CN115083642B - High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system - Google Patents
High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system Download PDFInfo
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- CN115083642B CN115083642B CN202210756977.0A CN202210756977A CN115083642B CN 115083642 B CN115083642 B CN 115083642B CN 202210756977 A CN202210756977 A CN 202210756977A CN 115083642 B CN115083642 B CN 115083642B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
- G21C19/202—Arrangements for handling ball-form, i.e. pebble fuel
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/12—Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/34—Apparatus or processes for dismantling nuclear fuel, e.g. before reprocessing ; Apparatus or processes for dismantling strings of spent fuel elements
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The high-temperature gas cooled reactor fuel element conveying system provided by the embodiment of the invention comprises a fuel supply device, a discharge device, a lifting device and a distributing and choking device. The unloading device is arranged below the high-temperature gas cooled reactor and comprises a broken ball separating device, the broken ball separating device is connected with the lower end of the high-temperature gas cooled reactor, the lower end of the lifting device is connected with a first outlet of the broken ball separating device so as to lift the fuel element to a preset height, the highest lifting point of the lifting device is higher than the upper end of the high-temperature gas cooled reactor, and the lowest lifting point of the lifting device is lower than the lower end of the broken ball separating device. The upper end of the distribution flow blocking device is lower than the lifting highest point of the lifting device, the lower end of the distribution flow blocking device is higher than the upper end of the high-temperature gas cooled reactor, the distribution flow blocking device is connected with the upper end of the lifting device, and the third outlet of the distribution flow blocking device is connected with the upper end of the high-temperature gas cooled reactor. The invention has higher transportation efficiency and stability and higher flexibility.
Description
Technical Field
The invention belongs to the technical field of reactors, and particularly relates to a high-temperature gas cooled reactor fuel element conveying system and a high-temperature gas cooled reactor system.
Background
The high temperature gas cooled reactor adopts sphere-shaped gas cooled reactor technology, the fuel element adopts sphere-shaped geometric element, and the fuel element is subjected to a series of processes of singulation, ball breaking separation and burnup measurement after coming out of the reactor during normal operation, the fuel element which does not reach the burnup depth requirement is conveyed back to the reactor core again, the fission reaction continues to occur to release energy, and the fuel element which reaches the burnup depth requirement after multiple cycles is discharged from the system as spent fuel to be discharged to the spent fuel system, and the same number of new fuel elements are supplied to the reactor core after the spent fuel is discharged in order to maintain the sufficient residual reactivity of the reactor core, so as to maintain the normal power operation of the unit.
In the related art, the fuel element is discharged from the reactor by self weight to the lowest point in the system and then is reloaded into the reactor by means of air lifting. The new fuel element and the spent fuel element are also respectively fed into the reactor and the spent fuel system by means of air lifting.
However, pneumatic transportation has many drawbacks, such as that the pneumatic lifting method has severe limitation on the transportation speed of the spherical elements, can not be too fast or too slow, and can not simultaneously transport a plurality of fuel elements, thus limiting the efficiency of transporting the fuel elements and the flexibility of operation. Moreover, the length of the ball path conveying pipeline required by the pneumatic lifting mode is too long, the fuel element collides and rubs with the wall surface when moving in the pipeline for a long distance, dust and fragments are easy to generate, and the dust and fragments can influence the stability of the operation of equipment in the system, so that the system is stopped in an unplanned mode.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
To this end, embodiments of the present invention provide a high temperature gas cooled reactor fuel element delivery system.
The high-temperature gas cooled reactor fuel element conveying system comprises a fuel supply device, a discharging device, a lifting device and a distributing and choking device.
The fuel supply device is arranged above the high-temperature gas-cooled reactor and is connected with the upper end of the high-temperature gas-cooled reactor;
the unloading device is arranged below the high-temperature gas-cooled reactor and comprises a broken ball separating device, the broken ball separating device is provided with a first inlet, the first inlet is connected with the lower end of the high-temperature gas-cooled reactor, and the broken ball separating device is also provided with a first outlet and a second outlet;
the lower end of the lifting device is connected with the first outlet so as to lift the fuel element to a preset height, the highest lifting point of the lifting device is higher than the upper end of the high-temperature gas cooled reactor, and the lowest lifting point of the lifting device is lower than the lower end of the broken ball separating device;
the upper end of the distribution flow blocking device is lower than the lifting highest point of the lifting device, the lower end of the distribution flow blocking device is higher than the upper end of the high-temperature gas cooled reactor, the distribution flow blocking device is provided with a second inlet, the second inlet is connected with the upper end of the lifting device,
the distribution flow blocking device is further provided with a third outlet, and the third outlet is connected with the upper end of the high-temperature gas-cooled reactor.
