CN207895862U - Hot industry cobalt source anti-leak encapsulating structure - Google Patents
Hot industry cobalt source anti-leak encapsulating structure Download PDFInfo
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- CN207895862U CN207895862U CN201721101270.7U CN201721101270U CN207895862U CN 207895862 U CN207895862 U CN 207895862U CN 201721101270 U CN201721101270 U CN 201721101270U CN 207895862 U CN207895862 U CN 207895862U
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- seal
- leak
- cobalt source
- encapsulating structure
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Abstract
The utility model is related to a kind of hot industry cobalt source anti-leak encapsulating structure, encapsulating structure includes being sealed up for safekeeping to cobalt particle and seal of the fusing point not higher than 700 DEG C and the shape metallic leak-proof structure that is arranged in the seal external seal.The seal for increasing by one layer of low melting point material outside cobalt particle, is convenient for cobalt source recycling, avoids when recycling cobalt source, it is cut due to the use of modes such as laser, flame or plasmas, and cobalt source is caused to be generated radioaerosol by high temperature, pollute hot cell and environment.
Description
Technical field
The utility model is related to radioactive sealed source, radioactive isotope, Application of Nuclear Technology fields more specifically to relate to
And a kind of hot industry cobalt source anti-leak encapsulating structure.
Background technology
High activity Co 60 sealed radioactive source standard GB7465-2015 defines the appearance and size requirement of cobalt source, security performance
It is required that.Existing cobalt source is sealed using double-layer stainless steel melting welding.Standard requires under defined use environment and use condition, and cobalt is put
The safe-use period for penetrating source is limited to 15~20 years.Industrial irradiation is stored in the sources Co 60 γ within well or dry-well (room), radiation
Source must return to well or dry-well (room) storage during inoperative.
Water quality impact in by well, cobalt source involucrum are likely to occur corrosion, and rupture causes cobalt source to be revealed.Usual cobalt source design
Usage time 20 years.Outer envelope weld slowly corrodes in water or in air, the end of term in product longevity or exceeds the time limit to be easy to during use
It reveals.It may cause environmental pollution after cobalt source leakage, it is necessary to terminate its use, accident treatment is costly.
Stainless steel welding is more complex, and because welding high temperature, thermal stress easily makes cobalt particle overlay coating fall off, and generates and contains cobalt
Radioaerosol pollutes environment or leads to irradiation accident in personnel.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of hot industry cobalt source anti-leak encapsulation knot
Structure.
Technical solution adopted by the utility model to solve its technical problems is：It is anti-to construct a kind of hot industry cobalt source
Leak encapsulating structure, include cobalt particle is sealed up for safekeeping and fusing point be not higher than 700 DEG C seal and in the seal
The shape metallic leak-proof structure of external seal setting.
Preferably, the seal is glass material；Or, the seal is the metal material that fusing point is not higher than 700 DEG C
Or plastic material.
Preferably, the seal is straight tube, and at least one end uses frit seal.
Preferably, thermal insulation barriers are equipped between the tip inside of the seal and the cobalt particle.
Preferably, the seal is to be formed to the both ends open fusing sealing of pipeline section；Or, the seal is to one end
The open at one end fusing sealing of the test tube shape tube body of opening is formed.
Preferably, the shape metallic leak-proof structure includes the inner envelope for the metal material being sealed in outside the seal.
Preferably, the both ends of the inner envelope are respectively equipped with the first end plug.
Preferably, the shape metallic leak-proof structure further includes the outer layer packet for the metal material being sealed in outside the inner envelope
Shell.
Preferably, the both ends of the outer layer involucrum are respectively equipped with the second end plug.
The hot industry cobalt source anti-leak encapsulating structure for implementing the utility model, has the advantages that：In cobalt
The seal for increasing by one layer of low melting point material outside particle, avoids when recycling cobalt particle, due to the use of laser, flame or plasma
Etc. modes cut, and cause cobalt particle by high temperature, generate radioaerosol, pollute hot cell and environment.
Further, using the acid-alkali-corrosive-resisting of glass and insulating properties, product reliability can be increased, reduce leakage wind
Danger.Environment is revealed and polluted to radioactive substance after can preventing cobalt particle involucrum corrosion failure, reduces the probability leaked, extends
Life of product.It is also convenient for cobalt particle recycling, even if the clad failure of outside shape metallic leak-proof structure, and the glass of internal layer sealing
In the case of the seal of glass material is uncracked, since glass is corrosion-resistant, radioactive substance still can be wrapped up.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the cross-section structure signal of the hot industry cobalt source anti-leak encapsulating structure in the utility model embodiment
Figure.
