CN102903400A - Volume variable assembly, pressure changing assembly, and pressure/fluid level changing method - Google Patents
Volume variable assembly, pressure changing assembly, and pressure/fluid level changing method Download PDFInfo
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- CN102903400A CN102903400A CN2012103776636A CN201210377663A CN102903400A CN 102903400 A CN102903400 A CN 102903400A CN 2012103776636 A CN2012103776636 A CN 2012103776636A CN 201210377663 A CN201210377663 A CN 201210377663A CN 102903400 A CN102903400 A CN 102903400A
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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 variable assembly used in a nuclear power station, comprising a volume changing unit arranged in a fluid container. The volume variable unit is suitable for expansion or contraction in the fluid container based on trigger signals, and the variance is controllable, thus the volume variable unit is used for changing the fluid level in the container and the pressure in the container. The invention further provides a method for changing a gravity safety injection pressure head in the nuclear power station safety injection system, comprising the following steps: arranging the volume variable unit at the bottom of the fluid container; allowing the volume changing unit to expand or contract in the fluid container based on the trigger signals to change the fluid level in the fluid container, so as to change the safety injection pressure head. According to the invention, nuclear power station safety accident can be alleviated, and the safety of the nuclear power station is raised.
Description
Technical field
The present invention relates to the nuclear power field, relate in particular to variable volume assembly, the method for adjusting the liquid level in the liquid container in the nuclear power station in nuclear power station, used, the liquid level change assembly of adjusting method, the pressure change assembly that in the fluid container of nuclear power station, uses of the pressure in the fluid container in the nuclear power station and in the liquid container of nuclear power station, using.
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, therefore, there are the needs that in emergency circumstances further improve peace notes pressure head.
In addition, also there are the needs of in emergency circumstances further adjusting the pressure/liquid level in the fluid container in the nuclear power station.
Summary of the invention
For in case of emergency for example in security incident, provide further adjusting to the pressure in the fluid container of nuclear power station, liquid level etc. with the alleviation accident, the present invention is proposed.
According to an aspect of the present invention, proposed a kind of variable volume assembly that in nuclear power station, uses, having comprised: air pump; The variable volume device, be arranged in the fluid container, wherein, described air pump based on start trigger signal with to described variable volume unit feeding gas and so that described variable volume device expands the to raise liquid level in the described fluid container or increase pressure in the described fluid container, perhaps from the gas bleeding of described variable volume device and so that described variable volume device shrink to reduce the liquid level in the described fluid container or reduce pressure in the described fluid container.
Favourable, described trigger pip comprises at least a in the pressure, core temperature of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside.
Favourable, the liquid level in the fluid container be used for to be regulated in the bottom that described variable volume device is arranged on 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
Favourable, controlled at least one in the inflation/deflation speed, aeration quantity, charge pressure of described variable volume device by the running of described air pump.
Favourable, described variable volume assembly uses in the presurized water reactor safety injection system.
According to a second aspect of the invention, the method of the liquid level in a kind of liquid container of adjusting in the nuclear power station has been proposed, comprise the steps: in described liquid container, to arrange the variable volume device, at least a portion of described variable volume container places below the liquid level of liquid container, and described variable volume device communicates with air pump; Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the liquid level in the described liquid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the liquid level in the described liquid container.Favourable, described liquid 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
According to a third aspect of the invention we, proposed the method for the pressure in a kind of fluid container of adjusting in the nuclear power station, comprise the steps: to arrange the variable volume device in described fluid container, described variable volume device communicates with air pump; Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the pressure in the described fluid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the pressure in the described fluid container.Favourable, 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), voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
According to a forth aspect of the invention, proposed a kind of pressure change assembly that uses in the fluid container of nuclear power station, having comprised: place the rigid container in the described fluid container, the pressure in the described rigid container is different from the pressure in the described fluid container; At least one valve gear is arranged on the described rigid container, and described valve gear is suitable for opening and so that described rigid container and described fluid container pass to the pressure that changes in the described fluid container mutually by described valve gear based on trigger pip.Favourable, described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.Favourable, 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
According to a fifth aspect of the invention, proposed a kind of liquid level of using and change assembly in the liquid container of nuclear power station, comprising: be fixed in the rigid container in the described liquid container, the described rigid container of at least a portion places below the liquid level; At least one valve gear, be arranged on the described rigid container, described valve gear is suitable for opening and flowing into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container and described fluid container pass to the liquid that allows in the fluid container mutually by described valve gear based on trigger pip.Favourable, described trigger pip comprises at least a in poor of the internal pressure of pressure, core temperature, rigid container and liquid container that liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container is inner.Favourable, described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), containment sump, peace are annotated case (ACC), containment, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
According to a sixth aspect of the invention, the method of the liquid level in a kind of liquid container of adjusting in the nuclear power station has been proposed, comprise the steps: in described liquid container, rigid container to be set, at least a portion of described rigid container places below the liquid level of liquid container, is provided with at least one valve gear on the described rigid container; Open described valve gear based on trigger pip and flow into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container passes to the liquid that allows in the fluid container with described fluid container mutually by described valve gear.Favourable, described liquid 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
According to a seventh aspect of the invention, the method of the pressure in a kind of fluid container of adjusting in the nuclear power station has been proposed, comprise the steps: in described fluid container, rigid container to be set, pressure in the described rigid container is different from the pressure in the described fluid container, is provided with at least one valve gear on the described rigid container; Open described valve gear and so that described rigid container and described fluid container pass to the pressure that changes in the described fluid container mutually by described valve gear based on trigger pip.Favourable, 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), voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
In said method, described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
Description of drawings
Fig. 1 is a schematic diagram, it shows the variable volume device that places in the fluid container, this variable volume device communicates with air pump, wherein Fig. 1 a shows be not triggered state before expanding of variable volume assembly, Fig. 1 b then shows be triggered state after expanding of this variable volume assembly, in Fig. 1 b, the liquid level in the fluid container raises based on this expansion;
Fig. 2 is a schematic diagram, wherein shows rigid container according to an embodiment of the invention and places in the fluid container.
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, can utilize technical scheme of the present invention to 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.Raising is flooded liquid level and naturally is conducive to removing of heat.
In addition, technical scheme of the present invention can be regulated the liquid level in the liquid container as required, regulates the pressure in the closed container.
As shown in fig. 1, the present invention proposes a kind of variable volume assembly that in nuclear power station, uses, comprising: air pump 10; Variable volume device 20, be arranged in the fluid container 30, wherein, described air pump 10 based on start trigger signal with to described variable volume device 20 supply gas and so that described variable volume device 20 expands the to raise liquid level in the described fluid container or increase pressure (corresponding to the situation from Fig. 1 a to Fig. 1 b among Fig. 1) in the described fluid container, perhaps from described variable volume device 20 gas bleedings and so that described variable volume device 20 shrink to reduce the liquid level in the described fluid container or reduce pressure (corresponding to the situation from Fig. 1 b to Fig. 1 a Fig. 1) in the described fluid container.Since it should be noted that it is to rely on volumetric expansion or dwindle to increase or reduces the interior pressure of fluid container 30, then this fluid container 30 roughly seals.
Valve 40 with the startup of air pump interlock can be set, and this valve 40 is arranged between air pump 10 and the variable volume device 20 (as shown in fig. 1), also valve can be set, but the outlet of air pump directly is communicated to variable volume device 20.Also special valve can be set at the entrance of air pump 10.
Described variable volume assembly also comprises stop means 50, position and/or the shape of the described stop means 50 described variable volume devices of restriction after volume change.For example, as shown in Fig. 1 b, stop means 50 can be used for the direction of the volume expansion of defined volume variset 20, the position of restricted volume variset 20 and shape.This stop means can be adjustable telescopic device.Stop means can also play the variable volume device is fixed on effect in the fluid container.For example, this stop means can be a rigid frame with holes, and the variable volume device is limited in expanding in this rigid frame, and is corresponding, this variable volume device also can be fixed in this rigid frame, and this rigid frame then can be fixed on the chamber wall of fluid container.In Fig. 1, variable volume container 20 in Fig. 1 a compressive state and the swelling state among Fig. 1 b between variable, variable volume container 20 is in the side (being the left side among Fig. 1 a) of rigid frame 50 in when compression.But, variable volume device 20 also can be positioned at the whole bottom of rigid frame when compressive state, then is full of the whole inner space of rigid frame when expanding.
Can control in the inflation/deflation speed, aeration quantity, charge pressure of described variable volume device 20 at least one by the running of described air pump 10.For example, control inflation/deflation speed by the rotating speed of regulating air pump 10, regulate working time and control aeration quantity and charge pressure.At this moment, valve 40 can be set to fully open/closed type.
Optionally, the aeration speed of variable volume device/venting speed can also be by the aperture control of valve 40, and this valve 40 can be electrically operated valve, can come by the control motor aperture of operation valve 40.
