CN107887038A - The cold protection against overpressure method and device of nuclear power station - Google Patents
The cold protection against overpressure method and device of nuclear power station Download PDFInfo
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- CN107887038A CN107887038A CN201711128718.9A CN201711128718A CN107887038A CN 107887038 A CN107887038 A CN 107887038A CN 201711128718 A CN201711128718 A CN 201711128718A CN 107887038 A CN107887038 A CN 107887038A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/004—Pressure suppression
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
- G21C17/01—Inspection of the inner surfaces of vessels
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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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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The present invention is applied to technical field of nuclear power, there is provided a kind of cold protection against overpressure method and device of nuclear power station, wherein, cold protection against overpressure method includes：Monitor the working condition of high-pressure safe injection system；If the high-pressure safe injection system is in running status, the Current Temperatures and pressurizer safety valve setting value curve of internal pressure vessel walls are then obtained, and the current setting valve of the pressurizer safety valve is determined according to the Current Temperatures and pressurizer safety valve setting valve curve；The setting valve of the pressurizer safety valve is adjusted according to the current setting valve；Current pressure of the pressure vessel under the Current Temperatures is detected, if the current pressure is more than the setting valve, opens the pressurizer safety valve.The cold protection against overpressure method and device of nuclear power station of the present invention can avoid primary Ioops pressure from continuing to raise so that the pressure that pressure vessel is born prevents pressure vessel from brittle fracture occurs in allowed band.
Description
Technical field
The invention belongs to technical field of nuclear power, it is more particularly related to a kind of cold protection against overpressure method of nuclear power station
And device.
Background technology
The reactor pressure vessel of pressurized-water reactor nuclear power plant is used to carry reactor core and in-pile component, so that the fission of nuclear fuel is anti-
It should be limited in a confined space and carry out, therefore, reactor pressure vessel is the important component of primary Ioops pressure boundary,
It is the important barrier for preventing radioactive substance from escaping.Reactor pressure vessel is typically formed using the forging of low-alloy steel material,
During pressurized-water reactor nuclear power plant is run, reactor pressure vessel will bear the double action of thermal stress and compression, wherein, thermal stress
Refer to pressure vessel wall thickness direction due to the temperature of each several part is different and caused pressure, compression refer to reactor operation
Under high-temperature high-pressure state, pressure vessel bears compression caused by internal pressure.However, due in low temperature, the material of pressure vessel
Expect that ductility is very poor, therefore, when reactor pressure vessel is run under the low temperature condition of high temperature, brittle fracture occurs for pressure vessel
It is very risky, that is to say, that under cryogenic high pressure state, the reactor pressure vessel of pressurized-water reactor nuclear power plant easily occurs cold super
Pressure.
At present, in order to solve the above problems, prior art mainly uses following three kinds of methods：
(1) reliability of overpressure protection is improved by using redundant configuration voltage-stablizer blowdown line.Specifically, this method is
On the basis of the spring loaded safety valve overpressure protection pipeline of nuclear power station conventional configuration, additionally it is configured with multirouting and is pneumatically isolated valve
The blowdown line formed with motor-operated isolation valve, to realize the overpressure protection of the reactor pressure vessel of pressurized-water reactor nuclear power plant.
However, although this method can improve the reliability of overpressure protection, due to multiple configuration blowdown line with
And the equal cost of nuclear grade valve of installation is high, and the blowdown line of the multiple configuration needs to be arranged within nuclear island factory building, its
Cause power plant design and arrangement that major change occurs, need huge manpower and financial resources in the specific implementation；In addition, this method is only
Protection is provided for the superpressure risk under normal operational condition, and can not be to one caused by Main steam line break accident
Loop cooling agent sub-cooled, while the automatic start of high-pressure safe injection system makes the representative accident work such as primary Ioops pressure rise
Cold superpressure risk under condition provides effective protection.
(2) by setting a series of possible superpressure risk of alarm for high voltage information reminding operators.Specifically, this method will
The function of pressurizer safety valve is divided into normal operation protected mode and low-temperature protection pattern, by safety valve under low-temperature protection pattern
Protection definite value is turned down to 3-5MPa, while sets a series of possible superpressure risk of overpressure alarm information reminding operators.
However, this method equally provides protection only for the superpressure risk under normal operational condition, and can not to due to
Primary Ioops cooling agent sub-cooled caused by Main steam line break accident, while the automatic start of high-pressure safe injection system makes
Cold superpressure risk under the Analyses of Typical Accidents such as primary Ioops pressure rise provides effective protection.
(3) the reliable of overpressure protection is improved by carrying out configuration to pressurizer safety valve and residual heat removal system safety valve
Property.Specifically, this method opens setting valve to improve waste heat after residual heat removal system access, by turning down pressurizer safety valve
The reliability of cold overpressure protection under discharge system access state, to be pacified in the safe defective valve of residual heat removal system by voltage-stablizer
Full valve carries out pressure release.
However, although this method can think residual heat removal system safety by turning down the protection definite value of pressurizer safety valve
Valve provides the salvo of redundancy, but it is equally to provide protection only for the superpressure risk under normal operational condition, and
Can not be to the primary Ioops cooling agent sub-cooled caused by Main steam line break accident, while high-pressure safe injection system
Automatic start makes the cold superpressure risk under the Analyses of Typical Accidents such as primary Ioops pressure rise provide effective protection.
Therefore, it is necessary to a kind of new technical scheme is proposed, to solve above-mentioned technical problem.
The content of the invention
The goal of the invention of the present invention is：There is provided a kind of nuclear power station cold protection against overpressure method and device, it is existing to solve
Present in cold protection against overpressure method can not to the primary Ioops cooling agent sub-cooled caused by Main steam line break accident,
The automatic start of high-pressure safe injection system puies forward the cold superpressure risk under the Analyses of Typical Accidents of primary Ioops pressure rise simultaneously
For effective protection.
The first aspect of the embodiment of the present invention provides a kind of cold protection against overpressure method of nuclear power station, and it includes：
Monitor the working condition of high-pressure safe injection system；
If the high-pressure safe injection system is in running status, Current Temperatures and the voltage stabilizing of internal pressure vessel walls are obtained
Device safety valve setting value curve, and determine the voltage stabilizing according to the Current Temperatures and the pressurizer safety valve setting valve curve
The current setting valve of device safety valve；
The setting valve of the pressurizer safety valve is adjusted according to the current setting valve；
Current pressure of the pressure vessel under the Current Temperatures is detected, if the current pressure is more than described adjust
Value, then open the pressurizer safety valve.
The second aspect of the embodiment of the present invention provides a kind of cold overpressure protection device of nuclear power station, the cold protection against overpressure dress
Put including：
Monitoring modular, for monitoring the working condition of high-pressure safe injection system；
Setting valve determining module, if being in running status for the high-pressure safe injection system, obtain pressure vessel
The Current Temperatures and pressurizer safety valve setting valve curve of inwall, and according to the Current Temperatures and pressurizer safety valve setting valve
Curve determines the current setting valve of the pressurizer safety valve；
Setting valve adjusting module, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；
Opening module, for detecting current pressure of the pressure vessel under the Current Temperatures, if the current pressure
Power is more than the setting valve, then opens the pressurizer safety valve.
The third aspect of the embodiment of the present invention provides a kind of cold overpressure protection device of nuclear power station, the cold superpressure of nuclear power station
Protector includes：Memory, processor and it is stored in the calculating that can be run in the memory and on the processor
Machine program, the step of realizing above-mentioned cold protection against overpressure method described in the computing device during computer program.
The fourth aspect of the embodiment of the present invention provides a kind of computer-readable recording medium, the computer-readable storage
Media storage has computer program, and the computer program realizes the step of above-mentioned cold protection against overpressure method when being executed by processor
Suddenly.