In some embodiments, the high temperature gas cooled reactor fuel element conveying system of the embodiments of the present invention further includes a diverter and a shutdown temporary storage device, where the diverter is disposed between the lifting device and the distribution flow blocking device;
one end of the reverser is connected with the lifting device, and the other end of the reverser is switchable between a first state connected with the distribution flow blocking device and a second state connected with the shutdown temporary storage device;
the shutdown temporary storage device is provided with an auxiliary cooling device.
In some embodiments, the lifting device comprises a plurality of lifters, and the lifters are sequentially connected through a connecting pipe from bottom to top in the up-down direction.
In some embodiments, the connecting tube has first and second ends that are opposite in length, the first end being located above the second end, the first end being connected to an upper end of a lower one of the adjacent hoists, and the second end being connected to a lower end of an upper one of the adjacent hoists.
In some embodiments, the high temperature gas cooled reactor fuel element delivery system according to the embodiments of the present invention further includes a spent fuel temporary storage device, the spent fuel temporary storage device is disposed below the distribution choke device, the distribution choke device further has a fourth outlet, and an upper end of the spent fuel temporary storage device is connected to the fourth outlet.
In some embodiments, the discharge apparatus further comprises a scrap collection tank coupled to the second outlet of the crushed ball separation device.
In some embodiments, the ball breaker further has a fifth outlet connected to the chaff collection tank by a chaff pipe;
the discharging device further comprises an air passage purging device, an air port of the air passage purging device is connected with the crushed material pipe, a switching valve is arranged on the crushed material pipe, and the switching valve is arranged below the joint of the air port and the crushed material pipe.
In some embodiments, the gas circuit purge device is switchable between a suction state of suction and a blowing state of blowing.
In some embodiments, the fuel supply device is arranged above the high temperature gas cooled reactor, and the fuel supply device is provided with a fuel temporary storage device.
The embodiment of the invention also provides a high-temperature gas cooled reactor system, which comprises the high-temperature gas cooled reactor fuel element conveying system.
Drawings
FIG. 1 is a schematic diagram of a fuel element delivery system for a high temperature gas cooled reactor according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partial enlarged view at B in fig. 1.
Reference numerals:
1. a fuel supply device; 101. a fuel temporary storage device; 2. a discharging device; 201. broken ball separating device; 2011. a first inlet; 2012. a first outlet; 2013. a second outlet; 2014. a fifth outlet; 2015. a debris tube; 202. a scrap collection tank; 203. the gas path purging device; 2031. a vent; 204. a switch valve; 3. a lifting device; 301. a hoist; 302. a connecting pipe; 4. distributing a choke device; 401. a second inlet; 402. a third outlet; 403. a fourth outlet; 5. a commutator; 6. a shutdown temporary storage device; 7. temporary spent fuel storage device; 8. high temperature gas cooled reactor; 9. and a spent fuel connecting pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A high temperature gas cooled reactor fuel element delivery system in accordance with an embodiment of the present invention is described below with reference to fig. 1-3.
The high-temperature gas cooled reactor fuel element conveying system comprises a fuel supply device 1, a discharging device 2, a lifting device 3 and a distributing and choking device 4.
As shown in fig. 1, the fuel supply device 1 is provided above the high temperature gas cooled reactor 8 and connected to the upper end of the high temperature gas cooled reactor 8. The unloading device 2 is arranged below the high-temperature gas cooled reactor 8, the unloading device 2 comprises a broken ball separating device 201, the broken ball separating device 201 is provided with a first inlet 2011, the first inlet 2011 is connected with the lower end of the high-temperature gas cooled reactor 8, and the broken ball separating device 201 is further provided with a first outlet 2012 and a second outlet 2013.
The lower end of the lifting device 3 is connected with the first outlet 2012 to lift the fuel element to a preset height, the highest lifting point of the lifting device 3 is higher than the upper end of the high temperature gas cooled reactor 8, and the lowest lifting point of the lifting device 3 is lower than the lower end of the broken ball separating device 201.
