CN109524137A - A kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system and method - Google Patents
A kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system and method Download PDFInfo
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- CN109524137A CN109524137A CN201811512781.7A CN201811512781A CN109524137A CN 109524137 A CN109524137 A CN 109524137A CN 201811512781 A CN201811512781 A CN 201811512781A CN 109524137 A CN109524137 A CN 109524137A
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- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system and method, the system includes the major loop being made of water tank, test section, feed pump and associated conduit valve, the cooling circuit being made of cooling tower, auxiliary pump, heat exchanger and associated conduit valve, the fused salt circuit being made of molten salt furnace, vacuum pump and associated conduit valve, the thermally conductive oil return line and heating module, collecting measurement data module, image collection analysis module and control module be made of heat conduction oil tank, accumulator tank and associated conduit valve；The present invention also provides the test methods of the system；The present invention is tested by carrying out nuclear reactor heat transfer free convection of double layer configuration molten bath (upper metallization layer+lower part oxidation fusion pond) under major accident, the heat-transfer character of oxidation fusion pond heat-transfer character up and down and metal layer to side wall is obtained, the application to engineering practice that can withhold technology (IVR) for reactor core fusant provide reference.
Description
Technical field
The present invention relates to the fusion pool heat transfer free convection characteristic studying technological domain under nuclear power plant's severe accident conditions, tools
Body is related to a kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system and method.
Background technique
When major accident occurs for nuclear power plant's presurized water reactor, the reactor core fusant of generation can be migrated to lower head of pressure vessel
Form fusion pool.The flowing heat transfer characteristic of fusion pool has the distribution of lower head wall heat load and external cooling capacity important
Influence, be severe accident relieving strategy IVR concern key object.Currently, having carried out both at home and abroad some about melting
The experimental study of pond heat-transfer character, the heat exchange relation obtained are unable to satisfy the actual demand under nuclear reactor engineering magnitude.
In addition, what most of research both domestic and external was carried out both for single layer molten bath configuration, it is special for the heat transfer of two layers of configuration fusion pool
Journal of Sex Research is seldom.And show fusion pool steady based on RASPLAV the and MASCA test result that actual response heap material is carried out
It will form two layers of fusion pool configuration of upper metallization layer lower part oxide layer under state.
By carrying out the double-deck Bath Heat-Transfer attribute testing under nuclear reactor engineering magnitude, oxygen under limit can be obtained
Change fusion pool heat-transfer character up and down and the lateral heat-transfer character of metal layer, while being ground for metal layer hot focus effect
Study carefully offer important evidence, this application to engineering practice for withholding technology (IVR) for reactor core fusant has great significance.
For example, document (Theerthan SA, Kolb G, Sehgal BR.Double diffusive convection
in a semicircular slice with internal heat generation in one or both layers
[J] .Experimental heat transfer, 2001,14 (4): 283-297.) disclose a kind of fusion pool heat-transfer character examination
Circuit is tested, salt water and pure water, pure water and paraffin oil is respectively adopted as test working medium simulated dual-layer molten bath structure in test.Test is ground
The influences of the factors to heat-transfer character such as two layers of molten bath compatibility, density contrast and inner heat source distribution are studied carefully.Due to the plant bulk compared with
It is small, the characterisitic parameter of fusion pool under nuclear reactor engineering magnitude can not be obtained, Er Qieshui, salt water and paraffin oil can not also reflect very
Coagulating property of the real fusant as eutectic mixture.
For another example, document (Gaus-Liu X, Mjasoedov A, Cron T, et al.Test and Simulation
Results of LIVE-L4+LIVE-L5L [M] .KIT Scientific Publishing, 2011) disclose a kind of melting
Pond heat-transfer character test loop, test use high temperature NaNO3-KNO3Alternative materials of the binary mixture as true fusant, are obtained
Obtained the associated heat transfer characteristic in oxidation fusion pond.But the test does not fit the heat transfer relation formula of metal layer, obtained Rayleigh
Number is still less than normal compared to nuclear reactor magnitude.
For another example, document (Li Ma, Jing Li, Shui Ji, Huajian Chang.Turbulent convection
experiment at high Rayleigh number to support CAP1400 IVR strategy[J].Nuclear
Engineering and Design, 2015,292:69-75) a kind of high Rayleigh number fusion pool test loop is disclosed, test is ground
Study carefully the heat-transfer character of metal layer, and verifies applicability of the associated heat transfer relational expression under high power nuclear reactor real working condition.
But the research is carried out only for upper metallization layer, there is no fusion pool heat transfer free convection relational expression, it is even more impossible to simulated dual-layers
The heat-transfer character of fusion pool.