Relative to prior art, the beneficial effect of the cold protection against overpressure method and device of nuclear power station of the present invention is：The present invention is logical
Cross when high-pressure safe injection system is in running order, the Current Temperatures and pressurizer safety valve that obtain internal pressure vessel walls are set
The settled value curve, and the current setting valve of pressurizer safety valve is determined according to Current Temperatures and pressurizer safety valve setting valve curve,
And then the setting valve of pressurizer safety valve can be adjusted according to current setting valve, and it is current under Current Temperatures to detect pressure vessel
Pressure, if current pressure is more than setting valve, pressurizer safety valve is opened, to avoid primary Ioops pressure from continuing to raise, and then is made
The pressure born of pressure vessel in allowed band, avoid pressure vessel that brittle fracture occurs.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the implementation process schematic diagram for a kind of cold protection against overpressure method of nuclear power station that the embodiment of the present invention one provides；
Fig. 2 is another implementation process signal for a kind of cold protection against overpressure method of nuclear power station that the embodiment of the present invention two provides
Figure；
Fig. 3 is a kind of setting for the cold protection against overpressure method middle cooling pipe section thermometric instrument of nuclear power station that the embodiment of the present invention two provides
Seated position schematic diagram；
Fig. 4 is a kind of temperature for the cold protection against overpressure method middle cooling pipe section thermometric instrument of nuclear power station that the embodiment of the present invention two provides
Spend signal checking schematic diagram；
Fig. 5 is a kind of mistake for the cold protection against overpressure method middle cooling pipe section temperature change of nuclear power station that the embodiment of the present invention two provides
Journey schematic diagram；
Fig. 6 is the pressurizer safety valve setting valve for a kind of cold protection against overpressure method of nuclear power station that the embodiment of the present invention two provides
The schematic diagram of curve；
Fig. 7 is the pressurizer safety valve setting valve for a kind of cold protection against overpressure method of nuclear power station that the embodiment of the present invention two provides
The schematic diagram of curve；
Fig. 8 is a kind of schematic diagram for the cold overpressure protection device of nuclear power station that the embodiment of the present invention three provides；
Fig. 9 is a kind of schematic diagram for the cold overpressure protection device of nuclear power station that the embodiment of the present invention four provides；
Figure 10 is a kind of schematic diagram for the cold overpressure protection device of nuclear power station that the embodiment of the present invention five provides.
Embodiment
In describing below, in order to illustrate rather than in order to limit, it is proposed that such as tool of particular system structure, technology etc
Body details, thoroughly to understand the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, omit to well-known system, device, electricity
Road and the detailed description of method, in case unnecessary details hinders description of the invention.
It should be appreciated that ought be in this specification and in the appended claims in use, special described by the instruction of term " comprising "
Sign, entirety, step, operation, the presence of element and/or component, but be not precluded from one or more of the other feature, entirety, step,
Operation, element, component and/or its presence or addition for gathering.
It is also understood that the term used in this description of the invention is merely for the sake of the mesh for describing specific embodiment
And be not intended to limit the present invention.As used in description of the invention and appended claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singulative, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in description of the invention and appended claims is
Refer to any combinations of one or more of the associated item listed and be possible to combine, and including these combinations.
As used in this specification and in the appended claims, term " if " can be according to context quilt
Be construed to " when ... " or " once " or " in response to determining " or " in response to detecting ".Similarly, phrase " if it is determined that " or
" if detecting [described condition or event] " can be interpreted to mean according to context " once it is determined that " or " in response to true
It is fixed " or " once detecting [described condition or event] " or " in response to detecting [described condition or event] ".
It should be understood that the size of the sequence number of each step is not meant to the priority of execution sequence in the present embodiment, each process
Execution sequence should determine that the implementation process without tackling the embodiment of the present invention forms any restriction with its function and internal logic.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
It is the implementation process schematic diagram for the cold protection against overpressure method of nuclear power station that the embodiment of the present invention one provides, such as referring to Fig. 1
Shown in figure, the cold protection against overpressure method of the nuclear power station may comprise steps of：
Step S101：Monitor the working condition of high-pressure safe injection system.
Wherein, in embodiments of the present invention, high-pressure safe injection system is occurring such as one time as engineered safeguards features
By automatic start after road cooling agent defluidization or Main steam line break accident, and held by cold leg and/or heat pipe section to pressure
Device injects colder boron water, recovers primary Ioops water loading amount with this, so that it is guaranteed that Core cooling.And due to high-pressure safe injection system
The colder boron water injected of uniting declines ring cavity, and the colder boron water and internal pressure vessel walls through cold leg feed pressure container
Contact, pressure vessel is produced quenching, larger thermal stress is produced in wall thickness direction, is broken so that pressure vessel has fragility
The risk split, that is, cold superpressure risk be present, therefore, when the pressure vessel in primary Ioops does cold protection against overpressure, cold superpressure is prevented
Protection unit needs the working condition of moment monitoring high-pressure safe injection system.
Step S102：If the high-pressure safe injection system is in running status, the current of internal pressure vessel walls is obtained
Temperature and pressurizer safety valve setting valve curve, and it is true according to the Current Temperatures and the pressurizer safety valve setting valve curve
The current setting valve of the fixed pressurizer safety valve.
Wherein, in embodiments of the present invention, due to describing the running status of high-pressure safe injection system in step S101
There is critically important influence to the safety of pressure vessel, therefore, when cold overpressure protection device monitors high-pressure safe injection system
During in running status, cold overpressure protection device needs to obtain the Current Temperatures of pressure vessel and pressurizer safety valve setting value is bent
Line, and the current setting valve of the pressurizer safety valve according to the determination of pressurizer safety valve setting valve curve at such a temperature.
It should be noted that in embodiments of the present invention, pressurizer safety valve setting valve curve refers to that pressure vessel exists
The limiting pressure that can bear at a certain temperature, it can be obtained according to the temperature of internal pressure vessel walls, subsequently will be detailed to this progress
Describe in detail bright, here is omitted.
Step S103：The setting valve of the pressurizer safety valve is adjusted according to the current setting valve.
Wherein, in embodiments of the present invention, when cold overpressure protection device obtains the current setting valve of pressurizer safety valve,
Cold overpressure protection device can adjust the setting valve of pressurizer safety valve according to the current Fitting Values, hold so as to realize according to pressure
The cooling degree of device dynamically adjusts the setting valve of pressurizer safety valve.
When it is implemented, after cold overpressure protection device obtains the current setting valve of pressurizer safety valve, cold superpressure is prevented
The current setting valve is converted into electric signal by protection unit, and the electric signal is sent to pressurizer safety valve, so that voltage stabilizing
Setting valve setting module inside device safety valve is set to the setting valve of pressurizer safety valve, is reset surely so as to realize
The purpose of depressor safety valve setting value.
It should be noted that in embodiments of the present invention, only when high-pressure safe injection system operation, cold protection against overpressure
Device can be just adjusted to the setting valve of pressurizer safety valve, and when high-pressure safe injection system is in stoppage in transit state, it is cold
Overpressure protection device is not adjusted to the setting valve of pressurizer safety valve.
Step S104：Current pressure of the pressure vessel under the Current Temperatures is detected, if the current pressure is big
In the setting valve, then the pressurizer safety valve is opened.
