CN102881341B - Volume expansion component and method for increasing gravity safety injection pressure head - Google Patents
Volume expansion component and method for increasing gravity safety injection pressure head Download PDFInfo
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- CN102881341B CN102881341B CN201210377661.7A CN201210377661A CN102881341B CN 102881341 B CN102881341 B CN 102881341B CN 201210377661 A CN201210377661 A CN 201210377661A CN 102881341 B CN102881341 B CN 102881341B
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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
Abstract
The invention provides a volume expansion component used in a nuclear power plant. The volume expansion component comprises a volume expansion device. The volume expansion device is arranged in a fluid vessel of the nuclear power plant and is adaptable to expansion or contraction in the fluid vessel based on a trigger signal, variable quantity of the volume expansion device is controllable, and the volume expansion device is used for changing liquid level and pressure of fluid vessel space in the fluid vessel. The invention further provides a method for changing gravity safety injection pressure head in a safety injection system of the nuclear power plant. The method includes following steps of arranging a volume change device at the bottom of the liquid vessel; and enabling the volume change device to expand or contract in the liquid vessel so as to change the liquid level in the fluid vessel based the trigger signal so that the safety injection pressure head is changed. By the technical scheme, accidents of the nuclear power plant can be relieved, and safety of the nuclear power plant is improved.
Description
Technical field
The present invention relates to nuclear power field, particularly relate to a kind of a kind of method of volume expansion component of using in nuclear power station and gravity safety injection pressure head improved in safety injection system.
Background technology
The safety injection system used in nuclear power station is called emergence core stacking cool system again, its major function comprises: when primary Ioops system break cause loss of-coolant accident (LOCA) time, safety injection system to reactor core water filling, ensure flood and cool reactor core, prevent reactor core from melting, and keep the integrality of reactor core.
In addition, in the non-active nuclear power station (such as AP1000) of three generations, Core makeup tank (CMT), peace note case (ACC), the built-in material-changing water tank of containment (IPWST) etc. can be utilized to reactor core water filling, these water flood operations all adopt non-enabling fashion, and gravity safety injection pressure head is the important parameter performing the operation of peace note.
Summary of the invention
The present invention is mainly intended to improve peace note pressure head thus the security improving safety injection system further.
According to an aspect of the present invention, propose a kind of volume expansion component used in nuclear power station, comprise: volume expansion equipment, be arranged in the fluid container of nuclear power station, described volume expansion equipment is suitable in described fluid container, expanding the liquid level improved in described fluid container or the pressure improved in described fluid container based on trigger pip.
Favourable, with non-enabling fashion, described volume expansion equipment is expanded.
Further, described volume expansion equipment comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container is communicated with described high-pressure gas storage vessels by valve; Based on described trigger pip, described valve is unlocked and described volumetric expansion volume of a container is expanded.Favourable, the speed of expansion of described volumetric expansion is controlled by the aperture of valve.
Optionally, the gas utilizing chemical reaction to produce makes described volume expansion equipment generation volumetric expansion.Further, described volume expansion equipment comprises the first reaction vessel accommodating the first reactant and the second reaction vessel accommodating the second reactant, described first reaction vessel and described second reaction vessel are communicated by valve, first reactant is suitable for reacting with described second reactant and producing a large amount of gas, wherein, based on described trigger pip, described valve is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, produce a large amount of gases at least expand in described first reaction vessel and described second reaction vessel at least one.Optionally, described volume expansion equipment comprises the first reaction vessel accommodating the first reactant and the second reaction vessel accommodating the second reactant, described first reaction vessel and described second reaction vessel are communicated by valve, first reactant is suitable for reacting with described second reactant and producing a large amount of gas, at least one in first reaction vessel and the second reaction vessel is provided with exhausr port, wherein, based on described trigger pip, described valve is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, the a large amount of gases produced enter the inner space of volume expansion equipment with the described volume expansion equipment that expands through described exhausr port.Favourable, the speed of expansion of described volumetric expansion is controlled by the aperture of valve.
Favourable, described volume expansion component also comprises stop means, and described stop means limits the position of described volume expansion equipment after volumetric expansion and/or shape.
Favourable, described volume expansion component is used in presurized water reactor safety injection system.
