CN105047237B - The passive Spent Fuel Pool spray cooling system of active combination and its control method - Google Patents
The passive Spent Fuel Pool spray cooling system of active combination and its control method Download PDFInfo
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- CN105047237B CN105047237B CN201510430551.6A CN201510430551A CN105047237B CN 105047237 B CN105047237 B CN 105047237B CN 201510430551 A CN201510430551 A CN 201510430551A CN 105047237 B CN105047237 B CN 105047237B
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- water
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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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Abstract
The invention belongs to nuclear reactor safety technical fields, and in particular to a kind of Spent Fuel Pool spray cooling system that active combination is passive and its control method.Active water charging system and heat exchanger are mostly used to the spentnuclear fuel pond in reactor in the prior art and just lose safety guarantee once there is dynamical problem, more serious nuclear accident is caused to occur.The passive Spent Fuel Pool spray cooling system of active combination provided by the present invention, including pipeline of fetching water, spray head and valve on the intake pipe road are set, the fire plant being connected with the water intaking pipeline, further include the high water tank that setting aloft and with the water intaking pipeline is connected, the level alarm for water being connected with the valve, fire plant.The system may be used active and passive two ways and carry out moisturizing cooling to spentnuclear fuel pond, greatly improve the safety in spentnuclear fuel pond.
Description
Technical field
The invention belongs to nuclear reactor safety technical fields, and in particular to a kind of Spent Fuel Pool that active combination is passive
Spray cooling system and its control method.
Background technology
Spentnuclear fuel is also known as rradiated nuclear fuel, is to live through radiation exposure, used nuclear fuel, typically by nuclear power station
Nuclear reactor generates.Spentnuclear fuel has high radioactive, water performance in terms of radiation-screening and heat dissipation all well and good (for that
For the radiation released a bit by spentnuclear fuel, the water of every 7 centimetres of depths can halve amount of radiation), thus spentnuclear fuel is stored
It, just can be from spentnuclear fuel pond after radioactive substance active degree therein reduces to a certain extent in the bottom of Spent Fuel Pool
In be transferred out and do subsequent processing.
After Fukushima, Japan nuclear power plant accident, the Spent Fuel Pool of multiple units is temporarily lost within the quite a long time
Cooling ability, and Spent Fuel Pool water temperature is caused to increase extremely, therefore the safety of Spent Fuel Pool causes domestic outer core
The extensive concern of electric industry circle.And currently, the cooling of Spent Fuel Pool mainly passes through active water charging system and heat exchanger.
It after nuclear power station generation accident, may cause to lose the concurrent accident such as electric energy outside factory, cause Spent Fuel Pool to be lost cold
But, it or leaks, active water charging system, heat exchanger and water level monitoring system are likely to use.If after accident
It cannot be cooled down or be supplemented in long-time, sump water temperature can be caused to rise, moisture constantly evaporates, water level tide, even
Irradiated fuel assembly is down to hereinafter, leading to exposed irradiated fuel assembly, overheat and damage, there are the risks of radioactive substance release.
Invention content
For the cooling of current Spent Fuel Pool and the defect of water supplement technology, it is necessary to a kind of passive and active phase knot of design
The cooling system of conjunction, accident etc. in special circumstances (such as lack or mismatched contact supply situation), can be when longer
In provided for equipment such as Spent Fuel Pools continue, it is reliable cool and moisturizing, avoid irradiated fuel assembly because of cooling water
Reduction caused by nuclear accident.
To achieve the above objectives, the technical solution adopted by the present invention is a kind of Spent Fuel Pool that active combination is passive spray
Cooling system, including water intaking pipeline are drenched, spray head and valve on the intake pipe road are set, are connected with the water intaking pipeline
Fire plant, further include setting aloft and with the high water tank that is connected of water intaking pipeline, with the valve, fire plant
Connected level alarm for water.
Further, the water intaking pipeline includes the first water intaking pipeline being connected with the high water tank, is filled with the fire-fighting
Set the second connected water intaking pipeline.
Further, the valve includes the first valve being arranged on first intake pipe road, is arranged described second
Second valve of intake pipe road.
Further, the level alarm for water includes stator, float, alarm signal generator and accumulator.
Further, the stator, float can contact with each other or are isolated with the lifting of water level.
