CN220020620U - Radioactive graphite dust collecting device for pebble-bed type high-temperature reactor - Google Patents
Radioactive graphite dust collecting device for pebble-bed type high-temperature reactor Download PDFInfo
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- CN220020620U CN220020620U CN202321656415.5U CN202321656415U CN220020620U CN 220020620 U CN220020620 U CN 220020620U CN 202321656415 U CN202321656415 U CN 202321656415U CN 220020620 U CN220020620 U CN 220020620U
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- dust
- gas
- exhaust pipe
- pipe
- cavity
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- 239000000428 dust Substances 0.000 title claims abstract description 181
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 27
- 239000010439 graphite Substances 0.000 title claims abstract description 27
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 24
- 238000000926 separation method Methods 0.000 claims abstract description 88
- 239000007787 solid Substances 0.000 claims abstract description 33
- 230000007423 decrease Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 20
- 230000005484 gravity Effects 0.000 abstract description 19
- 230000009471 action Effects 0.000 abstract description 11
- 239000012634 fragment Substances 0.000 abstract description 5
- 230000008021 deposition Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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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- Cyclones (AREA)
Abstract
The embodiment of the disclosure provides a radioactive graphite dust collection device for a ball bed type high-temperature reactor, impurity gas enters a cyclone separation cylinder from an air inlet pipe, the impurity gas descends along the inner wall of the cyclone separation cylinder in a spiral manner, under the action of centrifugal force and gravity, dust and fragments with larger mass fall into the inner side wall of a cone bucket of the cyclone separation cylinder, fall into a dust collection cavity by means of gravity, and a small amount of dust follows clean gas to enter a gas-solid separation cavity through a first exhaust pipe. After entering the gas-solid separation cavity, the gas passes through a diversion channel between the gas outlet of the first exhaust pipe and the diversion cover, the dust with larger mass flows to the dust discharge pipe through the diversion channel by virtue of inertia, and the gas with lighter mass enters the second exhaust pipe and enters the downstream pipeline. The device utilizes centrifugal force, gravity and inertia principle, and the secondary separation through cyclone separation barrel and gas-solid separation chamber is passed in succession, can realize the high-efficient separation of radioactive graphite dust.
Description
Technical Field
The embodiment of the disclosure belongs to the technical field of nuclear reactor engineering, and particularly relates to a radioactive graphite dust collecting device for a pebble-bed type high-temperature reactor.
Background
The fuel element of the pebble-bed high-temperature gas cooled reactor adopts a basic pebble element with graphite, and can realize the function of non-shutdown refueling by utilizing the favorable geometric characteristic of the pebble element. During core and off-stack circulation, the spherical fuel elements inevitably generate a portion of radioactive graphite dust and debris due to the friction and collision between the spherical fuel elements and between the spherical fuel elements and the steel components. As the reactor operates, these chips and dust gradually diffuse through the process piping to the associated system of the loop, making sealing of the process piping equipment, and particularly the valves, very difficult.
Because graphite dust generated by the fuel element has stronger radioactivity, the conventional filter is extremely complicated to replace the filter element, and the risk of internal irradiation is larger, so that the safety of maintenance personnel is not facilitated.
In view of the foregoing, it is desirable to provide a radioactive graphite dust collection device for a pebble-bed type thermopile.
Disclosure of Invention
Embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a radioactive graphite dust collection device for a pebble-bed type thermopile.
The embodiment of the disclosure provides a radioactive graphite dust collecting device for a pebble-bed type high-temperature reactor, which comprises a cyclone separation cylinder, a gas-solid separation cavity, a dust collecting cavity, an air inlet pipe, a first exhaust pipe, a second exhaust pipe, a guide cover and a dust discharge pipe;
the first end of the cyclone separation cylinder is connected with the gas-solid separation cavity, and the second end of the cyclone separation cylinder is connected with the dust collection cavity;
the air inlet pipe is tangentially connected with the cylinder section at the first end of the cyclone separation cylinder;
the air inlet of the first exhaust pipe is arranged in the cyclone separation cylinder, and the air outlet of the first exhaust pipe penetrates through the cyclone separation cylinder and stretches into the gas-solid separation cavity;
the guide cover is arranged at the upper part of the air outlet of the first exhaust pipe, so that a guide channel is formed between the guide cover and the air outlet of the first exhaust pipe;
the gas-solid separation chamber is provided with a dust discharge port, a first end of the dust discharge pipe is connected with the dust discharge port, and a second end of the dust discharge pipe is connected with the dust collection cavity;
the first end of the second exhaust pipe is connected with the gas-solid separation cavity, and the second end of the second exhaust pipe is connected with a downstream pipeline.
