CN106531267A - Drainage system and method for underground nuclear power plant cavern group - Google Patents
Drainage system and method for underground nuclear power plant cavern group Download PDFInfo
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- CN106531267A CN106531267A CN201610767102.5A CN201610767102A CN106531267A CN 106531267 A CN106531267 A CN 106531267A CN 201610767102 A CN201610767102 A CN 201610767102A CN 106531267 A CN106531267 A CN 106531267A
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- isolating valve
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/04—Pumping arrangements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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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
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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)
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Abstract
The invention discloses a drainage system and a drainage method for an underground nuclear power plant cavern group. The drainage method comprises the steps that accumulated water in an underground nuclear power plant cavern flowing out via a drainage hopper is monitored by means of a radioactivity monitor, a controller shuts off a first isolation valve when the radioactivity monitor monitors that the accumulated water is radioactive, the controller opens a second isolation valve, the radioactive accumulated water enters a drainage branch associated with radioactivity, and is discharged into a siphon well after being treated by a radioactive substances treatment room; when the radioactivity monitor does not monitor that the accumulated water is radioactive, the controller shuts off the second isolation valve and opens the first isolation valve, and the non-radioactive accumulated water is discharged into the siphon well; and the accumulated water is discharged to rivers outside a mounting by means of the siphon well. According to the drainage system and the drainage method, the passive drainage system is constructed by utilizing a siphon pipeline and the siphon well, negative pressure formed in a siphon device forces water in the pipeline to flow under pressure, the flow velocity is accelerated, the drainage effect is good, and the drainage system can discharge the accumulated water out of the underground cavern in an organized and efficient manner regardless of accidental water accumulation or serious accident conditions.
Description
Technical field
The invention belongs to underground technical field of nuclear power, and in particular to a kind of underground nuclear power station cavity group drainage system and side
Method.
Background technology
Underground nuclear power station arranges multiple caverns in underground or massif and accommodates reactor building and other auxiliary plants, utilizes
Last one physical barrier of the natural rock mass as depth defense principle, ensures reactor safety.
Underground chamber is communicated with external environment by inlet and outlet piping, vent and discharge duct, and the presence of these passages can
Can cause surprisingly to intake in cavern, if water inlet can not be discharged in time, cavern's internal water accumulation will be caused, the possibility that there is water logging,
Affect the normal operation of each system and equipment, when causing major accident engineered safeguards features cannot normal response, threaten nuclear power
Stand safe；When reactor occurs major accident, containment may rupture, or even failure, and carrying radioactive coolant will flow to
Reactor cavern, causes cavern's internal water accumulation, not only threatens cavern, the safety of equipment, and radioactivity hydrops can be to reactor hole
Outdoor rock mass is migrated, and polluted underground water body causes serious environmental pollution.
The water discharge method of current ground Nuclear Power Station Factory Building, mainly for the situation of heavy showers, using hydrocone type rain water on roof
Drainage system excludes rain water on roof, so as to avoid rainwater from entering inside Factory Building, by installations and facilities in Factory Building and extraneous rainwater environment
Isolation.
Subsoil water is in an organized way drained by drainage system by the draining of underground engineering using the method dredged, to weaken water
Pressure to underground structure, reduces osmosiss of the water to structure, so as to aid in underground engineering to reach waterproof purpose.Conventional row
Water method for oozing draining, will the water that oozes out of water layer, flowed in sump by collector pipe, machine carried out using Special water pump then
Tool draining.But the infiltration in rock mass water layer can only be concentrated and be dredged discharge by this mode for oozing row, it is impossible to discharge in time and exist
A large amount of hydrops in cavern.
There is the possibility containing radioactivity, polluted underground water in underground nuclear power station cavern internal water accumulation, thus can not simply according to
Existing underground engineering drainage system and method is removed, the handling problems of special consideration radioactivity hydrops are needed.
The content of the invention：
In order to overcome the defect of above-mentioned background technology, the present invention to provide a kind of underground nuclear power station cavity group drainage system and side
Cavern's internal water accumulation is quickly discharged by method using siphoning installation, can also carry out organized free-draining under extreme accident.
