Dust leakage prevention type control rod, reactor control device, and horizontal reactor

Abstract

This invention discloses a dust leakage-proof control rod, a reactor control device, and a horizontal reactor, which can store absorber dust inside the control rod, preventing absorber dust from leaking to the outside of the control rod. The dust leakage-proof control rod includes a rod body and a drive mechanism connector. The rod body includes an outer shell and a bottom end; the bottom end is sealed at the bottom end of the outer shell. The drive mechanism connector is sealed at the top end of the outer shell, forming a core block receiving cavity together with the bottom end and the outer shell. One end of the drive mechanism connector located inside the core block receiving cavity forms a dust storage cavity, which communicates with the core block receiving cavity for settling and storing absorber dust within the core block receiving cavity; the drive mechanism connector also has a vent hole inside, through which the dust storage cavity communicates with the outside.

Description

Technical Field

[0001] This invention relates to the field of nuclear industry technology, and in particular to a dust leakage prevention control rod, a reactor control device, and a horizontal reactor. Background Technology

[0002] High-temperature gas-cooled reactors (HTGRs) are a type of nuclear reactor, often employing vertical or horizontal cores. Vertical cores are taller, which is not conducive to layout, while horizontal cores are shorter, making layout easier and also meeting the design requirements of mobile reactors.

[0003] Control rods are a crucial component for controlling reactor core reactivity, and their design must ensure passive inherent safety. For horizontally inserted control rods used in horizontal reactor cores, a design with internal and external openings to allow communication with the environment is often employed to avoid long-term stress on the cladding due to pressure differences between the inside and outside of the rods throughout its lifespan. However, because absorber core blocks are prone to pulverization or even fragmentation after absorbing neutrons during their lifespan, the resulting dust can leak into the core through the vents. The neutron absorption of this dust can affect the normal operation of the reactor core. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a dust leakage prevention control rod, a reactor control device and a horizontal reactor, which can store absorbent dust inside the control rod and prevent absorbent dust from leaking to the outside of the control rod.

[0005] In a first aspect, embodiments of the present invention provide a dust leakage prevention control rod for a horizontal reactor. The dust leakage prevention control rod includes a rod body and a drive mechanism connector. The rod body includes an outer shell and a bottom end; the bottom end is sealed at the bottom end of the outer shell. The drive mechanism connector is sealed at the top end of the outer shell, forming a core block receiving cavity together with the bottom end and the outer shell. One end of the drive mechanism connector located within the core block receiving cavity forms a dust storage cavity, which communicates with the core block receiving cavity for settling and storing absorbent dust within the core block receiving cavity; a vent is also provided inside the drive mechanism connector, through which the dust storage cavity communicates with the outside.

[0006] In some embodiments, the drive mechanism connector includes a connector body and a shroud assembly. The connector body is sealed at the top of the outer casing; the vent is formed on the connector body and extends through the end face of the connector body facing the bottom end. The shroud assembly is fastened to the end face of the connector body facing the bottom end and simultaneously fastened to the vent, so as to form the powder storage cavity together with the end face of the connector body.

[0007] In some embodiments, the powder storage chamber includes a first powder storage chamber. The shroud assembly includes a first shroud, which is fastened to the end face of the connector body facing the bottom end and simultaneously fastened to the vent hole, so as to form the first powder storage chamber together with the end face of the connector body; the first powder storage chamber communicates with the core block receiving cavity.

[0008] In some embodiments, a boss is formed on the end face of the connector body facing the bottom end, and the vent hole passes through the boss. The first shroud is fastened to the end face of the connector body facing the bottom end and simultaneously fastened to the boss. The end face of the connector body, the inner side of the first shroud, and the outer side of the boss form the first powder storage cavity. At least one first annular powder storage groove is formed on the outer side of the boss.

[0009] In some embodiments, a second annular powder storage trough is formed on the inner side of the first diaphragm at the position corresponding to the first annular powder storage trough.