Optionally, the cross section dimension of the air outlet of the first exhaust pipe gradually decreases from the inlet to the direction of the air guide sleeve.
Optionally, the device further comprises an exhaust pipe filter element, and the exhaust pipe filter element is arranged in the second exhaust pipe.
Optionally, the exhaust pipe filter element adopts a flange filter element.
Optionally, the device further comprises a filter plate, and the filter plate is arranged at the air inlet of the first exhaust pipe.
Optionally, the device further comprises a dust baffle plate, wherein the dust baffle plate is arranged around the inner side wall of the cone section of the cyclone separation cylinder; wherein,
a gap is formed between the dust baffle and the inner side wall of the cone section of the cyclone separation cylinder.
Optionally, the apparatus further comprises a dust deflector;
the dust guide plate is obliquely arranged at the lower part of the guide channel, and the dust guide plate is connected with the dust discharge port, so that dust falling onto the dust guide plate is discharged into the dust discharge pipe through the dust discharge port.
Optionally, the device further comprises a shielding pipe, and the shielding pipe is sleeved outside the dust discharge pipe.
Optionally, the device further comprises a shielding box, and the shielding box is enclosed on the outer side of the dust collecting cavity.
Optionally, the device further comprises a level gauge, and the level gauge is inserted into the dust collecting cavity.
According to the radioactive graphite dust collecting device for the pebble-bed type high-temperature reactor, impurity gas enters the cyclone separation barrel from the air inlet pipe, the impurity gas descends along the inner wall of the cyclone separation barrel in a disc rotation mode, under the action of centrifugal force and gravity, dust and scraps with larger mass fall into the inner side wall of the cone hopper of the cyclone separation barrel, fall into the dust collecting cavity by means of gravity, and a small amount of dust enters the gas-solid separation cavity along with clean gas through the first exhaust pipe. After entering the gas-solid separation cavity, the gas passes through a diversion channel between the gas outlet of the first exhaust pipe and the diversion cover, the dust with larger mass flows to the dust discharge pipe through the diversion channel by virtue of inertia, and the gas with lighter mass enters the second exhaust pipe and enters the downstream pipeline. According to the radioactive graphite dust collecting device for the pebble-bed type high-temperature reactor, the centrifugal force, gravity and inertia principle are utilized, and the radioactive graphite dust can be efficiently separated by secondary separation through the cyclone separation barrel and the gas-solid separation cavity.
Drawings
Fig. 1 is a schematic structural view of a radioactive graphite dust collection device for a pebble-bed type thermopile according to an embodiment of the present disclosure.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are described in further detail below with reference to the accompanying drawings and detailed description.
As shown in fig. 1, the embodiment of the present disclosure provides a radioactive graphite dust collecting device for a pebble-bed type thermopile, which comprises a cyclone separation cylinder 1, a gas-solid separation chamber 2, a dust collecting chamber 3, an air inlet pipe 4, a first air outlet pipe 5, a second air outlet pipe 6, a guide cover 7 and a dust outlet pipe 8.
The first end of the cyclone separation cylinder 1 is connected with the gas-solid separation cavity 2, and the second end of the cyclone separation cylinder 1 is connected with the dust collection cavity 3. As shown in fig. 1, the cyclone separation barrel 1 comprises an upper cylinder and a lower cone structure. In the embodiment, the cyclone separation cylinder 1 is connected with the dust collection cavity 3 through a flange, so that the dust collection cavity 3 is convenient to transfer subsequently.
The air inlet pipe 4 is tangentially connected with the cylinder section of the first end of the cyclone separation barrel 1, when impurity gas containing graphite dust enters the cyclone separation barrel 1 from the air inlet pipe 4, the impurity gas descends along the inner wall of the cyclone separation barrel 1 in a spiral manner, and under the action of centrifugal force and gravity, dust and fragments with larger mass fall into the inner wall of the cone hopper of the cyclone separation barrel 1 and fall into the dust collecting cavity 3 by means of gravity.
The air inlet of the first exhaust pipe 5 is arranged in the cyclone separation barrel 1, and the air outlet of the first exhaust pipe 5 penetrates through the cyclone separation barrel 1 and stretches into the gas-solid separation cavity 2. A small amount of dust and gas can enter the gas-solid separation chamber 2 from the cyclone separation cylinder 1 through the first exhaust pipe 5.
The air guide cover 7 is covered on the upper part of the air outlet of the first exhaust pipe 5, so that an air guide channel 9 is formed between the air guide cover 7 and the air outlet of the first exhaust pipe 5. In this embodiment, the pod 7 is provided in an inverted cone structure. The pod 7 may be secured to the inner sidewall of the gas-solid separation chamber 2 by brackets (not shown).