In order to solve above-mentioned technical problem the present invention the technical scheme for being adopted for：
A kind of underground nuclear power station cavity group drainage system, is provided with several pumping monitoring isolation dresses in underground nuclear power station cavern
Put, the pumping monitoring isolating device includes the drain bucket for being arranged on the cavern, the output pipe of the drain bucket is connected with
Tie point and the second branch road, the tie point are provided with the first isolating valve, and second branch road is provided with the second isolating valve；It is described
It is additionally provided with the output pipe of drain bucket for monitoring whether draining has radioactive radiological monitor, the radioactivity prison
Survey device and be connected to controller, two signal output parts of the controller connect respectively first isolating valve and described second every
From the control end of valve；The tie point connection is not directed to radioactive draining branch road, and the second branch road connection is related to radiation
The draining branch road of property；It is described to be not directed to radioactive draining branch road and connect with the entrance of siphonic water-collecting well, it is described to be related to radioactive row
Water branch road is connected with the entrance of radioactivity office treatment, and the outlet of the radioactivity office treatment is connected with the entrance of the siphonic water-collecting well；
The outlet connection discharge tube of the siphonic water-collecting well.
It is preferred that several pumping monitoring isolating devices are laid in control, diesel engine, maintenance air-conditioning cavern, nuclear reaction respectively
Heap cavern, offal treatment cavern, steam turbine cavern, Fa Zha caverns, the nuclear reactor cavern are provided with described at least two
Several pumping monitoring isolating devices.
It is preferred that the discharge tube of the siphonic water-collecting well includes the natural discharge tube for being connected to the siphonic water-collecting well outlet
With power discharge tube, the natural discharge tube is connected to the position of the siphonic water-collecting well outlet and is provided with the 3rd isolating valve, described
Power discharge tube is connected to the position of the siphonic water-collecting well outlet and is provided with the 4th isolating valve；Also include water level monitor, the water
Position monitor is connected to the controller, and two signal output parts of the controller connect the 3rd isolating valve and institute respectively
State the control end of the 4th isolating valve.
It is preferred that the natural discharge tube is directly connected with river outside massif, the natural discharge tube is from connection
In the port of the 3rd isolating valve to be connected to outside massif between the port in river have downward gradient.
It is preferred that the power discharge tube is connected with river outside massif by draining pump, the entrance of the draining pump
Connect the 4th isolating valve, river outside the outlet connection massif of the draining pump.
It is preferred that the radioactivity office treatment is arranged on underground, between the radioactivity office treatment and the siphonic water-collecting well
The 5th isolating valve is additionally provided with pipeline.
The present invention also provides the underground nuclear power station cavity group water discharge method that a kind of utilization said system is carried out：
The hydrops in the underground nuclear power station cavern flowed out to drain bucket described in Jing are carried out with the radiological monitor
Monitoring,
When monitoring that hydrops have radioactivity, the controller cuts out first isolating valve, and opens the second isolation
Valve, is related to radioactive draining branch road with radioactive hydrops into described, and via the disposal of radioactive substances room at
The siphonic water-collecting well is entered after putting；
When being not detected by hydrops and having radioactivity, the controller cuts out the second isolating valve, and opens the first isolating valve,
Not there are radioactive hydrops to enter the siphonic water-collecting well；
The hydrops Jing siphonic water-collecting wells are discharged into outside massif in river.
It is preferred that when the water level that the water level monitor detects purpose discharge areas is higher than preset value, the control
Device cuts out the 3rd isolating valve, and opens the 4th isolating valve, hydrops power discharge by described in the draining pump Jing
Discharge of pipes is into river outside massif；
When the water level that the water level monitor detects purpose discharge areas is not higher than the preset value, the controller
The 4th isolating valve is closed, and opens the 3rd isolating valve, natural discharge tube is emitted into massif described in the hydrops Jing
In outside river.
It is preferred that when the nuclear reactor cavern occurs major accident, closing the 5th isolating valve, by high radioactivity
Hydrops are isolated in radioactivity and dispose indoor.
