CN102881341A - 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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- CN102881341A CN102881341A CN2012103776617A CN201210377661A CN102881341A CN 102881341 A CN102881341 A CN 102881341A CN 2012103776617 A CN2012103776617 A CN 2012103776617A CN 201210377661 A CN201210377661 A CN 201210377661A CN 102881341 A CN102881341 A CN 102881341A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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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 the nuclear power field, relate in particular to the method that a kind of volumetric expansion assembly that uses and a kind of gravity peace that improves in the safety injection system are annotated pressure head in nuclear power station.
Background technology
The safety injection system that uses in the nuclear power station is called again emergence core stacking cool system, its major function comprises: when a circuit system breaks when causing loss of-coolant accident (LOCA), safety injection system guarantees to flood and cool off reactor core to the reactor core water filling, prevent that reactor core from melting, and the integrality that keeps reactor core.
In addition, in the non-active nuclear power station of three generations (for example AP1000), can utilize Core makeup tank (CMT), peace to annotate case (ACC), the built-in material-changing water tank of containment (IPWST) etc. to the reactor core water filling, these water flood operations all adopt non-enabling fashion, and the gravity peace is annotated the important parameter that pressure head is the operation of execution peace notes.
Summary of the invention
Thereby the present invention mainly is intended to improve peace annotates the security that pressure head further improves safety injection system.
According to an aspect of the present invention, a kind of volumetric expansion assembly that uses in nuclear power station has been proposed, comprise: the volumetric expansion device, be arranged in the fluid container of nuclear power station, described volumetric expansion device is suitable for expanding to improve the liquid level in the described fluid container or improve pressure in the described fluid container in described fluid container based on trigger pip.
Favourable, with non-enabling fashion so that described volumetric expansion device expand.
Further, described volumetric expansion device comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container communicates with described high-pressure gas storage vessels by valve; Based on described trigger pip, described valve be unlocked and so that described volumetric expansion volume of a container expand.Favourable, the speed of expansion of described volumetric expansion is by the aperture control of valve.
Optionally, utilize the gas of chemical reaction generation so that described volumetric expansion device generation volumetric expansion.Further, described volumetric expansion device comprises the first reaction vessel that accommodates the first reactant and the second reaction vessel that accommodates the second reactant, described the first reaction vessel and described the second reaction vessel communicate by valve, the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, wherein, based on described trigger pip, described valve is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, expand at least in described the first reaction vessel and described the second reaction vessel at least one of a large amount of gases of generation.Optionally, described volumetric expansion device comprises the first reaction vessel that accommodates the first reactant and the second reaction vessel that accommodates the second reactant, described the first reaction vessel and described the second reaction vessel communicate by valve, the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, in the first reaction vessel and the second reaction vessel at least one is provided with exhausr port, wherein, based on described trigger pip, described valve is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, a large amount of gases of generation enter the inner space of volumetric expansion device with the described volumetric expansion device that expands through described exhausr port.Favourable, the speed of expansion of described volumetric expansion is by the aperture control of valve.
Favourable, described volumetric expansion assembly also comprises stop means, described stop means limits position and/or the shape of described volumetric expansion device after volumetric expansion.
Favourable, described volumetric expansion assembly uses in the presurized water reactor safety injection system.
In above-mentioned volumetric expansion assembly, favourable, described volumetric expansion device is arranged in the described fluid container, and described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC), containment, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.Favourable, described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the fluid container, peace beam speed that liquid flows out described fluid container, described fluid container inside and the low liquid level signal.
According to a second aspect of the invention, proposed the method that a kind of gravity peace that improves in the nuclear power station safety injection system is annotated pressure head, may further comprise the steps: in the bottom of liquid container the volumetric expansion device is set; Based on trigger pip so that described volumetric expansion device in described liquid container, expand with the liquid level in the described liquid container that raises.