Wherein, in embodiments of the present invention, due to having been explicitly pointed out in step S101 at high-pressure safe injection system
When running status, it can cause pressure vessel produces to be quenched, and the change of pressure vessel internal temperature, it will so that pressure is held
The pressure change that device is born, therefore, after high-pressure safe injection system is opened, cold overpressure protection device should detect pressure appearance
Current pressure of the device under Current Temperatures, and by the pressure compared with the setting valve of pressurizer safety valve, and voltage-stablizer is pacified
The setting valve of full valve is as the criterion for deciding whether opening pressurizer safety valve, when the current pressure of the pressure vessel of primary Ioops
When power exceedes the setting valve, cold overpressure protection device unlatching pressurizer safety valve, and the current pressure of the pressure vessel of primary Ioops
During not less than the setting valve, cold overpressure protection device control pressurizer safety valve is continuously off.
The embodiment of the present invention is by when high-pressure safe injection system is in running order, obtaining working as internal pressure vessel walls
Preceding temperature and pressurizer safety valve setting value curve, and determine voltage stabilizing according to Current Temperatures and pressurizer safety valve setting valve curve
The current setting valve of device safety valve, and then the setting valve of pressurizer safety valve can be adjusted according to current setting valve, and detect pressure
Current pressure of the container under Current Temperatures, if current pressure is more than setting valve, pressurizer safety valve is opened, to avoid one time
Road pressure continues to raise, and then causes the pressure born of pressure vessel in allowed band, avoids pressure vessel that fragility occurs and breaks
Split.
It is the implementation process schematic diagram for the cold protection against overpressure method of nuclear power station that the embodiment of the present invention one provides, such as referring to Fig. 2
Shown in figure, the cold protection against overpressure method of the nuclear power station may comprise steps of：
Step S201：Monitor the working condition of high-pressure safe injection system.
Wherein, in embodiments of the present invention, high-pressure safe injection system is occurring such as one time as engineered safeguards features
By automatic start after road cooling agent defluidization or Main steam line break accident, and held by cold leg and/or heat pipe section to pressure
Device injects colder boron water, recovers primary Ioops water loading amount with this, so that it is guaranteed that Core cooling.And due to high-pressure safe injection system
The colder boron water injected of uniting declines ring cavity, and the colder boron water and internal pressure vessel walls through cold leg feed pressure container
Contact, pressure vessel is produced quenching, larger thermal stress is produced in wall thickness direction, is broken so that pressure vessel has fragility
The risk split, that is, cold superpressure risk be present, therefore, when the pressure vessel in primary Ioops does cold protection against overpressure, cold superpressure is prevented
Protection unit needs the working condition of moment monitoring high-pressure safe injection system.
Specifically, the working condition of monitoring high-pressure safe injection system includes：
Obtain the pipeline flow of the either rank high-pressure safe injection system in multiple row high-pressure safe injection system；
If the pipeline flow of the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system is more than pre-
If threshold value, then it is identified as high-pressure safe injection system and is in running status；
If the pipeline flow of each row high-pressure safe injection system in the multiple row high-pressure safe injection system is not more than
The predetermined threshold value, then detect the syringe pump of the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system
Running status；
If the syringe pump of the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system is currently running,
Then detect the cold leg injection valve state for the high-pressure safe injection system that the syringe pump is currently running；
If the cold leg injection valve is in open mode, it is identified as high-pressure safe injection system and is in operation shape
State.
Wherein, in embodiments of the present invention, because pressurized-water reactor nuclear power plant is typically arranged with the high pressure of two row or the two row above
Safety injection system, and when either rank high-pressure safe injection system operation, it can all make it that pressure vessel produces cold superpressure risk,
Therefore cold overpressure protection device needs to be monitored the state of each row high-pressure safe injection system, if there is a row high-voltage safety
Injecting systems are in running status, then it is believed that high-pressure safe injection system is in running status, it is meant that pressure vessel can
Potential cold superpressure risk, when only each row high-pressure safe injection system is all not in running status, high-voltage safety can be faced
Injecting systems are just stoppage in transit state.
Below in the case of wherein one row, the judgement to the running status of high-pressure safe injection system is described in detail.
Specifically, the cold overpressure protection device of nuclear power station should judge the pipeline flow of the row high-pressure safe injection system first
Whether given predetermined threshold value is exceeded, wherein, the predetermined threshold value is to represent the flow threshold that high-pressure safe injection system is efficiently injected into
Value, it is preferred that the threshold value can be set as 40 cubic metres per hour.
If the pipeline flow of the row high-pressure safe injection system is more than the predetermined threshold value, show high-pressure safe injection system
System is in running status；If the pipeline flow of the row high-pressure safe injection system is less than the predetermined threshold value, or because of instrument sheet
When body failure and other reasons can not be judged according to pipeline flow, cold overpressure protection device passes through syringe pump and cold leg injection valve
Whether the condition adjudgement high-pressure safe injection system of door is in running status.
Specifically, the syringe pump that the cold overpressure protection device of nuclear power station further detects the row high-pressure safe injection system is
It is no to run, if syringe pump is being run, show that high-pressure safe injection system is in running status, if syringe pump is not being transported
OK, then cold overpressure protection device detect the row high-pressure safe injection system cold leg injection valve whether open, if cold leg
Inject valve to open, then show that high-pressure safe injection system is in running status, if each row high-pressure safe injection system is cold
Pipeline section injection valve is not turned on, then shows that high-pressure safe injection system is in stoppage in transit state.
Step S202：If the high-pressure safe injection system is in running status, the current of internal pressure vessel walls is obtained
Temperature and pressurizer safety valve setting valve curve, and it is true according to the Current Temperatures and the pressurizer safety valve setting valve curve
The current setting valve of the fixed pressurizer safety valve.
Wherein, in embodiments of the present invention, due to describing the running status of high-pressure safe injection system in step S201
There is critically important influence to the safety of pressure vessel, therefore, when cold overpressure protection device monitors high-pressure safe injection system
During in running status, cold overpressure protection device needs to obtain the Current Temperatures of pressure vessel and pressurizer safety valve setting valve is bent
Line, and the current setting valve of the pressurizer safety valve according to the determination of pressurizer safety valve setting valve curve at such a temperature.
Further, the temperature for obtaining internal pressure vessel walls includes：
The temperature signal of multiple cold leg thermometric instruments of each presurized water reactor loop in multiple presurized water reactor loops is obtained, its
In, the cold leg thermometric instrument is arranged on the injection pipeline interface of the high-pressure safe injection system and the pressure vessel
Between inlet nozzle, and close to the position of the inlet nozzle；
Validity check is carried out to the temperature signal, and the temperature of each presurized water reactor loop is obtained according to check results
Degree；
The temperature of the internal pressure vessel walls is determined according to the temperature of each presurized water reactor loop.
Wherein, in embodiments of the present invention, because the temperature of internal pressure vessel walls can not be monitored directly, therefore, Ke Yixuan
The temperature of cold leg temperature representative Pressure vessel downcomer is taken, to the state of cooling of monitoring pressure container, cold leg temperature
Cold leg thermometric instrument can be used to obtain, and due to consideration that in cold leg cooling agent thermal stratification, temperature is higher
Cooling agent is along cold leg upper flow, and the relatively low cooling agent of temperature is along cold leg lower flow, therefore, cold leg thermometric instrument
Installation site should be close proximity to pressure container inlet ozzle, and it is cold to obtain lower floor in cold leg to be located at cold leg bottom position
But the temperature of agent.
In addition, in order to accurately obtain the temperature of internal pressure vessel walls, it will usually each pressure in multiple presurized water reactor loops
Multiple cold leg thermometric instruments are set in water-water reactor loop, total score is carried out by the temperature signal detected to multiple thermometric instruments
Analysis, obtain the exact value of the temperature of internal pressure vessel walls.
