CN105957569B - 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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- CN105957569B CN105957569B CN201610534063.4A CN201610534063A CN105957569B CN 105957569 B CN105957569 B CN 105957569B CN 201610534063 A CN201610534063 A CN 201610534063A CN 105957569 B CN105957569 B CN 105957569B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/035—Moderator- or coolant-level detecting devices
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
- G21C17/112—Measuring temperature
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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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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Nuclear power station spent fuel reservoir monitoring device provided by the invention includes level gauging module and temperature-measuring module, and the signal transacting cabinet and power cabinet electrically connected respectively with the two, level gauging module includes：Guided wave head, nuclear power station spent fuel reservoir ullage is fixed on by a mounting bracket；A weight is assembled in the guided wave cable of electrical connection below guided wave head, its one end extended downwardly；The temperature-measuring module includes：In the armoured cable that the mounting bracket is fixed, armoured cable extends downwardly the hygrosensor that electrical connection is fixed at the weight；Armoured cable upper end extends to one temperature transmitter of distal end electrical connection；Signal transacting cabinet electrically connects outside nuclear power station spent fuel reservoir region with the guided wave head and temperature transmitter.Device obtains the liquid level and state of temperature in Spent Fuel Pool, electronic unit is no longer influenced by nuclear radiation interference, to the risk progress being likely to occur and alarm, to prevent potential safety hazard by the metering system of long-range pick-up.
Description
Technical field
The present invention relates to nuclear safety technical field, more 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, will after a cycle of operation of reactor terminates
The irradiated fuel assembly of about 1/3 reactor core in heap is discharged in Spent Fuel Pool and cooled down.The irradiated fuel assembly just drawn off have compared with
High decay heat, after being cooled down for many years in pond, decay heat, which drops to, sufficiently low can just be transported to reprocessing plant or permanent
Store field.To ensure the normal cooling of spentnuclear fuel, the water in weary pond must be sufficient.Fukushima core occurs in March, 2011, Japan
Accident.According to feedback, after Fukushima nuclear power station beyond design basis accident, Spent Fuel Pool, which is lost, normally cools down, in Spent Fuel Pool
Decay heat is taken away by evaporation, the boiling of water, so as to cause the rapid decrease of pond liquid level.Other pond liners and and water
The connected pipeline in pond it can also happen that cut and cause the decline of pond liquid level, due to the water-level and water-temperature without function of seismic resistance in weary pond
Monitoring device, its water level degradation is not known but, 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.
A kind of Split ultrasonic level meters of Publication No. CN204064399U, by Split ultrasonic level meter main frame and
Ultrasonic probe is formed, and carrying out signal using digital form between Split ultrasonic level meter main frame and ultrasonic probe leads to
Believe, the transmitting driving electronic unit of driving ultrasonic transducer work is included inside ultrasonic probe, for receiving echo letter
Number echo signal processing electronic unit and control the single-chip microcomputers of two cell operations, the ultrasonic wave transducer inside ultrasonic probe
The single transducer that device is unified for transmitting-receiving.As shown in figure 1, contain single-chip microcomputer, driving in the ultrasonic probe being installed in measurement tank
The device such as the integrated circuit such as unit and signal receiving unit and amplifier, such electronic component is extremely sensitive to nuclear radiation, typically
It is only capable of bearing maximum 100Gy radiation intergal dose, and the nuclear radiation of nuclear power spent fuel top can reach under extreme conditions
Nearly 500KGy, the guided wave radar material level gauge measuring system will soon fail after in-site installation.In addition, the patent also exist it is following
Defect：
1st, ultrasonic wave is mechanical wave, and because sound wave will lean on vibration sounding, sound-generating element is impacted when environmental pressure is big；And it is passed
Broadcast that the state of speed and communication media is closely related, therefore impacted condition (temperature, pressure etc.) is more；
2nd, ultrasonic frequency is generally tens of thousands of hertz, therefore its penetration capacity is poor, and in signals transmission, decay is larger,
Faint echo-signal makes signal receiving processing system amplify it by that can produce larger decay during longer signal cable
Identification is difficult；
3rd, ultrasonic echo signal is easily adulterated excessive noise, extraneous strong electromagnetic interference by outside electromagnetic interference
Noise may also flood faint echo-signal, cause the None- identified of echo or amplify noise, form the measured value of mistake；
4th, ultrasonic level gage may not apply to that vacuum, steam content are too high or liquid level has the operating modes such as foam.
