CN106289668A - A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack - Google Patents

A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack Download PDF

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Publication number
CN106289668A
CN106289668A CN201610959833.XA CN201610959833A CN106289668A CN 106289668 A CN106289668 A CN 106289668A CN 201610959833 A CN201610959833 A CN 201610959833A CN 106289668 A CN106289668 A CN 106289668A
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temperature
pressure
boron
crack
pipe
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CN106289668B (en
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陆永浩
孙冬柏
庄子哲雄
丁贤飞
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Beijing University of Technology
University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/222Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for tubes

Abstract

The invention belongs to damage check field, High Temperature High Pressure water environment down tube road, relate to a kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack.Described method is for the damage check in High Temperature High Pressure water environment down tube road, and described method utilizes High Temperature High Pressure pipe inner looping system to detect, and a part for described High Temperature High Pressure pipe inner looping system is tested pipeline;Boric acid solution is added in described High Temperature High Pressure pipe inner looping system;Then described tested pipeline is placed in equipped with in the high temperature and high pressure kettle of pure water, control the overpressure of described tested pipeline more than the pressure in described high temperature and high pressure kettle, boron detector is set in high temperature and high pressure kettle, judges whether described tested pipeline micro-crack occurs according to the result of detection of boron detector.The detection of easy reliable, the applicable test chamber High Temperature High Pressure solution trial pipeline micro-crack of High Temperature High Pressure waterpipe testing methods for tiny crack provided by the present invention, is also applied for engineer applied.