As shown in fig. 1, the diversion channel 9 is divided into two areas, one is a dust deposition area 10 below the diversion channel 9, and the other is a clean gas area 11 above the diversion channel 9, that is, the clean gas area 11 is located between the diversion cover 7 and the inner side wall of the gas-solid separation cavity 2.
The gas-solid separation chamber 2 has a dust discharge port 12, a first end of the dust discharge pipe 8 is connected to the dust discharge port 12, and a second end of the dust discharge pipe 8 is connected to the dust collection chamber 3. Dust falling into the dust deposition area 10 is discharged into the dust discharge pipe 8 through the dust discharge port 12.
The first end of the second exhaust pipe 6 is connected with the gas-solid separation cavity 2, and the second end of the second exhaust pipe 6 is used for being connected with a downstream pipeline. The gas entering the clean gas zone 11 enters the second exhaust pipe 6 and finally enters the downstream piping.
According to the radioactive graphite dust collecting device for the pebble-bed type high-temperature reactor, impurity gas enters the cyclone separation barrel from the air inlet pipe, the impurity gas descends along the inner wall of the cyclone separation barrel in a disc rotation mode, under the action of centrifugal force and gravity, dust and scraps with larger mass fall into the inner side wall of the cone hopper of the cyclone separation barrel, fall into the dust collecting cavity by means of gravity, and a small amount of dust enters the gas-solid separation cavity along with clean gas through the first exhaust pipe. After entering the gas-solid separation cavity, the gas passes through a diversion channel between the gas outlet of the first exhaust pipe and the diversion cover, the dust with larger mass flows to the dust discharge pipe through the diversion channel by virtue of inertia, and the gas with lighter mass enters the second exhaust pipe and enters the downstream pipeline. According to the radioactive graphite dust collecting device for the pebble-bed type high-temperature reactor, the centrifugal force, gravity and inertia principle are utilized, and the radioactive graphite dust can be efficiently separated by secondary separation through the cyclone separation barrel and the gas-solid separation cavity.
Illustratively, as shown in fig. 1, the cross-sectional dimension of the air outlet of the first exhaust pipe 5 gradually decreases from the inlet thereof toward the pod 7. That is, the air outlet of the first exhaust pipe 5 is provided in a convergent nozzle structure.
In this embodiment, after the impurity gas enters the gas-solid separation chamber 2, the gas velocity is rapidly increased through the convergent nozzle structure of the first exhaust pipe 5, a diversion channel 9 is formed between the impurity gas and the diversion cover 7, the impurity gas flows to the side lower direction through the diversion channel 9, the dust with larger mass falls into the dust deposition area 10 by virtue of inertia, and the gas with lighter mass enters the clean gas area 11, so that the dust in the impurity gas is further separated.
Illustratively, as shown in fig. 1, the apparatus further includes an exhaust pipe filter element 13, and the exhaust pipe filter element 13 is disposed on the second exhaust pipe 6. That is, the second exhaust pipe 6 is mounted with the exhaust pipe filter element 13. Preferably, in the present embodiment, the exhaust pipe filter 13 is a flange filter, through which a very small amount of clean gas entering the second exhaust pipe 6 can be filtered.
The embodiment of the disclosure provides a radioactive graphite dust collection device for a pebble-bed type high-temperature reactor, has set up blast pipe filter core 13 on second exhaust pipe 6, and blast pipe filter core 13 adopts flange formula filter core, and is small, simple structure, and the on-the-spot change of being convenient for very much and radioactive dust handle, has solved the interior irradiation problem that radioactive graphite dust disperses in the big filter core structure of conventional filter change process.
Illustratively, as shown in fig. 1, the apparatus further comprises a filter plate 14, the filter plate 14 being disposed at the air inlet of the first exhaust pipe 5. The filter plate 14 is provided with a plurality of filter holes.
Specifically, when the impurity gas containing graphite dust enters the cyclone separation barrel 1 from the air inlet pipe 4, the impurity gas descends along the inner wall of the cyclone separation barrel 1 in a spiral manner, and under the action of centrifugal force and gravity, the dust and the fragments with larger mass fall into the inner side wall of the cone hopper of the cyclone separation barrel 1 and fall into the dust collecting cavity 3 by means of gravity. The dust with smaller mass enters the air inlet of the first exhaust pipe 5 along with the gas, a small amount of dust is filtered by the filter plate 14 before entering the air inlet of the first exhaust pipe 5, a part of dust with larger particles is filtered and falls into the dust collecting cavity 3 under the action of gravity, and a small amount of filtered small particle dust enters the gas-solid separation cavity 2 along with clean gas through the first exhaust pipe 5.
