GB2576253A - Plant auxiliary cooling facility - Google Patents
Plant auxiliary cooling facility Download PDFInfo
- Publication number
- GB2576253A GB2576253A GB1909579.3A GB201909579A GB2576253A GB 2576253 A GB2576253 A GB 2576253A GB 201909579 A GB201909579 A GB 201909579A GB 2576253 A GB2576253 A GB 2576253A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circulation pump
- heat exchanger
- cooling
- upstream
- cooling system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- G21C15/24—Promoting flow of the coolant
-
- 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
-
- 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
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/04—Pumping arrangements
-
- 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
-
- 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
A plant auxiliary cooling facility 20 includes a heat exchanger 4 a water feed pump 7 for feeding seawater to the heat exchanger, a closed loop cooling system 2 for circulating cooling water between reactor auxiliaries 3 of the nuclear power plant and the heat exchanger, a first circulation pump 1 provided on the cooling system, a surge tank 6 for giving a hydrostatic head to the first circulation pump, first branch pipes 10a, 10b for connecting downstream of the first circulation pump of the cooling system with upstream of the heat exchanger and downstream of the heat exchanger of the cooling system with upstream of the reactor auxiliaries thus bypassing the heat exchanger, a cooling tower 11 provided on the first branch pipes, and first switching valves 12a, 12b capable of switching destination of the cooling water discharged from the first circulation pump from the heat exchanger to the cooling tower. The system builds in redundancy in case the water feed pump fails to provide water to the cooling system. Control circuits may be provided to control the valves.
Description
PLANT AUXILIARY COOLING FACILITY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plant auxiliary cooling facility.
2. Description of Related Art
JP-A-H11-30685, for example, discloses a plant auxiliary cooling facility. JP-A-H11-30685 discloses The auxiliary cooling system 24 performs the cooling operation by circulating the auxiliary cooling water via the auxiliary cooling system pump 35a provided in the cooling pipe 28a, and circulating auxiliary cooling water via the intermediate heat exchanger 33 with respect to the high pressure core injection system 4 and the low pressure coolant injection system 5 having a residual heat removal function, which communicate with each other by a pipe branched from cooling pipes 28a and 28b, and other load 36 in a section II. Further, the high pressure core injection system 4 is to be installed on a side of the cooling apparatus 27 with respect to the other heat loads 5 and 36. The heat is generally discharged into the sea as a final heat sink, via the seawater cooling system 30 by the seawater cooling system pump 35b from the intermediate heat exchanger 33. (Paragraph [0048]), Since an amount of heat removed by the auxiliary cooling system 24 is relatively small, a relatively small apparatus may be used as the cooling apparatus 27 of the auxiliary cooling system 24. For example, it is preferable to adopt an apparatus such as a cooling tower that performs air cooling by dropping the cooling water and an air fin cooler that performs air cooling from a periphery of a pipe by taking a large heat transfer area of a pipe through which the cooling water flows. (Paragraph [0049]), According to this configuration, by opening the isolation valves 34a and 34b and closing the isolation valves 34c and 34d on the side of the cooling apparatus 27, the heat loads 4, 5 and 36 of Section II including the high pressure core injection system 4 are cooled down by the auxiliary cooling system 24 and the seawater cooling system 30. That is, the circulation path of the auxiliary cooling water in this case is the same as the conventional auxiliary cooling system 19 shown in FIG. 11. However, by closing the isolation valves 34a and 34b and closing the isolation valves 34c and 34d on the side of the cooling apparatus 27, the heat load of the high pressure core injection system 4 can be completely isolated from the circulation path of the cooling water for the other heat loads of the auxiliary cooling system 24 to be cooled down by the cooling apparatus
27. (Paragraph [0051]).
In the plant auxiliary cooling system disclosed in JP-A-H11-30685, for example, when there is a blockage in an intake screen of a seawater cooling system pump (water feed pump) due to generation of a large amount of marine organisms, when the seawater cooling system pump (water feedpump) breaks, or when a pipe connecting between the seawater cooling system pump and an intermediate heat exchanger is blocked or damaged, the seawater cannot be distributed through the intermediate heat exchanger (heat exchanger) . As a result, the heat of the cooling water circulating in the auxiliary cooling system (closed loop cooling system) cannot be dissipated to the seawater, and the auxiliary machine cooling function is lost.
