CN105469846B - Nuclear power station steam generator auxiliary feedwater system - Google Patents
Nuclear power station steam generator auxiliary feedwater system Download PDFInfo
- Publication number
- CN105469846B CN105469846B CN201510802269.6A CN201510802269A CN105469846B CN 105469846 B CN105469846 B CN 105469846B CN 201510802269 A CN201510802269 A CN 201510802269A CN 105469846 B CN105469846 B CN 105469846B
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- China
- Prior art keywords
- steam generator
- nuclear power
- power station
- centrifugal pump
- station steam
- 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.)
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/08—Regulation of any parameters in the plant
- G21D3/12—Regulation of any parameters in the plant by adjustment of the reactor in response only to changes in engine demand
- G21D3/14—Varying flow of coolant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/004—Control systems for steam generators of nuclear power plants
-
- 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
- G21C15/182—Emergency cooling arrangements; Removing shut-down heat comprising powered means, e.g. pumps
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of nuclear power station steam generator auxiliary feedwater systems, it includes the water tank and centrifugal pump that circulation loop is connected by several pipelines, wherein, pipeline at centrifugal pump upstream entrance is equipped with the siphon pipe that can be connected to drug bucket, and the pipeline at centrifugal pump lower exit is equipped with purifier.In nuclear power station steam generator auxiliary feedwater system of the present invention, the siphon pipe being connected in drug bucket is equipped at centrifugal pump inlet, drug is added in pipeline for siphon before being pumped when by playing pump, purifying water-storage tank is rinsed using centrifugal pump power cycle, realize online dosing, avoid the high risk operations such as lifting, eminence dosing, have many advantages, such as conveniently, safely, it is quick.The purifier equipped with washable filter core is installed at centrifugal pump lower exit pipeline, water tank purification needs can be met.
Description
Technical field
The invention belongs to nuclear power stations to debug field, it is more particularly related to a kind of nuclear power equipped with chemicals dosing plant
It stands steam generator auxiliary feedwater system.
Background technology
Steam generator auxiliary feedwater system system (ASG) is as the engineered safety system in pressurized water reactor type, in accident
It is that steam generator (SG) provides water supply, cooling primary Ioops to substitute normal water supply.In general, every unit is all provided with, there are one ASG to store up
Water tank, auxiliary feed water pump subsystem and related pipeline, valve.Auxiliary feed water pump subsystem is replenished to SG from ASG water tank intakes
It is interior.When unit normal operation, desalination/deoxygenation alkaline water is stored in ASG water tanks, capacity is about 1200 cubic metres.
In erection stage, after installation personnel completes the processes such as the sandblasting of ASG water storage chamber interior walls, polishing, the water-soluble wax maintenance of smearing,
ASG water tanks are transferred and are debugged.In order to ensure that ASG water tanks can be used within the nuclear power station full phase in longevity, need to do more in the debugging stage
More maintenance works, including：Flushing, purifying water-storage tank inner storing water are added chemicals (predominantly ammonium hydroxide and hydrazine) passivation, add
Enter the work such as chemicals adjustment water quality wet preservation.
| Index | Acceptability limit |
| Chloride | <0.15mg/kg |
| Fluoride | <0.15mg/kg |
| 25 DEG C of cation electrodeposition conductances | <1.00μs/cm |
| Suspended matter | <0.1mg/kg |
| 25 DEG C of pH value | 8.8-9.8 |
| Transparency | Without muddy and sediment |
| Silicon ion | <0.02mg/kg |
ASG water tanks full water need to be passivated 168 hours or more in the case where meeting upper table ASG water tank water quality requirements, with
Fine and close oxidation film is formed in ASG water storage chamber interior walls, ensures availability of the ASG water tanks within the nuclear power station entire phase in longevity.In addition to
Passivation maintenance is outer, and the debugging stage also needs to multipass and chemicals is added to ASG water tanks progress water quality adjustment, purification.
