CN108109710B - A kind of device and method preparing fusedsalt reactor fuel salt - Google Patents
A kind of device and method preparing fusedsalt reactor fuel salt Download PDFInfo
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- CN108109710B CN108109710B CN201711276155.8A CN201711276155A CN108109710B CN 108109710 B CN108109710 B CN 108109710B CN 201711276155 A CN201711276155 A CN 201711276155A CN 108109710 B CN108109710 B CN 108109710B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
- G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The present invention relates to a kind of devices for preparing fusedsalt reactor fuel salt, including the air supply system and exhaust treatment system being connect with reaction system, the reaction system includes the reaction kettle for being equipped with reducing metal and the reaction heating furnace for being heated to reaction kettle, which includes that inert gas and/or UF are provided into reaction kettle6The air feed equipment of gas, the exhaust treatment system include for excessive UF in adsorption reaction kettle6The processing equipment of gas and tail gas.The present invention also provides a kind of methods for preparing fusedsalt reactor fuel salt using above-mentioned apparatus.The present invention directly restores UF in fused salt6Prepare UF3And/or UF4Obtain fuel salt, simplify the production procedure of fuel salt, have short process flow, flexible, "dead" powder operation easy to operate, saving cost of material, it is energy saving many advantages, such as.
Description
Technical field
The present invention relates to nuclear fuel preparation technical fields, relate more specifically to a kind of dress for preparing fusedsalt reactor fuel salt
It sets and method.
Background technique
Molten salt reactor is unique fluid fuelled reactor in four generation heaps, is mainly characterized by that melting villiaumite is used to fire as core
Expect supporting electrolyte and/or coolant.In liquid fuel molten salt reactor, nuclear fuel is with fluoride (ThF4、UF4Deng) form uniform dissolution
In fluoride molten salt (such as LiF-BeF2) in, constitute the flowable liquid fuel salt without fixed geometry, this flowing fuel
Have burnup it is deep, can online processing many advantages, such as.Early in the civilian nuclear energy starting period in last century, U.S.'s Oak Ridge National Laboratory
Molten salt reactor has been carried out compared with in-depth study in room (ORNL), and establishes unique molten so far in the world with successful operation
Salt experimental reactor (MSRE test), 1970s initial stage is aborted because of the fused salt reactor project of a variety of causes ORNL.But since it is intrinsic
Excellent characteristics, molten salt reactor is in recent years again by global concern.
Molten salt reactor fuel (fuel salt) is molten salt reactor " grain ", it exists in the form of liquid fused salt in reactor,
It is dramatically different with the solid fuel in existing commercial reactor.Related research and development experience is mainly U.S. ORNL in last century 50-70
The technological accumulation in age, the research of other countries is mostly based on this.According to reacter phyics design, fuel salt can have LiF-
BeF2-UF4、LiF-BeF2-UF4-ZrF4Equal various forms.The sixties in last century, the molten salt reactor experiment of U.S. ORNL studied (MSRE)
Using LiF-BeF2-UF4-ZrF4Quaternary fused salt, according to its physical Design, the production method of fuel salt is first to prepare respectively
LiF-BeF2-ZrF4And LiF-UF4Fused salt is mixed to get heap fuel salt LiF-BeF in reactor later2-UF4-ZrF4.Its
Raw materials for production are mainly LiF, BeF2、UF4、ZrF4These types of fluoride, the technological process of production are mainly: powder mixing, congruent melting；
H2/ HF deoxygenation, sulphur removal；H2Restore the metal ion in fused salt；Filtering and impurity removing.ORNL current year is successfully prepared with the technique
The fuel salt of MSRE test reactor.But the technique is with UF4For raw material, and enriched uranium is all initially with UF6Form exists, this just anticipates
Taste first have to that UF will be concentrated6It is converted into UF4Powder, this needs to increase the production and transportation cost of fuel.
