CN105179301B - Core main pump is with passive urgent injection water supply system - Google Patents
Core main pump is with passive urgent injection water supply system Download PDFInfo
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- CN105179301B CN105179301B CN201510627574.6A CN201510627574A CN105179301B CN 105179301 B CN105179301 B CN 105179301B CN 201510627574 A CN201510627574 A CN 201510627574A CN 105179301 B CN105179301 B CN 105179301B
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Abstract
The invention discloses a seed nucleus main pump with passive urgent injection water supply system, the system includes：Jet pump device (10) is set in HP cooler (9) upper flange lid, and connected with RCV systems (6) by connecting pipe, one runner (11) of processing in HP cooler (9) upper flange lid, jet pump device (10) mixing chamber is led in runner one end, the other end is connected by connecting pipe with an active system control valve (4), and in parallel with another active system control valve (3).Emergency sealing injection water supply system of the present invention just has two kinds of different supply status, water supply is reliably promptly injected so as to ensure that main pump occurs the break Shi Junyou of mistake of axle envelope injection water in operation and docking process, the drawbacks of present invention efficiently solves former urgent injection water system and can only be worked when main pump is operated, major loop high-temperature water flows through lower guide bearing when occurring that axle envelope injection water is disconnected to be lost so as to prevent in main pump docking process, it is that further treatment relevant issues have won the time under this operating mode, the environmental pollution for reducing the loss of nuclear power station and its being likely to result in.
Description
Technical field：The present invention relates to a seed nucleus main pump with passive urgent injection water supply system.
Background technology：Reactor coolant pump, i.e. core main pump, its main shaft seal are that control reactor coolant is let out along main shaft
The device of leakage, the safe and reliable operation with reactor coolant pump is closely related, and cooling seal system, compensation sealing are leaked
(high pressure throttling leakage and low pressure throttle and leaks) and lubrication and cooling lower guide bearing (graphite bearing) these work are required for axle
Envelope injection water, and on the other hand, because the pressure drop of cavity zone between main flange and heat shielding is less than RCP system pressures, once axle
The forfeiture of envelope injection water, can cause reactor coolant to be flowed up from pump case, and final lower guide bearing and axle envelope can be due to temperature
Spend high and fail, so as to cause reactor coolant leakage, environmental radiation pollution, therefore at any time, axle envelope injects water
Supply all must be definitely reliable.
For this problem, refer to promptly inject water supply system in published technology, i.e., passed in and out in itself using pump
Mouthful pressure difference, HP cooler is introduced by a unlatching for valve by reactor coolant, and HP cooler is by 290 degree of reactors
Cooling agent is cooled to less than 50 degree and is used for axle envelope, but this still has deficiency, and the mode of this circulation injection water can only be in main pump pump
Axle is just feasible in the case of rotating, and in the case of cannot but ensureing that main pump occurs injection water interruption in stopping process, still holds
Continuous reliable axle envelope injection water is used.