Summary of the invention
In order to overcome the above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of nuclear reactor project amounts
The double-deck Bath Heat-Transfer characteristic test system of grade and method are changed for carrying out the double-deck molten bath free convection under nuclear reactor engineering magnitude
Thermal characteristics test.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system, including by water tank 1, the first valve
101, the first y-type filter 301, the first connecting hose 401, feed pump 2, the second connecting hose 402, the second valve 102, first flow
Count 201, test section 3, third valve 103, second flowmeter 202, the 4th valve 104, third flowmeter 203, the 5th valve
105, the major loop of heat exchanger 4, the 6th valve 106 and its pipeline composition；By water tank 1, the first valve 101, the filtering of the first Y type
The bypass circulation that device 301, the first connecting hose 401, feed pump 2, the second connecting hose 402, the 7th valve 107 and its pipeline form；
By cooling tower 5, the 8th valve 108, the second y-type filter 302, third connecting hose 403, auxiliary pump 6, the 4th connecting hose 404,
The cooling circuit that 4th flowmeter 204, the 9th valve 109, heat exchanger 4, the tenth valve 110 and its pipeline form；By molten salt furnace
7, the fused salt of the first high-temperature valve 111, test section 3, the second high-temperature valve 112, extraction valve 121, vacuum pump 8 and its pipeline composition returns
Road；It is led by what heat conduction oil tank 9, third high temperature valve 113, test section 3, the 4th high-temperature valve 114, accumulator tank 10 and associated conduit formed
Hot oil circuit；
First y-type filter 301 is arranged in 101 downstream of the first valve, for filtering the cooling water from water tank 1；It is main
Water pump 2 is located at 301 downstream of the first y-type filter, and 2 upstream and downstream pipeline of feed pump is connected separately with the first connecting hose 401 and second
Connecting hose 402 runs caused pipeline vibration for slowing down feed pump 2；Threeway is installed in second connecting hose, 402 downstream line
Two outlets of connector, threeway are separately connected major loop and bypass circulation；Bypass circulation passes through the 7th valve 107 and water tank 1
It is connected, provides flow for major loop and adjust；
The second valve 102, the first electromagnetic flowmeter 201, are sequentially installed on the major loop in 402 downstream of the second connecting hose
One temperature sensor 501 and test section 3, wherein the first electromagnetic flowmeter 201 and the first temperature sensor 501 are respectively used to measure
Major loop flow and temperature；Major loop water is divided into two branches in cooling test section 3, respectively flow through third valve 103,
Second temperature sensor 502 and the major loop first branch of the second electromagnetic flowmeter 202 and flow through the 4th valve 104, third temperature
The major loop second branch for spending sensor 503, third electromagnetic flowmeter 203, wherein the second electromagnetic flowmeter 202 and second temperature
Sensor 502 is respectively used to the flow and temperature of the measurement major loop first branch, and third electromagnetic flowmeter 203 and third temperature pass
Sensor 503 is respectively used to the flow and temperature of measurement major loop second branch；The major loop first branch and major loop second branch
Cooling water meet at 105 upstream of the 5th valve through three-way connection, after by 105 downstream of the 5th valve heat exchanger 4 and the 6th
Valve 106 comes back to water tank 1, wherein the 4th temperature sensor 504 and the 5th temperature sensor 505 are separately positioned on heat exchange
4 major loop side upstream and downstream of device, the water temperature for measuring 4 major loop side upstream and downstream of heat exchanger change, and first pressure sensor 601 is set
It sets in 106 downstream of the 6th valve, for measuring major loop pressure, collectively constitutes the major loop of pilot system above；
Recirculated water in cooling tower 5 is followed by the 8th valve 108, the second y-type filter 302, auxiliary pump the 6, the 9th
Valve 109, heat exchanger 4 and the tenth valve 110, cool down major loop water；6 upstream and downstream pipeline of auxiliary pump is connected separately with
Third connecting hose 403 and the 4th connecting hose 404 run caused pipeline vibration for slowing down auxiliary pump 6；Wherein, the 4th electricity
The setting of magnetic flowmeter 204 is in 404 downstream of the 4th connecting hose, for measuring cooling circuit flow, the 6th temperature sensor 506 and the
Seven temperature sensors 507 are separately positioned on heat exchanger 4 and cool back trackside upstream and downstream, cool back trackside for measuring heat exchanger 4
The water temperature in downstream changes, and second pressure sensor 602 is arranged in 110 downstream of the tenth valve, for measuring cooling circuit pressure, with
On collectively constitute the cooling circuit of pilot system；
Molten salt furnace 7 is connected by the first high-temperature valve 111 and the second high-temperature valve 112 with test section 3 respectively, realizes test working medium
Injection and recycling；Vacuum pump 8 is connected by extraction valve 121 with molten salt furnace 7, provides drive to test injection and the recycling of working medium
It is dynamic, the fused salt circuit of pilot system is collectively constituted above；
High temperature heat conductive oil in heat conduction oil tank 9 enters test section 3, test knot through third high temperature valve 113 by gravity
Shu Houcong test section 3 enters accumulator tank 10 through the 4th high-temperature valve 114, collectively constitutes the thermally conductive oil return line of pilot system above；
Pilot system further includes heating module 11, collecting measurement data module 12, image collection analysis module 13 and control
Molding block 14.