Further, due to the temperature signal measured by thermometric instrument be in the form of standard signal (such as 1~5V DC
The current signal of voltage signal or 4~20mA) send out, and if the failures such as broken string, excessively stream occur for thermometric instrument, submitting
Temperature signal is by no to scale (such as disconnection fault directly results in signal and is changed into 0V or 0mA, no to scale), therefore, when cold superpressure
After protector obtains the temperature signal that multiple cold leg thermometric instruments are detected in each presurized water reactor loop, cold protection against overpressure
Device needs to carry out validity check to the plurality of temperature signal, and so-called validity check is then to judge cold leg thermometric instrument institute
The validity of the temperature signal of acquisition, the temperature signal within range ability are effective, and the temperature signals of no to scale
It is invalid to be then identified as.
Specifically, working as primary Ioops includes three presurized water reactor loops, and three cold pipes are provided with each presurized water reactor loop
During Duan Yibiao, cold overpressure protection device judges whether the temperature signal of three cold leg instrument in each presurized water reactor loop has
Effect, if three temperature signals in each presurized water reactor loop are effective, the median in three temperature signals is taken to represent
The cold leg temperature of the presurized water reactor loop；If only two temperature signals are effective in each presurized water reactor loop, both are taken
In smaller value represent the cold leg temperature of the presurized water reactor loop；If there is an only temperature signal in each presurized water reactor loop
Effect, then take the effective temperature signal to represent the cold leg temperature of the presurized water reactor loop；If three in each presurized water reactor loop
Individual temperature signal is invalid, then takes the virtual value at a moment to represent the cold leg temperature of the presurized water reactor loop.
When the cold overpressure protection device of nuclear power station obtains the effective temperature signal of each presurized water reactor loop, that is, get three
After the cold leg temperature of presurized water reactor loop, cold overpressure protection device can take minimum cold of temperature signal in three presurized water reactor loops
The state of cooling of pipeline section temperature representative pressure vessel, the state of cooling are the temperature of internal pressure vessel walls.
It should be noted that in embodiments of the present invention, the validity check process of above-mentioned cold leg temperature is merely illustrative
Illustrate, not to limit to the present invention, for example, cold overpressure protection device has in the temperature signal to cold leg thermometric instrument
During the verification of effect property, the cold leg temperature as loop such as maximum, minimum value of effective cold leg temperature signal can also be chosen
Degree (chooses maximum as least conservative consideration, selection minimum value is most conservative consideration)；Similarly, when cold protection against overpressure fills
After putting the cold leg temperature for verifying out each presurized water reactor loop, cold overpressure protection device can also regard requirement of engineering and choose three pressures
The median of cold leg temperature in water-water reactor loop or the state of cooling of maximum representative pressure container (choose median or maximum
Value is not conservative consideration partially compared to minimum value is chosen).
Further, the acquisition pressurizer safety valve setting valve curve includes：
Calculate the cold leg temperature from initial maximum temperature multiple different temperature points are reduced to pre-set velocity when, it is more
Multiple first limiting pressures that the pressure vessel can bear under the individual different temperature points, and according to multiple first poles
Limits pressure and the corresponding relation of multiple different temperature points obtain first straight line；
When calculating the cold leg temperature and being in any temperature definite value, the pressure vessel can be held under the temperature definite value
The second limiting pressure received, and second straight line is obtained according to the corresponding relation of the temperature definite value and second limiting pressure；
Obtain different cold leg temperature in the first straight line and the second straight line on corresponding otherwise limit pressure
Power, and take in both that less limiting pressure is as goal pressure corresponding to different cold leg temperature, according to the target pressure
Power and the cold leg temperature corresponding with the goal pressure obtain the pressurizer safety valve setting valve curve.
Wherein, in embodiments of the present invention, pressurizer safety valve setting valve curve refers to pressure vessel in a certain temperature
Under the limiting pressure that can bear, it can be obtained according to the temperature of internal pressure vessel walls.
Specifically, cold leg temperature is reduced to what multiple different temperature points referred to from initial maximum temperature with pre-set velocity
It is：Cold leg temperature from initial maximum temperature with infinity the near different temperature points of rate of temperature fall, i.e., cold leg temperature from
Initial highest temperature is directly down to different temperature points, wherein, during initial maximum temperature is the operation of unit normal power
The temperature of cold leg.
The cold superpressure when cold leg temperature a certain temperature spot near with the cooling rate of infinity from initial maximum temperature
Protector should calculate the limiting pressure that pressure vessel can bear at this temperature, and be marked as the first limiting pressure,
The limit pressure refers to that then pressure vessel has brittle fracture risk more than the pressure.Wherein, cold overpressure protection device, which calculates, is somebody's turn to do
The method that the limiting pressure that temperatures force container can bear mainly uses is classical linear elastic fracture mechanics method, certainly
It will be appreciated by persons skilled in the art that cold overpressure protection device is calculating the limit that pressure vessel can bear at this temperature
Also other applicable methods can be used during pressure, here is omitted；In addition, pressure vessel brittle fracture interpretational criteria refers to
Current technical specification or standard (such as ASME).
Further, the process schematic of the cold leg temperature change according to Fig. 5 is illustrated into the present invention below
Concrete principle mistake of the cold protection against overpressure method of nuclear power station that embodiment is provided when obtaining pressurizer safety valve setting valve curve
Journey.
As shown in figure 5, in figure 291.4 DEG C be the operation of unit normal power during cold leg temperature, 120 DEG C in figure, 110
DEG C and 100 DEG C of curves represent cold leg temperature respectively and be cooled to 120 DEG C, 110 DEG C and 100 DEG C from 291.4 DEG C with infinitely great speed,
Now cold overpressure protection device needs to calculate the limiting pressure that pressure vessel can bear at 120 DEG C, 110 DEG C and 100 DEG C, with
Obtain a series of first limiting pressure points, and by the first limiting pressure point with and the corresponding temperature foh of the limiting pressure point into
Straight line, first straight line A (not shown in figure, refer to Fig. 6) is obtained with this.It should be noted that 120 DEG C here, 110 DEG C and
100 DEG C of merely illustrative properties, series of temperature point can be chosen with any temperature interval and be calculated.
Further, it is assumed that cold leg temperature is in certain certain value, then cold overpressure protection device is calculated and corresponded at this temperature
Limiting pressure, show that pressure vessel has brittle fracture risk more than the limiting pressure, cold overpressure protection device can be chosen
Series of temperature point, such as 200 DEG C, 210 DEG C, 220 DEG C ... 300 DEG C etc., and calculate the second limit pressure under each temperature spot
Power, to obtain a series of second limiting pressure points, and by the second limiting pressure point with and the corresponding temperature of the limiting pressure point
It is fitted in alignment, second straight line B (not shown in figure, refer to Fig. 6) is obtained with this.
Different cold leg temperature can be obtained first for no cold leg temperature, the cold anti-locking apparatus of superpressure afterwards
On straight line A and the upper corresponding otherwise limit pressure of second straight line B, and less limiting pressure is taken in both as different cold pipes
Goal pressure corresponding to Duan Wendu, voltage-stablizer safety is obtained according to goal pressure and the cold leg temperature corresponding with goal pressure
Valve setting valve curve, the pressurizer safety valve setting valve curve then (refer to by what first straight line A and second straight line B were formed
Fig. 6).
Further, as shown in fig. 6, by 17.7MPa by reactor-loop pressure vessel allow apply maximum
Pressure (generally 1.15 times of normal operation pressure), and the minimum temperature corresponding to 17.7MPa is 113 DEG C, therefore, should
17.7MPa pressure, minimum temperature corresponding with 17.7MPa and pressurizer safety valve setting valve curve are by the safety of pressure vessel
State demarcation is region I, region II and tri- regions of region III, if a certain moment set state is located at straight line A and straight line
The left side for the broken line that B is formed, then mean that pressure vessel has serious cold superpressure risk (region I)；If a certain moment machine
Group state is located in the region of straight line A and straight line B and 113 DEG C of formation of vertical line (region II), then means that pressure vessel is present
Potential cold superpressure risk；If a certain moment set state is located at the right side (region III) of 113 DEG C of vertical line, mean to press
Force container is unlikely to have cold superpressure risk.