ASG water tank volumes are larger, and purification, dosing heavy workload, difficulty are high.Prior art purification ASG water tanks pass through
Multiple water-filling, draining, utilize gravity flush ASG water tanks.Add and chemicals is hung to ASG water storages using hanging wheel when chemicals
Box top dosing mouth, is manually poured into water tank.By repeatedly filling draining gravity flush ASG water tanks, often executes and once fill row
Water needs 1200 cubic meter of water, since only by gravity flush, effect unobvious rule of thumb need to carry out 5-6 times, not only unrestrained
Take a large amount of demineralized waters, and fill row every time and take relatively long, completes to fill for 5-6 time to drain and about need 7-9 days.
It needs to lift by crane drug using hanging wheel when adding chemicals, be calculated with 1200 cubic meter of water amounts, each dosing needs
About 25 barrels of the hydrazine hung (7% every barrel of concentration 20kg), 35 barrels of ammonium hydroxide (4% concentration, every barrel of 25kg), slinging work amount is big, simultaneously
Dosing mouth is located at the top of ASG water tanks, and narrow space, ventilation are unsmooth, and when using manually pouring into drug, irritation chemicals is big
Amount volatilization encroaches on staff, and falls industrial risk with larger personnel.
In view of this, it is necessory to provide a kind of nuclear power station steam generator that can conveniently, safely complete dosing assist to
Water system.
Invention content
It is an object of the invention to：There is provided a kind of nuclear power station steam generator that can conveniently, safely complete dosing assist to
Water system.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of nuclear power station steam generator auxiliary feedwater system,
Include the water tank and centrifugal pump that circulation loop is connected by several pipelines, wherein centrifugal pump upstream is equipped with drug bucket, medicine
Product bucket is connected to by siphon pipe on the pipeline at centrifugal pump upstream entrance.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, at the centrifugal pump lower exit
Pipeline be equipped with purifier.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, the purifier sets for parallel connection
Two set arrange washable filter cores, and shut-off valve is designed on the pipeline at the washable filter core both ends of each column.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, at the centrifugal pump lower exit
Pipeline be equipped with the differential pressure gauge in parallel with purifier.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, the differential pressure gauge is that dial type is poor
Press table, range ability 0-100kpa.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, when the differential pressure of differential pressure gauge is more than
Washable filter core is replaced when 20kpa.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, the siphon pipe is equipped with isolation
Valve.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, the pipeline is carbon steel tube wall gold
Metal conduit.
As a kind of improvement of nuclear power station steam generator auxiliary feedwater system of the present invention, the siphon pipe is that metal is soft
Pipe.
Compared with the existing technology, nuclear power station steam generator auxiliary feedwater system of the present invention has the following advantages：
1) siphon pipe welded at centrifugal pump inlet is connected in drug bucket, preceding siphon is pumped when by playing pump, drug is added
In pipeline, purifying water-storage tank is rinsed using centrifugal pump power cycle, realizes online dosing, it is contour to avoid lifting, eminence dosing
Risk operations, have many advantages, such as conveniently, safely, it is quick.
2) purifier equipped with washable filter core is installed at centrifugal pump lower exit pipeline, meets the purification of water tank
It needing, and the aperture of filter screen of washable filter core can be replaced, initial stage uses large aperture strainer, later stage to be changed to small-bore strainer,
Meet different debugging stage purification demands.
3) use equipment less, it is relatively cost-effective.
Description of the drawings
With reference to the accompanying drawings and detailed description, nuclear power station steam generator auxiliary feedwater system of the present invention is carried out detailed
Describe in detail it is bright, wherein：
Fig. 1 is the structural schematic diagram of nuclear power station steam generator auxiliary feedwater system of the present invention.
Specific implementation mode
In order to make goal of the invention, technical solution and its technique effect of the present invention be more clear, below in conjunction with attached drawing and tool
Body embodiment, the present invention is described in more detail.It should be understood that specific implementation mode described in this specification is only
Merely to explaining the present invention, it is not intended to limit the present invention.
Refering to Figure 1, nuclear power station steam generator auxiliary feedwater system of the present invention includes：Connected by several pipelines
It is connected into the water tank 10 and centrifugal pump 20 of circulation loop, wherein the pipeline at 20 upstream entrance of centrifugal pump, which is equipped with, can be connected to
The siphon pipe 30 of drug bucket (not shown), the pipeline at 20 lower exit of centrifugal pump are equipped with purifier 40.