[0010] In some embodiments, the first powder storage cavity is shaped like a trumpet with gradually decreasing size, pointing from the connector body to the bottom end.

[0011] In some embodiments, the powder storage cavity further includes a second powder storage cavity. The shroud assembly further includes a second shroud, which is fastened to the end face of the connector body facing the bottom end, and simultaneously fastened to the first shroud, so as to form the second powder storage cavity together with the end face of the connector body and the first shroud; the second powder storage cavity is in communication with the chip receiving cavity and the first powder storage cavity respectively.

[0012] In some embodiments, at least one third annular powder storage trough is formed on the outer surface of the first diaphragm.

[0013] In some embodiments, a fourth annular powder storage tank is formed on the inner side of the second diaphragm at the position corresponding to the third annular powder storage tank.

[0014] In some embodiments, the second powder storage cavity is shaped like a trumpet with gradually decreasing size, pointing from the connector body to the bottom end.

[0015] In some embodiments, a first gap exists between the edge of the first shroud and the end face of the connector body, and the first powder storage cavity communicates with the second powder storage cavity through the first gap. A second gap exists between the edge of the second shroud and the end face of the connector body, and the second powder storage cavity communicates with the core block receiving cavity through the second gap.

[0016] In some embodiments, the rod body further includes an absorber core block and an inner liner disposed within the core block receiving cavity; the number of absorber core blocks is multiple, and the multiple absorber core blocks are sequentially sleeved on the inner liner along the axial direction of the inner liner.

[0017] In some embodiments, the outer diameter of the inner liner decreases from large to small in the direction from the drive mechanism connector to the bottom end. All absorber cores have the same outer diameter, and the inner diameter of each absorber core matches the outer diameter of the inner liner at its location.

[0018] Therefore, the dust leakage prevention control rod provided in this embodiment of the invention, by setting an outer shell, a bottom end and a drive mechanism connector, so that the bottom end is sealed at the bottom end of the outer shell and the drive mechanism connector is sealed at the top end of the outer shell, can close both ends of the outer shell, so that the outer shell, the bottom end and the drive mechanism connector together form a core block receiving cavity that contains the absorber core block. By forming a dust storage chamber at one end of the drive mechanism connector located within the core housing cavity, and opening a vent hole inside the drive mechanism connector, the dust storage chamber can be connected to the core housing cavity. The dust storage chamber is connected to the outside through the vent hole, allowing the core housing cavity to communicate with the outside, thus balancing the air pressure between the core housing cavity and the outside of the dust leakage prevention control rod. Furthermore, the above arrangement allows the dust storage chamber to be positioned on the necessary path for absorber dust to leak from the core housing cavity to the outside, enabling the dust storage chamber to settle and store the absorber dust that is about to leak to the outside, thereby storing the absorber dust inside the dust leakage prevention control rod and preventing absorber dust from leaking to the outside of the dust leakage prevention control rod and affecting the normal operation of the reactor core.

[0019] Secondly, embodiments of the present invention also provide a reactor control device for a horizontal reactor. The reactor control device includes a dust leakage prevention control rod and a drive mechanism as described in the first aspect. The drive mechanism is connected to the drive mechanism connector of the dust leakage prevention control rod and is used to drive the dust leakage prevention control rod to move.

[0020] Thirdly, embodiments of the present invention also provide a horizontal reactor, which includes a reactor core and the reactor control device described in the second aspect.

[0021] The aforementioned reactor control device and horizontal reactor have the same beneficial technical effects as the dust leakage prevention control rods provided in some of the above embodiments, and will not be described in detail here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of this invention, the accompanying drawings used in some embodiments of this invention will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this invention, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this invention.

[0023] Figure 1 This is a structural diagram of a dust leakage prevention control rod provided in an embodiment of the present invention; Figure 2 A structural diagram of a rod provided in an embodiment of the present invention; Figure 3 A schematic diagram illustrating the dust settling position of an absorber according to an embodiment of the present invention; Figure 4 This is a structural diagram of a drive mechanism connector provided in an embodiment of the present invention; Figure 5 This is a structural diagram of an inner liner provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the installation of an absorber core block provided in an embodiment of the present invention.

