CN104282349B - Nuclear power plant is guided under a kind of fire condition to the method for safe condition - Google Patents
Nuclear power plant is guided under a kind of fire condition to the method for safe condition Download PDFInfo
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- CN104282349B CN104282349B CN201410384452.4A CN201410384452A CN104282349B CN 104282349 B CN104282349 B CN 104282349B CN 201410384452 A CN201410384452 A CN 201410384452A CN 104282349 B CN104282349 B CN 104282349B
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- fire
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- power plant
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- nuclear power
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
- G21D3/06—Safety arrangements responsive to faults within the plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The invention belongs to nuclear power plant design technology, and in particular under a kind of fire condition guide nuclear power plant to the method for safe condition.The method carries out combing to the existing operation of nuclear power plant, malfunction protocol first, cleans out and judges the key message being oriented to code for set state；For each fire protection space, unavailable function, equipment and information that combing fire is caused judge whether fire causes unacceptable consequence；If fire can cause unacceptable consequence, in addition to basic fire extinguishing, rescue action, in order to ensure that unit safety, operator execute specific operation.Unit is guided under the fire condition formed by the present invention to a series of action requirements of safe condition so that operation of the operator in case of fire to unit operation is evidence-based, reduce human-equation error, perfect nuclear power plant's accident treatment pattern.
Description
Technical field
The invention belongs to nuclear power plant design technology, and in particular under a kind of fire condition guide nuclear power plant to safe condition
Method.
Background technology
After Fukushima, Japan nuclear accident occurs within 2011, countries in the world generally improve the safety requirements to nuclear power station.I
State administration request design of nuclear power plant adopts state-of-the-art standard, with General Promotion nuclear power plant reliability and emergency response level, really
Protect the safety of nuclear power station.In addition to traditional fire prevention, the technological means for limiting fire spread and stamping out a fire, nuclear power is improved
Factory's fire safety level also needs to guarantee that unit correctly can be guided to safety recession pattern by operator in case of fire.
Therefore, the Accident Handling Method under research nuclear power plant fire condition is one of Main Trends of The Development of nuclear power fire protection design.
According to the current design of domestic majority nuclear power plants, when a fire, related operations staff and fire brigade
It is on that member both participates in fire fighting and rescue, and main control room operator is adopted by contacting live operator, fire brigade, rescue group etc.
The action such as calamity of getting fire confirmation, evacuating personnel, isolation ventilation, fire-extinguishing operations, contact with foreign countries and organization and administration, these operations and row
Dynamic is mature technology through practice test, and has been embodied in power plant's associated documents.
But, in addition to considering fighting and rescue operations and taking action, fire can also cause to have a strong impact on to safety related functions, and this
When which equipment and information be available and reliable, which equipment and information have been subjected to fire damage and unavailable, should
How to find a reliable operation path to guide unit to safe condition, operator is not to be perfectly clear, can only be according to existing
The region for having data and fire to occur provides probably judgement, it is possible to causes maloperation or misses optimal trip-reclosure time, Jin Eryin
Send out the risk that set state further deteriorates.
Content of the invention
Present invention aims to the defect of prior art, there is provided a kind of in case of fire by nuclear power plant guide to
The method of safe condition, instructs operator to be controlled nuclear power generating sets in case of fire by the method, and most machine at last
Group takes specific safe condition to.
Technical scheme is as follows：Nuclear power plant is guided under a kind of fire condition to the method for safe condition, including
Following steps：
(1) combing is carried out to the existing operation of nuclear power plant, malfunction protocol, cleans out and judge to lead with code for set state
To key message, these information are of crucial importance for the operation of unit and accident treatment, to judging that set state rises certainly
Qualitative effect, and operator can be guided to choose rational operation strategy；
(2) each fire protection space is directed to, whether unavailable function, equipment and information that combing fire is caused judge fire
Cause unacceptable consequence；
(3) if fire does not result in unacceptable consequence, fire is only adopted to unit safety function moment-less influence
Take basic fire extinguishing, rescue action；If fire can cause unacceptable consequence, step (4) is entered；
(4) in addition to basic fire extinguishing, rescue action, in order to ensure that unit safety, operator execute following operation：
A) available redundance unit is put into operation by foresight operation in advance, and starts corresponding operating as early as possible to guide
Unit reaches the recession pattern that specifies；Meanwhile, take the necessary precautionary measures to prevent the deterioration of set state in advance；
B) power operation, the power supply that the nuclear safety relevant device by influence of fire is actively cut off by operator；
C) marking operation, to by influence of fire, disabled function is marked；
D) alternative information or specified Value Operations are given, as by influence of fire, disabled information in case of fire will
No longer reliable, determine by the information of its redundancy or in advance the alternate parameter behaviour performed in case of fire to ensure operator
Make unit can be brought into the reliable behavior that specifies；
E) determine that recession pattern is operated, the recession pattern to be referred to and the disabled situation of Partial security function is caused in fire
Under, the acceptable safe condition that unit can reach and maintain；
F) record other because of fire disabled equipment, information and false alarm.
