CN103258577A - Method for break simulation in high energy pipe leakage monitoring experiment of nuclear power station - Google Patents
Method for break simulation in high energy pipe leakage monitoring experiment of nuclear power station Download PDFInfo
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- CN103258577A CN103258577A CN2013101309874A CN201310130987A CN103258577A CN 103258577 A CN103258577 A CN 103258577A CN 2013101309874 A CN2013101309874 A CN 2013101309874A CN 201310130987 A CN201310130987 A CN 201310130987A CN 103258577 A CN103258577 A CN 103258577A
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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
Abstract
The invention relates to a method for leakage source break simulation in a high energy pipe leakage monitoring experiment of a nuclear power station. Under the condition that the simulated pipe size can allow direct processing of a break, the break is directly preset in an experimental straight pipe, under the action of pressure difference between inside and outside of the pipe, a medium directly leaks from the preset break in the pipe wall and triggers a sound emission signal; under the condition that the simulated pipe size is difficult for direct processing of the break, an expansion hole is formed in the pipe wall of the experimental straight pipe, and an expansion groove surrounding the expansion hole is formed in the external wall of the experimental straight pipe, the other end of the expansion groove is provided with a leakage break simulation test piece, under the action of pressure difference between inside and outside of the pipe, the medium expands to the expansion groove through the expansion hole in the pipe wall, and then, the medium leaks from the break preset in the leakage break simulation test piece and triggers the sound emission signal. According to the method, the problem of leakage break simulation of the high energy pipe leakage monitoring experiment rig of the nuclear power station is solved, and a foundation for the high energy pipe leakage monitoring experiment is laid.
Description
Technical field
The invention belongs to nuclear industry simulation test research field, be specifically related to the method for a kind of nuclear power station high energy line leakage test source of leaks cut simulation, can be applicable to nuclear power station high energy line leakage test-bed.
Background technology
After the Fukushima, Japan accident, nuclear plant safety and reliability have been proposed requirements at the higher level, particularly the relevant high energy line leakage of nuclear safety requires to adopt broken preceding leakage technology.
Building in the design of nuclear power station in the past, all be to adopt conventional meanses such as melt pit liquid level, water loading amount balance to monitor to high energy pipeline medium leakage monitoring, the overall corresponding time of monitoring of these monitoring meanss is very long, and can't to can not identified leakage position, quantitative measurment.
In order to improve the response time of high energy line leakage, accurate measurement to the accurate location of leakage point and leakage rate, need be in the local leakage monitoring of high energy pipeline increase system, the local leakage monitoring means that generally adopt are acoustic emission leakage monitoring technology at present, and therefore acoustic emission leakage monitoring technology is applied to nuclear power station high energy line leakage has become a kind of development trend.Investigation according to current domestic and international Related product, major applications only is confined to the observational measurement of leaking, still do not have ripe product and can directly apply to the specific high energy line leakage of nuclear power station location, quantitative measurment, need carry out data fitting by simulation test, therefore building the test-bed that meets the acoustic emission leakage monitoring also becomes the inevitable choice that the acoustic emission Quantitative Monitoring is leaked, and so how approximate simulation high energy pipe leakage sound property becomes the key of acoustic emission leakage monitoring test-bed design.
The actual cut of nuclear power station high energy pipe leakage has diversity, as through-wall crack or the aperture that is produced by earthquake/fatigue loading/self-defect/reasons such as wall erosion, generally, nuclear power station high energy pipe leakage cut mainly occurs with the form of through-wall crack early stage.Through domestic and international a large amount of fundamental test and theoretical researches, source of leaks cut acoustic emission signal characteristic is all multifactor relevant with the material of leakage pipe, the area size/shape/roughness of leaking cut, pipeline internal medium pressure, leakage pipe wall thickness etc.As simulating true pipeline crack fully, need satisfy above-mentioned all multifactor requirements, this proposes very high request to processing, cost, cycle, and particularly may there be not exploitativeness of engineering in the simulation fully to large pipeline leakage cut.
Summary of the invention
The present invention has proposed the usability methods of nuclear power station high energy pipe leakage source cut simulation from the influence of acoustic emission detection signal, the many-sides such as cost, difficulty of processing, test/attaching/detaching workload, risk, stand utilization factor of building of stand are considered.
