CN108447573B - A kind of nuclear reactor fuel rod fusing visual experimental apparatus and method - Google Patents
A kind of nuclear reactor fuel rod fusing visual experimental apparatus and method Download PDFInfo
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- CN108447573B CN108447573B CN201810338609.8A CN201810338609A CN108447573B CN 108447573 B CN108447573 B CN 108447573B CN 201810338609 A CN201810338609 A CN 201810338609A CN 108447573 B CN108447573 B CN 108447573B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/08—Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
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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
Abstract
A kind of nuclear reactor fuel rod fusing visual experimental apparatus and method, high temperature smelting furnace including having several saturating windows, testpieces is vertically arranged in high temperature smelting furnace, the top and bottom of testpieces are respectively arranged with rhenium molybdenum electrode, rhenium molybdenum electrode is by testpieces, rhenium molybdenum electrode is connected with the copper electrode for passing through high-temperature fusion furnace sidewall, testpieces includes fuel rod, it is provided with W-Re heating rod in fuel rod, is provided on the outside of high temperature smelting furnace for carrying out cooling cooling water recirculation system to high temperature smelting furnace.The present invention guarantees that furnace body temperature outside is maintained within security restriction by high temperature smelting furnace cooling water recirculation system, and external high-speed camera instrument can work normally, being capable of core melt progression under the conditions of real simulation reactor disaster.The experimental data that the present invention obtains can provide verifying for conventional numeric analogy method, reduce the uncertainty of existing Analysis Codes of Severe Accident.
Description
Technical field
The present invention relates to visual experimental apparatus under severe accident conditions and methods, and in particular to a kind of nuclear reactor fuel
Stick melts visual experimental apparatus and method, belongs to experiment measurement method for visualizing field.
Background technique
Material can be fused into liquid in the case where reaching itself fusing point in the heap of reactor.And different materials are total to
Brilliant effect can then further decrease this fusion temperature.These reactor core material fusant can be by flowing downward, into reactor
The lower position in reactor core horizontal position, and the area for having certain probability that can cause reactor coolant runner reduces.And it is adjoint
Major accident further develop, core melt continue is accumulated in coolant flow passages, will lead to part of fuel inter-module
Runner in cause blockages, it can be such that Core cooling ability further declines, and reactor disaster is made to continue to deteriorate.Such as
If fruit cannot be alleviated, it is most likely that occur local burn through inside reactor, and lead to the reactor structure on entire top
It collapses, the melting range of further expansion reactor core.Therefore, fuel rod fusing and fusant migrate row process under severe accident conditions
Phenomena such as metal material eutectic phenomena of middle generation, involucrum oxidation, fracture behaviour, fusant is jammed, is in major accident sequence
Important link provides source item for reactor disaster process inside and outside subsequent heap.If therefore can be taken during fuel rod melts
Timely the harm of the weakening major accident of high degree is reduced the security of the lives and property of the public by accident mitigation measure.But
Reactor core fusing is a kind of non-linear non-coherent complicated physical chemical phenomenon under high-temperature and high-pressure conditions.This makes phenomenon
Research and analysis is very difficult, and traditional Analysis Codes of Severe Accident simulation faces huge challenge in this regard.Because existing
Device in can not observe the detailed process and phenomenon of fuel rod fusing inside reactor, cause existing major accident to be analyzed
Program is only capable of carrying out sunykatuib analysis to macroscopical lumped parameter, can not accurate description major accident process and mechanism.
Summary of the invention
To solve the above problems, the object of the present invention is to provide a kind of nuclear reactor fuel rods to melt visual experimental apparatus
And method.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of nuclear reactor fuel rod fusing visual experimental apparatus, the high temperature smelting furnace including having several saturating windows,
Testpieces is vertically arranged in high temperature smelting furnace, the top and bottom of testpieces are respectively arranged with rhenium molybdenum electrode, and rhenium molybdenum electrode will
Testpieces, rhenium molybdenum electrode are connected with the copper electrode for passing through high-temperature fusion furnace sidewall, and testpieces includes fuel rod, setting in fuel rod
There is W-Re heating rod, is provided on the outside of high temperature smelting furnace for carrying out cooling cooling water recirculation system to high temperature smelting furnace.
A further improvement of the present invention lies in that being provided with bell at the top of high temperature smelting furnace, bottom is provided with lower bell,
Upper bell is connected with hydraulic press, and lower bell is connected with fork truck, and upper bell is controlled by hydraulic press and gone up and down, and lower bell is controlled by fork truck and risen
Drop.
