CN109427422A - A kind of dense boric acid injected system of emergency is as second set of reactor shut-off system of presurized water reactor - Google Patents
A kind of dense boric acid injected system of emergency is as second set of reactor shut-off system of presurized water reactor Download PDFInfo
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- CN109427422A CN109427422A CN201710753379.7A CN201710753379A CN109427422A CN 109427422 A CN109427422 A CN 109427422A CN 201710753379 A CN201710753379 A CN 201710753379A CN 109427422 A CN109427422 A CN 109427422A
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- boric acid
- dense
- reactor
- emergency shut
- dense boric
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/22—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of a fluid or fluent neutron-absorbing material, e.g. by adding neutron-absorbing material to the coolant
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention belongs to nuclear power plant's reactor design field, a kind of dense boric acid injected system of emergency is specifically designed as second set of reactor shut-off system.The system includes dense boron case, fills exhaust pump, fills row switch and connected pipeline, is a set of independent reactor shut-off system.Row switch is filled to be connected with reactor protection system; receive the shutdown signal of reactor protection system sending and realizes the injection of dense boric acid; injection switch energization magnet power-off; switch injects pipeline by the dense boric acid of gravity fall; when opening heap; helium is filled with flowing line using inflator pump, helium is powered full of rear drainage switch energization magnet, pipeline closing.Invention enhances the reliability of reactor emergency shut-down in the case of accident, the safety of reactor is improved, and the system is independent subsystem, does not influence the internal environment of reactor.
Description
Technical field
The invention belongs to nuclear power plant's reactor design fields, specifically design a kind of dense boric acid injected system conduct of emergency
Second set of reactor shut-off system.
Background technique
It requires in reactor relevant laws and regulations, is required in reactor associated safety regulation, shutdown means must be by two differences
System composition.Second set of reactor shut-off system is the depth defense means for preventing reactor protection system shutdown from failing.Two systems
In, at least one system can independently be exercised in single failure, keep reactor rapid from operating condition and accident conditions
Into the subcritical function of having enough depth.Even if in the case where reactor core has max-reserved reactivity situation, in two systems extremely
It is subcritical that a rare system can independently be such that reactor enters from accidental conditions, and with enough depth and high reliability
Keep subcritical state.
In nuclear power plant accident, realize that emergency shutdown is to protect the important prerequisite of reactor safety.Tradition is pressed
For water-water reactor design, the main realization means for shutdown of meeting an urgent need are that insertion is made to react by the control rod that neutron poison forms into reactor core
Heap immediately enters subcritical state.This process that emergency shut-down is realized by control rod is: reactor protection system is patrolled
Operation is collected, reactor emergency shut-down driving signal is generated, emergency shut-down driving signal makes shutdown breaker coil power loss, and shutdown is disconnected
Road device is opened, stick power loss, and control rod falls, reactor shutdown.There are control rods to be unable to underthrust for this emergency shut-down method
Reactor is caused to be unable to the Potential feasibility of emergency shut-down.
It include chemical volume control system in the reactivity control of pressurized-water reactor nuclear power plant, by adding boric acid into coolant
The boron concentration for adjusting primary Ioops water, so that reactivity be adjusted.Currently, traditional chemical volume control system can not be timely
Emergency boron injection is provided, also cannot achieve the injection of high concentration of boric acid, therefore, the hand that can only be adjusted as reactor capability
Section, can not be as a kind of means of shutdown of meeting an urgent need.
Summary of the invention
It is an object of the invention to defect in view of the prior art, a kind of dense boric acid injected system of emergency is provided as second
Cover reactor shut-off system.The reliability of reactor emergency shutdown system in the case of enhancing accident, improves the safety of reactor.
