CN207036219U - A kind of device for measuring nuclear reactor vessel liquid level - Google Patents
A kind of device for measuring nuclear reactor vessel liquid level Download PDFInfo
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- CN207036219U CN207036219U CN201720485943.7U CN201720485943U CN207036219U CN 207036219 U CN207036219 U CN 207036219U CN 201720485943 U CN201720485943 U CN 201720485943U CN 207036219 U CN207036219 U CN 207036219U
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Abstract
The utility model provides a kind of device for measuring nuclear reactor vessel liquid level, and the device includes：Time controller, signal generator, transmitting terminal, receiving terminal, amplifier, waveform processor, ultrasonic wave detection tube, time controller connects with signal generator and waveform processor communication, signal generator is connected with transmitting end communication, receiving terminal connects with amplifier communication, and amplifier connects with waveform processor communication；Ultrasonic wave detection tube includes the pipeline section of at least two connections, and pipeline section internal diameter is sequentially reduced towards nuclear reactor coolant direction, and the numerical value of nuclear reactor vessel liquid level is calculated in the reception time for the ultrasonic wave that waveform processor reflects according to pipeline section, and segment length.The utility model can determine " liquid level or ultrasonic transmission distance and ultrasonic transmission time ratios relation K values " in measurement process, there is the environment of the change of obvious thermograde or gas density gradient change in nuclear reactor, can also accomplish accurately to measure nuclear reactor vessel liquid level.
Description
Technical field
It the utility model is related to technical field of nuclear power, more particularly to a kind of device side for measuring nuclear reactor vessel liquid level
Method.
Background technology
Cooling agent is covered with the container of the nuclear reactor in nuclear power station at present, the liquid level of cooling agent is to reactor fuel
Cooling and the safe operation of whole reactor are most important.Cooling agent in the equipment design and arrangement, reactor of nuclear reactor
Material composition, reactor Transient safety performance criteria etc. propose high request to the refrigerant level measurement scheme of reasonable.
Refrigerant level measures in presurized water reactor at present, including voltage-stablizer level gauging and Spent Fuel Pool measurement etc., generally
Using pressure sensor, or microwave, sound wave, ultrasonic wave, radar or the main measurement major class of laser measuring apparatus two.
When disposing pressure sensor, in addition to disposing width range differential manometer, it is also necessary to dispose one and refer to differential manometer.
The differential manometer mainly considers influence of the temperature change to pressure sensor in reactor, for correcting wide-range and narrow range pressure
Difference meter.
Either pressure sensor or ultrasonic sensor, for substantially there is the region of thermograde change in reactor,
All it is difficult to obtain accurate measurement result, larger error can be introduced.Thermograde is closed in the measurement of liquid level distance and reactor
System is obvious.
When disposing ultrasonic detector, it is necessary to be demarcated for the measurement distance and precision of ultrasonic wave.The demarcation is led to
Carried out under Chang Fei normal reactor operation operating modes, such as before reactor start-up, after shutdown etc..Operating mode (the example of measurement demarcation
Such as temperature, coolant conditions) all larger difference be present with actual operating mode.Therefore the decline of stated accuracy is caused.
So that ultrasonic sensor measures as an example, generally use off-line calibration mode, i.e., test into some in the prior art
The determination of " liquid level or distance and ultrasonic transmission time ratios relation K values " is carried out under room or stable environment.The values of factor K determines
After will not be changed with working environment.In the work environment, because without reference distance, original technology can not be marked online
Defining K value.By on-line measurement ultrasonic transmission time and the K values of calculated in advance, and then determine liquid level or distance.Prior art
The defects of obvious, is that offline " liquid level or distance and ultrasonic transmission time ratios relation K values " application condition is big.It is because anti-
Answer in heap environment, obvious thermograde change in the range of whole measurement distance be present, defined and (do not considered offline with one
Actual environment) parameter, larger error can be caused.Current e measurement technology is difficult in reactor there is obvious thermograde to become
The environment of change carries out high-precision measurement.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of device for measuring nuclear reactor vessel liquid level.