According to a third aspect of the invention we, proposed the method that a kind of gravity peace that improves in the nuclear power station safety injection system is annotated pressure head, may further comprise the steps: the bottom at a plurality of liquid containers of nuclear power station arranges respectively a plurality of volumetric expansion devices; Based on trigger pip so that at least one described volumetric expansion device in corresponding liquid container, expand with the liquid level in the rising respective liquid container.Thus, can be used in combination simultaneously a plurality of volumetric expansion devices.
In said method, favourable, described volumetric expansion device comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container communicates with described high-pressure gas storage vessels by valve; So that the step that described volumetric expansion device expands in described liquid container comprises the described valve of unlatching so that the expansion of described volumetric expansion volume of a container.Further, control the aperture of described invention with the speed of expansion of control volume expansion vessel.
In said method, optional, so that the step that described volumetric expansion device expands in described liquid container comprises that the gas that utilizes the chemical reaction generation is so that described volumetric expansion device generation volumetric expansion.
In said method, optional, so that the step that described volumetric expansion device expands in described liquid container comprises the unlatching air pump and supplies with so that the gas that described volumetric expansion device volume expands in described volumetric expansion device.Favourable, the running of regulating described air pump is with in the aeration speed of controlling described volumetric expansion device, aeration quantity, the charge pressure at least one.
In said method, described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC), containment, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
In said method, described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside and the low liquid level signal.
According to a forth aspect of the invention, proposed the method that a kind of gravity peace that improves in the nuclear power station safety injection system is annotated pressure head, may further comprise the steps: the bottom at a plurality of liquid containers of nuclear power station arranges respectively a plurality of volumetric expansion devices; Based on trigger pip so that at least two described volumetric expansion devices trigger in corresponding liquid container sequentially expands with the liquid level in the rising respective liquid container.
Description of drawings
Fig. 1 is the synoptic diagram of volumetric expansion assembly according to an embodiment of the invention, wherein Fig. 1 a shows be not triggered state before expanding of volumetric expansion assembly, Fig. 1 b then shows be triggered state after expanding of this volumetric expansion assembly, in Fig. 1 b, the liquid level in the liquid container raises based on this expansion;
Fig. 2 is the enlarged diagram of the volumetric expansion assembly among Fig. 1;
Fig. 3 is the synoptic diagram of volumetric expansion assembly according to another embodiment of the invention.
Embodiment
The below describes the embodiment of exemplary of the present invention in detail, and the example of embodiment is shown in the drawings, and wherein same or analogous label represents same or analogous element.The embodiment that describes below with reference to accompanying drawing 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 using in nuclear power station (the particularly non-active nuclear power station of the three generations) accident mitigation are that gravity peace is annotated pressure head, flooded liquid level, heat removes.The present invention can optimize above three factors at least to a certain extent, so that nuclear power station is safer.Particularly, utilize technical scheme of the present invention can improve the peace notes pressure head that the gravity peace is annotated, and, because the volumetric expansion meeting occupies the space of the fluid in the fluid container, flood liquid level so can improve, especially can be in post incident improves reactor core flood liquid level.In addition, (for example can also sponge part of waste heat that reactor core produces according to the volumetric expansion assembly of technical scheme of the present invention, when volumetric expansion, according to volumetric expansion assembly of the present invention in addition can also absorb external heat), improve the pressure (annotating case (ACC) inside or other places that need to pressurize of nuclear power station such as peace) of space, place gas etc.
As shown in Fig. 1 a, 1b, the volumetric expansion assembly that uses in nuclear power station comprises: volumetric expansion device 10, be arranged in the fluid container 20, described volumetric expansion device is suitable for expanding (referring to Fig. 1 b) to improve the liquid level in the described fluid container or to improve pressure in the described fluid container in described fluid container based on trigger pip.