[0024] Wherein, 1-drive mechanism connector; 2-rod body; 3-second powder storage chamber; 4-first powder storage chamber; 11-connector body; 12-first shroud; 13-second shroud; 21-outer shell; 22-bottom end; 23-absorber core block; 24-inner liner; 51-first dust deposition position; 52-second dust deposition position; 53-third dust deposition position; 54-fourth dust deposition position; 111-protrusion; 112-first annular powder storage tank; 121-second annular powder storage tank; 122-third annular powder storage tank; 131-fourth annular powder storage tank; 241-cylinder section; 242-partition. Detailed Implementation

[0025] The technical solutions in some embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided by the present invention are within the scope of protection of the present invention.

[0026] Where there is no conflict, the various embodiments of the present invention and the features thereof may be combined with each other.

[0027] In the description of this invention, it should be noted that the terms "above" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of the description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0029] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." Furthermore, the specific features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0033] Example 1: like Figure 1 As shown, this embodiment of the invention provides a dust leakage prevention control rod, which is applied in a horizontal reactor to control the reactor core.

[0034] like Figure 1 , Figure 2 and Figure 3As shown, the dust leakage prevention control rod includes a rod body 2 and a drive mechanism connector 1. The rod body 2 includes an outer shell 21 and a bottom end 22; the bottom end 22 is sealed at the bottom end of the outer shell 21. The drive mechanism connector 1 is sealed at the top end of the outer shell 21, forming a core block receiving cavity together with the bottom end 22 and the outer shell 21. One end of the drive mechanism connector 1 located inside the core block receiving cavity forms a dust storage cavity, which communicates with the core block receiving cavity and is used to settle and store the dust in the absorbent within the core block receiving cavity; the drive mechanism connector 1 also has a vent hole inside, through which the dust storage cavity communicates with the outside.

[0035] For example, the outer shell 21 is tubular in shape.

[0036] For example, the outer shell 21 and the bottom end 22, as well as the drive mechanism connector 1 and the outer shell 21, are connected by a sealing ring weld.

[0037] This allows the two ends of the outer shell 21 to be sealed, so that the outer shell 21, the bottom end 22, and the drive mechanism connector 1 together form a core block receiving cavity that contains the absorber core block 23.

[0038] For example, the rod body 2 also includes an absorber core 23 disposed within the core receiving cavity.

[0039] By connecting the dust storage chamber to the core assembly chamber, and having the dust storage chamber connected to the outside via vents, the core assembly chamber can be made accessible to the outside, thus balancing the air pressure between the core assembly chamber and the outside environment within the dust leak-proof control rod. Furthermore, this configuration places the dust storage chamber along the inevitable path of absorber dust leakage from the core assembly chamber to the outside, allowing the dust storage chamber to settle and store the absorber dust that is about to leak out. This keeps the absorber dust inside the dust leak-proof control rod, preventing it from leaking into the reactor core outside the control rod and affecting the normal operation of the reactor core.

[0040] Therefore, the dust leakage prevention control rod provided in this embodiment of the invention, by setting an outer shell 21, a bottom end 22 and a drive mechanism connector 1, so that the bottom end 22 is sealed at the bottom end of the outer shell 21 and the drive mechanism connector 1 is sealed at the top end of the outer shell 21, can close both ends of the outer shell 21, so that the outer shell 21, the bottom end 22 and the drive mechanism connector 1 together form a core block receiving cavity that contains the absorber core block 23. By forming a dust storage chamber at one end of the drive mechanism connector 1 located within the core assembly cavity, and opening a vent hole inside the drive mechanism connector 1, the dust storage chamber can be connected to the core assembly cavity. The dust storage chamber is connected to the outside through the vent hole, thereby allowing the core assembly cavity to communicate with the outside through the dust storage chamber, thus balancing the air pressure between the core assembly cavity and the outside of the dust leakage prevention control rod. Furthermore, the above arrangement allows the dust storage chamber to be positioned on the necessary path for absorber dust to leak from the core assembly cavity to the outside, enabling the dust storage chamber to settle and store the absorber dust that is about to leak to the outside, thereby storing the absorber dust inside the dust leakage prevention control rod and preventing absorber dust from leaking to the outside of the dust leakage prevention control rod and affecting the normal operation of the reactor core.