A further improvement of the present invention lies in that being provided with crucible below fuel rod, crucible is arranged on lower bell；Across height
Temperature melting furnace sidewall, is provided with 6 Wolfram rhenium heat electric couples in different height, for measuring the temperature of fuel rod.
A further improvement of the present invention lies in that 6 saturating windows are offered on the sidewall of the furnace body of high temperature smelting furnace, 6 saturating windowsills
Sidewall of the furnace body spiral escalation arrangement, is uniformly distributed in the circumferential.
A further improvement of the present invention lies in that two neighboring window is 0.16m in the distance of vertical direction；Saturating window is in rotary table
Type, the diameter of the top surface opening of saturating window are 25mm, and the diameter at bottom opening is 74mm.
A further improvement of the present invention lies in that being provided with circular cover, circular lid in high-temperature fusion furnace sidewall at saturating window
It is provided with quartz glass between on plate and high-temperature fusion furnace sidewall, offers circular hole in circular cover.
A further improvement of the present invention lies in that circular cover is fixed by screws on the side wall of high temperature smelting furnace, quartz
Glass be it is cylindric, O-ring seal is provided between circular cover and quartz glass 9, is provided with square on the side wall of quartz glass
Shape sealing ring.
A further improvement of the present invention lies in that the diameter of quartz glass is 40mm.
A further improvement of the present invention lies in that cooling water recirculation system includes water tank, pipeline, high temperature are provided on upper bell
It is provided with pipeline on melting sidewall of the furnace body, pipeline is provided on lower bell, is provided with pipeline on copper electrode；Tank outlet and water pump
Entrance be connected, exit of pump is connected with No. five water segregators, No. five water segregators export respectively with entrance, the height on upper bell
Entrance, the entrance on lower bell, the entrance on copper electrode and Roots on temperature melting sidewall of the furnace body are pumped into
Mouth is connected, the pipe outlet on upper bell, the pipe outlet on high-temperature fusion sidewall of the furnace body, the pipe outlet on lower bell, copper
Pipe outlet and Roots's pump discharge on electrode are connected with water collector entrance, and water collector outlet is connected with tank entry；Water
It is provided with water-level gauge in case, is provided with cooling tower above water tank, elevator pump is provided in water tank, promotes pump discharge and cooling tower phase
Even.
A kind of experimental method opens feed pump and elevator pump, and feed pump is located at Bing Yu No. five water segregator outside water tank and is connected,
Corresponding experimental facilities, the cooling corresponding experimental facilities of cooling water will be flowed to respectively after cooling water Song Zhi No. five water segregator in water tank
After converge in water collector, water collector is connected with water tank, the final reflow tank of cooling water；Elevator pump is located at water tank bottom, by water
Water in case is promoted to the cooling tower of eminence, and cooling water is flow back into water tank after air is cooling；Then to high temperature smelting furnace
Inside vacuumize, when in high temperature smelting furnace vacuum degree reach setting value after be passed through argon gas, argon gas is passed through from furnace bottom to high temperature smelting furnace
Interior until high-temperature fusion furnace pressure reaches 1.2MPa, alternating current passes through water cooling copper electrode and rhenium molybdenum electrode, flows into W-Re heating
Stick is electrically heated fuel rod；High-speed camera instrument is through the saturating window captured in real-time furnace internal combustion charge bar fusing in furnace wall and migrating tendency mistake
Journey simultaneously saves, and Wolfram rhenium heat electric couple measures the temperature of fuel rod outer surface zirconium -4 alloy and preservation.
Compared with prior art, the invention has the following advantages:
By opening up window on high temperature smelting furnace high-speed camera can be arranged outside window in experimental provision of the invention thoroughly
Instrument observes experimental conditions in high temperature smelting furnace by high-speed camera instrument, and fuel rod fusing can not be observed by overcoming in existing apparatus
Detailed process the problem of, due to outside furnace with the presence of high-speed camera instrument, it is therefore desirable to entire experimental provision is cooled down.Therefore
Cooling water recirculation system is additionally arranged in the present invention, experimental provision structure of the invention is simple, can be realized, and can visually take off
That shows core material melts and fusant migrates transient performance characteristic, and obtaining visual image data can be conventional numeric simulation side
Method provides verifying.The present invention helps to grasp key events mechanism, reduces the uncertainty of core melt progression.