The beneficial effects of the present invention is：The product of radioactive substance is contained by pumping monitoring isolating device to each cavern
Water carries out individual processing, to ensure draining quality；Different cavern's draining branch circuit parallel connections are arranged and relate to put and put siphon row with non-relating to
Water branch circuit parallel connection is arranged, it is to avoid the migration of radionuclide, reduces the pressure that radioactive substance is processed, and improves drainage efficiency；
Combined by active power discharge tube and passive natural discharge tube, tackle the outer different water of massif
Position situation, ensures nuclear plant safety operation.When extraneous water level is relatively low, the passive free-draining of total system improves the peace of nuclear power station
Quan Xing；When extraneous water level is higher, siphon drainage branch road is passive to be discharged to siphonic water-collecting well by hydrops, and power set are by water in siphonic water-collecting well
The discharge outlet higher than design flood level is discharged to, prevents river from pouring in down a chimney, ensure the safety of facilities and equipment in cavern.
During major accident, radioactivity office treatment accommodates the high radioactivity hydrops flowed out from cavern, is isolated, at wait
Reason, prevents the diffusion of radionuclide, ensures the safety of the public, staff and environment；
The present invention utilizes siphon pipeline and siphonic water-collecting well to build the negative pressure formed in passive drainage system, siphoning installation and makes pipe
Water in road carries out pressure flow and moves, and accelerates flowing velocity, and drainage effect is good, either unexpected hydrops or major accident operating mode
Under, hydrops in an organized way, efficiently can be discharged underground chamber by drainage system.
Description of the drawings
Structural representations of the Fig. 1 for the embodiment of the present invention one；
In figure：1st, drain bucket；2nd, radiological monitor；3rd, the first isolating valve；4th, the second isolating valve；5th, output pipe；6、
It is not directed to radioactive draining branch road；7th, it is related to radioactive draining branch road；8th, radioactivity office treatment；9th, siphonic water-collecting well；10th, siphon
Wall；11st, the 3rd isolating valve；12nd, natural discharge tube；13rd, the 4th isolating valve；14th, power discharge tube；15th, draining pump；16、
5th isolating valve；17th, rhone；18th, river；19th, massif.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Embodiment one
A kind of underground nuclear power station cavity group drainage system, the underground nuclear power station cavern in massif 19 is arranged on are provided with several
Pumping monitoring isolating device, pumping monitoring isolating device include the drain bucket 1 for being arranged on cavern, and the output pipe 5 of drain bucket 1 connects
Tie point and the second branch road is connected to, tie point is provided with the first isolating valve 3, and the second branch road is provided with the second isolating valve 4；Drain bucket
It is additionally provided with 1 output pipe 5 for monitoring whether draining has radioactive radiological monitor 2, radiological monitor 2 connects
Controller is connected to, two signal output parts of controller connect the control end of the first isolating valve 3 and the second isolating valve 4 respectively；The
The connection of one branch road is not directed to radioactive draining branch road 6, and the connection of the second branch road is related to radioactive draining branch road 7；It is not directed to put
The draining branch road 6 of penetrating property is connected with the entrance of siphonic water-collecting well 9, is related to the entrance of radioactive draining branch road 7 and radioactivity office treatment 8
Connection, the outlet of radioactivity office treatment 8 are connected with the entrance of siphonic water-collecting well 9；The outlet connection discharge tube of siphonic water-collecting well 9, delivery pipe
Road is connected with 19 outside river 18 of massif.
Several pumping monitoring isolating devices be laid in respectively control, diesel engine, maintenance air-conditioning cavern, nuclear reactor cavern,
Offal treatment cavern, steam turbine cavern, Fa Zha caverns, nuclear reactor cavern are provided with least two several pumping monitoring isolation
Device.
In the case where there is major accident, in nuclear reactor cavern, may there be the radioactivity that cannot be discharged in time in a large number
Hydrops, radioactivity hydrops can be migrated to rock mass outside reactor cavern, polluted underground water body, cause environment to be subject to substantial pollution,
Therefore two pumping monitoring isolating devices are provided with nuclear reactor cavern, and the drain bucket 1 of two draining detection isolating devices is distinguished
Positioned at reactor both sides, to accelerate the drainage speed under major accident.Each drain bucket 1 individually guides a draining branch road into,
It is separate between each draining, do not interact, so as to reach the effect that each cavern's inner product water segregation gets up, to prevent
Radioactivity hydrops pollute "dead" hydrops, reduce discharge difficulty.