[0041] In some embodiments, combined with Figure 3 and Figure 4 The drive mechanism connector 1 includes a connector body 11 and a shroud assembly. The connector body 11 is sealed at the top of the outer casing 21; a vent is formed on the connector body 11 and extends through the end face of the connector body 11 facing the bottom end 22. The shroud assembly is fastened to the end face of the connector body 11 facing the bottom end 22 and simultaneously fastened to the vent, so as to form a powder storage cavity with the end face of the connector body 11.

[0042] For example, such as Figure 4 As shown, the connector body 11 is welded and sealed at the top of the outer shell 21 to seal the top of the outer shell 21. A vent is located at the center of the connector body 11. The diaphragm assembly can be spot-welded to the connector body 11 so that the powder storage chamber enclosed by the diaphragm assembly can communicate with the core block receiving chamber.

[0043] The above settings facilitate the formation of a powder storage cavity in the drive mechanism connector 1.

[0044] In some embodiments, combined with Figure 3 and Figure 4 The powder storage chamber includes a first powder storage chamber 4. The shroud assembly includes a first shroud 12, which is fastened to the end face of the connector body 11 facing the bottom end 22 and simultaneously fastened to the vent hole, so as to form the first powder storage chamber 4 together with the end face of the connector body 11; the first powder storage chamber 4 is in communication with the core block receiving cavity.

[0045] For example, the first shroud 12 is shaped like a vertically placed bowl. The first shroud 12 is fixedly connected to the connector body 11 by spot welding, so that there is a gap between the edge of the first shroud 12 and the connector body 11, so that the first powder storage chamber 4 can communicate with the core block receiving chamber through the gap. The absorbent dust in the core block receiving chamber can leak into the first powder storage chamber 4 and settle and be stored in the first powder storage chamber 4.

[0046] The above configuration allows the chip accommodating cavity to communicate with the outside through the first powder storage cavity 4 and the vent.

[0047] In some embodiments, combined with Figure 3 and Figure 4 A boss 111 is formed on the end face of the connector body 11 facing the bottom end 22, and a vent hole passes through the boss 111. A first diaphragm 12 is fastened to the end face of the connector body 11 facing the bottom end 22, and is also fastened to the boss 111. The end face of the connector body 11, the inner side of the first diaphragm 12, and the outer side of the boss 111 form a first powder storage cavity 4. At least one first annular powder storage groove 112 is formed on the outer side of the boss 111.

[0048] For example, the boss 111 is located at the center of the end face of the connector body 11. (Combined) Figure 3 When the dust leakage prevention control rod is placed horizontally, the outer side of the boss 111 extends in the horizontal direction, so that the depth direction of the first annular powder storage tank 112 on the outer side of the boss 111 is vertical, which makes it easier for the dust of the absorber to settle into the first annular powder storage tank 112 under its own gravity.

[0049] For example, the number of first annular powder storage tanks 112 can be one, two, or three, etc.

[0050] Combination Figure 3 and Figure 4 With the above settings, when the dust leakage prevention control rod is placed horizontally, the dust that leaks into the first dust storage chamber 4 can more easily settle into the first annular dust storage tank 112 under its own gravity and be stored.

[0051] In some embodiments, combined with Figure 3 and Figure 4 A second annular powder storage tank 121 is formed on the inner side of the first diaphragm 12 at the position corresponding to the first annular powder storage tank 112.