Centrifugal pump 20 is used for the cycle for nuclear power station steam generator auxiliary feedwater system, purification provides power, while
Pipeline is added and squeezes into water tank 10 for the drug in siphon pipe 30, power is provided.In the shown embodiment, centrifugal pump 20
Supply voltage be 380v, using ventilated machine, outlet lift is not less than 30m, and metered flow is not less than 30t/h.
Siphon pipe 30 uses metal hose, a diameter of 15mm to be provided with isolating valve (T3) on siphon pipe 30.Dosing is initial
Before, the isolating valve on siphon pipe 30 is closed, manually fills demineralized water from 30 inlet of siphon pipe, excludes gas in siphon pipe 30.
After starting centrifugal pump 20, siphon pipe 30 is inserted into from drug bung hole in drug bucket, and siphon pipe 30 is covered using clean rag
With the gap between drug bung hole, with prevent irritation drug volatilize.The isolating valve before siphon pipe 30 is slowly opened manually, it is considerable
Drug is observed to enter in system pipeline.After one barrel of drug adds, repeating above-mentioned action can continuous dosing.
40 one end of purifier is connected by pipeline at 20 lower exit of centrifugal pump, and the other end connects water tank by pipeline
10.In the shown embodiment, purifier 40 is using two row washable filter core in parallel, and the washable filter core both ends of each column are all
Equipped with shut-off valve (T14-T17).Circularly purifying for a period of time after, observe 50 registration of washable filter core both ends differential pressure gauge rise
When to 20kpa, can stop transport centrifugal pump 20, carry out washable filter core under being dismantled after being isolated and cleaned.In end-of-term examination at the beginning of circularly purifying
It is poor to consider water quality condition, uses 200 μm of washable filter cores in aperture；It is washable using 50 μm of apertures after water quality condition improvement
Filter core.
The differential pressure gauge 50 in parallel with purifier 40 is equipped between the pipeline at 40 both ends of purifier, for reading purification dress
Set the differential pressure at 40 both ends.In the shown embodiment, differential pressure gauge 50 is dial type differential pressure gauge, and the range ability of differential pressure gauge 50 is 0-
100kpa.(it is more than 20kpa) when differential pressure is higher, needs idle (off-stream) unit to carry out filter core and unpick and wash work.
In nuclear power station steam generator auxiliary feedwater system of the present invention, all pipelines all use carbon steel pipe wall metallic pipe road,
For each device in connection system, connected using arc welding at pipe joint.
Shown in Fig. 1, the operational process of nuclear power station steam generator auxiliary feedwater system of the present invention is as follows：
After each device is connected by pipeline, water-filling exhaust is carried out to system, after measurement motor insulation is qualified, start from
Heart pump 20, the size for observing washable filter core differential pressure registration meet the requirements.
Siphon pipe 30 its entrance is inserted into drug bucket after bath exhaust, the isolation before siphon pipe 30 is slowly opened
Valve proceeds by dosing.
After the completion of purifying dosing work, stoppage in transit centrifugal pump 20 disconnects 20 power supply of centrifugal pump, closes the isolation before siphon pipe 30
The connecting valve of valve and ASG water tanks 10 empties siphon pipe 30.
Compared with the existing technology, nuclear power station steam generator auxiliary feedwater system of the present invention has the following advantages：
1) siphon pipe 30 of 20 inlet of centrifugal pump is connected in drug bucket, preceding siphon is pumped when by playing pump, drug is added
In pipeline, purifying water-storage tank 10 is rinsed using the power cycle of centrifugal pump 20, online dosing is realized, avoids lifting, eminence adds
The high risk operations such as medicine, have many advantages, such as conveniently, safely, it is quick.
2) washable filter core 40 is installed at 20 lower exit pipeline of centrifugal pump, meets the purification needs of water tank 10, and
The aperture of filter screen of washable filter core 40 can be replaced, and initial stage uses large aperture strainer, later stage to be changed to small-bore strainer, meets not
Demand is purified with the debugging stage.
3) use equipment less, it is relatively cost-effective.