Further, as the stator, float contact with each other or be isolated, the alarm signal generator can carry out
Alarm releases alarm, and the signal generated by alarm signal generator controls unlatching or the pass of the valve and fire plant
It closes.
To achieve the above objectives, the invention also discloses a kind of spentnuclear fuels passive for above-described active combination
The control method of pond spray cooling system, includes the following steps：
Level alarm for water sends out alarm, opens the second valve and fire plant；
Judge whether spray head is discharged, if be discharged, keeps standing state；If be not discharged, the first valve is opened；
Level alarm for water releases alarm, closes the valve having turned on, and closes fire plant.
Effect of the invention is that：
1. having active and passive two kinds of cooling water supplementing methods, electric power normally and under abnormal conditions can provide cold
But and water-refilling operation；
2. making full use of existing equipment and condition, cost is saved；
3. simple in structure, reliability is high.
Description of the drawings
Fig. 1 is for the passive Spent Fuel Pool spray cooling system arrangement of active combination in the specific embodiment of the invention
Schematic diagram；
In figure：1- high water tanks, 2- fire plants, 3- fuel plants, 4- nuclear island factory buildings, 5- Spent Fuel Pools, 6- first
Water intaking pipeline, the first valves of 7-, 8- irradiated fuel assemblies, 9- spray heads, 10- level alarm for water, 11- stators, 12- floats, 13-
Second water intaking pipeline, the second valves of 14-.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the Spent Fuel Pool spray cooling system that active combination provided by the invention is passive, including arrangement
High water tank 1 in 3 top of nuclear island factory building 4 or fuel plant, keeps the huge drop (at least 20 between Spent Fuel Pool 5
Rice), which provides the driving pressure of passive spray.Be arranged 5 side wall upper part of Spent Fuel Pool multiple spray heads 9 (
In the present embodiment, the even Spent Fuel Pool long side side wall that is arranged in of spray head 9 enables shower water to cover by specific angle
All irradiated fuel assemblies).It is connected by the first water intaking pipeline 6 between high water tank 1 and spray head 9, in the first water intaking pipeline 6
On be provided with DC power control water route opening and closing the first valve 7.
The passive Spent Fuel Pool spray cooling system of active combination provided by the invention further includes fire plant 2,
Employed in the present invention is the general fire plant of current nuclear power station, and fire plant 2 is by the second water intaking pipeline 13 with first
Pipeline 6 of fetching water is connected, and the second valve of DC power control water route opening and closing is provided on the second water intaking pipeline 13
Door 14, fire plant 2 can provide fire water to spray head 9 and carry out cooling and moisturizing to Spent Fuel Pool 5, fire plant 2
Power comes from air pressure tank and fire pump (not marked in figure).
The passive Spent Fuel Pool spray cooling system of active combination provided by the invention further includes level alarm for water
10, level alarm for water 10 includes stator 11, float 12 and alarm signal generator and accumulator (not marked in figure).
Sliding rail is arranged in the side wall of Spent Fuel Pool 5, and stator 11 is placed in one with float 12；Stator 11 is fixed on 5 side wall of Spent Fuel Pool
Upper (depending on the warning line highly set by Spent Fuel Pool 5), float 12 be limited in sliding rail (be located at stator 11 it
On) moved up and down with the liquid level in Spent Fuel Pool 5.Stator 11 and float 12 are equipped with contact (not marked in figure),
The contact of middle float 12 is higher than the water surface, avoids contacting with water, and when 5 water level decreasing of Spent Fuel Pool, float 12 is moved down with liquid level,
Level alarm for water 10 can be connected after stator 11 is in contact with both float 12 contacts.Level alarm for water 10 is the same as the first valve
Door 7 is connected with the second valve 14 and fire plant 2, and the opening and closing of controllable above equipment.Under normal circumstances, float
12, by buoyancy, separate with stator 11, at this time level alarm for water 10 and valve and not actuated, it is ensured that as direct current
The accumulator in source can work when needed；When the water level decreasing in Spent Fuel Pool 5, float 12 is moved down with liquid level, until
When being contacted with stator 11, level alarm for water 10 starts, and alarm signal generator generates signal, and triggers valve opening, starts
Fire plant 2, spray are opened, and cooling is provided for irradiated fuel assembly, ensure irradiated fuel assembly safety.In addition, in the present embodiment,
Accumulator is high-energy battery, is at least able to maintain that level alarm for water 10, the first valve 7, the second valve 14 are run 72 hours.