Technical scheme is as follows:
For a kind of dense boric acid injected system of emergency as second set reactor shut-off system, the dense boron case in top provides dense boric acid, when emergency shutdown,
Gas-filled switching tube energization magnet disconnects, and dense boric acid flows into injection endless tube full of the cooling line in reactor, finally by injection pipeline
It is pooled to outlet line, when draining, opens inflator pump for helium and inject pipeline, last drainage switch energization magnet is connected, pipeline
Closing.
It meets an urgent need as described above dense boric acid injected system, wherein be equipped in the dense boric acid container for guaranteeing
Solution temperature is not less than the electrical heating elements of boron crystallization temperature.
It meets an urgent need as described above dense boric acid injected system, wherein the B solution concentration in the dense boric acid container is
7000-9000ppm, the temperature in boric acid container are higher than 9000ppm boric acid solution crystallization temperature.
A kind of dense boric acid injected system of emergency is as second set reactor shut-off system, and under accident conditions, normal condition is to react
Heap trip protection system issues scram signal to emergency shutdown subsystem, and scram signal keeps shutdown breaker coil disconnected
Electricity, control rod power cut-off, control rod fall, but when control rod falls and fails, reactor trip protection system is dense to meeting an urgent need
Boric acid injected system issues signal, and row's pump is filled in starting after dense boric acid injected system of meeting an urgent need receives signal, or in passive means
After failure, injecting concentrated boric acid solution by active means makes reactor emergency shut-down, greatly improves the safety of reactor.
Detailed description of the invention
Fig. 1 is the pipeline arrangement schematic diagram of second set of last moment emergency shut-down.
Fig. 2 is charging pipe line control switch schematic diagram.
Fig. 3 is flowing line control switch schematic diagram.
In figure, 1. dense 2. charging pipe line control switch of boric acid container, 3. flowing line control switches 4. fill drainpipe
Line 5. fills cooling tube 7. in draining 6. heap of endless tube and fills 8. pressure vessel 9. of flowing line and fill 10. energization magnet of draining pump
11. energization magnet.
Specific embodiment
Dense boric acid injected system of meeting an urgent need is relied on except the emergency shutdown means of gravity underthrust after the power-off of original control rod,
Increase dense boric acid injected system of meeting an urgent need as active emergency shutdown means.This kind configuration belongs to active to be combined with passive
Safety measure, the shutdown means that make to meet an urgent need are with redundancy and diversity, to improve the safety of reactor.
The dense boric acid injected system of emergency provided by the present invention receives the letter for the shutdown failure that reactor protection system issues
Number, dense boric acid system of meeting an urgent need includes dense boric acid container, is equipped in dense boric acid container for guaranteeing solution temperature not less than boron
The electrical heating elements of crystallization temperature, dense boric acid container connect water-filling endless tube by water-filling pipeline, and the connection of water-filling endless tube uniformly divides
The Core cooling pipe of cloth is connected on the pipeline of the other end and fills exhaust pump, receives the shutdown failure that reactor protection system issues
Signal.
When meeting an urgent need shutdown, gas-filled switching tube energization magnet is disconnected, and dense boric acid flows into injection endless tube full of anti-by injection pipeline
The cooling line in heap is answered, is finally pooled to outlet line, when draining, inflator pump is opened by helium and injects pipeline, finally drain
It switchs energization magnet to connect, pipeline closing.
The present invention provides the emergency shutdown means when failure occurs to fall for control rod, and are mutually tied using two kinds of means
The method of conjunction, from the feasibility of emergency shut-down realization is generally enhanced, to ensure that the safety of reactor.
Claims (10)
1. a kind of dense boric acid injected system of emergency, including dense boron case (1) provide dense boric acid, meet an urgent need shutdown when, gas-filled switching tube (2) is logical
Electromagnet disconnects, and dense boric acid flows into injection endless tube (5) by injection pipeline (4) and finally converges full of the cooling line (6) in reactor
When collecting outlet line (7) draining, inflator pump (9) are opened by helium and inject pipeline, last drainage switch (3) energization magnet connects
It is logical, pipeline closing.