The upper end of the distribution flow blocking device 4 is lower than the lifting highest point of the lifting device 3, the lower end of the distribution flow blocking device 4 is higher than the upper end of the high-temperature gas cooled reactor 8, and the distribution flow blocking device 4 is provided with a second inlet 401, and the second inlet 401 is connected with the upper end of the lifting device 3. The distribution flow blocking device 4 also has a third outlet 402, and the third outlet 402 is connected to the upper end of the high temperature gas cooled reactor 8.
According to the high-temperature gas cooled reactor fuel element conveying system, the fuel elements are discharged from the reactor through the discharging device 2, then lifted to the highest point through the lifting device 3, the fuel elements flow to the distributing and flow blocking device 4 by means of dead weight, the distributing and flow blocking device 4 shunts the fuel elements after performing fuel consumption measurement on the fuel elements, and the fuel elements which do not reach the fuel consumption depth flow into the reactor by means of the dead weight distribution of the fuel elements. Compared with the mode of pneumatic conveying in the related art, the pneumatic conveying device has higher conveying efficiency and stability, and simultaneously can simultaneously convey a plurality of fuel elements according to requirements, so that the pneumatic conveying device also has higher flexibility.
Therefore, the high-temperature gas cooled reactor fuel element conveying system provided by the embodiment of the invention has higher conveying efficiency and stability and higher flexibility.
A high temperature gas cooled reactor fuel element delivery system in accordance with an embodiment of the present invention is further described below with reference to fig. 1-3.
The high-temperature gas cooled reactor fuel element conveying system comprises a fuel supply device 1, a discharging device 2, a lifting device 3 and a distributing and choking device 4.
As shown in fig. 1, the fuel supply device 1 is provided above the high temperature gas cooled reactor 8 and connected to the upper end of the high temperature gas cooled reactor 8.
The unloading device 2 is arranged below the high-temperature gas cooled reactor 8, the unloading device 2 comprises a broken ball separating device 201, the broken ball separating device 201 is provided with a first inlet 2011, the first inlet 2011 is connected with the lower end of the high-temperature gas cooled reactor 8, and the broken ball separating device 201 is further provided with a first outlet 2012 and a second outlet 2013.
Alternatively, the unloading device 2 can be a horizontal shafting unloading mechanism, and can have the functions of single unloading and ball breaking separation. The outlet of the lower end of the high temperature gas cooled reactor 8 may be in communication with the first inlet 2011 of the pellet separator 201 through a core discharge pipe to discharge the fuel elements from the high temperature gas cooled reactor 8 into the discharge apparatus 2.
The ball breaking separation device 201 first performs singulation of the fuel elements and ball breaking separation of the fuel elements one by one.
The lower end of the lifting device 3 is connected with the first outlet 2012 to lift the fuel element to a preset height, the highest lifting point of the lifting device 3 is higher than the upper end of the high temperature gas cooled reactor 8, and the lowest lifting point of the lifting device 3 is lower than the lower end of the broken ball separating device 201.
The intact fuel elements are discharged to the lower end of the lifting device 3 through the first outlet 2012 after being separated by the ball breaking device 201. The lifting device 3 can adopt a waterwheel type lifting mode or a spiral lifting mode. It should be noted that other lifting modes can be selected according to actual needs.
The upper end of the distribution flow blocking device 4 is lower than the lifting highest point of the lifting device 3, the lower end of the distribution flow blocking device 4 is higher than the upper end of the high-temperature gas cooled reactor 8, and the distribution flow blocking device 4 is provided with a second inlet 401, and the second inlet 401 is connected with the upper end of the lifting device 3.
The fuel element lifted to the highest point by the lifting device 3 can flow into the distribution flow blocking device 4 by its own weight. The distribution flow blocking device 4 can utilize high-purity germanium to detect gamma rays emitted by the fuel element so as to carry out burnup measurement on the fuel element and determine whether the burnup depth of the fuel element meets the requirement. On the other hand, the distribution flow-blocking device 4 also integrates the function of a resistor.
Since the core temperature of the high temperature gas cooled reactor 8 is high, a natural circulation pressure head is formed, however, the natural circulation direction is opposite to the fuel element conveying direction, so as to eliminate the influence of the natural circulation on the operation of the fuel element conveying system, and further integrate a flow blocking function in the distribution flow blocking device 4 to prevent the high temperature gas in the core of the high temperature gas cooled reactor 8 from flowing upwards.