SUMMARY OF THE INVENTION
The present invention is to provide a plant auxiliary cooling facility capable of cooling all of the reactor auxiliaries even when a function of dissipating the heat of cooling water to seawater is lost.
According to the present invention, the plant auxiliary cooling facility includes: a heat exchanger, a water feed pump for feeding seawater to the heat exchanger, a closed loop cooling system for circulating the cooling water between reactor auxiliaries of a nuclear power plant and the heat exchanger, a first circulation pump provided on the closed loop cooling system, a surge tank for giving a hydrostatic head to the first circulation pump, first branch pipes for connecting a point in the downstream of the first circulation pump and in the upstream of the heat exchanger in the closed loop cooling system, with a point in the downstream of the heat exchanger and in the upstream of the reactor auxiliaries in the closed loop cooling system, a cooling tower provided on the first branch pipes, and first switching valves capable of switching the destination of the cooling water discharged from the first circulation pump from the heat exchanger to the cooling tower.
According to the present invention having the above configuration, the heat of cooling water circulating in a closed loop cooling system can be dissipated in a cooling tower by switching the destination of the cooling water discharged from a first circulation pump from a heat exchanger to the cooling tower by using a first switching valve. As a result, even when a function of the heat exchanger is lost, all of the reactor auxiliaries can be cooled down.
In the plant auxiliary cooling facility according to the present invention, all of the reactor auxiliaries can be cooled down even when the function of the heat exchanger to dissipate the heat of the cooling water to the seawater is lost.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a plant auxiliary cooling facility according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a plant auxiliary cooling facility according to a second or third embodiment of the present invention; and
FIG. 3 is a block diagram of a plant auxiliary cooling facility according to a fourth or fifth embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
Hereinafter, embodiments of the present invention will be described with reference to accompanying drawings. In the drawings, the same elements are denoted with the same reference numerals, and redundant descriptions thereof will be omitted. First Embodiment
FIG. 1 is a block diagram of a plant auxiliary cooling facility according to a first embodiment of the present invention.
In FIG. 1, a plant auxiliary cooling facility 20 cools down reactor auxiliaries 3a to 3c by circulating water in a closed loop cooling system 2 (hereinafter, referred to as cooling water) via a circulation pump 1 (first circulation pump) and dissipating heat of the cooling water that has passed through the reactor auxiliaries 3a to 3c to seawater that passes in a heat exchanger 4.
A surge tank 5 for giving a hydrostatic head to the circulation pump 1 is provided upstream of the circulation pump 1 of the closed loop cooling system 2. A pressure gauge 6 for detecting a discharge pressure of the circulation pump 1 is provided downstream of the circulation pump 1 of the closed loop cooling system 2 and suspension (failure) of the circulation pump 1 can be detected based on the discharge pressure of the circulation pump 1 detected by the pressure gauge 6.
The seawater stored in an intake pit 8 is sent to the heat exchanger 4 by a water feed pump 7, and the seawater discharged from the heat exchanger 4 returns to the sea. When a water level of the intake pit 8 is below a level at which the water feed pump 7 can suck up water, feeding of water from the water feed pump 7 to the heat exchanger 4 is stopped, and the heat exchanger 4 loses the function thereof. Thus, a water level gauge 9 for monitoring the water level of seawater is provided in the intake pit 8 . The means that the function of the heat exchanger 4 is lost is not limited thereto, but may be detected based on a decrease in an outlet pressure of the water feed pump 7 and an increase in an outlet temperature of the heat exchanger 4 in the closed loop cooling system 2.
An end of a branch pipe 10a (first branch pipe) is connected to a point in the downstream of the circulation pump 1, and in the upstream of the heat exchanger 4 in the closed loop cooling system 2, and the other end of the branch pipe 10a is connected to an inlet of a cooling tower 11. An end of a branch pipe 10b (first branch pipe) is connected to a point in the downstream of the heat exchanger 4 and in the upstream of the reactor auxiliaries 3a to 3c in the closed loop cooling system 2, and the other end of the branch pipe 10b is connected to an outlet of the cooling tower 11.
A switching valve 12a (first switching valve) capable of switching between connection and disconnection of the branch pipe 10a is provided on the branch pipe 10a. A switching valve 12b (first switching valve) capable of switching between connection and disconnection of the circulation pump 1 and the heat exchanger 4 of the closed loop cooling system 2 is provided upstream of the heat exchanger 4 of the closed loop cooling system 2, which is downstream of the branch pipe 10a.