2. according to claim 1 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the dense boron
It is equipped in sour case and guarantees the non crystallized electric heating equipment of boron.
3. according to claim 2 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the storage
Tank is located at the upper left side of pressure vessel, and horizontal distance is pressure vessel three times diameter length, and radial distance is the two of pressure vessel
Height again.
4. according to claim 3 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the dense boron
B solution is 7000-9000ppm in case.
5. according to claim 3 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the entrance
The diameter of pipeline is 10cm, pipe thickness 9mm.
6. described one kind according to claim 3 is used for second set of dense boric acid last moment emergency shut-down, which is characterized in that institute
The diameter for stating outlet line is 15cm, pipe thickness 9mm.
7. according to claim 3 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the entrance
The annular diameter of endless tube is pipe diameter 10cm, pipe thickness 9mm.
8. according to claim 3 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the pressure
Cooling pipe diameter is 6cm, pipe thickness 5mm in container.
9. according to claim 3 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that the pressure
The quantity of cooling pipe is 12 in container, cyclic annular uniformly arrangement.
10. according to claim 1 a kind of for second set of dense boric acid last moment emergency shut-down, which is characterized in that described to fill
Exhaust pump is connected to inside dense boron case, is located at ullage 10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753379.7A CN109427422A (en) | 2017-08-29 | 2017-08-29 | A kind of dense boric acid injected system of emergency is as second set of reactor shut-off system of presurized water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753379.7A CN109427422A (en) | 2017-08-29 | 2017-08-29 | A kind of dense boric acid injected system of emergency is as second set of reactor shut-off system of presurized water reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109427422A true CN109427422A (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710753379.7A Pending CN109427422A (en) | 2017-08-29 | 2017-08-29 | A kind of dense boric acid injected system of emergency is as second set of reactor shut-off system of presurized water reactor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01196597A (en) * | 1988-02-01 | 1989-08-08 | Mitsubishi Atom Power Ind Inc | Emergency shutdown apparatus of nuclear reactor |
| JPH01272994A (en) * | 1988-04-25 | 1989-10-31 | Hitachi Ltd | Reactor shutdown device |
| CN102881340A (en) * | 2012-09-27 | 2013-01-16 | 中国核电工程有限公司 | Emergency shut-down system and method combining activeness and passiveness |
| CN203895129U (en) * | 2014-04-18 | 2014-10-22 | 中国核电工程有限公司 | Reactor boric acid supplying system with emergency concentrated boric acid injection function |
| CN104616707A (en) * | 2014-12-30 | 2015-05-13 | 中国原子能科学研究院 | Boron injection system for second reactor shutdown system of research reactor |
| CN205354667U (en) * | 2015-12-15 | 2016-06-29 | 中国核动力研究设计院 | Quick safe shutdown system of nuclear power plant |
-
2017
- 2017-08-29 CN CN201710753379.7A patent/CN109427422A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01196597A (en) * | 1988-02-01 | 1989-08-08 | Mitsubishi Atom Power Ind Inc | Emergency shutdown apparatus of nuclear reactor |
| JPH01272994A (en) * | 1988-04-25 | 1989-10-31 | Hitachi Ltd | Reactor shutdown device |
| CN102881340A (en) * | 2012-09-27 | 2013-01-16 | 中国核电工程有限公司 | Emergency shut-down system and method combining activeness and passiveness |
| CN203895129U (en) * | 2014-04-18 | 2014-10-22 | 中国核电工程有限公司 | Reactor boric acid supplying system with emergency concentrated boric acid injection function |
| CN104616707A (en) * | 2014-12-30 | 2015-05-13 | 中国原子能科学研究院 | Boron injection system for second reactor shutdown system of research reactor |
| CN205354667U (en) * | 2015-12-15 | 2016-06-29 | 中国核动力研究设计院 | Quick safe shutdown system of nuclear power plant |
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Application publication date: 20190305 |