Can non-enabling fashion so that described volumetric expansion device 10 expand.Specifically describe as follows:
As shown in Fig. 1 a, 1b, described volumetric expansion device 10 comprises high-pressure gas storage vessels 11 and volumetric expansion container 12, and described volumetric expansion container communicates with described high-pressure gas storage vessels 11 by valve 13; Based on described trigger pip, described valve 13 be unlocked and so that described volumetric expansion volume of a container expand.Favourable, the speed of expansion of described volumetric expansion is by the aperture control of valve, and as shown in Figure 2, this valve 13 is electrically operated valve, can come by the control motor aperture of by-pass valve control 13.But, fully open/closed type valve also can be set.As shown in Fig. 1 b, and to compare among Fig. 1 a, the liquid levels in the liquid container 20 raise because of this volumetric expansion, and liquid level raises corresponding to having improved peace notes pressure head.
Can also utilize the gas of chemical reaction generation so that described volumetric expansion device generation volumetric expansion.As shown in Figure 3, described volumetric expansion device 10 ' comprises the first reaction vessel 11 ' that accommodates the first reactant and the second reaction vessel 12 ' that accommodates the second reactant, described the first reaction vessel 11 ' and described the second reaction vessel 12 ' communicate by valve 13 ', the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, in the first reaction vessel 11 ' and the second reaction vessel 12 ' at least one is provided with exhausr port 14, wherein, based on described trigger pip, described valve 13 ' is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, a large amount of gases of generation enter the inner space of volumetric expansion device with the described volumetric expansion device 10 ' that expands through described exhausr port 14.In Fig. 3, the first reaction vessel and the second reaction vessel all are arranged on volumetric expansion device 10 ' inside, but, the first reaction vessel and the second reaction vessel also can be arranged on the outside of volumetric expansion device 10 ', and via this exhausr port 14 (and additional pipeline) gas that produces are drained into volumetric expansion device 20 inside.Favourable, the speed of expansion of described volumetric expansion is by the aperture control of valve, and as shown in Figure 3, this valve 13 ' is electrically operated valve, can come by the control motor aperture of by-pass valve control 13 '.But, fully open/closed type valve also can be set.
Optionally, the first reaction vessel and the second reaction vessel itself just can consist of the volume expansion gear together.Concrete, described volumetric expansion device comprises the first reaction vessel that accommodates the first reactant and the second reaction vessel that accommodates the second reactant, described the first reaction vessel and described the second reaction vessel communicate by valve, the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, wherein, based on described trigger pip, described valve is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, expand at least in described the first reaction vessel and described the second reaction vessel at least one of a large amount of gases of generation.
Can use following mode to produce a large amount of gases.Can place sodium azide (NaN in the first reaction vessel
3), and can place ammonium nitrate (NH in the second reaction vessel
4NO
3), when these two kinds of materials mixed, decomposition reaction occured rapidly and produces a large amount of gases in meeting, and its chemical equation is as follows:
NaN
3+NH
4NO
3------->N
2+Na+N
2O+H
2O
All right enabling fashion is so that 10 expansions of described volumetric expansion device.Concrete, described volumetric expansion assembly also comprises the air pump (not shown), the outlet of air pump communicates with described volumetric expansion device 10; Based on described trigger pip, described air pump is unlocked and to described volumetric expansion device 10 interior supplies so that the gas that described volumetric expansion device volume expands.Favourable, can control in the aeration speed, aeration quantity, charge pressure of described volumetric expansion device at least one by the running of described air pump.Favourable, can turn round and Exhaust Gas by this air pump, the volumetric expansion device is returned to less volume, for reusing.
Described volumetric expansion assembly also can comprise the stop means (not shown), described stop means limits position and/or the shape of described volumetric expansion device after volumetric expansion, for example, as shown in Fig. 1 b, stop means can 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 the volumetric expansion assembly is fixed on effect in the fluid container.For example, this stop means can be a rigid frame, and the volumetric expansion assembly is limited in expanding in this rigid frame, and is corresponding, this volumetric expansion assembly also can be fixed in this rigid frame, and this rigid frame then can be fixed on the chamber wall of fluid container.
