CN107464597A - Hot industry cobalt source anti-leak encapsulating structure and packaging technology - Google Patents
Hot industry cobalt source anti-leak encapsulating structure and packaging technology Download PDFInfo
- Publication number
- CN107464597A CN107464597A CN201710762049.4A CN201710762049A CN107464597A CN 107464597 A CN107464597 A CN 107464597A CN 201710762049 A CN201710762049 A CN 201710762049A CN 107464597 A CN107464597 A CN 107464597A
- Authority
- CN
- China
- Prior art keywords
- seal
- leak
- cobalt
- cobalt source
- former material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 80
- 239000010941 cobalt Substances 0.000 title claims abstract description 80
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000012536 packaging technology Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 71
- 239000002245 particle Substances 0.000 claims abstract description 46
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 20
- 239000007769 metal material Substances 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 abstract description 9
- 210000002381 plasma Anatomy 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000000941 radioactive substance Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000005025 nuclear technology Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
- G21G4/00—Radioactive sources
- G21G4/04—Radioactive sources other than neutron sources
- G21G4/06—Radioactive sources other than neutron sources characterised by constructional features
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Gasket Seals (AREA)
- Glass Compositions (AREA)
Abstract
The present invention relates to a kind of hot industry cobalt source anti-leak encapsulating structure and packaging technology, encapsulating structure includes the seal for the low melting point material sealed up for safekeeping to cobalt particle and the shape metallic leak-proof structure in seal external seal setting.Increase the seal of one layer of low melting point material outside cobalt particle, be easy to cobalt source recycling, avoid when reclaiming cobalt source, due to being cut using modes such as laser, flame or plasmas, and cobalt source is caused to be produced radioaerosol by high temperature, pollute hot cell and environment.
Description
Technical field
The present invention relates to radioactive sealed source, radio isotope, Application of Nuclear Technology field, more specifically to one
Kind hot industry cobalt source anti-leak encapsulating structure and packaging technology.
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.Under defined use environment and use condition, cobalt is put for standard requirement
The safe-use period for penetrating source is limited to 15~20 years.Industrial irradiation is stored within well or dry-well (room) with Co 60 γ sources, 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, rupture, cause cobalt source to be revealed.Usual cobalt source design
Usage time 20 years.Outer envelope weld, slowly corrode in water or in air, the end of term in product longevity or exceed the time limit to be easy to during use
Reveal.Environmental pollution may be caused after cobalt source leakage, it is necessary to terminate its use, accident treatment is costly.
Stainless steel welding is more complicated, and because welding high temperature, thermal stress easily makes cobalt particle overlay coating come off, and generation contains cobalt
Radioaerosol, pollute environment or cause irradiation accident in personnel.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of hot industry cobalt source anti-leak encapsulating structure and envelope
Dress technique.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of hot industry cobalt source anti-leak
Encapsulating structure, including the seal for the low melting point material sealed up for safekeeping to cobalt particle and the seal external seal set
Shape metallic leak-proof structure.
Preferably, the fusing point of the seal is not higher than 700 DEG C.
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 provided between the tip inside of the seal and the cobalt particle.
Preferably, the shape metallic leak-proof structure includes the internal layer involucrum for the metal material being sealed in outside the seal.
Preferably, the shape metallic leak-proof structure also includes the outer layer bag for the metal material being sealed in outside the internal layer involucrum
Shell.
The present invention also constructs a kind of anti-leak packaging technology of hot industry cobalt source, comprises the following steps：
A piece one end open, the seal pipe former material of other end closing are provided；
Load cobalt particle in hot cell in the seal pipe former material；
The open at one end of the seal pipe former material is melted in the hot cell, forms seal the cobalt particle is close
Envelope.
Preferably, before the loading cobalt particle to the seal pipe former material, thermal insulation barriers are added to the seal pipe former material
Closing one end, loading the cobalt particle to after the seal pipe former material, thermal insulation barriers added into the seal pipe former material
Isolate the cobalt particle and open-ended.
Preferably, the other end of the seal pipe former material first melts sealing outside the hot cell.
Preferably, it is arranged the tubular inner layer involucrum former material of metal material outside the seal, and by the internal layer involucrum
Former material end welded seal forms internal layer involucrum, the internal layer involucrum is sealed the seal.
Preferably, it is arranged the tubular outer layer involucrum former material of metal material outside the internal layer involucrum, and by the outer layer bag
Shell former material end welds to form outer layer involucrum, the outer layer involucrum is sealed the internal layer involucrum.
Implement the hot industry cobalt source anti-leak encapsulating structure and packaging technology of the present invention, have below beneficial to effect
Fruit：Increase the seal of one layer of low melting point material outside cobalt particle, avoid when reclaiming cobalt particle, due to using laser, flame
Or plasma mode is cut, and cobalt particle is caused to be produced radioaerosol by high temperature, pollute hot cell and environment.