Further, the lifting that upper bell is controlled by hydraulic press is controlled the lifting of lower bell by fork truck, is conducive to control.
Further, 6 saturating windowsill sidewall of the furnace body spiral escalation arrangements, are uniformly distributed in the circumferential, are conducive to observation not
With the fusing situation of the fuel rod of angle.
Further, since reactor fuel rod will melt under 2000 DEG C or more of hot conditions, saturating window surface
It will receive biggish radiant heat transfer amount.Saturating window ara is excessive, and to will lead to its surface temperature excessively high and be damaged.On the other hand, thoroughly
Window ara is too small to will lead to observation visual angle very little, can not record the fusion process of entire fuel rod.Comprehensively consider, visualized experiment
Device uses the saturating window of circular platform type, and the diameter that the top surface opening of window is arranged is 25mm, and the diameter at bottom opening is 74mm.
The saturating window of circular platform type through the invention may be implemented fuel rod and melt the dynamically recording migrated.
Further, quartz glass size is smaller to reduce radiant heat transfer amount, reduces the surface temperature of quartz glass, institute
With the diameter of quartz glass is 40mm in the present invention.The saturating window of circular platform type is offered on furnace body to increase observation visual angle.High-temperature fusion
High-speed camera instrument outside furnace can record fuel rod fusing process when reality through the saturating window of circular platform type of furnace wall.
Guarantee that furnace body temperature outside is maintained within security restriction by high temperature smelting furnace cooling water recirculation system, it is external
High-speed camera instrument can work normally, and this method being capable of core melt progression under the conditions of real simulation reactor disaster.This
Experimental temperature in invention is up to 2000 DEG C or more, and the experimental data that the present invention obtains can be provided for conventional numeric analogy method and be tested
Card, reduces the uncertainty of existing Analysis Codes of Severe Accident.Since the experimental data obtained in open source literature is unable to satisfy me
State carries out core material melts and melting using experimental method of the invention to reactor disaster program autonomy-oriented demand
Material migration characteristic research, the development for the Nuclear Energy Science and Engineering profession in China, to reactor disaster process and machine
Reason research, specific extremely important meaning.
Detailed description of the invention
Fig. 1 is high temperature smelting furnace experimental provision three-dimensional schematic diagram.
Fig. 2 is the saturating window schematic diagram of circular platform type.
Fig. 3 is the structural schematic diagram that nuclear reactor fuel rod of the invention melts visual experimental apparatus.
In figure, 1 is control cabinet, and 2 be lobe pump, and 3 be slide valve pump, and 4 be ladder, and 5 be support frame, and 6 be high temperature smelting furnace, 7
It is hydraulic press for fork truck, 8,9 be quartz glass, and 10 be rectangular seal, and 11 be screw, and 12 be O-ring seal, and 13 be vacuum
Pipe, 14 be vacuum valve, and 15 be vacuum gauge, and 16 be upper bell, and 17 be lower bell, and 18 be sidewall of the furnace body, and 19 be saturating window, and 20 be tungsten
Rhenium thermocouple, 21 be copper electrode, and 22 be rhenium molybdenum electrode, and 23 be crucible, and 24 be W-Re heating rod, and 25 be fuel rod, and 26 be water supply
Pump, 27 be elevator pump, and 28 be cooling tower, and 29 be water-level gauge, and 30 be water tank, and 31 be water segregator, and 32 be water collector, and 33 be water source,
34 be water compensating valve.
Specific embodiment
Below by attached drawing, the present invention will be described in detail.
Referring to figure 1, figure 2 and figure 3, visualized experiment method of the invention mainly passes through the saturating window of six trapezoidal water coolings and high temperature
Melting furnace cooling water recirculation system is realized.Experimental method of the invention can visually disclose core material melts and fusant
Transient performance characteristic is migrated, verifying can be provided for conventional numeric analogy method by obtaining visual image data.The present invention facilitates
Key events mechanism is grasped, the uncertainty of core melt progression is reduced.