In addition, Publication No. CN204101129U guided wave radar material level gauge systems be it is a kind of be used for determine be contained in tank
The guided wave radar material level gauge system of the filler position of article, the system include：Tank, it has inwall, top and bottom；Transmitting-receiving
Device, for launching Electromagnetic Launching signal and receiving the reflected electromagnetic signal reflected at the surface of article；Surface duct, it includes
Single conductor transmission line probe, surface duct is connected to transceiver, is arranged to and extends in tank vertically and be configured to direction
Reflected electromagnetic signal guiding is simultaneously returned to transceiver by surface direct electromagnetic transmission signal；Process circuit, it is connected to transceiver simultaneously
It is configured to determine filler position based on the reflected electromagnetic signal received；And multiple holding elements, it, which is arranged to, is located at
On being opened in the fixed position of the inside of tank and along probe separation, wherein, each restriction probe in holding element, and by with
Being set to allows probe relative to holding element in the vertical direction movement and limits probe relative to the holding element in water
Square move up.
As shown in Fig. 2 equally contain the integrated circuit devices such as microprocessor, transmitter/receiver at the top of tested measuring tank
Part, such electronic component is extremely sensitive to nuclear radiation, is typically only capable of bearing maximum 100Gy radiation intergal dose, and nuclear power
The nuclear radiation of Spent Fuel Pool top can reach nearly 500KGy under extreme conditions, and the guided wave radar material level gauge measures after in-site installation
System will soon fail.
The content of the invention
In view of this, it is a primary object of the present invention to, there is provided a kind of nuclear power station spent fuel reservoir monitoring device, including liquid
Position measurement module and temperature-measuring module, and the signal processor electrically connected respectively with the two.The level gauging module position
In in nuclear power station spent fuel reservoir region, including：Guided wave head, nuclear power station spent fuel reservoir liquid level is fixed on by a mounting bracket
Top；The guided wave cable of electrical connection below guided wave head, its one end extended downwardly are assembled a weight, passed through in guided wave head upper end same
Shaft cable extends to remote signaling processor；
The temperature-measuring module is located in nuclear power station spent fuel reservoir region, including：Fixed in the mounting bracket
Armoured cable, armoured cable extend downwardly the hygrosensor that electrical connection is fixed at the weight；The armoured cable upper end extends to
Signal processor；
The signal processor comprises at least in the rack outside nuclear power station spent fuel reservoir region：Guided wave first liquid position
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 remote
The metering system of journey pick-up, the electronic unit sensitive to nuclear radiation is set to be no longer influenced by radiation interference；Monitoring device obtains weary in real time
Liquid level and state of temperature in fuel pit, to the risk progress being likely to occur and alarm, so as to prevent potential safety hazard.
Optionally, the weight top is provided with the first buffer unit, and it stretches out in umbrella-shaped structure around the weight.
Optionally, the peripheral bead extended outward is set.
By upper, by increasing net sectional area, to increase whereabouts resistance, whereabouts acceleration is reduced, hair is reduced so as to realize
The instantaneous velocity of raw collision.
Optionally, the weight bottom is provided with the second buffer unit, including：Located at weight bottom, set along weight circumference
Multiple bases be lead angle spring shim.
By upper, compared to the pad being wholely set, single pad forms circumference, can in weight and contacts baseplate moment
With according to contact position stress, so as to further increase time of contact.
Optionally, described mounting bracket one end is provided with a groove to match with nuclear power station spent fuel reservoir sidewall thickness,
For card and nuclear power station spent fuel reservoir side wall；The other end includes a platform, and the guided wave head is fixed on described by ring flange
On platform.
By upper, the fixation for level gauging module and temperature-measuring module is realized by the mounting bracket, to realize
Guided wave cable and temperature-measuring element to liquid level in Spent Fuel Pool, temperature measurement and need not be punched in Spent Fuel Pool inwall
Installation, ensure that the integrality of Spent Fuel Pool inwall.
Optionally, the guided wave head is fixed on the ring flange, and its periphery sets a dust-and-water proof casing, described dust-proof
Waterproof case is fixed with guided wave head, is fixed on by means of ring flange on the platform.
By upper, housing realizes the protection for guided wave head and electric connector.
Optionally, in same plane, guided wave cable, which is connected through a screw thread, to be fixed on for the guided wave cable and the armoured cable
On guided wave head, armoured cable is fixed on the ring flange by card cap.