Summary of the invention
It is above-mentioned of the existing technology with UF to solve4The problem at high cost of fuel salt, purport of the present invention are prepared for raw material
A kind of device and method preparing fusedsalt reactor fuel salt are being provided.
The present invention provides a kind of device for preparing fusedsalt reactor fuel salt, including the air supply system connecting with reaction system
And exhaust treatment system, the reaction system include being equipped with the reaction kettle of reducing metal and for being heated to reaction kettle
Reaction heating furnace, the air supply system include that inert gas and/or UF are provided into reaction kettle6The air feed equipment of gas, the tail gas
Processing system includes for excessive UF in adsorption reaction kettle6The processing equipment of gas and tail gas.
The device further includes the fused salt supply system connecting with air supply system, which includes fused salt holding vessel
With the fused salt heating furnace for being heated to fused salt holding vessel.
The air feed equipment includes inertial gas tank and UF in parallel6Special gas storage tank, the UF6Special gas storage tank includes storage UF6Gas
Air accumulator.
The air feed equipment includes concatenated inertial gas tank and UF6Gas absorption column.
The processing equipment includes UF6Tail gas adsorption column or UF6Tail gas absorption cold-trap and vent gas treatment tank.
The present invention also provides a kind of methods for preparing fusedsalt reactor fuel salt using above-mentioned apparatus, comprising the following steps:
Villiaumite and reducing metal are placed in the reaction kettle of reaction system by S1, by the inert gas access equipment of air supply system with
Air and water in removal device；S2 heats reaction kettle by reaction heating furnace, by the UF of air supply system6Gas is logical
Enter and carries out redox reaction in reaction kettle, the UF of generation3And/or UF4It is dissolved in fused salt and obtaining containing UF3And/or UF4Fuel
Salt；S3 will be purged in the inert gas access equipment of air supply system.
The step S1 includes being placed in villiaumite in the fused salt holding vessel of fused salt supply system, by fused salt heating furnace to molten
Salt holding vessel is heated, so that the liquid villiaumite force feed after heating melting is into reaction kettle.
The villiaumite in the step S1 is KF-ZrF4、NaF-ZrF4Or LiF-BeF2The co-melting salt of fluoride.
The reducing metal in the step S1 is beryllium, nickel, zirconium, uranium or thorium.
The UF being passed through in reaction kettle in the step S26Gas is from UF6Gas in air feed tank, Huo Zhe
Desorption is from UF at 200-400 DEG C6The gas of gas absorption column.
The reaction gas being passed through in reaction kettle in the step S2 is UF6The mixed gas of gas and inert gas.
The ventilation flow rate of the reaction gas being passed through in reaction kettle in the step S2 is 0.2L/min~20L/min.
In the step S2 is segmentally heating the step of heating to reaction kettle, including is heated to 150 DEG C by room temperature
~250 DEG C of first stage, the second stage for being heated to 380 DEG C~420 DEG C and the phase III for being heated to 500 DEG C~650 DEG C.
In the step S2 includes using atmosphere in inert gas replacement reaction kettle the step of heating to reaction kettle, with
Remove the water generated in heating process.
The temperature of redox reaction in the step S2 is 500 DEG C~650 DEG C.
The pressure of redox reaction in the step S2 is 0.1MPa~0.2MPa.
The step S2 is detected including the use of disengaging gas of the detection device to reaction kettle, when in disengaging gas
UF6When concentration is constant, stopping is passed through UF6Gas.
The present invention directly restores UF in fused salt6Prepare UF3And/or UF4To obtain fuel salt, the production of simplified fuel salt
Process, has that short process flow, flexible, "dead" powder operation easy to operate, to save cost of material, energy saving etc. many
Advantage.Particularly, present invention eliminates UF4Production and transportation process, significantly reduce cost of material；Substantially do not changing work
Under conditions of skill parameter, it is able to produce out in UF3And/or UF4Different UF in solubility and criticality safety tolerance band3And/or
UF4The fuel salt of concentration, so as to neatly meet the different demands of reactor charging；Completely avoid radioactive powder behaviour
Make；Fused salt heating and reaction temperature are relatively low, without dissolving U F at a higher temperature4Solid is reduced to reactor material
Heatproof requirement, and UF6Reduction reaction releases amount of heat, can save the energy.
