CN207541957U - A kind of reactor core flood pattern - Google Patents
A kind of reactor core flood pattern Download PDFInfo
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- CN207541957U CN207541957U CN201721350749.4U CN201721350749U CN207541957U CN 207541957 U CN207541957 U CN 207541957U CN 201721350749 U CN201721350749 U CN 201721350749U CN 207541957 U CN207541957 U CN 207541957U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to npp safety protection technique field, more particularly to a kind of reactor core flood pattern, connect the reactor coolant loop in containment, including being provided with cold leg (12) in the reactor coolant loop, it is directly injected into the reactor pressure vessel (14) of pipeline (13), further include the high pressure gas storage case (1) being connected by the first pipeline (9) being arranged in containment and cooling boron water tank (2), the second pipeline (10) of connection cold leg (12) is additionally provided on cooling boron water tank (2) and connection is directly injected into the third pipeline (11) of pipeline (13), first pipeline (9), second pipeline (10), a motor-driven valve and a check-valves are arranged in series on third pipeline (11) respectively.The reactor core flood pattern can merge traditional safety injection tank and passive Core makeup tank, can play the function of safety injection tank, can also become the spare of High-pressure injection system in the form of passive Core makeup tank.
Description
Technical field
The utility model belongs to npp safety protection technique field, and in particular to a kind of reactor core flood pattern.
Background technology
Very important one is exactly safety injection system in PWR nuclear power plant engineered safeguards features.Occurring to design base
During quasi- accident, traditional active high-pressure safety injection starts automatically after signal is connected to, and injects boron water to reactor coolant loop；
When the pressure of reactor coolant loop is dropped to below safety injection tank pressure, boron water in safety injection tank under nitrogen pressure effect from
Dynamic injection, cooling water source is provided for reactor core.
The safety injection system design of generation Ⅲ nuclear power unit AP1000 employs passive Core makeup tank, plays and traditional
The similar function of active high-pressure safety injection.Its entrance is directly injected into pipe phase with primary Ioops cold leg and pressure vessel respectively with outlet
Even, it can work under water circulation model and steam compensation model.
Chinese utility model patent (application number 201220509622.3, notification number CN202887751U) discloses a kind of energy
It moves with the passive reactor core water filling heat derivation device being combined, safety injection system and Core makeup tank is integrated, that is, include biography
The active safety injection pump of system and safety injection tank, the passive Core makeup tank for also including AP1000.
Utility model content
The purpose of this utility model is with relatively simple method, merges traditional safety injection tank and passive reactor core moisturizing
Case so that one case dual-purpose, can play the function of safety injection tank, can also become high-pressure safety injection in the form of passive Core makeup tank
System it is spare.
To achieve the above objectives, the technical solution adopted in the utility model is：
A kind of reactor core flood pattern connects the reactor coolant loop in containment, including the reactor coolant
The reactor pressure vessel for being provided with cold leg, being directly injected into pipeline in system, further includes and is arranged in the containment
It is described cold that connection is additionally provided with by the high pressure gas storage case that the first pipeline is connected and cooling boron water tank, on the cooling boron water tank
The third pipeline of pipeline, first pipeline, the second pipeline, third pipeline are directly injected into described in second pipeline of pipeline section and connection
It is upper to be arranged in series a motor-driven valve and a check-valves respectively.
Further, the cooling boron water tank is sealing structure, for storing first cooling water, the cooling boron water tank
Level height higher than the level height for being directly injected into pipeline.
Further, one end of first pipeline is sealedly connected on the top of the cooling boron water tank, and other end sealing connects
Connect the high pressure gas storage case；What is be arranged in series on first pipeline is the first motor-driven valve and first check-valve, described
Media flow direction in one check-valves is by the high pressure gas storage case to the cooling boron water tank.
Further, one end of second pipeline is sealedly connected on the top of the cooling boron water tank, less than the cooling
The position at the top of boron water tank, the other end are tightly connected the cold leg；What is be arranged in series on second pipeline is the second electricity
Dynamic valve and second check-valve, the media flow direction in the second check-valve is by the cold leg to the cooling boron water
Case.
Further, one end of the third pipeline is tightly connected the bottom of the cooling boron water tank, and the other end is tightly connected
It is described to be directly injected into pipeline；What is be arranged in series on the third pipeline is third motor-driven valve and third check-valves, and the third is stopped
The media flow direction returned in valve is to be directly injected into pipeline to described by the cooling boron water tank.