[0052] By adopting the above settings, the volume of the first powder storage chamber 4 at the position corresponding to the first annular powder storage tank 112 can be increased, and the gas flow velocity at this position can be reduced. Correspondingly, the movement speed of the absorbent dust in the gas is reduced, which makes it easier for the absorbent dust to settle at this position and be stored in the first annular powder storage tank 112 and the second annular powder storage tank 121.

[0053] In some embodiments, combined with Figure 1 and Figure 3 From the connector body 11 to the bottom end 22, the first powder storage chamber 4 is a trumpet shape with gradually decreasing size.

[0054] For example, the outer edge of the boss 111 is arc-shaped, and the inner side of the first partition 12 is an arc-shaped surface that matches the boss 111.

[0055] With the above configuration, when the absorbent dust in the first powder storage chamber 4 settles on the outer side of the boss 111 and the inner side of the first diaphragm 12, the absorbent dust can more easily slide down along the outer side of the boss 111 into the first annular powder storage tank 112 under the action of gravity, and slide down along the inner side of the first diaphragm 12 into the second annular powder storage tank 121.

[0056] In some embodiments, combined with Figure 3 and Figure 4 The powder storage chamber also includes a second powder storage chamber 3. The shroud assembly also includes a second shroud 13, which is fastened to the end face of the connector body 11 facing the bottom end 22, and is also fastened to the first shroud 12, so that the second powder storage chamber 3 is formed by the end face of the connector body 11 and the first shroud 12; the second powder storage chamber 3 is connected to the core block receiving cavity and the first powder storage chamber 4 respectively.

[0057] For example, the materials of the second shroud 13, the first shroud 12, and the connector body 11 can all be stainless steel.

[0058] For example, the second diaphragm 13 is shaped like a vertically placed bowl. The second diaphragm 13 is fixedly connected to the connector body 11 by spot welding, so that there is a gap between the edge of the second diaphragm 13 and the connector body 11, so that the second powder storage cavity 3 can communicate with the core block receiving cavity through the gap.

[0059] With the above configuration, the core block receiving cavity can be connected to the outside through the second powder storage cavity 3, the first powder storage cavity 4, and the vent hole. This allows the absorbent dust in the core block receiving cavity to settle and be stored in the second powder storage cavity 3 when it leaks into it, thereby improving the effect of settling and storing the absorbent dust.

[0060] In some embodiments, combined with Figure 3 and Figure 4At least one third annular powder storage tank 122 is formed on the outer surface of the first diaphragm 12.

[0061] For example, the number of third annular powder storage tanks 122 can be one, two, or three, etc.

[0062] Combination Figure 3 and Figure 4 With the above settings, when the dust leakage prevention control rod is placed horizontally, the dust entering the first dust storage chamber 4 can more easily settle and be stored in the first annular dust storage tank 112 under its own gravity.

[0063] In some embodiments, combined with Figure 3 and Figure 4 A fourth annular powder storage tank 131 is formed on the inner side of the second diaphragm 13 at the position corresponding to the third annular powder storage tank 122.

[0064] With the above settings, the volume of the second powder storage chamber 3 at the position corresponding to the third annular powder storage tank 122 can be increased, and the gas flow velocity at this position can be reduced. Correspondingly, the dust of the absorber can be more easily settled at this position and stored in the third annular powder storage tank 122 and the fourth annular powder storage tank 131.

[0065] Combination Figure 1 and Figure 3 The second powder storage chamber 3 is shaped like a trumpet with gradually decreasing size, pointing from the connector body 11 to the bottom end 22.

[0066] For example, the outer side of the first partition 12 is arc-shaped, and the inner side of the second partition 13 is an arc-shaped surface that matches the outer side of the first partition 12.

[0067] With the above configuration, when the absorbent dust in the second dust storage chamber 3 settles on the outer side of the first shroud 12 and the inner side of the second shroud 13, the absorbent dust can more easily slide down along the outer side of the first shroud 12 to the third annular dust storage tank 122 under the action of gravity, and slide down along the inner side of the second shroud 13 to the fourth annular dust storage tank 131.