In the present embodiment, by providing the filter plate 14 at the air inlet of the first exhaust pipe 5, the impurity gas entering the first exhaust pipe 5 can be further filtered, and gas-solid separation can be achieved.
Illustratively, as shown in fig. 1, the device further comprises a dust plate 15, wherein the dust plate 15 is arranged around the inner side wall of the cone section of the cyclone separation barrel 1, and a gap is formed between the dust plate 15 and the inner side wall of the cone section of the cyclone separation barrel 1. The dust plate 15 may be secured to the inner side wall of the cone section of the cyclone cylinder 1 by a bracket (not shown). Wherein the air inlet of the first exhaust pipe 5 is located inside the dust plate 15.
Specifically, when the impurity gas containing graphite dust enters the cyclone separation cylinder 1 from the air inlet pipe 4, the impurity gas descends along the inner wall of the cyclone separation cylinder 1 in a spiral manner, and under the action of centrifugal force and gravity, the dust and the fragments with larger mass fall between the cyclone separation cylinder and the dust baffle 15, fall into the dust collection cavity 3 by virtue of gravity, and a small amount of dust with lighter mass enters the inner area of the dust baffle 15, passes through the filter plate 14 and enters the first exhaust pipe 5. The dust baffle 15 can prevent dust from entering the first exhaust pipe 5 after being disturbed, and improves the dust separation effect.
Illustratively, as shown in fig. 1, the apparatus further includes a dust deflector 16, the dust deflector 16 is disposed obliquely at a lower portion of the deflector channel 9, and the dust deflector 16 is connected to the dust discharge port 12 such that dust falling onto the dust deflector 16 is discharged into the dust discharge pipe 8 through the dust discharge port 12. As shown in fig. 1, the dust deflector 16 is inclined toward the dust discharge port 12, and the dust deflector 16 is connected to the dust discharge port 12.
In this embodiment, by providing the dust deflector 16, the dust falling into the dust deposition area 10 can be guided to the dust discharge port 12, and discharged into the dust discharge pipe 8 through the dust discharge port 12, so that the dust in the dust deposition area 10 can be well guided and discharged.
Illustratively, as shown in fig. 1, the device further comprises a shielding pipe 17, and the shielding pipe 17 is sleeved outside the dust discharge pipe 8.
In this embodiment, the shielding tube 17 is used to shield the radioactive dust in the dust discharge tube 8, so as to reduce the dosage rate of the surrounding sites, and facilitate the approach of the maintenance personnel.
As shown in fig. 1, a first flange 18 is provided at the inlet of the dust discharge pipe 8, and a second flange 19 is provided at the outlet of the dust discharge pipe 8. The dust discharge pipe 8 is connected with the gas-solid separation cavity 2 through the first flange 18, and the dust discharge pipe 8 is connected with the dust collection cavity 3 through the second flange 19, so that the on-site disassembly and assembly are convenient.
As shown in fig. 1, the dust discharge pipe 8 is serially provided with a first isolation valve 20, and the opening and closing of the first isolation valve 20 controls the opening and closing of the dust discharge pipe 8, so that the dust discharge pipe 8 can be conveniently controlled to be discharged into the dust collection cavity 3 through the first isolation valve 20.
Illustratively, as shown in fig. 1, the apparatus further comprises a shielding box 21, the shielding box 21 being arranged around the outside of the dust collection chamber 3.
In this embodiment, the shielding box 21 shields the radioactive dust inside the dust collection cavity 3, so as to reduce the dosage rate of the surrounding sites, and facilitate the approach of the maintenance personnel.
Illustratively, as shown in fig. 1, the device further comprises a level gauge 22, the level gauge 22 being inserted into the dust collection chamber 3. The level gauge 22 may be electrically connected to a remote terminal, and the level gauge 22 is used to detect the amount of dust in the dust collection chamber 3.
In this embodiment, by inserting the level gauge 22 into the dust collection chamber 3, the dust amount in the dust collection chamber 3 can be monitored remotely.
As shown in fig. 1, the second isolation valve 23 is provided at the upper portion of the shielding case 21, and the second isolation valve 23 can prevent the inside dust from overflowing during the transfer of the dust collection chamber 3.