Technical scheme of the present invention is as follows: nuclear power station high energy line leakage test cut analogy method, can directly process under the situation of cut in the line size of simulating, directly preset cut at the test straight pipeline, by the effect of pipeline inside and outside differential pressure, the cut that medium directly presets from tube wall leaks and triggers acoustic emission signal; Be difficult to directly process under the situation of cut in the line size of simulating, tube wall at the test straight pipeline is offered the dilatation hole, at test straight pipeline outer wall the dilatation groove that surrounds described dilatation hole is set, the other end at the dilatation groove arranges leakage cut imitation specimen, effect by the pipeline inside and outside differential pressure, in the dilatation groove, the cut that presets from leakage cut imitation specimen leaks and triggers acoustic emission signal to medium then by the dilatation hole dilatation on the tube wall.
Further, aforesaid nuclear power station high energy line leakage test cut analogy method, wherein, in described test straight pipeline, the medium transport pipeline is set, the outlet of medium transport pipeline with directly be preset at test on the straight pipeline cut or offer the dilatation hole at the test straight pipeline and be connected.
Further, aforesaid nuclear power station high energy line leakage test cut analogy method, wherein, the end of described medium transport pipeline and directly be preset at test on the straight pipeline cut or between the dilatation hole that the test straight pipeline is offered, be provided with air deflector.
Further, aforesaid nuclear power station high energy line leakage test cut analogy method, wherein, the material of described dilatation groove is identical with the material of test straight pipeline; The wall thickness of dilatation groove is consistent with the wall thickness of test straight pipeline.
Further, aforesaid nuclear power station high energy line leakage test cut analogy method, wherein, the cut that presets on the described test straight pipeline or leak the cut form that presets on the cut imitation specimen and comprise: load by fatigue and preset the fatigue crack of generation, the straight line through crack that cuts out by machine work or preset run through aperture.
Beneficial effect of the present invention is as follows:
(1) the present invention proposes multiple high energy pipe leakage cut modeling scheme, solved the key issue of high energy pipe leakage cut simulation in the design of acoustic emission leakage monitoring test-bed, for the acoustic emission leakage monitoring system bench test lay a good foundation.
(2) the present invention provides multiple design proposal for the simulation of leakage monitoring test-bed source of leaks cut, the user can choose suitable scheme according to test demand and the test facilities situation of leakage monitoring system, on the basis of satisfying high energy line leakage bench test requirement, thereby the complexity that reduces high energy line leakage test-bed structure is saved construction cost, reduction of erection time; Can also improve simultaneously the service efficiency of stand facility, reduce the test loss.
(3) the present invention can simulate multi-form pipeline crack, is conducive to the research of comparing of the source of leaks that forms thus and corresponding acoustic emission signal.
Description of drawings
Fig. 1-1 is the cross-sectional view of dilatation groove scheme of the present invention;
Fig. 1-2 is the perspective view of dilatation groove scheme of the present invention;
Fig. 2-1 has the cross-sectional view of the dilatation groove scheme of medium transport pipeline for the present invention;
Fig. 2-2 has the perspective view of the dilatation groove scheme of medium transport pipeline for the present invention;
Fig. 3-1 presets the cross-sectional view of cut scheme for straight pipeline of the present invention;
Fig. 3-2 invents the cross-sectional view that the straight pipeline that has the medium transport pipeline presets the cut scheme.
Among the figure, 1. test straight pipeline 2. dilatation holes 3. dilatation grooves 4. leak cut imitation specimen 5. simulation cuts 6. medium transport pipelines 7. conical deflectors 8. simulation cuts 81,82,83. simulation cuts 61,62,63. medium transport pipelines
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
The present invention proposes the method for following several source of leaks simulations, can require to choose suitable scheme according to different high energy line leakage simulation tests.
One, dilatation groove scheme
This programme mainly is made up of dilatation hole, dilatation groove, cut imitation specimen, sees Fig. 1-1, Fig. 1-2 for details.
At test straight pipeline 1(acoustic emission leakage monitoring test-bed test pipeline) on the tube wall, open a certain size dilatation hole 2, dilatation groove 3 one ends are welded on test straight pipeline 1 outer wall, and cut imitation specimen 4 is leaked in other end welding, leak the cut imitation specimen and are provided with simulation cut 5.In test straight pipeline 1, be full of medium, medium by dilatation hole 2 dilatations on the tube wall in dilatation groove 3, medium operating mode in the dilatation groove 3 and the operating mode of testing requirements (ducted medium operating mode) should be consistent, under the effect of pipeline inside and outside differential pressure, the leakage of simulation cut and triggering acoustic emission signal that medium presets from leaking cut imitation specimen 4.
This programme is bigger for actual line size, and directly processing is leaked the enforcement of simulation cut than situation of difficult on pipeline, has avoided cutting repeatedly and the welding of pipeline simultaneously.
Two, dilatation groove+medium transport pipeline scheme
This programme mainly is made up of dilatation hole, dilatation groove, leakage cut imitation specimen and medium transport pipeline, sees Fig. 2-1, Fig. 2-2 for details.
