CN107004448B - Device and method for implementing tightness detection to fuel rod box - Google Patents
Device and method for implementing tightness detection to fuel rod box Download PDFInfo
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- CN107004448B CN107004448B CN201580068240.8A CN201580068240A CN107004448B CN 107004448 B CN107004448 B CN 107004448B CN 201580068240 A CN201580068240 A CN 201580068240A CN 107004448 B CN107004448 B CN 107004448B
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- fuel rod
- test container
- rod box
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- 239000000446 fuel Substances 0.000 title claims abstract description 102
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000007789 gas Substances 0.000 claims description 142
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 42
- 238000011010 flushing procedure Methods 0.000 claims description 38
- 229910052786 argon Inorganic materials 0.000 claims description 21
- 230000001105 regulatory Effects 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000875 corresponding Effects 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000003068 static Effects 0.000 claims 2
- 238000004080 punching Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 230000001172 regenerating Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 230000002706 hydrostatic Effects 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium(0) Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 230000001809 detectable Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000023298 conjugation with cellular fusion Effects 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000001819 mass spectrum Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000009376 nuclear reprocessing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000000576 supplementary Effects 0.000 description 1
- 230000021037 unidirectional conjugation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Device (1) for implementing tightness detection to the fuel rod box (3) comprising at least one fuel rod (2) and test gas (P) includes the test container (4) being configured to for accommodating at least one fuel rod box (3), which can sink in the water-filled pond (5) of nuclear facility.According to the present invention, mass spectrograph (14) can fluidly connect as follows with the inside of test container (4), so that the concentration that air-flow is used to detect the test gas (P) being diffused into test container (4) from fuel rod box (3) can be supplied to mass spectrograph (14).
Description
The present invention relates to a kind of for implementing tightness to the fuel rod box comprising at least one fuel rod and test gas
The device of detection comprising be configured to the test container for accommodating at least one fuel rod box, which can sink to
In the water-filled pond of nuclear facility.Moreover, it relates to it is a kind of using this device to including at least one fuel
The method that the fuel rod box of stick and test gas implements tightness detection.
It is known that the fuel rod of nuclear reactor may be leakproofness difference at runtime, i.e., water may penetrate into it
In.Once identifying that fuel rod has this defect, then usually it is encapsulated in fuel rod box under water, to prevent radioactivity from splitting
Object, especially radgas is sold of one's property to escape.Here, being encapsulated in enough depth for fuel rod carries out, so that fuel rod box
Opening and closing remotely control by suitable executor to realize.It opens fuel rod box and introduces after fuel rod, penetrate into
The test gas that water in fuel rod box is blasted squeezes out, and fuel rod box is sent in packaging system.It is filled in the encapsulation
In setting, the fuel rod in fuel rod box is heated by flowing through fuel rod box with the test gas of heat, to make fuel rod
In water evaporation.It is removed in packaging system by baking test gas or with the moist gas of dry test gas replacement
After water vapour, fuel rod box is closed and is soldered in detent position.By fuel rod box that is having welded and thereby having sealed
It also needs to detect its degree of being sealed after removing from packaging system.Furthermore if it is necessary, being transported to finally by fuel rod box
Before disposing library or reprocessing facility, the fuel rod box for accommodating fuel rod is temporarily stored in the storage pool for being marked with water.
It is well known that checking the tightness of fuel rod itself or checking the close of the fuel rod box comprising at least one fuel rod
Feng Du.
Such as a kind of known method for being detected to fuel rod degree of being sealed from 195 42 330 A1 of DE, wherein
The content of the gaseous fission product of escaping gas from fuel element is analyzed.
WO 2007/071337 describes the detection to the fuel rod box comprising at least one fuel rod.Fuel rod box is drawn
Into in test container, which is located at underwater in the pond of nuclear facility being filled.By Underwater Camera
It is leaked to detect, wherein estimating slip by the quantity and size of detected bubble.
From the prior art, task of the invention lies in implement tightness detection to fuel rod box to be changed as follows
Into causing particularly precisely determine slip.
In terms of device, the task is by the aforementioned type of the further feature with Patent right requirement 1 for real
The device for applying tightness detection is achieved.
Advantageous form of implementation of the invention is the theme of dependent claims.