Further, when second motor-driven valve, third motor-driven valve be in opening, in the cold leg it is cold full of second
But during water, second cooling water can enter the cooling boron water tank, while the cooling through the cold leg, the second pipeline
First cooling water in boron water tank can pass through the third pipeline, be directly injected into pipeline into reactor pressure appearance
Device, the compensation reactor coolant loop water loading amount；Second cooling water comes from the cold leg.
Further, when second motor-driven valve, third motor-driven valve be in opening, in the cold leg full of steam
When, the steam can enter the cooling boron water tank through the cold leg, the second pipeline, while in the cooling boron water tank
First cooling water can pass through the third pipeline, be directly injected into pipeline into the reactor pressure vessel；It is described
Steam comes from the cold leg.
Further, when first motor-driven valve, third motor-driven valve are in opening, the institute in the cooling boron water tank
State the first cooling water can it is quick under the action of the high pressure gas in the high pressure gas storage case, largely by described the
Three pipelines are directly injected into pipeline into the reactor pressure vessel.
Further, the high pressure gas stored in the high pressure gas storage case is high pressure nitrogen, the high pressure gas
The pressure of the high pressure gas in storage bin is 4.2MPa.
Further, first cooling water in the cooling boron water tank is boracic cooling water.
The beneficial effects of the utility model have the following：
1. by cool down boron water tank 2 and high pressure gas storage case 1, cold leg 12, the connection for being directly injected into pipeline 13 and
The setting of first motor-driven valve 3, the second motor-driven valve 4, third motor-driven valve 5 so that cooling boron water tank 2 can play the work of safety injection tank
With providing quick, a large amount of cooling water function of injection with safety injection tank pattern, provided after large-break LOCA occurs for reactor core
The cooling water of high flow capacity in short-term；The effect of Core makeup tank can be realized again, pacified with passive circulation pattern as active high pressure
Injection system it is spare, one case is dual-purpose, saves space valuable in containment；
2. on the basis of multi-system equipment was not increased traditional safety injection system, passive Core makeup tank system is merged
System, increases the redundancy of High-pressure injection system, and as High-pressure injection system it is spare when, being embodied as function is passive
, enhance the safety of nuclear power plant；
3. be used as High-pressure injection system spare, the Core cooling water source of redundancy for design basis accident can be provided, carried
While high npp safety, more plenty of time is provided for operator's subsequent action, is conducive to reduce people because failing generally
Rate；
4. the utility model can be used for a variety of PWR nuclear power plants, applicability and the generalizations such as two loops, Three links theory stronger.
Description of the drawings
Fig. 1 is reactor core flood pattern described in specific embodiment of the present invention in the first pressure pattern (non-energy
Dynamic circulation pattern) under operating diagram；
Fig. 2 is that the reactor core flood pattern described in specific embodiment of the present invention (pacifies note in second of pressure pattern
Box mode) under operating diagram；
In figure：1- high pressure gas storage casees, 2- cooling boron water tanks, the first motor-driven valves of 3-, the second motor-driven valves of 4-, 5- thirds electricity
Dynamic valve, 6- first check-valves, 7- second check-valves, 8- third check-valves, the first pipelines of 9-, the second pipelines of 10-, 11- third pipes
Line, 12- cold legs, 13- are directly injected into pipeline, 14- reactor pressure vessels.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in Figure 1 and Figure 2, a kind of reactor core flood pattern, is arranged in the containment of nuclear power plant's reactor, including high pressure
Gas storage tanks 1, cooling boron water tank 2, the first motor-driven valve 3, the second motor-driven valve 4, third motor-driven valve 5, first check-valve 6, second
Check-valves 7, third check-valves 8, the first pipeline 9, the second pipeline 10, third pipeline 11, cold leg 12, be directly injected into pipeline 13,
Reactor pressure vessel 14 etc..
Reactor core flood pattern coupled reaction reactor coolant system provided by the utility model, it is cold in reactor core flood pattern
Pipeline section 12 is directly injected into pipeline 13, reactor pressure vessel 14 (being respectively positioned in containment) while also serves as reactor coolant
A part for system；Reactor core flood pattern provided by the utility model is used in accident two kinds of pressure patterns of offer
Cooling water arbitrary way is that (water circulation model and steam follow with the passive circulation pattern of reactor coolant loop progress respectively
Ring mode is using for reactor coolant loop cooling, moisturizing) and use safety injection tank pattern fast as reactor coolant loop
Speed largely provides cooling water.