The content of the invention：The present invention seeks to trample there is provided a seed nucleus main pump passive urgent injection water supply system, purport
Supplementing and improve the reliability of former urgent injection water supply, so as to ensure to break down operating mode in nuclear power station：I.e. main pump is shut down
During axle envelope injection water is disconnected when losing, main pump still has urgent axle envelope injection water to use, the technical scheme is that：One seed nucleus master
Pump with passive urgent injection water supply system, it is characterized in that：By nuclear power stationization hold system RCV (6), chilled(cooling) water return (CWR) (12),
Urgent injection water loop (1) HP cooler (9) composition, after promptly injection water loop (1) is connected with pump case (19), successively through height
Pressure cooler (9), cyclone hydraulic separators (13) are connected with main pump sealing (18), and the helix tube (9.1) of HP cooler (9) is pipe
Journey connects urgent injection water loop (1), and the shell side (9.2) of HP cooler (9) connects chilled(cooling) water return (CWR) (12), in high pressure cooling
Jet pump device (10), wherein nozzle (10.2) connection sleeve pipe (10.1) of jet pump device (10) are installed in device (9) blind flange,
Sleeve pipe (10.1) is set with anemostat (10.3), and jet pump device (10) holds system RCV (6) phase by connecting pipe with nuclear power stationization
Connect, a runner (11) is provided with the blind flange on HP cooler (9), jet pump device (10) is led in runner (11) one end
Sleeve pipe (10.1) through hole, runner (11) other end is connected by connecting pipe with the second active system control valve (4), runner
(11) it is in parallel with the first active system control valve (3), tube side (9.1) arrival end of parallel pipeline one end and HP cooler (9)
Connection, the parallel pipeline other end and urgent injection water loop (1) pipeline communication, tube side (9.1) port of export of HP cooler (9)
It is connected with cyclone hydraulic separators (13), cyclone hydraulic separators (13) port of export is connected with stop valve (17), stop valve (17) is by urgent
Injection water loop (1) connecting pipe is connected to main pump sealing (18) place.
Operation principle of the invention is：
When occurring in main pump stopping process, axle envelope injection water is disconnected to be lost, and inlet outlet pressure differential is main pump in itself cannot to have utilized pump
Urgent injection water is provided, passive urgent injection water supply system now of the invention will be using jet pump device in inside and outside static pressure
By in the spontaneous suction jet pump device of major loop high-temperature water in the presence of difference, then cooled down through HP cooler, be main pump supply
A small amount of sealing injection water.
Technological merit of the invention is：
1st, will be from the middle urgent injection moisture for extracting of pump case (19) into two-way, respectively by the first active system control valve (3)
Controlled with the second active system control valve (4), so that urgent axle envelope injects water supply system by a kind of original supply status
It is divided into two kinds of different supply status, considerably increases the reliability that urgent axle envelope injection water is supplied under fault condition；
2nd, jet pump device (10) is built in the upper flange lid of HP cooler (9), under nominal situation, from nuclear power
The axle envelope injection water of station appearance system RCV (6) is supplied always as jet pump device (10) working solution, and by jet pump device
(10) HP cooler (9) is flowed into, then flows into main pump sealing (18), on the one hand this design simplifies main pump accessory system pipeline
And flange connection, dismounting facility, easy care, on the other hand also it is that urgent injection water when axle envelope injection water fault condition occurs is supplied
Passive power should be provided；
3rd, the mixing chamber of jet pump device (10) is designed to be provided with sleeve pipe (10.1) structure of through hole, as shown in figure 3, so
Just injection volume size and cavitation erosion property can be controlled by adjusting the size of through-hole diameter on sleeve pipe according to later experiments result
Energy；
4th, cyclone hydraulic separators (13) is installed on urgent axle envelope injection water loop (1) pipeline after HP cooler (9), tightly
During anxious axle envelope injection water supply, cyclone hydraulic separators (13) will filter out the bulky grain molecule more than 5 μm, avoid sealing system
Unnecessary pollution, so that extend the service life of sealing system, it is also possible to reduce the composition of pollutant；
Stop valve (17) the 5th, is installed, so, in core on urgent injection water loop (1) pipeline after cyclone hydraulic separators (13)
During power plant maintenance, the cleaning to cyclone hydraulic separators can just be realized by stop valve (17)；
6th, cyclone hydraulic separators (13) is connected with motor-driven valve (14), and during maintenance work, cyclone hydraulic separators can be by valve
Door (14) opens the filtrate in discharge catch basin；
7th, pacify on the pipeline before the sealing injection water for holding system RCV (6) from nuclear power stationization enters HP cooler (9)
A check (non-return) valve (7) and a stop valve (5) are filled, so as to prevent major loop aqueous reflux to hold system to sealing injection nuclear power stationization
In RCV (6).
Therefore the invention can ensure that main pump has safety when running, stopping process generation axle envelope injection water break and loses
Reliable injection water supply.