Detailed description of the invention
Fig. 1 is the schematic diagram of the device for preparing fusedsalt reactor fuel salt according to a preferred embodiment of the present invention；
Fig. 2 is the gas supply system of the device for preparing fusedsalt reactor fuel salt according to a further advantageous embodiment of the invention
The schematic diagram of system；
The XRD test map of the 1 uranium-bearing fused salt obtained for Fig. 3；
The XRD test map of the 2 uranium-bearing fused salts obtained for Fig. 4；
The XRD test map of the 3 uranium-bearing fused salts obtained for Fig. 5.
Specific embodiment
With reference to the accompanying drawing, presently preferred embodiments of the present invention is provided, and is described in detail.
Fig. 1 is the schematic diagram of the device for preparing fusedsalt reactor fuel salt according to a preferred embodiment of the present invention,
The device includes reaction system, fused salt supply system, air supply system and exhaust treatment system, wherein air supply system passes through first
Tracheae 2 is connected to reaction system, and fused salt supply system is connected to reaction system by fused salt pipeline 14, and exhaust treatment system passes through
Second tracheae 4 is connected to reaction system.In the present embodiment, air intake valve 3 is provided on the first tracheae 2, on fused salt pipeline 14
It is provided with fused salt valve 13, is provided with tail gas valve 5 on the second tracheae 4, to switch the connection between each system as needed.Separately
Outside, air supply system can also be attached by pipeline and fused salt supply system, so as to fill to fused salt supply system
It deflates.
The reaction system includes a reaction kettle 8 and a reaction heating furnace 1, thus anti-to this by the reaction heating furnace 1
Kettle 8 is answered to be heated.A reaction pressure meter 6 and a reaction temperature meter 7 are connected on the reaction kettle 8, so as to reaction kettle 8
Interior pressure and temperature carries out real-time monitoring.In the present embodiment, the material of reaction kettle 8 can be stainless steel, and monel metal is breathed out
Family name's alloy or nickel material.
The fused salt supply system includes a fused salt holding vessel 16 and a fused salt heating furnace 15, to be heated by the fused salt
Furnace 15 heats fused salt holding vessel 16.A fused salt pressure gauge 17 and a temperature of molten salt meter are connected on the fused salt holding vessel 16
18, so as to be measured in real time to the pressure and temperature in fused salt holding vessel 16.In the present embodiment, fused salt holding vessel 16
Material can be stainless steel, monel metal, Hastelloy or nickel material.
The air supply system includes inert gas gas circuit and UF in parallel6Gas circuit, wherein be provided in inert gas gas circuit
One inertial gas tank 10 and a gas mass flow meter 12, so as to pass through the gas mass flow meter 12 in gas circuit
The flow of inert gas carries out real-time monitoring.UF6A UF is provided in gas circuit6Special gas storage tank 11 and another gas mass flow meter 12,
So as to pass through another gas mass flow meter 12 to the UF in gas circuit6The flow of gas carries out real-time monitoring.In this reality
It applies in example, the UF6Special gas storage tank 11 includes a storage UF6Air accumulator 9.
It should be understood that the air supply system can be different from above-mentioned configuration, as shown in Fig. 2, including that concatenated inert gas stores up
Tank 10 ' and UF6Gas absorption column 11 ' is provided with a gas matter between the inertial gas tank 10 ' and gas adsorption column 11 '
Measure flowmeter 12 '.The UF6Gas absorption column 11 ' is NaF adsorption column, UF can be desorbed out by heating desorption6Gas.
