CN209374067U - A kind of secondary neutron source rod reducing tritium discharge - Google Patents
A kind of secondary neutron source rod reducing tritium discharge Download PDFInfo
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- CN209374067U CN209374067U CN201821986566.6U CN201821986566U CN209374067U CN 209374067 U CN209374067 U CN 209374067U CN 201821986566 U CN201821986566 U CN 201821986566U CN 209374067 U CN209374067 U CN 209374067U
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- neutron source
- tritium
- secondary neutron
- source rod
- end plug
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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 utility model provides a kind of secondary neutron source rod of reduction tritium discharge, it is characterized in that, the coating resistance tritium coating on the cladding tubes of the secondary neutron source rod, or placing nickel plating to inhale tritium material or the interior cladding materials in the cladding tubes is zircaloy, above-mentioned three kinds of modes also can be used in combination.The tritium that itself is generated can be deposited in stick by secondary neutron source rod provided by the utility model, and tritium discharge amount is effectively reduced, and reduce the tritium level in coolant, mitigate environmental pollution.
Description
Technical field
The utility model relates to a kind of secondary neutron source rods of reduction tritium discharge.
Background technique
The main function of secondary neutron source rod is that the secondary neutron source by being loaded in stick is filled in the fuel of following cycle
Carry, shutdown and the reactor cores neutron flux such as critical it is lesser during, provide a primary neutron level for ex-core instrumentation.
In the starting of first reactor core, primary neutron level is provided by primary neutron source.Secondary neutron source rod can be inserted separately into fuel assembly
It uses, can also be fitted into secondary neutron source component and use.Secondary neutron source component is usually by compacting part underhung secondary
Component stick and resistance stopper or other associated component sticks composition.When reactor operation, secondary neutron source rod is inserted in fuel assembly
Fixed, usually secondary source rod is inserted in fuel assembly guide pipe.
Nuclear reactor secondary neutron source rod structure is substantially similar in the world, including single layer involucrum secondary neutron source rod and bilayer
Two kinds of involucrum secondary neutron source rod is made of single or double layer cladding tubes cladding secondary neutron source respectively, and both ends are close by end plug
Envelope.Now widely used secondary neutron source is Sb-Be material, reacts given-ioff neutron by Be (γ, n).Stable isotope Sb
Sb-122 and Sb-124 is generated by neutron irradiation under reactor core normal operation, the decay of Sb-122 and Sb-124 generate gamma-ray
Ray provides gamma-rays for Be (γ, n) reaction.Secondary neutron source rod would generally use multiple circulations in nuclear reactor, by heap
The material of the influence of core use environment and service life, cladding tubes and end plug is usually stainless steel.Secondary neutron source component knot
As shown in figure 1 and 2, secondary neutron source rod is as shown in figures 3 and 4 for structure.
Sb-Be material can generate tritium after reacting in-pile irradiation, and tritium permeates in Stainless Steel Cladding used at present
It measures very high, it is easy to enter coolant across cladding tubes.Radioactivity tritium is entered by cladding tubes will cause coolant in coolant
Pollution, tritium once enter coolant, because it is almost the same with ordinary hydrogen in physics and chemically, are difficult to remove, can be with anti-
Waste water or steam waste discharge in heap is answered to cause environmental pollution to outside.
Therefore, how to provide it is a kind of the tritium that itself is generated can be deposited in stick, be effectively reduced tritium discharge amount, reduce cooling
Tritium level in agent, the secondary neutron source rod for mitigating environmental pollution become urgent problem to be solved.
Utility model content
The utility model in view of the deficiencies of the prior art, proposes a kind of secondary neutron source rod of reduction tritium discharge, feature
It is, coating resistance tritium coating or the placement nickel plating suction tritium material in the cladding tubes on the cladding tubes of the secondary neutron source rod
Or use zircaloy inner envelope pipe.The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that described time
Grade neutron source rod is single layer involucrum secondary neutron source rod, is made of cladding tubes cladding secondary neutron source material, the involucrum
The both ends of pipe are sealed by the first end plug and the second end plug, and the resistance tritium coating is coated on the cladding tubes.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that the secondary neutron source rod is double
Layer involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source material by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends pass through
First end plug and the sealing of the second end plug, coat the resistance tritium coating on the interior involucrum.
The secondary neutron source rod for reducing tritium discharge, which is characterized in that the resistance tritium coating material is
Cr2O3、Al2O3、ZrO2, SiC or other materials with Tritium Resistivity.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that the secondary neutron source rod is double
Layer involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source material by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends pass through
First end plug and the sealing of the second end plug, the interior cladding materials are zircaloy, and the outsourcing shell material is stainless steel.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that the secondary neutron source rod is single
Layer involucrum secondary neutron source rod is made of cladding tubes cladding secondary neutron source material, and the both ends of the cladding tubes pass through the
One end plug and the sealing of the second end plug place the nickel plating in the cladding tubes and inhale tritium material, and tritium material is inhaled in the nickel plating to be put
It sets above or below the secondary neutron source material.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that the secondary neutron source rod is double
Layer involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source material by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends pass through
First end plug and the sealing of the second end plug, the nickel plating is placed in the outer envelope or interior cladding tubes and inhales tritium material.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that tritium material is inhaled in the nickel plating to be set
It is placed between the outer envelope and the interior involucrum, is located above or below the interior involucrum.