In above-mentioned volume expansion component, favourable, described volume expansion equipment is arranged in described fluid container, and described fluid container be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, peace note case (ACC), containment, reactor pressure vessel (RPV), steam generator (SG).Favourable, described trigger pip comprises liquid level in fluid container, liquid flows out the peace beam speed of described fluid container, the low-pressure signal in the pressure of described fluid container inside, core temperature, voltage stabilizer and at least one in low liquid level signal.
According to a second aspect of the invention, propose a kind of method of the gravity safety injection pressure head improved in nuclear power station safety injection system, comprise the following steps: volume expansion equipment is set in the bottom of liquid container; Described volume expansion equipment is made to expand to raise the liquid level in described liquid container in described liquid container based on trigger pip.
According to a third aspect of the invention we, propose a kind of method of the gravity safety injection pressure head improved in nuclear power station safety injection system, comprise the following steps: multiple volume expansion equipment is set respectively in the bottom of multiple liquid containers of nuclear power station; Volume expansion equipment described at least one is made to expand to raise the liquid level in respective liquid container in corresponding liquid container based on trigger pip.Thus, multiple volume expansion equipment can be combinationally used simultaneously.
In the above-mentioned methods, favourable, described volume expansion equipment comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container is communicated with described high-pressure gas storage vessels by valve; The step that described volume expansion equipment expands in described liquid container is made to comprise the described valve of unlatching and described volumetric expansion volume of a container is expanded.Further, the aperture of described valve is controlled to control the speed of expansion of volume expansion vessel.
In the above-mentioned methods, optionally, make step that described volume expansion equipment expands in described liquid container comprise the gas utilizing chemical reaction to produce and make described volume expansion equipment generation volumetric expansion.
In the above-mentioned methods, optionally, the step that described volume expansion equipment expands in described liquid container is made to comprise unlatching air pump and in described volume expansion equipment, supply the gas making described volume expansion equipment volumetric expansion.Favourable, regulate the running of described air pump to control at least one in the aeration speed of described volume expansion equipment, aeration quantity, charge pressure.
In the above-mentioned methods, described fluid container be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, peace note case (ACC), containment, reactor pressure vessel (RPV), steam generator (SG).
In the above-mentioned methods, the low-pressure signal in the pressure of the peace beam speed that described trigger pip comprises liquid level in liquid container, liquid flows out described liquid container, described liquid container, core temperature, voltage stabilizer and at least one in low liquid level signal.
According to a forth aspect of the invention, propose a kind of method of the gravity safety injection pressure head improved in nuclear power station safety injection system, comprise the following steps: multiple volume expansion equipment is set respectively in the bottom of multiple liquid containers of nuclear power station; Based on trigger pip, at least two described volume expansion equipment are triggered in corresponding liquid container sequentially to expand to raise the liquid level in respective liquid container.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of volume expansion component according to an embodiment of the invention, wherein Fig. 1 a show volume expansion component be not triggered expand before state, Fig. 1 b then show this volume expansion component be triggered expand after state, in Figure 1b, the liquid level in liquid container raises based on this expansion;
Fig. 2 is the enlarged diagram of the volume expansion component in Fig. 1;
Fig. 3 is the schematic diagram of volume expansion component according to another embodiment of the invention.
Embodiment
Be described below in detail the embodiment of exemplary of the present invention, the example of embodiment is shown in the drawings, and wherein same or analogous label represents same or analogous element.Below with reference to the accompanying drawings the embodiment described is exemplary, is intended to explain the present invention, and can not be interpreted as limitation of the present invention.
Three important factor in order used in nuclear power station (particularly the non-active nuclear power station of three generations) accident mitigation are gravity safety injection pressure head, flood liquid level, heat removes.The present invention at least can optimize above three factors to a certain extent, makes nuclear power station safer.Particularly, utilize technical scheme of the present invention can improve the peace note pressure head of gravity safety injection, and, because volumetric expansion can occupy the space of the fluid in fluid container, flood liquid level so can improve, especially can post incident improve heap in-core flood liquid level.In addition, the part of waste heat of reactor core generation can also be sponged (such as according to the volume expansion component of technical scheme of the present invention, when volumetric expansion, even external heat can also be absorbed according to volume expansion component of the present invention), improve the pressure (as peace notes the place of case (ACC) inside or other needs pressurizations of nuclear power station) etc. of place space gases.
