cooling pipe is provided with the second flow regulating device, so that the flow of hot water passing through the first cooling pipe and the second cooling pipe can be regulated more conveniently by workers.
Optionally, the first isolation valve 102, the first water pump 103 and the first flow meter 105 in the first cooling pipe 1 are respectively electrically connected with a safety power supply line of the nuclear island; and/or the presence of a gas in the gas,
a second isolation valve 301, a second water pump 302 and a second flow meter 304 in the second cooling pipe are each electrically connected to a non-safety power supply column of the nuclear island.
The power supply levels of the first cooling pipes 1 are all supplied by a safety-level power supply (also called a safety-level power supply column) of the nuclear island, while the power supply of the second cooling pipes 3 can be supplied by the safety-level power supply of any first cooling pipe 1, and of course, the power supply of the second cooling pipes 3 can also be supplied by an unsafe-level power supply column of the nuclear island independently. In addition, the electric devices such as the first isolation valve 102, the first water pump 103, and the first flow meter 105 in the first cooling pipe 1 may be electrically connected to a backup power supply, for example: the backup power source may be a diesel generator or a mobile power source.
The Safety Classification method for Structures, Systems, and Components in the Nuclear island is defined in "Nuclear Power plant item Classification", published by International Atomic Energy Agency (IAEA) in 2014, namely, "Safety Classification of Structures, Systems and Components in Nuclear Power Plants" (No. ssg-30-2014). The safety-level power supply line refers to a power supply system meeting the safety-level power supply requirement specified in the design and construction rules of electrical equipment of a nuclear island of a pressurized water reactor nuclear power plant (RCC-E-2005), and the non-safety-level power supply line refers to a power supply system meeting the non-safety-level power supply requirement specified in the above document. The safe cooling water refers to a cooling water system meeting the safety requirement of design and regulation of mechanical equipment of a pressurized water reactor nuclear island (RCC-M-2007), and the unsafe cooling water refers to a cooling water system meeting the non-safety requirement of design and regulation of mechanical equipment of a pressurized water reactor nuclear island (RCC-M-2007).
It should be noted that, when the nuclear island is in a design basis accident, the safety-level power supply line can supply power normally, but the non-safety-level power supply line cannot supply power normally, and similarly, when the nuclear island is in a design basis accident, the safety-level cooling water can also supply cooling water normally, but the non-safety-level cooling water cannot supply cooling water normally.
In the embodiment of the invention, the first isolating valve, the first water pump and the first flowmeter in the first cooling pipe are respectively and electrically connected with a safe power supply line of the nuclear island, and the safe power supply line can normally supply power under an accident condition, so that the first isolating valve, the first water pump and the first flowmeter in the first cooling pipe can still normally work under the accident condition, and the reliability of the whole spent fuel pool cooling system is improved.
Optionally, the spent fuel pool cooling system further comprises a standby power supply, and the first isolation valve 102, the first water pump 103 and the first flow meter 105 in the first cooling pipe 1 are electrically connected to the standby power supply respectively.
Wherein the backup power source may include at least one of a generator and a mobile power source. And the generator can be diesel generator, in addition, when stand-by power supply is portable power source, need be provided with an electricity interface in the first cooling tube 1 for be connected with portable power source electricity, thereby under accident condition, can supply power to first isolating valve 102, first water pump 103 and first flowmeter 105 in the first cooling tube 1 through portable power source, thereby further reinforcing whole spent fuel water pool cooling system's reliability.
In the embodiment of the invention, the spent fuel pool cooling system further comprises a standby power supply, and the first isolating valve, the first water pump and the first flow meter in the first cooling pipe are respectively and electrically connected with the standby power supply, so that the reliability of the whole spent fuel pool cooling system can be further enhanced.
Optionally, a switching power supply train switching device is further disposed in the second cooling pipe 3, and the switching power supply train switching device is configured to switch the power supply of the second isolation valve 301, the second water pump 302, and the second flow meter 304 in the second cooling pipe 3 from the non-safety power supply train to the safety power supply train.
One end of the switching power supply line switching device may be electrically connected to the non-safety power supply line and the safety power supply line, respectively, and the other end of the switching power supply line switching device may be electrically connected to the electric devices such as the second isolation valve 301, the second water pump 302, and the second flowmeter 304 in the second cooling pipe 3, respectively.
In the embodiment of the invention, the second cooling pipe is also provided with a switching device for switching the power supply line, so that the power supply flexibility of the second isolation valve, the second water pump and the second flowmeter in the second cooling pipe can be further enhanced.
Alternatively, referring to fig. 1, a first control valve 107 is disposed in the first cooling pipe 1 at each side position of the first water pump 103 and at each side position of the first heat exchanger 104;
a second control valve 306 is provided in the second cooling pipe 3 at each side position of the second water pump 302 and at each side position of the second heat exchanger 303.
It should be noted that the second end of the second cooling pipe 3 can communicate with each first cooling pipe 1 through a second control valve 306.
In the embodiment of the invention, when the first control valves on two sides of the first water pump or the first heat exchanger are closed, hot water can be prevented from flowing through the first water pump or the first heat exchanger, so that the first water pump or the first heat exchanger can be conveniently repaired or replaced. Similarly, when the second control valves on the two sides of the second water pump or the second heat exchanger are closed, the worker can also overhaul or replace the second water pump or the second heat exchanger.
Optionally, referring to fig. 1, a siphon breaker 4 and a check valve are connected to the second end of the first cooling pipe 1.
The order of the siphon breaker 4 and the check valve is not limited herein, and for example: the siphon breaker 4 may be provided near the second end of the first cooling pipe 1, and the check valve may be provided near the second end of the first cooling pipe 1.