The preferred secondary neutron source rod for reducing tritium discharge, which is characterized in that tritium material is inhaled in the nickel plating to be set
It is placed in the interior involucrum, is located above or below the secondary neutron source material.
Compared with prior art, the utility model has the following beneficial effects: secondary neutron source provided by the utility model
The tritium that itself is generated can be deposited in stick by stick, and tritium discharge amount is effectively reduced, and reduce the tritium level in coolant, and it is dirty to mitigate environment
Dye.
Detailed description of the invention
Fig. 1 is one of the schematic diagram of secondary neutron source component structure in the prior art.
Fig. 2 is the two of the schematic diagram of secondary neutron source component structure in the prior art.
Fig. 3 is a kind of cross-sectional view of single layer secondary neutron source rod for reducing tritium discharge provided by the utility model.
Fig. 4 is a kind of cross-sectional view of secondary neutron source rod of bilayer for reducing tritium discharge provided by the utility model.
1- compacting part；2- resistance stopper；3- secondary neutron source rod；4- connection handle；The first end plug of 5-；6- cladding tubes；61-
Outer envelope；7- secondary neutron source material；The second end plug of 8-；9- third end plug；Involucrum in 10-；The 4th end plug of 11-；12- nickel plating is inhaled
Tritium material.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Secondary neutron source rod can be used individually in reactor, can also be loaded in secondary neutron source component and be used, such as Fig. 1
Shown in 2, secondary neutron source component by compacting part 1 or 4 underhung secondary neutron source rod 3 of connection handle and resistance stopper 2 or
Other associated component sticks composition.
The purpose of the utility model is to provide the secondary neutron source rods that one kind can reduce tritium discharge, by being promoted in secondary
The resistance tritium-permeation performance of component stick cladding tubes or in cladding tubes place inhale tritium material the tritium generated in stick is stayed in stick, from
And tritium discharge is reduced, specifically include three kinds of schemes: the coating resistance tritium coating on secondary neutron source rod cladding tubes；Using in zircaloy
Cladding tubes；Nickel plating is placed in cladding tubes inhales tritium material.
Specifically, the secondary neutron source rod that one kind provided by the utility model can reduce tritium discharge includes following implementation
Example.
1) the coating resistance tritium coating on secondary neutron source rod cladding tubes
Single layer involucrum secondary neutron source rod forms as shown in figure 3, coating secondary neutron source material 7 by cladding tubes 6, cladding tubes
6 both ends are sealed by the first end plug 5 and the second end plug 8.
The double-deck involucrum secondary neutron source rod is as shown in figure 4, coat secondary neutron source material 7 by interior involucrum 10, both ends pass through
Third end plug and the sealing of the 4th end plug 9 and 11, outside coat one layer of outer envelope 61 again, and 61 both ends of outer envelope pass through the first end plug 5
It is sealed with the second end plug 8.The material of outer envelope 61 and 10 and end plug 5,8,9,11 is stainless steel.
One layer of resistance tritium-permeation is coated in the utility model on the outer envelope 61 of secondary neutron source rod 3 or interior involucrum 10 to apply
Layer, to reduce the permeability of tritium.Resistance tritium coating material is Cr2O3、Al2O3、ZrO2, SiC or other materials with Tritium Resistivity.
Hinder inner surface or outer surface that tritium coating can be coated on cladding tubes 61 or interior involucrum 10.
2) using cladding tubes in zircaloy
For the utility model secondary neutron source rod as shown in figure 4, coating secondary neutron source material 7 by interior involucrum 10, both ends are logical
Third end plug 9 and the sealing of the 4th end plug 11 are crossed, interior 10 material of involucrum is zircaloy, and the material of end plug 9 and 11 is also zircaloy.It is external
One layer of outer envelope 61 is coated again, and 61 both ends of outer envelope are sealed by the first end plug 5 and the second end plug 8,5 He of outer envelope 61 and end plug
8 material is stainless steel.The outer diameter of involucrum 10 is 5~9mm in zircaloy, and wall thickness is 0.1~2mm.
3) nickel plating is placed in cladding tubes inhale tritium material
The utility model single layer involucrum secondary neutron source rod is as shown in figure 3, coat secondary neutron source material 7 by cladding tubes 6
Composition, 6 both ends of cladding tubes are sealed by the first end plug 5 and the second end plug 8, in cladding tubes 6, are placed nickel plating and are inhaled tritium material 12.
Tritium material 12 is inhaled in nickel plating can be placed in above or below secondary neutron source material 7.Nickel plating inhales the matrix of tritium material 12 for zirconium conjunction
Gold, plating nickel on surface, nickel plating layer thick are 5~20 μm.It is tubular or other shapes that tritium material 12 is inhaled in nickel plating.