Drain bucket 1 is provided with cover plate, to keep the negative pressure state of 1 throat of drain bucket, makes stream of the current from its edge to center
Dynamic to accelerate, cover plate is provided with anti-whirlpool baffle plate, for preventing drain bucket 1 to be centrally formed whirlpool.
The discharge tube of siphonic water-collecting well 9 includes natural discharge tube 12 and the power discharge for being connected to the outlet of siphonic water-collecting well 9
Pipeline 14, natural discharge tube 12 are connected to the position of the outlet of siphonic water-collecting well 9 and are provided with the 3rd isolating valve 11, and power discharge tube 14 connects
The position for being connected to the outlet of siphonic water-collecting well 9 is provided with the 4th isolating valve 13；Also include water level monitor, water level monitor is connected to control
Device, two signal output parts of controller connect the control end of the 3rd isolating valve 11 and the 4th isolating valve 13 respectively.
Natural discharge tube 12 is directly connected with 19 outside river 18 of massif, natural discharge tube 12 from be connected to the 3rd every
From the port of valve 11 to be connected to outside massif between the port in river have downward gradient.Naturally drain the outlet of pipeline
Absolute altitude is slightly above ordinary water level, and the gradient for naturally draining pipeline is more than 5 ‰, is conducive to for 9 internal water accumulation of siphonic water-collecting well being discharged to river
18.The 3rd isolating valve 11 that pipeline initial position is arranged, state is normally opened, and flood level is higher than natural drainage water level outside the nuclear power station
When, controller triggers the 3rd isolating valve 11 and cuts out, and pipe end leads to 19 outside river of massif, 18 downstream.
Power discharge tube 14 is connected with 19 outside river 18 of massif by draining pump 15, the entrance of draining pump 15 connection the
Water is discharged to 19 outside river 18 of massif by a rhone 17 by four isolating valves 13, the outlet of draining pump 15.4th isolating valve
13 are located at pipeline initial segment, and state is normally closed, when flood level is higher than natural drainage water level outside the nuclear power station, controller triggering the 4th
13 unlatchings of isolating valve, draining pump 15 discharge after certain altitude for 9 internal water accumulation of siphonic water-collecting well are lifted, and power discharge tube 14 is last
End is connected with 19 outside river of massif by one section of rhone 17 diagonally downward；The spout elevation of dynamic drainage pipeline is higher than to set
Meter flood level, prevents river under flood operating mode from pouring in down a chimney and enters nuclear power station.
In the present embodiment, output pipe 5, tie point, the second branch road, it is not directed to radioactive draining branch road 6, is related to put
The draining branch road 7 of penetrating property, radioactivity office treatment 8, siphonic water-collecting well 9 and its between pipeline constitute siphon drainge system.In siphonic water-collecting well 9
There is siphon wall 10.Compared to conventional gravity drainage system, siphon drainge system drainage speed faster, drainage effect it is more preferable；Water
Flat transverse tube is the level of state, and is not required to arrange the gradient, convenient construction；Vertical VERTICAL TUBE caliber is little, quantity is few, is easy to process cloth
Put.
Being not directed to radioactive draining branch road 6 includes first level line segments, the first of each pumping monitoring isolating device
Branch road is all connected to horizontal tube section；Being related to radioactive draining branch road 7 includes the second horizontal tube section, each pumping monitoring every
The second horizontal tube section is all connected to from the second branch road of device.
Radioactivity office treatment 8 is arranged on underground, and other Factory Building caverns are identical with nuclear power station for its structure arrangement, and volume is not less than
The twice of containment liquid leakage amount during major accident, so that ensure can be by high radioactivity hydrops completely isolated in ground under major accident
Under, wait pending.
Pumping monitoring isolating device is connected to and is related to be provided with the second isolation on the second branch road of radioactive draining branch road 7
Valve 4, is related to the radioactive connection radioactivity of draining branch road 7 office treatment 8, and 4 state of the second isolating valve is normally closed, radiological monitor 2
When monitoring radioactive substance, to controller output signal, the second isolating valve 4 is opened by controller, and radioactivity office treatment 8 is located at
Branch road end, is connected with siphonic water-collecting well 9 by pipeline, for carrying out filtering to radioactivity hydrops, desalination or evaporation process and prison
Whether the hydrops radioactivity after survey is processed is up to standard.