A kind of device for measuring nuclear reactor vessel liquid level provided by the utility model, including：Time controller, signal hair
Raw device, transmitting terminal, receiving terminal, amplifier, waveform processor, ultrasonic wave detection tube, the time controller respectively with the letter
Number generator and waveform processor communication connection, the signal generator are connected with the end communication of launching, the reception
End connects with amplifier communication, and the amplifier connects with waveform processor communication；
The ultrasonic wave detection tube include at least two connection pipeline sections, and the pipeline section internal diameter of the ultrasonic wave detection tube according to
Secondary reduction；
The time controller exports emissioning controling signal to the signal generator and the waveform processor, the letter
Number generator according to corresponding to generating the emissioning controling signal transmitting pulse signal and output to the transmitting terminal, the transmitting
Hold the ultrasonic wave according to corresponding to the transmitting pulse signal generation and launch；
The receiving terminal receives the ultrasonic wave reflected and is converted into corresponding electric signal, and the electric signal is passed through
Return pulse signal corresponding to generation and exported after the amplifier is amplified to the waveform processor, the waveform processing
Device obtains the reception time of corresponding ultrasonic wave according to the return pulse signal and the emissioning controling signal, and according to described super
The numerical value of nuclear reactor vessel liquid level is calculated in the length of pipe section of acoustic detection pipe.
Preferably, the transmitting terminal and the receiving terminal face the mouth of pipe of the ultrasonic wave detection tube；The ultrasonic wave
The periphery of detection pipes is enclosed with the material for reducing noise caused by nuclear reactor or outer signals interference.
Preferably, in addition to the display with waveform processor communication connection, the waveform processor will calculate
Numerical value to nuclear reactor liquid level is shown by the display.
Preferably, when in the ultrasonic wave detection tube corresponding pipeline section be located in the refrigerant level of nuclear reactor vessel
Portion and apart from the refrigerant level reach default first apart from when, default support force is reached by support force intensity outside it
The material of strength criterion is made.
Preferably, when in the ultrasonic wave detection tube corresponding pipeline section be located at the refrigerant level bottom, or be located at
The cooling agent top and apart from the refrigerant level be less than default second distance when, by corrosion resistance intensity outside it
The material for reaching default corrosion resistance strength criterion is made.
Preferably, when the pipeline section quantity of the ultrasonic wave detection tube is 2, the pipe close to nuclear reactor vessel liquid level is set
The pipeline sections of Duan Wei 2, the pipeline section close to the receiving terminal is the 1st pipeline section, and the receiving terminal receives the time of ultrasonic wave for the first time
For T1, the time for receiving ultrasonic wave for the second time is T2, and in the waveform processor preset the 1st pipeline section length M1With
The length M of 2nd pipeline section2Value, the waveform processor calculates nuclear reactor vessel liquid level M according to following equations0：
M0=M2-M1*(T2-T1)/T1。
Preferably, when the pipeline section quantity of the ultrasonic wave detection tube is n, during wherein n >=3, from the receiving terminal to close
The nuclear reactor vessel liquid level direction, the pipeline section of the ultrasonic wave detection tube is set as the 1st pipeline section, the 2nd pipe successively successively
Section ..., the n-th -2 pipeline section, the (n-1)th pipeline section, the n-th pipeline section, receive the time corresponding to different ultrasonic waves:T1、T2、……、Tn-2、
Tn-1、Tn, and corresponding length of pipe section is respectively：M1、M2、……、Mn-2、Mn-1、Mn, then the waveform processor is according to following sides
Journey calculates nuclear reactor vessel liquid level M0：Kn-1+(M0+Mn-1)/(Mn-1+Mn-2)*(Kn-1-Kn-2)=M0*(Tn-Tn-1), wherein,
Kn-1=Mn-1/(Tn-1-Tn-2), Kn-2=Mn-2/(Tn-2-Tn-3), T0=0.
Implement the utility model, have the advantages that：The superjacent air space of nuclear reactor vessel liquid level temperature with
And the gas density of covering is into graded, and when changing linear, because the utility model measures nuclear reactor vessel
The ultrasonic wave detection tube of level gauge uses the detection pipes of segmented, and receiving terminal can receive the ultrasound that different pipe sections reflect
Ripple, time of the waveform processor according to needed for receiving corresponding ultrasonic wave, and the length of each pipeline section, so it is known that " liquid
Position or ultrasonic transmission distance and ultrasonic transmission time ratios relation K values ", nuclear reaction can be calculated further according to the K values
Heap tank fill level, the utility model are to determine the K values in actual measurement process, have obvious temperature in nuclear reactor
The environment of graded or gas density gradient change is spent, can also accomplish accurately to measure nuclear reactor vessel liquid level.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the principle assumption diagram of the device of measurement nuclear reactor vessel liquid level provided by the utility model.