The liquid level in the fluid container be used for to be regulated in the bottom that described variable volume device is arranged on 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
Described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
In the situation that needs can dwindle the variable volume mechanism that expands to reuse by venting.
Need to be pointed out that specially, a plurality of variable volume devices 20 can be set, be separately positioned in the different fluid containers, to make up adjusting.The pressure change assembly that this is equally applicable to mention later.
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 variable volume device 20 of variable volume assembly expanded, the volume of variable volume assembly was also little, does not affect the operation of containment sump.When accident occured, variable volume device 20, 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 because air pump 10 is activated, and improves the liquid level of flooding of reactor core.The trigger pip of booster air pump 10 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 variable volume device 20 expands.
Material-changing water tank or Core makeup tank are example in take fluid container as containment, and before the variable volume device 20 of variable volume assembly expanded, the volume of variable volume 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, variable volume device 20 because air pump 10 is activated 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.The trigger pip of booster air pump 10 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 variable volume device 20 expands.
Annotate case as example take fluid container as peace, before the variable volume device 20 of variable volume assembly expanded, the volume of variable volume assembly was also little, does not affect the operation that peace is annotated case.When accident occurs, variable volume device 20 owing to triggering 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 variable volume device 20 also helps to improve pacifies the pressure of annotating in the case, thereby guarantees the peace beam speed of peace notes case.The trigger pip of booster air pump 10 can be obtained by sensor.Trigger pip also can be annotated the peace beam speed of case or the pressure in the peace notes 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, can be so that this variable volume device 20 expands, to improve the liquid level in the peace notes case, raising along with liquid level, peace is annotated pressure head to be increased, thus the also corresponding increase of peace beam speed.
Trigger pip can also need to be carried out the trouble-signal that peace is annotated operation for core temperature 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 variable volume device can be the high-temperature resistant rubber material.
The above main situation of volumetric expansion component application in nuclear power station safety injection system that illustrated.
Variable volume device according to variable volume assembly of the present invention can also be arranged in the voltage stabilizer (PZR).Described trigger pip can comprise the pressure in the voltage stabilizer.
The basic function of voltage stabilizer is to set up and keep the pressure of a circuit system (reactor coolant loop).Voltage stabilizer maintains a circuit pressure under the constant pressure when nuclear power station stable operation; When a circuit system transient state, the pressure variation is restricted in the permissible value; When accident, prevent a circuit system superpressure, safeguard the integrality of a circuit system.In addition, voltage stabilizer can be used as the buffer container in a loop, absorbs the rapid variation of a circuit system water receptacle.The bottom is water in the voltage stabilizer, and top is air space.Well heater is arranged on the bottom of voltage stabilizer, and when the voltage stabilizer internal pressure reduced, well heater heated so that part water is evaporated to saturated vapor; When the top of voltage stabilizer is provided with spray equipment and is higher than predetermined value or setting valve with the pressure in voltage stabilizer, spray subcooled water so that the part steam condensation to air space.The pressure of voltage stabilizer has represented the pressure in a loop.
Above-mentioned safety injection system can be the safety injection system of presurized water reactor, variable volume 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 above improves peace to annotate pressure head is that example has illustrated the variable volume assembly.It should be noted that the variable volume volume of a container reduces in the situation of the gas in air pump draw volume variodenser, thus can be so that the liquid level in the liquid container reduces or so that the pressure decreased in the airtight fluid container.
Correspondingly, the present invention has also proposed the method for the liquid level in a kind of liquid container of adjusting in the nuclear power station, comprise the steps: in described liquid container, to arrange the variable volume device, at least a portion of described variable volume container places below the liquid level of liquid container, and described variable volume device communicates with air pump; Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the liquid level in the described liquid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the liquid level in the described liquid container.Described liquid container can be at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC), containment, voltage stabilizer in Core makeup tank (CMT), containment sump, the containment.
The present invention also proposes the method for the pressure in a kind of fluid container of adjusting in the nuclear power station, comprises the steps: to arrange in described fluid container the variable volume device, and described variable volume device communicates with air pump; Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the pressure in the described fluid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the pressure in the described fluid container.What described fluid container was favourable is airtight container, and for example be at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), peace are annotated case (ACC), voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
In above method, described trigger pip comprises at least a in the pressure, core temperature of liquid level in the liquid container, peace beam speed that liquid flows out described liquid container, described liquid container inside.
More than described with the pressure in enabling fashion (utilizing the start and stop of air pump) the change fluid container, the mode of hydraulic pressure, the following describes with the pressure in the non-enabling fashion change fluid container, the mode of hydraulic pressure.