The cooling boron water tank 2 of reactor core flood pattern provided by the utility model is sealing structure, cold for storing first
But water, it is boracic cooling water to cool down the first cooling water in boron water tank 2.The level height for cooling down boron water tank 2 is cold higher than reactor
But the level height for being directly injected into pipeline 13 of agent system, so that the boracic cooling water cooled down in boron water tank 2 can rely on gravity
Effect from cooling boron water tank 2 inflow be directly injected into pipeline 13, provide cooling for reactor coolant loop.
The high pressure gas stored in high pressure gas storage case 1 is high pressure nitrogen, the high pressure gas in high pressure gas storage case 1
Pressure be 4.2MPa.
High pressure gas storage case 1 is connected with cooling boron water tank 2 by the first pipeline 9, and the cold pipe of connection is additionally provided on boron water tank 2
Second pipeline 10 of section 12 and connecting is directly injected into the third pipeline 11 of pipeline 13, and (cold leg 12 is not connect with the second pipeline 10
One end and be directly injected into one end not connect with third pipeline 11 of pipeline 13 and be both connected to reactor pressure vessel 14
On), the first pipeline 9, the second pipeline 10 are arranged in series a motor-driven valve and a check-valves on third pipeline 11 respectively.
Wherein, one end of the first pipeline 9 and the top of cooling boron water tank 2 are tightly connected, the other end and the height of the first pipeline 9
Pressure gas storage tanks 1 are tightly connected；The motor-driven valve and check-valves being arranged in series on first pipeline 9 are 3 (the first electricity of the first motor-driven valve
Dynamic valve 3 is normally open for being pressurized) and first check-valve 6, the media flow direction in first check-valve 6 is by high pressure gas
Body storage bin 1 to cooling boron water tank 2.Wherein the first motor-driven valve 3 is close to high pressure gas storage case 1, and first check-valve 6 is close to cooling
Boron water tank 2.
One end of second pipeline 10 is connect with the top seal of cooling boron water tank 2 and position is less than the top for cooling down boron water tank 2
The position (position namely being connect less than the first pipeline 9 with cooling down the top of boron water tank 2) in portion, the other end of the second pipeline 10
It is tightly connected with cold leg 12；The motor-driven valve and check-valves being arranged in series on second pipeline 10 are the second motor-driven valves 4 (for normally opened shape
State) and second check-valve 7, the media flow direction in second check-valve 7 is by cold leg 12 to cooling boron water tank 2.Wherein
Two motor-driven valves 4 are close to cooling boron water tank 2, and second check-valve 7 is close to cold leg 12.
One end of third pipeline 11 connect with cooling down the sealed bottom of boron water tank 2, the other end of third pipeline 11 with it is direct
Injection pipeline 13 is tightly connected；The motor-driven valve and check-valves being arranged in series on third pipeline 11 are that (third is electronic for third motor-driven valve 5
Valve 5 is for being isolated) and third check-valves 8, the media flow direction in third check-valves 8 is to directly noting by cooling boron water tank 2
Enter pipeline 13.Wherein for third motor-driven valve 5 close to cooling boron water tank 2, third check-valves 8 is close to be directly injected into pipeline 13.
As shown in Figure 1, reactor core flood pattern provided by the utility model and reactor coolant loop progress are passive
Circulation pattern is further divided into two ways：
1) water circulation models:
When the second motor-driven valve 4, third motor-driven valve 5 are in opening, cold leg 12 full of the second cooling water, reaction
The second cooling water in core pressure vessel 14 can enter cooling boron water tank 2, while cool down boron through cold leg 12, the second pipeline 10
The first cooling water (boracic cooling water) in water tank 2 can pass through third pipeline 11, be directly injected into pipeline 13 into reaction stacking pressure
In reactor coolant loop in force container 14.Using this pattern, reactor coolant loop boronation can be made and increased
Cooling water loading amount.
2) steam circulations pattern:
When the second motor-driven valve 4, third motor-driven valve 5 are in opening, cold leg 12 full of steam, reactor pressure
Steam in container 14 can enter cooling boron water tank 2 through cold leg 12, the second pipeline 10, at the same cool down in boron water tank 2 the
One cooling water can pass through third pipeline 11, be directly injected into pipeline 13 into reactor pressure vessel 14, the cooling of compensatory reactionBu Changfanying heap
Agent system water loading amount.
As shown in Fig. 2, reactor core flood pattern provided by the utility model uses safety injection tank pattern as reactor coolant
The mode of quick, a large amount of offer cooling water of system：
When reactor coolant loop pressure be less than 4.2MPa when, third motor-driven valve 5 be in opening when, due to first
Motor-driven valve 3 is normally opened, and the first cooling water in cooling boron water tank 2 can be in the effect of the high pressure gas in high pressure gas storage case 1
It is lower quickly, largely to pass through third pipeline 11, be directly injected into the reactor cooling that pipeline 13 enters in reactor pressure vessel 14
In agent system.