Further, the distribution choke 4 is provided with a third outlet 402, and the third outlet 402 is connected with the upper end of the high-temperature gas cooled reactor 8. So that fuel elements that do not meet the depth of burn requirement can flow through the third outlet 402 and by their own weight to the interior of the high temperature gas cooled reactor 8.
In some embodiments, the high temperature gas cooled reactor fuel element conveying system of the embodiment of the invention further comprises a commutator 5 and a shutdown temporary storage device 6, wherein the commutator 5 is arranged between the lifting device 3 and the distribution flow blocking device 4. One end of the commutator 5 is connected with the lifting device 3, and the other end of the commutator 5 is switchable between a first state connected with the distribution choke device 4 and a second state connected with the shutdown temporary storage device 6.
When the emergency shutdown condition of the high-temperature gas cooled reactor 8 unit occurs, the commutator 5 is switched to a second state, so that the fuel elements conveyed by the lifting device 3 enter the shutdown temporary storage device 6 for temporary storage, the fuel elements in the high-temperature gas cooled reactor 8 are rapidly discharged, and the effects of cold shutdown or maintenance shutdown are achieved.
Further, the shutdown temporary storage device 6 is provided with an auxiliary cooling device. Because the fuel elements temporarily stored in the shutdown buffer 6 are transported in the high temperature gas cooled reactor 8 under the emergency shutdown condition, the fuel elements in the shutdown buffer 6 are mostly fuel elements which do not reach the fuel consumption depth, and a certain amount of heat can be released in the shutdown buffer 6, so that the shutdown buffer 6 needs to be provided with an auxiliary cooling device to cool the shutdown buffer 6, and the problem of overheating of the shutdown buffer 6 is prevented.
In some embodiments, as shown in fig. 1, the lifting device 3 includes a plurality of lifts 301, and the plurality of lifts 301 are sequentially connected in the up-down direction by a connection pipe 302 from bottom to top.
Optionally, the lifting mode of the lifter 301 may be a waterwheel lifting mode, a spiral lifting mode, or a mode of matching the two modes, and the same or different lifting modes may be used, so that the continuous cyclic lifting of the fuel element can be realized by the lifting modes.
The high-temperature gas cooled reactor fuel element conveying system provided by the embodiment of the invention has the characteristics of simplicity, reliability and high lifting efficiency compared with a pneumatic conveying mode by arranging the plurality of lifters 301. During lifting, the fuel element is relatively stationary with respect to the hoisting machine 301 and substantially does not rub against and collide with elements in the lifting device 3 and thus does not generate a lot of dust and debris.
The plurality of lifters 301 are arranged simultaneously, so that the lifting pressure of a single lifter 301 can be reduced, the probability of mechanical failure can be further reduced, and meanwhile, the manufacturing difficulty of the lifters 301 can be reduced. It is noted that the number of lifts 301 can be determined according to actual needs.
Further, the outer surface of the hoist 301 is coated with a shielding layer for shielding radiation. Since part of the fuel elements in the elevator 301 also have a certain radiation for reaching the burn-up depth, it is necessary to cover the outer surface of the elevator 301 with a shielding layer for shielding the radiation, so as to prevent the workers in the field from being injured by the radiation.
In some embodiments, the connecting tube 302 has first and second ends that are opposite in length, the first end being located above the second end, the first end being connected to an upper end of a lower hoist 301 in an adjacent hoist 301, and the second end being connected to a lower end of an upper hoist 301 in an adjacent hoist 301.
By adopting the arrangement, the fuel element conveying system of the high-temperature gas cooled reactor can enter the lowest point of the upper lifting machine 301 through the connecting pipe 302 by utilizing the dead weight when the fuel element reaches the highest point of the lower lifting machine 301.
In some embodiments, the high temperature gas cooled reactor fuel element delivery system according to the embodiments of the present invention further includes a spent fuel temporary storage device 7, the spent fuel temporary storage device 7 is disposed below the distribution flow blocking device 4, the distribution flow blocking device 4 further has a fourth outlet 403, and an upper end of the spent fuel temporary storage device 7 is connected to the fourth outlet 403.
The fuel components with the required burnup depth measured by the distribution flow blocking device 4 enter the spent fuel temporary storage device 7 through the fourth outlet 403. Since the spent fuel temporary storage device 7 is arranged below the distribution flow blocking device 4, the spent fuel element can be self-rearranged to the spent fuel temporary storage device 7 without relying on air lifting.