As shown in Fig. 1 a, 1b, the volume expansion component used in nuclear power station comprises: volume expansion equipment 10, be arranged in fluid container 20, described volume expansion equipment is suitable in described fluid container, expanding (see Fig. 1 b) with the liquid level improved in described fluid container or the pressure improved in described fluid container based on trigger pip.
Can described volume expansion equipment 10 be expanded non-enabling fashion.Specifically describe as follows:
As shown in Fig. 1 a, 1b, described volume expansion equipment 10 comprises high-pressure gas storage vessels 11 and volumetric expansion container 12, and described volumetric expansion container is communicated with described high-pressure gas storage vessels 11 by valve 13; Based on described trigger pip, described valve 13 is unlocked and described volumetric expansion volume of a container is expanded.Favourable, the speed of expansion of described volumetric expansion is controlled by the aperture of valve, and as shown in Figure 2, this valve 13 is electrically operated valve, can carry out the aperture of by-pass valve control 13 by controlling motor.But, fully open/closed type valve also can be set.As shown in Figure 1 b, compared with Fig. 1 a, the liquid level in liquid container 20 raises because of this volumetric expansion, and liquid level raises corresponding to improve peace note pressure head.
The gas that chemical reaction can also be utilized to produce makes described volume expansion equipment generation volumetric expansion.As shown in Figure 3, described volume expansion equipment 10 ' comprises the first reaction vessel 11 ' accommodating the first reactant and the second reaction vessel 12 ' accommodating the second reactant, described first reaction vessel 11 ' and described second reaction vessel 12 ' are communicated by valve 13 ', first reactant is suitable for reacting with described second reactant and producing a large amount of gas, at least one in first reaction vessel 11 ' and the second reaction vessel 12 ' is provided with exhausr port 14, wherein, based on described trigger pip, described valve 13 ' is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, the a large amount of gases produced enter the inner space of volume expansion equipment with the described volume expansion equipment 10 ' that expands through described exhausr port 14.In figure 3, it is inner that first reaction vessel and the second reaction vessel are all arranged on volume expansion equipment 10 ', but, first reaction vessel and the second reaction vessel also can be arranged on the outside of volume expansion equipment 10 ', and via this exhausr port 14 (and additional pipeline), the gas of generation are drained into volume expansion equipment 20 inside.Favourable, the speed of expansion of described volumetric expansion is controlled by the aperture of valve, and as shown in Figure 3, this valve 13 ' is electrically operated valve, can carry out the aperture of by-pass valve control 13 ' by controlling motor.But, fully open/closed type valve also can be set.
Optionally, just volume expansion equipment can be formed together with the first reaction vessel and the second reaction vessel itself.Concrete, described volume expansion equipment comprises the first reaction vessel accommodating the first reactant and the second reaction vessel accommodating the second reactant, described first reaction vessel and described second reaction vessel are communicated by valve, first reactant is suitable for reacting with described second reactant and producing a large amount of gas, wherein, based on described trigger pip, described valve is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, produce a large amount of gases at least expand in described first reaction vessel and described second reaction vessel at least one.
Can use as under type produces a large amount of gas.Sodium azide (NaN can be placed in first reaction vessel
3), and ammonium nitrate (NH can be placed in the second reaction vessel
4nO
3), when this two kinds of material mixing, can rapidly decomposition reaction occur and produce a large amount of gas, its chemical equation be as follows:
NaN
3+NH
4NO
3------->N
2+Na+N
2O+H
2O
Can also described volume expansion equipment 10 be expanded enabling fashion.Concrete, described volume expansion component also comprises air pump (not shown), and gas delivery side of pump communicates with described volume expansion equipment 10; Based on described trigger pip, described air pump is unlocked and in described volume expansion equipment 10, supplies the gas making described volume expansion equipment volumetric expansion.Favourable, can by the running of described air pump control in the aeration speed of described volume expansion equipment, aeration quantity, charge pressure at least one.Favourable, can be operated and Exhaust Gas by this air pump, so that volume expansion equipment is returned to less volume, for reusing.