The 5th isolating valve 16 is provided with pipeline between radioactivity office treatment 8 and siphonic water-collecting well 9, and reactor occurs serious thing
Therefore when, the 5th isolating valve 16 cuts out, and high radioactivity hydrops are stored separately in radioactivity office treatment 8, it is to avoid outside pollution massif
River water.
The present embodiment adopts passive siphon drainge system, drain bucket 1 to be located on each cavern bottom ground, by perpendicular
Straight output pipe 5 is connected with tie point and the second branch road, and radiological monitor 2 is located on output pipe 5, and described not relating to is put
Draining branch road is arranged in parallel with rafting water branch circuit parallel connection is related to, and extends branch road end by connecting pipe to underground deeper inside and leads to respectively
To siphonic water-collecting well 9.
As unexpected water inlet or major accident cause hydrops in underground nuclear power station cavern, when water accumulating volume is little, draining system
Gravity drainage is carried out in system, although gravity drainage it is limited in one's ability, but be enough to tackle water accumulating volume now；When water accumulating volume rapidly increases
Plus, hydrops are full of in drainage system pipe, no air is present, and will form siphonage, and in pipe, vacuum makes to be formed with pipeline
Hydrops in cavern are discharged rapidly by pressure flowing.
To be not directed to radioactive draining branch road 6 in the present embodiment drainage system, near branch road first level line segments
Short tube is diameter 90mm, the pipe of long 1m；
As shown in FIG., control, diesel engine, maintenance air-conditioning cavern are connected in first level line segments from left to right
Draining branch road, the first draining branch road of nuclear reactor cavern, the second draining branch road of nuclear reactor cavern, offal treatment hole
The draining branch road of room, steam turbine cavern draining branch road, Fa Zha caverns draining branch road.
The between control, diesel engine, the draining branch road of maintenance air-conditioning cavern and the first draining branch road of nuclear reactor cavern
A diameter of 110mm in one horizontal tube section, a length of 53m, the transverse tube after the first draining branch road of nuclear reactor cavern are a diameter of
200mm, overall length are 208m；A diameter of 160mm, a length of 20m of the latter linked vertical tube pipeline section of first level line segments；Lead to rainbow
Inhale horizontal transverse-pipe diameter 315mm, the long 1m of well 9.Each draining branch road can be individually formed siphon, quick hydrophobic.Following table is listed
Each branch road forms the hydrops volume that siphon needs：
The width of underground nuclear power station cavern be about 30m or so, length be 45～250m not etc., highly between 10～70m,
When cavern, inner product water depth reaches mm magnitudes, you can form siphon, accelerates the hydrops velocity of discharge, and active drainage is controlling in cavern
Depth of accumulated water, be conducive to ensureing cavern and equipment safety therein.
Drainage speed is relevant with the diameter of pipeline, length and material；Hydrops in siphon drainage branch road are under siphonage
Carry out pressure flow to move, caused energy loss, energy loss to be divided into frictional head loss and local head loss by drag effect.
Frictional head loss is caused due to the length of pipeline, and computing formula is
Wherein：For friction factor of head loss；
G=9.8m/s2For acceleration of gravity；
N=0.011 is steel tube surface roughness；
Hydraulic radiuses of the R=D/4 for pipe；
D is pipe diameter.
According to the pipeline geometric properties of the cavern layout and drainage system of underground nuclear power station, you can calculate each draining branch road
Frictional head loss non dimensional coefficient, respectively：
Local head loss is that flow section shape and direction are undergone mutation and caused fluid energy losses.Due to local
The size of the loss of flood peak is difficult to accurately calculating, simulates the local head loss of pipeline generally using test and empirical coefficient, this
Local head loss is obtained by determining the local loosening ξ of particular component in pipeline in embodiment.Tried according to engineering
Test summary, the local loosening of each part is following (when the wherein local loosening ξ of isolating valve is valve wide open
Value)：
| Component names | 90 ° of elbows | Standard threeway | Isolating valve |
| ξ | 0.55 | 1 | 0.17 |
The frictional head loss of known pipeline and local head loss, can pass throughCalculate outlet pipe
The discharge coefficient μ of road systemc。
Pipe inner product water flow velocityThe gross head of pipeline is difference in height 21m that drain bucket 1 is arrived between siphonic water-collecting well 9,
I.e. drainage system siphon drainage speed is that, between 2.40～5.85m/s, water velocity is fast, and drainage effect is good.Can be by changing pipe
The diameter in road can control the drainage speed of drainage system with length.