Finally illustrate the practical application of reactor core flood pattern provided by the utility model
Under normal operating conditions, cooling boron water tank 2, being each filled with the first cooling water inside third pipeline 11, (boracic cools down
Water), the first motor-driven valve 3, the second motor-driven valve 4 are opening, and third motor-driven valve 5 is in off state.
After accident occurs, when receiving safe trigger signal --- such as voltage-stablizer pressure is low or containment pressure height letter
After number, third motor-driven valve 5 is opened, and releasing is isolated between cooling boron water tank 2 and cold leg 12.At this moment, due to cooling down boron water tank
2nd, the second pipeline 10, inside third pipeline 11 be the full water (normal operation when third motor-driven valve 5 is not turned on
Under, it is also full water in the second pipeline 10).In this way, the hot water (the second cooling water) from cold leg 12 passes through the second pipeline 10
Cooling boron water tank 2 is entered, cools down cold water (the first cooling water) piii reactor coolant system in boron water tank 2, so that it may make
Reactor coolant loop boronation and the loading amount for increasing its cooling water.Here it is the first subdivision sides in passive circulation pattern
Formula --- water circulation model.
Boron water tank 2 is cooled down when steam is entered by the second pipeline 10, then is steam mode.When the second motor-driven valve 4, third electricity
When dynamic valve 5 is in opening, cold leg 12 full of steam, in the reactor coolant loop in reactor pressure vessel 14
Steam can enter cooling boron water tank 2, while cool down the first cooling water in boron water tank 2 through cold leg 12, the second pipeline 10
It can pass through in third pipeline 11, the reactor coolant loop being directly injected into the entrance reactor pressure vessel 14 of pipeline 13,
Here it is second of subdivision mode --- steam modes in passive circulation pattern.
The operational mode of cooling boron water tank 2 depends primarily on whether cold leg 12 empties, and (comes after cold leg 12 is full of water
Second cooling water of the high temperature of autothermal reactor coolant system), then peace note (to reactor core water filling) is carried out with water circulation model；Such as
Fruit reactor coolant loop water loading amount is reduced so that cold leg 12 empties, then steam enters cooling boron water tank by cold leg 12
2, start steam circulation pattern.Water circulation model and steam circulation pattern can as active High-pressure injection system it is spare, be anti-
Heap is answered to provide passive cooling water source.
When reactor coolant loop pressure is further lowered into below 4.2MPa after accident, the utility model is provided
Reactor core flood pattern enter second of pressure pattern --- safety injection tank pattern, schematic diagram such as Fig. 2.The pattern is simulation tradition
Passive SIT, guarantee safety injection tank function in nuclear power plant.(large break dehydration thing after large-break LOCA occurs for nuclear power plant
Therefore refer to reactor coolant loop main pipeline occur Major disruptionL and caused by reactor coolant lose accident), need by pacifying
Note case quickly provides cooling water source.At this moment the high pressure nitrogen of 4.2MPa is squeezed into cooling boron water tank 2 by high pressure gas storage case 1, cold
But boron water tank 2 can provide the peace water filling of big flow to reactor pressure vessel 14.Because the first motor-driven valve 3 is normally opened, high pressure
The high pressure nitrogen of 1 the inside of gas storage tanks can be automatically injected in cooling boron water tank 2 (has the second non-return beside the second motor-driven valve 4
Valve 7, so high pressure nitrogen will not be injected into the second pipeline 10), boron water tank 2 is cooled down at this time becomes safety injection tank, it can be achieved that peace note
Box function.
Cooling down 2 bottom of boron water tank can with being directly injected into the third motor-driven valve 5 set on the third pipeline 11 that pipeline 13 is connect
It is closed after cooling boron water tank 2 empties, nitrogen is avoided to inject reactor core (in reactor pressure vessel 14).
The improvement that the utility model only describes safety injection system on one loop of presurized water reactor (is only provided on a loop
Reactor core flood pattern provided by the utility model), three symmetrical reactor core water fillings can be set for the nuclear power plant of Three links theory
System.
Device described in the utility model is not limited to the embodiment described in specific embodiment, those skilled in the art
Technical solution according to the present utility model obtains other embodiments, also belongs to the technological innovation scope of the utility model.