Described volume expansion component also can comprise stop means (not shown), described stop means limits the position of described volume expansion equipment after volumetric expansion and/or shape, such as, as shown in Figure 1 b, stop means may be used for the direction of the volume expansion of defined volume expansion vessel 12, the position of restricted volume expansion vessel 12 and shape.This stop means can be adjustable telescopic device.Stop means can also play effect volume expansion component be fixed in fluid container.Such as, this stop means can be a rigid frame, and volume expansion component is limited in expanding in this rigid frame, accordingly, this volume expansion component also can be fixed in this rigid frame, and this rigid frame then can be fixed on the chamber wall of fluid container.
Described volume expansion equipment 10 can be arranged on the bottom of described fluid container 20, and described fluid container 20 be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, peace note case (ACC), containment.Need specially it is noted that multiple volume expansion equipment 10 can be arranged, be separately positioned in different fluid containers, regulate to carry out combination.
Core makeup tank can be arranged in the position of directly injecting (DVI) pipe higher than containment, and the position of the latter is close to the elevation of bottom of hot arc main pipeline.At normal operation period, in Core makeup tank, be full of boron water, in case, keep the operating pressure of reactor coolant loop (RCS).Core makeup tank except completing reactor core emergence compensating water and boronation under non-limit coolant loss accident (LOCA), and non-active high-pressure safety injection function under main execution LOCA accident.
Peace note case carries out middle pressure peace note, and it is by means of the energy storage of pressure gas, therefore without the requirement of absolute altitude.The casing of peace note case can be arranged in next aspect of Core makeup tank.Peace note case most of vessel filling boron water, and in case air cavity by covering nitrogen pressurization.When nuclear power station normally runs, peace note case is isolated by non-return valve and reactor coolant loop, and the outlet of peace note case is connected with the direct injection-tube of containment.As long as reactor coolant loop pressure drops to lower than the pressure in peace note case, non-return valve is just opened automatically, and boron water is then injected into reactor coolant loop by nitrogen pressure is non-actively.The middle pressure injection of peace note case is penetrated and is mainly tackled large limit coolant loss accident, and after the water of reactor coolant loop is lost in a large number, the large discharge water filling of peace note case can set up Core cooling rapidly.
The built-in material-changing water tank of containment is generally arranged in the aspect under containment operation platform, the bottom of containment inner water-tank is higher than the absolute altitude of reactor coolant loop loop, after the enough pressure releases of reactor coolant loop, boron water in case can be injected in reactor coolant loop under gravity, and the built-in material-changing water tank of containment is also connected with containment by two direct injection-tubes of containment.Generally speaking, the water yield demand fulfillment in the built-in material-changing water tank of containment requires as follows: during reactor normally reloads, refuelling pool is filled with water to the water level of needs to carry out operation of reloading; After limit coolant loss accident, long-term recirculation cooling period floods the bottom of containment; Enough low pressure peace beam amounts are provided after limit coolant loss accident and keep enough inject time.
After peace note operation in the built-in material-changing water tank of above-mentioned containment, peace note case, Core makeup tank all terminates, containment sump recycle can be performed to realize long-term cooling.
Take fluid container as containment sump be example, before the volume expansion equipment 10 of volume expansion component expands, the volume of volume expansion component is also little, does not affect the operation of containment sump.When a fault occurs, volume expansion equipment 10 is expanded quickly due to triggering, such as, expand into the decades of times even hundreds of times of original volume, thus occupies the part water volume in containment sump, and that improves reactor core floods liquid level.When producing a large amount of gas by chemical reaction, the chemical composition in volume expansion component also may due to pressure release expansion absorption portion residual heat of nuclear core.Trigger pip can be obtained by sensor.Trigger pip can be the liquid level in containment sump, when this liquid level is lower than predetermined fluid level, this volume expansion equipment 10 can be made to expand.
Be that in containment, material-changing water tank or Core makeup tank are example with fluid container, before the volume expansion equipment 10 of volume expansion component expands, the volume of volume expansion component is also little, does not affect the operation of material-changing water tank or Core makeup tank in containment.When a fault occurs, volume expansion equipment 10 is expanded quickly due to triggering, such as, expand into the decades of times even hundreds of times of original volume, thus the part water volume occupied in material-changing water tank in containment or Core makeup tank, improve the liquid level of material-changing water tank or Core makeup tank in containment, thus improve peace note pressure head, and improve the peace beam speed of material-changing water tank in containment or the peace beam speed of Core makeup tank further.Trigger pip can be obtained by sensor.Trigger pip also can be the liquid level of material-changing water tank or Core makeup tank in containment, or the peace beam speed of material-changing water tank or Core makeup tank in containment, in this liquid level lower than predetermined fluid level or when pacifying beam speed lower than predetermined flow velocity, this volume expansion equipment 10 can be made to expand.
