CN105139902B - Safety injection system is pressed in a kind of nuclear power plant's modified - Google Patents
Safety injection system is pressed in a kind of nuclear power plant's modified Download PDFInfo
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- CN105139902B CN105139902B CN201510378319.2A CN201510378319A CN105139902B CN 105139902 B CN105139902 B CN 105139902B CN 201510378319 A CN201510378319 A CN 201510378319A CN 105139902 B CN105139902 B CN 105139902B
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- pipeline
- safety injection
- injection
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- power plant
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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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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The present invention relates to press safety injection system in a kind of nuclear power plant's modified.The system is made of two safety injection tanks and its corresponding connecting pipeline, injection pipeline and connecting pipeline and a series of valves.Two safety injection tanks are connected to by connecting pipeline, injection pipeline on nuclear power plant's reactor coolant loop respectively, and concatenated 2 motor-operated isolation valves and 2 check-valves are respectively arranged in every connecting pipeline.In two connecting pipelines between the position of safety injection tank bottom, it is equipped with the connecting pipeline, is set on connecting pipeline there are one motor-operated isolation valve.Every injection pipeline is equipped with detector, for detecting the cut on injection pipeline.Open state is in when motor-operated isolation valve normal operation in two connecting pipelines, when motor-operated isolation valve normal operation on connecting pipeline is closed.The present invention has higher value to the safety and economy that improve nuclear power plant.
Description
Technical field
The present invention relates to nuclear power technologies, and in particular to a kind of nuclear reactor safety injection system.
Background technology
Very important one is exactly safety injection system in nuclear power plant's engineered safeguards features.Safety injection system wherein one
A function is, to flood and cool down reactor core again, to limit the rising of fuel element temperature to reactor core water filling.Safety injection tank is (generally
A part for middle pressure safety injection system) as a kind of passive injection means, primary Ioops cut dehydration can occur in nuclear power plant
After accident, the coolant that quickly compensation is lost, every safety injection tank offer floods 50% of volume needed for reactor core.It is either passive
Or active nuclear power station, safety injection tank are all indispensable important peace water filling sources and accident mitigation means.
In existing middle pressure safety injection system design, either two loops or three-loop nuclear power plant, if connection safety injection tank with
Cut (or even reactor coolant loop generation cut) occurs on the pipeline of major loop, then the coolant of major loop loses from cut
It loses, and cut corresponds to the peace water filling forfeiture of safety injection tank, while increasing Core damage risk, leaves operator for and carry out accident mitigation
The time of operation also shortens relatively.
The present invention has higher value to the safety and economy that improve nuclear power plant.
Invention content
The needs that it is an object of the invention to be designed for nuclear plant safety provide in a kind of modified and press safety injection system,
When safety injection tank injection pipeline cut accident or major loop cut accident occur for nuclear power plant, the loss of peace water filling is reduced or avoided
Waste, the relief capabilities of enhancing nuclear power plant reply loss of-coolant accident (LOCA), improves the safety of nuclear power plant.
Technical scheme is as follows：
Safety injection system is pressed in a kind of nuclear power plant's modified, by two safety injection tanks and its corresponding connecting pipeline, injection pipeline
And connecting pipeline and a series of valves form.
Further, safety injection system, two safety injection tanks is pressed to pass through connection respectively in a kind of nuclear power plant's modified as described above
Pipeline, injection pipeline are connected on nuclear power plant's reactor coolant loop.Concatenated 2 are respectively arranged in every connecting pipeline
A motor-operated isolation valve and 2 check-valves.
Further, safety injection system is pressed in a kind of nuclear power plant's modified as described above, is noted close to peace in two connecting pipelines
Between the position in bottom portion, it is equipped with connecting pipeline.Motor-operated isolation valve there are one being set on connecting pipeline.
Further, safety injection system, every injection pipeline is pressed to be equipped with and visit in a kind of nuclear power plant's modified as described above
Device is surveyed, for detecting the cut on injection pipeline.
Further, safety injection system is pressed in a kind of nuclear power plant's modified as described above, it is electronic in two connecting pipelines
Open state is in when isolating valve normal operation, when motor-operated isolation valve normal operation on connecting pipeline is closed.
