CN110299216A - It is a kind of for the cooling apparatus of the interim cooling supply of nuclear power plant nuclear island and for cooling method - Google Patents
It is a kind of for the cooling apparatus of the interim cooling supply of nuclear power plant nuclear island and for cooling method Download PDFInfo
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- CN110299216A CN110299216A CN201910752315.4A CN201910752315A CN110299216A CN 110299216 A CN110299216 A CN 110299216A CN 201910752315 A CN201910752315 A CN 201910752315A CN 110299216 A CN110299216 A CN 110299216A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/12—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from pressure vessel; from containment vessel
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/14—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from headers; from joints in ducts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
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Abstract
The invention discloses a kind of cooling apparatus for the interim cooling supply of nuclear power plant nuclear island and for cooling method, cooling apparatus includes containment continuous ventilating system, chilled water system and air inlet, chilled water system connects the containment continuous ventilating system, for cooling down to external water source and/or recirculated water, chilled water after cooling is delivered to the containment continuous ventilating system to reduce the temperature and humidity of reactor building different zones；Air inlet is arranged outside reactor building, for extracting outdoor air and different zones through the containment continuous ventilating system to the reactor building are to reduce dust concentration.The present invention is connected chilled water system and containment continuous ventilating system using interim intercycle circuit, the peace stage, which is built, in nuclear power unit realizes that reactor building zonal ventilation refrigeration puts into operation in advance, reactor building region temperature and humidity and dust concentration are reduced, realizes that nuclear power unit builds peace stage people because of environment and the double promotions of work efficiency.
Description
Technical field
The present invention relates to nuclear power station construction and debugging field more particularly to a kind of confessions for the interim cooling supply of nuclear power plant nuclear island
Device for cooling and for cooling method.
Background technique
PWR nuclear power plant nuclear island chilled water system (DEG) is a closed cooling system, its function is to pass through three
The chilled water that platform refrigeration unit provides takes nuclear island ventilating system heat out of, eventually by component cooling water system (RRI) and core
Heat is transmitted in seawater by island essential service water system (SEC) step by step.DEG system mainly includes electric water circulating pump
DEG001/002/003PO, refrigeration unit DEG101/201/301GF, baffle-box DEG001BA and corresponding conduit fittings and valve
Door.Electrical building chilled water system (DEL) is a closed cooling system, it by three refrigeration units (two water coolings and
One typhoon is cold) chilled water that provides takes electrical building (LX) ventilation heat out of, eventually by component cooling water system (RRI) or
The outer air of workshop is by heat derives.DEL system capital equipment includes electric water circulating pump DEL001/002/003PO, refrigeration unit
DEL101/201GF (water cooling), DEL301GF (air-cooled), surge tank DEL001BA and corresponding conduit fittings and valve.Containment
Continuous ventilating system (EVR) is closed cycle cooling-fan installation, and whole system is divided into main ventilation and dome ventilation.Main ventilation system
System is made of equipment such as three Fans, cooling coil, valve and air ports, is mainly used for keeping temperature appropriate in reactor building
Degree state, operates normally equipment, enters convenient for personnel；Dome ventilating system is made of two Fans, air hose and air-valve, mainly
For providing dome ventilation appropriate.During normal operation, EVR system is divulged information by forced circulation will for PWR nuclear power plant unit
The heat transfer that reactor building (RX) region internal unit generates is to DEG system chilled water.The compressor of DEG cooling system machine
It does work to refrigerant, will be cooling by EVR heat exchanger chilled water, while RRI system is transferred heat to, SEC passes through circulation sea
RRI system thermal is finally transmitted in seawater by water.Nuclear power unit passes through DEL system during normal operation and sets control zone technology
Air-conditioning system (DCA) between standby, control zone can reside an air-conditioning system (DCL), electrical building main ventilation system (DVL), cable floor
Ventilating system (DVE) heat derives are to RRI system, preference temperature needed for maintaining LX plant and equipment and personnel.In DEL system water
When cold refrigeration unit is unavailable, use air-cooled screw compressor water chiller (DEL003GF) and its corresponding DEL003PO for DCA, DCL
System provides cold source, it is ensured that the electric panel cabinet of master control room equipment and DCS can keep operating normally in LX workshop.
The prior art is to meet nuclear power unit to build peace stage RX zonal ventilation refrigeration, and need to freeze ventilation related system connection
Conjunction puts into operation, i.e., installs DEG/EVR/RRI/SEC system, and each system completes debugging efforts, then carry out combining put into operation, it can be achieved that
Unit is building peace stage RX zonal ventilation refrigerating operaton, and RX zonal ventilation Refrigeration Technique scheme is as shown in Figure 1.Prior art requirement
The realization after building the systems such as peace stage DEG/EVR/RRI/SEC and completing installation, debugging of PWR nuclear power plant unit, which is combined, to put into operation, this
When EVR system pass through the forced circulation ventilation heat transfer that generates the region RX internal unit to DEG system chilled water, DEG system
The compressor of controlling cold does work to refrigerant, will be cooling by EVR heat exchanger chilled water, while transferring heat to RRI system
RRI system thermal is finally transmitted in seawater by system, SEC by circulating seawer, and put into operation ventilation refrigeration mesh in the final realization region RX
's.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems: 1) according to presurized water reactor
Nuclear power plant's machine sets up the construction and debugging logic in peace stage, and SEC/RRI System Priority completes installation and debugging, to realize the region RX
Ventilation refrigeration, which puts into operation, needs to modify nuclear power unit construction and debugging logic (DEG/EVR/RRI/SEC system while being constructed while being adjusted
Examination), each construction of hydropower duration in Construction of Unit stage and the installation of subsequent workshop built-in system, debugging duration are influenced, to increase
Construction of Unit cost；2) region RX puts into operation to divulge information to freeze and put into operation, and needs DEG/EVR/RRI/SEC system while installing and debugging,
Keep nuclear power unit larger in the installation in a certain stage and debugging work load fluctuation, be unfavorable for effective arrangement of personnel and rationally match
It sets；3) after DEG/EVR/RRI/SEC system puts into operation simultaneously, internal system equipment is required to participate in operation, increases equipment and is
It unites daily O&M cost；4) EVR system is mainly used for keeping state of temperature appropriate in reactor building, and fan induced draught mouth is set
It sets in the region RX, nuclear power unit realizes the internal air circulation in the region RX during running.The peace stage is built in nuclear power unit, was constructed
In air, because of the region RX relative closure, EVR system is that closed cycle is cold to the particles floats such as a large amount of iron filings, dust that journey generates
But ventilating system, therefore nuclear power unit is built in the region peace stage RX after ventilation refrigeration puts into operation can not solve the problems, such as that dust concentration is high.