According to above-mentioned principle, the present invention can also carry out change and modification appropriate to the above embodiment.Therefore, this hair
It is bright to be not limited to specific implementation mode disclosed and described above, some modifications and changes of the present invention should also be as to fall into this
In the scope of the claims of invention.In addition, although having used some specific terms, these terms in this specification
Merely for convenience of description, it does not limit the present invention in any way.
Claims (9)
1. a kind of nuclear power station steam generator auxiliary feedwater system includes the water storage for connecting into circulation loop by several pipelines
Case and centrifugal pump, it is characterised in that：The centrifugal pump upstream is equipped with drug bucket, and drug bucket is connected to by siphon pipe on centrifugal pump
On the pipeline for swimming inlet.
2. nuclear power station steam generator auxiliary feedwater system according to claim 1, it is characterised in that：Under the centrifugal pump
The pipeline for swimming exit is equipped with purifier.
3. nuclear power station steam generator auxiliary feedwater system according to claim 2, it is characterised in that：The purifier
Two to be arranged in parallel arrange washable filter cores, and shut-off valve is designed on the pipeline at the washable filter core both ends of each column.
4. nuclear power station steam generator auxiliary feedwater system according to claim 2 or 3, it is characterised in that：The centrifugation
It pumps the pipeline at lower exit and is equipped with the differential pressure gauge in parallel with purifier.
5. nuclear power station steam generator auxiliary feedwater system according to claim 4, it is characterised in that：The differential pressure gauge is
Dial type differential pressure gauge, range ability 0-100kpa.
6. nuclear power station steam generator auxiliary feedwater system according to claim 5, it is characterised in that：When the difference of differential pressure gauge
Pressure replaces washable filter core when being more than 20kpa.
7. nuclear power station steam generator auxiliary feedwater system according to claim 1, it is characterised in that：On the siphon pipe
Equipped with isolating valve.
8. nuclear power station steam generator auxiliary feedwater system according to claim 1, it is characterised in that：The pipeline is carbon
Steel pipe walls metallic conduit.
9. nuclear power station steam generator auxiliary feedwater system according to claim 1, it is characterised in that：The siphon pipe is
Metal hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802269.6A CN105469846B (en) | 2015-11-18 | 2015-11-18 | Nuclear power station steam generator auxiliary feedwater system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802269.6A CN105469846B (en) | 2015-11-18 | 2015-11-18 | Nuclear power station steam generator auxiliary feedwater system |
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| Publication Number | Publication Date |
|---|---|
| CN105469846A CN105469846A (en) | 2016-04-06 |
| CN105469846B true CN105469846B (en) | 2018-07-20 |
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| CN201510802269.6A Active CN105469846B (en) | 2015-11-18 | 2015-11-18 | Nuclear power station steam generator auxiliary feedwater system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108511090A (en) * | 2018-03-08 | 2018-09-07 | 中国核电工程有限公司 | A kind of cooling water tank component of nuclear power plant's secondary side passive cooling system |
| CN110486709A (en) * | 2019-08-15 | 2019-11-22 | 岭澳核电有限公司 | A kind of nuclear power station steam generator drainage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030518C (en) * | 1992-09-29 | 1995-12-13 | 清华大学 | Siphon tube type gravity boron implantation system for reactor |
| DE60127449T2 (en) * | 2000-12-14 | 2008-02-14 | Pebble Bed Modular Reactor (Proprietary) Ltd. | COOLING SYSTEM |
| JP4764411B2 (en) * | 2007-12-27 | 2011-09-07 | 三菱重工業株式会社 | pH adjustment system and pH adjustment method |
| CN201232666Y (en) * | 2008-08-04 | 2009-05-06 | 天津市津风特种风机技术开发有限公司 | Blower fan with filter box |
| CN202113829U (en) * | 2011-05-26 | 2012-01-18 | 苏州森泰动力环保工程有限公司 | Air purifying device with automatic fluid-phase chemical feeding system |
| CN204010702U (en) * | 2014-06-03 | 2014-12-10 | 中国核电工程有限公司 | A kind of steam generator emergency feedwater supply system |
| CN104925922B (en) * | 2015-05-13 | 2017-07-21 | 韩炳申 | Quick sewage purification device |
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