Further, it is described to determine that the voltage-stablizer is pacified according to the Current Temperatures and pressurizer safety valve setting valve curve
The current setting valve of full valve includes：
Sliding-model control is carried out to the pressurizer safety valve setting valve curve；
The voltage stabilizing is determined according in pressurizer safety valve setting valve curve of the Current Temperatures after sliding-model control
The current setting valve of device safety valve.
Wherein, in embodiments of the present invention, it is frequent in order to avoid primary Ioops cooling period pressurizer safety valve setting valve
Adjustment, cold overpressure protection device are determining the current whole of pressurizer safety valve according to Current Temperatures and pressurizer safety valve setting valve
During definite value, it is necessary to first by the pressurizer safety valve setting valve curve discretization being made up of straight line A and straight line B shown in Fig. 6,
Pressurizer safety valve setting valve curve is formed with a series of broken line forms, as shown in Figure 7.
Specifically, as shown in fig. 7, the voltage-stablizer that dotted portion is represented to be formed straight line A and straight line B after discrete is pacified
Full valve setting valve curve, on the pressurizer safety valve setting valve curve, the coordinates of a points is (103 DEG C, 14.5MPa), b points
Coordinate is (93 DEG C, 11.5MPa), the coordinate of c points is (88 DEG C, 7.5MPa), the coordinate of d points is (85 DEG C, 3.0MPa), that is,
Say, when cold leg temperature is more than or equal to 113 DEG C, the setting valve of corresponding pressurizer safety valve is 17.1MPa；When working as cold leg
Temperature be more than or equal to 103 DEG C, and less than 113 DEG C when, the setting valve of corresponding pressurizer safety valve is 14.5MPa；Work as cold leg
Temperature be more than or equal to 93 DEG C, and less than 103 DEG C when, the setting valve of corresponding pressurizer safety valve is 11.5MPa；When cold leg temperature
When spending and be more than or equal to 88 DEG C, and being less than 93 DEG C, the setting valve of corresponding pressurizer safety valve is 7.5MPa；When cold leg temperature is small
When 88 DEG C, the setting valve of corresponding pressurizer safety valve is 3.0MPa, is specifically shown in Table one.Table one is adjusted for pressurizer safety valve
It is worth the mapping table in the range of each break between cold leg temperature and pressurizer safety valve setting valve, cold protection against overpressure on curve
Device can be right according to corresponding pressurizer safety valve setting valve under the table search relevant temperature, such as 110 DEG C of cold leg temperature
The pressurizer safety valve setting valve answered is 14.5MPa.
| Cold leg temperature (T) | Pressurizer safety valve setting valve |
| T≥113℃ | 17.1MPa |
| 103℃≤T<113℃ | 14.5MPa |
| 93℃≤T<103℃ | 11.5MPa |
| 88℃≤T<93℃ | 7.5MPa |
| T<88℃ | 3.0MPa |
Table one
Step S203：The setting valve of the pressurizer safety valve is adjusted according to the current setting valve.
Wherein, in embodiments of the present invention, when cold overpressure protection device obtains the current setting valve of pressurizer safety valve,
Cold overpressure protection device can adjust the setting valve of pressurizer safety valve according to the current Fitting Values, hold so as to realize according to pressure
The cooling degree of device dynamically adjusts the setting valve of pressurizer safety valve.
When it is implemented, after cold overpressure protection device obtains the current setting valve of pressurizer safety valve, cold superpressure is prevented
The current setting valve is converted into electric signal by protection unit, and the electric signal is sent to pressurizer safety valve, so that voltage stabilizing
Setting valve setting module inside device safety valve is set to the setting valve of pressurizer safety valve, is reset surely so as to realize
The purpose of depressor safety valve setting value.
It should be noted that in embodiments of the present invention, only when high-pressure safe injection system operation, cold protection against overpressure
Device can be just adjusted to the setting valve of pressurizer safety valve, and when high-pressure safe injection system is in stoppage in transit state, it is cold
Overpressure protection device is not adjusted to the setting valve of pressurizer safety valve.
Step S204：Current pressure of the pressure vessel under the Current Temperatures is detected, if the current pressure is big
In the setting valve, then the pressurizer safety valve is opened.
Wherein, in embodiments of the present invention, due to having been explicitly pointed out in step S201 at high-pressure safe injection system
When running status, it can cause pressure vessel produces to be quenched, and the change of pressure vessel internal temperature, it will so that pressure is held
The pressure change that device is born, therefore, after high-pressure safe injection system is opened, cold overpressure protection device should detect pressure appearance
Current pressure of the device under Current Temperatures, and by the pressure compared with the setting valve of pressurizer safety valve, and voltage-stablizer is pacified
The setting valve of full valve is as the criterion for deciding whether opening pressurizer safety valve, when the current pressure of the pressure vessel of primary Ioops
When power exceedes the setting valve, cold overpressure protection device unlatching pressurizer safety valve, and the current pressure of the pressure vessel of primary Ioops
During not less than the setting valve, cold overpressure protection device control pressurizer safety valve is continuously off.
Step S205：According to the cold leg temperature, limiting pressure corresponding with the cold leg temperature and described steady
Depressor safety valve setting value curve, determine the artesian condition of the pressure vessel.
Wherein, in embodiments of the present invention, from the description in step S202, pressurizer safety valve setting valve curve can
The safe condition of pressure vessel is divided into region I, region II and tri- regions of region III, different Regional Representative
The different safe conditions of pressure vessel, therefore, when cold overpressure protection device determines current cold leg temperature and the cold leg
After limiting pressure corresponding to temperature, cold overpressure protection device can be according to current cold leg temperature and the cold leg temperature pair
The limiting pressure and pressurizer safety valve setting valve curve answered determine the artesian condition of pressure vessel, and can be according to different peaces
The pressure-bearing device of pressure vessel is expressed as not degraded (region III), degrades (region II) and deteriorates (region I) by total state.
Step S206：Corresponding prompt message is exported according to the artesian condition.
Wherein, in embodiments of the present invention, when the cold overpressure protection device of nuclear power station determines the artesian condition of pressure vessel
Afterwards, the cold overpressure protection device of nuclear power station can send corresponding prompt message according to different artesian conditions, the prompt message bag
Include but be not limited to sound, word, picture, video, indicator lamp etc., for example, cold overpressure protection device can holding in pressure vessel
When pressure condition is not degraded, control green indicating lamp is bright, when the artesian condition of pressure vessel is degrades, controls orange indicating light
Bright, when the artesian condition of pressure vessel is deteriorates, control red led is bright.
The cold overpressure protection method of nuclear power station provided in an embodiment of the present invention causes in generation injection Main steam line break etc.
During the accident of the rapid sub-cooled of reactor, the degree according to reactor sub-cooled is dynamically turned down pressurizer safety valve and adjusted
Value, when primary Ioops pressure exceedes safety valve setting value, automatically turn on pressurizer safety valve and avoid primary Ioops pressure from continuing to raise,
Make the stress that pressure vessel is born within allowed band, can effectively after elimination accident pressure vessel it is crisp caused by cold superpressure
Property risk of breakage.Meanwhile means of the present invention to pressure vessel integrity state monitoring after accidents happened, operator can be according to monitoring
To pressure vessel integrity state take corresponding intervening measure.
It is the schematic diagram for the cold overpressure protection device 8 of nuclear power station that the embodiment of the present invention three provides referring to Fig. 8, for the ease of
Illustrate, illustrate only the part related to the embodiment of the present invention.
The cold overpressure protection device 8 includes：
Monitoring modular 81, for monitoring the working condition of high-pressure safe injection system；
Setting valve determining module 82, if being in running status for the high-pressure safe injection system, obtain pressure and hold
The Current Temperatures and pressurizer safety valve setting valve curve of device inwall, and according to the Current Temperatures and the pressurizer safety valve
Setting valve curve determines the current setting valve of the pressurizer safety valve；
Setting valve adjusting module 83, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；
Opening module 84, for detecting current pressure of the pressure vessel under the Current Temperatures, if described current
Pressure is more than the setting valve, then opens the pressurizer safety valve.
The cold overpressure protection device 8 of nuclear power station provided in an embodiment of the present invention in high-pressure safe injection system by being in work
During state, the Current Temperatures and pressurizer safety valve setting value curve of internal pressure vessel walls are obtained, and according to Current Temperatures and surely
Depressor safety valve setting value curve determines the current setting valve of pressurizer safety valve, and then can adjust voltage stabilizing according to current setting valve
The setting valve of device safety valve, and current pressure of the pressure vessel under Current Temperatures is detected, if current pressure is more than setting valve,
Pressurizer safety valve is opened, to avoid primary Ioops pressure from continuing to raise, and then causes the pressure that pressure vessel is born allowing model
In enclosing, avoid pressure vessel that brittle fracture occurs.
It is the schematic diagram for the cold overpressure protection device 9 of nuclear power station that the embodiment of the present invention four provides referring to Fig. 9, for the ease of
Illustrate, illustrate only the part related to the embodiment of the present invention.
The cold overpressure protection device 9 of nuclear power station includes：
Monitoring modular 91, for monitoring the working condition of high-pressure safe injection system；
Setting valve determining module 92, if being in running status for the high-pressure safe injection system, obtain pressure and hold
The Current Temperatures and pressurizer safety valve setting valve curve of device inwall, and according to the Current Temperatures and the pressurizer safety valve
Setting valve curve determines the current setting valve of the pressurizer safety valve；
Setting valve adjusting module 93, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；
Opening module 94, for detecting current pressure of the pressure vessel under the Current Temperatures, if described current
Pressure is more than the setting valve, then opens the pressurizer safety valve.
State determining module 95, for according to the cold leg temperature, limiting pressure corresponding with the cold leg temperature
And the pressurizer safety valve setting valve curve, determine the artesian condition of the pressure vessel；
Reminding module 96, for exporting corresponding prompt message according to the artesian condition.
Further, setting valve determining module 92 includes：
Temperature acquiring unit, for obtaining multiple cold leg temperature of each presurized water reactor loop in multiple presurized water reactor loops
The temperature signal of instrument, wherein, the injection pipeline that the cold leg thermometric instrument is arranged on the high-pressure safe injection system connects
Between mouth and the inlet nozzle of the pressure vessel, and close to the position of the inlet nozzle；
Verification unit, for carrying out validity check to the temperature signal, and according to check results acquisition is each
The temperature of presurized water reactor loop；
Temperature order member, for determining the temperature of the internal pressure vessel walls according to the temperature of each presurized water reactor loop
Degree.
Further, setting valve determining module 92 also includes：
Curve acquisition unit, for obtaining pressurizer safety valve setting valve curve；
The curve acquisition unit includes：
First straight line obtains subelement, is dropped for calculating the cold leg temperature from initial maximum temperature with pre-set velocity
As little as multiple different temperature points when, the pressure vessel can bear under multiple different temperature points multiple first limit pressures
Power, and first straight line is obtained according to the corresponding relation of multiple first limiting pressures and multiple different temperature points；
The sub- acquiring unit of second straight line, when being in any temperature definite value for calculating the cold leg temperature, the temperature
The second limiting pressure that the pressure vessel can bear under definite value, and according to the temperature definite value and second limiting pressure
Corresponding relation obtain second straight line；
Curve acquisition subelement, for obtaining different cold leg temperature in the first straight line and the second straight line
Otherwise limit pressure corresponding to upper, and less limiting pressure is taken in both as target pressure corresponding to different cold leg temperature
Power, the pressurizer safety valve is obtained according to the goal pressure and the cold leg temperature corresponding with the goal pressure and adjusted
It is worth curve.
Further, setting valve determining module 92 also includes：
Processing unit, for carrying out sliding-model control to the pressurizer safety valve setting valve curve；
Setting valve determining unit, for the pressurizer safety valve setting valve according to the Current Temperatures after sliding-model control
The current setting valve of the pressurizer safety valve is determined in curve.
Further, monitoring modular 91 includes：
Pipeline flow acquiring unit, for obtaining the either rank high-pressure safe injection system in multiple row high-pressure safe injection system
The pipeline flow of system；
First recognition unit, if for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system
Pipeline flow be more than predetermined threshold value, then be identified as high-pressure safe injection system and be in running status；
First detection unit, if for each row high-pressure safe injection system in the multiple row high-pressure safe injection system
Pipeline flow be not more than the predetermined threshold value, then detect the either rank high-voltage safety in the multiple row high-pressure safe injection system
The running status of the syringe pump of injecting systems；
Second detection unit, if for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system
Syringe pump be currently running, then detect the cold leg injection valve gate-shaped for the high-pressure safe injection system that the syringe pump is currently running
State；
Second recognition unit, if being in open mode for cold leg injection valve, it is identified as high-voltage safety note
Penetrate system and be in running status.
The cold overpressure protection apparatus 9 of nuclear power station provided in an embodiment of the present invention causes in generation injection Main steam line break etc.
During the accident of the rapid sub-cooled of reactor, the degree according to reactor sub-cooled is dynamically turned down pressurizer safety valve and adjusted
Value, when primary Ioops pressure exceedes safety valve setting value, automatically turn on pressurizer safety valve and avoid primary Ioops pressure from continuing to raise,
Make the stress that pressure vessel is born within allowed band, can effectively after elimination accident pressure vessel it is crisp caused by cold superpressure
Property risk of breakage.Meanwhile means of the present invention to pressure vessel integrity state monitoring after accidents happened, operator can be according to monitoring
To pressure vessel integrity state take corresponding intervening measure.
Figure 10 is the schematic diagram for the cold overpressure protection device 10 of nuclear power station that the embodiment of the present invention five provides.As shown in Figure 10,
The cold overpressure protection device 10 of nuclear power station of the embodiment includes：Processor 100, memory 101 and it is stored in the memory
In 101 and the computer program 102 that can be run on the processor 100, such as cold protection against overpressure program.The processor
The step in above-mentioned each cold protection against overpressure embodiment of the method, such as Fig. 1 institutes are realized during the 100 execution computer program 102
Step 201 shown in the step 101 shown to 104 and Fig. 2 is to step 206.Or the processor 100 performs the calculating
The function of each module/unit in above-mentioned each device embodiment, such as the work(of module 81 to 84 shown in Fig. 8 are realized during machine program 102
Can and Fig. 9 shown in module 91 to 96 function.