Brief description of the drawings：
The passive urgent injection water supply systems of Fig. 1
Fig. 2 HP cooler upper flange lid sectional views
Fig. 3 jets pump sleeve (10.1) section of structure
Specific embodiment：
As shown in figure 1, a seed nucleus main pump is with passive urgent injection water supply system, by nuclear power stationization hold system RCV6,
Chilled(cooling) water return (CWR) 12, the urgent injection HP cooler 9 of water loop 1 are constituted, after urgent injection water loop 1 is connected with pump case 19, according to
Secondary to be connected with main pump sealing 18 through HP cooler 9, cyclone hydraulic separators 13, the helix tube 9.1 of HP cooler 9 is that tube side connects
Logical urgent injection water loop 1, the shell side 9.2 of HP cooler 9 connects chilled(cooling) water return (CWR) 12, in the blind flange of HP cooler 9
Jet pump device 10 is installed, as shown in Fig. 2 the wherein connection sleeve pipe 10.1 of nozzle 10.2 of jet pump device 10,10.1 sets of sleeve pipe
Dress anemostat 10.3, jet pump device 10 holds system RCV6 and connects by connecting pipe and nuclear power stationization, on HP cooler 9
Blind flange in be provided with a runner 11, as shown in figure 3, the through hole of sleeve pipe 10.1 of jet pump device 10 is led in the one end of runner 11
Place, the other end of runner 11 is connected by connecting pipe with the second active system control valve 4, the control of the active system of runner 11 and first
Valve 3 is in parallel, and parallel pipeline one end connects with the arrival end of tube side 9.1 of HP cooler 9, the parallel pipeline other end and promptly injection
The pipeline communication of water loop 1, the port of export of tube side 9.1 of HP cooler 9 is connected with cyclone hydraulic separators 13, and cyclone hydraulic separators 13 is exported
End is connected with stop valve 17, and stop valve 17 is connected at main pump sealing 18 by the urgent injection connecting pipe of water loop 1.
The urgent injection water drawn from pump case 19 is divided into two pipelines, is respectively mounted the He of the first active system control valve 3
Second active system control valve 4, the second temperature instrumentation 15 and pressure instrumentation 16 are arranged on the urgent injection pipeline of water loop 1, the
One temperature instrumentation 2 is arranged on the urgent injection pipeline of water loop 1, and measurement of discharge instrument 8 is arranged on nuclear power stationization appearance system RCV6 and connects
On adapter road.
When the axle envelope injection water supply of nuclear power stationization appearance system RCV6 is normal, axle envelope injection water enters through jet pump device 10
HP cooler 9 eventually enters into main shaft seal 18, is used for axle envelope.
During main pump runs, if axle envelope injection water is interrupted, the first active system control valve 3 will be opened, now by pump
Suction side and outlet side between pressure differential, it is cold that major loop high-temperature water flows into high pressure from pump case 19 along urgent injection water lines 1
But device 9, cool down through HP cooler 9, cyclone hydraulic separators 13 filter it is laggard become owner of shaft seal 18, used for axle envelope, it is this tight
The method of supplying of anxious axle envelope injection water is only feasible in the case where main pump pump shaft rotates.
Once main pump stops, the active system control valve 4 of circulation seal injection water second will be opened, because axle envelope injects current
Flow velocity increases during through jet Unit injector 10.2, and static energy is partially converted into kinetic energy, is shape in sleeve pipe 10.1 in Jet Pump Mixture room
Into vacuum, so that with the unlatching of the second active system control valve 4, this pressure difference will note major loop water and sealing as power
Enter water to mix in jet pump, even if therefore now sealing injection water interrupt, major loop water still can under this power give main pump supply
A small amount of sealing injection water.
