CN106683728A - Accident diagnosis method based on unit state - Google Patents
Accident diagnosis method based on unit state Download PDFInfo
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- CN106683728A CN106683728A CN201611191220.2A CN201611191220A CN106683728A CN 106683728 A CN106683728 A CN 106683728A CN 201611191220 A CN201611191220 A CN 201611191220A CN 106683728 A CN106683728 A CN 106683728A
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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
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- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to an accident diagnosis method based on a unit state. The accident diagnosis method comprises the following steps of first, according to the type and severity of the consequences of an accident, dividing accident conditions into a plurality of accident levels; second, according to boundary conditions of the accident levels, diagnosing the accident level to which the current unit state belongs; and third, after determining the accident level, according to the boundary conditions of typical accidents, determining whether the current accident belongs to the typical accidents, if so, implementing specific accident handling procedures for the type of the typical accident, and otherwise, implementing common handling procedures for the accident. The accident diagnosis method covers all the accident conditions with no cross area among different accident diagnosis, the potential risk of poor coordination of personnel is avoided, and the targeted handling procedures for the current accident can thus be quickly and accurately found to prevent the accident from worsening.
Description
Technical field
The invention belongs to accident diagnosis field, and in particular to a kind of accident diagnosis method based on set state.
Background technology
Nuclear power station or other fields are the various accident conditionses of reply, in addition to engineered safety system and aid system, also need to set
In respect of the accident treatment code system of complete set, operate for the operator after accident.In view of nuclear power plant or other fields are sent out
Complicated accident scenarios are carried out classification summary, shape by the multiformity and complexity of raw accident scenarios in accident treatment code system
Into the accident conditions of some classifications, each class operating mode has similar set state or development trend, can perform similar process
Step carries out the alleviation of accident, is processed with a certain concrete code in accident treatment code system.
After accident occurs, the examination that a certain class type of fault is belonged to accident conditions is accident diagnosis, generally using one
This complete code is completed, and is the first step after operator's intervention accident treatment code.Accident diagnosis are accident treatment codes
A highly important ring in system, is only correctly diagnosed to be accident pattern and leads into correct treatment measures code,
Accident can be alleviated with effective.
Accident diagnosis should be consistent with the scope of application of each concrete accident treatment code, and in fact each code is suitable
Should be used as working out the foundation of diagnosis content with scope, in general, the content of diagnosis is unit to each code scope of application
Accident conditions under automated to respond to situation, including the side such as degradation situation, the response of security system, the warning of set state parameter
Face content.
Traditional event targeting diagnosis are present for superposition accident treatment is difficult to Accurate Diagnosis and the inferior position for processing；In this base
On plinth develop station guide diagnosis then exist for clear and definite accident conditions operator can to current accident scenarios ambiguous,
Process step is lengthy and jumbled, and is difficult to efficiently carry out the inferior position of accident mitigation；There is operator's workload greatly in sign targeting diagnosis, behaviour
The inferior position of inaccurate coordination between work person.
The content of the invention
For defect present in prior art, the present invention provides a kind of accident diagnosis method based on set state, energy
Enough to cover whole accident conditionses, including all kinds of superposition accidents, the Diagnostic parameters and diagnostic threshold of accident can accomplish unicity and existing
Reality such that it is able to fast and accurately navigate to specific aim treatment measures corresponding with current accident, can be efficient to accident
Alleviated.
To reach object above, the technical solution used in the present invention is：A kind of accident diagnosis based on set state are provided
Method, comprises the steps：
1) according to the type and seriousness of damage sequence, accident conditions is divided into into some incident classifications；
2) according to the boundary condition of incident classification, the accident rank belonging to current set state is diagnosed；
3) in current accident rank, according to the boundary condition of the corresponding representative accident of accident rank current thing is judged
Therefore whether belong to a certain representative accident type；If current accident belongs to a certain representative accident type, execution is directed to this
The exclusive accident treatment code of representative accident type, will otherwise perform the general treatment measures under the incident classification.
Further, step 2) in, the boundary condition of the incident classification refers to the work(that different incident classifications are characterized after accident
The combination of the parameter threshold that can degrade or lose.
Further, the function degradation or the parameter of forfeiture of the different incident classifications and the combination of threshold value are by covering
The comprehensive accident analysiss of accident conditions scope calculate iteration summary and obtain.