The exhaust treatment system includes a tail gas adsorption column 19 and a vent gas treatment tank 20.It is filled in the tail gas adsorption column 19
It is filled with fluoride adsorbent, for adsorbing excessive UF6Gas.In the present embodiment, which is preferably
NaF.It should be understood that the tail gas adsorption column 19 is also possible to cold-trap.In the present embodiment, which includes soda lime
Solid sorbent tank, surge tank and lye tourie.Wherein, lye tourie can be the conventional lye to absorb tail gas in this field
Tourie, the lye can be the conventional lye to absorb tail gas in this field, such as KOH or NaOH aqueous solution.
The method for preparing fusedsalt reactor fuel salt according to a preferred embodiment of the present invention includes step S1, will be consolidated
Body villiaumite and reducing metal are placed in the reaction kettle 8 of reaction system, will be in the inertial gas tank 10,10 ' of air supply system
With the air and water in removal device in inert gas access equipment.It should be understood that solid villiaumite can also be placed in fused salt confession
It answers in the fused salt holding vessel 16 of system, and reducing metal is placed in the reaction kettle 8 of reaction system, by the inertia of air supply system
With the air and water in removal device in inert gas access equipment in gas reservoir 10,10 '.At this point, being heated by fused salt
Furnace 15 heats fused salt holding vessel 16, so that the liquid villiaumite force feed after heating melting is into reaction kettle 8.
The villiaumite is the co-melting salt of fluoride, can be KF-ZrF4, the KF and ZrF4Molar ratio be preferably 58:
42；It can be NaF-ZrF4, the NaF and ZrF4Molar ratio be preferably 58:42；It can be LiF-BeF2, described
LiF and BeF2Molar ratio be preferably 67:33.
The reducing metal can be beryllium, nickel, zirconium, uranium or thorium.
The inert gas can be inert gas commonly used in the art, such as argon gas or nitrogen.It is described to use inertia
The mode of air and water in gas removal device is preferably the mode of inert gas replacement, and the displacement preferably carries out 3-
8 times, be most preferably 6 times.
Described the step of fused salt holding vessel 16 is heated by fused salt heating furnace 15 preferably segmentally heating；It is described
Segmentally heating is preferably divided into three phases, and the first stage is preferably heated to 150 DEG C~250 DEG C by room temperature；Second stage by
Temperature at the end of the first stage is heated to 380 DEG C~420 DEG C；Preferably, in the first stage and/or described
In two-stage, after the heating, 2h~5h is kept the temperature；More preferably, in the first stage and/or the second stage knot
Shu Shi, with atmosphere in inert gas replacement fused salt holding vessel, to remove the water generated in heating process.Phase III is by described
Temperature at the end of two-stage is heated to 500 DEG C~650 DEG C；Preferably, after temperature rises to the temperature, heat preservation to the fluorine
Salt solid melts completely；The soaking time is preferably 3h~for 24 hours.
Next, the method comprising the steps of S2, heats reaction kettle 8 by reaction heating furnace 1, to heat reaction
Villiaumite in kettle 8 utilizes the UF of air supply system6Special gas storage tank 11 or UF6Gas absorption column 11 ' is by UF6Gas is passed through in reaction kettle 8
Carry out redox reaction, the UF of generation3And/or UF4It is dissolved in fused salt, obtains containing UF3And/or UF4Fuel salt.
It should be understood that it can be pure UF that this, which is passed through the reaction gas in reaction kettle 8,6, or UF6With inert gas
Mixed gas.When reaction gas is UF6When with inert gas mixed gas, UF6Volume fraction is preferably 2%~50%.UF6
It can be the UF bought6Commodity direct gasification obtains, or is adsorbed with UF6NaF desorption obtain, desorption temperature compared with
It goodly is 200-400 DEG C.The reaction gas ventilation flow rate being passed through in reaction kettle 8 is preferably 0.2L/min~20L/min, makes
Ventilating mode is obtained to be preferably formed as being bubbled.The pipeline of air supply system and the first tracheae 2 is heated, and heating temperature is preferably
It is 70 DEG C~120 DEG C, so that reaction gas is heated before entering reaction kettle 8.