The test section 3 includes semicircle slice pressure vessel 3001, cover board 3002, electrical heating elements 3003 and thermometric group
Part 3004；Semicircle slice pressure vessel 3001 is by front side wall surface 1001, rear side wall surface 1002 and connection front side wall surface 1001
It is formed with the circular arc wall surface 1003 of rear side wall surface 1002；Rectangle quartz glass window is provided with right above front side wall surface 1001
3005, situation and hard shell congealing property are stired and make muddy for observing and shooting the convection current tested at double-deck molten bath interface in the process；Circle
1003 outside weldings of arc wall surface have cooling duct 1004, and 1004 bottom of cooling duct is water inlet, and top is water outlet, after water flowing
The heat that the double-deck molten bath generates in test section 3 can be taken away；It is placed with cover board 3002 above semicircle slice pressure vessel 3001,
3002 left and right ends of cover board offer cooling water inlet and outlet respectively, can be the double-deck molten bath of formation in test section 3 after water flowing
Nearly quasi-isothermal boundary condition is provided；Multilayer electrical heating elements 3003 are inserted into the horizontal direction in the lower area of test section 3, are used
Decay heat in simulation oxidation fusion pond；The temperature measurement component 3004 being set in test section 3 is each for precise measurement bilayer molten bath
The Temperature Distribution in region；Third pressure sensor 603 is inserted into test section 3, for the pressure change in monitoring test section 3.
The molten salt furnace 7 can provide high-temperature molten salt for test section 3, for the lower part oxidation fusion in simulated dual-layer molten bath
Pond；Molten salt furnace 7 is connected by the first high-temperature valve 111 and its corresponding pipeline with test section 3, collectively constitutes fused salt injection pipe above
Section provides channel for fused salt injection；7 upstream arrangement of molten salt furnace has extraction valve 121 and vacuum pump 8, and 7 downstream of molten salt furnace passes through second
High-temperature valve 112 and its corresponding pipeline are connected with test section 3, collectively constitute fused salt recycling pipeline section above, provide for fused salt recycling logical
Road；The 8th thermometer 508 and the 4th pressure gauge 604 wherein installed on molten salt furnace 7 are respectively used to the temperature in monitoring molten salt furnace 7
And pressure change.
The heat conduction oil tank 9 can provide high temperature heat conductive oil for test section 3, for the upper metal in simulated dual-layer molten bath
Layer；3 upstream of test section is connected by third high temperature valve 113 and its pipeline with heat conduction oil tank 9, collectively constitutes conduction oil injection above
Pipeline section provides channel for conduction oil injection；3 downstream of test section is connected by the 4th high-temperature valve 114 and its pipeline with accumulator tank 10,
Conduction oil recycling pipeline section is collectively constituted above, provides channel for conduction oil recycling；The 9th temperature wherein installed in heat conduction oil tank 9
Table 509 and the 5th pressure gauge 605 are respectively used to the temperature and pressure variation in monitoring heat conduction oil tank 9.
The heating module 11 of the pilot system includes that electric heating wire, pressure regulator and related controller switching equipment, electric heating wire are
Fused salt circuit and conduction oil return provide preheating and heat preservation, and heating power is controlled by pressure regulator；The DATA REASONING is adopted
Collection module 12 is mainly used for acquisition characterisitic parameter relevant to record and test；The image collection analysis module 13 is mainly used for
Heat convection and hard shell congealing property at 3 double-deck molten bath interface of shooting and record test section；Control module 14 can be realized pair
The remote control of remaining each module and relevant device.