Description

A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack
Technical field
The invention belongs to damage check field, High Temperature High Pressure water environment down tube road, be specifically related to one and utilize boron Leak Detection The method of High Temperature High Pressure waterpipe micro-crack.
Background technology
Nuclear power is national economy and one of Major Strategic energy of society's sustainable development, flourish along with nuclear power, its Safety has become country and common people's focus of attention.
As the important component part of nuclear island, steam generator is energy exchange, connects nuclear power primary Ioops and secondary circuit pipe The critical component in road.Owing to steam generator pipe inner and outer system connects nuclear power one, secondary circuit respectively, bear High Temperature High Pressure simultaneously Burn into stress corrosion etc. under water environment, steam generator pipe easily causes etch pit, tube wall during long-time military service Thinning, even occur time serious that micro-crack, pipeline breaking cause primary Ioops medium leakage etc., very harmful to Nuclear Safety.Cause This, carry out High Temperature High Pressure water environment down tube road damage check to steam generator pipe, becomes raising nuclear power station and runs safety, dimension Protect the important channel that nuclear power station sustainability is run.
In laboratory conditions in order to study steam generator and the corrosive nature of nuclear island vitals and military service behavior, Generally by building loop, High Temperature High Pressure vapour pipe road, simulate the circuit environment of actual nuclear power station.Inside and outside wall has all contacted high temperature The tested pipeline of high-pressure water vapor contacts High Temperature High Pressure water environment in experimentation, this pipeline due to long-term by inside and outside two directions Corrosiveness can produce micro-crack, produce correlation circumstance, the corrosive nature that assessment pipeline is relevant to study micro-crack, need According to the action producing the subsequent experimental equipment such as triggering equipment autostop of crackle, thus must be to being connected with high-temperature high pressure water Steam pipeline micro-crack produces and supervises detection in real time.
Further, since actual steam generator pipeline operationally internal and external walls is in High Temperature High Pressure water environment, mesh Before, by common lossless detection method, it cannot be carried out damage inspection under nuclear power station running status, simultaneously because power station The restriction of service condition, it is also not possible to by the way of brought offline, its pipeline is carried out crack detection.Occurred by pipeline crack The Unpredictability impact of position, there is presently no a kind of effective and feasible method can be in real time to steam generator pipe fine fisssure Stricture of vagina carries out prison detection.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, Described method is by building High Temperature High Pressure pipe inner looping system, in order to simulate true circuit environment, to the pipe inner looping system built Adding boric acid solution in system, the water vapour environment outside utilizing boron detector to pipe detects, thus reaches tested high-temperature high pressure water The purpose of pipeline microcrack zone, method simple process provided by the present invention, it is suitable for engineer applied.
The present invention is achieved by the following technical solutions:
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, described method is under High Temperature High Pressure water environment The damage check of pipeline, described method builds High Temperature High Pressure pipe inner looping system first with tested pipeline, high at described high temperature Pressure pipe inner looping system adds boric acid solution;Then described tested pipeline is placed in equipped with in the high temperature and high pressure kettle of pure water, controls The overpressure making described tested pipeline is more than the pressure in described high temperature and high pressure kettle, arranges boron detection in high temperature and high pressure kettle According to the result of boron detector, device, judges whether described tested pipeline micro-crack occurs.
Further, boron detector is made up of boronate biosensor, amplifier and display, and boronate biosensor is through amplifier and shows Showing that device connects, the signal of the detection of boronate biosensor shows after amplifier amplifies on boron display.
Further, in described High Temperature High Pressure pipe inner looping system, add boric acid solution, so that returning in High Temperature High Pressure pipe The mass concentration of road system mesoboric acid solution is 0.0001-0.1%.
Further, controlling the temperature of liquid in described tested pipeline and described high temperature and high pressure kettle is 100 ~ 600 DEG C.
Further, control the pressure of liquid in described tested pipeline and described high temperature and high pressure kettle and be 5 ~ 30MPa, and control The overpressure of tested pipeline processed is more than the pressure in described high temperature and high pressure kettle.
Described High Temperature High Pressure pipe inner looping system includes cyclic water tank, filter, high-pressure pump, preheater, tested pipeline, cold Condenser, effusion meter, overvoltage protection valve and manually-operated gate;