Take fluid container as peace note case be example, before the volume expansion equipment 10 of volume expansion component expands, the volume of volume expansion component is also little, does not affect the operation of peace note case.When a fault occurs, volume expansion equipment 10 is expanded quickly due to triggering, such as, expand into the decades of times even hundreds of times of original volume, thus occupy the part water volume in peace note case, improve the liquid level of peace note case, thus improve peace note pressure head, and improve the peace beam speed of peace note case further.Especially, in the hypodynamic situation of nitrogen pressure of peace note case internal upper part, the rapid expanding of volume expansion equipment 10 also contributes to improving the pressure in peace note case, thus ensures the peace beam speed of peace note case.Trigger pip can be obtained by sensor.Trigger pip also can for peace note case peace beam speed or peace note case in pressure, pacify beam speed lower than predetermined flow velocity or peace note case in pressure lower than predetermined pressure time, this volume expansion equipment 10 can be made to expand.
Trigger pip can also be low-pressure signal in core temperature, voltage stabilizer and low liquid level signal and other need to perform the trouble-signal of peace note operation, the cut (comprising the limit coolant loss accident of the maximum main pipeline double of bore) of the various sizes of such as reactor coolant loop, main steam line double accident are (under non-limit coolant loss accident, when the normal moisturizing of cvcs (CVS) is unavailable or moisturizing is not enough, safety injection system provides high pressure emergence compensating water and boronation.For main steam line double accident, after accident, main steam discharges in a large number, makes reactor coolant rapid cooling, causes reactor coolant to shrink, and reactor coolant loop volumetric water loading amount reduces and reactor core positive reactivity is introduced fast.Now, need to make reactor core keep floodage, and control reactor core reactivity, limited reactions heap returns to the peak value of power).
The material manufacturing volume expansion component can be high-temperature resistant rubber material.
Although in the embodiment above, the volumetric expansion of volume expansion component mainly realizes by means of gas, but, also other mechanical system can be adopted to realize, such as, the Compress Spring that this volume expansion component comprises airtight container and holds within it, this Compress Spring is in compressive state when volume expansion component is not triggered, thus the container holding this Compress Spring is also correspondingly in compressive state or squeezed state, and when volume expansion component is triggered, this Compress Spring is released, and this release can cause the corresponding expansion of the internal capacity of airtight container.Move in the releasing direction for the ease of Compress Spring, special guide rail can be set in sealing container to guide this release.Electromagnetic action can be utilized to realize the release of Compress Spring.
Below mainly describe volume expansion component and be applied to situation in nuclear power station safety injection system.
Safety injection system can be the safety injection system of presurized water reactor, volume expansion component of the present invention also can be applied to other heap-type, such as, be arranged in the containment sump of other heap-type, such as, can also be arranged in the containment wet-well of boiling-water reactor, to trigger this volume expansion component when needing to flood reactor core with the liquid level in lifting melt pit.
Present invention also proposes a kind of method of the gravity safety injection pressure head improved in nuclear power station safety injection system, the method comprises the following steps: arrange volume expansion equipment in the bottom of liquid container; And make described volume expansion equipment expand to raise the liquid level in described liquid container in described liquid container based on trigger pip.
The invention allows for a kind of method of the gravity safety injection pressure head improved in nuclear power station safety injection system, comprise the following steps: multiple volume expansion equipment is set respectively in the bottom of multiple liquid containers of nuclear power station; Based on trigger pip, volume expansion equipment described at least one is triggered in corresponding liquid container sequentially to expand to raise the liquid level in respective liquid container.Thus, multiple volume expansion equipment can be combinationally used simultaneously.
Optionally, described volume expansion equipment comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container is communicated with described high-pressure gas storage vessels by valve; And the step that described volume expansion equipment expands in described liquid container is comprised: open described valve and described volumetric expansion volume of a container is expanded.The aperture of described valve can be controlled to control the speed of expansion of volume expansion vessel.