The plant auxiliary cooling facility 20 further includes a control circuit 13 (first control circuit) that controls switching of the switching valves 12a and 12b, and start/stop of the cooling tower 11. The control circuit 13 determines whether the heat exchanger 4 is functioning or not based on the water level of the intake pit 8 measured by the water level gauge 9. When it is determined that the heat exchanger 4 is functioning, the switching valve 12a is closed, the switching valve 12b is open, and the cooling tower 11 does not start to operate. On the other hand, when it is determined that the heat exchanger 4 is not functioning, the switching valve 12a is open, the switching valve 12b is closed, and the cooling tower 11 starts to operate. However the control circuit 13 is not necessarily provided, instead an operator may manually open the switching valve 12a and close the switching valve 12b to start the operation of the cooling tower 11 in accordance with the water level of the intake pit 8 detected by the water level gauge 9.
According to this operation, when the heat exchanger 4 loses the function thereof, the cooling water that has passed through the reactor auxiliaries 3a and 3c is sent to the cooling tower 11 by the circulation pump 1 and is circulated within the closed loop cooling system 2 without passing through the heat exchanger 4.
The plant auxiliary cooling facility 20 according to the present embodiment includes the heat exchanger 4, the water feed pump 7 for feeding seawater to the heat exchanger 4, the closed loop cooling system 2 for circulating the cooling water between the reactor auxiliaries 3a to 3c of the nuclear power plant and the heat exchanger 4, the first circulation pump 1 provided on the closed loop cooling system 2, the surge tank 5 for giving the hydrostatic head to the first circulation pump 1, the first branch pipes 10a and 10b for connecting the point in the downstream of the first circulation pump 1 and in the upstream of the heat exchanger 4 in the closed loop cooling system 2, with the point in the downstream of the heat exchanger 4 and in the upstream of the reactor auxiliaries 3a to 3c in the closed loop cooling system 2, the cooling tower 11 provided on the first branch pipes 10a and 10b, and the first switching valves 12a and 12b capable of switching the destination of the cooling water discharged from the first circulation pump 1 from the heat exchanger 4 to the cooling tower 11.
According to the present embodiment having the above configuration, even when the function of the heat exchanger 4 is lost, the cooling tower 11 substitutes for the function of the heat exchanger 4, and thus, all of the reactor auxiliaries 3a to 3c can be cooled down.
In addition, the plant auxiliary cooling facility 20 according to the present embodiment further includes the first control circuit 13 that detects stoppage of the function of the heat exchanger 4 and switches the first switching valves 12a and 12b so that the destination of the cooling water discharged from the first circulation pump 1 is switched from the heat exchanger 4 to the cooling tower 11 to start the operation of the cooling tower 11. Accordingly, after the function of the heat exchanger 4 is lost, the cooling tower 11 can rapidly substitute for the function the heat exchanger 4 .
Second Embodiment
FIG. 2 is a block diagram of a plant auxiliary cooling facility according to a second embodiment of the present invention. Hereinafter, elements that are different from those of the first embodiment (shown in FIG. 1) will be described below.
In FIG. 2, a plant auxiliary cooling facility 20A further includes an additional circulation pump 14 (second circulation pump), a switching valve 15 (second switching valve), and a control circuit 16 (second control circuit).
An suction port of the additional circulation pump 14 is connected to the point in the downstream of the surge tank 5 and in the upstream of the circulation pump 1 in the closed loop cooling system 2 via a branch pipe 17a (second branch pipe) A discharge port of the additional circulation pump 14 is connected to the point in the upstream of the switching valve 12a of the branch pipe 10a (or in the point in the downstream of the circulation pump 1 and in the upstream of the branch pipe 10a in the closed loop cooling system 2) via a branch pipe 17b (second branch pipe) . The switching valve 15 capable of switching between connection and disconnection of the branch pipe 17a is provided on the branch pipe 17a.
The control circuit 16 detects stoppage (failure) of the circulation pump 1 based on a discharge pressure of the circulation pump 1 detected by the pressure gauge 6. When the failure of the circulation pump 1 is detected, the control circuit 16 opens the switching valve 15 and starts the operation of the additional circulation pump 14. However the control circuit 16 is not necessarily provided, instead an operator may manually open the switching valve 15 to start the operation of the additional circulation pump 14 in accordance with the discharge pressure of the circulation pump 1 detected by the pressure gauge 6.