Claims (2)
1. a seed nucleus main pump is with passive urgent injection water supply system, it is characterized in that：System RCV (6), cold is held by nuclear power stationization
But water loop (12), promptly injection water loop (1) HP cooler (9) composition, promptly inject water loop (1) with pump case (19) even
After connecing, it is connected with main pump sealing (18) through HP cooler (9), cyclone hydraulic separators (13) successively, the spiral shell of HP cooler (9)
Coil (9.1) is that tube side connects urgent injection water loop (1), and the shell side (9.2) of HP cooler (9) connects chilled(cooling) water return (CWR)
(12) jet pump device (10), the wherein nozzle (10.2) of jet pump device (10), are installed in HP cooler (9) blind flange
Connection sleeve pipe (10.1), sleeve pipe (10.1) is set with anemostat (10.3), and jet pump device (10) is by connecting pipe and nuclear power station
Change appearance system RCV (6) to connect, a runner (11) is provided with the blind flange on HP cooler (9), runner (11) one end leads to
To sleeve pipe (10.1) through hole of jet pump device (10), runner (11) other end passes through connecting pipe and the second active system control
Valve (4) processed connection, runner (11) is in parallel with the first active system control valve (3), parallel pipeline one end and HP cooler (9)
Tube side (9.1) arrival end is connected, the parallel pipeline other end and promptly injection water loop (1) pipeline communication, HP cooler (9)
Tube side (9.1) port of export is connected with cyclone hydraulic separators (13), and cyclone hydraulic separators (13) port of export is connected with stop valve (17), cut-off
Valve (17) is connected to main pump sealing (18) place by urgent injection water loop (1) connecting pipe.
2. seed nucleus main pump according to claim 1 is with passive urgent injection water supply system, it is characterized in that：From pump case
(19) the urgent injection water drawn is divided into two pipelines, is respectively mounted the first active system control valve (3) and the second active system
System control valve (4), the second temperature instrumentation (15) and pressure instrumentation (16) are injected on water loop (1) pipeline installed in urgent, and first
On urgent injection water loop (1) pipeline, measurement of discharge instrument (8) holds system RCV to temperature instrumentation (2) installed in nuclear power stationization
(6) on connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627574.6A CN105179301B (en) | 2015-09-28 | 2015-09-28 | Core main pump is with passive urgent injection water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627574.6A CN105179301B (en) | 2015-09-28 | 2015-09-28 | Core main pump is with passive urgent injection water supply system |
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| Publication Number | Publication Date |
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| CN105179301A CN105179301A (en) | 2015-12-23 |
| CN105179301B true CN105179301B (en) | 2017-06-27 |
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| CN201510627574.6A Active CN105179301B (en) | 2015-09-28 | 2015-09-28 | Core main pump is with passive urgent injection water supply system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465053A (en) * | 2015-12-24 | 2016-04-06 | 福斯流体控制（苏州）有限公司 | Self-circulation flushing system of seawater circulating pump shaft seal |
| CN112681447B (en) * | 2021-01-06 | 2022-07-05 | 三门核电有限公司 | Nuclear power station plant water pump shaft seal water supply system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT279747B (en) * | 1968-07-30 | 1970-03-10 | Andritz Ag Maschf | Plant for cleaning the coolant of nuclear reactors |
| US4024911A (en) * | 1974-03-18 | 1977-05-24 | Combustion Engineering, Inc. | Pump shaft seal injection system |
| CN1059490C (en) * | 1993-04-01 | 2000-12-13 | 三隆过滤器工业株式会社 | An apparatus for supply and circulation of cooling water to and through a sealing portion of a rotary shaft of a pump |
| CN202948738U (en) * | 2012-10-22 | 2013-05-22 | 中国核动力研究设计院 | Kinetic and non-kinetic combined waste heat discharging system |
| CN103790855A (en) * | 2014-02-21 | 2014-05-14 | 清华大学 | Nuclear main pump mechanical seal system with active and passive shutdown sealing |
| CN205064358U (en) * | 2015-09-28 | 2016-03-02 | 哈尔滨电气动力装备有限公司 | Urgent bearing seal injected water feeding mechanism of nuclear main pump |
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