CN206961524U - Nuclear power plant steam air tapping equipment - Google Patents
Nuclear power plant steam air tapping equipment Download PDFInfo
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- CN206961524U CN206961524U CN201720512751.0U CN201720512751U CN206961524U CN 206961524 U CN206961524 U CN 206961524U CN 201720512751 U CN201720512751 U CN 201720512751U CN 206961524 U CN206961524 U CN 206961524U
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- steam
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- discharge
- valve
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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 discloses a kind of nuclear power plant steam air tapping equipment, including discharge isolating valve, main exhaust-control valve and secondary exhaust-control valve.Discharge isolating valve is located on the first discharge pipe line being connected with main steam pipe, and main exhaust-control valve is respectively provided on two second discharge pipe lines being connected with the first discharge pipe line with secondary exhaust-control valve.Main steam pipe of some above-mentioned tapping equipments respectively with some steam generators is connected.After appearance accident, by controlling the opening and closing of different valves, first isolate damaged steam generator, be exhausted and decrease temperature and pressure by other steam generators, finally damaged steam generator, which is exhausted, again makes secondary circuit pressure be reduced to saturation pressure.This tapping equipment can greatly reduce the discharge of radioactivity steam, and can prevent secondary circuit water from flowing back to primary Ioops in this process.
Description
Technical field
It the utility model is related to nuclear power plant's technical field, more particularly to a kind of nuclear power plant's secondary circuit atmospheric steam dump dress
Put.
Background technology
The capital equipment of Zhong Yaanzhu types nuclear power plant includes pressure vessel, voltage-stablizer, steam generator (abbreviation SG), vapour
Turbine, generator and condenser etc..Wherein, pressure vessel, voltage-stablizer and SG (typically having 3) are located in containment, and pressure is held
Nuclear fuel is mounted with device, and the equipment such as steam turbine, generator and condenser is located at outside containment.Pressure vessel is with being located in SG
Heat-transfer pipe form primary Ioops, SG main steam pipe passed by containment penetration outside containment and with steam turbine, cold
Condenser forms secondary circuit, and main steam isolation valve is provided with SG main steam pipe.Heat caused by nuclear reaction is by primary Ioops water
Take in heat-transfer pipe, the secondary circuit water in SG is heated boiling, and vapor, which enters in steam turbine, promotes wheel rotation, so as to realize
Nuclear energy power generation.For pressure stability in maintenance system, atmospheric steam dump system (VDA) is additionally provided with main steam pipe.
In normal conditions, primary Ioops water is related isolation to secondary circuit water, is broken when steam generator heat-transfer pipe occurs
During damage accident (SGTR), primary Ioops water can be entered in secondary circuit, and primary Ioops exceed saturation pressure with pressure rise in secondary circuit,
VDA can carry out stress reduction processing.But current VDA is during stress reduction, contaminated radioactivity steam in secondary circuit
It can be released in significant quantities into because HTHP acts in air, large effect is caused to external environment.
In order to avoid the above situation, it is necessary to provide a kind of air row that the release of radioactivity steam can be reduced in accident
Put device.
Utility model content
The purpose of this utility model is to provide a kind of air discharge that can reduce the release of radioactivity steam in accident
Device.
To achieve these goals, the utility model provides a kind of nuclear power plant steam air tapping equipment, is connected to peace
On main steam pipe outside full shell, main steam pipe is provided with main steam isolation valve, including discharge isolating valve, main emission control
Valve, secondary exhaust-control valve, the first discharge pipe line and two second discharge pipe lines, one end of the first discharge pipe line are connected to main steam
Pipeline and link position is between containment and main steam isolation valve, discharge isolating valve is on the first discharge pipe line, and two the
Two discharge pipe lines are connected to the other end of the first discharge pipe line, and main exhaust-control valve is respectively arranged at secondary exhaust-control valve
On two second discharge pipe lines.
Because Zhong Yaanzhu types nuclear power plant generally employ anti-spill-over measure, i.e., will not occur to release from damaged steam generator
The risk of tapping body.Therefore radioactivity release is related to the radgas gross mass discharged.Tapping equipment of the present utility model
Include discharge isolating valve, main exhaust-control valve and secondary exhaust-control valve, can be by closing main steaming after breakage event occurs
Vapour isolating valve closes the air exhaust system of the steam generator of breakage with discharge isolating valve, then intact by opening other
Steam generator corresponding to discharge isolating valve and main exhaust-control valve carry out the decrease temperature and pressure of part cooling stage.Work as part
Discharge isolating valve corresponding to damaged steam generator and secondary exhaust-control valve are opened after the completion of cooling stage again, now in secondary circuit
Steam burst size greatly reduce, so as to reduce radioactive pollution.
It is preferred that also include the muffler for being connected to two second discharge end of line.Muffler is used to cut down discharge of steam
During caused unacceptable noise, with protection staff and environment.