Further, nuclear power plant is guided under fire condition as above to the method for safe condition, described in step (2)
Unacceptable consequence include：
1) one or more support functions are completely lost, supports function i.e. in order to ensure nuclear steam supply system (Normal
Steam Supply System, abbreviation NSSS) validity and required function, mainly include function of supplying power, for airway dysfunction,
Instrument control function, refrigerating function etc.；
2) reactor emergency shut-down that is foreseeable or having occurred and that, while normally run work(with nuclear steam supply system
Can failure；
3) failure of the normal operation function of nuclear steam supply system may cause event transient state or accident transient state；
4) other unacceptable consequences.
Beneficial effects of the present invention are as follows：The present invention brings fire in the Incident Management system of unit operation into first,
Optimize the operation strategy under fire condition, improve the safety management level of nuclear power generating sets after fire occurs；Formed by the method
Fire condition under unit is guided to a series of action requirements of safe condition so that operator is in case of fire to unit
The operation of operation is evidence-based, reduces human-equation error, perfect nuclear power plant's accident treatment pattern.
Description of the drawings
Fig. 1 is the method flow diagram under fire condition of the present invention guided nuclear power plant to safe condition.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in detail.
As shown in figure 1, nuclear power plant is guided to the method for safe condition under a kind of fire condition of present invention offer, including
Following steps：
(1) combing is carried out to the existing operation of nuclear power plant, malfunction protocol, finds those set states and judge and code guiding
Key message, these information are of crucial importance for the operation of unit and accident treatment, determine to judging that set state rises
Property effect, and operator can be guided to choose rational operation strategy；
(2) each fire protection space, unavailable function, equipment and information that combing fire is caused is directed to, and judges that fire is
No can cause unacceptable consequence as follows：
One or more support functions 2-1) are completely lost, supports function i.e. in order to ensure nuclear steam supply system
The validity of (Normal Steam Supply System, abbreviation NSSS) and required function, mainly include function of supplying power, confession
Airway dysfunction, instrument control function, refrigerating function etc.；
Reactor emergency shut-down that is 2-2) foreseeable or having occurred and that, while with nuclear steam supply system (Normal
Steam Supply System, abbreviation NSSS) normal operation function failure；
2-3) failure of the normal operation function of certain nuclear steam supply system (NSSS) may cause event transient state or accident
Transient state (for example, loses down under primary Ioops single phase and lets out function)；
2-4) other unacceptable consequences；
(3) if fire does not result in the unacceptable consequence described in step (2), fire to unit safety function without
Significant impact, only takes basic fire extinguishing, rescue etc. to take action；
(4) if fire causes one of unacceptable consequence described in step (2), except basic fire extinguishing, rescue row
Dynamic outer, in order to ensure that unit safety, operator also need to execute following operation：
A) foresight operation, on the one hand, in order to reduce impact of the fire to unit operation, in advance by available redundance unit
Put into operation, and start corresponding operating as early as possible to guide unit to reach the recession pattern that specifies；On the other hand, in order to prevent fire
Some unnecessary transient states that calamity causes need to take the necessary precautionary measures in advance so as to cause the deterioration of set state；
B) power operation, for clear and definite NSSS functional statuses, to reduce the risk that equipment malfunction is made and sends instruction by mistake, by
Operator actively cuts off some nuclear safety relevant devices by influence of fire；
C) marking operation, in order to optimize the execution of accident treatment program, makes operator accurately be judged in time, quickly locates
Reason accident conditions, and corresponding " replacement " equipment that directly puts into operation after the unavailable information of function is known, to by influence of fire
Disabled function (including NSSS functions and supporting function) is marked；
D) alternative information or specified Value Operations are given, due to by influence of fire and disabled information (including condition adjudgement
And navigation information) in case of fire will be no longer reliable, alternate parameter is determined by the information of its redundancy or in advance ensureing to grasp
Unit can be brought into the reliable behavior that specifies for vertical member operation performed in case of fire；
E) determine that recession pattern operation (i.e. final safe condition), the recession pattern refer to that consideration is disabled and set
Standby, the acceptable safe condition that unit can reach and maintain；
F) in addition to above-mentioned main unavailable function and information, record other because of fire disabled equipment, information
And false alarm, the disabled details of equipment that fire causes, the monolithic to unit is understood in more detail for operator
State has the understanding and control of the overall situation.