As shown in Figure 2, the present invention proposes a kind of pressure change assembly that uses in the fluid container of nuclear power station, comprising: place the rigid container 60 in the described fluid container, the pressure in the described rigid container 60 is different from the pressure in the described fluid container 30; At least one valve gear 70 is arranged on the described rigid container, and described valve gear is suitable for opening and so that described rigid container 60 and described fluid container 30 pass to the pressure that changes in the described fluid container 30 mutually by described valve gear 70 based on trigger pip.Favourable, described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.Favourable, 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.Significantly, use the fluid container of this pressure change assembly to be airtight container.
In addition, in the situation of the pressure in needs reduce fluid container 30, rigid container 60 can place in the gas space of fluid container 30, also can place in the fluid space of fluid container 30.If place in the gas space, the pressure that then only needs rigid container 60 interior pressure to be lower than this gas space gets final product; If place in the fluid space, then only need the liquid in the fluid space can enter into rigid container 60 interior getting final product.And in the situation of the pressure in needs rising fluid container 30, the pressure inevitable requirement in the rigid container 60 is higher than the pressure in the fluid container 30, and at this moment, rigid container 60 can place the gas space or the fluid space of fluid container 30.
In addition, in the situation of the pressure in rigid container greater than the pressure in the fluid container, valve gear 70 is opened and can also causes the peace of the interior pressure increase of fluid container or this fluid container to annotate the pressure head increase.
Fig. 2 also is applicable to a kind of liquid level of using and changes assembly in the liquid container of nuclear power station, comprising: be fixed in the rigid container in the described liquid container, the described rigid container of at least a portion places below the liquid level; At least one valve gear, be arranged on the described rigid container, described valve gear is suitable for opening and flowing into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container and described fluid container pass to the liquid that allows in the fluid container mutually by described valve gear based on trigger pip.Favourable, described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.Favourable, described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), containment sump, peace are annotated case (ACC), containment, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
Because rigid container receives liquid in liquid container with its inner space, thus at valve gear so that rigid container when communicating with liquid container, can reduce the interior liquid level of liquid container.Favourable, this valve gear is arranged on the bottom of rigid container, so that this rigid container of liquid inlet and outlet in the fluid container.
Based on this rigid container, the present invention has also proposed the method for the liquid level in a kind of liquid container of adjusting in the nuclear power station, comprise the steps: in described liquid container, rigid container to be set, at least a portion of described rigid container places below the liquid level of liquid container, is provided with at least one valve gear on the described rigid container; Open described valve gear based on trigger pip and flow into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container passes to the liquid that allows in the fluid container with described fluid container mutually by described valve gear.
Based on this rigid container, the invention allows for the method for the pressure in a kind of fluid container of adjusting in the nuclear power station, comprise the steps: in described fluid container, rigid container to be set, pressure in the described rigid container is different from the pressure in the described fluid container, is provided with at least one valve gear on the described rigid container; Open described valve gear and so that described rigid container and described fluid container pass to the pressure that changes in the described fluid container mutually by described valve gear based on trigger pip.
It is pointed out that for the above valve gear that rigid container is communicated with fluid container can be the special valve that arranges, it can be based on trigger pip by motor-driven; Also can only be arranged in the opening on the chamber wall (for example diapire) of rigid container the film that the inner space with the inner space of this rigid container and fluid container separates, this film is suitable for based on the pressure differential between the internal pressure of rigid container internal pressure and fluid container and destroyed (being opened corresponding to valve), correspondingly, trigger pip is for surpassing the pressure differential of threshold value.
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.
Based on technical scheme of the present invention, utilize relatively simple structure, can further improve the peace of safety injection system and annotate pressure head, the security of safety injection system is provided; Can also further regulate as required the interior pressure/liquid level of fluid container of nuclear power station, in case of emergency to alleviate security incident.
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 (22)
1. variable volume assembly that uses in nuclear power station comprises:
Air pump;
The variable volume device is arranged in the fluid container of nuclear power station,
Wherein, described air pump based on start trigger signal with to described variable volume unit feeding gas and so that described variable volume device expands the to raise liquid level in the described fluid container or increase pressure in the described fluid container, perhaps from the gas bleeding of described variable volume device and so that described variable volume device shrink to reduce the liquid level in the described fluid container or reduce pressure in the described fluid container.