Include for implementing the device that tightness detects to the fuel rod box comprising at least one fuel rod and test gas
It is configured for accommodating the test container of at least one fuel rod box, which can sink to the water-filled of nuclear facilities
Chi Zhong.According to the present invention, mass spectrograph can be connect with the internal flow of test container, so that air-flow can be supplied to mass spectrograph for examining
Survey the concentration for the test gas being diffused into test container from fuel rod box.
Therefore, the whole process of tightness detection can also be implemented as the encapsulation process of fuel rod under water.For this purpose, surveying
Examination container is sunk in pond by under, such as is sunk to by under in the storage pool of nuclear power plant.In addition to comprising at least one fuel rod, fuel rod
Box also includes the test gas under known predetermined pressure.Test gas passes through the leakage that is likely to be present in fuel rod box
Place is diffused into test container inside.The inside of test container passes through pipeline and the valve and mass spectrograph phase that are disposed there between when necessary
Even, so that test gas can be supplied to mass spectrograph after foundation fluidly connects.Selectivity detection examination is carried out by mass spectrograph
It tests gas and is able to achieve the concentration for particularly precisely determining test gas contained in air-flow.Therefore, by test gas with this
The slip that the concentration that mode determines is inferred to has the accuracy improved.
It carries out being detected according to the tightness of regular industrial standard as test gas usually using helium.But in this application
In the case of use argon gas to be unlike this proved to be particularly advantageous as test gas.It is therefore preferable that mass spectrograph is constructed
At the concentration for detecting the argon gas diffused out from fuel rod box.Fuel rod is enclosed in it in fuel rod box under water
Afterwards, it does not exclude still to retain certain residual moisture in fuel rod box.This is equally applicable to test container itself, usually exists
By the water submerged in pond when introducing fuel rod box.Therefore, before examining leakproofness, inside fuel rod box or test container may
It is endless white drying.Particularly, if to detect the concentration of the helium therefrom diffused out by mass spectrography, this can have very much
Problem, because helium has similar atomic mass with the hydrogen in residual moisture.Therefore, if using helium as test
Gas, then measurement result has bigger inaccuracy.If having obviously in fuel rod box to be filled under the pressure of definition
Different from hydrogen atomic mass argon gas as test gas, then avoiding the problem through this.
Alternatively, other inert gases also can be used as test gas.
In a preferred embodiment, test container can be configured to (evakuierbar) that can be vented as follows, so that
In test container inside, relative to hydrostatic pressure caused by the water as test container surrounding reduced internal pressure be can
It adjusts.In other words, the inside of test container can especially through valve arrange or in a similar way with the Hydrostatic of environment
Pressure isolation is examined so that can for example adjust the internal pressure in the inside of test container to suitable tightness by vacuum pump
The value of survey.This be it is desired particular for the boundary condition of specified definition when determining slip, wherein fuel rod box is interior
Pressure difference between portion and the inside of test container must be known.The pressure of inside relative to fuel rod box, suitably reduces
Internal pressure ancillary test gas in test container is diffused out from fuel rod box, thus when test process being made to occupy less
Between.
Preferably, test container has the connection equipment for the inside for leading to pond in its lower end.The connection equipment is used as depositing
The outlet that water therein is penetrated into when introducing at least one fuel rod box being in test container.For this purpose, being specifically arranged to
Flushing gas (Sp ü lgas) under pressure is introduced to the inside of test container, which, which is expelled from water, comes and incite somebody to action
Its by be arranged in test container minimum point connection equipment exhausting into pond.For this purpose, flushing gas is defeated to test container
Sending can be for example achieved by vacuum pump with corresponding transmission power.Especially using reality of the argon gas as test gas
It applies in example, the water of emptying test container as much as possible is desired.Argon gas has relatively good water solubility, so that test
Remaining remaining water can influence significantly test result and be distorted test result significantly in container.
It is particularly preferred that the upper end of test container can be fluidly connected with the first reservoir, flushing gas can be in certain pressure
Under be stored in first reservoir.Flushing gas is under so big pressure in the first reservoir, so that the survey filled by water
Examination container can be rinsed completely gas and be full of, and mode is for example to be provided between the first reservoir and test container by opening valve
It fluidly connects.It it is necessary to thus, the pressure in the first reservoir is greater than the hydrostatic pressure generated by the water of test container surrounding
Power.Flushing gas is conveyed due to avoiding the conveying equipment of use and maintenance heavy workload, especially vacuum pump, so such structure
The device made has extremely simple and firm structure type.