Therefore, it is badly in need of providing a kind of cooling apparatus, solves above-mentioned technical problem.
Summary of the invention
In order to solve problems in the prior art, the embodiment of the invention provides a kind of for the interim cooling supply of nuclear power plant nuclear island
Cooling apparatus, the technical solution is as follows: a kind of cooling apparatus for the interim cooling supply of nuclear power plant nuclear island, including containment are continuous
Ventilating system, further includes: chilled water system and air inlet, chilled water system connect the containment continuous ventilating system, be used for
External water source and/or recirculated water are cooled down, by chilled water after cooling be delivered to the containment continuous ventilating system with
Reduce the temperature and humidity of reactor building different zones；Air inlet is arranged outside reactor building, for extracting outdoor air
And the different zones through the containment continuous ventilating system to the reactor building are to reduce dust concentration.
Wherein, the chilled water system includes: air-cooled screw compressor water chiller and intermediate interim circulation loop system, air-cooled spiral shell
Bar water cooler connects external water source, for being cooled down by heat exchange to external water source and/or recirculated water；Centre is temporarily followed
Loop back path system connects the air-cooled screw compressor water chiller, for controllably providing recirculated water for air-cooled screw compressor water chiller.
Wherein, the interim circulation loop system in the centre includes control unit and water flow switch, described control unit point
The air-cooled screw compressor water chiller and water flow switch are not connected, are used for when judging that chilled-water flow is less than preset value,
Water flow switch is closed, while instruction of stopping transport is issued to the air-cooled screw compressor water chiller.
Wherein, the interim circulation loop system in the centre further includes interim water pump, is separately connected the containment and continuously leads to
Wind system and the air-cooled screw compressor water chiller, for by external water source and/or recirculated water from the air-cooled screw compressor water chiller
Extract to the containment continuous ventilating system, and will extract to the external water source of the containment continuous ventilating system and/or
Recirculated water is extracted again to the air-cooled screw compressor water chiller, realizes that external water source and/or recirculated water are continuous in the containment
It is circulated between ventilating system and the air-cooled screw compressor water chiller；The input terminal and output end of the interim water pump are right respectively
Interim control valve of water pump should be connected, the interim control valve of water pump is used to pass through when the interim water pump breaks down
Interim water pump isolation described in the interim control valve for water pump goalkeeper is closed, is faced to be isolated after intercycle loop medium described
When water pump overhaul.
Wherein, the interim circulation loop system in the centre further includes two pressure gauges and strainer, two pressure gauges point
Entrance and the exit of the interim water pump are not set, for showing the real time execution parameter of interim water pump, the strainer
The entrance of the interim water pump, the impurity for filter freezing water are set.
Wherein, the cooling device further includes exhaust valve, drain valve and exhaust auxiliary valve, draining auxiliary valve, the row
Air valve one end connects the interim circulation loop system in centre, and the other end connects external environment, for gas to be discharged into atmosphere；Institute
It states drain valve one end and connects the interim circulation loop system in centre, the other end connects catch-basin, for chilled water to be discharged into rain
Well；Described exhaust auxiliary valve one end connects the interim circulation loop system in centre, and the other end connects the exhaust valve, described
It drains auxiliary valve one end and connects the interim circulation loop system in centre, the other end connects the drain valve, the exhaust auxiliary
Valve and the draining auxiliary valve are used cooperatively, and for emptying the interior media of the water loop system, are prevented in pipeline and equipment
There is negative pressure in portion.
Wherein, the interim circulation loop system in the centre further includes reserve pump, the reserve pump and the interim water
Pump is in parallel, for improving the reliability and maintenance convenience of intermediate interim circulation loop system；The reserve pump input end and
Outlet end is equipped with reserve pump control valve, and the reserve pump control valve is used for when the reserve pump breaks down,
The reserve pump is isolated by closing the reserve pump control valve, to be isolated after intercycle loop medium to institute
State reserve pump maintenance.
Wherein, the predetermined height above containment continuous ventilating system bottom is arranged in the air inlet, for avoiding
Site operation is impacted, is provided with filter screen at the air inlet, for the dust in filtering external air.
Wherein, the containment continuous ventilating system further includes inner fan and heat exchanger；The heat exchanger is used for institute
The outside air for stating air inlet sucking is cooling；The inner fan is used to outside air after cooling being delivered to reactor building
Each region.