2. variable volume assembly according to claim 1, wherein:
Described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
3. variable volume assembly according to claim 1, wherein:
The liquid level in the fluid container be used for to be regulated in the bottom that described variable volume device is arranged on 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
4. variable volume assembly according to claim 1, wherein:
Controlled at least one in the inflation/deflation speed, aeration quantity, charge pressure of described variable volume device by the running of described air pump.
5. variable volume assembly according to claim 1, wherein:
Described variable volume assembly uses in the presurized water reactor safety injection system.
6. variable volume assembly according to claim 1, wherein:
Described variable volume assembly also comprises stop means, and described stop means limits position and/or the shape of described variable volume device after volume change.
7. a method of adjusting the liquid level in the liquid container in the nuclear power station comprises the steps:
The variable volume device is set in described liquid container, and at least a portion of described variable volume container places below the liquid level of liquid container, and described variable volume device communicates with air pump;
Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the liquid level in the described liquid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the liquid level in the described liquid container.
8. method according to claim 7, wherein:
Described liquid 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
9. a method of adjusting the pressure in the fluid container in the nuclear power station comprises the steps:
The variable volume device is set in described fluid container, and described variable volume device communicates with air pump;
Based on the described air pump of start trigger signal with to described variable volume device air feed and so that described variable volume device expand, thereby improve the pressure in the described fluid container, perhaps start described air pump to bleed from described variable volume device so that described variable volume device shrinks, thereby reduce the pressure in the described fluid container.
10. method according to claim 9, wherein:
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), voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
11. each described method according to claim 7-10, wherein:
Described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
12. a pressure change assembly that uses in the fluid container of nuclear power station comprises:
Place the rigid container in the described fluid container, the pressure in the described rigid container is different from the pressure in the described fluid container;
At least one valve gear is arranged on the described rigid container, and described valve gear is suitable for opening and so that described rigid container and described fluid container pass to the pressure that changes in the described fluid container mutually by described valve gear based on trigger pip.
13. pressure change assembly according to claim 12, wherein:
Described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
14. pressure change assembly according to claim 12, wherein:
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, voltage stabilizer in Core makeup tank (CMT), the containment.
15. a liquid level of using in the liquid container of nuclear power station changes assembly, comprising:
Be fixed in the rigid container in the described liquid container, the described rigid container of at least a portion places below the liquid level;
At least one valve gear, be arranged on the described rigid container, described valve gear is suitable for opening and flowing into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container and described fluid container pass to the liquid that allows in the fluid container mutually by described valve gear based on trigger pip.
16. liquid level according to claim 15 changes assembly, wherein:
Described trigger pip comprises at least a in poor of the internal pressure of pressure, core temperature, rigid container and liquid container that liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container is inner.
17. liquid level according to claim 15 changes assembly, wherein:
Described fluid container is at least a with in the lower member of nuclear power station: material-changing water tank (IRWST), containment sump, peace are annotated case (ACC), containment, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
18. a method of adjusting the liquid level in the liquid container in the nuclear power station comprises the steps:
In described liquid container rigid container is set, at least a portion of described rigid container places below the liquid level of liquid container, is provided with at least one valve gear on the described rigid container;
Open described valve gear based on trigger pip and flow into the liquid level that reduces in the described rigid container in the described liquid container so that described rigid container passes to the liquid that allows in the fluid container with described fluid container mutually by described valve gear.
19. method according to claim 18, wherein:
Described liquid 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, voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), containment sump, the containment.
20. a method of adjusting the pressure in the fluid container in the nuclear power station comprises the steps:
In described fluid container rigid container is set, the pressure in the described rigid container is different from the pressure in the described fluid container, is provided with at least one valve gear on the described rigid container;
Open described valve gear and so that described rigid container and described fluid container pass to the pressure that changes in the described fluid container mutually by described valve gear based on trigger pip.
21. method according to claim 20, wherein:
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), voltage stabilizer, reactor pressure vessel (RPV), steam generator (SG) in Core makeup tank (CMT), the containment.
22. each described method according to claim 18-21, wherein:
Described trigger pip comprises at least a in the inner pressure of liquid level, the peace beam speed of liquid trickle container, the liquid container in the liquid container, the core temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210377663.6A CN102903400B (en) | 2012-10-08 | 2012-10-08 | Variable volume assembly, pressure change assembly, pressure/liquid level change method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210377663.6A CN102903400B (en) | 2012-10-08 | 2012-10-08 | Variable volume assembly, pressure change assembly, pressure/liquid level change method |
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| CN102903400B CN102903400B (en) | 2016-03-30 |
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| Publication number | Publication date |
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| CN102903400B (en) | 2016-03-30 |
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