Claims (10)
1. a kind of reactor core flood pattern connects the reactor coolant loop in containment, it is characterized in that：Including the reactor
The reactor pressure vessel (14) for being provided with cold leg (12), being directly injected into pipeline (13) in coolant system, further includes and sets
The high pressure gas storage case (1) being connected by the first pipeline (9) and cooling boron water tank (2) in the containment are put, it is described
It is additionally provided on cooling boron water tank (2) described in the second pipeline (10) for connecting the cold leg (12) and connection and is directly injected into pipeline
(13) third pipeline (11), first pipeline (9), the second pipeline (10), third pipeline are arranged in series one respectively on (11)
A motor-driven valve and a check-valves.
2. reactor core flood pattern as described in claim 1, it is characterized in that：The cooling boron water tank (2) is sealing structure, is used for
The first cooling water is stored, the level height of the cooling boron water tank (2) is higher than the level height for being directly injected into pipeline (13).
3. reactor core flood pattern as claimed in claim 2, it is characterized in that：One end of first pipeline (9) is sealedly connected on
The top of the cooling boron water tank (2), the other end are tightly connected the high pressure gas storage case (1)；On first pipeline (9)
What is be arranged in series is the first motor-driven valve (3) and first check-valve (6), and the media flow direction in the first check-valve (6) is
By the high pressure gas storage case (1) to the cooling boron water tank (2).
4. reactor core flood pattern as claimed in claim 3, it is characterized in that：One end of second pipeline (10) is sealedly connected on
It is described cooling boron water tank (2) top, less than it is described cooling boron water tank (2) top position, the other end be tightly connected described in
Cold leg (12)；What is be arranged in series on second pipeline (10) is the second motor-driven valve (4) and second check-valve (7), described
Media flow direction in two check-valves (7) is by the cold leg (12) to the cooling boron water tank (2).
5. reactor core flood pattern as claimed in claim 4, it is characterized in that：One end of the third pipeline (11) is tightly connected institute
The bottom of cooling boron water tank (2) is stated, pipeline (13) is directly injected into described in other end sealed connection；It is gone here and there on the third pipeline (11)
Connection is provided that third motor-driven valve (5) and third check-valves (8), the media flow direction in the third check-valves (8) be by
The cooling boron water tank (2) is directly injected into pipeline (13) to described.
6. reactor core flood pattern as claimed in claim 5, it is characterized in that：When second motor-driven valve (4), third motor-driven valve
(5) when the second cooling water is full of in opening, the cold leg (12), second cooling water can be through the cold pipe
Section (12), the second pipeline (10) enter the cooling boron water tank (2), while described first in the cooling boron water tank (2) is cold
But water can pass through the third pipeline (11), be directly injected into pipeline (13) into the reactor pressure vessel (14), compensation
The reactor coolant loop water loading amount；Second cooling water comes from the cold leg (12).
7. reactor core flood pattern as claimed in claim 5, it is characterized in that：When second motor-driven valve (4), third motor-driven valve
(5) when steam is full of in opening, the cold leg (12), the steam can be through the cold leg (12), second
Pipeline (10) enters the cooling boron water tank (2), while first cooling water in the cooling boron water tank (2) can pass through
The third pipeline (11) is directly injected into pipeline (13) the entrance reactor pressure vessel (14)；The steam comes from institute
State cold leg (12).
8. reactor core flood pattern as claimed in claim 5, it is characterized in that：When first motor-driven valve (3), the second motor-driven valve
(4), when third motor-driven valve (5) is in opening, first cooling water in the cooling boron water tank (2) can be described
Quickly, largely pass through the third pipeline (11) under the action of high pressure gas in high pressure gas storage case (1), be directly injected into
Pipeline (13) enters in the reactor pressure vessel (14).
9. reactor core flood pattern as claimed in claim 8, it is characterized in that：The institute stored in the high pressure gas storage case (1)
It is high pressure nitrogen to state high pressure gas, and the pressure of the high pressure gas in the high pressure gas storage case (1) is 4.2MPa.
10. reactor core flood pattern as claimed in claim 2, it is characterized in that：Described first in the cooling boron water tank (2) is cold
But water is boracic cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721350749.4U CN207541957U (en) | 2017-10-19 | 2017-10-19 | A kind of reactor core flood pattern |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721350749.4U CN207541957U (en) | 2017-10-19 | 2017-10-19 | A kind of reactor core flood pattern |
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| CN207541957U true CN207541957U (en) | 2018-06-26 |
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ID=62610698
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863293A (en) * | 2020-08-24 | 2020-10-30 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Injection system suitable for ocean nuclear power platform |
-
2017
- 2017-10-19 CN CN201721350749.4U patent/CN207541957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863293A (en) * | 2020-08-24 | 2020-10-30 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Injection system suitable for ocean nuclear power platform |
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