On the other hand, the embodiment of the invention provides a kind of for the interim cooling supply of nuclear power plant nuclear island for cooling method, described
Method includes: that external water source and/or recirculated water are delivered to air-cooled screw cooling-water machine by S100, intermediate interim circulation loop system
Group；S200, air-cooled screw compressor water chiller cool down external water source and/or recirculated water, form chilled water；S300, centre are faced
When circulation loop system chilled water is delivered to containment continuous ventilating system；S400, containment continuous ventilating system are by air draught
The outside air of mouth sucking is cooled down, and outside air after cooling is delivered to each area of reactor building by inner fan
Domain, the step for detailed process are as follows: via air inlet sucking outside air with flow through the cold of containment continuous ventilating system
Freeze water and carry out heat exchange, outside air is cooled after heat exchange；S500, intermediate interim circulation loop system will with outside air into
Chilled water after row heat exchange is delivered to air-cooled screw compressor water chiller again and is cooled down；Before step S300 further include: sentence
Disconnected chilled-water flow executes step S600, is stopped air-cooled screw compressor water chiller by control module when it is less than preset value
Fortune executes step S300 when it is not less than preset value.
Technical solution provided in an embodiment of the present invention has the benefit that will by using interim intercycle circuit
Air-cooled screw compressor water chiller (DEL003GF) is connected with containment ventilating system (EVR), builds the peace stage in nuclear power unit, is led to
It crosses heat exchanger (EVR003ZV) and refrigeration is aerated to the region reactor building (RX), realize that RX zonal ventilation refrigeration is thrown in advance
Fortune reduces Construction of Unit cost；And after nuclear power unit RX region Temporary Ventilation refrigeration puts into operation, each region fan outlet temperature of RX
At 20 degree or so, each region actual temperature is at 26 degree or so, 8 degree low compared with ambient temperature or so, establishes relatively comfortable apply
Work environment；EVR003ZV sucks the region outside air displacement RX inner air by air inlet, and the area RX can be completed in one hour
The displacement of domain inner air, is effectively reduced RX regional dust concentration；And realize that temperature and humidity and dust concentration reduce inside the region RX, subtract
Few construction personnel's security protection cost, elevator set up peace staged construction personnel work efficiency；In addition, passing through Temporary Ventilation refrigerating plant
It puts into operation, instead of the buying and use of live interim air-conditioning, axial flow blower, dehumidifier, reduces the interim items purchase cost in scene,
Reduce daily gadget maintenance work amoun.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the region prior art RX of the present invention Refrigeration Technique scheme schematic diagram；
Fig. 2 is the cooling device schematic diagram for the interim cooling supply ventilation of nuclear power plant nuclear island that the embodiment of the present invention one provides；
Fig. 3 is that the embodiment of the present invention one provides DEL003GF and EVR heat exchanger parameters comparison chart；
Fig. 4 is the arrangement side that the DEL003GF access EVR003RF that the embodiment of the present invention one provides divulges information to RX district cooling
Formula comparative analysis figure；
Fig. 5 is the cooling means flow chart provided by Embodiment 2 of the present invention for the interim cooling supply ventilation of nuclear power plant nuclear island.
Specific embodiment
In order to solve to cannot achieve in the prior art nuclear power unit build peace elementary reaction heap workshop region put into operation in advance it is logical
Wind refrigeration, reduces the technical issues of machine sets up peace elementary reaction heap workshop region temperature and humidity and dust concentration, the present invention is directed to mention
For a kind of device for the interim cooling supply of nuclear power plant nuclear island, core concept is: providing one kind and temporarily supplies for nuclear power plant nuclear island
Cold cooling apparatus, cooling apparatus include containment continuous ventilating system and chilled water system and air inlet, chilled water system
Containment continuous ventilating system is connected, for being cooled down to external water source and/or recirculated water, and chilled water after cooling is defeated
It send to containment continuous ventilating system, for reducing the temperature and humidity of reactor building different zones；Air inlet is arranged anti-
It answers outside heap workshop, for extracting outdoor air and the different zones through containment continuous ventilating system to reactor building, and
Air inlet is equipped with strainer, for dust concentration to be effectively reduced.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
The embodiment of the invention provides a kind of devices for the interim cooling supply of nuclear power plant nuclear island, and referring to fig. 2, one kind being used for core
The cooling device of the interim cooling supply of power plant's nuclear island, including containment continuous ventilating system (EVR) 100, chilled water system 20, chilled water
System 20 connects EVR 100, for cooling down to external water source and/or recirculated water, and chilled water after cooling is delivered to
EVR 100 is to reduce the temperature and humidities of reactor building different zones；EVR 100 includes an air inlet 103, by air inlet
103 be arranged in the predetermined height above containment continuous ventilating system bottom, which can according to actual needs
Difference is configured, and of the invention opening that there are three the regions RX is 0,8,20 meter of air lock door respectively in one embodiment,
Therefore to avoid impacting site operation, air inlet 103 is arranged to outside 20 meters of air lock doors of RX workshop, for may filter that ground
It extracts outdoor air and the different zones through EVR 100 to reactor building replaces RX different zones inner air, with
Reduce dust concentration, wherein R740, R710, R470, R412, R210, R245, R147 and R120 represent reactor building in figure
Different zones.Further, EVR100 further includes inner fan 101 and heat exchanger 102；Heat exchanger 102 is used for air inlet
The outside air of 103 suckings is cooling；Inner fan 101 will be for that will be delivered to reaction through the outside air after cooling of heat exchanger 102
Each region of heap workshop.Further, strainer 104 is installed in air inlet 103 and enters dust inside the region RX to further decrease.Its
In, the device model of heat exchanger 102 is EVR003ZV, and EVR003ZV uses the non-nuclear leve of NCAA-1250A type of south wind producer production
Centrifugal blower, the fan delivery are 92500m3/h, and the heat exchange amount of blower heat exchanger is 680kW, and corresponding DEG pipeline flow is
97.5m3/h。
Chilled water system 20 includes: air-cooled screw compressor water chiller 200 and intermediate interim circulation loop system 300, air-cooled spiral shell
Bar water cooler 200 connects external water source, for being cooled down by heat exchange to external water source and/or recirculated water；Air-cooled spiral shell
The working principle of bar water cooler 200 are as follows: air-cooled screw compressor water chiller 200 using its inner evaporator make external water source and/or
Recirculated water and refrigerant carry out heat exchange, thermic load of the coolant system in absorption portion water source and/or recirculated water, make portion water source and/
Or circulating water cooling generates chilled water Hou ﹐ and so that heat is taken finned cooler to by the effect of compressor, then by radiator fan
It is lost in extraneous air；Intermediate interim circulation loop system 300 connects air-cooled screw compressor water chiller 200, for can control
Ground provides recirculated water for air-cooled screw compressor water chiller 200.