Preferably, the first reservoir can be fluidly connected with mass spectrometric sample point.Therefore, allow with flushing gas rinse and such as
It is necessary to dry to direct flow into mass spectrometric pipeline.
The second reservoir is provided in improved form of the invention, test gas can be stored under stress wherein.Second storage
Device can also be fluidly connected for example via valve position appropriate (Ventilstellung) with sample point.In this case with school
It is realized for the purpose of quasi- mass spectrograph to the supply of sample point.Test gas is stored in the second reservoir and controllable under known pressure
It is supplied to system sample point, so that mass spectrometric calibration is realized under conditions of definition.Test gas contains with a small amount of ratio
Test gas flushing gas.In this case, the concentration of test gas contained in flushing gas is slightly above mass spectrum
The detectable limit of instrument is calibrated so that mass spectrograph can supply test gas by with controlling.
Preferably, at least one volume tune between sample point and the first reservoir and/or between sample point and the second reservoir
Valve is saved, to adjust flushing gas or to test the volume flow of gas.It is adjusted by least one volume for testing gas
Valve can be changed volume flow and can adjust volume flow to certain numerical value, so that it is guaranteed that mass spectrometric accurate calibration.
In addition, the connection equipment that test container lower end is arranged in is can be also used in a preferred embodiment with the water in pond
With controlling floods test container.In the present embodiment, the inside of test container is in upper end for example by valve arrangement or similar cloth
It sets and is fluidly connected with mass spectrometric sample point, thus by the way that water guidance to be present in test container by connection equipment to realize
Air column to sample point conveying.It therefore, can be using the hydrostatic pressure of the water of surrounding, to deposit according to this form of implementation
It is that in test container and when having at leakage the air column containing test gas virtually completely supplies as follows
To mass spectrograph, i.e. water submerged test container in controlling pond.
In the particular embodiment, the connection equipment for flooding test container for controlling has air regenerating device.This is changed
Gas equipment includes internal container, and second container tips upside down on the internal container.There is the possibility in pond to contain in internal container
Between or dissolution argon gas water.When with flushing gas, especially nitrogen purge test container, flushing gas is blasted internal container
In, the gas exchanges that are achieved in water.The argon gas of the especially overwhelming majority can be replaced by nitrogen in this case.Pass through
Flushing gas, which is blasted internal container, makes the second container for being looped around surrounding be rinsed gas charge.As a result, passing through outside
Container exist separated with the tight formula in the pond for being looped around surrounding.The capacity of the first container and second container can as follows really
Fixed, i.e., during the water being located in internal container flows back into the process of test container (measuring phases), in test container water
Before position reaches the level of pool water level, no water penetrates into internal container via external container from pond.This is using argon gas
When as test gas particularly advantageous, reason is that the argon gas dissolved can be and always exists in water.
Preferably, can change by control equipment, such as by least another volume regulating valve or vacuum pump, especially
It is to control or regulate the volume flow supplied to the air-flow of mass spectrometric sample point.For this purpose, the sampling on sample point preferably exists
It is carried out under constant pressure, to avoid measurement result is distorted.Can correspondingly it change to control or regulate the pressure at sample point
Become the pump power of vacuum pump and/or the channel of volume regulating valve.
It is particularly preferred that control equipment, especially other volume regulating valves or vacuum pump are pressed at sample point with for measuring
The pressure sensor of power connects.
According to possible embodiment, test container is configured for accommodating only single fuel rod box.Alternative
The size for determining test container in embodiment as follows, makes it possible to accommodate multiple fuel rod boxes.
Preferably, at least one fuel rod box can be introduced into test container via the closed opening for being arranged in end side
In.Threaded connection can be used to close fuel rod box, but generally also using the welding of particularly material mating.
In order to be accurately determined slip, learn that other state parameters, especially temperature are expectations as precisely as possible
's.It is therefore preferable that temperature sensor is arranged in the various parts of device to detect temperature.
Possible form of implementation according to the present invention, the device include the component arranged in underwater pond, are especially managed
Road and/or pipeline segment (Leitungsabschnitte), and the component being arranged in outside pond.Due to the decay hot merit of fuel
Rate is mainly temperature that is slightly elevated and being almost constant at about 30 DEG C to 40 DEG C in pond.Therefore, it is arranged in the portion outside pond
Since colder ambient enviroment usually has lower temperature, which promotees supplying air-flow to during sample point part
Make condensation.But such condensation may be such that measurement result is distorted.It is therefore preferred in the overall range of device
It is stationary temperature as far as possible.In order to ensure this point, at least partly it is equipped with to the component of device being arranged in outside pond heat-insulated
Insulation.
