CN109870553A - A kind of uranium foil dissolution experiment device - Google Patents
A kind of uranium foil dissolution experiment device Download PDFInfo
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- CN109870553A CN109870553A CN201910202120.2A CN201910202120A CN109870553A CN 109870553 A CN109870553 A CN 109870553A CN 201910202120 A CN201910202120 A CN 201910202120A CN 109870553 A CN109870553 A CN 109870553A
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- sampling
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- dissolving tank
- experiment device
- sampler
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Abstract
The invention discloses a kind of uranium foil dissolution experiment devices, including dissolving tank and sampler；Sampler includes sampling cock, shell, probe tube and sampling tube control flap；Probe tube is connected to interior of shell and connects with sampling tube control flap control；The interior of shell and sampler inner cavity airtight connection；Sampling groove is provided on the sampling cock；The sampling cock can be moved along the interior of shell so that the sampling groove protrudes into the dissolving tank sampling or the sampling groove is made to retract the interior of shell to be connected to the probe tube.Beneficial effects of the present invention are as follows: dissolver of the invention samples at any time in the state that dissolving tank is closed, avoid the loss of experimental data, it is applicable not only to uranium foil dissolution studies, it is also applied for the sampling experiment of the chemical reaction under other high temperature and pressure, in course of dissolution, without opening dissolving tank, sample detection condition can be provided to complete to be formed with process flow to monitor the process that uranium foil dissolves at any time.
Description
Technical field
The present invention relates to nuclear chemical industry field, a kind of specific uranium foil dissolution experiment device.
Background technique
99Mo is a kind of artificial radionuclide, half-life period 66h, and decay obtains99mTc。99mTc is answered in modern nuclear medicine
With widest isotope,99mTc drug accounts for clinical with 80% or more of radiodiagnosis drug.
Currently, global99Mo mainly by from235It is extracted in U fission product, nuclear reaction:235U(n,f)99Mo。
It is fissioned using slightly enriched uranium target piece and the production of high-enriched uranium target piece99The main distinction of Mo is: if production same amount99Mo, the content of uranium is 5-6 times of high-enriched uranium (uranium 235 content > 93%) target piece in slightly enriched uranium (uranium 235 content < 20%) target.U
The increase of amount brings problem to target processed and the work of molten target.
For slightly enriched uranium target piece using the target piece of uranium foil form, the dissolution of target piece is the dissolution to the pure uranium of slightly enriched uranium foil.?
It needs to be measured experiment to uranium foil lysate at any time in technical study, to obtain the data such as kinetics of uranium dissolution.It is pure
The purity of uranium is up to 99.995%, density 19.05g/cm3, easily oxidation dissolution is in acid in air, to alkaline solution in lazy
Property, but density is larger, and the dissolution under mono-crystalline structures normal temperature and pressure in acid is slow.It is exothermic reaction that uranium foil, which is dissolved in acid, dissolution
Rate is related with temperature, pressure and acidity, can be by increasing reaction temperature, increasing reaction pressure, spy in order to improve rate of dissolution
It is not the concentration of raising lysate acid to improve the dissolution reaction rate of pure uranium.This needs dissolution experiment repeatedly that could obtain can
The condition data leaned on, with ensure in course of dissolution safety, quickly reach it is desirable that requirement.
Nitric acid is to can generate a large amount of NO in the course of dissolution of uranium2With NO gas, dissolution experiment be also high temperature (100~
150 DEG C) and elevated pressures (2~3atm) under carry out, and uranium is that volatilization under radioactive substance high temperature can cause to put to environment
Radioactive pollution, so, the dissolution of uranium is carried out in the canister of totally-enclosed, forbids sampling collection number of uncapping in course of dissolution
According to.
Lacking in the prior art covered in course of dissolution can sample the experimental provision for collecting data.
In view of this, the present invention is specifically proposed.
Summary of the invention
In view of the deficiencies in the prior art, the object of the present invention is to provide a kind of uranium foil dissolution experiment devices, at least
It can be realized and realize that the function of data is collected in sampling in the case where covered.
Technical scheme is as follows:
A kind of uranium foil dissolution experiment device, including dissolving tank and sampler；The sampler include sampling cock, shell,
Probe tube and sampling tube control flap；The probe tube is connected to the interior of shell and controls with the sampling tube control flap
Connection；The interior of shell and sampler inner cavity airtight connection；Sampling groove is provided on the sampling cock；The sampling
Piston can be moved along the interior of shell so that the sampling groove protrudes into the dissolving tank sampling or retracts the sampling groove
The interior of shell is connected to the probe tube.
Further, above-mentioned uranium foil dissolution experiment device, the sampler further include reset spring, stop nut and outer
Sealing nut；The external seal nut is installed on outside the shell；The stop nut is installed on the sampling cock；It is described
Reset spring both ends are connect with the stop nut and external seal nut respectively so that the sampling cock resets；The sampling is lived
Plug is connect across the external seal nut with handle.
Further, above-mentioned uranium foil dissolution experiment device, the shell includes inside and outside shell flange and outer housing flange；Institute
It states inside and outside shell flange and the dissolving tank airtight connection is integral；The inside and outside shell flange and outer housing flange airtight connection.
Further, above-mentioned uranium foil dissolution experiment device, the inside and outside shell flange are close by bolt with outer housing flange
Close connection.
Further, above-mentioned uranium foil dissolution experiment device, close to the position at the sampling groove both ends on the sampling cock
Set the sealing ring being respectively arranged with shell cooperation.
Further, above-mentioned uranium foil dissolution experiment device further includes tail gas absorption holding vessel and for recycling in tail gas
The reflux unit of vapor；The dissolving tank, reflux unit and tail gas absorption holding vessel are sequentially connected.
Further, above-mentioned uranium foil dissolution experiment device is additionally provided with heater in the dissolving tank.
Further, above-mentioned uranium foil dissolution experiment device, the sampler are connected to the dissolving tank lower part.
Beneficial effects of the present invention are as follows:
Dissolver of the invention samples at any time in the state that dissolving tank is closed, avoids the loss of experimental data, no
Uranium foil dissolution studies are only applicable to, the sampling experiment of the chemical reaction under other high temperature and pressure are also applied for, in course of dissolution
In, do not have to open dissolving tank, sample detection can be mentioned at any time with monitoring the process that uranium foil dissolves for completion and process flow sizing
Condition is supplied.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of uranium foil dissolution experiment device of the invention.
Fig. 2 is the semi-section structural schematic diagram of uranium foil dissolution experiment device of the invention.
Fig. 3 is the structural schematic diagram of sampler in the present invention.
Fig. 4 is schematic diagram of the sampling cock at B.
Fig. 5 is schematic diagram of the sampling cock at A.
Fig. 6 is the schematic diagram for collecting sample.
In above-mentioned attached drawing, 1, sampler；2, dissolving tank；3, dissolving tank sealing cover；4, reflux unit；5, exhaust gas collecting pipe；
6, sampling cock；7, sampling groove；8, inside and outside shell flange；9, outer housing flange；10, reset spring；11, external seal nut；12, hand
Handle；13, stop nut；14, gasket；15, bolt；16, tube control flap is sampled；17, probe tube；18, sealing ring；19, it receives
Collect bottle.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of uranium foil dissolution experiment device, including dissolving tank 2 and sampler 1；It is described
Sampler 1 includes sampling cock 6, shell, probe tube 17 and sampling tube control flap 16；The probe tube 17 is connected to described outer
It controls inside shell and with the sampling tube control flap 16 and connects.For convenient for sampling, the sampler is connected to the dissolving tank 2
Lower part, dissolving tank sealing cover 3 are at the top of hermetically sealed can.
As shown in Figures 2 and 3, the interior of shell and the 1 inner cavity airtight connection of sampler；On the sampling cock 6
It is provided with sampling groove 7；The sampling cock 6 can be moved along the interior of shell so that the sampling groove 7 protrudes into the dissolution
Tank 2 samples or so that the sampling groove 7 is retracted the interior of shell to be connected to the probe tube 17.The sampler 1 further includes multiple
Position spring 10, stop nut 13 and external seal nut 11；The external seal nut 11 is installed on outside the shell；The limit spiral shell
Mother 13 is installed on the sampling cock 6；10 both ends of reset spring respectively with the stop nut 13 and external seal nut
11 connect so that the sampling cock 6 resets；The sampling cock 6 passes through the external seal nut 11 and connect with handle 12.