Nuclear reactor fuel rod fusing visual experimental apparatus of the invention is as shown in Figure 1.Nuclear reactor fuel rod fusing
Visual experimental apparatus includes the high-temperature fusion 6 with several saturating windows, is vertically arranged with testpieces in high temperature smelting furnace 6, is tried
The top and bottom for testing part are respectively arranged with rhenium molybdenum electrode 22, and rhenium molybdenum electrode 22 is for clamp assay part and conductive, rhenium molybdenum electrode
22 are connected with the copper electrode 21 for passing through high-temperature fusion furnace sidewall, and testpieces includes centrally disposed W-Re heating rod 24, W-Re
The outside of heating rod 24 is provided with fuel rod 25, and fuel rod 25 wraps up W-Re heating rod 24, i.e., W-Re heating rod 24 is located at combustion
The center of charge bar 25, fuel rod outer surface are zirconium -4 alloy.Bell 16 is provided at the top of high temperature smelting furnace, bottom is provided with
Lower bell 17, upper bell 16 are connected with hydraulic press 8, and lower bell 17 is connected with fork truck 7, and upper bell 16 is controlled by hydraulic press 8 and gone up and down,
Lower bell 17 is controlled by fork truck 7 and is gone up and down.
Crucible 23 is provided with below fuel rod 25, crucible 23 is arranged on lower bell 17.Exist across high-temperature fusion furnace sidewall
Different height is provided with 6 Wolfram rhenium heat electric couples 20, for measuring the temperature of fuel rod 25.
The saturating windowsill sidewall of the furnace body spiral escalation of 6 saturating windows 21,6 is offered on the sidewall of the furnace body 18 of high temperature smelting furnace 6
Arrangement, is uniformly distributed in the circumferential, and two neighboring window is 0.16m in the distance of vertical direction.Since reactor fuel rod will
It is melted under 2000 DEG C or more of hot conditions, therefore window surface will receive biggish radiant heat transfer amount thoroughly.Saturating window ara is excessive
It is excessively high and be damaged to will lead to its surface temperature.On the other hand, saturating window ara is too small will lead to observation visual angle very little, Wu Faji
Record the fusion process of entire fuel rod.Comprehensively consider, visual experimental apparatus uses the saturating window of circular platform type, and the top surface of window is arranged
The diameter of opening is 25mm, and the diameter at bottom opening is 74mm.
The saturating window of circular platform type is as shown in Figure 2.Saturating window inlet, which is arranged on 6 side wall of high temperature smelting furnace, opens up round-meshed circle
Shape cover board is uniformly distributed circumferentially 6 screws 11 in circular cover, and circular cover and high-temperature fusion furnace sidewall are passed through screw
It is connected.Columned quartz glass 9, and circular cover and quartz are provided between 6 side wall of circular cover and high temperature smelting furnace
It is provided with O-ring seal 12 between glass 9, rectangular seal 10 is provided on the side wall of quartz glass 9, while guaranteeing device
Airtightness.The diameter of quartz glass is 40mm, and size is smaller to reduce the surface temperature of quartz glass to reduce radiant heat transfer amount,
Furnace body in quartz glass offers the saturating window of circular platform type to increase observation visual angle.High-speed camera instrument outside high temperature smelting furnace penetrates furnace
The saturating window of the circular platform type of wall can record fuel rod fusing process when reality.Since furnace is outside with the presence of high-speed camera instrument, it is therefore desirable to right
Entire experimental provision is cooled down.
The cooling water recirculation system of high temperature smelting furnace 6 is as shown in Figure 3.Cooling water recirculation system includes water tank 30, upper bell
It is provided with pipeline on 16, pipeline is provided on high-temperature fusion sidewall of the furnace body, pipeline is provided on lower bell 17, is set on copper electrode 21
It is equipped with pipeline；Water tank 30 is connected with 28 entrance of water pump, and the outlet of water pump 28 is connected with No. five water segregators 31, and No. five water segregators 31 go out
Mouth respectively with the entrance on upper bell, the entrance on high-temperature fusion sidewall of the furnace body, the entrance on lower bell 17,
Entrance and 2 entrance of lobe pump on copper electrode 21 are connected, pipe outlet, high-temperature fusion sidewall of the furnace body on upper bell 16
On pipe outlet, the pipe outlet on lower bell 17, the pipe outlet on copper electrode 21 and lobe pump 2 export with catchment
32 entrance of device is connected, and the outlet of water collector 32 is connected with water tank 30.