During the reaction, excessive UF6It is adsorbed or is absorbed using tail gas adsorption column 19 or cold-trap, and other tail gas
It is handled using vent gas treatment tank 20.Particularly, the UF for adsorbing or absorbing in tail gas adsorption column 19 or cold-trap6It can be again sharp
With to further reduce the cost.The adsorption temp of the tail gas adsorption column 19 of exhaust treatment system is preferably controlled as 20 DEG C
To 150 DEG C, preferably 100 DEG C.
Described the step of reaction kettle 8 is heated by reaction heating furnace 1 preferably segmentally heating；The segmentation adds
Heat is preferably divided into three phases, and the first stage is preferably heated to 150 DEG C~250 DEG C by room temperature；Second stage is by described
Temperature at the end of one stage is heated to 380 DEG C~420 DEG C；Preferably, in the first stage and/or in the second stage
In, after the heating, keep the temperature 2h~5h；More preferably, at the end of the first stage and/or the second stage,
With atmosphere in inert gas replacement reaction kettle, to remove the water generated in heating process.Phase III is by the second stage knot
Temperature when beam is heated to 500 DEG C~650 DEG C；Preferably, being kept the temperature complete to the villiaumite solid after temperature rises to the temperature
Full-fusing；The soaking time is preferably 3h~for 24 hours.
The temperature of the redox reaction is preferably 500 DEG C~650 DEG C；The time of the reaction is preferably
0.5h-8h；The pressure of the reaction is preferably 0.1MPa~0.2MPa.
The upstream and downstream of reaction kettle 8 can connecting detection device, such as infrared spectrometer, to carry out on-line checking.Particularly, it examines
It surveys device to detect the disengaging gas of reaction kettle 8, as UF in disengaging gas6When concentration is not much different, stop being passed through
UF6。
Next, the method comprising the steps of, S3 will be in the inertial gas tank 10,10 ' of air supply system after reaction stops
Inert gas access equipment in purged.The inert gas can be inert gas commonly used in the art, preferably
Ground is argon gas, nitrogen；Purge flow rate is preferably 0.5L/min~20L/min；Purge time is preferably 0.5-2h.
Example 1
By 400g solid villiaumite LiF-BeF2(67-33mol%) is placed in fused salt holding vessel 16, covers cover, uses straight argon
Atmosphere in gas displacement fused salt holding vessel.Fused salt holding vessel 16 is heated, temperature is made, to after 200 DEG C, to keep the temperature 2h by room temperature；Heat preservation
At the end of with atmosphere in pure argon displacement fused salt holding vessel；Fused salt holding vessel 16 is heated again, is warming up to temperature by 200 DEG C
After 400 DEG C, 2h is kept the temperature；It is generated again with atmosphere in pure argon displacement fused salt holding vessel with removing in heating process at the end of heat preservation
Water.Fused salt holding vessel 16 is heated again, and temperature is made to reach 550 DEG C；4h is kept the temperature, until villiaumite melts completely.
12g reducing metal Be piece is placed in reaction kettle 8, kettle cover is covered, with atmosphere in pure argon replacement reaction kettle.Add
Thermal response kettle 8 makes temperature reach 550 DEG C.Lead to pressure into fused salt holding vessel 16, by the liquid fused salt force feed of in-pot melting to anti-
It answers in kettle 8.UF is passed through in molten fluoride fused salt into reaction kettle 86- Ar gaseous mixture (UF6Volume fraction be 4%), use
Fourier infrared spectrograph is monitored the disengaging gas of reaction kettle 8.Reaction carries out 4h altogether.