Specific implementation mode
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
As shown in Figure 1, the hot industry cobalt source anti-leak encapsulating structure in a preferred embodiment of the invention includes
The seal 2 for the glass material that cobalt particle 1 is sealed up for safekeeping and the shape metallic leak-proof structure 3 being arranged in 2 external seal of seal,
Cobalt particle 1 is usually high activity Co 60.
The seal 2 for increasing by one layer of low melting point material outside cobalt particle 1, utilizes the eutectic dot characteristics of seal 2, Ke Yi
When fusing sealing cobalt particle 1, Sealing period is short, and fusion temperature is lower than stainless steel, it is ensured that the nickel coating on 1 surface of cobalt particle is made to exempt from
It goes to pot, can prevent the radioactive substance in welding process from leaking.
Preferably, the fusing point of seal 2 is not higher than 700 DEG C, it is ensured that melting temperature is obviously lower than stainless steel, it is also ensured that
Other characteristics of material.
Further, seal 2 is glass material can increase product reliability, subtract using the acid-alkali-corrosive-resisting of glass
Few risk of leakage.Environment is revealed and polluted to radioactive substance after can preventing 1 involucrum corrosion failure of cobalt particle, what reduction leaked
Probability extends life of product.
The seal 2 for increasing by one layer of glass material outside cobalt particle 1, is also convenient for 1 recycling of cobalt particle.It avoids returning
When receiving cobalt particle 1, involucrum is cut due to the use of modes such as laser or plasmas, and cobalt particle 1 is caused to be influenced by high temperature, is generated
Radioaerosol pollutes hot cell and environment.
In other embodiments, seal 2 or fusing point are not higher than 700 DEG C of metal material or plastic material, play
Contained radioactivity substance extends Sealing period, to increase reliability, extends radioactive source service life, hence it is evident that reduce involucrum
Breakage rate.The seal 2 of metal material can be the meltable materials such as tin.
Seal 2 is straight tube, can be that both ends tap into row sealed set using high temperature melting, i.e. seal 2 is to pipeline section
Both ends open fusing sealing is formed；Or one end sheet as the cuvette construction of sealing, i.e. seal 2 is the examination to one end open
The open at one end fusing sealing of tubulose tube body is formed.
Thermal insulation barriers 4 are equipped between the tip inside and cobalt particle 1 of seal 2, by cobalt particle 1 and high temperature when welding every
From avoiding when to end welding cobalt particle 1 by high temperature.
In some embodiments, shape metallic leak-proof structure 3 includes the inner envelope for the metal material being sealed in outside seal 2
31 and the metal material being sealed in outside inner envelope 31 outer layer involucrum 32.Exceeding the time limit to use or use natural decay method
Retired cobalt particle 1, even if two outside layers metal casing by corrosion failure, still can wrap up radioactive substance, significant decrease is let out
Reveal radioactive substance risk.
Preferably, it is respectively equipped with the first end plug 33 at the both ends of inner envelope 31, is set respectively at the both ends of outer layer involucrum 32
There are the second end plug 34, the first end plug 33, the second end plug 34 to be sealed respectively in end in inner envelope 31, outer layer involucrum 32.
In other embodiments, inner envelope 31, outer layer involucrum 32 end can also be used other cover bodies or platy structure sealing.
The anti-leak packaging technology of strong radiation cobalt particle 1 in a preferred embodiment of the invention includes the following steps：
A piece one end open, the closed seal pipe former material of the other end are provided；
Cobalt particle 1 is encased in seal pipe former material in hot cell；
The open at one end of seal pipe former material is melted in hot cell, seal 2 is formed and seals cobalt particle 1.
With reference to the foregoing description, the material of seal pipe former material can be the metal material that glass or fusing point are not higher than 700 DEG C
Or plastic material.
Preferably, when seal pipe former material uses glass material, it is ensured that the cleaning of seal pipe former material, it can be first to sealing
Pipe former material is cleaned.In addition, the activity of the cobalt particle 1 that the length of seal pipe former material encapsulates as needed makes.
The opening of seal pipe former material, about 700 DEG C of the fusion temperature of simple glass material, glass melting are melted using flame
Temperature is lower than stainless steel, and it is short to melt Sealing period, it is ensured that makes the nickel coating on 1 surface of cobalt particle from destroying, can prevent from welding
Radioactive substance leakage in termination process.
Further, before being packed into cobalt particle 1 to seal pipe former material, closing one end that thermal insulation barriers 4 arrive seal pipe former material is added；
Cobalt particle 1 and open-ended is isolated to thermal insulation barriers 4 after seal pipe former material, are added into seal pipe former material being packed into cobalt particle 1,
Avoid hyperthermia radiation when welding to cobalt particle 1.