Beneficial effects of the present invention are as follows：(1) system can effectively avoid pair when safety injection tank injects pipeline loss of-coolant accident (LOCA)
The loss for pacifying water filling in pipeline safety injection tank is answered, the peace water injection rate into reactor coolant loop is increased, strengthens nuclear power plant
The ability for alleviating safety injection tank injection pipeline cut loss of-coolant accident (LOCA), enhances the safety of nuclear power plant；(2) system can automate reality
Isolation, the automation of existing cut safety injection tank injection pipeline realize that cut pipeline corresponds to the peace split stream of injected water of safety injection tank, can faster,
More effectively alleviate nuclear power plant's safety injection tank and injects pipeline cut loss of-coolant accident (LOCA)；(3) improving in tradition presses safety injection system encountering
The shortcoming of safety injection tank water depletion when safety injection tank injects pipeline cut loss of-coolant accident (LOCA) is beneficial to reduce in nuclear power plant's probabilistic safety analysis
Core damage frequency；(4) when safety injection tank injection pipeline cut loss of-coolant accident (LOCA) occurs, system can be held from trend reactor pressure
The more peace water fillings of device injection, while improving npp safety, when providing more abundant for operator's subsequent action
Between, be conducive to reduce people because of failure probability；(5) for the present invention by taking two loop plants as an example, same idea and method can be used for three
Loop (or other types) nuclear power plant, applicability and generalization are stronger.
Description of the drawings
Fig. 1 is to press safety injection system in tradition；
Fig. 2 is water filling schematic diagram when pressure safety injection system injects pipeline cut accident in tradition；
Fig. 3 is to press safety injection system in modified of the present invention；
Fig. 4 is water filling schematic diagram when pressure safety injection system injects pipeline cut accident in modified of the present invention.
Specific implementation mode
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is to press safety injection system in tradition.Two safety injection tanks 1 and 2 in Fig. 1 pass through connecting pipeline 3 and 4, injection respectively
Pipeline 11 and 12 is connected on reactor coolant loop 13.There are 1 motor-operated isolation valve and 2 in connecting pipeline 3 and 4 respectively only
Return valve.
Fig. 2 is water filling schematic diagram when pressure safety injection system injects pipeline cut accident in tradition.It can be seen from the figure that when note
When entering the generation cut 14 of pipeline 11, the peace water filling energy piii reactor coolant system 13 of safety injection tank 2, and the peace of safety injection tank 1 is noted
Water will be lost in from cut 14.Similarly, when injecting the generation cut of pipeline 12, the peace water filling of safety injection tank 2 will be lost in from cut.
Fig. 3 is to press safety injection system in nuclear power plant's modified of the present invention.Compared with pressing safety injection system in Fig. 1 tradition, modified
1 normally opened motor-operated isolation valve 7 and 8 is respectively increased in the connecting pipeline 3 and 4 of middle pressure safety injection system, injects on pipeline and respectively increases by 1
Cut detector assembly 13 and 14, increases connecting pipeline 18 between connecting pipeline 3 and 4, there are one normally closed on connecting pipeline 18
Motor-operated isolation valve 19.Normally opened motor-operated isolation valve 5 and 6 closes during normal shutdown when primary Ioops absolute pressure is less than 7.0MPa
It closes, prevents safety injection tank from injecting boron water to reactor coolant loop.Normally opened motor-operated isolation valve 5 and 7,6 and 8 in accident conditions,
It can judge to be automatically closed according to signal.
There is boron water in safety injection tank 1 and 2, the nitrogen for being about 4.2MPa with absolute pressure covers.Work as reactor coolant
When the pressure of system drops to safety injection tank pressure or less, boron water is injected into reactor pressure vessel descending branch, energy by nitrogen pressure
Reactor core is flooded in a short time, and fuel rod is avoided to melt.Each safety injection tank, which can provide, floods 50% of volume needed for reactor core.
As shown in figure 4, when injecting the generation cut of pipeline 15, detection device 13 detects the presence of cut first, normally opened
Motor-operated isolation valve 5 and 7 is automatically closed, and the normally closed motor-operated isolation valve 19 on connecting pipeline 18 automatically opens.Cut pipeline is corresponding
Peace water filling in safety injection tank 1 can be injected into reactor coolant loop 17 by 2 corresponding injection pipeline 16 of safety injection tank.Together
Reason, when injecting the generation cut of pipeline 16, detection device 14 detects the presence of cut, normally opened motor-operated isolation valve 6 and 8 automatic passes
It closes, the normally closed motor-operated isolation valve 19 on connecting pipeline 18 automatically opens.Peace water filling in the corresponding safety injection tank of cut pipeline 2 can be with
It is injected into reactor coolant loop 17 by 1 corresponding injection pipeline 15 of safety injection tank.In this way, no matter cut is happened at injection pipe
The water of line 15 or 16,2 safety injection tanks can be injected into reactor coolant loop, increase peace water filling when accident occurs
Injection rate.
Detection of the detector 13 and 14 on pipeline for cut is injected, accomplished in many ways can be passed through.One of which
Feasible method be consider when inject pipeline 15 or 16 on have cut when, it is different when the pressure at detector both ends is from normal operation.
When normal operation, the pressure of detector should be almost the same with reactor coolant loop (generally 15.5MPa).Cut occurs
When, the pressure at cut can decline rapidly, lead to rapid pressure drop on the pipeline.It then can be according to the detection for detecting certain one side
Device rapid pressure drop, such as decline and be more than 6MPa, then the pipeline is closed, the isolating valve 19 on connecting pipeline 18 is opened.