Further, step 2) in, in the accident rank belonging to current set state is diagnosed, the boundary condition of incident classification
The boundary characteristic between each incident classification should be able to be clearly embodied, the boundary characteristic between each incident classification should meet clear accurate
Requirement, and should meet can after envelope unit failure whole security functions integrity demands.
Further, step 3) in, the representative accident type is degraded with different and representative security functions
Degree feature, these representative functions degrade and are combined into the boundary condition of representative accident.
Further, step 3) in, during the diagnosis of representative accident type, accident diagnosis parameter and threshold value should be able to expire
There is no intersection region between the diagnosis of that is, different accidents only for existing in the Analyses of Typical Accidents in foot.
The present invention Advantageous Effects be：
(1) accident diagnosis method of the invention, using the embedded Analyses of Typical Accidents in accident condition grading diagnosis structure
The multi-layer deagnostic structure of diagnosis, is targetedly processed so as to can accurately finding exclusive accident treatment code and performing to have
Measure, high efficiency is alleviated accident and is further occurred；
(2) to accident superimposition condition, can be by the general Erosive Accident in its affiliated accident conditions level
Reason, it is ensured that the integrity of accident treatment code system；
(3) malfunction protocol system is clear, and accident diagnosis adopt one-line format, it is to avoid personnel coordinate not smooth potential wind
Danger；
(4) accident diagnosis parameter threshold is drawn by reality hypothesis with the best-estimated model analysiss, it can be ensured that operator exists
Accurately judgement is made during accident diagnosis.
Description of the drawings
Fig. 1 is the basic flow sheet of incident classification diagnostic method；
Fig. 2 is Analyses of Typical Accidents diagnostic method flow chart；
Fig. 3 is the flow chart of the explanation accident diagnosis method of the present invention by taking heat-transfer pipe of evaporator fracture as an example.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in further detail.
The accident diagnosis method based on set state that the present invention is provided, in being utilized in accident condition grading diagnosis structure
The multi-layer deagnostic structure of embedded Analyses of Typical Accidents diagnosis.
First, according to the type and seriousness of damage sequence, accident conditions is divided into into some incident classifications.
There is similar accident progress to affect and the damage sequence order of severity between each incident classification.It is with nuclear power station
Example, the big security function criterion of nuclear power station three can be used as the reference of incident classification classification with the acceptance criteria of accident conditions.Meanwhile, according to
According to analysis and combing to accident result of calculations such as accident phenomenon, damage sequence and fail- safe response actions, can be by accident etc.
Level is divided into Latent destruction primary Ioops integrity, potential radioactivity to Environment release, Latent destruction containment integrity, potential impact
It is core structure integrity, potential to major accident five grades of excessive trend.In the type of fault of each grade correspondence one or
Multiple representative accidents and other possible superposition accidents, such as potential radioactivity is coated with the accident conditions of Environment release level
Evaporator heat transfer shape pipe breaking accident SGTR, at the same also include in addition to SGTR other be likely to result in thing of the radioactivity to Environment release
Therefore scene.Table 1 is the corresponding boundary condition of each incident classification and the Analyses of Typical Accidents for including：
Table one
Secondly, according to the boundary condition of incident classification, the accident rank belonging to current set state is diagnosed.Damage sequence
Rating scale describes the combination of the degradation degree of the one or several functions of unit, and these functions degrade for the safe work(of unit
Different degrees of impact can be produced.Incident classification is the combination by the one or several Parameters variation degree that can characterize function
To express.According to the flow process description to nuclear power generating sets neutronics, Heat And Mass Transfer, mass-energy conversion and safeguard protection and function
Parameter merges to be summarized, it may be determined that required parameter.The boundary condition of incident classification describes to characterize different accidents after accident
The combination of the function degradation of grade or the parameter lost and threshold value, representation function degrades or the parameter and threshold value of forfeiture are to be based on to be
System design requirement analysis, all kinds of origination events calculate the comprehensive assessment analysis of analysis and draw.