It should be noted that since external water source is seawater, but in seawater, there are the pH value that some minerals make seawater
It is not inconsistent standardization, if flowing into each pipeline of nuclear island without processing, pipeline will be corroded, avoids pipe during system operation
Road inner wall corrodes and influences equipment normal operation, and therefore, cooling apparatus further includes nuclear island desalination water distribution system (SED) 400, packet
At least one desalination valve 401 is included, before external water source enters in intermediate interim circulation loop system 300, in external water source
External water source water quality adjustment is alkaline water quality, inner wall of the pipe is made to form passivating film to reduce pipeline by middle addition tertiary sodium phosphate
The corrosion of inner wall.
Further, intermediate interim circulation loop system 300 further includes control unit 301 and water flow switch 302, control
Unit 301 is separately connected air-cooled screw compressor water chiller 200 and the water flow switch 302, for judging that chilled-water flow is small
When preset value, water flow switch 302 is closed, while instruction of stopping transport is issued to air-cooled screw compressor water chiller 200, prevent refrigeration machine
The flow of chilled water reduces or stops suddenly during operation, leads to refrigerating device inner evaporator heat exchange coil frost broken.As core
The formal equipment of power plant and pipeline just just consider the installation of water flow switch in design, therefore there is no water flows to open for formal equipment
Pass can not installation question.For the present invention using intercycle circuit as interim pipeline, not yet consideration water flow switchs installment work,
Therefore need interim circulation loop pump discharge director straight pipe i.e.: 200 exit of air-cooled screw compressor water chiller drill, with
Water flow switch 302 is just installed, and switch actuating signals line is accessed into air-cooled screw compressor water chiller according to equipment wiring drawing
200, it is ensured that reduce after chilled water or refrigeration machine of stopping transport in the case where losing (cut or interim pump shutdown occurs in pipeline), thus
Ensure equipment safety.Wherein, the device model of air-cooled screw compressor water chiller 200 be DEL003GF, DEL003GF using
The MCS200.2FST4 type air-cooling screw type cooling-water machine of McQuay producer production, the unit have 15% under various operating conditions
~100% capacity regulating range and Load Regulation ability, nominal capacity 725kW, chilled water design discharge are
96.5m3/h。
Intercycle circuit system 300 further includes interim water pump 303 and reserve pump 304, reserve pump 304 and interim water
Pump 303 is in parallel, for improving the reliability and maintenance convenience of intermediate interim circulation loop system.According to DEL003GF/
EVR003RF equipment requirement, the interim water pump 303 and reserve pump 304 of intercycle circuit system 300 select conventional centrifugal
Pump, range of pump flow rates are 80~100m3/ h, pump lift range are 25~55m.
Intercycle circuit system 300 further includes two pressure gauges 305 and filter screen 306, and two pressure gauges 305 are set respectively
The entrance in interim water pump 303 and exit are set, for showing the operating parameter of interim water pump in real time, in actual moving process
In, pressure gauge 303 show operating parameter can artificially be read by operator, can also by automatic collection module automatic collection, if
Reading is artificially read by operator, then operator judges the fortune of interim water pump according to the parameter of the display of the pressure gauge 305
Whether row parameter is normal, and then operator stops transport interim water pump 303 manually if abnormal,；If being adopted automatically by automatic collection module
Collect pressure gauge reading, then should also configure a control unit, and setting is stored with the memory of preset value in control unit, when
When control unit judges that the pressure gauge reading of automatic collection module acquisition is more than values, by control unit to operator
Member issues alarm signal, or the instruction for interim water pump 303 of stopping transport is issued automatically by control unit.303 entrance pressure of interim water pump
Power table considers to increase part allowance, inlet pressure gauge range is chosen between 0.8MPa~1.0MPa according to SED hydraulic pressure；Interim pump
Delivery gauge considers interim pump head according to DEL003GF/EVR003RF equipment requirement, and delivery gauge range is chosen
Between 1.0MPa~2.0MPa；The entrance of interim water pump 303 and the entrance of interim water pump 303 is arranged in filter screen 306
Between pressure gauge 305, for reducing the impurity of chilled water.