Before on-test, the nitrate mixture of default molar ratio is filled for the pilot system corresponding test method
Enter and heats fusing in molten salt furnace 7；Feed pump 2, cooling tower 5, auxiliary pump 6, heating module are successively opened by control module 14
11, collecting measurement data module 12, image collection analysis module 13；
When fused salt circuit and conduction oil return are heated to 300 DEG C by heating module 11, the first high-temperature valve is opened
111, using gravity by the nitrate injection testing section 3 of high-temperature molten-state, stop injection after molten metal pool level reaches 1800mm,
Close the first high-temperature valve 111；It opens third high temperature valve 113 and works as molten bath using gravity by high temperature heat conductive oil injection testing section 3
Liquid level stops injection after being 2000mm, closes third high temperature valve 113；At this moment since above two material density is different and cannot mix
Molten, high temperature heat conductive oil will float on the top of molten state nitrate, and double-deck molten bath structure is formed in test section 3；Test working medium note
After entering, heating module 11 is closed；
When test, 3003 heat run section of multilayer electrical heating elements, 3 lower part fused salt regional simulation oxidation fusion pond is opened, no
3 top conduction oil regional simulation metal layer of heat run section；When temperature measurement component 3004 measure the double-deck bath temperature no longer occur it is bright
Aobvious variation, i.e., available collecting measurement data module 12 are acquired record to the heat transfer characteristic parameter of pilot system；It was testing
Cheng Zhong should use image collection analysis module 13 to be directed at quartz glass window 3005 and shoot heat convection at the double-deck molten bath interface
And hard shell condenses situation；
After data acquire, heating module 11 is opened by fused salt circuit and conduction oil return and is heated to 300 DEG C；It beats
The 4th high-temperature valve 114 is opened, the conduction oil of 3 top of test section simulation metal layer is drained in accumulator tank 10, the 4th high temperature is closed
Valve 114；Extraction valve 121 is opened, molten salt furnace 7 is evacuated using vacuum pump 8；Extraction valve 121 is closed, the second high-temperature valve 112 is opened,
The fused salt that oxidation fusion pond is simulated in 3 lower part of test section is sucked in molten salt furnace 7 again under the action of negative pressure, closes the second high-temperature valve
112；
After the test, feed pump 2, cooling tower 5, auxiliary pump 6, heating module 11, number are closed by control module 14
According to measurement acquisition module 12 and image collection analysis module 13.
Compared to the prior art compared with the present invention has following advantage:
1, pilot system of the present invention is lower head of pressure vessel when major accident occurring for nuclear power plant's reactor
The double-deck molten bath structure design of interior formation, it is tested different from the separation effect carried out in other patents or document, this test energy
Enough complex heat transfer characteristics for studying metal layer and oxidation fusion pond simultaneously, finally obtain under different operating conditions oxidation fusion pond upwards with
Heat-transfer character of the downward and metal layer to side wall surface；
2, test section is prototype size lower head of pressure vessel piece cutting structure, semicircular examination in pilot system of the invention
It tests section design and eliminates vertical walls effect present in 1/4 circular working section, while the test section size of diameter 4m is sufficiently examined
The actual demand of nuclear reactor engineering magnitude is considered, significant figure can be provided for the double-deck Bath Heat-Transfer characteristic under full-scale condition
According to；
3, oxidation fusion pond in lower part is simulated using high-temperature molten-state nitrate in test method of the invention, is led using high temperature
Hot oil simulates upper metallization layer, and physical parameter and the actual response heap bath properties parameter for melting substance simulant are similar.In addition, examination
Test the molten state nitrate in pars infrasegmentalis region by high temperature heat conductive oil it is cooling after can be solidified at the double-deck interface, this and real conditions
Crust characteristic at the interface of lower bilayer molten bath is closely similar.Therefore, this test result can withhold technology for reactor core fusant
(IVR) application to engineering practice provides reference.
Detailed description of the invention
Fig. 1 is the schematic diagram of pilot system of the present invention.
Fig. 2 is the function structure chart of pilot system of the present invention.
Fig. 3 is the test section schematic diagram of pilot system of the present invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description:
As shown in Figure 1, the present invention relates to a kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test systems, including
The first connecting hose 401 and the first y-type filter 301 in 2 upstream line of feed pump 2 and feed pump on major loop, the first Y type
The first valve 101 and its upstream storage tank 1 in 301 upstream line of filter；It is soft that second is connected in 2 downstream line of feed pump
Connector 402 is slowed down feed pump 2 by the cooperation of the first connecting hose 401 and the second connecting hose 402 and exports pipeline caused by fluid
Vibration；Three-way connection is installed, two outlets of threeway are separately connected major loop and bypass in 402 downstream line of the second connecting hose
Circuit；Wherein bypass circulation is connected by the 7th valve 107 with water tank 1, is provided flow for major loop and is adjusted；Second connecting hose
The second valve 102 and the first electromagnetic flowmeter 201 are sequentially installed on the major loop in 402 downstreams, under the first electromagnetic flowmeter 201
The first temperature sensor 501 and test section 3 of trip, wherein the first electromagnetic flowmeter 201 and the first temperature sensor 501 are used respectively
In measurement major loop flow and temperature；Major loop is divided into two branches in cooling test section 3, is to flow through third valve respectively
103, second temperature sensor 502, the major loop first branch of the second electromagnetic flowmeter 202 and the 4th valve 104, third are flowed through
The major loop second branch of temperature sensor 503, third electromagnetic flowmeter 203, wherein the second electromagnetic flowmeter 202 and the second temperature
Degree sensor 502 is located at the flow and temperature for being respectively used to the measurement major loop first branch, third electromagnetic flowmeter 203 and third
Temperature sensor 503 is respectively used to the flow and temperature of measurement major loop second branch；The major loop first branch and major loop
The cooling water of two branches meets at 105 upstream of the 5th valve through three-way connection, after by changing on 105 downstream pipe of the 5th valve
Hot device 4,4 downstream of heat exchanger the 6th valve 106 come back to water tank 1；Wherein the 4th temperature sensor 504 and the 5th temperature
Sensor 505 is separately positioned on 4 major loop side upstream and downstream of heat exchanger, for measuring the water temperature of 4 major loop side upstream and downstream of heat exchanger
Variation, first pressure sensor 601 are arranged in 106 downstream of the 6th valve, for measuring major loop pressure, collectively constitute examination above
The major loop of check system.