Exemplary, the computer program 102 can be divided into one or more module/units, it is one or
Multiple module/the units of person are stored in the memory 101, and are performed by the processor 100, to complete the present invention.Institute
It can be the series of computation machine programmed instruction section that can complete specific function to state one or more module/units, the instruction segment
For describing implementation procedure of the computer program 102 in the cold overpressure protection device 10.For example, the computer journey
Sequence 102 can be divided into monitoring modular, setting valve determining module, setting valve adjusting module, opening module or be divided into prison
Survey module, setting valve determining module, setting valve adjusting module, opening module, state determining module, reminding module (virtual bench
In module), each module concrete function is as follows：
Monitoring modular 81, for monitoring the working condition of high-pressure safe injection system；
Setting valve determining module 82, if being in running status for the high-pressure safe injection system, obtain pressure and hold
The Current Temperatures and pressurizer safety valve setting valve curve of device inwall, and according to the Current Temperatures and the pressurizer safety valve
Setting valve curve determines the current setting valve of the pressurizer safety valve；
Setting valve adjusting module 83, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；
Opening module 84, for detecting current pressure of the pressure vessel under the Current Temperatures, if described current
Pressure is more than the setting valve, then opens the pressurizer safety valve.Or
Monitoring modular 91, for monitoring the working condition of high-pressure safe injection system；
Setting valve determining module 92, if being in running status for the high-pressure safe injection system, obtain pressure and hold
The Current Temperatures and pressurizer safety valve setting valve curve of device inwall, and according to the Current Temperatures and the pressurizer safety valve
Setting valve curve determines the current setting valve of the pressurizer safety valve；
Setting valve adjusting module 93, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；
Opening module 94, for detecting current pressure of the pressure vessel under the Current Temperatures, if described current
Pressure is more than the setting valve, then opens the pressurizer safety valve.
State determining module 95, for according to the cold leg temperature, limiting pressure corresponding with the cold leg temperature
And the pressurizer safety valve setting valve curve, determine the artesian condition of the pressure vessel；
Reminding module 96, for exporting corresponding prompt message according to the artesian condition.
Further, setting valve determining module 92 includes：
Temperature acquiring unit, for obtaining multiple cold leg temperature of each presurized water reactor loop in multiple presurized water reactor loops
The temperature signal of instrument, wherein, the injection pipeline that the cold leg thermometric instrument is arranged on the high-pressure safe injection system connects
Between mouth and the inlet nozzle of the pressure vessel, and close to the position of the inlet nozzle；
Verification unit, for carrying out validity check to the temperature signal, and according to check results acquisition is each
The temperature of presurized water reactor loop；
Temperature order member, for determining the temperature of the internal pressure vessel walls according to the temperature of each presurized water reactor loop
Degree.
Further, setting valve determining module 92 also includes：
Curve acquisition unit, for obtaining pressurizer safety valve setting valve curve；
The curve acquisition unit includes：
First straight line obtains subelement, is dropped for calculating the cold leg temperature from initial maximum temperature with pre-set velocity
As little as multiple different temperature points when, the pressure vessel can bear under multiple different temperature points multiple first limit pressures
Power, and first straight line is obtained according to the corresponding relation of multiple first limiting pressures and multiple different temperature points；
The sub- acquiring unit of second straight line, when being in any temperature definite value for calculating the cold leg temperature, the temperature
The second limiting pressure that the pressure vessel can bear under definite value, and according to the temperature definite value and second limiting pressure
Corresponding relation obtain second straight line；
Curve acquisition subelement, for obtaining different cold leg temperature in the first straight line and the second straight line
Otherwise limit pressure corresponding to upper, and less limiting pressure is taken in both as target pressure corresponding to different cold leg temperature
Power, the pressurizer safety valve is obtained according to the goal pressure and the cold leg temperature corresponding with the goal pressure and adjusted
It is worth curve.
Further, setting valve determining module 92 also includes：
Processing unit, for carrying out sliding-model control to the pressurizer safety valve setting valve curve；
Setting valve determining unit, for the pressurizer safety valve setting valve according to the Current Temperatures after sliding-model control
The current setting valve of the pressurizer safety valve is determined in curve.
Further, monitoring modular 91 includes：
Pipeline flow acquiring unit, for obtaining the either rank high-pressure safe injection system in multiple row high-pressure safe injection system
The pipeline flow of system；
First recognition unit, if for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system
Pipeline flow be more than predetermined threshold value, then be identified as high-pressure safe injection system and be in running status；
First detection unit, if for each row high-pressure safe injection system in the multiple row high-pressure safe injection system
Pipeline flow be not more than the predetermined threshold value, then detect the either rank high-voltage safety in the multiple row high-pressure safe injection system
The running status of the syringe pump of injecting systems；
Second detection unit, if for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system
Syringe pump be currently running, then detect the cold leg injection valve gate-shaped for the high-pressure safe injection system that the syringe pump is currently running
State；
Second recognition unit, if being in open mode for cold leg injection valve, it is identified as high-voltage safety note
Penetrate system and be in running status.
The cold overpressure protection device 10 of nuclear power station can be desktop PC, notebook, palm PC and high in the clouds clothes
The computing devices such as business device.The cold overpressure protection device 10 of nuclear power station may include, but be not limited only to, processor 100, memory
101.It will be understood by those skilled in the art that Figure 10 is only the example of cold overpressure protection device 10, do not form to cold superpressure
The restriction of protector 10, it can include than illustrating more or less parts, either combine some parts or different portions
Part, such as the cold overpressure protection device 10 can also include input-output equipment, network access equipment, bus etc..
Alleged processor 100 can be CPU (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other PLDs, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng.
The memory 101 can be the internal storage unit of the cold overpressure protection device 10, such as cold protection against overpressure
The hard disk or internal memory of device 10.The memory 101 can also be the External memory equipment of the cold overpressure protection device 10, example
Such as the plug-in type hard disk being equipped with the cold overpressure protection device 10, intelligent memory card (Smart Media Card, SMC), peace
Digital (Secure Digital, SD) blocks, flash card (Flash Card) etc..Further, the memory 101 can be with
Both the internal storage unit of the cold overpressure protection device 10 had been included or including External memory equipment.The memory 101 is used for
Store the computer program and other programs and data needed for the cold overpressure protection device 10.The memory 101
It can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
To be that unit is individually physically present, can also two or more units it is integrated in a unit, it is above-mentioned integrated
Unit can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are not limited to the protection domain of the application also only to facilitate mutually distinguish.Said system
The specific work process of middle unit, module, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and is not described in detail or remembers in some embodiment
The part of load, it may refer to the associated description of other embodiments.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Member and algorithm steps, it can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, application-specific and design constraint depending on technical scheme.Professional and technical personnel
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, can be with
Realize by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of division of logic function, there can be other dividing mode when actually realizing, such as
Multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be by some interfaces, device
Or INDIRECT COUPLING or the communication connection of unit, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated module/unit realized in the form of SFU software functional unit and as independent production marketing or
In use, it can be stored in a computer read/write memory medium.Based on such understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, by computer program the hardware of correlation can also be instructed to complete, described meter
Calculation machine program can be stored in a computer-readable recording medium, and the computer program can be achieved when being executed by processor
The step of stating each embodiment of the method..Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or some intermediate forms etc..Computer-readable Jie
Matter can include：Can carry any entity or device of the computer program code, recording medium, USB flash disk, mobile hard disk,
Magnetic disc, CD, computer storage, read-only storage (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It is it should be noted that described
The content that computer-readable medium includes can carry out appropriate increasing according to legislation in jurisdiction and the requirement of patent practice
Subtract, such as in some jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and
Telecommunication signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied the present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed
Or replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme, all should
Within protection scope of the present invention.
Claims (13)
- A kind of 1. cold protection against overpressure method of nuclear power station, it is characterised in that including：Monitor the working condition of high-pressure safe injection system；If the high-pressure safe injection system is in running status, the Current Temperatures and voltage-stablizer peace of internal pressure vessel walls are obtained Full valve setting valve curve, and determine that the voltage-stablizer is pacified according to the Current Temperatures and the pressurizer safety valve setting valve curve The current setting valve of full valve；The setting valve of the pressurizer safety valve is adjusted according to the current setting valve；Current pressure of the pressure vessel under the Current Temperatures is detected, if the current pressure is more than the setting valve, Then open the pressurizer safety valve.