This programme has increased medium transport pipeline 6, do not need and to charge into medium in the test straight pipeline 1, and directly test(ing) medium is transported to 2 places, dilatation hole by little pipeline, medium by dilatation hole 2 dilatations on test straight pipeline 1 tube wall in dilatation groove 3, medium operating mode in the dilatation groove 3 and the operating mode of testing requirements should be consistent, under the effect of pipeline inside and outside differential pressure, 5 leakages of simulation cut and triggering acoustic emission signal that medium presets from leaking cut imitation specimen 4.
This programme is bigger for actual line size, the temperature of medium, the higher medium of pressure, test facilities be full of high temperature in the pipeline, high-pressure medium implements than situation of difficult, this scheme has reduced the enforcement difficulty of test and potential high temperature, high-pressure medium to the risk of the injury of testing crew.
Three, straight pipeline presets the cut scheme
Shown in Fig. 3-1, this programme directly presets simulation cut 8 at test straight pipeline 1, is full of medium in test straight pipeline 1, and under the effect of pipeline inside and outside differential pressure, medium directly leaks and trigger acoustic emission signal from the simulation cut 8 that tube wall presets.
This programme is applicable to that actual line size is less, simulates the little situation of actual line size processing cut difficulty, and this scheme is simulated actual pipe leakage situation as far as possible, to reduce the influence to the acoustic emission detection signal.
Four, straight pipeline presets cut+medium transport pipeline scheme
Shown in Fig. 3-2, this programme directly presets one or more simulation cuts 81,82,83 at pipeline, then test(ing) medium is transported to tube wall cut place by medium transport pipeline 61,62,63, under the effect of pipeline inside and outside differential pressure, the simulation cut that medium directly presets from tube wall leaks and triggers acoustic emission signal.
This programme is applicable to that the actual line size processing of simulation cut difficulty is little, but the temperature of medium, the higher steam of pressure, test facilities will be full of in the pipeline high temperature, high-pressure medium implement more difficult situation, this scheme has reduced the enforcement difficulty of test and potential high temperature, high-pressure medium to the risk of the injury of testing crew.
Present embodiment adopts dilatation groove scheme, shown in Fig. 1-1, Fig. 1-2, at test straight pipeline 1(acoustic emission leakage monitoring test-bed test pipeline) on the tube wall, open a certain size dilatation hole 2, dilatation groove 3 one ends are welded on test straight pipeline 1 outer wall, cut imitation specimen 4 is leaked in other end welding, leaks the cut imitation specimen and is provided with simulation cut 5.
Dilatation hole: require the dilatation hole area big (as Φ 50mm as far as possible, concrete big I requires, tests the straight pipeline external diameter according to the cut leakage rate and determines), when guaranteeing that pipeline internal medium takes place to leak, can not cause near obviously flowing of the medium in dilatation hole, disturb to such an extent as to trigger noise signal.
The dilatation groove: dilatation groove size should be able to contain leaks cut length on the cut imitation specimen; Dilatation groove height should be considered to leak the cut imitation specimen and change number of times, and each replacing need be cut repeatedly, avoids causing and can't using, as select 150mm for use because the dilatation groove is too short; Dilatation groove material should be consistent with test straight pipeline material; The dilatation cell wall is thick should to keep consistent with test straight pipeline wall thickness; Dilatation groove structure is not done concrete limit value, as: the dilatation groove can adopt straight plate to be welded into tetragonal body and form with reference to figure 1-1, Fig. 1-2; The dilatation groove also can be selected the formations such as circular pipe with wall thickness for use.
Leak the cut imitation specimen: cut the breadboard that is complementary with the dilatation groove from nuclear power station high energy pipeline, after breadboard processes the simulation cut, be welded on the dilatation groove.Under certain test demand, can consider to adopt dull and stereotyped the replacement.
Simulation cut: mainly contain three kinds of forms:
(1) fatigue crack: carry out the fatigue loading by professional equipments such as fatigue machines and preset the generation fatigue crack.
(2) machine work crackle: by professed machine equipment such as cutting machines, cut out the straight line through crack.
(3) hole: preset by professed machines such as drilling machines and to run through aperture.
Adopt dilatation groove scheme, can conveniently carry out the replacing of cut imitation specimen.Bigger for actual line size, directly processing is leaked the enforcement of simulation cut than situation of difficult on pipeline, this scheme does not need to preset cut at pipeline, if change cut size is tested, do not need pipeline is cut repeatedly yet, reduced the enforcement difficulty of cut difficulty of processing and test.