In some embodiments, the discharge device 2 further comprises a scrap collecting tank 202, the scrap collecting tank 202 being connected to the second outlet 2013 of the scrap ball separating device 201.
The fuel elements discharged from the high-temperature gas cooled reactor 8 and entering the broken ball separating device 201 are subjected to single treatment by the broken ball separating device 201, the broken balls and the broken balls with smaller sizes are separated one by the broken ball separating device 201, the separated broken balls and the broken residues and the broken chips with smaller sizes are discharged into the broken ball collecting tank 202 through the second outlet 2013, and the broken balls and the broken residues and the broken chips with smaller sizes can flow into the broken ball collecting tank 202 by self weight without pneumatic conveying because the broken ball collecting tank 202 is positioned below the broken ball separating device 201.
Further, the ball breaker 201 further has a fifth outlet 2014, the fifth outlet 2014 is connected to the particle collection tank 202 through a dust pipe 2015, and the balls and smaller sized dust and dust separated by the ball breaker 201 can be discharged into the particle collection tank 202 through the dust pipe through the fifth outlet 2014, and it is noted that the balls and smaller sized dust and dust separated also flow into the particle collection tank 202 through the dust pipe by self weight through the fifth outlet 2014.
In some embodiments, the discharging device 2 further comprises an air channel purging device 203, the air vent 2031 of the air channel purging device 203 is connected with a crushed material pipe, the crushed material pipe is provided with a switch valve 204, and the switch valve 204 is arranged below the connection part of the air vent 2031 and the crushed material pipe. That is, when purging is required, the on-off valve 204 is closed to prevent gas from entering the chaff collection tank 202.
Optionally, the air path purge device 203 is switchable between a suction state of suction and a blowing state of blowing. The air path purging device 203 can adopt an air cannon pulse purging mode, and when the problem of bridging of fuel elements in the broken ball separating device 201 occurs, the fuel elements in the broken ball separating device 201 can be purged by pulse gas so as to achieve the purpose of bridge breaking. In addition, the air path purging device 203 can also realize the function of guiding out the chips and dust accumulated in the broken ball separating device 201, and the chips and dust in the broken ball separating device 201 are pumped out under the action of pressure difference by utilizing the air path purging device 203 to suck, thereby manufacturing a low-pressure environment in a downstream pipeline.
In some embodiments, the fuel supply device 1 is disposed above the high temperature gas cooled reactor 8, and the fuel supply device 1 has a fuel temporary storage device.
Alternatively, the fuel supply apparatus 1 may include a fuel temporary storage apparatus 101 for receiving a new fuel element supplied from a new fuel supply system and temporarily storing it in the fuel temporary storage apparatus 101. When it is desired to replenish the core with new fuel elements, the new fuel elements are sent into the high temperature gas cooled reactor 8.
Since the fuel temporary storage device 101 is arranged at a higher height than the reactor pressure vessel, new fuel elements can flow into the high-temperature gas cooled reactor 8 by self weight without pneumatic transportation.
Alternatively, the outlet of the fuel supply device 1 can be connected to the downstream pipeline of the distribution flow choker, and new fuel elements are conveyed into the high-temperature gas cooled reactor 8 by gravity instead of pneumatic conveying, so that the efficiency of conveying the new fuel elements can be greatly improved, and the charging time can be shortened.