For the Spent Fuel Pool spray cooling system work for coordinating active combination provided by the invention passive, the present invention
The control method for also disclosing the passive Spent Fuel Pool spray cooling system of the active combination, includes the following steps：
S1：When stator, float are in contact, level alarm for water sends out alarm, opens the second valve and fire plant；
S2：Judge whether spray head is discharged, if be discharged, keeps standing state；If be not discharged, the first valve is opened
Door；
S3：When stator, float are isolated, level alarm for water releases alarm, closes the valve having turned on, and closes fire-fighting dress
It sets.
The reality of the passive Spent Fuel Pool spray cooling system of the active combination provided is finally provided
It applies on border.
Stator 11 is placed in setting on the side wall in the spentnuclear fuel pond 5 of nuclear power station and 12 sliding rail of float, stator are fixed on warning
Water level position, when 5 water level of spentnuclear fuel pond is higher than warning line, stator 11 and float 12 do not contact, and level alarm for water 10 is not
Work, the first valve 7 and the second valve 14 and fire plant 2 are closed；When 5 water level of spentnuclear fuel pond is less than warning water
When position, stator 11 and float 12 are in contact, and level alarm for water 10 begins through alarm signal generator and sends out alarm, simultaneously
It opens the second valve 14 and starts fire plant 2, under normal circumstances, fire plant 2 starts work to the electric power inside nuclear power station
Make and supplied water to spray head 9 by the second water intaking pipeline 13, is arranged to provide cooling for the irradiated fuel assembly 8 in spentnuclear fuel pond 5
It applies.If the supply of electric power in nuclear power station goes wrong, fire plant 2 can not work normally, and level alarm for water 10 can at once
The first valve 7 on the first water intaking pipeline 6 is opened, is installed in pinnacled (such as at the top of Nuclear Power Station Factory Building) high water tank 1
Water provides cooling for the irradiated fuel assembly 8 in spentnuclear fuel pond 5 by spray head 9 along the first water intaking pipeline 6 under the effect of gravity and arranges
It applies, to ensure that there is a situation where temperature is excessively high or is exposed to except the water surface for irradiated fuel assembly 8.When 5 water level of spentnuclear fuel pond
When coming back on warning line, stator 11 and float 12 detach, 10 stop alarm of level alarm for water, and control closing the
One valve 7 and the second valve 14 and fire plant 2.Accumulator can go wrong in external power, and fire plant 2 can not carry
In the case of Cooling Water, continue to level alarm for water 10, the first valve 7, the second valve 14 run 72 hours, to for
The longer time is striven in the processing of nuclear accident.
Device of the present invention is not limited to the embodiment described in specific implementation mode, those skilled in the art according to
Technical scheme of the present invention obtains other embodiments, for example, using the level alarm for water of other products, uses diesel generation
Machine extract material-changing water tank water source substitute the modifications of the present invention such as fire water supply and modification also belong to the claims in the present invention and its
Within the scope of equivalent technology, also belong to the scope of the technical innovation of the present invention.
Claims (4)
1. a kind of Spent Fuel Pool spray cooling system that active combination is passive, including water intaking pipeline, are arranged in the water intaking
Spray head (9) on pipeline and valve, the fire plant (2) being connected with the water intaking pipeline, it is characterized in that：Further include that setting exists
Eminence and the high water tank (1) being connected with the water intaking pipeline, the water-level alarm dress being connected with the valve, fire plant (2)
(10) are set, have active and passive two kinds of cooling water supplementing methods, electric power normally and under abnormal conditions can provide cooling
And water-refilling operation, the fire plant (2) they are the general fire plant of current nuclear power station, the fire plant (2) can be to institute
It states spray head (9) and fire water is provided；
The spray head (9) is even to be arranged on the side wall of Spent Fuel Pool, by specific angle, shower water is enable to cover institute
State irradiated fuel assembly all in Spent Fuel Pool；The high water tank (1) and the drop of the Spent Fuel Pool are not less than 20
Rice；
The level alarm for water (10) includes stator (11), float (12), alarm signal generator and accumulator；The stator
(11), float (12) can contact with each other or be isolated with the lifting of water level；As the stator (11), float (12) contact with each other
Or alarm can be alarmed or be released to isolation, the alarm signal generator, the signal generated by alarm signal generator
Control being turned on and off for the valve and fire plant (2).