Heating equipment is set in improved form of the invention, can be at least partially heated and be arranged in by the heating equipment
Component outside pond.Thus the temperature gradient of generation is reduced, at least to prevent the condensation in the especially region of sample point.It is preferred that
Ground, the temperature at sample point can be adjusted to the temperature in pond by heating equipment.
In terms of method, the task is by the aforementioned types of the supplementary features with Patent right requirement 15 for implementing
The method of tightness detection is achieved.
In the method for implementing tightness detection to the fuel rod box comprising at least one fuel rod and test gas
Using one of above-mentioned apparatus, thus referring initially to previous form of implementation.
For degree of being sealed detection, the introduction of at least one fuel rod box has been sunk in the pond of nuclear facilities being filled
Test container in.According to the present invention, contain the test gas being diffused into test container from fuel rod box to mass spectrograph supply
Air-flow.In addition, being diffused into the dense of the test gas in test container by the slave fuel rod box of mass spectrograph detection in the gas flow
Degree is to determine slip.
It is specifically arranged to that slip is determined indirectly thus.In order to prove the slip without departing from permission, the examination detected
The concentration of gas is tested after previously determined measurement period (test gas is discharged into the duration in test container) terminates
Scheduled threshold value must be lower than, wherein must assure that the concentration of test gas to be measured is higher than mass spectrometric detectable limit.
In the case where using argon gas as test gas, mass spectrometric detectable limit generally between 10ppb (1,000,000,000/
It is several) and 1ppm (a few millionths) between.
Preferably, at least one fuel rod box is introduced under water in test container and is penetrated into flushing gas displacement
Water in test container.The flushing gas under pressure is introduced into test container thus.
Preferably, to mass spectrograph supply the air-flow containing flushing gas and the test gas diffused out from fuel rod box it
Before, flushing gas is retained in test container within the period that can be given.It is given include the pressure in single component and
In the boundary condition of temperature, slip and the combustion according to the tightness of fuel rod box to detecting can be determined from the concentration detected
Charge bar box is classified.
In the especially preferred embodiments, with the water submerged test container in pond to generate air-flow.It can especially give
With controlling floods test container after the fixed period expires, to supply the air-flow containing test gas to sample point.
Preferably, the air-flow supplied to mass spectrometric sample point proceeds as follows adjusting in terms of its volume, so that
It is constant pressure at sample point.
In a preferred embodiment, the predetermined mix containing test gas and flushing gas is supplied to sample point with controlling
The admixture of gas of ratio.The admixture of gas for supplying predetermined mix ratio can be implemented before mass spectrograph operation to calibrate
Mass spectrograph.
Preferably, it is arranged in the component of the device outside pond, especially pipeline and/or line segments, during operation by least
Partly heat.It is possible thereby to prevent to occur it is sizable, promote the temperature gradient condensed in air-flow.
Inert gas can be used as test gas.It is particularly preferred that using argon gas as test gas.If will combustion
Charge bar is encapsulated into fuel rod box and carries out in the same pond of nuclear facility, then the different places being arranged in pond implement envelope
Dress and tightness detection.The reason is that argon gas has relatively good water solubility.Therefore, being retained in test container, contain
The residual moisture of argon gas may be such that measurement result is distorted.By making to include separating on encapsulation and the process space of tightness detection
The influence is set at least to be minimised degree.
Preferably, the water in test container is completely removed as far as possible.This can for example be made by using the nitrogen of high-quality
It is realized for flushing gas.
Below with reference to the accompanying drawings possible embodiment of the invention is illustrated in more detail.It is shown in figure:
Fig. 1 show first embodiment according to the present invention for comprising at least one fuel rod and test gas
Fuel rod box implements the device of tightness detection,
Fig. 2 shows second embodiment according to the present invention for comprising at least one fuel rod and test gas
Fuel rod box implements the device of tightness detection.
Mutual corresponding component is designated by like reference numerals throughout in all figures.
Fig. 1 show first embodiment according to the present invention for comprising at least one fuel rod 2 and test gas P
Fuel rod box 3 implement tightness detection device 1 schematic structure.