In general, there is opening at the both ends of seal pipe former material, can be to block glass tube acquisition, convenient for materials.Seal pipe former material
9 millimeters of internal diameter or other sizes be easy to sintering processing, increase the cost of technology of thin glass pipe in addition, glass is cheap
It is low.When the both ends of seal pipe former material are opening, sealing is first melted in closed one end outside hot cell before being packed into cobalt particle 1.
In other embodiments, seal pipe former material can also only have one end to have opening, and the other end is closing, to open at one end frit seal.
It is arranged 31 former material of tubular inner layer involucrum of metal material outside seal 2, and 31 former material end of inner envelope is welded
It connects sealing and forms inner envelope 31, inner envelope 31 is made to seal seal 2.Further, at the both ends of inner envelope 31 point
Not She You the first end plug 33, the first end plug 33 is welded together to the sealing for realizing end with inner envelope 31.
It is arranged 32 former material of tubular outer layer involucrum of metal material outside inner envelope 31, and by 32 former material end of outer layer involucrum
Welding forms outer layer involucrum 32, and outer layer involucrum 32 is made to seal inner envelope 31.Further, at the both ends of outer layer involucrum 32 point
Not She You the second end plug 34, the second end plug 34 is welded together to the sealing for realizing end with outer layer involucrum 32.
The involucrum of double layer of metal is surrounded by outside glass material side seal body 2, even if during use, the seal 2 of thin glass
Rupture, will not have an adverse effect to involucrum.The seal 2 of thin glass decays to cobalt particle 1 small.Even if two outside layers involucrum is broken
Damage, and in the case of the seal 2 of the glass material of internal layer sealing is uncracked, since glass is corrosion-resistant, it still can wrap up and put
Penetrating property substance.The encapsulating structure of the present invention can reduce radioactive release risk.
After completing to encapsulate, the leakproofness of encapsulation can be detected, surface contamination is tested.
It is to be appreciated that above-mentioned each technical characteristic can be used in any combination and unrestricted.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (9)
1. a kind of hot industry cobalt source anti-leak encapsulating structure, which is characterized in that including to cobalt particle（1）Seal up for safekeeping,
And fusing point is not higher than 700 DEG C of seal（2）And in the seal（2）The shape metallic leak-proof structure of external seal setting（3）.
2. hot industry cobalt source anti-leak encapsulating structure according to claim 1, which is characterized in that the seal
（2）For glass material；Or, the seal（2）700 DEG C of metal material or plastic material are not higher than for fusing point.
3. hot industry cobalt source anti-leak encapsulating structure according to claim 1, which is characterized in that the seal
（2）For straight tube, at least one end uses frit seal.
4. hot industry cobalt source anti-leak encapsulating structure according to claim 1, which is characterized in that the seal
（2）Tip inside and the cobalt particle（1）Between be equipped with thermal insulation barriers（4）.
5. hot industry cobalt source anti-leak encapsulating structure according to claim 1, which is characterized in that the seal
（2）It is formed to melt sealing to the both ends open of pipeline section；Or, the seal（2）For the test tube shape tube body to one end open
Open at one end fusing sealing is formed.
6. hot industry cobalt source anti-leak encapsulating structure according to any one of claims 1 to 5, which is characterized in that
The shape metallic leak-proof structure（3）Including being sealed in the seal（2）The inner envelope of outer metal material（31）.
7. hot industry cobalt source anti-leak encapsulating structure according to claim 6, which is characterized in that the internal layer packet
Shell（31）Both ends be respectively equipped with the first end plug（33）.
8. hot industry cobalt source anti-leak encapsulating structure according to claim 6, which is characterized in that the metal is close
Seal structure（3）Further include being sealed in the inner envelope（31）The outer layer involucrum of outer metal material（32）.
9. hot industry cobalt source anti-leak encapsulating structure according to claim 8, which is characterized in that the outer layer packet
Shell（32）Both ends be respectively equipped with the second end plug（34）.
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| CN201721101270.7U CN207895862U (en) | 2017-08-30 | 2017-08-30 | Hot industry cobalt source anti-leak encapsulating structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464597A (en) * | 2017-08-30 | 2017-12-12 | 中广核研究院有限公司 | Hot industry cobalt source anti-leak encapsulating structure and packaging technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464597A (en) * | 2017-08-30 | 2017-12-12 | 中广核研究院有限公司 | Hot industry cobalt source anti-leak encapsulating structure and packaging technology |
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