In described High Temperature High Pressure pipe inner looping system, according to solution flow direction, set gradually cyclic water tank, filter, height Press pump, preheater, tested pipeline, condenser, overvoltage protection valve and effusion meter, and between described cyclic water tank and filter Arrange and be respectively provided with manually-operated gate between effusion meter and cyclic water tank.Wherein: cyclic water tank is the occasion of gas-liquid mixed, same Time for High Temperature High Pressure loop provide circulatory mediator;The effect of filter mainly filtration cycle water tank medium out, elimination follows Solid particle in ring water;High-pressure pump is for by the liquid pressure rise in input tested pipeline to 5 ~ 30MPa;Preheater is for by defeated Enter the liquid in tested pipeline and be warming up to 100 ~ 600 DEG C;The recirculated water that condenser flows back to through high temperature and high pressure kettle for cooling;Overvoltage Protection valve pressure in limit circuit, can be automatically when hypertonia in High Temperature High Pressure pipe inner looping less than safe pressure Open and discharge pressure;Effusion meter is recirculated water volume in measurement loop;In described High Temperature High Pressure pipe inner looping all manually Closed circuit media flow is opened and regulated to valve for diverse location in the loop.
Two solution inlet are set on the top of described cyclic water tank, are respectively used in cyclic water tank input pure water and boron Acid solution, the concentration of the boric acid in control cyclic water tank;
Also set up on described cyclic water tank three gas accesses respectively with N2Gas tank, H2Gas tank, O2Gas tank connects, and controls recirculated water Gas with various meltage in case medium;And the top of described cyclic water tank is connected with a means of deflation, the most molten for emptying The gas solved.
Further, the boron detector arranged in high temperature and high pressure kettle is connected with amplifier, and described amplifier and a boron Display connects.
Further, described method particularly as follows:
(1) utilize tested pipeline to build High Temperature High Pressure pipe inner looping system, then described tested pipeline is placed in equipped with pure water In high temperature and high pressure kettle;
(2) in described High Temperature High Pressure pipe inner looping system, pure water and trace B acid solution are injected, in described High Temperature High Pressure pipe In circuit system, the mass concentration of described boric acid solution is 0.0001-0.1%;
(3) temperature of liquid in pipe under test and high temperature and high pressure kettle is increased to 100 ~ 600 DEG C, and by high to pipe under test and high temperature Fluid pressure in pressure still increases to 5 ~ 30MPa, and in controlling pipe under test, fluid pressure is more than and the liquid in high temperature and high pressure kettle Pressure;
(4) utilize the boron detector being arranged in high temperature and high pressure kettle that boron element is detected, tie according to the detection of boron detector Fruit judges whether described tested pipeline micro-crack occurs.
The Advantageous Effects of the present invention:
(1) the High Temperature High Pressure pipe inner looping system of application in the method for the invention, it is possible to provide High Temperature High Pressure for pipe under test Environment, therefore, the method for the invention can simulate High Temperature High Pressure steam environment, to test pipeline at High Temperature High Pressure steam ring The situation producing micro-crack under border;Can be used in High Temperature High Pressure water environment down tube road microcrack zone in laboratory conditions, Can also be used to the micro-crack detection of actual power station pipeline, it is adaptable to engineer applied.
(2) the method for the invention is keeping the circulation of pipe inner looping and the high temperature and high pressure kettle of High Temperature High Pressure pipe inner looping system Detecting under conditions of operation, on tested pipeline, optional position occurs that micro-crack all can be detected, and detection method simplicity can Lean on,
(3) the inventive method can also be applied to the detection of nuclear power primary Ioops steam generator pipe Crack Damage;When using this During the steam generator pipe of the bright described method in running order high temperature and high pressure environment of detection, it is not necessary to by tested pipeline from High Temperature High Pressure water environment is taken out and utilizes the means of other Non-Destructive Testing that it is carried out off-line inspection, tested without to cut off The pipe inner looping that pipeline connects, can directly detect being in the pipeline that high temperature is higher than under environment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention utilizes the method for boron Leak Detection High Temperature High Pressure waterpipe micro-crack;
Reference: 1. cyclic water tank;2. filter;3. high-pressure pump;4. preheater;5. tested pipeline;6. high temperature and high pressure kettle; 7. boronate biosensor;8. amplifier;9. boron display;10. condenser;11. overvoltage protection valves;12. effusion meters;13. venting dresses Put;14.N2Gas tank;15.H2Gas tank;16.O2Gas tank;17 first manual valves;18. second-hand's movable valves;19. the 3rd hand-operated valves Door;20. the 4th manually-operated gates;21. the 5th manually-operated gates.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right The present invention is explained in further detail.Should be appreciated that specific embodiment described herein is used only for explaining the present invention, and It is not used in the restriction present invention.
On the contrary, the present invention contain any be defined by the claims the replacement done in the spirit and scope of the present invention, repair Change, equivalent method and scheme.Further, in order to make the public that the present invention to be had a better understanding, thin to the present invention below During joint describes, detailed describe some specific detail sections.There is no these detail sections for a person skilled in the art Description can also understand the present invention completely.
Embodiment 1
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, utilizes the tested pipeline that this method is to be detected For being applied to the steam generator pipe before the installation of nuclear power station, or need to carry out under high temperature and high pressure environment to detect other Pipeline, described method particularly as follows:
(1) utilize tested pipeline to build High Temperature High Pressure pipe inner looping system, then described tested pipeline is placed in equipped with 300L pure In the high temperature and high pressure kettle of water;
As it is shown in figure 1, described High Temperature High Pressure pipe inner looping system include cyclic water tank 1, filter 2, high-pressure pump 3, preheater 4, Tested pipeline 5, condenser 10, effusion meter 12, overvoltage protection valve 11, first manual valve 17, second-hand's movable valve the 18, the 3rd Manually-operated gate the 19, the 4th manually-operated gate 20 and the 5th manually-operated gate 21.
In described High Temperature High Pressure pipe inner looping system, according to solution flow direction, set gradually cyclic water tank 1, filter Device 2, high-pressure pump 3, preheater 4, tested pipeline 5, condenser 10, overvoltage protection valve 11 and effusion meter 12, and in described circulation Arrange between water tank 1 and filter 2 that to arrange the 5th between the 4th manually-operated gate 20, and effusion meter 12 and cyclic water tank 1 manual Valve 21.Wherein: cyclic water tank 1 is the occasion of gas-liquid mixed, provide circulatory mediator for High Temperature High Pressure loop simultaneously;Filter 2 Effect mainly filtration cycle water tank 1 medium out, eliminate the solid particle in recirculated water;High-pressure pump 3 will be for inputting Liquid pressure rise in tested pipeline 5 is to 5 ~ 30MPa;Preheater 4 for the liquid in input tested pipeline 5 being warming up to 100 ~ 600℃;The recirculated water that condenser 10 flows back to through high temperature and high pressure kettle 6 for cooling;It is high that overvoltage protection valve 11 is used for limiting high temperature Pressure in pressure pipe inner looping is less than safe pressure, can automatically open up and discharge when hypertonia in High Temperature High Pressure pipe inner looping Pressure;Effusion meter 12 is used for measuring recirculated water volume in High Temperature High Pressure pipe inner looping;Described High Temperature High Pressure pipe inner looping also wraps Include the first manual valve 17 of the flow for controlling pure water inflow cyclic water tank 1, for controlling boric acid solution inflow recirculated water Second-hand's movable valve 18 of case 1 flow and be positioned at the 3rd manually-operated gate 19 bottom described cyclic water tank 1.
Open and regulate closed circuit media flow for diverse location in the loop;
(2) in described High Temperature High Pressure pipe inner looping system, 300L pure water and trace B acid solution are injected, in described High Temperature High Pressure In pipe inner looping system, the mass concentration of described boric acid solution is 0.005%;
(3) temperature of liquid of pipe under test is increased to 350 DEG C, the temperature of liquid in high temperature and high pressure kettle is increased to 350 DEG C; And the fluid pressure of pipe under test is increased to 20MPa, the fluid pressure in high temperature and high pressure kettle is increased to 15MPa;And keep The fluid pressure of pipe under test is than the big 5MPa of pure water pressure in high temperature and high pressure kettle;
(4) utilize the boron detector that is arranged in high temperature and high pressure kettle that boron element is detected, if can detect boron element and its Content in high temperature and high pressure kettle is gradually increased, and illustrates that measured pipeline has micro-crack;If can't detect boron element, then quilt is described Measurement pipeline is non-microcracked.
Embodiment 2
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, utilizes the tested pipeline that this method is to be detected For being applied to the steam generator pipe before the installation of nuclear power station, or need to carry out under high temperature and high pressure environment to detect other Pipeline.
Build High Temperature High Pressure pipe inner looping system, tested pipeline is placed in the high temperature and high pressure kettle equipped with 500L pure water, and Boron element detector is installed in pipe external loop, in pipe inner looping, injects the water of 500L, return in boric acid is joined pipe simultaneously Lu Zhong, makes the mass concentration of pipe inner looping mesoboric acid solution reach 0.1%, the most respectively to pipe inner looping temperature-pressure to 350 DEG C/25MPa, to pipe external loop temperature-pressure to 350 DEG C/22MPa, and keep overpressure than pure water pressure in high temperature and high pressure kettle Big 3MPa.In high temperature and high pressure kettle, the content of boron element is detected, if boron element can be detected and it is at height with boron element detector Content in temperature autoclave is gradually increased the measured pipeline of explanation micro-crack.
Embodiment 3
In actual nuclear power station secondary loop (high temperature and high pressure kettle quite and in embodiment 1), boron element detector is installed, measures also The mass concentration of confirmation one loop of nuclear power station (quite with the High Temperature High Pressure pipe inner looping system in embodiment 1) mesoboric acid solution is 0.06%, keep the most respectively the temperature of water vapour and pressure in one loop of nuclear power station and secondary circuit be respectively 310 DEG C/20MPa with 310 DEG C/15MPa, and keep the primary Ioops pressure ratio big 5MPa of secondary circuit pressure.In view of nuclear power primary Ioops needing by adding boron Acid, to regulate reactivity, does not has this kind of material in secondary circuit medium simultaneously;With boron element detector in high temperature and high pressure environment The content of boron element in detection secondary circuit, if it is tested to detect that boron element and its content in secondary circuit are gradually increased explanation There is micro-crack in buret road.