Brief description of the drawings
Fig. 1 is the system composition schematic diagram of the utility model nuclear power plant steam air tapping equipment.
Fig. 2 is the pressure change schematic diagram of primary Ioops in SGTR accidents, secondary circuit.
Embodiment
Description is made to preferred embodiment of the present utility model with reference to the Figure of description provided.
Because Zhong Yaanzhu types nuclear power plant generally employ anti-spill-over measure, i.e., will not occur to release from damaged steam generator
The risk of tapping body, therefore radioactivity release is related to the radgas gross mass discharged, the utility model provides a seed nucleus
Power plant steam air tapping equipment, it is total for reducing the radgas outwardly discharged during stress reduction under accident conditions
Quality.
As shown in figure 1, containment 1 is located in safe factory building 2, steam generator 3 is located in containment 1, steam generator 3
Main steam pipe 31 passed by containment penetration 11 outside containment 1, main steam pipe 31 provided with main steam isolate
Valve 32.Some safety dumping pipelines 33 are connected with main steam pipe 31, safety dumping pipeline 33 is connected with main steam pipe 31
Position between containment penetration 11 and main steam isolation valve 32, each safety dumping pipeline 33 is provided with a main steam
Safety valve 34.
The utility model nuclear power plant steam air tapping equipment includes the discharge isolating valve 4 in safe factory building 2, main row
Put control valve 5, secondary exhaust-control valve 6, the first discharge pipe line 7 and two second discharge pipe lines 8.
One end of first discharge pipe line 7 is connected on an ozzle of main steam pipe 31, and the position of the ozzle is positioned at peace
Between full shell penetration piece 11 and main steam isolation valve 32, say in more detail, be positioned at containment penetration 11 and safety dumping pipe
Between line 33.Isolating valve 4 is discharged on the first discharge pipe line 7.Two second discharge pipe lines 8 are connected to the first discharge pipe line
7 other end, main exhaust-control valve 5 are respectively arranged on two second discharge pipe lines 8 with secondary exhaust-control valve 6.One muffler 9 connects
Be connected to the end of two second discharge pipe line 8 and on the roof of safe factory building 2.Muffler 9 is used to cut down discharge of steam process
In caused unacceptable noise, with protection staff and environment.
Three steam generators 3 are typically provided in containment 1, then each self-corresponding main steam pipe of three steam generators 3
An above-mentioned nuclear power plant steam air tapping equipment is respectively arranged with line 31, between three nuclear power plant steam air tapping equipments
Cooperate to complete the release of the pressure under accident conditions.
When normal reactor operation or when cooling down normal shutdown in steam generator 3, corresponding to all steam generators 3
Discharge isolating valve 4 is remained turned-off with secondary exhaust-control valve 6, and main exhaust-control valve 5 is kept it turned on, and main exhaust-control valve 5 is as superfluous
Remaining setting, advantageously reduce secondary circuit superpressure risk.The aperture of main exhaust-control valve 5 depends on power plant's power level, Yi Jipai
Put isolating valve 4 and open by mistake the limitation requirement that supercooling is prevented in event.The setting valve of main exhaust-control valve 5 and secondary exhaust-control valve 6 is equal
It can be adjusted in real time by system.
When there is steam generator tube ruptures accident (SGTR), the utility model uses following pressure release side
Method：
After the triggering of secondary circuit radioactivity high RST, main steam isolation valve 32 and row corresponding to damaged steam generator 3
Put isolating valve 4 to remain turned-off, the setting valve of corresponding main exhaust-control valve 5 improves；
After peace note signal triggering, discharge isolating valve 4 and main exhaust-control valve 5 corresponding to unbroken steam generator 3
Open, the valve setting valve of main exhaust-control valve 5 is adjusted according to given variation pattern, and secondary exhaust-control valve 6 keeps closing
Close；
Discharge isolating valve 4 corresponding to the damaged steam generator 3 of operator's manual unlocking, now due to corresponding secondary row
The setting valve of control valve 6 is put less than pressure in damaged steam generator 3, secondary exhaust-control valve 6, which can be opened, to be exhausted.
The secondary exhaust of exhaust-control valve 6 corresponding to damaged steam generator 3 is until the secondary side drop of damaged steam generator 3
Its saturation state is depressed into, and then causes primary Ioops decompression less than middle pressure peace note injection pressure head, so as to prevent the breakage of long periods
The refluence of 3 two lateral primary Ioops of steam generator.