Embodiment two
A kind of underground nuclear power station cavity group water discharge method：
The hydrops radiological monitor 2 in underground nuclear power station cavern flowed out to Jing drain buckets 1 is monitored,
When monitoring that hydrops have radioactivity, controller cuts out the first isolating valve 3, and opens the second isolating valve 4, has
Radioactive hydrops are entered and are related to radioactive draining branch road 7, and enter siphonic water-collecting well after disposing via radioactive substance office treatment
9；
When being not detected by hydrops and having radioactivity, controller cuts out the second isolating valve 4, and opens the first isolating valve 3, no
Put material draining branch road 6 and enter siphonic water-collecting well 9 by not relating to radioactive hydrops；
The externally discharged river 18 of hydrops Jing siphonic water-collecting wells 9.
Hydrops in siphonic water-collecting well 9 river 18 externally discharged in the following manner again：
When the water level that water level monitor detects purpose discharge areas is higher than preset value, controller opens the 4th isolating valve
13, and the 3rd isolating valve 11 is closed, hydrops are emitted in the river 18 of outside by 15 Jing power discharge tube 14 of draining pump；
When the water level that water level monitor detects purpose discharge areas is not higher than preset value, controller is opened the 3rd and is isolated
Valve 11, hydrops Jing nature discharge tubes 12 are emitted into the river 18 of outside.
Control, diesel engine, maintenance air-conditioning cavern, nuclear reactor cavern, offal treatment hole are laid in by several respectively
Room, steam turbine cavern, the pumping monitoring isolating device of Fa Zha caverns discharge hydrops, and nuclear reactor cavern is provided with least two numbers
Individual pumping monitoring isolating device.
In the case where there is major accident, in nuclear reactor cavern, may there be the radioactivity that cannot be discharged in time in a large number
Hydrops, radioactivity hydrops can be migrated to rock mass outside reactor cavern, polluted underground water body, cause environment to be subject to substantial pollution,
Therefore two pumping monitoring isolating devices are provided with nuclear reactor cavern, and the drain bucket 1 of two draining detection isolating devices is distinguished
Positioned at reactor both sides, to accelerate the drainage speed under major accident.Each drain bucket 1 individually guides a draining branch road into,
It is separate between each draining branch road, do not interact, so as to reach the effect that each cavern's inner product water segregation gets up, with
Prevent radioactivity hydrops from polluting "dead" hydrops, reduce discharge difficulty.
Be provided with the 5th isolating valve 16, when there is major accident in nuclear reactor, controller close radioactivity office treatment 8 with
High radioactivity hydrops are stored separately in radioactivity office treatment 8 by the 5th isolating valve 16 on the pipeline between siphonic water-collecting well 9, it is to avoid
River water outside pollution massif.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (9)
1. a kind of underground nuclear power station cavity group drainage system, it is characterised in that：Several draining prisons are provided with underground nuclear power station cavern
Isolating device is surveyed, the pumping monitoring isolating device includes the drain bucket (1) for being arranged on the cavern, drain bucket (1)
Output pipe (5) is connected with tie point and the second branch road, and the tie point is provided with the first isolating valve (3), described second
Road is provided with the second isolating valve (4)；It is additionally provided with the output pipe (5) of drain bucket (1) and puts for monitoring draining and whether having
The radiological monitor (2) of penetrating property, radiological monitor (2) are connected to controller, and two signals of the controller are defeated
Go out the control end that end connects the first isolating valve (3) and second isolating valve (4) respectively；The tie point connection is not related to
And radioactive draining branch road (6), second branch road connection is related to radioactive draining branch road (7)；It is described to be not directed to radiation
Property draining branch road (6) connect with the entrance of siphonic water-collecting well (9), radioactive draining branch road (7) and the radioactivity of being related to is disposed
The entrance connection of room (8), the outlet of radioactivity office treatment (8) are connected with the entrance of the siphonic water-collecting well (9)；The siphonic water-collecting well
(9) outlet connection discharge tube.