Intermediate interim circulation loop system 300 further includes interim control valve of water pump 307 and reserve pump control valve
308, interim control valve of water pump 307 is connected respectively the inlet end and an outlet end in interim water pump 303, reserve pump control
Valve 308 is connected respectively the inlet end and an outlet end in reserve pump 304, for according to nuclear power plant's operating status, difference
Controllably correspondence opens or closes interim control valve of water pump 307 and reserve pump control valve 308, realizes interim water pump
303 and the reserve pump 304 switching.Specifically: when needing the work of interim water pump 303, by interim control valve of water pump
307 open, and reserve pump control valve 308 is closed, then interim water pump 303 works, and reserve pump 304 is stopped transport, and work as interim water
When pump 303 breaks down, reserve pump control valve 308 is opened, interim control valve of water pump 307 is closed, and realizes spare water
304 work of pump, interim water pump 303 is stopped transport, by controllably opening and closing interim control valve of water pump 307 and reserve pump
Control valve 308 realizes the simple switching of interim water pump 303 and reserve pump 304.In actual moving process, behaviour can be passed through
Make personnel and artificially open or close interim control valve of water pump 307 and reserve pump control valve 308, can also be controlled by connection
The electric valve of unit is automatically opened or closed interim control valve of water pump 307 and reserve pump control valve 308.It can be according to nuclear power
The mode that the actual demand of factory chooses manually or automatically realizes the switching of water pump.Meanwhile 307 He of interim control valve of water pump
Reserve pump control valve 308 is also used to pass through when the interim water pump 303 and the failure of reserve pump 304 and close institute
It states interim control valve of water pump 307 and reserve pump control valve 308 the interim water pump 303 and reserve pump 304 are isolated,
The interim water pump 303 and reserve pump 304 are overhauled to be isolated after intercycle loop medium.
Further, cooling apparatus further includes exhaust valve 601, drain valve 602 and exhaust auxiliary valve 603, draining auxiliary
Valve 604, the intermediate interim circulation loop system 300 of 601 one end of exhaust valve connection, the other end connects external environment, and is arranged in
Between interim circulation loop system pipeline highest point, for gas to be discharged into atmosphere；The connection of 602 one end of drain valve is intermediate temporarily to follow
Loop back path system 300, the other end connect catch-basin, and the minimum point of intermediate interim circulation loop system pipeline is arranged in, and are used for
Chilled water is discharged into catch-basin；It is vented the intermediate interim circulation loop system 300 of 603 one end of auxiliary valve connection, other end connection row
Air valve 601, the intermediate interim circulation loop system 300 of draining 604 one end of auxiliary valve connection, the other end connect drain valve 602, exhaust
Auxiliary valve 603 and draining auxiliary valve 604 are used cooperatively, and for emptying the interior media of intercycle circuit system 300, prevent pipe
There is negative pressure inside road and equipment.Specifically: opening exhaust valve 601 when intercycle circuit is full of medium for the first time and be vented auxiliary
Valve 603 is helped, drain valve 602 and draining auxiliary valve 604 is closed, operation is exhausted, opened when intercycle circuit empties medium
Drain valve 602 and draining auxiliary valve 604 are opened, intercycle circuit can effectively be emptied by closing exhaust valve 601 and exhaust auxiliary valve 603
Interior media prevents negative pressure occur inside pipeline and equipment.
Further, it is of the invention in one embodiment, intercycle circuit system 300 use stainless steel pipes
As intermediate interim circulation loop pipeline, to reduce the anti-corrosion protection and water quality adjustment work of pipeline.This is because using carbon steel
Pipeline avoids inner wall of the pipe to corrode during system is run and influences equipment and operate normally, and needs to add phosphoric acid in chilled water
Frozen water quality is adjusted to alkaline water quality by trisodium, makes inner wall of the pipe formation passivating film to reduce the corrosion of inner wall of the pipe, will
Increase pipeline corrosion protection work.
In addition, the embodiment of the present invention is before the installation using interim cooling apparatus, to intermediate interim circulation loop system
Can 300 by reactor building region heat in containment continuous ventilating system 100 and air-cooled screw compressor water chiller by operation
Whether transmitting and parameters match and are analyzed between 200.
Air-cooled screw compressor water chiller (DEL003GF) is air-cooled using the MCS200.2FST4 type that McQuay producer produces
Screw cooling-water machine, capacity regulating range and Load Regulation energy of the unit under various operating conditions with 15%~100%
Power.Nominal capacity is 725kW, and chilled water design discharge is 96.5m3/h.Containment continuous ventilating internal system blower
(EVR003ZV) using the non-nuclear leve centrifugal blower of NCAA-1250A type of south wind producer production, which is 92500m3/ h,
The heat exchange amount of blower heat exchanger is 680kW, and corresponding DEG pipeline flow is 97.5m3/h。
DEL003GF nominal capacity is 725kW, and EVR003RF (heat exchanger of EVR003ZV) changes the design of DEG system
Heat is 680kW, and the provided refrigerating capacity of DEL003GF is greater than EVR003RF heat exchange amount, therefore DEL air-cooled unit offer refrigerating capacity can
Meet heat exchange amount needed for EVR separate unit blower operates normally.DEL003GF required chilled-water flow when declared working condition is run is
96.5m3/h., flow needed for the user EVR003RF (heat exchanger of EVR003ZV) of DEG is 97.5m3/h, therefore
DEL003GF is consistent with chilled water needed for EVR003RF and cooling water flow.According to the EOMM handbook and DEG system of DEL003GF
Design manual carries out into comparison, such as Fig. 3 the data such as DEL003GF and EVR heat exchanger frozen water quality, water temperature, pipe diameter
It is shown, confirm the parameters bases such as heat exchange amount, water flow, water temperature, water quality requirement, the pipe diameter of DEL003GF and EVR heat exchange equipment
This matching can be used water-flow circuit and be attached to two systems.