In this configuration, the control circuit 16 opens the switching valve 15 and starts the operation of the additional circulation pump 14 when the circulation pump 1 breaks in a state where the function of the heat exchanger 4 is lost (a state where the switching valve 12b is closed and the switching valve 12a is open).
According to this operation, when the circulation pump 1 breaks in a state where the function of the heat exchanger 4 is lost, the cooling water that has passed through the reactor auxiliaries 3a and 3c is sent to the cooling tower 11 by the additional circulation pump 14 and circulates within the closed loop cooling system 2 without passing through the circulation pump 1 and the heat exchanger 4.
The plant auxiliary cooling facility 20A according to the present embodiment further includes the second branch pipes 17a and 17b for connecting the point in the downstream of the reactor auxiliaries 3a to 3c and in the upstream of the first circulation pump 1 in the closed loop cooling system 2, with the point in the upstream of the first switching valve 12a of the first branch pipe 10a or in the downstream of the first circulation pump 1 and in the upstream of the first branch pipe 10a in the closed loop cooling system 2, the second circulation pump 14 provided on the second branch pipes 17a and 17b, and the second switching valve 15 provided upstream of the second circulation pump 14 of the second branch pipes 17a and 17b to be capable of switching between connection and disconnection of the second branch pipes 17a and 17b.
According to the present embodiment having the above configuration, even when the first circulation pump 1 breaks in a state where the cooling tower 11 substitutes for the function of the heat exchanger 4, the second circulation pump 14 substitutes for the first circulation pump 1, and accordingly, all of the reactor auxiliaries 3a to 3c can be cooled down.
The plant auxiliary cooling facility 20A according to the present embodiment includes the second control circuit 16 that detects the failure of the first circulation pump 1 and switches the second switching valve 15 so that the second branch pipes 17a and 17b communicate with each other to start the operation of the second circulation pump 14. Accordingly, after the first circulation pump 1 stops operating, the function of the first circulation pump 1 can be rapidly replaced with the second circulation pump 14.
Third Embodiment
A plant auxiliary cooling facility according to a third embodiment of the present invention will be described focusing on differences from the first embodiment.
The plant auxiliary cooling facility according to the present embodiment has a configuration that is the same as that of the second embodiment (shown in FIG. 2).
In FIG. 2, in the plant auxiliary cooling facility 20A according to the present embodiment, when the circulation pump 1 breaks in a state where the heat exchanger 4 is functioning (the switching valve 12a is closed and the switching valve 12b is open) , the switching valve 15 of the branch pipe 17a is open and the additional circulation pump 14 starts to operate.
According to this operation, when the circulation pump 1 breaks in a state where the heat exchanger 4 is functioning, the cooling water that has passed through the reactor auxiliaries 3a and 3c is sent to the heat exchanger 4 by the additional circulation pump 14 and circulates within the closed loop cooling system 2 without passing through the circulation pump 1 and the cooling tower 11.
According to the present embodiment having the above configuration, even when the first circulation pump 1 breaks in a state where the heat exchanger 4 is functioning, the second circulation pump 14 substitutes for the function of the first circulation pump 1, and accordingly, all of the reactor auxiliaries 3a to 3c can be cooled down.
Fourth Embodiment
FIG. 3 is a block diagram of a plant auxiliary cooling facility according to a fourth embodiment of the present invention. Hereinafter, differences from the third embodiment (shown in FIG. 2) will be described below.
In FIG. 3, a plant auxiliary cooling facility 20B does not include the additional circulation pump 14 (second circulation pump) and the control circuit 16 (second control circuit) . In addition, a connection port 18a for connecting to an suction port of a portable pump is provided at a downstream end of the branch pipe 17a, and the connection port 18b for connecting to a discharge port of the portable pump is provided at an upstream end of the branch pipe 17b.
In this configuration, when the circulation pump 1 breaks in a state where the function of the heat exchanger 4 is lost (a state in which the switching valve 12b is closed and the switching valve 12a is open) , the suction port of the additional circulation pump 14 which is a portable pump is connected to the connection port 18a of the branch pipe 17a, and the discharge port of the additional circulation pump 14 is connected to the connection port 18b of the branch pipe 17b, while the switching valve 15 of the branch pipe 17a closed. When the installation of the additional circulation pump 14 is finished, the switching valve 15 of the branch pipe 17a is open and the additional circulation pump 14 starts to operate.
According to this operation, when the circulation pump 1 breaks in a state where the function of the heat exchanger 4 is lost, the cooling water that has passed through the reactor auxiliaries 3a and 3c is sent to the cooling tower 11 by the additional circulation pump 14 and circulates within the closed loop cooling system 2 without passing through the circulation pump 1 and the heat exchanger 4.
The plant auxiliary cooling facility 20B according to the present embodiment further includes the second branch pipes 17a and 17b for connecting the point in the downstream of the reactor auxiliaries 3a to 3c and in the upstream of the first circulation pump 1 in the closed loop cooling system 2 with the point in the upstream of the first switching valve 12a of the first branch pipe 10a or the point in the downstream of the first circulation pump 1 and in the upstream of the first branch pipe 10a in the closed loop cooling system 2, the connection ports 18a and 18b provided on the second branch pipes 17a and 17b for connecting the second circulation pump 14 configured with the portable pump to the second branch pipes 17a and lib, and the second switching valve 15 provided upstream of the connection ports 18a and 18b of the second branch pipes 17a and lib and capable of switching between connection and disconnection of the second branch pipes lia and lib.
According to the present embodiment having the above configuration, even when the first circulation pump 1 breaks in a state where the cooling tower 11 substitutes for the function of the heat exchanger 4, the second circulation pump 14 which is a portable pump is installed on the second branch pipes lia and lib and the second circulation pump 14 substitutes for the function of the first circulation pump 1, and accordingly, all of the reactor auxiliaries 3a and 3c can be cooled down.
Fifth Embodiment
A plant auxiliary cooling facility according to a fifth embodiment of the present invention will be described focusing on differences from the fourth embodiment.
The plant auxiliary cooling facility according to the present embodiment has a configuration that is the same as that of the fourth embodiment (shown in FIG. 3).
In FIG. 3, in the plant auxiliary cooling facility 20B according to the present embodiment, when the first circulation pump 1 breaks in a state where the heat exchanger 4 is functioning (a state where the switching valve 12a is closed and the switching valve 12b is open), the suction port of the additional circulation pump 14 which is a portable pump is connected to the connection port 18a of the branch pipe 17a and the discharge port of the additional circulation pump 14 is connected to the connection port 18b of the branch pipe 17b while the switching valve 15 of the branch pipe 17a closed. When the installation of the additional circulation pump 14 is finished, the switching valve 15 is open and the additional circulation pump 14 starts to operate.
According to this operation, when the circulation pump 1 breaks in a state where the heat exchanger 4 is functioning, the cooling water that has passed through the reactor auxiliaries 3a and 3c is sent to the heat exchanger 4 by the additional circulation pump 14 and circulates within the closed loop cooling system 2 without passing through the circulation pump 1 and the cooling tower 11.
According to the present embodiment having the above configuration, even when the circulation pump 1 breaks in a state where the heat exchanger 4 is functioning, the second circulation pump 14 which is a portable pump is installed on the second branch pipes 17a and 17b and the second circulation pump 14 substitutes for the function of the first circulation pump 1, and accordingly, all of the reactor auxiliaries 3a and 3c can be cooled down.
The embodiments of the present invention have been described above in detail. However, the present invention is not limited to the above embodiments, but various modified examples are included in the present invention. For example, the above embodiments are described in detail to make the present invention easy to understand and the present invention is not limited to embodiments necessarily provided with all the described configuration elements. In addition, it is also possible to add a part of the configuration of another embodiment to the configuration of an embodiment, and the configuration of an embodiment may be partially removed or may be partially replaced with a part of another embodiment.
Claims (5)
1. A plant auxiliary cooling facility comprising:
a heat exchanger;
a water feed pump for feeding seawater to the heat exchanger;
a closed loop cooling system for circulating cooling water between reactor auxiliaries of the nuclear power plant and the heat exchanger;
a first circulation pump provided on the closed loop cooling system;
a surge tank for giving a hydrostatic head to the first circulation pump;
a first branch pipe for connecting a point in the downstream of the first circulation pump and in the upstream of the heat exchanger in the closed loop cooling system, with a point in the downstream of the heat exchanger and in the upstream of the reactor auxiliaries in the closed loop cooling system;
a cooling tower provided on the first branch pipe; and first switching valves for switching the destination of the cooling water discharged from the first circulation pump from the heat exchanger to the cooling tower.
2. The plant auxiliary cooling facility of claim 1, further comprising a first control circuit for detecting stoppage of the function of the heat exchanger, switching the first switching valve so that the destination of the cooling water discharged from the first circulation pump is switched from the heat exchanger to the cooling tower, and starting the operation of the cooling tower.