As shown in Figure 1, cooling circuit includes the third connecting hose 403 and of 6 upstream line of auxiliary pump 6 and auxiliary pump
Two y-type filters 302, the 8th valve 108 and its upstream cooling tower (5) of 302 upstream of the second y-type filter；Under auxiliary pump 6
It is connected with the 4th connecting hose 404 on play pipe road, slows down auxiliary by the cooperation of third connecting hose 403 and the 4th connecting hose 404
Water pump 6 exports pipeline vibration caused by fluid；4th connecting hose, 404 arranged downstream has the 4th electromagnetic flowmeter 204, heat exchanger 4
And the 9th valve 109 and the tenth valve 110 in downstream disposed thereon；Wherein, the 4th electromagnetic flowmeter 204 is cooled back for measuring
Road flow, the 6th temperature sensor 506 and the 7th temperature sensor 507 are separately positioned on heat exchanger 4 and cool back trackside upstream and downstream,
The water temperature variation of trackside upstream and downstream is cooled back for measuring heat exchanger 4, second pressure sensor 602 is for measuring cooling circuit pressure
Power collectively constitutes the cooling circuit of pilot system above；Molten salt furnace 7 passes through the first high-temperature valve 111 and the second high-temperature valve 112 respectively
It is connected with test section 3, realizes the injection and recycling of test working medium；Vacuum pump 8 is connected by extraction valve 121 with molten salt furnace 7, for examination
The injection and recycling for testing working medium provide driving, collectively constitute the fused salt circuit of pilot system above；High temperature in heat conduction oil tank 9 is led
Hot oil enters test section 3 through third high temperature valve 113 by gravity, after the test from test section 3 through the 4th high-temperature valve 114
Into accumulator tank 10, the thermally conductive oil return line of pilot system is collectively constituted above.
As shown in Fig. 2, heating module 11 includes electric heating wire, pressure regulator and related controller switching equipment, wherein electric heating wire is
Fused salt circuit and conduction oil return provide preheating and heat preservation, and heating power is controlled by pressure regulator.Collecting measurement data mould
Block 12 includes flowmeter, temperature sensor and pressure sensor, and surveyed parameter passes through data collection system and passes to computer.
Image collection analysis module 13 includes high-speed camera instrument, light source and associated picture processing software, is mainly used for shooting and record
Heat convection and hard shell congealing property at the double-deck molten bath interface of test section 3.Control module 14 can be realized to remaining each module
And the remote control of relevant device.
As shown in figure 3, test section 3 includes semicircle slice pressure vessel 3001, cover board 3002,3003 and of electrical heating elements
Temperature measurement component 3004；Semicircle slice pressure vessel 3001 is by front side wall surface 1001, rear side wall surface 1002 and connection front side wall
The circular arc wall surface 1003 of face 1001 and rear side wall surface 1002 composition；Rectangle quartz glass view is provided with right above front side wall surface 1001
Window 3005 stirs and make muddy situation and hard shell congealing property for observing and shooting the convection current tested at double-deck molten bath interface in the process；
1003 outside weldings of circular arc wall surface have cooling duct 1004, and 1004 bottom of cooling duct is water inlet, and top is water outlet, water flowing
The heat that the double-deck molten bath generates in test section 3 can be taken away afterwards；Cover board is placed with above semicircle slice pressure vessel 3001
3002,3002 left and right ends of cover board offer cooling water inlet and outlet respectively, can be the bilayer of formation in test section 3 after water flowing
Molten bath provides nearly quasi-isothermal boundary condition；Multilayer electrical heating elements 3003 are inserted into the lower area of test section 3 in the horizontal direction
It is interior, for simulating the decay heat in oxidation fusion pond；The temperature measurement component 3004 being set in test section 3 is molten for precise measurement bilayer
The Temperature Distribution in each region in pond.