2. the passive Spent Fuel Pool spray cooling system of active combination as described in claim 1, it is characterized in that：It is described to take
Water lines include the first water intaking pipeline (6) being connected with the high water tank (1), second to be connected with the fire plant (2)
Water intaking pipeline (13).
3. the passive Spent Fuel Pool spray cooling system of active combination as claimed in claim 2, it is characterized in that：The valve
Door includes first valve (7) of the setting on the first water intaking pipeline (6), and setting is on the second water intaking pipeline (13)
Second valve (14).
4. a kind of Spent Fuel Pool spray cooling system passive for the active combination described in claim 1-3 any one
Control method, include the following steps：
Step 1：Level alarm for water sends out alarm, opens the second valve and fire plant；
Step 2：Judge whether spray head is discharged, if be discharged, keeps standing state；If be not discharged, the first valve is opened
Door；
Step 3：Level alarm for water releases alarm, closes the valve having turned on, and closes fire plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430551.6A CN105047237B (en) | 2015-07-21 | 2015-07-21 | The passive Spent Fuel Pool spray cooling system of active combination and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430551.6A CN105047237B (en) | 2015-07-21 | 2015-07-21 | The passive Spent Fuel Pool spray cooling system of active combination and its control method |
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| Publication Number | Publication Date |
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| CN105047237A CN105047237A (en) | 2015-11-11 |
| CN105047237B true CN105047237B (en) | 2018-09-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427901A (en) * | 2015-12-10 | 2016-03-23 | 田力 | Pool type ordinary pressure heating reactor using spent fuel pool cooling device |
| CN107448831A (en) * | 2017-09-14 | 2017-12-08 | 上海核工程研究设计院有限公司 | A kind of fixed underwater lighting device for spent nuclear fuel in nuclear power plant pond and attached pond |
| CN109060319A (en) * | 2018-05-29 | 2018-12-21 | 华北电力大学 | A kind of experimental rig and method for nuclear power station spent fuel reservoir nozzle sensibility |
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| CN201570286U (en) * | 2009-11-25 | 2010-09-01 | 中科华核电技术研究院有限公司 | Reactor cavity injection system for nuclear power system |
| CN104183283A (en) * | 2013-05-22 | 2014-12-03 | 中国核电工程有限公司 | Passive containment cooling-water storage tank based on design of external interference |
| CN104172840A (en) * | 2014-09-09 | 2014-12-03 | 袁董瑶 | Water collecting cup which is provided with alarm device and can be used for automatically controlling water level |
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| CN201107091Y (en) * | 2007-09-28 | 2008-08-27 | 刘云志 | Water feed positioning alarm |
| CN202887749U (en) * | 2012-09-27 | 2013-04-17 | 中国核电工程有限公司 | Active and passive combined secondary side reactor core heat leading-out device |
| CN202887745U (en) * | 2012-09-27 | 2013-04-17 | 中国核电工程有限公司 | Active and passive combined safety shell heat extraction device |
| CN103928069B (en) * | 2013-01-14 | 2017-02-22 | 上海核工程研究设计院 | Containment built-in spent fuel pool |
| CN103440891B (en) * | 2013-09-10 | 2016-04-20 | 华北电力大学 | The non-active moisturizing spray system of Spent Fuel Pool |
| CN104575633A (en) * | 2013-10-12 | 2015-04-29 | 中科华核电技术研究院有限公司 | Passive water replenishment and heat export system for spent fuel pool |
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|---|---|---|---|---|
| CN201570286U (en) * | 2009-11-25 | 2010-09-01 | 中科华核电技术研究院有限公司 | Reactor cavity injection system for nuclear power system |
| CN104183283A (en) * | 2013-05-22 | 2014-12-03 | 中国核电工程有限公司 | Passive containment cooling-water storage tank based on design of external interference |
| CN104172840A (en) * | 2014-09-09 | 2014-12-03 | 袁董瑶 | Water collecting cup which is provided with alarm device and can be used for automatically controlling water level |
| CN204303363U (en) * | 2014-12-23 | 2015-04-29 | 福建福清核电有限公司 | A kind of Spent Fuel Pool emergency monitoring and water charging system |
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| CN105047237A (en) | 2015-11-11 |
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