Present embodiment adopts the scheme of dilatation groove+medium transport pipeline, and shown in Fig. 2-1, Fig. 2-2, the design of present embodiment has increased medium transport pipeline 6 with respect to 1 of embodiment, and the designing requirement of other critical pieces is constant.
The medium transport pipeline: can select for use the tubule road 6 that can satisfy high energy pipeline maximum temperature, top pressure that medium transport is located to the dilatation hole, the tubule road is connected with the conical deflector 7 (can carry out the profile change to air deflector as the case may be) of place, the inwall dilatation hole welding of test straight pipeline 1.
Adopt dilatation groove+medium transport pipeline scheme, when keeping embodiment 1 function, can reduce the supply requirement of test(ing) medium.This programme is bigger for actual line size, not only directly the enforcement of processing leakage simulation cut is difficult on pipeline, temperature, the pressure of medium are higher simultaneously, test facilities will be full of difficulty of high temperature, high-pressure medium enforcement in the pipeline, this scheme does not need to preset cut at pipeline yet, if change cut size is tested, do not need pipeline is cut repeatedly yet, reduced the enforcement difficulty of cut difficulty of processing and test and potential high temperature, high-pressure medium to the risk of the injury of testing crew.
Shown in Fig. 3-1, present embodiment directly presets simulation cut 8 at test straight pipeline 1, and the cut form can be processed with reference to embodiment 1 according to demand and be preset.
This programme is applicable to that actual line size is less, and it is little to simulate actual line size processing cut difficulty, and leaks the unique situation of cut form, and this scheme is simulated actual pipe leakage situation as far as possible, to reduce the influence to the acoustic emission detection signal.As it is more to leak simulation cut quantity, relates to that pipeline is changed or cutting, does not advise selecting for use this scheme.
Shown in Fig. 3-2, present embodiment is applicable to that the actual line size processing of simulation cut difficulty is little, but the temperature of medium, the higher steam of pressure, test facilities will be full of in the pipeline high temperature, high-pressure medium implement difficulty, leak simultaneously the cut form single, preset the few situation of cut quantity.This scheme directly presets several simulation cuts 81,82,83 at the straight pipeline inwall, each cut place test straight pipeline inwall welding conical deflector, and each conical deflector connects different medium transport pipelines 61,62,63.When a leakage simulation cut is tested, be communicated with corresponding medium transport pipeline, other pipelines cut off with valve.So not only actual pipe leakage situation be can simulate as far as possible, to reduce the influence to the acoustic emission detection signal, the enforcement difficulty of test and potential high temperature, high-pressure medium also reduced simultaneously to the risk of the injury of testing crew.
The invention solves nuclear power station high energy line leakage test-bed and leak the problem that cut is simulated, for the test of high energy line leakage is laid a good foundation, but the present invention is not limited to above-described embodiment.This invention not only can be used for acoustic emission leakage monitoring test-bed, is applicable to similar test-bed object with same demand too.Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technology thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (5)
1. nuclear power station high energy line leakage is tested the cut analogy method, it is characterized in that: can directly process under the situation of cut in the line size of simulating, directly preset cut at the test straight pipeline, by the effect of pipeline inside and outside differential pressure, the cut that medium directly presets from tube wall leaks and triggers acoustic emission signal; Be difficult to directly process under the situation of cut in the line size of simulating, tube wall at the test straight pipeline is offered the dilatation hole, at test straight pipeline outer wall the dilatation groove that surrounds described dilatation hole is set, the other end at the dilatation groove arranges leakage cut imitation specimen, effect by the pipeline inside and outside differential pressure, in the dilatation groove, the cut that presets from leakage cut imitation specimen leaks and triggers acoustic emission signal to medium then by the dilatation hole dilatation on the tube wall.
2. nuclear power station high energy line leakage as claimed in claim 1 is tested the cut analogy method, it is characterized in that: in described test straight pipeline, the medium transport pipeline is set, the outlet of medium transport pipeline with directly be preset at test on the straight pipeline cut or be connected in the dilatation hole that the test straight pipeline is offered.
3. nuclear power station high energy line leakage as claimed in claim 2 test cut analogy method is characterized in that: be provided with air deflector at the end of described medium transport pipeline with directly being preset at the cut on the test straight pipeline or testing between the dilatation hole that straight pipeline offers.
4. nuclear power station high energy line leakage as claimed in claim 1 is tested the cut analogy method, it is characterized in that: the material of described dilatation groove is identical with the material of test straight pipeline; The wall thickness of dilatation groove is consistent with the wall thickness of test straight pipeline.