As shown in fig. 1, the working principle of the radioactive graphite dust collection device for a pebble-bed type thermopile according to the embodiment of the present disclosure is as follows:
during normal operation, impurity gas containing graphite dust enters the cyclone separation barrel 1 from the air inlet pipe 4, the impurity gas descends along the inner wall disk rotation of the cyclone separation barrel 1, under the action of centrifugal force and gravity, dust and fragments with larger mass fall into the area between the cone hopper of the cyclone separation barrel 1 and the dust baffle 15, fall into the dust collection cavity 3 by virtue of gravity, a small amount of dust enters the inner area of the dust baffle 15, is isolated by the filter plate 14, falls into the dust collection cavity 3 under the action of gravity, and a small amount of dust follows clean gas to enter the gas-solid separation cavity 2 through the first exhaust pipe 5. After entering the gas-solid separation cavity 2, the gas rapidly increases in speed through the action of the convergent nozzle at the gas outlet of the first exhaust pipe 5, flows to the side lower part through the flow guide channel 9, and the dust with larger mass falls into the dust guide plate 16 by virtue of inertia, and flows to the dust discharge pipe 8 through the action of the dust guide plate 16. The lighter gas then enters the clean gas zone 11 and then enters the second exhaust pipe 6 where a very small amount of impurities can be filtered through the exhaust pipe filter element 13 and finally enter the downstream pipeline.
It is to be understood that the above implementations are merely exemplary implementations employed to illustrate the principles of the disclosed embodiments, which are not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the embodiments of the disclosure, and these modifications and improvements are also considered to be within the scope of the embodiments of the disclosure.
Claims (10)
1. The radioactive graphite dust collecting device for the pebble-bed type high-temperature reactor is characterized by comprising a cyclone separation cylinder, a gas-solid separation cavity, a dust collecting cavity, an air inlet pipe, a first exhaust pipe, a second exhaust pipe, a guide cover and a dust discharge pipe;
the first end of the cyclone separation cylinder is connected with the gas-solid separation cavity, and the second end of the cyclone separation cylinder is connected with the dust collection cavity;
the air inlet pipe is tangentially connected with the cylinder section at the first end of the cyclone separation cylinder;
the air inlet of the first exhaust pipe is arranged in the cyclone separation cylinder, and the air outlet of the first exhaust pipe penetrates through the cyclone separation cylinder and stretches into the gas-solid separation cavity;
the guide cover is arranged at the upper part of the air outlet of the first exhaust pipe, so that a guide channel is formed between the guide cover and the air outlet of the first exhaust pipe;
the gas-solid separation chamber is provided with a dust discharge port, a first end of the dust discharge pipe is connected with the dust discharge port, and a second end of the dust discharge pipe is connected with the dust collection cavity;
the first end of the second exhaust pipe is connected with the gas-solid separation cavity, and the second end of the second exhaust pipe is connected with a downstream pipeline.
2. The apparatus of claim 1, wherein the cross-sectional dimension of the air outlet of the first exhaust duct decreases from the inlet thereof toward the pod.
3. The apparatus of claim 1, further comprising an exhaust pipe filter element disposed in the second exhaust pipe.
4. A device according to claim 3, wherein the exhaust pipe filter element is a flange filter element.
5. The apparatus of any one of claims 1 to 4, further comprising a filter plate disposed at an air inlet of the first exhaust pipe.
6. The apparatus of any one of claims 1 to 4, further comprising a dust plate surrounding an inner sidewall of the cyclone cone section; wherein,
a gap is formed between the dust baffle and the inner side wall of the cone section of the cyclone separation cylinder.
7. The apparatus of any one of claims 1 to 4, further comprising a dust deflector;
the dust guide plate is obliquely arranged at the lower part of the guide channel, and the dust guide plate is connected with the dust discharge port, so that dust falling onto the dust guide plate is discharged into the dust discharge pipe through the dust discharge port.
8. The apparatus of any one of claims 1 to 4, further comprising a shield tube, the shield tube being sleeved outside the dust discharge tube.
9. The apparatus of any one of claims 1 to 4, further comprising a shielding box surrounding the dust collection chamber.
10. The apparatus of any one of claims 1 to 4, further comprising a level gauge interposed in the dust collection chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321656415.5U CN220020620U (en) | 2023-06-28 | 2023-06-28 | Radioactive graphite dust collecting device for pebble-bed type high-temperature reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321656415.5U CN220020620U (en) | 2023-06-28 | 2023-06-28 | Radioactive graphite dust collecting device for pebble-bed type high-temperature reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220020620U true CN220020620U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321656415.5U Active CN220020620U (en) | 2023-06-28 | 2023-06-28 | Radioactive graphite dust collecting device for pebble-bed type high-temperature reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220020620U (en) |
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2023
- 2023-06-28 CN CN202321656415.5U patent/CN220020620U/en active Active
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