As shown in Figure 1, the present invention provides a kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test method, tool
Body test operation process is as follows: before on-test, the nitrate mixture of default molar ratio being fitted into heat in molten salt furnace 7 and is melted
Change；Feed pump 2, cooling tower 5, auxiliary pump 6, heating module 11, collecting measurement data mould are successively opened by control module 14
Block 12, image collection analysis module 13；When fused salt circuit and conduction oil return are heated to 300 DEG C by heating module 11,
The first high-temperature valve 111 is opened, using gravity by the nitrate injection testing section 3 of high-temperature molten-state, when molten metal pool level reaches
Stop injection after 1800mm, closes the first high-temperature valve 111；Third high temperature valve 113 is opened, is injected high temperature heat conductive oil using gravity
In test section 3, stops injection after molten metal pool level is 2000mm, close third high temperature valve 113；At this moment due to above two substance
Density is different and cannot be miscible, and high temperature heat conductive oil will float on the top of molten state nitrate, and the double-deck molten bath is formed in test section 3
Structure；After testing working medium injection, heating module 11 is closed；When test, 3003 heat run of multilayer electrical heating elements is opened
3 lower part fused salt regional simulation oxidation fusion ponds of section, not 3 top conduction oil regional simulation metal layer of heat run section；When thermometric group
Part 3004 measures the double-deck bath temperature and significant change no longer occurs, i.e., available collecting measurement data module 12 changes pilot system
Thermal characteristic parameter is acquired record；During the test, image collection analysis module 13 should be used to be directed at quartz glass window
3005, which shoot heat convection and hard shell at the interface of the double-deck molten bath, condenses situation；After data acquire, heating module 11 is opened
Fused salt circuit and conduction oil return are heated to 300 DEG C；The 4th high-temperature valve 114 is opened, metal is simulated on 3 top of test section
The conduction oil of layer is drained in accumulator tank 10, closes the 4th high-temperature valve 114；Extraction valve 121 is opened, using vacuum pump 8 to fused salt
Furnace 7 is evacuated；Extraction valve 121 is closed, the second high-temperature valve 112 is opened, the fused salt in oxidation fusion pond is simulated in negative pressure in 3 lower part of test section
It is sucked in molten salt furnace 7 again under effect, closes the second high-temperature valve 112；After the test, main water is closed by control module 14
Pump 2, cooling tower 5, auxiliary pump 6, heating module 11, collecting measurement data module 12 and image collection analysis module 13.
Claims (6)
1. a kind of nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system, it is characterised in that: including by water tank
(1), the first valve (101), the first y-type filter (301), the first connecting hose (401), feed pump (2), the second connecting hose
(402), the second valve (102), first flowmeter (201), test section (3), third valve (103), second flowmeter (202),
4th valve (104), third flowmeter (203), the 5th valve (105), heat exchanger (4), the 6th valve (106) and its pipeline group
At major loop；By water tank (1), the first valve (101), the first y-type filter (301), the first connecting hose (401), main water
Pump the bypass circulation of (2), the second connecting hose (402), the 7th valve (107) and its pipeline composition；By cooling tower (5), the 8th valve
Door (108), the second y-type filter (302), third connecting hose (403), auxiliary pump (6), the 4th connecting hose (404), the 4th stream
The cooling circuit that meter (204), the 9th valve (109), heat exchanger (4), the tenth valve (110) and its pipeline form；By fused salt
Furnace (7), the first high-temperature valve (111), test section (3), the second high-temperature valve (112), extraction valve (121), vacuum pump (8) and its pipeline
The fused salt circuit of composition；By heat conduction oil tank (9), third high temperature valve (113), test section (3), the 4th high-temperature valve (114), accumulator tank
(10) and associated conduit composition thermally conductive oil return line；
First y-type filter (301) setting is in the first valve (101) downstream, for filtering the cooling water from water tank (1)；
Feed pump (2) is located at the first y-type filter (301) downstream, and feed pump (2) upstream and downstream pipeline is connected separately with the first connecting hose
(401) and the second connecting hose (402), for slowing down pipeline vibration caused by feed pump (2) are run；Under second connecting hose (402)
Three-way connection is installed, two outlets of threeway are separately connected major loop and bypass circulation on play pipe road；Bypass circulation passes through the
Seven valves (107) are connected with water tank (1), provide flow for major loop and adjust；
Be sequentially installed on the major loop in the second connecting hose (402) downstream the second valve (102), the first electromagnetic flowmeter (201),
