CN205810387U - A kind of nuclear power station spent fuel reservoir monitoring device - Google Patents
A kind of nuclear power station spent fuel reservoir monitoring device Download PDFInfo
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- CN205810387U CN205810387U CN201620716525.XU CN201620716525U CN205810387U CN 205810387 U CN205810387 U CN 205810387U CN 201620716525 U CN201620716525 U CN 201620716525U CN 205810387 U CN205810387 U CN 205810387U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The nuclear power station spent fuel reservoir monitoring device that this utility model provides includes level gauging module and temperature-measuring module, the signal processing cabinet electrically connected with the two respectively and power cabinet, level gauging module includes: guided wave head, is fixed on nuclear power station spent fuel reservoir ullage by a mounting bracket；The guided wave cable of electrical connection below guided wave head, a weight is assembled in its one end downwardly extended；Described temperature-measuring module includes: in the armoured cable that described mounting bracket is fixing, and armoured cable downwardly extends electrical connection and is fixed on the hygrosensor at described weight；Armoured cable upper end extends to far-end and electrically connects a temperature transmitter；Signal processing cabinet is located at outside nuclear power station spent fuel reservoir region, electrically connects with described guided wave head and temperature transmitter.Device, by the metering system of long-range pick-up, obtains the liquid level in Spent Fuel Pool and state of temperature, makes electronic unit be no longer influenced by radioprotective interference, carries out the risk being likely to occur and alarm, to stop potential safety hazard.
Description
Technical field
This utility model relates to nuclear safety technical field, particularly to a kind of nuclear power station spent fuel reservoir monitoring device.
Background technology
Nuclear power station mostly has storage of spent fuel pond at present, after a cycle of operation of reactor terminates, and will
It is discharged in Spent Fuel Pool cool down by the irradiated fuel assembly of about 1/3 reactor core in heap.The irradiated fuel assembly just drawn off has relatively
High decay heat, after cooling down for many years in pond, decay heat drops to of a sufficiently low just to be transported to reprocessing plant or permanent
Storage field.For ensureing the normal cooling of spentnuclear fuel, the water in weary pond must be sufficient.In March, 2011, there is Fukushima core in Japan
Accident.According to feedback, after Fukushima nuclear power station beyond design basis accident, Spent Fuel Pool loses normal cooling, in Spent Fuel Pool
Decay heat relies on pond evaporation of water, boiling to take away, thus cause the rapid decrease of pond liquid level.Additionally pond liners and and water
Pipeline that pond is connected it can also happen that cut and cause the decline of pond liquid level, due to water-level and water-temperature without function of seismic resistance in weary pond
Monitoring device, its water level degradation is not but known, thus causes the nuclear explosion of spentnuclear fuel Factory Building.Therefore, in Spent Fuel Pool
Water level and temperature carry out implement monitoring be required.
Publication No. CN204064399U Split ultrasonic level meter, by Split ultrasonic level meter main frame and
Ultrasound probe is constituted, and uses digital form to carry out signal and lead between Split ultrasonic level meter main frame and ultrasound probe
Letter, includes inside ultrasound probe and drives the transmitting of ultrasonic transducer work to drive electronic unit, for receiving echo letter
Number echo signal processing electronic unit and control two cell operation single-chip microcomputer, the ultrasonic wave transducer within ultrasound probe
Device is the single transducer of transmitting-receiving unification.As it is shown in figure 1, be installed in the ultrasound probe measured in tank containing single-chip microcomputer, driving
The devices such as the integrated circuit such as unit and signal receiving unit and amplifier, these type of electronic devices and components are the most sensitive to radioprotective, typically
It is only capable of bearing the radiation accumulated dose of maximum 100Gy, and the radiation of nuclear power spent fuel upper core under extreme conditions can reach
Nearly 500KGy, after in-site installation, this guided wave radar material level gauge measurement system will soon lose efficacy.It addition, this patent there is also following
Defect:
1, ultrasound wave is mechanical wave, and because of sound wave vibration sounding to be leaned on, when ambient pressure is big, sound-generating element is impacted；And it passes
Broadcast speed closely related with the state of communication media, therefore affected condition (temperature, pressure etc.) is more；
2, ultrasonic frequency is generally several ten thousand hertz, therefore its penetration capacity is poor, and in signals transmission, decay is relatively big,
Faint echo-signal is passed through to produce bigger decay during longer signal cable, makes signal receiving processing system amplify it
Identification difficulty；
3, ultrasonic echo signal is easily subject to outside electromagnetic interference and the excessive noise that adulterates, extraneous strong electromagnetic interference
Noise is likely to flood faint echo-signal, causes the None-identified of echo or is amplified by noise, forming the measured value of mistake；
4, ultrasonic level gage may not apply to vacuum, steam content is too high or liquid level has the operating modes such as foam.