After the boron that the cross section in electromagnetic transmission space is all crystallized covers, extremely low false time of electromagnetic wave can be produced
Ripple signal, and only part of boron crystallization is attached on the cable of part and does not interfere with radar level echo then, i.e., will not produce liquid level
Spurious signal.Therefore, using three cables in same plane, compared to single cable, false return can more effectively be avoided
The generation of ripple signal.
Optionally, between the guided wave head and the radio frequency coaxial-cable, in addition to bilateral radio-frequency maser and L-type connecting bending
Head.
By upper, in-site installation space is not only greatly reduced, and avoids steam condensation and easily enters connection member, is caused
The risk of short circuit.
Optionally, the insulating materials of the level gauging module is polyether-ether-ketone.
Optionally, the insulating materials in the armoured cable includes aluminum oxide of the purity not less than 99.5% or purity is not less than
99.4% magnesia.
By upper, it is possible to achieve all parts outside the pond positioned in spentnuclear fuel factory building can tolerate 500KGy core spoke
Dosage is penetrated, the part in pond can tolerate 1000KGy nuclear radiation dosage.
Brief description of the drawings
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 nuclear power station spent fuel reservoir monitoring device of the present invention；
Fig. 4 is the mounting structure schematic diagram of nuclear power station spent fuel reservoir monitoring device of the present invention；
Fig. 5 (A) is the connection diagram of prior art guided wave head and coaxial cable；
Fig. 5 (B) is the connection diagram of guided wave head of the present invention and coaxial cable；
Fig. 6 is the structural representation of mounting bracket in nuclear power station spent fuel reservoir monitoring device of the present invention；
Fig. 7 is the structural representation of buffer unit in nuclear power station spent fuel reservoir monitoring device of the present invention.
Embodiment
The defects of to overcome prior art to exist, the present invention provide a kind of nuclear power station spent fuel reservoir monitoring device, installation
Inside Spent Fuel Pool, by the metering system of long-range pick-up, the liquid level and state of temperature in Spent Fuel Pool are obtained, it is right
The risk being likely to occur carries out and alarm, to prevent 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 transacting cabinet 21 electrically connected respectively with the two, in addition to the signal transacting cabinet
The long-range display case 31 of 21 connections.
The level gauging module 11 is used for the liquid level depth for detecting Spent Fuel Pool.As shown in figure 4, the level gauging
Module 11 includes guided wave first 103, guided wave cable 108 and weight 109, and the weight 109 is used to keep guided wave cable 108 vertical.Also wrap
Include the liquid level signal processor (not shown) of distal end, the liquid level signal processor by the coaxial cable of resistance to nuclear radiation over long distances with
The guided wave first 103 electrically connects, in signal transacting cabinet 21.
The operation principle of level gauging module 11 is：Liquid level signal processor controls the electromagnetic wave that tranmitting frequency is 200M to believe
Number, the signal transmits through the coaxial cable of resistance to nuclear radiation over long distances, through guided wave first 103 along the surface of guided wave cable 108 and both sides temperature line
The spatial that cable is formed, when the signal runs into air with water interface, a reflected signal is produced, the reflected signal passes through guided wave
Cable 108, guided wave first 103 is propagated, then is exported by the radiotolerant coaxial cable of the long range to liquid level signal processor, by liquid
The liquid level signal that reflected signal is converted into 4~20mA by position signal processor be locally displayed simultaneously teletransmission to long-range display case
31。
In the present embodiment, each part insulating materials in the inside of level gauging module 11 is polyether-ether-ketone resin (PEEK), should
The insulating materials that insulate is a kind of special engineering plastics of excellent performance, is had compared with other special engineering plastics more significantly excellent
Gesture, resistance to positive 260 degree of high temperature, mechanical performance is excellent, self lubricity is good, chemicals-resistant burn into is fire-retardant, peel resistance, wearability, anti-
Radiation.
The coaxial cable is the low attenuating RF coaxial cable of tolerable 500KGy radiation, and farthest transmission range is 80m,
Simultaneously the coaxial cable can under the conditions of 100 DEG C, 100%RH high-temperature vapor normal work.Further, such as Fig. 5 (B) institute
Show, in the present embodiment, L-type connecting bend, the bilateral radio-frequency maser and L are provided between bilateral radio-frequency maser and the coaxial cable
The polyether-ether-ketone resin insulating materials and the encapsulant of silicon rubber that type connecting bend is provided with, it 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：
The bilateral radio-frequency maser interior insulation material in industry is not resistant to high dose radiation at present, and wherein one end is direct
Connecting coaxial cable, so that under conditions of hot and humid, steam condensation can be flowed into bilateral radio-frequency maser along coaxial cable, held
Easily cause equipment short-circuit.The present embodiment technical scheme, not only increase the radiation-resistant property of part, and depositing due to L elbows
Avoid steam condensation and easily entering connection member, cause the risk of short circuit.