- 2. the cold protection against overpressure method of nuclear power station according to claim 1, it is characterised in that the acquisition internal pressure vessel walls Temperature include：The temperature signal of multiple cold leg thermometric instruments of each presurized water reactor loop in multiple presurized water reactor loops is obtained, wherein, The cold leg thermometric instrument is arranged on the injection pipeline interface of the high-pressure safe injection system and entering for the pressure vessel Between mouth ozzle, and close to the position of the inlet nozzle；Validity check is carried out to the temperature signal, and the temperature of each presurized water reactor loop is obtained according to check results；The temperature of the internal pressure vessel walls is determined according to the temperature of each presurized water reactor loop.
- 3. the cold protection against overpressure method of nuclear power station according to claim 2, it is characterised in that the acquisition pressurizer safety valve Setting valve curve includes：Calculate the cold leg temperature from initial maximum temperature multiple different temperature points are reduced to pre-set velocity when, Duo Gesuo Multiple first limiting pressures that the pressure vessel under different temperature points can bear are stated, and according to multiple first limit pressures The corresponding relation of power and multiple different temperature points obtains first straight line；When calculating the cold leg temperature and being in any temperature definite value, the pressure vessel can bear under the temperature definite value Second limiting pressure, and second straight line is obtained according to the corresponding relation of the temperature definite value and second limiting pressure；Obtain different cold leg temperature in the first straight line and the second straight line on corresponding otherwise limit pressure, and Less limiting pressure is taken in both as goal pressure corresponding to different cold leg temperature, according to the goal pressure and with The corresponding cold leg temperature of the goal pressure obtains the pressurizer safety valve setting valve curve.
- 4. the cold protection against overpressure method of nuclear power station according to claim 3, it is characterised in that described according to the Current Temperatures The current setting valve for determining the pressurizer safety valve with pressurizer safety valve setting valve curve includes：Sliding-model control is carried out to the pressurizer safety valve setting valve curve；According to determining voltage-stablizer peace in pressurizer safety valve setting valve curve of the Current Temperatures after sliding-model control The current setting valve of full valve.
- 5. the cold protection against overpressure method of nuclear power station according to claim described in 3, it is characterised in that the cold protection against overpressure side Method also includes：Adjusted according to the cold leg temperature, limiting pressure corresponding with the cold leg temperature and the pressurizer safety valve It is worth curve, determines the artesian condition of the pressure vessel；Corresponding prompt message is exported according to the artesian condition.
- 6. the cold protection against overpressure method of nuclear power station according to any one of claim 1 to 5, it is characterised in that the monitoring is high The working condition of pressure safety injection system includes；Obtain the pipeline flow of the either rank high-pressure safe injection system in multiple row high-pressure safe injection system；If the pipeline flow of the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system is more than default threshold Value, then be identified as high-pressure safe injection system and be in running status；If the pipeline flow of each row high-pressure safe injection system in the multiple row high-pressure safe injection system is no more than described Predetermined threshold value, then detect the fortune of the syringe pump of either rank high-pressure safe injection system in the multiple row high-pressure safe injection system Row state；If the syringe pump of the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system is currently running, examine Survey the cold leg injection valve state for the high-pressure safe injection system that the syringe pump is currently running；If the cold leg injection valve is in open mode, it is identified as high-pressure safe injection system and is in running status.
- A kind of 7. cold overpressure protection device of nuclear power station, it is characterised in that including：Monitoring modular, for monitoring the working condition of high-pressure safe injection system；Setting valve determining module, if being in running status for the high-pressure safe injection system, obtain internal pressure vessel walls Current Temperatures and pressurizer safety valve setting valve curve, and according to the Current Temperatures and the pressurizer safety valve setting valve Curve determines the current setting valve of the pressurizer safety valve；Setting valve adjusting module, for adjusting the setting valve of the pressurizer safety valve according to the current setting valve；Opening module, for detecting current pressure of the pressure vessel under the Current Temperatures, if the current pressure is big In the setting valve, then the pressurizer safety valve is opened.
- 8. the cold overpressure protection device of nuclear power station according to claim 1, it is characterised in that the setting valve determining module bag Include：Temperature acquiring unit, for obtaining multiple cold leg thermometric instruments of each presurized water reactor loop in multiple presurized water reactor loops Temperature signal, wherein, the cold leg thermometric instrument be arranged on the injection pipeline interface of the high-pressure safe injection system with Between the inlet nozzle of the pressure vessel, and close to the position of the inlet nozzle；Verification unit, each pressure water is obtained for carrying out validity check to the temperature signal, and according to check results The temperature of heap loop；Temperature order member, for determining the temperature of the internal pressure vessel walls according to the temperature of each presurized water reactor loop.
- 9. the cold overpressure protection device of nuclear power station according to claim 8, it is characterised in that the setting valve determining module is also Including：Curve acquisition unit, for obtaining pressurizer safety valve setting valve curve；The curve acquisition unit includes：First straight line obtains subelement, is reduced to for calculating the cold leg temperature from initial maximum temperature with pre-set velocity During multiple different temperature points, the pressure vessel can bear under multiple different temperature points multiple first limiting pressures, And first straight line is obtained according to the corresponding relation of multiple first limiting pressures and multiple different temperature points；The sub- acquiring unit of second straight line, when being in any temperature definite value for calculating the cold leg temperature, the temperature definite value Under the second limiting pressure that can bear of the pressure vessel, and according to pair of the temperature definite value and second limiting pressure Answer Relation acquisition second straight line；Curve acquisition subelement, for obtain different cold leg temperature in the first straight line and the second straight line on it is right The otherwise limit pressure answered, and less limiting pressure is taken in both as goal pressure corresponding to different cold leg temperature, The pressurizer safety valve setting valve is obtained according to the goal pressure and the cold leg temperature corresponding with the goal pressure Curve.
- 10. the cold overpressure protection device of nuclear power station according to claim 9, it is characterised in that the setting valve determining module Also include：Processing unit, for carrying out sliding-model control to the pressurizer safety valve setting valve curve；Setting valve determining unit, for the pressurizer safety valve setting valve curve according to the Current Temperatures after sliding-model control The middle current setting valve for determining the pressurizer safety valve.
- 11. the cold overpressure protection device of nuclear power station according to claim 9, it is characterised in that the cold overpressure protection device Also include：State determining module, for according to the cold leg temperature, limiting pressure corresponding with the cold leg temperature and institute Pressurizer safety valve setting valve curve is stated, determines the artesian condition of the pressure vessel；Reminding module, for exporting corresponding prompt message according to the artesian condition.
- 12. the cold overpressure protection device of nuclear power station according to any one of claim 7 to 11, it is characterised in that the monitoring Module includes；Pipeline flow acquiring unit, for obtaining the either rank high-pressure safe injection system in multiple row high-pressure safe injection system Pipeline flow；First recognition unit, if the pipe for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system Linear flow rate is more than predetermined threshold value, then is identified as high-pressure safe injection system and is in running status；First detection unit, if the pipe for each row high-pressure safe injection system in the multiple row high-pressure safe injection system Linear flow rate is not more than the predetermined threshold value, then detects the either rank high-pressure safe injection in the multiple row high-pressure safe injection system The running status of the syringe pump of system；Second detection unit, if the note for the either rank high-pressure safe injection system in the multiple row high-pressure safe injection system Penetrate pump to be currently running, then detect the cold leg injection valve state for the high-pressure safe injection system that the syringe pump is currently running；Second recognition unit, if being in open mode for cold leg injection valve, it is identified as high-pressure safe injection system System is in running status.
- 13. a kind of cold overpressure protection device of nuclear power station, including memory, processor and it is stored in the memory and can be The computer program run on the processor, it is characterised in that realized such as during computer program described in the computing device The step of cold protection against overpressure method described in any one of claim 1 to 6.
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