Claims (7)

1. the method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, it is characterised in that described method is for height The damage check in temperature water under high pressure environment down tube road, described method utilizes High Temperature High Pressure pipe inner looping system to detect, described height A part for temperature high-voltage tube inner looping system is tested pipeline;Boric acid is added molten in described High Temperature High Pressure pipe inner looping system Liquid;Then being placed in described tested pipeline equipped with in the high temperature and high pressure kettle of pure water, the overpressure controlling described tested pipeline is big Pressure in described high temperature and high pressure kettle, arranges boron detector in high temperature and high pressure kettle, sentences according to the result of detection of boron detector Whether disconnected described tested pipeline there is micro-crack.
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, its feature exists In, in described High Temperature High Pressure pipe inner looping system, add boric acid solution, so that High Temperature High Pressure pipe inner looping system mesoboric acid is molten The mass concentration of liquid is 0.0001-0.1%.
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, its feature exists In, controlling the temperature of liquid in described tested pipeline and described high temperature and high pressure kettle is 100 ~ 600 DEG C.
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, its feature exists In, control the pressure of liquid in described tested pipeline and described high temperature and high pressure kettle and be 5 ~ 30MPa, and control the pipe of tested pipeline Interior pressure is more than the pressure in described high temperature and high pressure kettle.
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, its feature exists In, described High Temperature High Pressure pipe inner looping system also includes high-pressure pump, preheater;Described high-pressure pump will be for inputting in tested pipeline Liquid pressure rise to 5 ~ 30MPa, described preheater is for being warming up to 100 ~ 600 DEG C by the liquid in input tested pipeline.
A kind of method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack, its feature exists In, high temperature and high pressure kettle arranges boron detector, described boron detector is made up of boronate biosensor, amplifier and display, and boron passes The boron detection amplified device of information that sensor obtains shows after amplifying over the display.
7. according to a kind of described method utilizing boron Leak Detection High Temperature High Pressure waterpipe micro-crack of one of claim 1-6, its Be characterised by, described method particularly as follows:
(1) utilize tested pipeline to build High Temperature High Pressure pipe inner looping system, then described tested pipeline is placed in equipped with pure water In high temperature and high pressure kettle;
(2) in described High Temperature High Pressure pipe inner looping system, pure water and trace B acid solution are injected, in described High Temperature High Pressure pipe In circuit system, the mass concentration of described boric acid solution is 0.0001-0.1%;
(3) temperature of liquid in pipe under test and high temperature and high pressure kettle is increased to 100 ~ 600 DEG C, and by high to pipe under test and high temperature Fluid pressure in pressure still increases to 5 ~ 30MPa, and in controlling pipe under test, fluid pressure is more than and the liquid in high temperature and high pressure kettle Pressure;
(4) utilize the boron detector being arranged in high temperature and high pressure kettle that boron element is detected, tie according to the detection of boron detector Fruit judges whether described tested pipeline micro-crack occurs.
CN201610959833.XA 2016-10-27 2016-10-27 A method of utilizing boron leak detection high temperature and pressure waterpipe micro-crack Active CN106289668B (en)

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CN109060265A (en) * 2018-06-28 2018-12-21 芜湖泰和管业股份有限公司 A kind of gas bellows air-tightness detection device and its detection method
CN111128417A (en) * 2020-01-14 2020-05-08 长沙理工大学 Method for diagnosing leakage of steam generator of nuclear power plant

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CN111128417A (en) * 2020-01-14 2020-05-08 长沙理工大学 Method for diagnosing leakage of steam generator of nuclear power plant

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