In the case where the impact that nuclear power plant's fire is caused meets step (2), (i.e. fire is caused to unit operation and safety
Have a strong impact on), a series of action requirements that operator is formed according to step (4) form a set of operational procedure, so as in fire feelings
Unit is taken and maintains to specify safe condition under condition.
Embodiment
Now by taking certain nuclear power plant's nuclear auxiliary building hot penetration piece place fire protection space (numbering is as 1ZFSN0280A) as an example, adopt
Method nuclear power plant guided to safe condition under above-mentioned fire condition is progressively analyzed as follows：
First, all accident treatment codes of the nuclear power plant are analyzed, clean out
The key message of guiding, including primary Ioops pressure, water level, temperature, undersaturation degree, secondary circuit pressure, water level, containment pressure and
Dosage water equality monitor value.
Secondly, the cable and equipment in fire protection space 1ZFSN0280A is analyzed.Special in conjunction with fire risk and equipment
Property draws：Fire can cause lower pressure release power and flow control valve (RCV 013VP) and charging flow regulating valve (RCV 046VP) complete
Open, the outer isolating valve (RCV 010VP) of letdown line containment fully closed, that is, cause on fill standard-sized sheet and under let out isolation, cause to fill with
Under the normal operation functions of NSSS let out unavailable, simultaneously because on fill and under the flow let out mismatch, can also cause voltage-stablizer liquid
Position rises rapidly and produces " high 3 " the reactor scram signal of voltage-stablizer liquid level.In addition, fire will also cause fills lower earial drainage
Amount information, voltage-stablizer auxiliary spray, high-pressure safety injection, residual heat removal system (RRA) and cvcs (RCV) interface
Function is unavailable etc..
According to above-mentioned analysis result, propose following action and require, to alleviate the result of accident treatment：
A) foresight operation
(1) when reactor capability is more than 10% full power (P>P7) during running status, due to above fill and under the flow let out not
Coupling, causes voltage-stablizer liquid level to rise rapidly and produce " P7 allows voltage-stablizer liquid level height under signal " reactor emergency shut-down letter
Number, therefore it is required that operator confirms that emergency shut-down requirement is performed at the very start, and take fill in isolation and under the action let out,
Simultaneously because volume control tank (RCV 002BA) liquid level declines, need to confirm RCV Pump Suction Nozzles from RCV 002BA change to
The operation of material-changing water tank (PTR 001BA)；
Let out due under and isolated, then main pump shaft water shutoff injection will cause primary Ioops water loading amount to rise, in order to avoid causing
Primary Ioops superpressure, needs to carry out primary Ioops cooling down operation by the atmospheric dump valve (GCTa) of three steam generators, and will
Unit band is to residual heat removal system (RRA) connection status.
(2) when reactor is less than 10% full power (P in power<P7) running status, steam generator cooling normally stop
When heap pattern (NS/SG) or RRA cooling normal shutdown pattern two-phase state (NS/RRA biphasic), same P is taken>P7 states
Same operation, the confirmation of reactor emergency shut-down operation are consistent with the requirement of the malfunction protocol of power plant.
(3) when reactor in RRA coolings normal shutdown pattern single phase (NS/RRA monophasic) or is keeped in repair cold
When shutdown and primary Ioops are closed mode, easily mismatch and cause primary Ioops superpressure transient state due to above filling letdown flow, now
Operation will be using the operation strategy with " be oriented to and stable code " (DOS) under similar state.
B) power operation
As some equipment or its service cable are located at this fire protection space, these equipment probably due to fire and fail.
For reducing equipment malfunction work, clear and definite set state, operator is actively cut off the power supply of these equipment, specific to this fire protection space
For：On fill pump house Emergency Venting System blower fan (DVH 001ZV), safety injection system boric acid recirculation pump (RIS 022PO), boron heating
The equipment such as system power cabinet (RRB 001TB, 002TB) and cvcs isolating valve (RCV 010VP,
The power supply of valve such as RCV094VP).
C) mark
The disabled function by influence of fire (including NSSS functions and supporting function) is marked, RCV is announced
On fill, under let out, aid in the functions such as spray, high-pressure safety injection, RRA and RCV interfaces unavailable.