Sketch by taking potential impact core structure integrity this incident classification as an example below, the function of the incident classification envelope
It is downgraded to residual heat of nuclear core discharge function severe degradation and primary Ioops water loading amount function severe degradation.Assert here based on preliminary analyses
The degree that the two functions degrade can be described under class incident classification using core exit degree of supercooling and pressure vessel water loading amount.According to
Accident and superposition accident are originated according to all kinds of, in different assumed conditions and numerous accident analysiss knot of superposition miscellaneous equipment disabler
Really, comprehensive analysis is carried out to wherein core exit degree of supercooling, can be assessed after residual heat of nuclear core discharge function severe degradation, reactor core goes out
Temperature of making a slip of the tongue can reach 200 DEG C (by way of example only), in addition again comprehensive assessment operator recovery operation response, the numerical value pair
The factors such as the impact of damage in-pile component, assert that the numerical value is the representative condition for characterizing residual heat of nuclear core discharge function severe degradation.
Primary Ioops water loading amount function degrade it is main consider that design of pressure vessels is required, this degradation degree mainly for Core uncovering, comprehensive
The response in reactor core display, and accident analysiss with regard to primary Ioops moisturizing in consideration pressure vessel is closed, liquid is confirmed after comprehensive assessment
It is the representative condition for characterizing primary Ioops water loading amount function severe degradation that position reaches reactor core bottom (by way of example only).Therefore the thing
Therefore the boundary condition of grade can be set to the core exit degree of superheat more than 200 DEG C or pressure vessel water level is less than reactor core bottom water
Position.
The diagnosis process of incident classification is directed to, its Diagnostic parameters should be able to clearly embody the border between each incident classification
Feature, should meet can after envelope unit failure whole security functions integrity demands.Diagnostic parameters should keep certain journey
The multiformity of degree, it is that may be present altogether because of risk to avoid, in addition to set state parameter, the signal of set state is characterized (as pacified
Note signal), the state of engineered safety system and aid system equally can be participated in accident diagnosis.
Finally, in current accident rank, judge to work as according to the boundary condition of the corresponding representative accident of accident rank
Whether front accident belongs to a certain representative accident type；If current accident belongs to a certain representative accident type, execution is directed to
In the exclusive accident treatment code of representative accident type, will otherwise the general treatment measures under the incident classification be performed.
All kinds of representative accidents all have different and representative security function degradation degree features, and these have representative
Property function degrade and be combined into the boundary condition of representative accident, the parameter included in representative accident boundary condition is without complete
The requirement of property, is made up of under normal circumstances small number of parameter.The diagnosis process of representative accident is directed to, Diagnostic parameters should be deposited
In certain redundancy, diagnostic threshold should be able to be met only for existing in the Analyses of Typical Accidents, i.e., the diagnosis of different accidents
Between there is no intersection region.
Accident level diagnostic method will be illustrated with below, as shown in figure 1, the method comprises the steps：
1) according to potential to major accident excessive boundary conditional diagnosis, it is " potential to serious to judge whether current accident belongs to
Accident is excessive " accident, if belonging to " potential excessive to major accident " accident, into representative accident diagnostic process, according to allusion quotation
Type accident diagnosis flow processing；
If 2) be not belonging to " potential excessive to major accident " accident, according to potential impact core structure integrity accident
Boundary condition is diagnosed, and judges whether to belong to " potential impact core structure integrity " accident, if belonging to, " potential impact reactor core is tied
Structure integrity " accident, then into representative accident diagnostic process, according to the process of representative accident diagnostic process；
If 3) " potential impact core structure integrity " accident is not belonging to, according to Latent destruction containment integrity accident
Boundary condition is diagnosed, and judges whether to belong to " potentially destroying containment integrity " accident, if belonging to " potential destruction safety
Shell integrity " accident, then into representative accident diagnostic process, according to the process of representative accident diagnostic process；
If 4) " potentially destroying containment integrity " accident is not belonging to, according to potential radioactivity to Environment release accident
Boundary condition is diagnosed, and judges whether to belong to " potential radioactivity is to Environment release " accident, if belonging to, " potential radioactivity is to environment
Release " accident, then into representative accident diagnostic process, according to the process of representative accident diagnostic process；
If 5) " potential radioactivity is to Environment release " accident is not belonging to, according to the complete sexual behavior of Latent destruction one, secondary circuit
Therefore boundary condition is diagnosed, judge whether to belong to potential " destruction one, secondary circuit integrity " accident, if belonging to " destruction one, two times
Road integrity " accident, then into representative accident diagnostic process, according to the process of representative accident diagnostic process.
By that analogy, until all of accident level diagnostic is finished, the accident level diagnostic is terminated.