Described volumetric expansion device 10 can be arranged on the bottom of described fluid container 20, and described fluid container 20 is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC), containment in Core makeup tank (CMT), containment sump, the containment.Need to be pointed out that specially, a plurality of volumetric expansion devices 10 can be set, be separately positioned in the different fluid containers, to make up adjusting.
Core makeup tank can be arranged in and be higher than the position that containment is directly injected (DVI) pipe, and the latter's position is near the elevation of bottom of hot arc trunk line.At normal operation period, be full of boron water in the Core makeup tank, keep the operating pressure of reactor coolant loop (RCS) in the case.Core makeup tank is also mainly carried out non-active high-pressure safety injection function under the LOCA accident except finish reactor core emergence compensating water and boronation under non-limit coolant loss accident (LOCA).
Peace is annotated case and is carried out middle pressure peace and annotate, and it is by means of the energy storage of pressure gas, therefore without the requirement of absolute altitude.The casing that peace is annotated case can be arranged on next aspect of Core makeup tank.Peace is annotated most of vessel filling boron water of case, and air cavity pressurizes by covering nitrogen in the case.When nuclear power station normally moved, peace was annotated case by non-return valve and reactor coolant loop isolation, and the outlet that peace is annotated case links to each other with the direct injection-tube of containment.As long as reactor coolant loop pressure drops to the pressure that is lower than in the peace notes case, non-return valve is just opened automatically, and boron water then leans on the non-reactor coolant loop that actively is injected into of nitrogen pressure.The middle pressure injection of peace notes case is penetrated and is mainly tackled large limit coolant loss accident, and after a large amount of forfeitures of the water of reactor coolant loop, peace is annotated the large flow water injection of case can set up rapidly Core cooling.
The built-in material-changing water tank of containment generally is arranged in the aspect under the 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 the case can be injected in the reactor coolant loop under gravity, and the built-in material-changing water tank of containment also links to each other with containment by two direct injection-tubes of containment.Generally speaking, the water yield in the built-in material-changing water tank of containment need to satisfy following requirement: during reactor normally reloads refuelling pool is filled with water to the water level of needs with the operation of reloading; Long-term recirculation cooling period is flooded the bottom of containment after the limit coolant loss accident; Enough low pressure peace beam amount is provided after the limit coolant loss accident and keeps enough inject time.
Peace in the built-in material-changing water tank of above-mentioned containment, peace notes case, Core makeup tank can be carried out containment sump recycle and realize long-term cooling after annotating and operating all end.
Take by fluid container as example as containment sump, before the volumetric expansion device 10 of volumetric expansion assembly expanded, the volume of volumetric expansion assembly was also little, does not affect the operation of containment sump.When accident occured, volumetric expansion device 10, for example, was expand into the decades of times of original volume even hundreds of times, thereby occupies the part water volume in the containment sump by rapid expanding owing to trigger, and improves the liquid level of flooding of reactor core.Producing by chemical reaction in the situation of a large amount of gases, the chemical constitution in the volumetric expansion assembly also may be because pressure release expansion and absorption portion residual heat of nuclear core.Trigger pip can be obtained by sensor.Trigger pip can be the liquid level in the containment sump, when this liquid level is lower than predetermined fluid level, and can be so that this volumetric expansion device 10 expands.
Material-changing water tank or Core makeup tank are example in take fluid container as containment, and before the volumetric expansion device 10 of volumetric expansion assembly expanded, the volume of volumetric expansion assembly was also little, did not affect the operation of the interior material-changing water tank of containment or Core makeup tank.When accident occurs, volumetric expansion device 10 owing to trigger by rapid expanding, for example, expand into the decades of times of original volume even hundreds of times, thereby occupy material-changing water tank or the interior part water volume of Core makeup tank in the containment, improve the liquid level of the interior material-changing water tank of containment or Core makeup tank, annotate pressure head thereby improve peace, and further improve the peace beam speed of material-changing water tank in the containment or the peace beam speed of Core makeup tank.Trigger pip can be obtained by sensor.Trigger pip also can be the liquid level of material-changing water tank in the containment or Core makeup tank, perhaps the peace beam of material-changing water tank or Core makeup tank is fast in the containment, when this liquid level is lower than predetermined fluid level or peace beam speed and is lower than predetermined flow velocity, can be so that this volumetric expansion device 10 expands.