It is provided with water-level gauge 29 in water tank 30, cooling tower 28 is provided with above water tank 30, is provided with elevator pump in water tank 30
27, the outlet of elevator pump 27 is connected with cooling tower 28；Recirculated cooling water in water tank 30 drives five road Fen Shui of Song Zhi by feed pump 26
In device 31, upper bell 16, sidewall of the furnace body, lobe pump 2, copper electrode 21 and lower bell 17 are flowed to respectively.Cooling water is cooling corresponding real
It is converged in water collector 32 after testing equipment, final reflow tank 30.When experiment, cooling water recirculation system will export in real time into and out of
It is right will all to start water compensating valve 34 if import and export water temperature is lower than limit value more than the water level of limit value or water tank for the mild cistern water level of saliva
30 make-up water source 33 of water tank, is provided with water compensating valve 34 between water source 33 and water tank 30.On the other hand, the water in water tank 30 is by being promoted
Pump 27 is promoted to the cooling tower 28 of eminence, and cooling water is flow back into water tank 30 after air is cooling.Cooling water recirculation system is protected
Demonstrate,prove the safety of experimental facilities of the fuel rod under 2000 DEG C or more of hot conditions.The saturating window of circular platform type through the invention can be real
Existing fuel rod melts the dynamically recording migrated, and the experimental data that the present invention obtains can provide verifying for conventional numeric analogy method,
Reduce the uncertainty of existing Analysis Codes of Severe Accident.
2 side of lobe pump is connected with control cabinet 1, and 2 other side of lobe pump is connected with slide valve pump 3, the warp of lobe pump 2 and vacuum tube
13 are connected with high-temperature fusion furnace interior, and vacuum valve 14 and vacuum gauge 15 are provided on vacuum tube 13.
High-temperature fusion furnace exterior is provided with support frame 5, and 5 side of support frame is provided with ladder 4.
When experiment, start the feed pump 26 and elevator pump 27 of cooling water recirculation system, feed pump 26 is located at outside water tank 30
Bing Yu No. five water segregator 31 is connected, and corresponding experiment will be flowed to respectively after cooling water Song Zhi No. five water segregator 31 in water tank 30 and is set
It is standby, it is converged in five road water collectors 33 after the cooling corresponding experimental facilities of cooling water, five road water collectors 33 are connected with water tank 30, cooling
The final reflow tank 30 of water.Elevator pump 27 is located at 30 bottom of water tank, and the water in water tank 30 is promoted to the cooling tower 28 of eminence, cold
But water is flow back into water tank 30 after air is cooling.Subsequent start-up slide valve pump 3 and lobe pump 2, slide valve pump 3 and lobe pump 2 are logical
It crosses vacuum pipe 15 to be connected with high-temperature fusion furnace chamber, to high-temperature fusion stove evacuation, when vacuum degree reaches in high temperature smelting furnace
Argon system starts therewith after setting value.The argon gas of constant flow rate from furnace bottom be passed through in high temperature smelting furnace up to furnace pressure reaches
To 1.2MPa.Subsequent alternating current by water cooling copper electrode 21 and rhenium molybdenum electrode 34, flow into W-Re heating rod 24 to fuel rod 25 into
Row electric heating.High-speed camera instrument is through the saturating window captured in real-time furnace internal combustion charge bar fusing in furnace wall and migrating tendency process and saves, tungsten
Rhenium thermocouple 20 measures the temperature of fuel rod outer surface zirconium -4 alloy and preservation.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (5)
1. a kind of nuclear reactor fuel rod melts visual experimental apparatus, which is characterized in that the height including having several saturating windows
Warm melting furnace is vertically arranged with testpieces in high temperature smelting furnace, and the top and bottom of testpieces are respectively arranged with rhenium molybdenum electrode
(22), testpieces, rhenium molybdenum electrode (22) are connected with the copper electrode (21) for passing through high-temperature fusion furnace sidewall, are tried by rhenium molybdenum electrode (22)
Testing part includes fuel rod (25), is provided with W-Re heating rod (24) in fuel rod (25), is provided with and is used on the outside of high temperature smelting furnace
Cooling cooling water recirculation system is carried out to high temperature smelting furnace；
It is provided at the top of high temperature smelting furnace bell (16), bottom is provided with lower bell (17), upper bell (16) and hydraulic press
(8) it is connected, lower bell (17) is connected with fork truck (7), and upper bell (16) is controlled by hydraulic press (8) and gone up and down, and lower bell (17) is by pitching
Vehicle (7) control lifting；