Noise jamming schematic diagram when Fig. 2 is measurement nuclear reactor vessel liquid level provided by the utility model.
Fig. 3 is the deployment schematic diagram of the device of measurement nuclear reactor vessel liquid level provided by the utility model.
Fig. 4 is the method flow diagram of measurement nuclear reactor vessel liquid level provided by the utility model.
Fig. 5 is the ultrasonic wave oscillogram of measurement nuclear reactor vessel liquid level provided by the utility model.
Embodiment
The utility model provides a kind of device for measuring nuclear reactor vessel liquid level, as shown in figure 1, the device includes：
Time controller 100, signal generator 200, transmitting terminal 300, receiving terminal 400, amplifier 500, waveform processor 600, ultrasound
Ripple detection pipes 700, time controller 100 connect with signal generator 200 and the communication of waveform processor 600 respectively, and signal occurs
Device 200 connects with the communication of transmitting terminal 300, and receiving terminal 400 connects with the communication of amplifier 500, amplifier 500 and waveform processor
600 communication connections.
Ultrasonic wave detection tube 700 includes the pipeline section of at least two connections, and the pipeline section internal diameter North Korea nuclear of ultrasonic wave detection tube 700
Reactor coolant direction is sequentially reduced, it is necessary to illustrate, the internal diameter of each pipeline section is constant, and the connection of two neighboring pipeline section
Place forms the reflection platform of ultrasonic wave.Here when ultrasonic wave detection tube 700 is using segmented outer tube structure, the outside of every section of pipeline section
Material can be different.Because the neutron irradiation of reactor in-core, temperature field, cooling agent corrosive environment etc. substantially become in gradient
Change, therefore different pipe sections corresponding to ultrasonic wave detection tube 700 can be made according to the different material of residing environmental selection, with profit
In the life-span of whole measurement apparatus.In addition, the length of different pipeline sections can differ.
The quantity of the pipeline section of ultrasonic wave detection tube 700 can be according to the environment residing for the reactor vessel to be measured come really
It is fixed, when the gas density gradient change that the thermograde residing for reactor changes greatly or reactor vessel liquid level top covers
It is larger, and when graded is linear, the quantity of pipeline section can increase；When the temperature residing for reactor or reactor are held
The gas density gradient change of device liquid level top covering is smaller, and when graded is linear, the quantity of pipeline section can phase
It should reduce.
Time controller 100 exports emissioning controling signal to signal generator 200 and waveform processor 600, signal and occurred
Device 200 is launched pulse signal according to corresponding to generating emissioning controling signal and exported to transmitting terminal 300, and transmitting terminal 300 is according to hair
Penetrate ultrasonic wave corresponding to pulse signal generation and launch.Specifically, ultrasonic transducer is may be provided with transmitting terminal 300, when
Between the emissioning controling signal that exports of controller 100 can be civil power signal, signal generator 200 city's electric signal is converted into and
The high-frequency ac pulse signal of ultrasonic transducer matching, ultrasonic transducer are converted into pair according to the high-frequency ac pulse signal
The ultrasonic wave transmitting answered.Specifically, transmitting terminal 300 and receiving terminal 400 face the mouth of pipe of ultrasonic wave detection tube 700, to avoid
The tube wall meeting reflectance ultrasound ripple of ultrasonic wave detection tube, interfere with the result of measurement.
Receiving terminal 400 receives the ultrasonic wave reflected and is converted into corresponding electric signal, and by the electric signal by putting
Return pulse signal corresponding to generation and exported after big device 500 is amplified to waveform processor 600, waveform processor 600
The reception time of corresponding ultrasonic wave is obtained according to return pulse signal and emissioning controling signal, and according to ultrasonic wave detection tube 700
The numerical value of nuclear reactor vessel liquid level is calculated in length of pipe section.Specifically, waveform processor 600 is according to time controller
At the time of the emissioning controling signal of 100 outputs obtains transmitting terminal transmitting ultrasonic wave, obtain what is received according to return pulse signal
At the time of corresponding to different ultrasonic waves, the reception time corresponding to different ultrasonic waves is then calculated, further according to each pipeline section
Length, corresponding to calculating " liquid level or ultrasonic transmission distance and the ratio K of ultrasonic transmission time ", finally according to the K values come
Calculate the liquid level of nuclear reactor vessel.