In the present embodiment, the material of the guided wave cable 108 is 316L stainless steels, its decay resistance, oxidation resistent susceptibility, resistance to
The erosiveness of ocean and aggressive atmosphere is strong, and radiation resistance is excellent, has good heat resistance and weldability.Guided wave cable
108, which can survey liquid level depth, reaches 8.5m, covers the full-water level of Spent Fuel Pool to the exposed water level of spentnuclear fuel, has precision height, antidetonation
The advantages that performance is good, and resistance to irradiation ability is strong.
The temperature-measuring module 12 is used to detect the temperature in Spent Fuel Pool.As shown in figure 4, the temperature survey mould
Block 12 includes hygrosensor (not shown), armoured cable 107 and temperature transmitter (not shown).The temp probe is armouring platinum
Resistance temperature detector (RTD, Resistance Temperature Detector), at the weight 109, passes through armour
The temperature data that dress cable 107 is collected hygrosensor is exported to temperature transmitter, and the armoured cable 107 extends directly into
Temperature transmitter connection in 80m external signals processing cabinet 21.By temperature transmitter voltage regulation filtering, operation amplifier, non-linear school
Just, after the processing of circuit such as V/I conversions, constant current and reverse protection, 4~20mA current signals with temperature line relationship are converted into
Export to long-range display case 31.The temperature transmitter is set with signal transacting cabinet 21 for integrated form.
In the present embodiment, the insulating materials of armoured cable 107 is ceramic material, and resistance to irradiation and high-temperature behavior are excellent.This implementation
In example, ceramic material is not less than 99.4% magnesia, high pure zirconia using aluminum oxide of the purity not less than 99.5% or purity
Magnesium has excellent electrical insulating property at high temperature, and thermal coefficient of expansion and thermal conductivity are high.
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 resistance to total agent of irradiation
Amount>1MGy.
In the present embodiment, the guided wave cable 108 and armoured cable 107 in the same plane, using a guided wave cable 108 and
Two armoured cables 107, the purpose so done are to avoid boron in Spent Fuel Pool to crystallize the precision shadow produced for level gauging
Ring.Its reason is：After the boron that the cross section in electromagnetic transmission space is all crystallized covers, the extremely low of electromagnetic wave can be produced
Spurious echo signal.And only part of boron crystallization is attached on the cable of part and does not interfere with radar level echo then, i.e., will not produce
Raw liquid level spurious signal.Therefore, compared to single cable, can more effectively be avoided in same plane using three cables
The generation of spurious echo signal.
As shown in figure 4, in the present embodiment, the level gauging module 11 and temperature-measuring module 12 are located at the weary combustion of nuclear power station
Expect inside pond, be fixed by fixture.Specific 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.The mounting bracket 101 has one
The groove to match with nuclear power station spent fuel reservoir pool wall thickness, mounting bracket 101 is stuck in pool wall of pool by the groove, and leads to
Long screw bolt reinforcing, the material of mounting bracket 101 is 316L stainless steels, to heavy dose of spoke under spentnuclear fuel factory building severe accident conditions
Penetrate it is insensitive, and pass through antidetonation I levels identify.The mounting bracket 101 is also including a platform, the guided wave head towards pond side
103 are threadably secured on ring flange 104, outside guided wave first 103, a waterproof case 102 are additionally provided with, with to guided wave head
103 and electrical fitting protected.The waterproof case 102 is fixed at guided wave first 103.In the platform and ring flange
104 correspondence position is provided with through hole, and guided wave cable 108 and armoured cable 107 extend to nuclear power station spent fuel reservoir by the through hole
Liquid internal, the guided wave cable 108, which is connected through a screw thread, to be fixed on guided wave head, and temperature armoured cable 107 is fixed by card cap 106
In on ring flange 104.
In the bottom of the guided wave cable 108 and armoured cable 107, the vertical of cable is kept by weight 109.In the weight
At 109, a buffer unit 110 is additionally provided with.The structural representation of buffer unit 110 is illustrated in figure 7, including is respectively arranged on weight
109 top and bottom, first, second bolster being fixed by being pressed into rivet 603.First bolster 601 is expansion
Mouth face structure, including umbrella-shaped structure or broadening formation structure.Second bolster 602 is the multiple bullets set along the circumference of weight 109
Spring pad, all lead angles in base of the spring leaf, no corner angle or burr.
If because of drop-in guided wave cable 108 and the crack conditions of armoured cable 107, according to force equation Ft=mv (F in formula
Gravity forces are represented, t represents the time of contact to collide, and m represents quality, and v represents the time of contact to collide, m tables
Show quality, v represents the instantaneous velocity to collide), the main function of the first bolster is：Reduce the instantaneous velocity to collide
v：An enlarging face structure is set on weight top, to increase net sectional area, to increase whereabouts resistance, reduces whereabouts acceleration, from
And realizing reduces the instantaneous velocity v to collide.The main function of second bolster is：Increase the time of contact t to collide：
Spring shim is additionally arranged at the bottom in weight 109, extends weight 109 and declines the action time bottomed out, that is, reduce impact during contact
Power/impact.
The modeling analysis result of buffer unit 110 is shown using simulation software, in the case where not considering water resistance, weight
The collision area stress in falling process of hammer 109 exceedes the yield strength of spring shim in its bolster of bottom second, spring pad
Piece plays buffering effect to impulsive force；After weight 109 is upspring, there are plastic deformation and residual stress in bottom surface, but has diminished, and reaches far away
To the tensile strength of material, coal seam floor failure will not be caused.The top of the weight 109 increased resistance of first bolster, can further subtract
Small impulsive force, the contact stress of weight 109 and bottom plate is reduced, will not more cause coal seam floor failure.
Further, a suspension ring 105 are also fixed at the ring flange 104, are acted on by mechanical arm (not shown)
Suspension ring 105, to realize the effect for lifting measurement apparatus when the position or the periodic inspection that adjust mounting bracket 101.
Signal transacting cabinet 21 electrically connects with level gauging module 11 and temperature-measuring module 12 respectively, for that will be received
Liquid level signal and temperature signal carry out conversion process, are locally displayed, alarmed, and export 4-20mA master die analog quantity.Signal
Processing cabinet 21 is installed on the electric box at Spent Fuel Pool factory building areas outside staircase, is bolted on factory building wall
On, its structure meets that the identification of antidetonation I classes requires.Thus, it is possible to avoid up to 500KGy nuclear radiation in Spent Fuel Pool, ensure
Monitoring safety.
That is, described signal transacting cabinet 21 includes the main control chip that is sequentially connected, and respectively connected warning circuit,
Display circuit, storage chip and external interface.The main control chip is used for level gauging module 11 and/or temperature-measuring module
The 4-20mA master die analog quantity electric currents of 12 outputs are converted to corresponding temperature value or level value output；Warning circuit is used for according to pre-
If liquid level, temperature alarming threshold value alarmed, when liquid level or temperature that the main control chip identifies reach alarm threshold value,
Just triggering is alarmed, in the present embodiment, using No. 7 relays outputs, wherein 4 tunnels are used for Spent Fuel Pool liquid level warning signal, 3 tunnels
For Spent Fuel Pool heat alarm.Display circuit is used for the liquid level or temperature data for showing main control chip output, and it is aobvious
Show that mode continuously displays for numeral.Storage chip supports measurement data storage in 18 months and playback.External interface includes 1 road RS
485 communication interfaces, 1 road Ethernet interfaces, 1 road USB interface, easy extension connecting equipment.
The Electro Magnetic Compatibility of signal transacting cabinet 21 meets RG 1.180, IEC6100-4 series standard requirements；Seismic behavior is expired
Sufficient antidetonation I classes；Degree of protection reaches IP55.
Preferably, also include a stand-by power supply (not shown), for being powered 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 currents so as to be powered by power electric 220VAC；Separately
On the one hand it is that the battery of itself charges using power electric 220VAC, to keep battery constantly as full power state.In power electric
In the case of forfeiture, battery is cut automatically, ensures that system power supply is uninterrupted.Under normal circumstances, 72h confession can be at least provided
Electricity；If reducing sample frequency under severe accident conditions, the power supply of at least 7 days can be provided.
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%；When losing AC power supply in factory, stand-by power supply is cut automatically, is ensured
Systems stay monitoring run time is more than 72h.
The signal that long-range display case 31 is exported by signal cable reception signal processing cabinet 21, so as to remotely be shown
Show.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention.In a word, it is all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvements made etc., should be included in protection scope of the present invention it
It is interior.
Claims (7)
1. a kind of nuclear power station spent fuel reservoir monitoring device, including level gauging module and temperature-measuring module, and respectively with
The signal transacting cabinet and power cabinet of the two electrical connection, it is characterised in that：
The level gauging module is located in 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, its one end extended downwardly assembling one
Weight, remote signaling is extended to by radio frequency coaxial-cable in guided wave head upper end and handles cabinet；
The temperature-measuring module is located in nuclear power station spent fuel reservoir region, including：In the armouring that the mounting bracket is fixed
Cable, armoured cable extend downwardly the hygrosensor that electrical connection is fixed at the weight；The armoured cable upper end extends to signal
Handle cabinet；
The signal transacting cabinet comprises at least outside nuclear power station spent fuel reservoir region：Guided wave first liquid position signal processor, temperature
Spend transmitter, storage device and display device；
The weight top is provided with the first buffer unit, and it stretches out in umbrella-shaped structure around the weight；
The peripheral bead extended outward is set；
The weight bottom is provided with the second buffer unit, including：Located at weight bottom, the multiple bases set along weight circumference are
The spring shim of lead angle.
2. device 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, for blocking nuclear power station spent fuel reservoir side wall；The other end includes a platform, described to lead
Wave head is fixed on the platform by ring flange.
3. device according to claim 2, it is characterised in that guided wave head periphery sets a housing, the housing with
Guided wave head is fixed, and guided wave head is threadably secured on the ring flange, and ring flange is secured by bolts on the platform.
4. device according to claim 2, it is characterised in that the guided wave cable and the armoured cable are located at same plane
Interior, the guided wave cable, which is connected through a screw thread, to be fixed on guided wave head, and guided wave head is threadably secured on the ring flange, armouring
Cable is fixed on the ring flange by card cap.
5. device according to claim 1, it is characterised in that between the guided wave head and the radio frequency coaxial-cable,
Also include bilateral radio-frequency maser and L-type connecting bend；
Between the bilateral radio-frequency maser and L-type connecting bend, in addition to silicone rubber seal layer.
6. device according to claim 1, it is characterised in that the insulating materials of each part of the level gauging module is equal
For polyether-ether-ketone.
7. device according to claim 1, it is characterised in that the insulating materials in the armoured cable is not less than including purity
99.5% aluminum oxide or purity is not less than 99.4% magnesia.
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| CN201610534063.4A CN105957569B (en) | 2016-07-07 | 2016-07-07 | A kind of nuclear power station spent fuel reservoir monitoring device |
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| CN201610534063.4A CN105957569B (en) | 2016-07-07 | 2016-07-07 | A kind of nuclear power station spent fuel reservoir monitoring device |
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| CN108225481A (en) * | 2016-12-09 | 2018-06-29 | 国核华清（北京）核电技术研发中心有限公司 | Spent Fuel Pool level monitoring system and method under a kind of more operating conditions |
| CN109903864B (en) * | 2019-03-28 | 2020-08-28 | 三门核电有限公司 | Stack cavity area temperature measuring device and stack cavity area temperature measuring method |
| CN110346016B (en) * | 2019-08-14 | 2024-07-30 | 中广核研究院有限公司北京分公司 | Anti-radiation guided wave radar level gauge |
| CN110853781B (en) * | 2019-10-24 | 2021-12-03 | 中广核工程有限公司 | Comprehensive monitoring system and method for spent fuel pool of nuclear power station |
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| CN202195856U (en) * | 2011-07-14 | 2012-04-18 | 南京乌江化工有限公司 | Anti-interference device applied to radar liquid level meter |
| JP5787729B2 (en) * | 2011-11-14 | 2015-09-30 | 株式会社東芝 | Water level temperature measuring device |
| US9541443B2 (en) * | 2013-12-23 | 2017-01-10 | Rosemount Tank Radar Ab | Guided wave radar level gauging with probe retaining element |
| CN104575640A (en) * | 2014-12-11 | 2015-04-29 | 中国核电工程有限公司 | Spent fuel water tank liquid level and temperature measuring device |
| CN205810387U (en) * | 2016-07-07 | 2016-12-14 | 中广核研究院有限公司北京分公司 | A kind of nuclear power station spent fuel reservoir monitoring device |
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2016
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