Annotate case as example take fluid container as peace, before the volumetric expansion device 10 of volumetric expansion assembly expanded, the volume of volumetric expansion assembly was also little, does not affect the operation that peace is annotated case.When accident occurs, volumetric expansion device 10 owing to trigger by rapid expanding, for example, expand into the decades of times of original volume even hundreds of times, annotate part water volume in the case thereby occupy peace, improve the liquid level that peace is annotated case, annotate pressure head thereby improve peace, and further improve the peace beam speed that peace is annotated case.Especially annotate in the hypodynamic situation of nitrogen pressure of case internal upper part in peace, the rapid expanding of volumetric expansion device 10 also helps to improve pacifies the pressure of annotating in the case, thereby guarantees the peace beam speed of peace notes case.Trigger pip can be obtained by sensor.Trigger pip also can be annotated the peace beam speed of case or pacify the pressure of annotating in the case for peace, when the pressure in peace beam speed is lower than predetermined flow velocity or peace notes case is lower than predetermined pressure, and can be so that this volumetric expansion device 10 expands.
Trigger pip can also need to be carried out the trouble-signal that peace is annotated operation for the low-pressure signal in core temperature, the voltage stabilizer and low liquid level signal and other, for example the cut of the various sizes of reactor coolant loop (limit coolant loss accident that comprises the trunk line double of bore maximum), main steam line double accident are (under non-limit coolant loss accident, when unavailable or moisturizing was not enough in the normal moisturizing of cvcs (CVS), safety injection system provided high pressure emergence compensating water and boronation.For main steam line double accident, main steam discharges in a large number after the accident, so that the reactor coolant rapid cooling causes reactor coolant to shrink, reactor coolant loop volumetric water loading amount reduces and the reactor core positive reactivity is introduced fast.At this moment, need so that reactor core keeps floodage, and the control reactor core is reactive, the limited reactions heap returns to the peak value of power).
The material of making the volumetric expansion assembly can be the high-temperature resistant rubber material.
Although in above embodiment, the volumetric expansion of volumetric expansion assembly mainly realizes by means of gas, but, also can adopt other mechanical system to realize, for example, this volumetric expansion assembly comprises airtight container and the Compress Spring that holds within it, this Compress Spring is in compressive state when the volumetric expansion assembly is not triggered, thereby the container that holds this Compress Spring also correspondingly is in compressive state or squeezed state, and when the volumetric expansion assembly is triggered, this Compress Spring is released, and this release can cause the corresponding expansion of the internal capacity of airtight container.Mobile in release direction for the ease of Compress Spring, special guide rail can be set so that this release is guided in the sealing container.Release to Compress Spring can utilize electromagnetic action to realize.
The situation of volumetric expansion component application in nuclear power station safety injection system below mainly has been described.
Safety injection system can be the safety injection system of presurized water reactor, volumetric expansion assembly of the present invention also can be applied to other heap types, for example, be arranged in the containment sump of other heap types, for example, can also be arranged in the containment wet-well of boiling-water reactor, when needs flood reactor core, to trigger this volumetric expansion assembly with the liquid level in the lifting melt pit.
The present invention has also proposed the method that a kind of gravity peace that improves in the nuclear power station safety injection system is annotated pressure head, and the method may further comprise the steps: in the bottom of liquid container the volumetric expansion device is set; And based on trigger pip so that described volumetric expansion device in described liquid container, expand with the liquid level in the described liquid container that raises.
The invention allows for a kind of gravity peace that improves in the nuclear power station safety injection system and annotate the method for pressure head, may further comprise the steps: the bottom at a plurality of liquid containers of nuclear power station arranges respectively a plurality of volumetric expansion devices; Based on trigger pip so that at least one described volumetric expansion device triggers in corresponding liquid container sequentially expands with the liquid level in the rising respective liquid container.Thus, can be used in combination simultaneously a plurality of volumetric expansion devices.