In the illustrated embodiment, fuel rod box 3 is filled with argon gas as test gas P.Inside pressure in fuel rod box 3
Power is about 2.5 to 3.5bar.
Fuel rod box 3 is placed in the test container 4 in the pond of nuclear facility 5.Pond 5 is filled and is tested by water
The underwater that container 4 is sunk down into pond 5.
Test container 4 has closeable opening 6 in end side, and fuel rod box 3 can be introduced by the opening positioned at water
Under test container 4 in.First for measuring the temperature in test container 4 is arranged in the region of closeable opening 6
Temperature sensor 7.
Connection equipment 8 is arranged on the lower end of test container 4, which provides the connection to the inside in pond.In Fig. 1
Shown in embodiment, connection equipment 8 includes valve 9 and air regenerating device 10.The connection equipment 8 for leading to the inside in pond 5 be used to seep
Penetrate into the outlet of the water in test container 4.In addition, connection equipment 8 is also able to achieve and floods test with the water management in pond 5
Container 4, so that the air column that will be located in test container 4 is defeated via the direction of pipeline 11,12 towards the sample point 13 of mass spectrograph 14
It send.
Device 1 has the component being arranged in outside pond 5 for distributing to analytical unit 15.The component for distributing to analytical unit 15 is special
It does not include a part and pipeline 12,16,17,18 of pipeline 11.In addition, analytical unit 15 further include pressure sensor 19,20,
Valve 21,22,23,24, volume regulating valve 25,26,27, sample point 13 and mass spectrograph 14.The component of analytical unit 15 be equipped with every
Thermal insulation 28, for especially preventing the condensation when implementing tightness detection in air-flow.Second temperature sensor 29 is configured to
For testing and analyzing the temperature in unit 15.
It is arranged in and leads to the volume regulating valve 25 of the inlet of sample point 13 and be connected with pressure measurement sensor 20 (with dotted line
It is shown).The pressure at sample point can be controlled by volume regulating valve 25 and pressure measurement sensor 20, and especially adjust and take
Pressure at sampling point, so that air-flow is supplied to mass spectrograph 14 under substantially constant pressure and is achieved.
It is stored with flushing gas under stress in first reservoir 30, is in the shown embodiment nitrogen.Another second storage
Device 31 includes test gas under stress, is nitrogen in embodiment shown here, the conduct examination with a small amount of ratio
Test the argon gas of gas P.Flushing gas or test gas can be supplied to sample point 13 via pipeline 12,17,18, especially for rushing
It washes or calibrating mass spectrometry 14.For this purpose, flushing gas can be adjusted by volume regulating valve 22,23 and test the volume flow of gas
Amount.
Method for implementing tightness detection to fuel rod box 3 is carried out using Fig. 1 shown device 1,
Process is as follows:
Firstly, all valves 9,21,22,23,24 are closed, and air regenerating device 10 is filled with water.Then by test container 4
End-side openings 6 open, and under water will fuel rod box 3 introduce test container 4 in.After this again by test container 4
Opening 6 closes and removes the water penetrated into test container 4 as much as possible.This is by opening valve 9,21 and feed-in comes from
The flushing gas of first reservoir 30 is realized.Therefore, the water in test container 4 is supplanted and via connection equipment 8
It is discharged into pond.Test container 4 is soaked on the inside of water in order to be substantially reduced, and test container 4 is fully rinsed with flushing gas.It is surplus
Remaining flushing gas is via connection 8 separating device 1 of equipment.Flushing gas is introduced to the aqueous inside of air regenerating device 10 when flushing
In the first container.The gas exchanges for the gas being dissolved in water are realized in this case.Therefore particularly, the argon gas quilt of dissolution
Nitrogen replacement.In addition, when rinsing at least partially with the second of the encirclement the first container of flushing gas filling air regenerating device 10
Container.Here, the first container and second container of air regenerating device 10 are designed to make when flooding test container 4, without water
Test container is flowed into from pond 5.
It is then switched off valve 9,21.Retain Gas receiver (Gasvorlage) in the dome area of air regenerating device 10, the gas
Body receiver prevents the water in pond 5 from overflowing.Water in air regenerating device 10 is substantially free of air and/or argon gas.Valve 24 is beaten
After opening, the internal pressure in test container 4 reduces.In embodiment shown here, internal pressure is set to about 1bar.At this
It is again switched off valve 24 later.