In the embodiment of the invention, the second end of the first cooling pipe is connected with the siphon breaker and the check valve, so that hot water in the spent fuel pool can be prevented from flowing back to the first cooling pipe through the second end.
Optionally, referring to fig. 1, the spent fuel pool cooling system further includes a branch pipe 5, and the branch pipe 5 is respectively communicated with the first cooling pipe 1 and the second cooling pipe 3.
It should be noted that a plurality of third control valves may be disposed on the branch pipe 5, wherein the third control valves have the same structure and function as the first control valve 107 and the second control valve 306.
In the embodiment of the invention, the branch pipe can be communicated with each first cooling pipe and each second cooling pipe, so that a water pump (such as a first water pump) in one first cooling pipe can be combined with a heat exchanger (such as a first heat exchanger) in the other first cooling pipe, and the stability of the spent fuel pool cooling system is better.
Optionally, the water intake ports 101 of any two first cooling pipes 1 are arranged at different heights on the side wall of the spent fuel water pool 2.
In the embodiment of the invention, the water intake ports of any two first cooling pipes are arranged at different heights on the side wall of the spent fuel pool, so that the water intake ports of the first cooling pipes are prevented from being excessively concentrated. The first cooling pipe can be more convenient to take water from the spent fuel pool.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A spent fuel pool cooling system is applied to a nuclear island, and is characterized by comprising:
the first ends of the first cooling pipes are water intake ports which are arranged on the side wall of the spent fuel pool, the second ends of the first cooling pipes are arranged in the spent fuel pool, and a first isolation valve, a first water pump and a first heat exchanger are sequentially arranged in the first cooling pipes along the direction from the first ends to the second ends of the first cooling pipes;
the first end of the second cooling pipe is communicated with the first position of the first cooling pipe, the second end of the second cooling pipe is communicated with the second position of the first cooling pipe, the first position is a position between the first end of the first cooling pipe and the first isolation valve, the second position is a position between the first heat exchanger and the second end of the first cooling pipe, and the second isolation valve, the second water pump and the second heat exchanger are sequentially arranged in the second cooling pipe along the direction from the first end to the second end of the second cooling pipe.
2. The spent fuel pool cooling system according to claim 1, wherein two first isolation valves, the first water pump and the first heat exchanger are sequentially arranged in the first cooling pipe, a first communication port is arranged on the first cooling pipe and between the two first isolation valves, and a first end of the second cooling pipe is communicated with the first communication port;
and a second communicating opening is formed in the first cooling pipe and is positioned between the first heat exchanger and the second end of the first cooling pipe, and the second end of the second cooling pipe is communicated with the second communicating opening.
3. The spent fuel pool cooling system according to claim 2, wherein the first end of the second cooling pipe is communicated with the first communication port through two second isolation valves, and the second end of the second cooling pipe is communicated with the second communication port through one second isolation valve.
4. The spent fuel pool cooling system according to claim 2, wherein a first flow meter is provided in the first cooling pipe at a position between the first heat exchanger and the second communication port;
a second flow meter is disposed in the second cooling tube at a location between the second heat exchanger and the second end of the second cooling tube.
5. The spent fuel pool cooling system according to claim 4, wherein a first flow rate adjusting device is provided in the first cooling pipe at a position between the first flow meter and the second communication port;
and a second flow regulating device is arranged in the second cooling pipe and positioned between the second flowmeter and the second end of the second cooling pipe.
6. The spent fuel pool cooling system according to claim 4, wherein the first isolation valve, the first water pump and the first flow meter in the first cooling pipe are each electrically connected to a safety-class power supply column in the nuclear island; and/or the presence of a gas in the gas,
and a second isolation valve, a second water pump and a second flow meter in the second cooling pipe are respectively and electrically connected with a non-safety power supply column in the nuclear island.
7. The spent fuel pool cooling system according to claim 6, further comprising a backup power source, wherein the first isolation valve, the first water pump and the first flow meter in the first cooling pipe are each electrically connected to the backup power source.
8. The spent fuel pool cooling system according to claim 6, wherein a switching power supply train switching device is further arranged in the second cooling pipe, and the switching power supply train switching device is used for switching the second isolation valve, the second water pump and the second flow meter in the second cooling pipe from the non-safety power supply train power supply to the safety power supply train power supply.
9. The spent fuel pool cooling system according to claim 1, wherein each first heat exchanger is connected with a safety-level cooling water in the nuclear island; the second heat exchanger is connected with non-safety-level cooling water in the nuclear island.
10. The spent fuel pool cooling system according to claim 1, wherein a first control valve is provided in the first cooling pipe at each side position of the first water pump and at each side position of the first heat exchanger;
a second control valve is provided in the second cooling pipe at each side position of the second water pump and at each side position of the second heat exchanger.
11. The spent fuel pool cooling system according to claim 1, further comprising a branch pipe, the branch pipe being in communication with the first cooling pipe and the second cooling pipe, respectively.
12. The spent fuel pool cooling system according to any one of claims 1 to 11, wherein the water intake ports of any two first cooling pipes are arranged at different heights on the side wall of the spent fuel pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041214.6A CN111446012A (en) | 2019-01-16 | 2019-01-16 | Spent fuel pool cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910041214.6A CN111446012A (en) | 2019-01-16 | 2019-01-16 | Spent fuel pool cooling system |
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| CN111446012A true CN111446012A (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345608A (en) * | 2021-04-28 | 2021-09-03 | 中广核研究院有限公司 | Spent fuel pool cooling and purification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345608A (en) * | 2021-04-28 | 2021-09-03 | 中广核研究院有限公司 | Spent fuel pool cooling and purification system |
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