Further, the periphery of ultrasonic wave detection tube 700 is enclosed with for reducing noise caused by nuclear reactor or the external world
The material of signal interference.As shown in Fig. 2 when measuring nuclear reactor vessel liquid level, the interference of other extraneous noises is had, such as
Influenceed by the environment of neutron irradiation, photon radiation, electronic signal, can cause receiving terminal 400 except receive reflect it is super
Outside sound wave, it is also possible to other interference signals can be received, so as to influence the result of measurement, in ultrasonic wave detection tube 700
Periphery be enclosed with for reduce noise caused by nuclear reactor or the external world neutron irradiation, photon radiation, disturbance of electronic signal
Material, to ensure to reduce noise jamming, improve the degree of accuracy of measurement.
Further, the device of the measurement nuclear reactor vessel liquid level also includes and the communication connection of waveform processor 600
Display 800, waveform processor 600 are shown after the numerical value of nuclear reactor liquid level is calculated by display 800.
Further, when in ultrasonic wave detection tube 700 corresponding pipeline section be located in the refrigerant level of nuclear reactor vessel
Portion and apart from the refrigerant level reach default neutron irradiation less first apart from when, reached by support force intensity outside it
Material to default support force strength criterion is made, such as T91 steel, and support force is stronger, the related mechanics of industrial T91 steel and
Corrosive nature etc. is all fully analyzed, and its support force is general compared with strong but radiation performance, it is understood that there may be brittle risk, it is necessary to
Carry out the limitation of neutron irradiation intensity.
When corresponding pipeline section is located at refrigerant level bottom in ultrasonic wave detection tube 700, or positioned at the cooling agent top,
And apart from the refrigerant level be less than default neutron irradiation stronger second distance when, reached by corrosion resistance intensity outside it
The material of default corrosion resistance strength criterion is made, such as can select 316L steel, and its corrosion resistance is stronger, and 316L steel
Brittle risk unobvious.
Further, when the pipeline section quantity of ultrasonic wave detection tube 700 is 2, set close to nuclear reactor vessel liquid level
Pipeline section is the 2nd pipeline section, and the pipeline section close to receiving terminal 400 is the 1st pipeline section, and the first time of receiving terminal 400 receives the time of ultrasonic wave
For T1, the time for receiving ultrasonic wave for the second time is T2, and in waveform processor 600 preset the 1st pipeline section length M1With the 2nd pipe
The length M of section2Value, and calculate nuclear reactor vessel liquid level M according to following equations0：M0=M0=M2-M1*(T2-T1)/T1, M0
For the distance of the pipeline section of nuclear reactor vessel liquid level distance the 1st and the 2nd connection between pipe sections.
The pipeline section quantity of ultrasonic wave detection tube 700 is set to n, during wherein n >=3, holds from receiving terminal 400 to close to nuclear reactor
Device liquid level direction, successively by the pipeline section of ultrasonic wave detection tube 700 be set as successively the 1st pipeline section, the 2nd pipeline section ..., n-th -2 pipe
Section, the (n-1)th pipeline section, the n-th pipeline section, receive the time corresponding to different ultrasonic waves:T1、T2、……、Tn-2、Tn-1、Tn, and corresponding pipe
Segment length is respectively：M1、M2、……、Mn-2、Mn-1、Mn, then waveform processor 600 according to following equations come calculate nuclear reactor hold
Device liquid level M0：Kn-1+(M0+Mn-1)/(Mn-1+Mn-2)*(Kn-1-Kn-2)=M0*(Tn-Tn-1), wherein, Kn-1=Mn-1/(Tn-1-
Tn-2), Kn-2=Mn-2/(Tn-2-Tn-3), T0=0, M0For the n-th pipeline section of nuclear reactor vessel liquid level distance and the (n-1)th connection between pipe sections
Distance.