First temperature sensor (501) and test section (3), wherein the first electromagnetic flowmeter (201) and the first temperature sensor (501) point
Major loop flow and temperature Yong Yu not measured；Major loop water is divided into two branches at cooling test section (3), respectively flows through
It the major loop first branch of third valve (103), second temperature sensor (502) and the second electromagnetic flowmeter (202) and flows through
The major loop second branch of 4th valve (104), third temperature sensor (503) and third electromagnetic flowmeter (203), wherein the
Two electromagnetic flowmeters (202) and second temperature sensor (502) are respectively used to the flow and temperature of the measurement major loop first branch,
Third electromagnetic flowmeter (203) and third temperature sensor (503) are respectively used to the flow and temperature of measurement major loop second branch
Degree；The cooling water of the major loop first branch and major loop second branch meets at the 5th valve (105) upstream through three-way connection, after
Water tank (1) is come back to by the heat exchanger (4) and the 6th valve (106) in the 5th valve (105) downstream, wherein the 4th temperature
Sensor (504) and the 5th temperature sensor (505) are separately positioned on heat exchanger (4) major loop side upstream and downstream, change for measuring
The water temperature of hot device (4) major loop side upstream and downstream changes, and first pressure sensor (601) setting is used in the 6th valve (106) downstream
In measurement major loop pressure, the major loop of pilot system is collectively constituted above；
Recirculated water in cooling tower (5) followed by the 8th valve (108), the second y-type filter (302), auxiliary pump (6),
9th valve (109), heat exchanger (4) and the tenth valve (110), cool down major loop water；Auxiliary pump (6) play pipe up and down
Road is connected separately with third connecting hose (403) and the 4th connecting hose (404), for slowing down pipe caused by auxiliary pump (6) operation
Road vibration；Wherein, the 4th electromagnetic flowmeter (204) is arranged in the 4th connecting hose (404) downstream, for measuring cooling circuit stream
Amount, the 6th temperature sensor (506) and the 7th temperature sensor (507) are separately positioned on heat exchanger (4) and cool back trackside or more
Trip, the water temperature variation of trackside upstream and downstream is cooled back for measuring heat exchanger (4), and second pressure sensor (602) is arranged the tenth
Valve (110) downstream collectively constitutes the cooling circuit of pilot system for measuring cooling circuit pressure above；
Molten salt furnace (7) is connected by the first high-temperature valve (111) and the second high-temperature valve (112) with test section (3) respectively, realizes test
The injection and recycling of working medium；Vacuum pump (8) is connected by extraction valve (121) with molten salt furnace (7), to test the injection of working medium and returning
It receives and driving is provided, collectively constitute the fused salt circuit of pilot system above；
High temperature heat conductive oil in heat conduction oil tank (9) enters test section (3) through third high temperature valve (113) by gravity, test
After from test section (3) through the 4th high-temperature valve (114) enter accumulator tank (10), collectively constitute the conduction oil of pilot system above
Circuit；
Pilot system further include heating module (11), collecting measurement data module (12), image collection analysis module (13) and
Control module (14).
2. nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system according to claim 1, it is characterised in that:
The test section (3) includes semicircle slice pressure vessel (3001), cover board (3002), electrical heating elements (3003) and thermometric group
Part (3004)；Semicircle slice pressure vessel (3001) is by front side wall surface (1001), rear side wall surface (1002) and connection front side
The circular arc wall surface (1003) of wall surface (1001) and rear side wall surface (1002) composition；Rectangle is provided with right above front side wall surface (1001)
Quartz glass window (3005) stirs and make muddy situation and hard for observing and shooting the convection current during test at the double-deck molten bath interface
Shell congealing property；Circular arc wall surface (1003) outside weldings have cooling duct (1004), and cooling duct (1004) bottom is water inlet,
Top is water outlet, and the heat that the double-deck molten bath generates in test section (3) can be taken away after water flowing；Semicircle slice pressure vessel
(3001) top is placed with cover board (3002), and cover board (3002) left and right ends offer cooling water inlet and outlet, water flowing respectively
Nearly quasi-isothermal boundary condition can be provided afterwards for the double-deck molten bath formed in test section (3)；Multilayer electrical heating elements (3003) edge
Horizontal direction is inserted into the lower area of test section (3), for simulating the decay heat in oxidation fusion pond；It is set to test section (3)
Interior temperature measurement component (3004) is used for the Temperature Distribution in each region in precise measurement bilayer molten bath；Third pressure sensor (603) is inserted
Enter in test section (3), for the pressure change in monitoring test section (3).
3. nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system according to claim 1, it is characterised in that:
The molten salt furnace (7) can provide high-temperature molten salt for test section (3), for the lower part oxidation fusion pond in simulated dual-layer molten bath；
Molten salt furnace (7) is connected by the first high-temperature valve (111) and its corresponding pipeline with test section (3), collectively constitutes fused salt injection above
Pipeline section provides channel for fused salt injection；Molten salt furnace (7) upstream arrangement has an extraction valve (121) and vacuum pump (8), under molten salt furnace (7)
Trip is connected by the second high-temperature valve (112) and its corresponding pipeline with test section (3), is collectively constituted fused salt recycling pipeline section above, is
Fused salt recycling provides channel；The 8th thermometer (508) and the 4th pressure gauge (604) wherein installed on molten salt furnace (7) are used respectively
In the temperature and pressure variation in monitoring molten salt furnace (7).
4. nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system according to claim 1, it is characterised in that:
The heat conduction oil tank (9) can provide high temperature heat conductive oil for test section (3), for the upper metallization layer in simulated dual-layer molten bath；
Test section (3) upstream is connected by third high temperature valve (113) and its pipeline with heat conduction oil tank (9), collectively constitutes conduction oil above
Pipeline section is injected, provides channel for conduction oil injection；Test section (3) downstream passes through the 4th high-temperature valve (114) and its pipeline and recycling
Slot (10) is connected, and collectively constitutes conduction oil recycling pipeline section above, provides channel for conduction oil recycling；Wherein in heat conduction oil tank (9)
The 9th thermometer (509) and the 5th pressure gauge (605) of installation are respectively used to the temperature and pressure in monitoring heat conduction oil tank (9) and become
Change.
5. nuclear reactor engineering magnitude bilayer Bath Heat-Transfer characteristic test system according to claim 1, it is characterised in that:
The heating module (11) of the pilot system includes that electric heating wire, pressure regulator and related controller switching equipment, electric heating wire return for fused salt
Road and conduction oil return provide preheating and heat preservation, and heating power is controlled by pressure regulator；The collecting measurement data module
(12) it is mainly used for acquisition characterisitic parameter relevant to record and test；The image collection analysis module (13) is mainly used for clapping
Take the photograph and record heat convection and hard shell congealing property at the double-deck molten bath interface of test section (3)；Control module (14) can be realized
To the remote control of remaining each module and relevant device.
6. the corresponding test method of any one of claim 1 to 5 pilot system, it is characterised in that:, will be pre- before on-test
If the nitrate mixture of molar ratio is fitted into heating fusing in molten salt furnace (7)；Main water is successively opened by control module (14)
Pump (2), cooling tower (5), auxiliary pump (6), heating module (11), collecting measurement data module (12), image collection analysis mould
Block (13)；
When fused salt circuit and conduction oil return are heated to 300 DEG C by heating module (11), the first high-temperature valve is opened
(111), stopped after molten metal pool level reaches 1800mm using gravity by the nitrate injection testing section (3) of high-temperature molten-state
Injection is closed the first high-temperature valve (111)；It opens third high temperature valve (113), using gravity by high temperature heat conductive oil injection testing section
(3) in, stop injection after molten metal pool level is 2000mm, close third high temperature valve (113)；At this moment since above two substance is close
Degree is different and cannot be miscible, and high temperature heat conductive oil will float on the top of molten state nitrate, and the double-deck molten bath is formed in test section (3)
Structure；After testing working medium injection, close heating module (11)；
When test, multilayer electrical heating elements (3003) heat run section (3) lower part fused salt regional simulation oxidation fusion pond is opened, no
Heat run section (3) top conduction oil regional simulation metal layer；It is no longer sent out when temperature measurement component (3004) measures the double-deck bath temperature
Raw significant change, i.e., be acquired record with heat transfer characteristic parameter of the collecting measurement data module (12) to pilot system；It is trying
During testing, image collection analysis module (13) alignment quartz glass window (3005) should be used to shoot at the interface of the double-deck molten bath
Heat convection and hard shell condense situation；
After data acquire, heating module (11) are opened by fused salt circuit and conduction oil return and are heated to 300 DEG C；It opens
The conduction oil of test section (3) top simulation metal layer is drained in accumulator tank (10), closes the 4th by the 4th high-temperature valve (114)
High-temperature valve (114)；It opens extraction valve (121), molten salt furnace (7) is evacuated using vacuum pump (8)；It closes extraction valve (121), opens
The fused salt of second high-temperature valve (112), test section (3) lower part simulation oxidation fusion pond is sucked molten salt furnace under the action of negative pressure again
(7) it in, closes the second high-temperature valve (112)；
After the test, feed pump (2), cooling tower (5), auxiliary pump (6), heating module are closed by control module (14)
(11), collecting measurement data module (12) and image collection analysis module (13).
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Application publication date: 20190326 |