Optionally, described volumetric expansion device comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container communicates with described high-pressure gas storage vessels by valve; And so that the step that described volumetric expansion device expands in described liquid container comprise: open described valve and so that described volumetric expansion volume of a container expand.Can control the aperture of described invention with the speed of expansion of control volume expansion vessel.
Optionally, so that the step that described volumetric expansion device expands in described liquid container comprise: utilize gas that chemical reaction produces so that described volumetric expansion device generation volumetric expansion.
Optionally, so that the step that described volumetric expansion device expands in described liquid container comprise: open air pump and in described volumetric expansion device, supply with so that the gas that described volumetric expansion device volume expands.Favourable, the running of regulating described air pump is with in the aeration speed of controlling described volumetric expansion device, aeration quantity, the charge pressure at least one.
In the said method, described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC) in Core makeup tank (CMT), containment sump, the containment.
In the said method, described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside and the low liquid level signal.
It is pointed out that also the liquid level in the above change fluid container, assembly and the method for pressure can be combined with.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can change these embodiment.The scope of application of the present invention is limited by claims and equivalent thereof.
Claims (21)
1. volumetric expansion assembly that uses in nuclear power station comprises:
The volumetric expansion device is arranged in the fluid container of nuclear power station, and described volumetric expansion device is suitable for expanding to improve the liquid level in the described fluid container or improve pressure in the described fluid container in described fluid container based on trigger pip.
2. volumetric expansion assembly according to claim 1, wherein:
With non-enabling fashion so that described volumetric expansion device expand.
3. volumetric expansion assembly according to claim 2, wherein:
Described volumetric expansion device comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container communicates with described high-pressure gas storage vessels by valve;
Based on described trigger pip, described valve be unlocked and so that described volumetric expansion volume of a container expand.
4. volumetric expansion assembly according to claim 3, wherein:
The speed of expansion of described volumetric expansion is by the aperture control of valve.
5. volumetric expansion assembly according to claim 2, wherein:
Utilize the gas of chemical reaction generation so that described volumetric expansion device generation volumetric expansion.
6. volumetric expansion assembly according to claim 5, wherein:
Described volumetric expansion device comprises the first reaction vessel that accommodates the first reactant and the second reaction vessel that accommodates the second reactant, described the first reaction vessel and described the second reaction vessel communicate by valve, the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, wherein, based on described trigger pip, described valve is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, expand at least in described the first reaction vessel and described the second reaction vessel at least one of a large amount of gases of generation.
7. volumetric expansion assembly according to claim 5, wherein:
Described volumetric expansion device comprises the first reaction vessel that accommodates the first reactant and the second reaction vessel that accommodates the second reactant, described the first reaction vessel and described the second reaction vessel communicate by valve, the first reactant is suitable for reacting with described the second reactant and producing a large amount of gases, in the first reaction vessel and the second reaction vessel at least one is provided with exhausr port, wherein, based on described trigger pip, described valve is unlocked and so that the first reactant and described the second reactant react to produce a large amount of gases, a large amount of gases of generation enter the inner space of volumetric expansion device with the described volumetric expansion device that expands through described exhausr port.
8. volumetric expansion assembly according to claim 1, wherein:
Described volumetric expansion assembly also comprises stop means, and described stop means limits position and/or the shape of described volumetric expansion device after volumetric expansion.
9. volumetric expansion assembly according to claim 1, wherein:
Described volumetric expansion assembly uses in the presurized water reactor safety injection system.
10. volumetric expansion assembly according to claim 1, wherein:
Described volumetric expansion device comprises Compress Spring and holds the airtight container of this Compress Spring, is triggered based on described trigger pip and when discharging at described Compress Spring, and the internal capacity of described airtight container is based on the release of this Compress Spring and corresponding expansion.