In order to cause the concentration of the test gas P in test container 4 to increase, supplied in the air column that will be located in test container 4
Before to mass spectrograph 14 to analyze, the period that can be given is waited, is waited 1 hour in this exemplary embodiment.?
During time period, valve 22 is opened and with flushing gas flushing pipeline 12 so that without air can from the outside through by
The end side outlet 32 of pipeline 12 is penetrated into.
The volume regulating valve 22 at flushing gas supply is arranged in adjust as follows, it can lead to via being arranged in
The volume regulating valve 25 of the inlet of sample point 13 is adjusted to realize.Particularly, air-flow is adjusted in this way, so that in matter
During spectrometer 14 is run, it is maintained at by the pressure that pressure sensor 20 measures in nearly constant level.
It is can giving, be mainly used in test container 4 accumulate test gas P period during, be preferably realized matter
The calibration of spectrometer 14.For this purpose, being first turned on valve 23 before closing valve 22.Then sample point 13 and test gas P be under stress
The second reservoir 31 therein is stored in fluidly connect.In this case so adjust volume regulating valve 23, allow to by
Another volume regulating valve 25 is adjusted, so that the pressure of somewhat constant be made to act at sample point 13.
After mass spectrograph 13 is calibrated, before closing valve 23, it is again turned on valve 22 first.After predetermined time period is expired
It opens valve 9,24 and closes valve 22, to allow the water in pond 5 to flow into test container 4 via air regenerating device 10.Due to Hydrostatic
Pressure, water flow into test container 4 and are located at the air column in test container 4 towards the conveying of the direction of sample point 13.Mass spectrograph 14 is examined
The concentration for surveying the test gas P in air-flow, is here the concentration of argon gas.Herein it is noted that the inertia of measuring system, i.e., the smallest
Time of measuring.Here, volume flow is so adjusted, so that there are constant pressure at sample point 13.By the concentration detected
Involve measured pressure and temperature to calculate slip.
After the measurement, it is again switched off valve 24, open test container 4 and takes out fuel rod box 3 again.
Fig. 2 shows the devices 1 detected for implementing tightness for second embodiment according to the present invention.Shown reality
The working principle for applying example corresponds essentially to the device of first embodiment, so that referring initially to description related to this.
Embodiment shown in Fig. 2 has for supplying air-flow to the vacuum pump 42 of mass spectrograph 14.In addition, being also provided with valve
33,34,43, ball valve is configured to for providing fluidly connecting between pipeline 11,12,35,36,37,40,41,43.
For implement tightness detection method be using second embodiment device shown in Fig. 21 in the case where into
Row, process are as follows:
Fuel rod box 3 is introduced in test container 4 by the opening 6 of end side first.For this purpose, will be configured to the valve 33 of ball valve
It is opened up in the side of test container 4.Valve 9 is also opened up in flow direction side.The fuel rod box 3 being introduced into the in test container 4
Extend to slightly below valve 33.
Then, the water penetrated into test container 4 when putting into fuel rod box 3 is discharged from test container 4.For this purpose, first
Valve 33 is closed, valve 9 is opened.Reservoir of the connection comprising the flushing gas under pressure, especially storage cylinder on entrance 38.Valve
34 are so adjusted, so that pipeline 35 and pipeline 12 are fluidly coupled to each other.After this by blasting flushing gas, especially nitrogen
Water is discharged in pond 5 from test container 4 via connection equipment 8 by gas.Then pipe 35 via pipeline 37 and passes through the commutation of valve 34
It is fluidly connected with pipeline 35.Pipeline 34,36 is dried only also by flushing gas is blasted.When test container 4 or pipeline 34,35,
36,37 only containing a small amount of remaining water when, close valve 9.
In order to generate negative pressure in test container 4, regulating valve 34 as follows first, so that between pipeline 11,12
Offer fluidly connects.Correspondingly such regulating valve 39, so that realizing the connection of pipeline 40,41.Then vacuum pump 42 is run.It is firing
After pressure difference needed between the inside of charge bar box 3 and the inside of test container 4 reaches, stop exhaust, and valve 39 is converted
At fluidly connecting pipeline 40,43 mutually.
Even if vacuum pump 42 continues to run after reaching negative pressure required in test container 4, to have test
The flushing gas of the ratio for the test gas that the possibility of container 4 is released constantly is delivered to mass spectrograph 14 and is transmitted back to again
Come.Ratio by mass spectrograph 14 with regard to contained test gas analyzes the air-flow of conveying.Then by measured dense
Degree and test period consider remaining state variable to determine slip.