Be above for cut be happened at safety injection tank injection pipeline on when, in modified press safety injection system embodiment into
Capable explanation.When cut is happened on reactor coolant loop, the thinking of the design can also be used, by tradition
Safety injection system is pressed to increase the mode of detector, motor-operated isolation valve and connecting pipeline, safety injection tank is injected when increasing cut loss of-coolant accident (LOCA)
Peace water filling.
The present invention is to be designed improvement and explanation by taking two loop plants (2 safety injection tanks) as an example.For Three links theory (or
Other types) nuclear power plant's principle is identical, and it can also be by pressing safety injection system to increase detector, motor-operated isolation valve and company in tradition
The mode of take over line avoids corresponding to peace when injection pipeline cut or even reactor coolant loop cut loss of-coolant accident (LOCA), at cut
The forfeiture for pacifying water filling in case is noted, the safety of nuclear power plant is increased.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.If in this way, belonging to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention
Within enclosing, then the present invention is also intended to include these modifications and variations.
Claims (1)
1. pressing safety injection system in a kind of nuclear power plant's modified, it is characterised in that：The system is by two safety injection tanks and its corresponding
Connecting pipeline, injection pipeline and connecting pipeline and a series of valves composition, two safety injection tanks pass through respective connecting tube respectively
Line and injection pipeline are connected on nuclear power plant's reactor coolant loop, and concatenated 2 are respectively arranged in every connecting pipeline
A motor-operated isolation valve and 2 check-valves are equipped with the communicating pipe in two connecting pipelines between the position of safety injection tank bottom
Line is set on connecting pipeline there are one motor-operated isolation valve, and every injection pipeline is equipped with detector, for detection injection pipeline
Cut, when motor-operated isolation valve normal operation in two connecting pipelines is in open state, the electronic isolation on connecting pipeline
It is closed when valve normal operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378319.2A CN105139902B (en) | 2015-07-01 | 2015-07-01 | Safety injection system is pressed in a kind of nuclear power plant's modified |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378319.2A CN105139902B (en) | 2015-07-01 | 2015-07-01 | Safety injection system is pressed in a kind of nuclear power plant's modified |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105139902A CN105139902A (en) | 2015-12-09 |
| CN105139902B true CN105139902B (en) | 2018-10-12 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847451A (en) * | 2009-06-19 | 2010-09-29 | 中广核工程有限公司 | Safety injection system |
| CN102034559A (en) * | 2010-09-19 | 2011-04-27 | 中广核工程有限公司 | Rapid mutual-backup system of nuclear power station and mutual-backup method thereof |
| CN102903403A (en) * | 2012-09-27 | 2013-01-30 | 中国核电工程有限公司 | Active and non-active combined core water injection heat lead-out device |
| CN103578582A (en) * | 2012-08-03 | 2014-02-12 | 韩国原子力硏究院 | Hybrid safety injection tank system pressurized with safety valve of pressurizer |
| CN203596180U (en) * | 2013-09-06 | 2014-05-14 | 中国核电工程有限公司 | Emergency reactor core cooling system |
| CN103996418A (en) * | 2013-02-14 | 2014-08-20 | 韩国原子力研究院 | Multi stage safety injection device and passive safety injection system having the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101071415B1 (en) * | 2011-04-15 | 2011-10-07 | 한국수력원자력 주식회사 | High pressure safety injection tank system for loca and sbo |
| KR101389836B1 (en) * | 2012-08-16 | 2014-04-29 | 한국원자력연구원 | Separate type safety injection tank |
| KR101463441B1 (en) * | 2013-05-31 | 2014-11-21 | 한국원자력연구원 | High concentration boron injection system and safety injection system having the same |
-
2015
- 2015-07-01 CN CN201510378319.2A patent/CN105139902B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847451A (en) * | 2009-06-19 | 2010-09-29 | 中广核工程有限公司 | Safety injection system |
| CN102034559A (en) * | 2010-09-19 | 2011-04-27 | 中广核工程有限公司 | Rapid mutual-backup system of nuclear power station and mutual-backup method thereof |
| CN103578582A (en) * | 2012-08-03 | 2014-02-12 | 韩国原子力硏究院 | Hybrid safety injection tank system pressurized with safety valve of pressurizer |
| CN102903403A (en) * | 2012-09-27 | 2013-01-30 | 中国核电工程有限公司 | Active and non-active combined core water injection heat lead-out device |
| CN103996418A (en) * | 2013-02-14 | 2014-08-20 | 韩国原子力研究院 | Multi stage safety injection device and passive safety injection system having the same |
| CN203596180U (en) * | 2013-09-06 | 2014-05-14 | 中国核电工程有限公司 | Emergency reactor core cooling system |
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| Publication number | Publication date |
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| CN105139902A (en) | 2015-12-09 |
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