2. a kind of underground nuclear power station cavity group drainage system according to claim 1, it is characterised in that：Several pumping monitorings
Isolating device is laid in control, diesel engine, maintenance air-conditioning cavern, nuclear reactor cavern, offal treatment cavern, steam turbine respectively
Cavern, Fa Zha caverns, the nuclear reactor cavern are provided with several pumping monitoring isolating devices described at least two.
3. a kind of underground nuclear power station cavity group drainage system according to claim 1, it is characterised in that：The siphonic water-collecting well
(9) discharge tube includes being connected to natural discharge tube (12) and the power discharge tube that the siphonic water-collecting well (9) is exported
(14), natural discharge tube (12) are connected to the position that the siphonic water-collecting well (9) exports and are provided with the 3rd isolating valve (11), described
Power discharge tube (14) is connected to the position that the siphonic water-collecting well (9) exports and is provided with the 4th isolating valve (13)；Also supervise including water level
Device is surveyed, the water level monitor is connected to the controller, two signal output parts of the controller connect described the respectively
Three isolating valves (11) and the control end of the 4th isolating valve (13).
4. a kind of underground nuclear power station cavity group drainage system according to claim 3, it is characterised in that：It is described to discharge naturally
Pipeline (12) is directly connected with river outside massif, and natural discharge tube (12) are from being connected to the 3rd isolating valve (11)
Port to be connected to outside massif between the port in river have downward gradient.
5. a kind of underground nuclear power station cavity group drainage system according to claim 3, it is characterised in that：The power discharge
Pipeline (14) is connected with river outside massif by draining pump (15), entrance connection the 4th isolation of draining pump (15)
Valve (13), river outside the outlet connection massif of draining pump (15).
6. a kind of underground nuclear power station cavity group drainage system according to claim 5, it is characterised in that：At the radioactivity
Put room (8) and be arranged on underground, be additionally provided with the pipeline between radioactivity office treatment (8) and the siphonic water-collecting well (9) the 5th every
From valve (16).
7. the underground nuclear power station cavity group water discharge method that a kind of utilization system as described in any one of claim 1-6 is carried out, which is special
Levy and be：
The hydrops in the underground nuclear power station cavern flowed out to drain bucket described in Jing (1) are entered with the radiological monitor (2)
Row monitoring,
When monitoring that hydrops have radioactivity, the controller cuts out the first isolating valve (3), and opens the second isolating valve
(4), it is related to radioactive draining branch road (7) into described with radioactive hydrops, and via the radioactive substance office treatment
(8) siphonic water-collecting well (9) is entered after disposing；
When being not detected by hydrops and having radioactivity, the controller cuts out the second isolating valve (4), and opens the first isolating valve
(3), the siphonic water-collecting well (9) is not entered with radioactive hydrops；
Hydrops Jing siphonic water-collecting wells (9) are discharged into outside massif in river.
8. a kind of underground nuclear power station cavity group water discharge method according to claim 7, it is characterised in that：
When the water level that the water level monitor detects purpose discharge areas is higher than preset value, the controller opens described the
Four isolating valves (13), closing the 3rd isolating valve (11), hydrops power delivery pipe by described in the draining pump (15) Jing
Road (14) is emitted into outside massif in river；
When the water level that the water level monitor detects purpose discharge areas is not higher than the preset value, the controller is opened
3rd isolating valve (11), closing the 4th isolating valve (13), natural discharge tube (12) discharge described in the hydrops Jing
To massif in river.
9. a kind of underground nuclear power station cavity group water discharge method according to claim 7 or 8 any one, it is characterised in that：When
When the nuclear reactor cavern occurs major accident, the 5th isolating valve (16) is closed, high radioactivity hydrops is isolated in and is put
In penetrating property office treatment (8).
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