Further, using the acid-alkali-corrosive-resisting and insulating properties of glass, product reliability can be increased, reduce leakage wind
Danger.Environment is revealed and polluted to radioactive substance after cobalt particle involucrum corrosion failure can be prevented, reduces the probability leaked, extends
Life of product.Cobalt particle recycling is also convenient for, 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, because glass is corrosion-resistant, radioactive substance still can be wrapped up.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the cross-sectional view of the hot industry cobalt source anti-leak encapsulating structure in the embodiment of the present invention.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.
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 sealed up for safekeeping to cobalt particle 1 and the shape metallic leak-proof structure 3 set in the external seal of seal 2,
Cobalt particle 1 is usually high activity Co 60.
Increase the seal 2 of one layer of low melting point material outside cobalt particle 1, utilize the eutectic dot characteristics of seal 2, Ke Yi
During fusing sealing cobalt particle 1, Sealing period is short, and fusion temperature is lower than stainless steel, it is ensured that exempts from the nickel coating on the surface of cobalt particle 1
Go 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 substantially lower than stainless steel, it is also ensured that
Other characteristics of material.
Further, seal 2 is glass material, using the acid-alkali-corrosive-resisting of glass, can increase product reliability, subtract
Few risk of leakage.Environment is revealed and polluted to radioactive substance after the involucrum corrosion failure of cobalt particle 1 can be prevented, reduces what is leaked
Probability, extend life of product.
Increase the seal 2 of one layer of glass material outside cobalt particle 1, be also convenient for the recycling of cobalt particle 1.Avoid returning
When receiving cobalt particle 1, due to cutting involucrum using modes such as laser or plasmas, and cause cobalt particle 1 to be influenceed by high temperature, produce
Radioaerosol, pollute 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 material, extend Sealing period, so as to increase reliability, extend 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 body is formed.
Thermal insulation barriers 4 are provided between the tip inside and cobalt particle 1 of seal 2, by cobalt particle 1 and high temperature during welding every
From avoiding when to end welding cobalt particle 1 by high temperature.
In certain embodiments, shape metallic leak-proof structure 3 includes the internal layer involucrum for the metal material being sealed in outside seal 2
31 and the outer layer involucrum 32 for the metal material being sealed in outside internal layer involucrum 31.Exceeding the time limit to use or using natural decay method
Retired cobalt particle 1, even if two outside layers metal casing still can be wrapped up radioactive substance, significantly reduce and let out by corrosion failure
Reveal radioactive substance risk.
Preferably, the first end plug 33 is respectively equipped with the both ends of internal layer involucrum 31, is set respectively at the both ends of outer layer involucrum 32
There is the second end plug 34, the first end plug 33, the second end plug 34 are sealed in internal layer involucrum 31, outer layer involucrum 32 in end respectively.
In other embodiments, internal layer involucrum 31, the end of outer layer involucrum 32 also can use other cover bodies or platy structure to seal.
The anti-leak packaging technology of strong radiation cobalt particle 1 in a preferred embodiment of the invention comprises the following steps：
A piece one end open, the seal pipe former material of other end closing 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 glass, or fusing point is not higher than 700 DEG C of metal material
Or plastic material.
Preferably, when seal pipe former material uses glass material, it is ensured that the cleaning of seal pipe former material, 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.
Use the opening of flame fusing seal pipe former material, about 700 DEG C of the fusion temperature of simple glass material, glass melting
Temperature is lower than stainless steel, and it is short to melt Sealing period, it is ensured that the nickel coating on the surface of cobalt particle 1 is exempted from destruction, can prevent from welding
Radioactive substance leakage in termination process.
Further, before loading cobalt particle 1 arrives seal pipe former material, closing one end that thermal insulation barriers 4 arrive seal pipe former material is added；
After loading cobalt particle 1 and arriving seal pipe former material, thermal insulation barriers 4 are added into seal pipe former material and isolate cobalt particle 1 and open-ended,
Hyperthermia radiation during welding is avoided to cobalt particle 1.
Generally, there is opening at the both ends of seal pipe former material, can be to block glass tube acquisition, be easy to draw materials.Seal pipe former material
9 millimeters of internal diameter, or other sizes, in addition, glass is cheap, be easy to sintering processing, increase the cost of technology of thin glass tube
It is low.When the both ends of seal pipe former material are opening, sealing is first melted in the one end closed before cobalt particle 1 is loaded outside hot cell.
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.
The former material of tubular inner layer involucrum 31 of metal material is arranged outside seal 2, and the former material end of internal layer involucrum 31 is welded
Connect sealing and form internal layer involucrum 31, internal layer involucrum 31 is sealed seal 2.Further, at the both ends of internal layer involucrum 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 internal layer involucrum 31.
It is arranged the former material of tubular outer layer involucrum 32 of metal material outside internal layer involucrum 31, and by the former material end of outer layer involucrum 32
Welding forms outer layer involucrum 32, outer layer involucrum 32 is sealed internal layer involucrum 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 a negative impact to involucrum.The seal 2 of thin glass is decayed small to cobalt particle 1.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, because glass is corrosion-resistant, it still can wrap up and put
Penetrating property material.The encapsulating structure of the present invention can reduce radioactive release risk.
After completing to encapsulate, the sealing 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.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (12)
1. a kind of hot industry cobalt source anti-leak encapsulating structure, it is characterised in that including to cobalt particle（1）Seal up for safekeeping
The seal of low melting point material（2）And in the seal（2）The shape metallic leak-proof structure that external seal is set（3）.
2. hot industry cobalt source anti-leak encapsulating structure according to claim 1, it is characterised in that the seal
（2）Fusing point be not higher than 700 DEG C.
3. hot industry cobalt source anti-leak encapsulating structure according to claim 1, it is characterised 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.
4. hot industry cobalt source anti-leak encapsulating structure according to claim 1, it is characterised in that the seal
（2）For straight tube, at least one end uses frit seal.
5. hot industry cobalt source anti-leak encapsulating structure according to claim 1, it is characterised in that the seal
（2）Tip inside and the cobalt particle between be provided with thermal insulation barriers（4）.
6. the hot industry cobalt source anti-leak encapsulating structure according to any one of claim 1 to 5, it is characterised in that
The shape metallic leak-proof structure（3）Including being sealed in the seal（2）The internal layer involucrum of outer metal material（31）.
7. hot industry cobalt source anti-leak encapsulating structure according to claim 4, it is characterised in that the metal is close
Seal structure（3）Also include being sealed in the internal layer involucrum（31）The outer layer involucrum of outer metal material（32）.
8. a kind of anti-leak packaging technology of hot industry cobalt source, it is characterised in that comprise the following steps：
A piece one end open, the seal pipe former material of other end closing are provided；Load cobalt particle in hot cell（1）To the seal pipe
In former material；
The seal pipe former material open at one end is melted in the hot cell, forms seal（2）By the cobalt particle（1）It is close
Envelope.
9. the anti-leak packaging technology of hot industry cobalt source according to claim 6, it is characterised in that loading institute
State cobalt particle（1）To before the seal pipe former material, thermal insulation barriers are added（4）To closing one end of the seal pipe former material, loading
The cobalt particle（1）To after the seal pipe former material, thermal insulation barriers are added into the seal pipe former material（4）Isolate the cobalt button
Son（1）With it is open-ended.
10. the anti-leak packaging technology of hot industry cobalt source according to claim 7, it is characterised in that described close
The other end of tube sealing former material first melts sealing outside the hot cell.
11. the anti-leak packaging technology of the hot industry cobalt source according to any one of claim 8 to 10, its feature exist
In in the seal（2）The outer tubular inner layer involucrum for being arranged metal material（31）Former material, and by the internal layer involucrum（31）It is former
Material end welded seal forms internal layer involucrum（31）, make the internal layer involucrum（31）By the seal（2）Sealing.
12. the anti-leak packaging technology of hot industry cobalt source according to claim 11, it is characterised in that described
Internal layer involucrum（31）The outer tubular outer layer involucrum for being arranged metal material（32）Former material, and by the outer layer involucrum（32）Former material end
Welding forms outer layer involucrum（32）, make the outer layer involucrum（32）By the internal layer involucrum（31）Sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762049.4A CN107464597B (en) | 2017-08-30 | 2017-08-30 | Strong-radioactivity industrial cobalt source leakage-proof packaging structure and packaging process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762049.4A CN107464597B (en) | 2017-08-30 | 2017-08-30 | Strong-radioactivity industrial cobalt source leakage-proof packaging structure and packaging process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107464597A true CN107464597A (en) | 2017-12-12 |
| CN107464597B CN107464597B (en) | 2024-06-18 |
Family
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| CN201710762049.4A Active CN107464597B (en) | 2017-08-30 | 2017-08-30 | Strong-radioactivity industrial cobalt source leakage-proof packaging structure and packaging process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108198644A (en) * | 2017-12-29 | 2018-06-22 | 江苏赛诺格兰医疗科技有限公司 | A kind of sealed radioactive source, the preparation facilities of sealed radioactive source and preparation method |
| CN109570795A (en) * | 2018-12-19 | 2019-04-05 | 中国原子能科学研究院 | A kind of high temperature radioactive source welding method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107464597B (en) | 2024-06-18 |
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