During the utility model pressure method for releasing carries out pressure release, the pressure trend of whole system is as schemed
Shown in 2.In the early stage in L1 stages, discharge isolating valve 4 corresponding to intact steam generator 3 and main exhaust-control valve 5 open into
Row exhaust, declines pressure, to the later stage in L1 stages, the setting valve of main exhaust-control valve 5 of intact steam generator 3 is adjusted to
Just no longer decline during 6MPa, main exhaust-control valve 5 is closed, pressure transient equilibrium.In the whole L1 stages, because the steam of breakage is sent out
Valve corresponding to raw device 3 is all not turned on, therefore its pressure does not decline.In the L2 stages, continue to reduce intact steam generator 3
The corresponding setting valve of main exhaust-control valve 5, the downward of the setting valve can strengthen the heat transfer of a secondary circuit so that primary Ioops and breakage
The pressure and temp of steam generator 3 declines, but due to the injection of security system, the pressure of primary Ioops and damaged steam generator 3
Drop to when middle pressure peace note closes lift and just stop have dropped.After the L2 stages, where manual unlocking breakage steam generator 3
The discharge isolating valve 4 of loop, now because the secondary setting valve of exhaust-control valve 6 is less than damaged SG pressure, secondary exhaust-control valve 6 starts
Outwards exhaust, until the damaged pressure of steam generator 3 is less than setting valve.
Compared with prior art, the utility model nuclear power plant steam air tapping equipment with pressure method for releasing by putting
The exhaust system of damaged steam generator 3 is isolated after the triggering of penetrating property high RST to prevent a large amount of steam of initial stage from discharging,
Greatly reduce radioactive pollution.Then it is cold to carry out part using tapping equipment exhaust corresponding to intact steam generator 3
But the decrease temperature and pressure in stage, finally just open damaged steam generator 3 corresponding to tapping equipment be exhausted, make secondary circuit pressure
Saturation pressure is dropped to, while pressure progressively drops to middle pressure peace note shutoff head in primary Ioops, prevents in the case where pressure differential acts on
Secondary circuit cooling water flows back to primary Ioops.
Above disclosed is only preferred embodiments of the present utility model, and its effect is to facilitate those skilled in the art
Understand and implement according to this, the interest field of the utility model can not be limited with this certainly, thus it is special according to the present utility model application
The equivalent variations that sharp scope is made, still fall within the scope that the utility model is covered.
Claims (4)
1. a kind of nuclear power plant steam air tapping equipment, is connected on the main steam pipe outside containment, the main steam pipe
Line is provided with main steam isolation valve, it is characterised in that：The nuclear power plant steam air tapping equipment includes discharge isolating valve, main row
Control valve, secondary exhaust-control valve, the first discharge pipe line and two second discharge pipe lines are put, one end of first discharge pipe line connects
It is connected to the main steam pipe and link position is between the containment and the main steam isolation valve, the discharge isolation
For valve on first discharge pipe line, two second discharge pipe lines are connected to the another of first discharge pipe line
End, the main exhaust-control valve are respectively arranged on two second discharge pipe lines with secondary exhaust-control valve.
2. nuclear power plant steam air tapping equipment as claimed in claim 1, it is characterised in that：Also include being connected to two described the
The muffler of two discharge pipe line ends.
3. nuclear power plant steam air tapping equipment as claimed in claim 1, it is characterised in that：The containment is provided with some institutes
Main steam pipe is stated, a nuclear power plant steam air tapping equipment is equipped with each main steam pipe.
4. nuclear power plant steam air tapping equipment as claimed in claim 1, it is characterised in that：The discharge isolating valve is arranged with secondary
Put control valve and be in normally off, the main exhaust-control valve is in normally open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720512751.0U CN206961524U (en) | 2017-05-09 | 2017-05-09 | Nuclear power plant steam air tapping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720512751.0U CN206961524U (en) | 2017-05-09 | 2017-05-09 | Nuclear power plant steam air tapping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206961524U true CN206961524U (en) | 2018-02-02 |
Family
ID=61375527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720512751.0U Active CN206961524U (en) | 2017-05-09 | 2017-05-09 | Nuclear power plant steam air tapping equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN206961524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068214A (en) * | 2017-05-09 | 2017-08-18 | 中广核研究院有限公司 | Nuclear power plant steam air tapping equipment and secondary circuit pressure method for releasing |
| CN109712733A (en) * | 2018-12-05 | 2019-05-03 | 深圳中广核工程设计有限公司 | The safety level function control system and method for nuclear power station atmospheric steam dump system |
-
2017
- 2017-05-09 CN CN201720512751.0U patent/CN206961524U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068214A (en) * | 2017-05-09 | 2017-08-18 | 中广核研究院有限公司 | Nuclear power plant steam air tapping equipment and secondary circuit pressure method for releasing |
| CN107068214B (en) * | 2017-05-09 | 2024-03-26 | 中广核研究院有限公司 | Nuclear power plant steam atmosphere discharge device and two-loop pressure release method |
| CN109712733A (en) * | 2018-12-05 | 2019-05-03 | 深圳中广核工程设计有限公司 | The safety level function control system and method for nuclear power station atmospheric steam dump system |
| CN109712733B (en) * | 2018-12-05 | 2020-11-06 | 深圳中广核工程设计有限公司 | Safety level function control system and method for steam atmospheric emission system of nuclear power station |
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