Saturating window is in circular platform type, and the diameter of the top surface opening of saturating window is 25mm, and the diameter at bottom opening is 74mm；
6 saturating windows (19), 6 saturating windowsill sidewall of the furnace body spiral escalation rows are offered on the sidewall of the furnace body (18) of high temperature smelting furnace
Cloth is uniformly distributed in the circumferential；
Three layers of thermal insulation layer are provided between sidewall of the furnace body (18) and fuel rod (25)；
Across high-temperature fusion furnace sidewall, different height is provided with 6 Wolfram rhenium heat electric couples (20)；
Be provided with circular cover in high-temperature fusion furnace sidewall at saturating window, in circular cover and high-temperature fusion furnace sidewall between be arranged
Have quartz glass (9), offers circular hole in circular cover；The diameter of quartz glass is 40mm；
Cooling water recirculation system includes water tank (30), is provided with pipeline on upper bell (16), is arranged on high-temperature fusion sidewall of the furnace body
There is pipeline, pipeline is provided on lower bell (17), copper electrode is provided with pipeline on (21)；Water tank (30) outlet enters with water pump (26)
Mouth is connected, and water pump (26) outlet is connected with No. five water segregators (31), and the outlet of No. five water segregators (31) is respectively and on upper bell
Entrance, the entrance on high-temperature fusion sidewall of the furnace body, the entrance on lower bell (17), the pipe on copper electrode (21)
Road entrance and lobe pump (2) entrance are connected, and the pipe outlet on upper bell (16), the pipeline on high-temperature fusion sidewall of the furnace body go out
Mouth, the pipe outlet on lower bell (17), the pipe outlet on copper electrode (21) and lobe pump (2) outlet are and water collector
(32) entrance is connected, and water collector (32) outlet is connected with water tank (30) entrance；Water-level gauge (29), water tank are provided in water tank (30)
(30) top is provided with cooling tower (28), is provided with elevator pump (27) in water tank (30), elevator pump (27) outlet and cooling tower
(28) it is connected.
2. a kind of nuclear reactor fuel rod according to claim 1 melts visual experimental apparatus, which is characterized in that fuel
It is provided with crucible (23) below stick (25), crucible (23) is arranged on lower bell (17).
3. a kind of nuclear reactor fuel rod according to claim 1 melts visual experimental apparatus, which is characterized in that adjacent
Two saturating windows are 0.16m in the distance of vertical direction.
4. a kind of nuclear reactor fuel rod according to claim 1 melts visual experimental apparatus, which is characterized in that round
Cover board is fixed by screws on the side wall of high temperature smelting furnace, quartz glass be it is cylindric, circular cover and quartz glass (9) it
Between be provided with O-ring seal (12), rectangular seal (10) are provided on the side wall of quartz glass (9).
5. a kind of experimental method based on nuclear reactor fuel rod described in claim 1 fusing visual experimental apparatus, special
Sign is, opens feed pump (26) and elevator pump (27), and feed pump (26) is located at water tank (30) external Bing Yu No. five water segregator
(31) it is connected, corresponding experimental facilities will be flowed to respectively after cooling water Song Zhi No. five water segregator (31) in water tank (30), it is cooling
It is converged in water collector (32) after the cooling corresponding experimental facilities of water, water collector (32) is connected with water tank (30), and cooling water finally flows
Recovery tank (30)；Elevator pump is located at water tank bottom, and the water in water tank is promoted to the cooling tower of eminence, and cooling water is cold by air
But it flows back into afterwards in water tank (30)；Then to being vacuumized in high temperature smelting furnace, when vacuum degree reaches setting value in high temperature smelting furnace
After be passed through argon gas, argon gas from furnace bottom be passed through in high temperature smelting furnace up to high-temperature fusion furnace pressure reaches 1.2 MPa, alternating current
By water cooling copper electrode (12) and rhenium molybdenum electrode (22), flows into W-Re heating rod (24) and fuel rod (25) is electrically heated；It is high
Fast video camera is through the saturating window captured in real-time furnace internal combustion charge bar fusing in furnace wall and migrating tendency process and saves, 6 Wolfram rhenium heat electric couples
(20) temperature and the preservation of fuel rod outer surface zirconium -4 alloy are measured.
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| CN201810338609.8A CN108447573B (en) | 2018-04-16 | 2018-04-16 | A kind of nuclear reactor fuel rod fusing visual experimental apparatus and method |
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| CN201810338609.8A CN108447573B (en) | 2018-04-16 | 2018-04-16 | A kind of nuclear reactor fuel rod fusing visual experimental apparatus and method |
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