In the utility model, ultrasonic wave detection tube 700 using specific segmented geometry (ultrasonic wave detection tube
Entire length and the length determination that pipeline section is corresponded in measurement process, there is reference distance), multiple different pipe sections pair can be defined
Answer " liquid level or ultrasonic transmission distance and the ultrasonic transmission time ratios relation K " of ultrasonic transmission distance segment.It is such good
Be in, when measuring environment be in obvious temperature gradient change or Media density be clearly present graded when, can be effective
Consider the graded of K values, and then can accurately calculate the K values in practical application, and calculate nuclear reactor vessel
Liquid level.
As shown in figure 3, it is of the present utility model measurement nuclear reactor vessel liquid level device deployment when, by ultrasonic listening
The side of pipe is stretched into below the liquid level of nuclear reactor.
The utility model also provides a kind of method for measuring nuclear reactor vessel liquid level, holds in above-mentioned measurement nuclear reactor
Realized in the device of device liquid level, as shown in figure 4, this method comprises the steps：
S100, transmitting terminal 300 launch ultrasonic wave against at the mouth of pipe of ultrasonic wave detection tube 700.
S200, receiving terminal 400 receive the ultrasonic wave reflected, and the time data according to corresponding to receiving ultrasonic wave, with
And length of pipe section data corresponding to ultrasonic wave detection tube 700, the numerical value of nuclear reactor vessel liquid level is calculated.
Further, step S100 includes：
S110：Time controller 100 exports emissioning controling signal to signal generator 200 and waveform processor 600, signal
The output pulse signal according to corresponding to generating emissioning controling signal of generator 200, and export to transmitting terminal 300.
S120：Transmitting terminal 300 ultrasonic wave and is launched according to corresponding to generating the output pulse signal.
Step S200 includes：
S210, receiving terminal 400 receive the ultrasonic wave reflected, and are amplified and are converted into correspondingly by amplifier 500
Return pulse signal output waveform processor 600.
S220, waveform processor 600 receive return pulse signal from amplifier 500 and time controller 100 is defeated
The emissioning controling signal gone out, obtain and receive the time corresponding to different ultrasonic waves:T1、T2、……、Tn-2、Tn-1、Tn, wherein n >=2,
Further according to the 1st pipeline section of corresponding ultrasonic wave detection tube, the 2nd pipeline section ..., length M corresponding to the n-th pipeline section1、M2、……、Mn-2、
Mn-1、Mn, and calculate nuclear reactor vessel liquid level M according to following equations0：
If n=2, M0=M2-M1*(T2-T1)/T1；
If n >=3, Kn-1+(M0+Mn-1)/(Mn-1+Mn-2)*(Kn-1-Kn-2)=M0*(Tn-Tn-1), wherein, Kn-1=Mn-1/
(Tn-1-Tn-2), Kn-2=Mn-2/(Tn-2-Tn-3), T0=0.
For example, as n=3, then M is calculated according to following equations0：
K2+(M0+M2)/(M2+M1)*(K2-K1)=M0*(T3-T2), wherein, K2=M2/(T2-T1), K1=M1/T1, it is corresponding
Ultrasonic wave oscillogram is proportional to M as shown in figure 5, the 1st pipeline section of reception reflects the ultrasonic wave corresponding time for receiving pulse 11,
Receive the 1st pipeline section and reflect and receive time of pulse 2 corresponding to ultrasonic wave and be proportional to M2, the 1st pipeline section of reception reflects super
The time that pulse 3 is received corresponding to sound wave is proportional to M3。
Further, waveform processor 600 is aobvious by display 800 after nuclear reactor vessel liquid level M0 is calculated
Show.
The device of measurement nuclear reactor vessel liquid level of the present utility model, in the superjacent air space of nuclear reactor vessel liquid level
Temperature and the gas density of covering are into graded, and when changing linear, due to the ultrasonic wave detection tube of the present apparatus
700 using segmenteds detection pipes, and the detection pipes are along transmitting terminal 300 to nuclear reactor vessel direction, corresponding pipeline section internal diameter according to
Secondary reduction, receiving terminal 400 can receive the ultrasonic wave that different pipe sections reflect, and waveform processor 600 is according to time controller
At the time of the time control signal of 100 outputs is known that transmitting ultrasonic wave, further according to the ultrasonic wave moment received, Ke Yizhi
Road receives the time needed for corresponding ultrasonic wave, and the length of pipeline section is known, so it is known that " liquid level or ultrasonic wave
Transmission range and ultrasonic transmission time ratios relation K values ", nuclear reactor vessel liquid level can be calculated further according to the K values,
The utility model is to determine the K values in actual measurement process, has the change of obvious thermograde in nuclear reactor
Or the environment of gas density gradient change, it can also accomplish accurately to measure nuclear reactor vessel liquid level.