It is changed to be purged using argon gas after reaction, purge flow rate 2L/min, stop after purging 1h.Stop adding
Heat is cooled to room temperature to fused salt, is opened reaction kettle 8 and is taken out fused salt, and through detecting, U content is 8.1wt% in the fused salt after reaction,
UF6Utilization rate is about 53%.Fused salt after reaction carries out XRD, and testing result is as shown in figure 3, UF6It is reduced into as UF3。
Example 2
By 450g solid villiaumite KF-ZrF4(58-42mol%) and 68g reducing metal nickel wire, is placed in reaction kettle 8, lid
Upper kettle cover, with atmosphere in pure nitrogen gas replacement reaction kettle.Reaction kettle 8 is heated, temperature is made, to after 200 DEG C, to keep the temperature 2h by room temperature；
With atmosphere in pure nitrogen gas replacement reaction kettle at the end of heat preservation；Reaction kettle 8 is heated again, and temperature is made to be warming up to 400 DEG C by 200 DEG C
Afterwards, 2h is kept the temperature；Atmosphere in pure nitrogen gas replacement reaction kettle is used at the end of heat preservation, again to remove the water generated in heating process.
Continue to heat reaction kettle 8, temperature is made to reach 500 DEG C；6h is kept the temperature, until fused salt melts completely.It is adsorbed with UF6NaF
Adsorption column 11 ' is heated to 400 DEG C and is desorbed, and is carried using nitrogen, flow 1L/min.Contain UF6Nitrogen pair
The villiaumite melted in reaction kettle 8 is bubbled, and is supervised using disengaging gas of the Fourier infrared spectrograph to reaction kettle 8
It surveys.Reaction carries out 5h.
It is changed to be purged using nitrogen after reaction, purge flow rate 2L/min, stop after purging 0.5h.Stop adding
Heat is cooled to room temperature to fused salt, is cooled to room temperature to fused salt, is opened reaction kettle 8 and is taken out fused salt, the fused salt through detecting, after reaction
Middle U content is 8.3wt%, UF6Utilization rate is about 62%.Fused salt after reaction carries out XRD detection, as a result as shown in figure 4, UF6Quilt
Reduction becomes UF4。
Example 3
By 500g solid villiaumite NaF-ZrF4(58-42mol%), reducing metal 6g zirconium piece and 55g nickel wire are placed in together
In reaction kettle 8, kettle cover is covered, with atmosphere in pure argon replacement reaction kettle.Reaction kettle 8 is heated, temperature is made to reach 600 DEG C；Heat preservation
3h, until fused salt melts completely.It is adsorbed with UF6NaF adsorption column 11 ' be heated to 400 DEG C and be desorbed, and carried using argon gas
Band, flow 3L/min.Contain UF6Argon gas the villiaumite melted in reaction kettle 8 is bubbled, using FTIR spectrum
Instrument is monitored the disengaging gas of reaction kettle 8.Reaction carries out 6h.
It is changed to be purged using argon gas after reaction, purge flow rate 1L/min, stop after purging 0.5h.Stop adding
Heat is cooled to room temperature to fused salt, is opened reaction kettle 8 and is taken out fused salt, and through detecting, U content is 9.9wt% in the fused salt after reaction,
UF6Utilization rate is about 70%.Fused salt after reaction carries out XRD testing result, as shown in figure 5, UF6It is reduced into as UF3And UF4。
Above-described, only presently preferred embodiments of the present invention, the range being not intended to limit the invention, of the invention is upper
Stating embodiment can also make a variety of changes.Made by i.e. all claims applied according to the present invention and description
Simply, equivalent changes and modifications fall within the claims of the invention patent.The not detailed description of the present invention is
Routine techniques content.
Claims (10)
1. a kind of device for preparing fusedsalt reactor fuel salt, which is characterized in that including the air supply system being connect with reaction system
And exhaust treatment system, the reaction system include being equipped with the reaction kettle of villiaumite and reducing metal and for carrying out to reaction kettle
The reaction heating furnace of heating, the villiaumite are KF-ZrF4、NaF-ZrF4Or LiF-BeF2The co-melting salt of fluoride, the reproducibility
Metal is beryllium, nickel, zirconium, uranium or thorium, which includes that inert gas and UF are provided into reaction kettle6The gas supply of gas is set
Standby, which includes for excessive UF in adsorption reaction kettle6The processing equipment of gas and tail gas, the air feed equipment
Including concatenated inertial gas tank and UF6Gas absorption column, desorption is from UF at 200-400 DEG C6The UF of gas absorption column6
Gas, which is passed through in reaction kettle, carries out redox reaction, the UF of generation3And/or UF4It is dissolved in villiaumite and obtaining containing UF3And/or UF4
Fuel salt.
2. the apparatus according to claim 1, which is characterized in that the device further includes the fused salt supply connecting with air supply system
System, the fused salt supply system include fused salt holding vessel and the fused salt heating furnace for being heated to fused salt holding vessel.
3. the apparatus according to claim 1, which is characterized in that the processing equipment includes UF6Tail gas adsorption column or UF6Tail gas
Absorb cold-trap and vent gas treatment tank.
4. a kind of method for preparing fusedsalt reactor fuel salt using the device of any of claims 1-3, feature
It is, comprising the following steps:
Villiaumite and reducing metal are placed in the reaction kettle of reaction system by S1, by the inert gas access equipment of air supply system
In with the air and water in removal device；
S2 heats reaction kettle by reaction heating furnace, by the UF of air supply system6Gas is passed through in reaction kettle and is aoxidized
Reduction reaction, the UF of generation3And/or UF4It is dissolved in fused salt and obtaining containing UF3And/or UF4Fuel salt；
S3 will be purged in the inert gas access equipment of air supply system.
5. according to the method described in claim 4, it is characterized in that, the step S1 includes that villiaumite is placed in fused salt supply system
Fused salt holding vessel in, fused salt holding vessel is heated by fused salt heating furnace, so that the liquid villiaumite pressure after heating melting
It send into reaction kettle.
6. according to the method described in claim 4, it is characterized in that, the reaction gas being passed through in reaction kettle in the step S2
For UF6The mixed gas of gas and inert gas.
7. according to the method described in claim 6, it is characterized in that, the reaction gas being passed through in reaction kettle in the step S2
Ventilation flow rate be 0.2L/min~20L/min.
8. according to the method described in claim 4, it is characterized in that, in the step S2 the step of heating to reaction kettle
For segmentally heating, including the second-order for being heated to 150 DEG C~250 DEG C of first stage by room temperature, being heated to 380 DEG C~420 DEG C
Section and the phase III for being heated to 500 DEG C~650 DEG C.
9. according to the method described in claim 4, it is characterized in that, the temperature of the redox reaction in the step S2 is
500 DEG C~650 DEG C, pressure is 0.1MPa~0.2MPa.
10. according to the method described in claim 4, it is characterized in that, the step S2 is including the use of detection device to reaction kettle
Disengaging gas detected, when disengaging gas in UF6When concentration is constant, stopping is passed through UF6Gas.
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| CN109065196B (en) * | 2018-07-27 | 2019-12-20 | 中国科学院上海应用物理研究所 | Preparation device and preparation method of molten salt reactor liquid fuel |
| CN109637682B (en) * | 2018-11-05 | 2020-09-04 | 中国科学院上海应用物理研究所 | Method for reconstructing molten salt reactor fuel |
| CA3150484A1 (en) * | 2019-09-10 | 2021-03-18 | Luke C. Olson | Electrochemical uranium nitride production |
| CN110721645B (en) * | 2019-10-21 | 2022-01-25 | 山东京博石油化工有限公司 | Environment-friendly purging device and method for ethylbenzene reactor |
| WO2021092401A1 (en) | 2019-11-08 | 2021-05-14 | Abilene Christian University | Identifying and quantifying components in a high-melting-point liquid |
| CN112390290A (en) * | 2020-11-20 | 2021-02-23 | 中核北方核燃料元件有限公司 | High-purity UF for thorium-based molten salt reactor4Preparation method |
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