D) alternative information or designated value
For guarantee information reliability, to being subject to influence of fire and disabled information (including condition adjudgement and navigation information)
Carry out pressure assignment or using alternative redundancy, primary Ioops letdown flow information (RCV005MD) are forced to 0, one time
Road charging stream amount information (RCV 018MD) is forced to 0, and peace note flow information (RCV 021MD, 022MD and 023MD) record is initial
Value, the RIS 099MD information failed using RIS 001MD information substitutions.
E) determine recession pattern (i.e. final safe condition)
If fire occurs under unit normal operation, pattern of unit dropping back is intervened for normal shutdown-RRA, two
Shutdown in the middle of phase；If fire occurs in the case where primary Ioops are full water state, recession pattern is let out for cold shutdown RCP systems
Die pressing type.
F) other disabled equipment, information and false alarms are provided
In addition to above-mentioned critical function and information, also record other because of fire unavailable device, valve and information, specific to
This fire protection space is the unavailable information of the systems such as DVH, KRT, RCV, REA, RIS.
Finally, require to form a targetedly main control room operator operation rule in case of fire by above-mentioned action
Journey.When there is fire in fire protection space 1ZFSN0280A, operator in the case where the code is guided, by calling the rule of other correlations
Journey, takes and maintains unit to specify safe condition.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the invention and modification are belonged to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprising these changes and modification.
Claims (1)
1. nuclear power plant is guided to the method for safe condition under a kind of fire condition, comprised the steps：
(1) combing is carried out to the existing operation of nuclear power plant, malfunction protocol, cleans out and judge and code guiding for set state
Key message；
(2) each fire protection space is directed to, unavailable function, equipment and information that combing fire is caused judge fire whether to machine
Group security function causes significant impact；Described includes to the significant impact that unit safety function is caused：
1) one or more support functions are completely lost；
2) reactor emergency shut-down that is foreseeable or having occurred and that, while with the normal operation function of nuclear steam supply system
Failure；
3) failure of the normal operation function of nuclear steam supply system may cause event transient state or accident transient state；
4) significant impact that other are caused to unit safety function；
(3) if fire will not cause significant impact to unit safety function, basic fire extinguishing, rescue action are only taken；If
Fire can cause significant impact to unit safety function, then enter step (4)；
(4) in addition to basic fire extinguishing, rescue action, in order to ensure that unit safety, operator execute following operation：
A) available redundance unit is put into operation by foresight operation in advance, and starts corresponding operating as early as possible to guide unit
Reach the recession pattern that specifies；Meanwhile, take the necessary precautionary measures to prevent the deterioration of set state in advance；
B) power operation, the power supply that the nuclear safety relevant device by influence of fire is actively cut off by operator；
C) marking operation, to by influence of fire, disabled function is marked；
D) alternative information or specified Value Operations are given, as by influence of fire, disabled information in case of fire will no longer
Reliable, determine by the information of its redundancy or in advance the alternate parameter operation energy performed in case of fire to ensure operator
Unit is brought into the reliable behavior that specifies；
E) determine that recession pattern is operated, the recession pattern is referred in the case of fire causes Partial security function disabled,
The acceptable safe condition that unit can reach and maintain；
F) record other because of fire disabled equipment, information and false alarm.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106846169B (en) * | 2016-12-20 | 2020-09-18 | 岭东核电有限公司 | Method and device for controlling nuclear power plant under fire condition |
| CN107564595B (en) * | 2017-08-21 | 2019-07-19 | 中广核工程有限公司 | A kind of processing method and system of nuclear power plant's fire operation common mode |
| CN107863168B (en) * | 2017-11-15 | 2020-04-07 | 苏州热工研究院有限公司 | Method for analyzing withdrawal time of nuclear power unit when power operation loses final heat trap |
| CN107945897B (en) * | 2017-11-15 | 2020-07-17 | 中广核工程有限公司 | Method and device for processing nuclear power accidents |
| CN109235545B (en) * | 2018-10-15 | 2023-08-29 | 上海凯泉泵业（集团）有限公司 | Outdoor movable intelligent pump house for emergency rescue water supply |
| CN109597393B (en) * | 2018-11-15 | 2021-03-19 | 中国核电工程有限公司 | Design implementation method for key safety function in accident handling strategy of nuclear power plant |
| CN116543944A (en) * | 2020-10-26 | 2023-08-04 | 苏州热工研究院有限公司 | Assessment method for safety shutdown path of fire accident of nuclear power plant |
| CN112349441B (en) * | 2020-10-27 | 2022-04-26 | 岭澳核电有限公司 | Safety processing method for cable fire misoperation of nuclear power plant |
| CN115050157A (en) * | 2022-06-10 | 2022-09-13 | 中国矿业大学(北京) | Fire control monitor terminal and fire control safety coefficient |
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