3. The plant auxiliary cooling facility of claim 1, further comprising:
second branch pipes for connecting a point in the downstream of the reactor auxiliaries and in the upstream of the first circulation pump in the closed loop cooling system, with a point in the upstream of the first switching valve of the first branch pipe or a point in the downstream of the first circulation pump and in the upstream of the first branch pipe in the closed loop cooling system;
a second circulation pump provided on the second branch pipes; and a second switching valve provided on upstream of the second circulation pump of the second branch pipes and capable of switching between connection and disconnection of the second branch pipes.
4. The plant auxiliary cooling facility of claim 3, further comprising a second control circuit for detecting the failure of the first circulation pump, switching the second switching valve so that the second branch pipes are connected to each other, and starting the operation of the second circulation pump .
5. The plant auxiliary cooling facility of claim 1, further comprising:
second branch pipes for connecting a point in the downstream of the reactor auxiliaries and in the upstream of the first circulation pump in the closed loop cooling system, with a point in the upstream of the first switching valve of the first branch pipe or a point in the downstream of the first circulation pump and in the upstream of the first branch pipe in the closed loop cooling system;
connection ports provided on the second branch pipes for connecting the second circulation pump which is a portable pump to the second branch pipes; and a second switching valve provided upstream of the connection ports of the second branch pipes, and capable of switching between connection and disconnection of the second branch pipes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018135657A JP6941081B2 (en) | 2018-07-19 | 2018-07-19 | Auxiliary cooling equipment for nuclear power plants |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201909579D0 GB201909579D0 (en) | 2019-08-14 |
| GB2576253A true GB2576253A (en) | 2020-02-12 |
| GB2576253B GB2576253B (en) | 2020-09-16 |
Family
ID=67540074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1909579.3A Active GB2576253B (en) | 2018-07-19 | 2019-07-03 | Plant auxiliary cooling facility |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6941081B2 (en) |
| GB (1) | GB2576253B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5657360A (en) * | 1994-09-19 | 1997-08-12 | Kabushiki Kaisha Toshiba | Reactor container |
| CN109830316A (en) * | 2019-02-22 | 2019-05-31 | 华北电力大学 | A kind of passive accident afterheat discharge system of sodium-cooled fast reactor intermediate loop |
| GB2574299A (en) * | 2018-03-30 | 2019-12-04 | Hitachi Ge Nuclear Energy Ltd | Sea water cooling system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2927418A1 (en) * | 1979-07-06 | 1981-01-15 | Kraftwerk Union Ag | COOLING DEVICE FOR AUXILIARY SYSTEMS OF A NUCLEAR SYSTEM |
| JPS61178697A (en) * | 1985-02-05 | 1986-08-11 | 株式会社東芝 | Nuclear-reactor auxiliary machine cooling facility |
| JPH1130685A (en) * | 1997-07-11 | 1999-02-02 | Toshiba Corp | Emergency core cooling system for nuclear reactor |
| JP2002257972A (en) * | 2001-03-01 | 2002-09-11 | Hitachi Ltd | Method and system for operating nuclear reactor auxiliary machine cooling system |
| JP6271158B2 (en) * | 2013-05-30 | 2018-01-31 | 日立Ｇｅニュークリア・エナジー株式会社 | Reactor auxiliary equipment cooling equipment |
| JP2016176767A (en) * | 2015-03-19 | 2016-10-06 | 株式会社東芝 | Nuclear plant portable type cooling apparatus and portable type cooling method |
-
2018
- 2018-07-19 JP JP2018135657A patent/JP6941081B2/en active Active
-
2019
- 2019-07-03 GB GB1909579.3A patent/GB2576253B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5657360A (en) * | 1994-09-19 | 1997-08-12 | Kabushiki Kaisha Toshiba | Reactor container |
| GB2574299A (en) * | 2018-03-30 | 2019-12-04 | Hitachi Ge Nuclear Energy Ltd | Sea water cooling system |
| CN109830316A (en) * | 2019-02-22 | 2019-05-31 | 华北电力大学 | A kind of passive accident afterheat discharge system of sodium-cooled fast reactor intermediate loop |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201909579D0 (en) | 2019-08-14 |
| JP6941081B2 (en) | 2021-09-29 |
| JP2020012749A (en) | 2020-01-23 |
| GB2576253B (en) | 2020-09-16 |
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