Then, judge whether current accident belongs to a certain allusion quotation according to the boundary condition of representative accident in current incident classification
Type accident pattern, if may determine that, current accident conditions belongs to a certain representative accident type, and execution is directed to the representative accident
The exclusive accident treatment code of type, will otherwise perform the general procedure measure under the incident classification.
As shown in Fig. 2 by taking " potential impact core structure is complete " as an example, illustrate representative accident diagnostic process, it include as
Lower step：
31) according to primary coolant circuit pipe large break accident diagnosis parameter diagnosis, (a secondary circuit pressure reduction is high, primary Ioops pressure is low
Or coolant water loading amount is low), if the accident has the characteristic feature of primary coolant circuit pipe large break, according to primary Ioops large break thing
Therefore process code and process；
If 32) accident is not belonging to the characteristic feature of primary coolant circuit pipe large break, according to Diagnostic parameters diagnosis (all
Vaporizer liquid level is low, auxiliary feedwater is lost), if having whole loss of feedwater accident characteristic features, lose according to all feedwater
Lose accident treatment code to process；
33) if diagnosis is not belonging to whole loss of feedwater accidents, diagnosed into station blackout accident Diagnostic parameters
(main transformer, auxiliary change dead electricity or diesel-driven generator are unavailable), if having station blackout accident characteristic feature, according to station blackout
Process code to process, if being not belonging to station blackout accident characteristic feature, according to affecting, core structure integrity accident is general
Process code.
As shown in figure 3, illustrating to the diagnostic method of the present invention by taking heat-transfer pipe of evaporator fracture accident as an example：
After evaporator heat transfer tracheal rupture, because of the low triggering peace note signal of primary Ioops pressure, operator diagnoses into accident treatment
Flow process, starts to perform incident classification diagnosis；
41) according to the boundary condition diagnosis that the temperature of core exit is very high, the undirected major accident development of accident is determined
Trend, so being not belonging to the potential grade accident excessive to major accident；
42) according to the core exit degree of superheat is high and coolant water loading amount lower boundary conditional diagnosis, determine accident without potential shadow
The integrity consequence of core structure is rung, so being not belonging to potential impact core structure integrity levels accident；
43) according to pressure flash circle conditional diagnosis in radioactivity height in containment or containment, determine accident without potential broken
Bad containment integrity consequence, so being not belonging to the grade accident without Latent destruction containment integrity；
44) according to the high border conditional diagnosis of vaporizer secondary side radioactivity, it is determined that having potential radioactivity to after Environment release
Really, so belonging to potential radioactivity to Environment release grade accident；
45) diagnosed to the corresponding Analyses of Typical Accidents flow process of Environment release grade accident into radioactivity, it is determined that should
Accident has typical SGTR consequences feature, then into SGTR accident treatment codes, the accident diagnosis terminate.
Thus, the consequence of heat-transfer pipe of evaporator fracture accident is that radioactive substance enters a secondary circuit, potential to cause radiation
Property but does not result in the severe exacerbation of reactor core to the risk of Environment release, may belong to " have potential radioactivity in accident level
To Environment release consequence " accident, there are radiation characteristics for secondary circuit in accident border, can be with one or two times in typical event diagnosis
The signals such as road radioactivity is high, vaporizer liquid level is high, peace note startup are used as Diagnostic parameters.There is accident and belongs to have steaming in diagnosis confirmation
After sending out the accident of device heat-transfer pipe fracture characteristic feature, the accident treatment code for being directed to SGTR is entered.
The present invention's is not limited to above-mentioned specific embodiment, art technology based on the accident diagnosis method of set state
Personnel's technology according to the present invention scheme draws other embodiments, also belongs to the technological innovation scope of the present invention.
Claims (6)
1. a kind of accident diagnosis method based on set state, comprises the steps：
1) according to the type and seriousness of damage sequence, accident conditions is divided into into some incident classifications；
2) according to the boundary condition of incident classification, the accident rank belonging to current set state is diagnosed；
3) in current accident rank, judge that current accident is according to the boundary condition of the corresponding representative accident of accident rank
It is no to belong to a certain representative accident type；If current accident belongs to a certain representative accident type, execution is directed to the typical case
The exclusive accident treatment code of accident pattern, will otherwise perform the general treatment measures under the incident classification.
2. a kind of accident diagnosis method based on set state as claimed in claim 1, is characterized in that：Step 2) in, it is described
The boundary condition of incident classification refers to the group of the function degradation that different incident classifications are characterized after accident or the parameter lost and threshold value
Close.