11. each described volumetric expansion assembly according to claim 1-10, wherein:
Described volumetric expansion device is arranged in the described fluid container, and described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), reactor pressure vessel (RPV), steam generator (SG), peace are annotated case (ACC), containment in Core makeup tank (CMT), containment sump, the containment.
12. volumetric expansion assembly according to claim 11, wherein:
Described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the fluid container, peace beam speed that liquid flows out described fluid container, described fluid container inside and the low liquid level signal.
13. a gravity peace that improves in the nuclear power station safety injection system is annotated the method for pressure head, may further comprise the steps:
Bottom at the liquid container of nuclear power station arranges the volumetric expansion device;
Based on trigger pip so that described volumetric expansion device in described liquid container, expand with the liquid level in the described liquid container that raises.
14. method according to claim 13, wherein:
Described volumetric expansion device comprises high-pressure gas storage vessels and volumetric expansion container, and described volumetric expansion container communicates with described high-pressure gas storage vessels by valve;
So that the step that described volumetric expansion device expands in described liquid container comprises the described valve of unlatching so that the expansion of described volumetric expansion volume of a container.
15. method according to claim 13, wherein:
Control the aperture of described invention with the speed of expansion of control volume expansion vessel.
16. method according to claim 13, wherein:
So that the step that described volumetric expansion device expands in described liquid container comprises that the gas that utilizes the chemical reaction generation is so that described volumetric expansion device generation volumetric expansion.
17. method according to claim 13, wherein:
So that the step that described volumetric expansion device expands in described liquid container comprises the unlatching air pump and supplies with so that the gas that described volumetric expansion device volume expands in described volumetric expansion device.
18. method according to claim 17, wherein:
The running of regulating described air pump is with in the aeration speed of controlling described volumetric expansion device, aeration quantity, the charge pressure at least one.
19. each described method according to claim 13-18, wherein:
Described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), reactor pressure vessel (RPV), steam generator (SG), peace are annotated case (ACC), containment in Core makeup tank (CMT), containment sump, the containment.
20. each described method according to claim 13-18, wherein:
Described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside and the low liquid level signal.
20, method according to claim 19, wherein:
Described trigger pip comprises at least a in low-pressure signal in the pressure, core temperature, voltage stabilizer of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside and the low liquid level signal.
21. a gravity peace that improves in the nuclear power station safety injection system is annotated the method for pressure head, may further comprise the steps:
Bottom at a plurality of liquid containers of nuclear power station arranges respectively a plurality of volumetric expansion devices;
Based on trigger pip so that at least two described volumetric expansion devices trigger in corresponding liquid container sequentially expands with the liquid level in the rising respective liquid container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210377661.7A CN102881341B (en) | 2012-10-08 | 2012-10-08 | Volume expansion component and method for increasing gravity safety injection pressure head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280248A (en) * | 2014-07-09 | 2016-01-27 | 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 safety injection 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 |
| CN110017941A (en) * | 2019-04-19 | 2019-07-16 | 广西防城港核电有限公司 | Pressure oscillation exceeded reason analysis method and processing method |
| CN112216412A (en) * | 2020-09-04 | 2021-01-12 | 国家电投集团科学技术研究院有限公司 | Passive self-adjusting waste heat removal system and 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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| JPH01142497A (en) * | 1987-11-30 | 1989-06-05 | Nippon Atom Ind Group Co Ltd | Decay heat remover for nuclear reactor |
| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280248A (en) * | 2014-07-09 | 2016-01-27 | 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 safety injection 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 |
| CN110017941A (en) * | 2019-04-19 | 2019-07-16 | 广西防城港核电有限公司 | Pressure oscillation exceeded reason analysis method and processing method |
| 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 |
| CN112216412A (en) * | 2020-09-04 | 2021-01-12 | 国家电投集团科学技术研究院有限公司 | Passive self-adjusting waste heat removal system and method and liquid metal reactor |
| 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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| CN102881341B (en) | 2015-04-22 |
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