It addition, Publication No. CN204101129U guided wave radar material level gauge system is a kind of to be contained in tank for determining
The guided wave radar material level gauge system of the implant position of article, this system includes: tank, and it has inwall, top and bottom；Transmitting-receiving
Device, for launching Electromagnetic Launching signal and receiving the reflected electromagnetic signal in the reflection of the surface of article；Surface duct, it includes
Single conductor transmission line probe, surface duct is connected to transceiver, be arranged to vertically extend in tank and be configured to towards
Surface direct electromagnetic is launched signal and reflected electromagnetic signal guiding is returned to transceiver；Processing circuit, it is connected to transceiver also
It is configured to determine implant position based on the reflected electromagnetic signal received；And multiple holding element, it is arranged to be positioned at
About opening in the fixed position of the inside of tank and along probe separation, wherein, each restriction probe in holding element, and joined
It is set to allow probe to move and limit probe relative to this holding element at water relative to this holding element in the vertical direction
Square move up.
As in figure 2 it is shown, contain the integrated circuit device such as microprocessor, transmitter/receiver at the top of tested measuring tank equally
Part, these type of electronic devices and components are the most sensitive to radioprotective, are typically only capable of bearing the radiation accumulated dose of maximum 100Gy, and nuclear power
The radiation of Spent Fuel Pool upper core under extreme conditions can reach nearly 500KGy, and after in-site installation, this guided wave radar material level gauge is measured
System will soon lose efficacy.
Utility model content
In view of this, main purpose of the present utility model is, it is provided that a kind of nuclear power station spent fuel reservoir monitoring device, bag
Include level gauging module and temperature-measuring module, and the signal processor electrically connected respectively with the two.Described level gauging mould
Block is positioned at nuclear power station spent fuel reservoir region, including: guided wave head, is fixed on nuclear power station spent fuel reservoir by a mounting bracket
Ullage；The guided wave cable of electrical connection below guided wave head, a weight is assembled in its one end downwardly extended, logical in guided wave head upper end
Cross coaxial cable and extend to remote signaling processor；
Described temperature-measuring module is positioned at nuclear power station spent fuel reservoir region, including: fix in described mounting bracket
Armoured cable, armoured cable downwardly extends electrical connection and is fixed on the hygrosensor at described weight；Described armoured cable upper end extends to
Signal processor；
Described signal processor is located in the rack outside nuclear power station spent fuel reservoir region, includes at least: guided wave head liquid level
Signal processor, temperature transmitter, storage device and display device.
By upper, nuclear power station spent fuel reservoir monitoring device in-site measurement is partly installed in inside Spent Fuel Pool, by far
The metering system of journey pick-up, makes the electronic unit to radioprotective is sensitive be no longer influenced by radiation interference；Monitoring device obtains weary in real time
Liquid level in fuel pit and state of temperature, carry out and alarm the risk being likely to occur, thus stop potential safety hazard.
Optionally, described weight top is provided with the first buffer unit, and it stretches out in umbrella-shaped structure around described weight.
Optionally, the peripheral bead extended outward described in is arranged.
By upper, by increasing net sectional area, to increase whereabouts resistance, reduce whereabouts acceleration, thus realize reduction and send out
The instantaneous velocity of raw collision.
Optionally, described weight bottom is provided with the second buffer unit, including: it is located at bottom weight, arranges along weight circumference
The spring shim that multiple bases are lead angle.
By upper, compared to the pad being wholely set, the formed circumference of single pad, in weight and contacts baseplate moment, can
With according to contact position stress, thus increase time of contact further.
Optionally, described mounting bracket one end is provided with a groove matched with nuclear power station spent fuel reservoir sidewall thickness,
For card and nuclear power station spent fuel reservoir sidewall；The other end includes a platform, and described guided wave head is fixed on described by ring flange
On platform.
By upper, realize level gauging module and temperature-measuring module are fixed by described mounting bracket, to realize
Liquid level, the measurement of temperature in Spent Fuel Pool need not be punched by guided wave cable and temperature-measuring element at Spent Fuel Pool inwall
Install, it is ensured that the integrity of Spent Fuel Pool inwall.
Optionally, described guided wave head is fixed on described ring flange, and its periphery arranges a dust-and-water proof casing, described dust-proof
Waterproof case is fixed with guided wave head, is fixed on described platform by means of ring flange.
By upper, housing realizes for guided wave head and the protection of electric connector.
Optionally, described guided wave cable and described armoured cable are located in same plane, and guided wave cable is threaded connection and is fixed on
On guided wave head, armoured cable is fixed on described ring flange by card cap.
When, after the boron covering that the cross section in electromagnetic transmission space is all crystallized, the extremely low falseness that can produce electromagnetic wave is returned
Ripple signal, only part of boron crystallization is attached on part cable then not interfere with radar level echo, i.e. will not produce liquid level
Spurious signal.Therefore, use three of the cables to be located in same plane, compared to single cable, can more effectively avoid false returning
The generation of ripple signal.
Optionally, between described guided wave head and described radio frequency coaxial-cable, also include bilateral radio-frequency maser and L-type connecting bending
Head.
By upper, not only greatly reduce in-site installation space, and avoid steam condensation and easily enter connection member, cause
The risk of short circuit.
Optionally, the insulant of described level gauging module is polyether-ether-ketone.
Optionally, the insulant in described armoured cable include purity be not less than 99.5% aluminium oxide or purity be not less than
The magnesium oxide of 99.4%.
By upper, it is possible to achieve described in all parts of being positioned at outside the pond of spentnuclear fuel Factory Building can tolerate the core spoke of 500KGy
Penetrating dosage, the parts being positioned at pond can tolerate the radioprotective dosage of 1000KGy.
Accompanying drawing explanation
Fig. 1 is the principle schematic of prior art Split ultrasonic level meter；
Fig. 2 is the principle schematic of prior art guided wave radar material level gauge system；
Fig. 3 is the electronic schematic diagram of this utility model nuclear power station spent fuel reservoir monitoring device；
Fig. 4 is the mounting structure schematic diagram of this utility model nuclear power station spent fuel reservoir monitoring device；
Fig. 5 (A) is the connection diagram of prior art guided wave head and coaxial cable；
Fig. 5 (B) is the connection diagram of this utility model guided wave head and coaxial cable；
Fig. 6 is the structural representation of mounting bracket in this utility model nuclear power station spent fuel reservoir monitoring device；
Fig. 7 is the structural representation of buffer unit in this utility model nuclear power station spent fuel reservoir monitoring device.
Detailed description of the invention
For the defect overcoming prior art to exist, this utility model provides a kind of nuclear power station spent fuel reservoir monitoring device,
It is installed on inside Spent Fuel Pool, by the metering system of long-range pick-up, obtains the liquid level in Spent Fuel Pool and temperature shape
State, is carried out and alarm the risk being likely to occur, to stop potential safety hazard.
It is illustrated in figure 3 the electronic schematic diagram of nuclear power station spent fuel reservoir monitoring device, including level gauging module
11 and temperature-measuring module 12, and the signal processing cabinet 21 electrically connected with the two respectively, also include and described signal processing cabinet
The 21 long-range display cases 31 connected.
Described level gauging module 11 is for detecting the liquid level degree of depth of Spent Fuel Pool.As shown in Figure 4, described level gauging
Module 11 includes that guided wave head 103, guided wave cable 108 and weight 109, described weight 109 are used for keeping guided wave cable 108 vertical.Also wrap
Include the liquid level signal processor (not shown) of far-end, described liquid level signal processor by the distance coaxial cable of resistance to radioprotective with
Described guided wave head 103 electrically connects, and is located in signal processing cabinet 21.
The operation principle of level gauging module 11 is: liquid level signal processor controls the electromagnetic wave letter that tranmitting frequency is 200M
Number, this signal transmits through the distance coaxial cable of resistance to radioprotective, through guided wave head 103 along guided wave cable 108 surface and both sides temperature line
The spatial transmission that cable is constituted, when this signal runs into air with water interface, produces a reflected signal, and this reflected signal passes through guided wave
Cable 108 receives and propagates, and final guided wave head 103 is received.To be adopted by the radiotolerant coaxial cable of described distance again
Reflected signal to liquid level signal processor, is converted into 4～20mA by liquid level signal processor by the reflected signal output that collection arrives
Liquid level signal carries out locally displayed and teletransmission to long-range display case 31.
In the present embodiment, the internal each parts insulant of level gauging module 11 is polyether-ether-ketone resin (PEEK), should
Insulation insulant is the special engineering plastics of a kind of excellent performance, has more the most excellent compared with other special engineering plastics
Gesture, resistance to positive high temperature 260 degree, mechanical performance are excellent, self lubricity is good, chemicals-resistant burn into is fire-retardant, peel resistance, wearability, anti-
Radiation.
Described coaxial cable is the low attenuating RF coaxial cable that can tolerate 500KGy radiation, and farthest transmission range is 80m,
Simultaneously this coaxial cable can 100 DEG C, normally work under the conditions of the high-temperature vapor of 100%RH.Further, such as Fig. 5 (B) institute
Show, in the present embodiment, between bilateral radio-frequency maser and described coaxial cable, be provided with L-type connecting bend, described bilateral radio-frequency maser and L
Polyether-ether-ketone resin insulant that type connecting bend is provided with and the encapsulant of silicone rubber, can tolerate 500KGy irradiation agent
Amount.Compared to the prior art shown in Fig. 5 (A), such scheme can avoid radiation damage and the risk of short circuit.Concrete analysis is such as
Under:
In bilateral radio-frequency maser in industry at present, insulant is not the most resistant to high dose radiation, and wherein one end is direct
Connecting coaxial cable, so that under conditions of hot and humid, steam condensation can flow in bilateral radio-frequency maser along coaxial cable, holds
Easily cause equipment short circuit.The present embodiment technical scheme, not only increases the radiation-resistant property of parts, and depositing due to L elbow
, it is to avoid steam condensation easily enters connection member, causes the risk of short circuit.
In the present embodiment, the material of described guided wave cable 108 is 316L rustless steel, its decay resistance, oxidation resistent susceptibility, resistance to
The erosiveness of ocean and aggressive atmosphere is strong, and radiation resistance is excellent, has good thermostability and weldability.Guided wave cable
108 can survey the liquid level degree of depth reaches 8.5m, and the full-water level of covering Spent Fuel Pool, to the exposed water level of spentnuclear fuel, has precision height, antidetonation
The advantages such as performance is good, and resistance to irradiation ability is strong.
Described temperature-measuring module 12 is for detecting the temperature in Spent Fuel Pool.As shown in Figure 4, described temperature survey mould
Block 12 includes hygrosensor (not shown), armoured cable 107 and temperature transmitter (not shown).Described temperature probe is armouring platinum
Resistance temperature detector (RTD, Resistance Temperature Detector), is located at described weight 109, passes through armour
The temperature data that hygrosensor is collected by dress cable 107 exports to temperature transmitter, and described armoured cable 107 extends directly into
80m external signal processes the temperature transmitter in cabinet 21 and connects.Through temperature transmitter voltage regulation filtering, operation amplifier, non-linear school
Just, V/I conversion, after the processing of circuit such as constant current and reverse protection, it is converted into 4 with temperature line relationship～20mA current signal
Output is to long-range display case 31.Described temperature transmitter is arranged for integrated form with signal processing cabinet 21.
In the present embodiment, the insulant of armoured cable 107 is ceramic material, and resistance to irradiation and high-temperature behavior are excellent.This enforcement
In example, ceramic material use purity be not less than 99.5% aluminium oxide or purity be not less than 99.4% magnesium oxide, high pure zirconia
It is high that magnesium at high temperature has excellent electrical insulating property, thermal coefficient of expansion and thermal conductivity.
Temperature-measuring module 12 can survey 0～120 DEG C, precision ± 1.5 DEG C；Stability is high, and anti-seismic performance is good, the total agent of resistance to irradiation
Amount > 1MGy.
In the present embodiment, described guided wave cable 108 and armoured cable 107 are located in same plane, use a guided wave cable 108 and
Two armoured cables 107, in the purpose of do so is to avoid Spent Fuel Pool, boron crystallization produces the precision shadow for level gauging
Ring.Its reason is: when after the boron covering that the cross section in electromagnetic transmission space is all crystallized, can produce the extremely low of electromagnetic wave
Spurious echo signal.Only part of boron crystallization is attached on part cable then not interfere with radar level echo, i.e. will not produce
Raw liquid level spurious signal.Therefore, use three of the cables to be located in same plane, compared to single cable, can more effectively avoid
The generation of spurious echo signal.
As shown in Figure 4, in the present embodiment, described level gauging module 11 and temperature-measuring module 12 are located at the weary combustion of nuclear power station
Inside material pond, it is fixed by fixture.Concrete fixed structure is as follows: will by a mounting bracket 101 as shown in Figure 6
Level gauging module 11 and temperature-measuring module 12 are fixed on nuclear power station spent fuel reservoir top.Described mounting bracket 101 has one
The groove matched with nuclear power station spent fuel reservoir pool wall thickness, mounting bracket 101 is stuck in pool wall of pool by this groove, and leads to
Long screw bolt reinforcing, mounting bracket 101 material is 316L rustless steel, to the heavy dose of spoke under spentnuclear fuel Factory Building severe accident conditions
Penetrate insensitive, and identified by antidetonation I level.This mounting bracket 101 is also including a platform, described guided wave head towards side, pond
103 are threadably secured on ring flange 104, outside guided wave head 103, are additionally provided with a waterproof case 102, with to guided wave head
103 and electrical fitting protect.Described waterproof case 102 is fixed at guided wave head 103.At described platform and ring flange
The correspondence position of 104 is provided with through hole, guided wave cable 108 and armoured cable 107 and extends to nuclear power station spent fuel reservoir by this through hole
Liquid internal, described guided wave cable 108 is threaded connection and is fixed on guided wave head, and temperature armoured cable 107 is fixed by card cap 106
On ring flange 104.
In described guided wave cable 108 and the bottom of armoured cable 107, keep the vertical of cable by weight 109.At described weight
At 109, it is additionally provided with a buffer unit 110.It is illustrated in figure 7 the structural representation of buffer unit 110, including being respectively arranged on weight
109 tops and bottom, first, second bolster being fixed by press-in rivet 603.Described first bolster 601 is for expanding
Actinal surface structure, including umbrella-shaped structure or broadening formation structure.Second bolster 602 is the multiple bullets arranged along weight 109 circumference
Spring pad, all lead angles in base of described spring leaf, without corner angle or burr.
If because of drop-in guided wave cable 108 and armoured cable 107 crack conditions, according to force equation F*t=m*v (F table in formula
Showing that gravity forces, t represent the time of contact collided, m represents that quality, v represent the instantaneous velocity collided), first
Primarily serving the purpose of of bolster: reduce the instantaneous velocity v collided: set an enlarging face structure on weight top, has to increase
Effect sectional area, to increase whereabouts resistance, reduces whereabouts acceleration, thus realizes reducing the instantaneous velocity v collided.Second delays
Primarily serving the purpose of of stamping: increase t time of contact collided: be i.e. additionally arranged at the bottom spring shim at weight 109, extend weight
109 decline the action time bottomed out, and i.e. reduce impulsive force/impact force during contact.
Utilize simulation software that the modeling analysis result of buffer unit 110 is shown, in the case of not considering water resistance, weight
Hammer 109 collision area stress in falling process exceedes bottom it yield strength of spring shim, spring pad in the second bolster
Impulsive force is played buffering effect by sheet；After weight 109 is upspring, there are plastic deformation and residual stress in bottom surface, but diminishes, and reaches far away
To the tensile strength of material, it is not result in coal seam floor failure.The resistance that weight 109 top the first bolster increases, can subtract further
Little impulsive force, reduces the contact stress of weight 109 and base plate, is more not result in coal seam floor failure.
Further, at described ring flange 104, also fix suspension ring 105, acted on by mechanical arm (not shown)
Suspension ring 105, mention the effect of measurement apparatus during to realize position or the periodic inspection adjusting mounting bracket 101.
Signal processing cabinet 21 electrically connects with level gauging module 11 and temperature-measuring module 12 respectively, for being received
Liquid level signal and temperature signal carry out conversion process, carry out locally displayed, warning, and export 4-20mA master die analog quantity.Signal
Process cabinet 21 and be installed on the electric box at Spent Fuel Pool Factory Building areas outside staircase, be bolted on Factory Building wall
On, its structure meets antidetonation I class and identifies requirement.Thus, it is possible to the radioprotective of up to 500KGy in avoiding Spent Fuel Pool, it is ensured that
Monitoring safety.
That is, described signal processing cabinet 21 includes the main control chip being sequentially connected with, and respectively connected warning circuit,
Display circuit, storage chip and external interface.Described main control chip is for by level gauging module 11 and/or temperature-measuring module
The 4-20mA master die analog quantity electric current of 12 outputs is converted to corresponding temperature value or level value output；Warning circuit is for according to pre-
If liquid level, temperature alarming threshold value report to the police, when the liquid level that described main control chip identifies or temperature arrive alarm threshold value,
Just triggering warning, in the present embodiment, use 7 road SPDT48VDC/220AC relay outputs, wherein 4 tunnels are used for Spent Fuel Pool
Liquid level warning signal, 3 tunnels are used for Spent Fuel Pool heat alarm.Display circuit is for showing the liquid level that main control chip exports
Or temperature data, its display mode is that numeral continuously displays.Storage chip supports measurement data storage in 18 months and playback.Outside
Interface includes 1 road RS 485 communication interface, 1 road Ethernet interface, 1 tunnel USB interface, easy extension connecting equipment.
The Electro Magnetic Compatibility of signal processing cabinet 21 meets RG 1.180, IEC6100-4 series standard requirement；Seismic behavior is full
Foot antidetonation I class；Degree of protection reaches IP55.
It is also preferred that the left also include a stand-by power supply (not shown), for powering to whole monitoring device.Stand-by power supply uses intelligence
Energy power-supply management system, under normal circumstances, is on the one hand converted into 24VDC direct current by power current 220VAC thus is powered；Separately
On the one hand utilizing power current 220VAC is self accumulator charging, keeps accumulator as full power state with the moment.At power current
In the case of forfeiture, accumulator is cut automatically, it is ensured that system power supply is uninterrupted.Under normal circumstances, the confession of 72h at least can be provided
Electricity；If reducing sample frequency under severe accident conditions, then can provide the power supply of at least 7 days.
The nominal input voltage range of stand-by power supply: 100V AC～240V AC；Input voltage frequency range: 45Hz～
65Hz；Rated output voltage: 24V DC ± 1%；In losing factory, alternating current power supply is for seasonable, and stand-by power supply is cut automatically, it is ensured that
The systems stay monitoring operation time is more than 72h.
Remotely display case 31 receives, by signal cable, the signal that signal processing cabinet 21 is exported, thus remotely shows
Show.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model.In a word, all
Within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this practicality
Within novel protection domain.
Claims (10)
1. a nuclear power station spent fuel reservoir monitoring device, including level gauging module and temperature-measuring module, and respectively with
The signal processing cabinet of the two electrical connection and power cabinet, it is characterised in that:
Described level gauging module is positioned at nuclear power station spent fuel reservoir region, including: guided wave head, fixed by a mounting bracket
In nuclear power station spent fuel reservoir ullage；The guided wave cable of electrical connection below guided wave head, one end assembling one that it downwardly extends
Weight, extends to remote signaling in guided wave head upper end by radio frequency coaxial-cable and processes cabinet；
Described temperature-measuring module is positioned at nuclear power station spent fuel reservoir region, including: in the armouring that described mounting bracket is fixing
Cable, armoured cable downwardly extends electrical connection and is fixed on the hygrosensor at described weight；Described armoured cable upper end extends to signal
Process cabinet；
Described signal processing cabinet is located at outside nuclear power station spent fuel reservoir region, includes at least: guided wave head liquid level signal processor, temperature
Degree transmitter, storage device and display device.
Device the most according to claim 1, it is characterised in that described weight top is provided with the first buffer unit, its cincture
Described weight stretches out in umbrella-shaped structure.
Device the most according to claim 2, it is characterised in that described in the peripheral bead that extends outward arrange.
Device the most according to claim 1, it is characterised in that described weight bottom is provided with the second buffer unit, including: set
Bottom weight, the spring shim that multiple bases are lead angle arranged along weight circumference.
Device the most according to claim 1, it is characterised in that described mounting bracket one end is provided with one and Nuclear Power Station's Exhausted Fuels
The groove that basin side wall thickness matches, is used for blocking nuclear power station spent fuel reservoir sidewall；The other end includes a platform, described in lead
Wave head is fixed on described platform by ring flange.
Device the most according to claim 5, it is characterised in that described guided wave head periphery arranges a housing, described housing with
Guided wave head is fixed, and guided wave head is threadably secured on described ring flange, and ring flange is secured by bolts on described platform.
Device the most according to claim 5, it is characterised in that described guided wave cable and described armoured cable are located at same plane
In, described guided wave cable is threaded connection and is fixed on guided wave head, and guided wave head is threadably secured on described ring flange, armouring
Cable is fixed on described ring flange by card cap.
Device the most according to claim 1, it is characterised in that between described guided wave head and described radio frequency coaxial-cable,
Also include bilateral radio-frequency maser and L-type connecting bend；
Between described bilateral radio-frequency maser and L-type connecting bend, also include silicone rubber seal layer.
Device the most according to claim 1, it is characterised in that the insulant of each parts of described level gauging module is equal
For polyether-ether-ketone.
Device the most according to claim 1, it is characterised in that the insulant in described armoured cable includes that purity is the lowest
Aluminium oxide in 99.5% or purity are not less than the magnesium oxide of 99.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620716525.XU CN205810387U (en) | 2016-07-07 | 2016-07-07 | A kind of nuclear power station spent fuel reservoir monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620716525.XU CN205810387U (en) | 2016-07-07 | 2016-07-07 | A kind of nuclear power station spent fuel reservoir monitoring device |
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| Publication Number | Publication Date |
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| CN205810387U true CN205810387U (en) | 2016-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105957569A (en) * | 2016-07-07 | 2016-09-21 | 中广核研究院有限公司北京分公司 | Monitoring device of nuclear power plant spent fuel pool |
| CN107063390A (en) * | 2016-12-30 | 2017-08-18 | 上海自动化仪表有限公司 | Flexibility extension radar levelmeter |
-
2016
- 2016-07-07 CN CN201620716525.XU patent/CN205810387U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105957569A (en) * | 2016-07-07 | 2016-09-21 | 中广核研究院有限公司北京分公司 | Monitoring device of nuclear power plant spent fuel pool |
| CN107063390A (en) * | 2016-12-30 | 2017-08-18 | 上海自动化仪表有限公司 | Flexibility extension radar levelmeter |
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