Further, the ultrasonic wave detection tube 700 in the device of measurement nuclear reactor vessel liquid level of the present utility model
It is relatively near or positioned at the lower section of nuclear reactor vessel liquid level in the tank fill level apart from nuclear reactor using segmentation structure, in
The radiation of son is very strong, and corrosivity is very strong, and the outside of pipeline section now may be selected the stronger material of corrosion resistance and be made, apart from core
The tank fill level of reactor farther out when, neutron irradiation is weaker, and the material that support force can be selected stronger is made, and passes through this choosing
Select, the service life of the device can be extended.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (5)
- A kind of 1. device for measuring nuclear reactor vessel liquid level, it is characterised in that including：Time controller (100), signal occur Device (200), transmitting terminal (300), receiving terminal (400), amplifier (500), waveform processor (600), ultrasonic wave detection tube (700), the time controller (100) connects with the signal generator (200) and the waveform processor (600) communication respectively Connect, the signal generator (200) connects with the transmitting terminal (300) communication, the receiving terminal (400) and the amplifier (500) communication connection, the amplifier (500) connect with the waveform processor (600) communication；The ultrasonic wave detection tube (700) includes the pipeline section of at least two connections, and the pipeline section of the ultrasonic wave detection tube (700) Internal diameter is sequentially reduced；The time controller (100) exports emissioning controling signal to the signal generator (200) and the waveform processor (600), the signal generator (200) is launched pulse signal according to corresponding to emissioning controling signal generation and exported to institute State transmitting terminal (300), the transmitting terminal (300) ultrasonic wave and is launched according to corresponding to the transmitting pulse signal generation；The receiving terminal (400) receives the ultrasonic wave reflected and is converted into corresponding electric signal, and the electric signal is led to Cross return pulse signal corresponding to generation after the amplifier (500) is amplified and export to the waveform processor (600), The waveform processor (600) obtains the reception of corresponding ultrasonic wave according to the return pulse signal and the emissioning controling signal Time, and the numerical value of nuclear reactor vessel liquid level is calculated according to the length of pipe section of the ultrasonic wave detection tube (700).
- 2. the device of measurement nuclear reactor vessel liquid level according to claim 1, it is characterised in that the transmitting terminal (300) and the receiving terminal (400) faces the mouth of pipe of the ultrasonic wave detection tube (700)；The ultrasonic wave detection tube (700) Periphery be enclosed with for reduce noise caused by nuclear reactor or outer signals interference material.
- 3. the device of measurement nuclear reactor vessel liquid level according to claim 1, it is characterised in that also include and the ripple Nuclear reactor liquid level will be calculated in the display (800) of shape processor (600) communication connection, the waveform processor (600) Numerical value pass through the display (800) show.
- 4. the device of measurement nuclear reactor vessel liquid level according to claim 1, it is characterised in that when the ultrasonic wave is visited Corresponding pipeline section is located at the refrigerant level top of nuclear reactor vessel and reached apart from the refrigerant level in test tube (700) To default first apart from when, the material for reaching default support force strength criterion outside it by support force intensity is made.
- 5. the device of measurement nuclear reactor vessel liquid level according to claim 4, it is characterised in that when the ultrasonic wave is visited Corresponding pipeline section is located at the refrigerant level bottom in test tube (700), or positioned at the cooling agent top and apart from described When refrigerant level is less than default second distance, default corrosion resistance strength criterion is reached by corrosion resistance intensity outside it Material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720485943.7U CN207036219U (en) | 2017-05-04 | 2017-05-04 | A kind of device for measuring nuclear reactor vessel liquid level |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720485943.7U CN207036219U (en) | 2017-05-04 | 2017-05-04 | A kind of device for measuring nuclear reactor vessel liquid level |
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| Publication Number | Publication Date |
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| CN207036219U true CN207036219U (en) | 2018-02-23 |
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ID=61478840
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| CN201720485943.7U Active CN207036219U (en) | 2017-05-04 | 2017-05-04 | A kind of device for measuring nuclear reactor vessel liquid level |
Country Status (1)
| Country | Link |
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2017
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