5. nuclear power station high energy line leakage as claimed in claim 1 is tested the cut analogy method, it is characterized in that: the cut that presets on the described test straight pipeline or leak the cut form that presets on the cut imitation specimen and comprise: load by fatigue and preset the fatigue crack of generation, the straight line through crack that cuts out by machine work or preset run through aperture.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505131A (en) * | 2015-01-19 | 2015-04-08 | 中国核动力研究设计院 | Crevasse simulation system with two-phase discharge flow measurement function and measurement method thereof |
| CN104538067A (en) * | 2015-01-19 | 2015-04-22 | 中国核动力研究设计院 | Dismountable cleavage simulating part as well as installation method and cleavage simulation system of dismountable cleavage simulating part |
| CN104614152A (en) * | 2015-02-09 | 2015-05-13 | 中国科学院合肥物质科学研究院 | Water injection experiment device for liquid metal reactor heat exchanger rupture accident simulation and measuring device |
| CN106596272A (en) * | 2016-12-15 | 2017-04-26 | 深圳中广核工程设计有限公司 | Method and system for throwing simulation in breakage of high-energy pipelines for nuclear power plants |
| CN109973826A (en) * | 2019-04-26 | 2019-07-05 | 西安交通大学 | A kind of nuclear reactor pipe leakage rate measurement experiment device and method |
| CN110909471A (en) * | 2019-11-26 | 2020-03-24 | 中国核动力研究设计院 | Method and system for establishing nuclear reactor pressure pipeline leakage rate calculation model |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN112129766A (en) * | 2020-09-24 | 2020-12-25 | 安徽美诺福科技有限公司 | Method, device and equipment for testing reaming crack automatic identification technology and electronic equipment |
| CN112992392A (en) * | 2021-02-19 | 2021-06-18 | 哈尔滨工程大学 | Leakage test section before pressure-bearing pipeline breaks |
| CN113738888A (en) * | 2021-09-10 | 2021-12-03 | 武振兴 | Leakage-proof valve |
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| CN104538067A (en) * | 2015-01-19 | 2015-04-22 | 中国核动力研究设计院 | Dismountable cleavage simulating part as well as installation method and cleavage simulation system of dismountable cleavage simulating part |
| CN104538067B (en) * | 2015-01-19 | 2016-08-31 | 中国核动力研究设计院 | Removable cut simulating piece and installation method thereof and cut simulation system |
| CN104505131A (en) * | 2015-01-19 | 2015-04-08 | 中国核动力研究设计院 | Crevasse simulation system with two-phase discharge flow measurement function and measurement method thereof |
| CN104614152A (en) * | 2015-02-09 | 2015-05-13 | 中国科学院合肥物质科学研究院 | Water injection experiment device for liquid metal reactor heat exchanger rupture accident simulation and measuring device |
| CN104614152B (en) * | 2015-02-09 | 2017-04-19 | 中国科学院合肥物质科学研究院 | Water injection experiment device for liquid metal reactor heat exchanger rupture accident simulation and measuring device |
| CN106596272A (en) * | 2016-12-15 | 2017-04-26 | 深圳中广核工程设计有限公司 | Method and system for throwing simulation in breakage of high-energy pipelines for nuclear power plants |
| CN106596272B (en) * | 2016-12-15 | 2019-07-02 | 深圳中广核工程设计有限公司 | Nuclear power plant's high energy pipeline breaking whipping simulation system and method |
| CN109973826B (en) * | 2019-04-26 | 2020-05-15 | 西安交通大学 | Experimental device and method for measuring leakage rate of nuclear reactor pipeline |
| CN109973826A (en) * | 2019-04-26 | 2019-07-05 | 西安交通大学 | A kind of nuclear reactor pipe leakage rate measurement experiment device and method |
| CN110909471A (en) * | 2019-11-26 | 2020-03-24 | 中国核动力研究设计院 | Method and system for establishing nuclear reactor pressure pipeline leakage rate calculation model |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN112129766A (en) * | 2020-09-24 | 2020-12-25 | 安徽美诺福科技有限公司 | Method, device and equipment for testing reaming crack automatic identification technology and electronic equipment |
| CN112992392A (en) * | 2021-02-19 | 2021-06-18 | 哈尔滨工程大学 | Leakage test section before pressure-bearing pipeline breaks |
| CN112992392B (en) * | 2021-02-19 | 2022-12-09 | 哈尔滨工程大学 | Leakage test section before pressure-bearing pipeline breaks |
| CN113738888A (en) * | 2021-09-10 | 2021-12-03 | 武振兴 | Leakage-proof valve |
| CN113738888B (en) * | 2021-09-10 | 2023-08-18 | 鞍山市热工仪表阀门有限公司 | Valve for preventing leakage |
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