The embodiment of the invention also provides a high-temperature gas cooled reactor system, which comprises the high-temperature gas cooled reactor fuel element conveying system. The high-temperature gas cooled reactor system comprises one or two high-temperature gas cooled reactor fuel element conveying systems. When the high temperature gas cooled reactor fuel element conveying system is shown in fig. 1, the upper end pipelines of the spent fuel temporary storage devices 7 of the two high temperature gas cooled reactor fuel element conveying systems can be connected through the spent fuel connecting pipe 9, and when the spent fuel temporary storage device 7 in one high temperature gas cooled reactor fuel element conveying system is full of spent fuel, the spent fuel temporary storage device 7 in the other high temperature gas cooled reactor fuel element conveying system can be conveyed to the spent fuel temporary storage device 9, so that the performance of the high temperature gas cooled reactor system for temporarily storing the spent fuel is greatly improved. Meanwhile, the high-temperature gas cooled reactor system comprising the high-temperature gas cooled reactor fuel element conveying system has higher transportation efficiency and stability and higher flexibility.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (6)
1. A high temperature gas cooled reactor fuel element delivery system, comprising:
the fuel supply device is arranged above the high-temperature gas-cooled reactor and is connected with the upper end of the high-temperature gas-cooled reactor;
the discharging device is arranged below the high-temperature gas-cooled reactor and comprises a crushed ball separating device and a crushed material collecting tank, the crushed ball separating device is provided with a first inlet, the first inlet is connected with the lower end of the high-temperature gas-cooled reactor, the crushed ball separating device is further provided with a first outlet and a second outlet, the crushed ball collecting tank is connected with the second outlet of the crushed ball separating device, the crushed ball separating device is further provided with a fifth outlet, the fifth outlet is connected with the crushed material collecting tank through a crushed material pipe, the discharging device further comprises an air channel purging device, an air channel purging device is connected with the crushed material pipe, and a switching valve is arranged on the crushed material pipe and is arranged below the joint of the air channel and the crushed material pipe;
the lower end of the lifting device is connected with the first outlet so as to lift the fuel element to a preset height, the highest lifting point of the lifting device is higher than the upper end of the high-temperature gas cooled reactor, and the lowest lifting point of the lifting device is lower than the lower end of the broken ball separating device;
the upper end of the distribution flow blocking device is lower than the lifting highest point of the lifting device, the lower end of the distribution flow blocking device is higher than the upper end of the high-temperature gas cooled reactor, the distribution flow blocking device is provided with a second inlet, the second inlet is connected with the upper end of the lifting device,
the distribution flow blocking device is also provided with a third outlet which is connected with the upper end of the high-temperature gas-cooled reactor;
the commutator and the shutdown temporary storage device are arranged between the lifting device and the distribution flow blocking device;
one end of the reverser is connected with the lifting device, and the other end of the reverser is switchable between a first state connected with the distribution flow blocking device and a second state connected with the shutdown temporary storage device;
the shutdown temporary storage device is provided with an auxiliary cooling device.
2. The high temperature gas cooled reactor fuel element delivery system of claim 1, wherein the lifting device comprises a plurality of lifts, the plurality of lifts being sequentially connected in the up-down direction by connecting pipes from bottom to top.
3. The high temperature gas cooled reactor fuel element delivery system of claim 1, wherein the connecting tube has first and second ends that are opposite in length, the first end being located above the second end, the first end being connected to an upper end of a lower one of the adjacent hoists, and the second end being connected to a lower end of an upper one of the adjacent hoists.
4. The high temperature gas cooled reactor fuel element delivery system of claim 1, further comprising a spent fuel temporary storage device disposed below the distribution flow blocking device, the distribution flow blocking device further having a fourth outlet, the upper end of the spent fuel temporary storage device being connected to the fourth outlet.
5. The high temperature gas cooled reactor fuel element delivery system of claim 1, wherein the gas path purge means is switchable between a suction state of suction and a blow state of blow.
6. The high temperature gas cooled reactor fuel element delivery system of claim 1, wherein the fuel supply device is disposed above the high temperature gas cooled reactor, the fuel supply device having a fuel temporary storage device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756977.0A CN115083642B (en) | 2022-06-30 | 2022-06-30 | High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system |
| PCT/CN2023/099665 WO2024001740A1 (en) | 2022-06-30 | 2023-06-12 | Fuel element delivery system for high-temperature gas-cooled reactor, and high-temperature gas-cooled reactor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756977.0A CN115083642B (en) | 2022-06-30 | 2022-06-30 | High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115083642A CN115083642A (en) | 2022-09-20 |
| CN115083642B true CN115083642B (en) | 2023-08-22 |
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| CN202210756977.0A Active CN115083642B (en) | 2022-06-30 | 2022-06-30 | High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115083642B (en) |
| WO (1) | WO2024001740A1 (en) |
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| CN115083642B (en) * | 2022-06-30 | 2023-08-22 | 华能核能技术研究院有限公司 | High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system |
| CN116344086B (en) * | 2023-03-29 | 2024-04-19 | 华能山东石岛湾核电有限公司 | Reactor core feeding pipe blocking on-line treatment system and method of fuel loading and unloading system |
| CN116189936B (en) * | 2023-03-30 | 2024-06-21 | 华能山东石岛湾核电有限公司 | Method for testing outside of flow choker of high-temperature gas cooled reactor fuel loading and unloading system |
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| CN115083642A (en) | 2022-09-20 |
| WO2024001740A1 (en) | 2024-01-04 |
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