Further, the arrangement of water-flow circuit pipeline is designed, DEG system is being accessed using DEL003GF
It, will according to the different arrangements of water-flow circuit pipeline on the basis of the global schema that user EVR003RF divulges information to RX district cooling
Global schema is divided into two kinds of executable schemes, as shown in figure 4, the comparative analysis of concrete scheme is as follows: arrangement one: will
DEL003GF and EVR003RF is directly connected to by interim pipeline and equipment, and the chilled water circulation in interim pipeline is using interim
Pump, pipeline arrangement by DEL003GF outside DA to the area RX 0m air lock door, after extend to 0m inner ring hole for hoist, then be connected to the negative area 3.4m RX
The advantages of EVR003RF in domain, this arrangement is: (1) temporary pipeline arrangement is simple, needs material less；(2) construction control
System is simple, and the required duration is shorter；(3) when interim refrigerating operaton on the normal debugging efforts of DEL/DEG system without influence；The disadvantage is that:
(1) temporary pipeline arrangement influences the area RX 0m channel space；(2) interim pipeline, the debugging of equipment and O&M lead to safety and quality
Difficulty is controlled to increase.Arrangement two: DEL003GF is connect with EVR003RF by formal and interim pipeline, in interim pipeline
Chilled water circulation using interim pump, pipeline arrangement is connected to DEG using the area WX exterior wall by DEL003GF outside DA to the area WX
Then the formal pipeline of system connects the area RX by DEG penetration piece, the advantages of this arrangement is: (1) area Ke Dui RX EVR/
EVC system provides chilled water, it is ensured that the ventilation of the area RX can bringing normally into operation；(2) it avoids impacting 0 rice grain pattern road of the area RX；(3) it adopts
It metals run out risk during effectively reducing debugging and operation with formal pipeline；The disadvantage is that: (1) in arrangement using part formal pipe
Road influences DEG system debug flush logic, increases the liter version work of temporary boundary change, the boundary TOB and subsequent file；(2) it applies
The work duration is longer, and required interim piping material is more.After comparative analysis confirmation using arrangement one by DEL003GF with
EVR003RF connection.
Finally, the refrigeration effect to refrigerating plant calculates, it is poor to build peace stage RX regional seal in nuclear power unit
(0/8/20 meter of air lock door of RX workshop sentences open state), in installation peak period in the region RX, construction personnel's disengaging frequently,
The fluctuation of air lock door ventilation data is larger in nuclear island, therefore refrigeration effect is unable to get more accurate numerical value.If temporarily freezing energy
Enough that RX interior environment temperature is reduced 4-6 DEG C, the region construction environment temperature is more comfortable.
According to heat exchange calculation formula:
Q=Q1× η=cm Δ t (1)
Wherein: Q is the heat exchange amount of EVR003RF；
Q1For the maximum cooling capacity (725KW) of DEL003GF；
η is the heat exchange efficiency of EVR003RF；
C is specific heat capacity under air normal temperature and pressure；
M is the air quality in the unit time by heat exchanger；
Δ t is the air temperature drop for the unit time passing through heat exchanger.
According to existing nuclear power plant EVR heat exchanger operation data, the heat exchange efficiency η numerical value for obtaining EVR003RF is about
94.3%, the air temperature drop Δ t by heat exchanger can be derived by formula (1) are as follows:
It will be brought into existing nuclear power plant's unit time by the air quality of EVR003RF, the maximum cooling capacity of DEL003GF
Formula (2) can obtain t=5.69 DEG C of Δ, i.e., can be by EVR separate unit blower ventilation temperature in refrigeration machine fully loaded stable operation latter hour
Degree about reduces by 5.69 DEG C.
RX region security hull shape shape approximation is reduced to cylindrical body, it is about 61256m that nuclear island internal volume, which is calculated,3,
EVR system fan air quantity is 90000m3/ h to 100000m3Between/h, therefore that one is run under full load condition is small by DEL003GF
When can by the region RX interior environment temperature reduce about 5 DEG C, i.e., nuclear island Temporary Ventilation for cold energy be the region RX provide more comfortably
Environmental problem.
The embodiment of the present invention is connected DEL003GF and EVR003RF by interim intercycle circuit, EVR003ZV
Sucking outside air is aerated refrigeration to the region RX, builds the peace stage in nuclear power unit and realizes that RX zonal ventilation refrigeration is thrown in advance
Fortune reduces the region RX temperature and humidity and dust concentration, realizes that nuclear power unit builds peace stage people because of environment and the double promotions of work efficiency, using one
Kind is used for the cooling means and device of the interim cooling supply of nuclear power plant nuclear island, it is not necessary that DEG/EVR/RRI/SEC system is constructed, together simultaneously
When debug, RX zonal ventilation refrigeration puts into operation the time more using unit about 167 days in advance of this method and device；EVR003ZV is logical
The entrance air hose sucking region outside air displacement RX inner air is crossed, inner air displacement in the region RX can be completed in one hour,
RX regional dust concentration is effectively reduced；After nuclear power unit RX region Temporary Ventilation refrigeration puts into operation, region inner air humidity is relatively outer
Portion's ambient humidity low 10% or so reduces the number that equipment is damaged because ambient humidity is big；After Temporary Ventilation refrigeration puts into operation, RX
Temperature and humidity and dust concentration reduce inside region, reduce construction personnel's security protection cost, and elevator sets up peace staged construction people
Employee's effect；Temporary Ventilation refrigerating plant puts into operation, instead of the buying and use of live interim air-conditioning, axial flow blower, dehumidifier, drop
The low interim items purchase cost in scene, reduces daily gadget maintenance work amoun.
Embodiment two
The embodiment of the invention provides a kind of for the interim cooling supply of nuclear power plant nuclear island for cooling method, is suitable for, referring to figure
5, this method comprises:
External water source and/or recirculated water are delivered to air-cooled screw compressor water chiller by S100, intermediate interim circulation loop system；
Wherein, external water source is introduced in intermediate interim circulation loop system by opening desalination valve 401, while intermediate interim circulation
Circuit system also in acceptable system by heat exchange treated recirculated water；
S200, air-cooled screw compressor water chiller cool down external water source and/or recirculated water, form chilled water；Air-cooled spiral shell
Bar water cooler makes external water source and/or recirculated water and refrigerant carry out heat exchange using its inner evaporator, and coolant system absorbs
Thermic load in external water source and/or recirculated water makes external water source and/or circulating water cooling generate chilled water Hou ﹐ and passes through compression
The effect of machine makes heat take finned cooler to, then is lost in extraneous air by radiator fan, realize external water source and/
Or recirculated water is cooled；
Chilled water is delivered to containment continuous ventilating system by S300, intermediate interim circulation loop system；Wherein, conveying
Power can reserve pump offer by the interim water pump in intermediate interim circulation loop system；
The outside air that air inlet sucks is cooled down, and passes through inner fan by S400, containment continuous ventilating system
Outside air after cooling is delivered to each region of reactor building, the step for detailed process are as follows: by being arranged in RX factory
Air inlet outside room sucks outside air, and the strainer by being arranged in outside air inlet is filtered outside air, after filtering
Outside air carry out heat exchange with the chilled water for flowing through containment continuous ventilating system, outside air is cooled after heat exchange；
S500, intermediate interim circulation loop system will carry out the chilled water after heat exchange with outside air and be delivered to wind again
Cold screw water cooling machine set is cooled down；Chilled water realizes circulation in intermediate interim circulation loop system and air-cooled screw compressor water chiller
It is cooling, for saving the usage amount of chilled water；
Before step S300 further include: judge chilled-water flow, when it is less than preset value, executes step S600, lead to
It crosses control unit air-cooled screw compressor water chiller is stopped transport, for ensureing equipment safety；When it is not less than preset value, step is executed
S300.Wherein, the preset value of chilled water is that equipment allows minimum flow value.
Wherein, it influences equipment to avoid inner wall of the pipe from corroding during system operation and operates normally, open desalination valve
401, tertiary sodium phosphate is added in chilled water, is the demineralized water that pH value is 9 by water quality adjustment, make inner wall of the pipe formed passivating film from
And the corrosion of inner wall of the pipe is reduced, and using stainless steel pipes as intermediate interim circulation loop pipeline, to reduce the anti-of pipeline
Corruption protection and water quality adjustment work.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
In conclusion a kind of cooling apparatus and side for the interim cooling supply of nuclear power plant nuclear island provided in an embodiment of the present invention
Method, by intermediate interim circulation loop by running the region RX heat in containment continuous ventilating system and air-cooled screw cold water
It is transmitted between unit, solves existing PWR nuclear power plant because DEG/EVR/RRI/SEC system cannot put into operation simultaneously, cannot achieve machine
It sets up peace stage RX zonal ventilation refrigeration to put into operation, therefore can not effectively solve the problems, such as that the region RX temperature and humidity is high, dust is high.The present invention
The peace stage is built in nuclear power unit and realizes that RX zonal ventilation refrigeration puts into operation in advance, is reduced the region RX temperature and humidity and dust concentration, is realized
Nuclear power unit builds peace stage people because of environment and the double promotions of work efficiency.Apparatus of the present invention after it puts into operation, each region of reactor building
Actual temperature is 26 degree or so, and 8 degree low compared to ambient temperature or so, construction environment is relatively comfortable；In addition the present invention is logical
Wind refrigeration puts into operation the time more using unit about 167 days in advance of this method and device, shortens ventilation refrigeration and puts into operation the time；Together
When solve DEG/EVR/RRI/SEC system while putting into operation after, internal system equipment is required to participate in operation, increases and equipment and is
The problem of daily O&M cost of uniting；Invention replaces the buying and use of live interim air-conditioning, axial flow blower, dehumidifier, drops
The low interim items purchase cost in scene, reduces daily gadget maintenance work amoun；The present invention is sucked outer by air inlet simultaneously
The portion region air displacement RX inner air can complete inner air displacement in the region RX in one hour, the region RX powder is effectively reduced
Dust concentration；Temperature and humidity and dust concentration inside the region RX, and region inner air humidity are further reduced by the setting of strainer
Low compared with external environment humidity 10% or so, reduce the number that equipment is damaged because ambient humidity is big；Realize the same of to maintain equipment
When reduce construction personnel's security protection cost, elevator set up peace staged construction personnel work efficiency, reach nuclear power unit and build the peace stage
People is because of environment and the double promotions of work efficiency.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cooling apparatus for the interim cooling supply of nuclear power plant nuclear island, including containment continuous ventilating system (100), feature
It is, further includes:
Chilled water system (20) connects the containment continuous ventilating system (100), for external water source and/or recirculated water
It is cooled down, chilled water after cooling is delivered to the containment continuous ventilating system (100) to reduce reactor building not
With the temperature and humidity in region；
Air inlet (103) is arranged outside reactor building, for may filter that extracts outdoor air and continuous through the containment
The different zones of ventilating system (100) the extremely reactor building are to reduce dust concentration.
2. cooling apparatus according to claim 1, which is characterized in that the chilled water system (20) includes:
Air-cooled screw compressor water chiller (200) connects external water source, for by heat exchange to external water source and/or recirculated water into
Row cooling；
Intermediate interim circulation loop system (300), connects the air-cooled screw compressor water chiller (200), for being controllably wind
Cold screw water cooling machine set (200) provides recirculated water.
3. cooling apparatus according to claim 2, which is characterized in that interim circulation loop system (300) packet in centre
Control unit (301) and water flow switch (302) are included, described control unit (301) is separately connected the air-cooled screw cooling-water machine
Group (200) and water flow switch (302), for closing water flow when judging that chilled-water flow is less than preset value in pipeline
Amount switch (302), while instruction of stopping transport is issued to the air-cooled screw compressor water chiller (200).
4. cooling apparatus according to claim 3, which is characterized in that the interim circulation loop system (300) in centre is also
Including interim water pump (303), it is separately connected the containment continuous ventilating system (100) and the air-cooled screw compressor water chiller
(200), connect for extracting external water source and/or recirculated water from the air-cooled screw compressor water chiller (200) to the containment
Continuous ventilating system (100), and will extract to the external water source and/or recirculated water weight of the containment continuous ventilating system (100)
It is new to extract to the air-cooled screw compressor water chiller (200), realize external water source and/or recirculated water in the containment continuous ventilating
It is circulated between system (100) and the air-cooled screw compressor water chiller (200)；
The input terminal and output end of the interim water pump (303) are connected respectively an interim control valve of water pump (307), are used for
When the interim water pump (303) is broken down, by closing the interim control valve of water pump (307) for the interim water pump
(303) it is isolated, the interim water pump (303) is overhauled to be isolated after intercycle loop medium.
5. cooling apparatus according to claim 4, which is characterized in that the interim circulation loop system (300) in centre is also
Including two pressure gauges (305) and strainer (306), two pressure gauges (305) are separately positioned on the interim water pump (303)
Entrance and exit, for showing the real time execution parameter of interim water pump, the strainer (306) is arranged in the interim water
Pump the entrance of (303), the impurity for filter freezing water.
6. the cooling apparatus of interim cooling supply according to claim 5, which is characterized in that the cooling device further includes exhaust
Valve (601), drain valve (602) and exhaust auxiliary valve (603), draining auxiliary valve (604), described exhaust valve (601) one end connect
The interim circulation loop system (300) in the centre is connect, the other end connects external environment, for gas to be discharged into atmosphere；The row
Water valve (602) one end connects the interim circulation loop system (300) in centre, and the other end connects catch-basin, is used for chilled water
It is discharged into catch-basin；The exhaust auxiliary valve (603) one end connects the interim circulation loop system (300) in centre, and the other end connects
It connects the exhaust valve (601), the draining auxiliary valve (604) one end connects the interim circulation loop system (300) in centre, separately
One end connects the drain valve (602), and the exhaust auxiliary valve (603) and the draining auxiliary valve (604) are used cooperatively, are used for
The interior media for emptying the water loop system (300) prevents negative pressure occur inside pipeline and equipment.
7. the cooling apparatus of interim cooling supply according to claim 6, which is characterized in that the interim circulation loop system in centre
System (300) further includes reserve pump (304), and the reserve pump (304) is in parallel with interim water pump (303), for improving
The reliability and maintenance convenience of intermediate interim circulation loop system；Reserve pump (304) the inlet end and an outlet end difference
Equipped with a reserve pump control valve (308), each reserve pump control valve (308) is used to work as the reserve pump
(304) when breaking down, the reserve pump (304) are isolated by closing the reserve pump control valve (308), so as to
The reserve pump (304) are overhauled after intercycle loop medium is isolated.
8. the cooling apparatus of interim cooling supply according to claim 1, which is characterized in that air inlet (103) setting exists
Predetermined height above containment continuous ventilating system (100) bottom, impacts site operation for avoiding, the suction
Filter screen (104) are provided at air port (103), for the dust in filtering external air.
9. the cooling apparatus of interim cooling supply according to claim 1, which is characterized in that the containment continuous ventilating system
It (100) further include inner fan (101) and heat exchanger (102)；The heat exchanger (102) is used to inhale the air inlet (103)
The outside air entered is cooling；The inner fan (101) is used to outside air after cooling being delivered to each area of reactor building
Domain.
10. a kind of as described in claim 1 for the cooling apparatus of the interim cooling supply of nuclear power plant nuclear island for cooling method, feature
It is, including following processing step:
External water source and/or recirculated water are delivered to air-cooled screw compressor water chiller by S100, intermediate interim circulation loop system；
S200, air-cooled screw compressor water chiller cool down external water source and/or recirculated water, form chilled water；
Chilled water is delivered to containment continuous ventilating system by S300, intermediate interim circulation loop system；
S400, containment continuous ventilating system pass through the outside air that the air inlet sucking of predetermined altitude is arranged in, and by changing
Hot device cools down the outside air of sucking, and outside air after cooling is delivered to reactor building by inner fan
Each region, the step for detailed process are as follows: via air inlet sucking outside air and flow through containment continuous ventilating system
Chilled water carry out heat exchange, outside air is cooled after heat exchange；
S500, intermediate interim circulation loop system will carry out the chilled water after heat exchange with outside air and be delivered to air-cooled spiral shell again
Bar water cooler is cooled down；
Before step S300 further include:
Judge chilled-water flow, when it is less than preset value, executes step S600, passes through control unit for air-cooled screw cooling-water machine
Group is stopped transport, and when it is not less than preset value, executes step S300.
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