3. a kind of accident diagnosis method based on set state as claimed in claim 2, is characterized in that：Described different accidents etc.
The combination of the function degradation of level or the parameter lost and threshold value is by covering the comprehensive accident analysiss meter of accident conditions scope
Calculate iteration summary to obtain.
4. a kind of accident diagnosis method based on set state as claimed in claim 2, is characterized in that：The border of incident classification
Condition should be able to clearly embody the boundary characteristic between each incident classification, and the boundary characteristic between each incident classification should meet clearly
Accurately require, and should meet can after envelope unit failure whole security functions integrity demands.
5. a kind of accident diagnosis method based on set state as claimed in claim 1, is characterized in that：Step 3) in, it is described
Representative accident type is with different and representative security function degradation degree features, these representative functions
Degradation is combined into the boundary condition of representative accident.
6. a kind of accident diagnosis method based on set state as claimed in claim 5, is characterized in that：Step 3) in, in allusion quotation
During the diagnosis of type accident pattern, accident diagnosis parameter and threshold value should be able to be met only for depositing in the Analyses of Typical Accidents
There is no intersection region between the diagnosis of that is, different accidents.
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Cited By (7)
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| CN107863168A (en) * | 2017-11-15 | 2018-03-30 | 苏州热工研究院有限公司 | A kind of nuclear power generating sets Power operation loses the recession time series analysis method of ultimate heat sink |
| CN108665185A (en) * | 2018-05-22 | 2018-10-16 | 中国核电工程有限公司 | A kind of design method of nuclear power plant's malfunction protocol scope of application |
| CN109087721A (en) * | 2018-07-09 | 2018-12-25 | 中国核电工程有限公司 | A kind of PWR nuclear power plant method for diagnosing faults |
| CN111639831A (en) * | 2020-04-20 | 2020-09-08 | 中国核电工程有限公司 | System expansion application method for containment accident condition treatment |
| CN111681794A (en) * | 2020-06-19 | 2020-09-18 | 中国核动力研究设计院 | Full-range SGTR accident handling method and system for pressurized water reactor nuclear power plant |
| CN111967711A (en) * | 2020-07-07 | 2020-11-20 | 中国核电工程有限公司 | Method for determining unfavorable working conditions in containment related to accident strategy of pressurized water reactor nuclear power plant |
| CN113408322A (en) * | 2020-03-16 | 2021-09-17 | 大同煤矿集团有限责任公司 | Method and device for identifying water inrush situation in mine |
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| CN107863168A (en) * | 2017-11-15 | 2018-03-30 | 苏州热工研究院有限公司 | A kind of nuclear power generating sets Power operation loses the recession time series analysis method of ultimate heat sink |
| 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 |
| CN108665185A (en) * | 2018-05-22 | 2018-10-16 | 中国核电工程有限公司 | A kind of design method of nuclear power plant's malfunction protocol scope of application |
| CN109087721A (en) * | 2018-07-09 | 2018-12-25 | 中国核电工程有限公司 | A kind of PWR nuclear power plant method for diagnosing faults |
| CN113408322A (en) * | 2020-03-16 | 2021-09-17 | 大同煤矿集团有限责任公司 | Method and device for identifying water inrush situation in mine |
| CN113408322B (en) * | 2020-03-16 | 2022-12-02 | 大同煤矿集团有限责任公司 | Method and device for identifying sudden permeable scene in mine |
| CN111639831A (en) * | 2020-04-20 | 2020-09-08 | 中国核电工程有限公司 | System expansion application method for containment accident condition treatment |
| CN111639831B (en) * | 2020-04-20 | 2024-04-12 | 中国核电工程有限公司 | System expansion application method for handling safety shell accident condition |
| CN111681794A (en) * | 2020-06-19 | 2020-09-18 | 中国核动力研究设计院 | Full-range SGTR accident handling method and system for pressurized water reactor nuclear power plant |
| CN111681794B (en) * | 2020-06-19 | 2022-02-22 | 中国核动力研究设计院 | Full-range SGTR accident handling method and system for pressurized water reactor nuclear power plant |
| CN111967711A (en) * | 2020-07-07 | 2020-11-20 | 中国核电工程有限公司 | Method for determining unfavorable working conditions in containment related to accident strategy of pressurized water reactor nuclear power plant |
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