The double-deck involucrum secondary neutron source rod is as shown in figure 4, coat secondary neutron source material 7 by interior involucrum 10, both ends pass through
End plug 9 and 11 seals, and outside coats one layer of outer envelope 61 again, and 61 both ends of outer envelope are close by the first end plug 5 and the second end plug 8
Envelope.Tritium material 12 is inhaled in nickel plating may be disposed between outer envelope 6 and interior involucrum 10, be located above or below interior involucrum.Tritium is inhaled in nickel plating
Material 12 may also set up in interior involucrum 10, be located above or below secondary neutron source material 7.
Compared with prior art, the utility model has the following beneficial effects: reduction tritium provided by the utility model discharges
Secondary neutron source rod the tritium that itself is generated can be deposited in stick, be effectively reduced tritium discharge amount, the tritium reduced in coolant contains
Amount mitigates environmental pollution.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, due to corresponding to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
Those skilled in the art can use different methods to achieve the described function each specific application, but
It is this realize it is not considered that beyond the scope of the utility model.
Obviously, it is practical new without departing from this can to carry out various modification and variations to utility model by those skilled in the art
The spirit and scope of type.If in this way, these modifications and variations of the present invention belong to the utility model claims and its
Within the scope of equivalent technologies, then the utility model is also intended to including these modification and variations.
Claims (10)
1. a kind of secondary neutron source rod for reducing tritium discharge, which is characterized in that applied on the cladding tubes of the secondary neutron source rod
It covers resistance tritium coating or places nickel plating in the cladding tubes of the secondary neutron source rod and inhale tritium material or in the secondary neutron source rod
It is interior to use zircaloy inner envelope pipe.
2. reducing the secondary neutron source rod of tritium discharge as described in claim 1, which is characterized in that the secondary neutron source rod is
Single layer involucrum secondary neutron source rod is made of cladding tubes cladding secondary neutron source material, and the both ends of the cladding tubes pass through
First end plug and the sealing of the second end plug, coat the resistance tritium coating on the cladding tubes.
3. reducing the secondary neutron source rod of tritium discharge as described in claim 1, which is characterized in that the secondary neutron source rod is
The double-deck involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends are logical
The first end plug and the sealing of the second end plug are crossed, the resistance tritium coating is coated on the interior involucrum.
4. reducing the secondary neutron source rod of tritium discharge as claimed in claim 3, which is characterized in that the resistance tritium coating material is
Cr2O3、Al2O3、ZrO2Or SiC.
5. reducing the secondary neutron source rod of tritium discharge as described in claim 1, which is characterized in that the secondary neutron source rod is
The double-deck involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends are logical
The first end plug and the sealing of the second end plug are crossed, the interior cladding materials is zircaloy, and the outsourcing shell material is stainless steel.
6. reducing the secondary neutron source rod of tritium discharge as described in claim 1, which is characterized in that the secondary neutron source rod is
Single layer involucrum secondary neutron source rod is made of cladding tubes cladding secondary neutron source material, and the both ends of the cladding tubes pass through
First end plug and the sealing of the second end plug place the nickel plating in the cladding tubes and inhale tritium material, and tritium material is inhaled in the nickel plating can
It is placed on above or below the secondary neutron source material.
7. reducing the secondary neutron source rod of tritium discharge as described in claim 1, which is characterized in that the secondary neutron source rod is
The double-deck involucrum secondary neutron source rod, the cladding tubes include interior involucrum and outer envelope, coat secondary neutron source by the interior involucrum
Material, both ends are sealed by third end plug and the 4th end plug, and outside coats one layer of outer envelope again, and the outer envelope both ends are logical
The first end plug and the sealing of the second end plug are crossed, the nickel plating is placed in the outer envelope or interior cladding tubes and inhales tritium material.
8. reducing the secondary neutron source rod of tritium discharge as claimed in claim 7, which is characterized in that tritium material is inhaled in the nickel plating can
It is set between the outer envelope and the interior involucrum, is located above or below the interior involucrum.
9. reducing the secondary neutron source rod of tritium discharge as claimed in claim 7, which is characterized in that tritium material is inhaled in the nickel plating can
It is set in the interior involucrum, is located above or below the secondary neutron source material.
10. reducing the secondary neutron source rod of tritium discharge as claimed in claim 7, which is characterized in that tritium material is inhaled in the nickel plating
Matrix be zircaloy, plating nickel on surface, nickel plating layer thick be 5~20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986566.6U CN209374067U (en) | 2018-11-29 | 2018-11-29 | A kind of secondary neutron source rod reducing tritium discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986566.6U CN209374067U (en) | 2018-11-29 | 2018-11-29 | A kind of secondary neutron source rod reducing tritium discharge |
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| Publication Number | Publication Date |
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| CN209374067U true CN209374067U (en) | 2019-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473190A (en) * | 2018-11-29 | 2019-03-15 | 上海核工程研究设计院有限公司 | A kind of secondary neutron source rod reducing tritium discharge |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473190A (en) * | 2018-11-29 | 2019-03-15 | 上海核工程研究设计院有限公司 | A kind of secondary neutron source rod reducing tritium discharge |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |