CN204257217U - A kind of high flux sub-channel - Google Patents
A kind of high flux sub-channel Download PDFInfo
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- CN204257217U CN204257217U CN201420824463.5U CN201420824463U CN204257217U CN 204257217 U CN204257217 U CN 204257217U CN 201420824463 U CN201420824463 U CN 201420824463U CN 204257217 U CN204257217 U CN 204257217U
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- sub
- channel
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- down layer
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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
A kind of high flux sub-channel, under equal conditions can draw the neutron of more from sub-channel outlet, used sub-channel is changed into truncated conical shape by cylindrical by it, and around sub-channel, with the addition of tygon slowing down layer and graphite reflector.The neutron flux of sub-channel outlet is made to improve more than 80%; First add graphite and do reflection horizon, neutron flux is made to improve more than 50%, then sub-channel shape is changed into truncated conical shape by cylindrical, neutron flux is made to improve about 60%, tygon slowing down layer is added again between sub-channel and graphite reflector, the first slowing down of neutron is reflected again, finally makes neutron flux improve more than 80%; Therefore equal activity
252cf neutron source can draw the neutron of more from sub-channel outlet in the practical application such as neutron activation analysis, irradiation, not only improves neutron source economic benefit, and the running time simultaneously reduced a staff and neutron source are to the radiation of human body and environment.
Description
Technical field
The passage that the utility model relates to a kind of multiple material, sandwich construction improves neutron flux, for neutron activation analysis and neutron photography, belongs to Application of Nuclear Technology, specifically a kind of high flux sub-channel field.
Background technology
252cf neutron source is a kind of common neutron source in experiment, and belong to the neutron source of spontaneous fission, its power spectrum is comparatively close to pure fission energy spectrum.At present,
252the device of Cf neutron source in the practical applications such as neutron photography, neutron activation analysis, neutron moisture moisture, industrial flaw detection, agricultural breeding mostly is the xoncrete structure of cylindrical channel.Although such passage and structure can play shielding action to neutron, the neutron flux of its passage outlet is lower.Service efficiency for neutron utilization factor and neutron source is lower, makes the neutron irradiation time long.Therefore, the running time of staff will be relatively long.Neutron source so not only cannot be made to produce corresponding economic benefit, and simultaneously neutron source causes radiation hazard larger to human body and environment.This will be higher to the irradiation shielding requirements of device.The safe handling of neutron source will be unfavorable for like this, and the personal safety of operating personnel can not get best guarantee.
Summary of the invention
In order to equal activity can be made
252cf neutron source can produce the neutron of more in the practical application such as neutron activation analysis, irradiation, the running time reduced a staff, and the radiation hazard to human body and environment, the utility model provides a kind of high flux sub-channel, and technical matters to be solved improves the neutron flux of passage outlet.
The utility model solves the technical scheme that its technical matters adopts:
Design a kind of high flux sub-channel, comprise sub-channel, tygon slowing down layer, graphite reflector and concrete shielding.Used sub-channel is changed into truncated conical shape by cylindrical, and around sub-channel, with the addition of tygon slowing down layer and graphite reflector.
252cf neutron source is positioned at coordinate axis initial point, i.e. the sub-channel bottom surface center of circle, and sub-channel take y-axis as axis, inner vacuum; Graphite reflector is added with y-axis negative direction around sub-channel, because graphite has good reflectivity to neutron, so just can reflect the neutron run around sub-channel opposite direction and sub-channel in a large number, improve the neutron flux of sub-channel outlet, and neutron flux is improved
Sub-channel shape is set to truncated cone-shaped, sub-channel outlet, namely the diameter 8.5cm of truncated cone-shaped sub-channel upper bottom surface remains unchanged, truncated cone-shaped sub-channel bottom surface diameter is greater than upper bottom surface diameter, two lines on adjacent y-axis both sides are bus, the angle of bus and axis is 3-9 degree, the long 20cm of sub-channel, and inside is still vacuum.By such design, the reflection angle of neutron is changed, make more neutron reflection go out outlet, improve the neutron flux of sub-channel outlet further, neutron flux is improved
Between sub-channel and graphite reflector, add layer of polyethylene slowing down layer, tygon slowing down layer totally three part, slowing down layer three be one coaxial with sub-channel, with high, with the round platform shell of angle; The angle ranging from the angle of bus and y-axis, slowing down layer one be one with coaxial, the same bottom surface of sub-channel, round platform with angle; Slowing down layer two is right cylinders coaxial with sub-channel, its upper bottom surface and sub-channel bottom surface place are at grade, namely be positioned in y-axis negative direction, neutron source is made to be wrapped up by tygon like this, so it is each to neutron first through tygon slowing down that neutron source sends, reflected by graphite again, neutron flux is improved
Add concrete shielding in outermost, surround whole design, to reach the object of shielding protection, whole device is operated safer.
The beneficial effects of the utility model are:
The neutron flux of sub-channel outlet improved, so just can allow equal activity
252cf neutron source can produce the neutron of more in the practical application such as neutron activation analysis, irradiation, significantly improves the economic benefit of neutron source, and the utilization ratio of neutron and economic society effect, is better military and civilian service.The running time simultaneously reduced a staff, reduce the radiation of neutron source to human body and environment.For the safe handling of neutron source and the personal safety of operating personnel provide further guarantee.Sub-channel after optimization does not only affect original device to the slowing down of neutron and shielding, can also improve the neutron flux of sub-channel outlet, for the safe handling of neutron source and the personal safety of operating personnel provide further guarantee.
Accompanying drawing explanation
Further the utility model is described below in conjunction with drawings and Examples.
(in each figure, same section label is consistent)
Fig. 1 is entity schematic diagram of the present utility model.
Fig. 2 is cross-sectional view of the present utility model.
Fig. 3 is the sub-channel sectional view in the utility model.
Fig. 4 is tygon slowing down Rotating fields sectional view in the utility model.
Fig. 5 is graphite reflector section of structure in the utility model.
Fig. 6 is concrete shielding in the utility model.
In figure: 1. sub-channel, 2. slowing down layer one, 3. slowing down layer two, 4. slowing down layer three, 5. graphite reflector, 6. concrete shielding.
Embodiment
A kind of high flux sub-channel, as shown in figs 1 to 6, is made up of sub-channel, tygon slowing down layer, graphite reflector and concrete shielding.
Sub-channel: i.e. sub-channel outlet, be divided into upper bottom surface and bottom surface, sub-channel is set to truncated cone-shaped, the diameter of upper bottom surface is 8.5cm, and remaining constant, the diameter of bottom surface is greater than upper bottom surface diameter, the bus of sub-channel, the i.e. stringcourse of the right-angled trapezium of each position on side, the axis of sub-channel, the i.e. line of upper and lower two bottom center of sub-channel, the angle between the bus of sub-channel and axis is 3-9 degree, the long 20cm of sub-channel, and inside is vacuum; With the axis of sub-channel for y-axis, sub-channel outlet is y-axis positive dirction, and true origin is neutron source, that is the sub-channel bottom surface center of circle.
Tygon slowing down layer: be made up of three parts, slowing down layer one is a round platform being 1-2cm with coaxial, the same bottom surface of sub-channel, same to angle, height, the angle ranging from the angle of bus and y-axis; Slowing down layer two is, diameters coaxial with sub-channel is 15-30cm, the high right cylinder for 1-5cm, its upper bottom surface and sub-channel bottom surface are at grade, namely in y-axis negative direction, slowing down layer three be one with coaxial, the same height of sub-channel, same to angle, the thick round platform shell for 1-3cm, between sub-channel and graphite reflector, for slowing down fast neutron.
Graphite reflector: be one coaxial with sub-channel, diameter is 60-80cm, the high right cylinder for 46-55cm (removing the region shared by sub-channel, tygon slowing down layer), its upper bottom surface and sub-channel upper bottom surface are at grade, between tygon slowing down layer and concrete shielding, for reflecting the neutron propagated around y-axis negative sense and sub-channel.
Concrete shielding: be one coaxial with sub-channel, diameter is 200cm, the high right cylinder for 120cm (removing the region shared by sub-channel, tygon slowing down layer, graphite reflector), its upper bottom surface and sub-channel upper bottom surface are at grade, and seamless surround graphite reflector, and be positioned at graphite reflector outside, for shielding neutron.
In Fig. 1-Fig. 6,
252cf neutron source is Isotropic neutron source, and its neutron launched about has 50% to propagate along the negative sense of y-axis, after being reflected, has part neutron along the forward-propagating of y-axis by graphite reflector; Originally after the neutron and reflection of y-axis forward-propagating along the neutron of y-axis forward-propagating, only some can directly arrive sub-channel outlet, other neutron will by tygon slowing down layer slowing down, then reflected by graphite reflector, the repeatedly process of slowing down, reflection, final arrival sub-channel outlet, reaches the object improving sub-channel outlet neutron flux.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (5)
1. a high flux sub-channel, by sub-channel, tygon slowing down layer, graphite reflector, concrete shielding is formed, and it is characterized in that: used sub-channel is changed into truncated conical shape by cylindrical, and around sub-channel, with the addition of tygon slowing down layer and graphite reflector.
2. a kind of high flux sub-channel according to claim 1, it is characterized in that: described sub-channel, i.e. sub-channel outlet, be divided into upper bottom surface and bottom surface, sub-channel is set to truncated cone-shaped, the diameter of upper bottom surface is 8.5cm, and remain constant, the diameter of bottom surface is greater than upper bottom surface diameter, the bus of sub-channel, the i.e. stringcourse of the right-angled trapezium of each position on side, the axis of sub-channel, the i.e. line of upper and lower two bottom center of sub-channel, angle between the bus of sub-channel and axis is 3-9 degree, the long 20cm of sub-channel, and inside is vacuum, with the axis of sub-channel for y-axis, sub-channel outlet is y-axis positive dirction, and true origin is neutron source, that is the sub-channel bottom surface center of circle.
3. a kind of high flux sub-channel according to claim 1, it is characterized in that: described tygon slowing down layer, be made up of three parts, slowing down layer one is a round platform being 1-2cm with coaxial, the same bottom surface of sub-channel, same to angle, height, the angle ranging from the angle of bus and y-axis; Slowing down layer two is, diameters coaxial with sub-channel is 15-30cm, the high right cylinder for 1-5cm, its upper bottom surface and sub-channel bottom surface are at grade, namely in y-axis negative direction, slowing down layer three be one with coaxial, the same height of sub-channel, same to angle, the thick round platform shell for 1-3cm, between sub-channel and graphite reflector.
4. a kind of high flux sub-channel according to claim 1, it is characterized in that: described graphite reflector, be one coaxial with sub-channel, diameter is 60-80cm, height is the right cylinder of 46-55cm, its upper bottom surface and sub-channel upper bottom surface at grade, between tygon slowing down layer and concrete shielding.
5. a kind of high flux sub-channel according to claim 1, it is characterized in that: described concrete shielding, be one coaxial with sub-channel, diameter is 200cm, height is the right cylinder of 120cm, its upper bottom surface and sub-channel upper bottom surface at grade, and seamless surround graphite reflector, and are positioned at graphite reflector outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420824463.5U CN204257217U (en) | 2014-12-08 | 2014-12-08 | A kind of high flux sub-channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420824463.5U CN204257217U (en) | 2014-12-08 | 2014-12-08 | A kind of high flux sub-channel |
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| Publication Number | Publication Date |
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| CN204257217U true CN204257217U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420824463.5U Expired - Fee Related CN204257217U (en) | 2014-12-08 | 2014-12-08 | A kind of high flux sub-channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681106A (en) * | 2014-12-08 | 2015-06-03 | 西南科技大学 | High-flux neutron channel |
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2014
- 2014-12-08 CN CN201420824463.5U patent/CN204257217U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681106A (en) * | 2014-12-08 | 2015-06-03 | 西南科技大学 | High-flux neutron channel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20151208 |
|
| EXPY | Termination of patent right or utility model |