Optionally, the step that described volume expansion equipment expands in described liquid container is comprised: the gas utilizing chemical reaction to produce makes described volume expansion equipment generation volumetric expansion.
Optionally, the step that described volume expansion equipment expands in described liquid container is comprised: open air pump and in described volume expansion equipment, supply the gas making described volume expansion equipment volumetric expansion.Favourable, regulate the running of described air pump to control at least one in the aeration speed of described volume expansion equipment, aeration quantity, charge pressure.
In said method, described fluid container be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, peace note case (ACC).
In said method, the low-pressure signal in the pressure of the peace beam speed that described trigger pip comprises liquid level in liquid container, liquid flows out described liquid container, described liquid container, core temperature, voltage stabilizer and at least one in low liquid level signal.
Also it is pointed out that assembly and the method for the liquid level in above alter container, pressure can be combined.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can change these embodiments without departing from the principles and spirit of the present invention.The scope of application of the present invention is by claims and equivalents thereof.
Claims (22)
1. the volume expansion component used in nuclear power station, comprising:
Volume expansion equipment, is arranged in the fluid container of nuclear power station, and described volume expansion equipment is suitable in described fluid container, expanding the liquid level improved in described fluid container or the pressure improved in described fluid container based on trigger pip.
2. volume expansion component according to claim 1, wherein:
With non-enabling fashion, described volume expansion equipment is expanded.
3. volume expansion component according to claim 2, wherein:
Described volume expansion equipment comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container is communicated with described high-pressure gas storage vessels by valve;
Based on described trigger pip, described valve is unlocked and described volumetric expansion volume of a container is expanded.
4. volume expansion component according to claim 3, wherein:
The speed of expansion of described volumetric expansion is controlled by the aperture of valve.
5. volume expansion component according to claim 2, wherein:
The gas utilizing chemical reaction to produce makes described volume expansion equipment generation volumetric expansion.
6. volume expansion component according to claim 5, wherein:
Described volume expansion equipment comprises the first reaction vessel accommodating the first reactant and the second reaction vessel accommodating the second reactant, described first reaction vessel and described second reaction vessel are communicated by valve, first reactant is suitable for reacting with described second reactant and producing a large amount of gas, wherein, based on described trigger pip, described valve is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, produce a large amount of gases at least expand in described first reaction vessel and described second reaction vessel at least one.
7. volume expansion component according to claim 5, wherein:
Described volume expansion equipment comprises the first reaction vessel accommodating the first reactant and the second reaction vessel accommodating the second reactant, described first reaction vessel and described second reaction vessel are communicated by valve, first reactant is suitable for reacting with described second reactant and producing a large amount of gas, at least one in first reaction vessel and the second reaction vessel is provided with exhausr port, wherein, based on described trigger pip, described valve is unlocked and makes the first reactant and described second reactant react to produce a large amount of gas, the a large amount of gases produced enter the inner space of volume expansion equipment with the described volume expansion equipment that expands through described exhausr port.
8. volume expansion component according to claim 1, wherein:
Described volume expansion component also comprises stop means, and described stop means limits the position of described volume expansion equipment after volumetric expansion and/or shape.
9. volume expansion component according to claim 1, wherein:
Described volume expansion component is used in presurized water reactor safety injection system.
10. volume expansion component according to claim 1, wherein:
Described volume expansion equipment comprises Compress Spring and holds the airtight container of this Compress Spring, when described Compress Spring is triggered based on described trigger pip and discharges, and the corresponding expansion based on the release of this Compress Spring of the internal capacity of described airtight container.
11. volume expansion component according to any one of claim 1-10, wherein:
Described volume expansion equipment is arranged in described fluid container, and described fluid container be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, reactor pressure vessel (RPV), steam generator (SG), peace note case (ACC), containment.
12. volume expansion component according to claim 11, wherein:
Low-pressure signal in the pressure of the peace beam speed that described trigger pip comprises liquid level in fluid container, liquid flows out described fluid container, described fluid container inside, core temperature, voltage stabilizer and at least one in low liquid level signal.
13. 1 kinds of methods improving the gravity safety injection pressure head in nuclear power station safety injection system, comprise the following steps:
In the bottom of the liquid container of nuclear power station, volume expansion equipment is set;
Described volume expansion equipment is made to expand to raise the liquid level in described liquid container in described liquid container based on trigger pip.
14. methods according to claim 13, wherein:
Described volume expansion equipment comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container is communicated with described high-pressure gas storage vessels by valve;
The step that described volume expansion equipment expands in described liquid container is made to comprise the described valve of unlatching and described volumetric expansion volume of a container is expanded.
15. methods according to claim 14, wherein:
Control the aperture of described valve to control the speed of expansion of volume expansion vessel.
16. methods according to claim 13, wherein:
Make step that described volume expansion equipment expands in described liquid container comprise the gas utilizing chemical reaction to produce and make described volume expansion equipment generation volumetric expansion.
17. methods according to claim 13, wherein:
The step that described volume expansion equipment expands in described liquid container is made to comprise unlatching air pump and in described volume expansion equipment, supply the gas making described volume expansion equipment volumetric expansion.
18. methods according to claim 17, wherein:
Regulate the running of described air pump to control at least one in the aeration speed of described volume expansion equipment, aeration quantity, charge pressure.
19. methods according to any one of claim 13-18, wherein:
Described fluid container be nuclear power station with at least one in lower component: material-changing water tank (IRWST) in Core makeup tank (CMT), containment sump, containment, reactor pressure vessel (RPV), steam generator (SG), peace note case (ACC), containment.
20. methods according to any one of claim 13-18, wherein:
Low-pressure signal in the pressure of the peace beam speed that described trigger pip comprises liquid level in liquid container, liquid flows out described liquid container, described liquid container, core temperature, voltage stabilizer and at least one in low liquid level signal.
21. methods according to claim 19, wherein:
Low-pressure signal in the pressure of the peace beam speed that described trigger pip comprises liquid level in liquid container, liquid flows out described liquid container, described liquid container, core temperature, voltage stabilizer and at least one in low liquid level signal.
22. 1 kinds of methods improving the gravity safety injection pressure head in nuclear power station safety injection system, comprise the following steps:
In the bottom of multiple liquid containers of nuclear power station, multiple volume expansion equipment is set respectively;
Based on trigger pip, at least two described volume expansion equipment are triggered in corresponding liquid container sequentially to expand to raise the liquid level in respective liquid container.
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| CN105280248B (en) * | 2014-07-09 | 2018-06-26 | 国核华清（北京）核电技术研发中心有限公司 | Passive pressure accumulation safety injection system and passive pressure accumulation peace injecting method |
| CN107393612A (en) * | 2017-07-31 | 2017-11-24 | 江苏华洋新思路能源装备股份有限公司 | The passive opposite opened exhaust cap of material-changing water tank built in nuclear power generating sets containment |
| CN110017941B (en) * | 2019-04-19 | 2021-04-16 | 广西防城港核电有限公司 | Method for analyzing and processing reasons of overproof pressure fluctuation |
| CN112216412B (en) * | 2020-09-04 | 2023-11-03 | 国家电投集团科学技术研究院有限公司 | Passive self-regulating waste heat lead-out system, method and liquid metal reactor |
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| CN201540746U (en) * | 2009-12-11 | 2010-08-04 | 中核武汉核电运行技术股份有限公司 | Air bag drainage arrangement in the main pipe of the reactor pressure vessel |
| CN102483963A (en) * | 2009-09-08 | 2012-05-30 | 株式会社东芝 | Nuclear reactor containment vessel and nuclear power plant using same |
| CN202976863U (en) * | 2012-10-08 | 2013-06-05 | 国家核电技术有限公司 | Component with volume expansion |
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| JPH0799399B2 (en) * | 1987-11-30 | 1995-10-25 | 株式会社東芝 | Decay heat removal device for nuclear reactor |
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| CN102483963A (en) * | 2009-09-08 | 2012-05-30 | 株式会社东芝 | Nuclear reactor containment vessel and nuclear power plant using same |
| CN201540746U (en) * | 2009-12-11 | 2010-08-04 | 中核武汉核电运行技术股份有限公司 | Air bag drainage arrangement in the main pipe of the reactor pressure vessel |
| CN202976863U (en) * | 2012-10-08 | 2013-06-05 | 国家核电技术有限公司 | Component with volume expansion |
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