Hereinbefore with reference to preferred embodiment, invention has been described.It is, however, evident that the present invention not office
It is limited to the specific form of implementation of illustrated embodiment, more precisely, related technical staff can be inferred to become by the description
Type, without departing from the main basic thought of the present invention.
List of reference signs
1 device, 23 valve
2 fuel rod, 24 valve
3 fuel rod box, 25 volume regulating valve
4 test container, 26 volume regulating valve
5 pond, 27 volume regulating valve
6 opening, 28 insulation
7 temperature sensor, 29 temperature sensor
8 connection 30 reservoirs of equipment
9 valve, 31 reservoir
The outlet of 10 air regenerating devices 32
11 pipeline, 33 valve
12 pipeline, 34 valve
13 sample point, 35 pipeline
14 mass spectrograph, 36 pipeline
15 analytical unit, 37 pipeline
16 pipeline, 38 entrance
17 pipeline, 39 valve
18 pipeline, 40 pipeline
19 pressure sensor, 41 pipeline
20 pressure sensor, 42 vacuum pump
21 valve, 43 pipeline
22 valve P test gas
Claims (26)
1. one kind is for implementing tightness detection to the fuel rod box (3) comprising at least one fuel rod (2) and test gas (P)
Device (1), including being configured to the test container (4) for accommodating at least one fuel rod box (3), the test container is energy
It enough sinks in the water-filled pond (5) of nuclear facility, which is characterized in that mass spectrograph (14) and the test container (4)
Internal flow connection, make it possible to the mass spectrograph (14) supply air-flow for detect from the fuel rod box (3) spread
To the concentration of the test gas (P) in the test container (4).
2. the apparatus according to claim 1 (1), which is characterized in that argon gas is provided as test gas (P) and described
The concentration for the argon gas that mass spectrograph (14) detection is diffused out from the fuel rod box (3).
3. device (1) according to claim 1 or 2, which is characterized in that the test container (4) can be as follows
Exhaust, so that in the inside of the test container (4), stream caused by the water relative to the surrounding by the test container (4)
Body static pressure and reduced internal pressure is adjustable.
4. device (1) according to any one of claim 1 to 2, which is characterized in that the test container (4) is in lower end
Connection equipment (8) with the inside for being connected to the pond (5).
5. device (1) according to claim 4, which is characterized in that the connection equipment (8) is located at the water surface in pond (5)
Lower section depths, and the upper end of the test container (4) can be fluidly connected with the first reservoir (30), and flushing gas can press
It is stored under power in first reservoir, the pressure is greater than the stream for corresponding to the water of surrounding of described connection equipment (8) depths
Body static pressure.
6. device (1) according to claim 5, which is characterized in that first reservoir (30) is and the mass spectrograph
(14) what sample point (13) can fluidly connect.
7. device (1) according to claim 6, which is characterized in that the sample point (13) of the mass spectrograph (14) is
It can be fluidly connected with the second reservoir (31), the test gas (P) can be stored under stress in second reservoir.
8. device (1) according to claim 7, which is characterized in that the sample point (13) and first reservoir (30)
Between and/or the sample point (13) and second reservoir (31) between be disposed at least one volume regulating valve (22,23,
25)。
9. the device (1) according to any one of claim 5-8, which is characterized in that the inside of the test container (4) exists
Upper end can be fluidly connected with the sample point (13) of the mass spectrograph (14), so that being present in the test container (4)
Air column can be transported to the sample point by introducing water by the connection equipment (8) for being arranged in test container lower end
(13)。
10. device (1) a method according to any one of claims 6-8, which is characterized in that Xiang Suoshu mass spectrograph (14) it is described
The volume flow of the air-flow of sample point (13) supply can change by control equipment.
11. device (1) according to claim 10, which is characterized in that the control equipment with for measuring the sampling
Pressure sensor (20) connection of pressure at point.
12. according to claim 1-2, device (1) described in any one of 5-8 and 11, which is characterized in that the fuel rod box
(3) it can be introduced in the test container (4) via the closeable opening (6) for being arranged in end side.
13. according to claim 1-2, device (1) described in any one of 5-8 and 11, which is characterized in that described device (1)
The component being arranged in outside pond is at least partially partiting thermal insulation (28).
14. device (1) according to claim 13, which is characterized in that being arranged in the component of pond (5) outside can be by heating
Equipment is at least partly heated.
15. device (1) a method according to any one of claims 6-8, which is characterized in that Xiang Suoshu mass spectrograph (14) it is described
The volume flow of the air-flow of sample point (13) supply can be come by least another volume regulating valve (25) or vacuum pump (42)
Change.
16. according to claim 1-2, device (1) described in any one of 5-8 and 11, which is characterized in that described device (1)
The pipeline (12,16,17,18) and/or line segments (11) being arranged in outside pond are at least partially partiting thermal insulation (28).
17. a kind of be used for using device (1) described in any one of any one of claims 1 to 16 16 to including at least one fuel rod (2)
Implement the method for tightness detection with the fuel rod box (3) of test gas, wherein at least one fuel rod box (3), which is introduced into, to have sunk
Enter in the test container (4) in the pond (5) of nuclear facilities being filled, which is characterized in that mass spectrograph (14) supply containing from
The fuel rod box (3) is diffused into the air-flow of the test gas (P) in the test container (4), and examines by mass spectrograph (14)
Survey the concentration of the test gas (P) being diffused into the test container (4) from the fuel rod box (3) in the air-flow
To detect slip.
18. according to the method for claim 17, which is characterized in that the fuel rod box (3) is introduced the survey under water
The water in the test container (4) is penetrated into examination container (4) and with flushing gas displacement.
19. according to the method for claim 18, which is characterized in that the flushing gas will contained and from the fuel rod
The air-flow for the test gas (P) that box (3) diffuses out is supplied to before the mass spectrograph (14), and the flushing gas is in institute
Stating the middle reservation of test container (4) can predetermined time period.
20. method described in any one of 7 to 19 according to claim 1, which is characterized in that with the water submerged in the pond (5)
The test container (4) is to generate air-flow.
21. method described in any one of 7 to 19 according to claim 1, which is characterized in that mass spectrograph at sample point (13)
(14) air-flow is supplied, and adjusts the volume flow of air-flow as follows, so that being constant pressure at the sample point (13).
22. according to the method for claim 21, which is characterized in that the supply of Xiang Suoshu sample point (13) with controlling contains punching
The admixture of gas of the predetermined mix ratio of gas washing body or test gas.
23. method described in any one of 7-19 and 22 according to claim 1, which is characterized in that be arranged in pond (5) outside described
The component of device (1) is at least partially heated.
24. method described in any one of 7-19 and 22 according to claim 1, which is characterized in that be arranged in pond (5) outside described
The pipeline (12,16,17,18) and/or line segments (11) of device (1) are at least partially heated.
25. method described in any one of 7-19 and 22 according to claim 1, which is characterized in that use inert gas as examination
Test gas.
26. according to the method for claim 25, which is characterized in that use argon gas as test gas.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014118623.0 | 2014-12-15 | ||
| DE102014118623.0A DE102014118623B3 (en) | 2014-12-15 | 2014-12-15 | Apparatus and method for performing a leak test on fuel rod capsules |
| PCT/EP2015/078808 WO2016096499A1 (en) | 2014-12-15 | 2015-12-07 | Device and method for performing a leak test on fuel rod capsules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107004448A CN107004448A (en) | 2017-08-01 |
| CN107004448B true CN107004448B (en) | 2019-07-16 |
Family
ID=
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| CN87105703A (en) * | 1987-03-27 | 1988-10-19 | 莱博尔德有限公司 | Leakage detector with and method of work |
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| WO2007071337A1 (en) * | 2005-12-20 | 2007-06-28 | Areva Np Gmbh | Device for testing the tightness of fuel rod capsules |
| CN100549650C (en) * | 2003-05-31 | 2009-10-14 | 因菲康有限公司 | Leak rate measuring device |
| CN103162918A (en) * | 2013-03-12 | 2013-06-19 | 西安工业大学 | Device and method for detecting piston ring and piston rod sealing performance |
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|---|---|---|---|---|
| FR2509898A1 (en) * | 1981-07-17 | 1983-01-21 | Commissariat Energie Atomique | Rapid detection of fissures in nuclear fuel rod sleeves - where rod assembly is lifted from reactor core into inspection hood through which gas flows to collect any radioactive leakage due to fissure |
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| WO2007071337A1 (en) * | 2005-12-20 | 2007-06-28 | Areva Np Gmbh | Device for testing the tightness of fuel rod capsules |
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