The shell includes inside and outside shell flange 8 and outer housing flange 9；The inside and outside shell flange 8 and the dissolving tank 2 are closed
It links into an integrated entity (using the connection type of welding in the present embodiment)；The inside and outside shell flange 8 and the closed company of outer housing flange 9
It connects.Position on the sampling cock 6 close to 7 both ends of sampling groove is respectively arranged with the sealing ring with shell cooperation
18。
The insertion of sampling cock 6 is mounted in inside and outside shell flange 8, then the outer housing flange 9 of housing, using bolt 15 by inside and outside shell
Flange 8 and outer 9 airtight connection of housing flange, then successively install gasket 14, reset spring 10 and spring retainer nut 13,
Finally install the handle 12 of external seal nut 11 and sampling cock 6.Sampling cock 6 can be in housing flange in sealing state
It is lower freely to twitch, it can be advanced into dissolving tank 2 and be sampled work.Reset spring 10 is set on sampling cock 6, by pacifying
It is fixed mounted in 6 upper limit nut 13 of sampling cock, sampling is lived in the reset spring 10 without sampling work, sampling cock 6
Plug 6 resets at the initial sealing state parallel with dissolving tank 2, will not impact to the volume of dissolving tank 2.On sampling cock 6
Process and assemble has multiple sealing rings resistant to high temperature 18, to guarantee the airtightness of sampler 1, is in particular arranged at close to the sampling
The position at 7 both ends of slot.6 front of sampling cock is machined with quantitative circulating type sampling groove 7, the initial sealing state with sampling groove 7
It is welded with probe tube 17 on the corresponding inside and outside shell flange 8 in position, sample in sampling groove 7 is controlled by sampling tube control flap 16
Discharge.
In Fig. 1, uranium foil dissolution experiment device of the invention further includes tail gas absorption holding vessel and for recycling water in tail gas
The reflux unit 4 of steam；The dissolving tank 2, reflux unit 4 and tail gas absorption holding vessel are sequentially connected.It is produced in course of dissolution
Angry body is expelled to tail gas absorption holding vessel, reflux dress by reflux unit 4 to the exhaust gas collecting pipe 5 for being mounted on 2 top of dissolving tank
The effect for setting 4 is condensed to recycle the vapor for heating molten uranium and generating in the process, to keep the volume of lysate.And tail gas absorption
Holding vessel is temporary, the radioactivity volatile substance that may be present in generation gas during heating for dissolving, to avoid to environment
Pollution, the gas generated during heating for dissolving are all stored in tail gas holding vessel, and data collection is completed in reaction to be dissolved
Afterwards, absorption cleaning processing is carried out.
In the present embodiment, dissolving tank 2 is process by stainless steel material.Dissolving tank 2 is connected with pressure-limiting check valve, works as dissolution
Automatic to be connected when gas pressure is more than preset value in tank 2, discharge part gas keeps dissolution reaction pressure, derived gas warp
Reflux unit 4 is crossed into gas storage tank.Temperature needed for heater can control course of dissolution by thermal resistance keeps target piece molten
Solution accelerates.
Dissolver of the invention samples at any time in the state that dissolving tank 2 is closed, avoids the loss of experimental data, no
Uranium foil dissolution studies are only applicable to, the sampling experiment of the chemical reaction under other high temperature and pressure are also applied for, in course of dissolution
In, without opening dissolving tank 2, sample detection can be formed at any time with monitoring the process that uranium foil dissolves for completion and process flow
Provide condition.
In course of dissolution, sampling cock 6 is in A when sampler 1 does not work, the dissolution in sampling groove 7 and dissolving tank 2
The closed isolation of liquid, as shown in Figure 2 and Figure 5.When needing to sample, propelling piston handle 12 is in B, by 6 front of sampling cock
Sampling groove 7 is advanced into dissolving tank 2, allows lysate to be filled in sampling groove 7, as shown in Figure 4.After liquid to be dissolved is full of sampling groove 7,
Retract sampling cock 6, handle 12 is resetted in A, sampling groove 7 with the lysate in dissolving tank 2 is closed is isolated, by samples taken section
It stays in sampling groove 7 and takes out of, as shown in Figure 5.Then sampling tube control flap 16 is opened, the sample in sampling groove 7 will be left and taken
It is collected in receiving flask 19 by probe tube 17, as shown in Figure 6.When sampling, 12 advance distance of piston handle just lives sampling
It fills in 6 fronts to promote in dissolving tank 2, sampling groove 7 is visited into 1mm in dissolving tank 2, so that lysate is filled in sampling groove 7.When not sampling
Reset spring 10 can reset sampling cock 6, limit sampling cock 6 in A, to prevent sampling cock 6 by external seal nut 11
Disengaging causes sampler to leak, and sampler 1 is sealed by sealing rings 18 resistant to high temperature multiple on sampling cock 6, to guarantee sampler 1
Airtightness.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.If in this way, belonging to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention
Within enclosing, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of uranium foil dissolution experiment device, it is characterised in that: including dissolving tank and sampler；The sampler includes that sampling is lived
Plug, shell, probe tube and sampling tube control flap；The probe tube is connected to the interior of shell and controls with the probe tube
Valve control connection；The interior of shell and sampler inner cavity airtight connection；Sampling groove is provided on the sampling cock；
The sampling cock can be moved along the interior of shell so that the sampling groove protrudes into the dissolving tank sampling or makes described take
Sample slot retracts the interior of shell to be connected to the probe tube.
2. uranium foil dissolution experiment device as described in claim 1, it is characterised in that: the sampler further include reset spring,
Stop nut and external seal nut；The external seal nut is installed on outside the shell；The stop nut is installed on described take
On sample piston；The reset spring both ends are connect with the stop nut and external seal nut respectively so that the sampling cock is multiple
Position；The sampling cock passes through the external seal nut and connect with handle.
3. uranium foil dissolution experiment device as claimed in claim 2, it is characterised in that: the shell includes inside and outside shell flange and outer
Housing flange；The inside and outside shell flange and the dissolving tank airtight connection are integral；The inside and outside shell flange and outer housing flange
Airtight connection.
4. uranium foil dissolution experiment device as claimed in claim 3, it is characterised in that: the inside and outside shell flange and outer housing flange
Pass through bolt airtight connection.
5. the uranium foil dissolution experiment device as described in claim 1-4 is any, it is characterised in that: close to institute on the sampling cock
The position for stating sampling groove both ends is respectively arranged with the sealing ring cooperated with the shell.
6. the uranium foil dissolution experiment device as described in claim 1-4 is any, it is characterised in that: further include tail gas absorption holding vessel
With the reflux unit for recycling vapor in tail gas；The dissolving tank, reflux unit and tail gas absorption holding vessel are sequentially connected.
7. the uranium foil dissolution experiment device as described in claim 1-4 is any, it is characterised in that: be additionally provided in the dissolving tank
Heater.
8. the uranium foil dissolution experiment device as described in claim 1-4 is any, it is characterised in that: the sampler is connected to described
Dissolving tank lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910202120.2A CN109870553B (en) | 2019-03-18 | 2019-03-18 | Uranium foil dissolves experimental apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910202120.2A CN109870553B (en) | 2019-03-18 | 2019-03-18 | Uranium foil dissolves experimental apparatus |
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| CN109870553A true CN109870553A (en) | 2019-06-11 |
| CN109870553B CN109870553B (en) | 2021-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892409A (en) * | 2021-01-20 | 2021-06-04 | 中国原子能科学研究院 | Uranium aluminum alloy target dissolving device |
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| CN105506274A (en) * | 2015-11-24 | 2016-04-20 | 中国原子能科学研究院 | Uranium foil dissolving device for irradiated LEU (low-enriched uranium) foil target |
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| JP2000291924A (en) * | 1999-04-01 | 2000-10-20 | Hitachi Ltd | Melting apparatus |
| JP2009133701A (en) * | 2007-11-30 | 2009-06-18 | Toshiba Corp | Criticality safety control method for continuous dissolver in reprocessing facility |
| CN202215241U (en) * | 2011-08-11 | 2012-05-09 | 中国石油化工股份有限公司 | High-temperature high-pressure airtight sampling device for ultra-deep ultra-thick oil well |
| EP2602607A2 (en) * | 2011-10-21 | 2013-06-12 | Korea Institute of Geoscience and Mineral Resources (KIGAM) | Apparatus for testing dissolution of a mineral |
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| CN112892409A (en) * | 2021-01-20 | 2021-06-04 | 中国原子能科学研究院 | Uranium aluminum alloy target dissolving device |
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| CN109870553B (en) | 2021-04-02 |
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