[0068] In some embodiments, a first gap exists between the edge of the first diaphragm 12 and the end face of the connector body 11, and the first powder storage cavity 4 communicates with the second powder storage cavity 3 through the first gap. A second gap exists between the edge of the second diaphragm 13 and the end face of the connector body 11, and the second powder storage cavity 3 communicates with the core block receiving cavity through the second gap.

[0069] For example, the edge of the first diaphragm 12 is fixed to the end face of the connector body 11 by spot welding, and the edge of the second diaphragm 13 is also fixed to the end face of the connector body 11.

[0070] Through the inventor's actual verification, combined with Figure 3 and Figure 4 Dust generated from the absorber core 23 during its lifespan within the core housing cavity is first leaked through the second gap into the second dust storage chamber 3 between the second shroud 13 and the first shroud 12 due to factors such as vibration and tilting of the rod 2. The dust then settles at the first dust deposition position 51 in the third annular dust storage tank 122. Under the influence of gravity, the dust will also settle through the third annular dust storage tank 122 to the fourth dust deposition position 54 in the fourth annular dust storage tank 131 and be stored there, thus achieving the first layer of protection against the leakage of absorber dust to the external core. If rod 2 is disturbed again, the absorbent dust will leak from the second dust storage chamber 3 into the first dust storage chamber 4 between the first diaphragm 12 and the boss 111, and settle at the third dust deposition position 53 of the first annular dust storage tank 112. Under the influence of gravity, the absorbent dust will also settle through the first annular dust storage tank 112 to the second dust deposition position 52 of the second annular dust storage tank 121, thus achieving a second layer of protection against the leakage of absorbent dust to the external core and improving the settling and storage effect of absorbent dust.

[0071] In some embodiments, combined with Figure 1 and Figure 2 The rod body 2 also includes an absorber core block 23 and an inner liner 24 disposed in the core block accommodating cavity; there are multiple absorber core blocks 23, and multiple absorber core blocks 23 are sequentially sleeved on the inner liner 24 along the axial direction of the inner liner 24.

[0072] The inner liner 24 can prevent the absorber core block 23 from collapsing due to irradiation cracking during its service life and provides structural support for the absorber core block 23.

[0073] In some embodiments, such as Figure 5 and Figure 6 As shown, from the drive mechanism connector 1 to the bottom end 22, the outer diameter of the inner liner 24 decreases from large to small. The outer diameters of the absorber core blocks 23 are all the same, and the inner diameter of the absorber core block 23 is adapted to the outer diameter of the inner liner 24 at its location.

[0074] The inner liner 24 includes a cylindrical section 241 and a partition 242. The absorber core block 23 is assembled step by step when it is assembled onto the cylindrical section 241. After the cylindrical section 241 is fitted into the absorber core block 23 of that stage, the cylindrical sections 241 and the partition 242 of each stage are fixed by welding. After the cylindrical sections 241 and the partition 242 of each stage are assembled as a whole, they are filled into the middle space (core block receiving cavity) of the outer shell 21.

[0075] For example, the outer diameter of the partition 242 is the same as the outer diameter of the absorber core 23.

[0076] like Figure 6As shown, the inner diameter of the absorber core 23 gradually decreases as it moves away from the drive mechanism connector 1. This is to match the high total neutron dose on the side of the rod 2 near the bottom end 22, while also reducing the total weight of the dust leakage prevention control rod and the deflection of the dust leakage prevention control rod due to its own weight.

[0077] The inner diameter of the absorber core 23 is matched with the outer diameter of the inner liner 24 at its location, indicating that the inner diameter of the absorber core 23 is approximately equal to the outer diameter of the inner liner 24 at its location.

[0078] The outer diameter of each absorber core 23 is consistent, and a design gap is left between each absorber core 23 and the outer shell 21 to prevent the interaction force between the absorber core 23 and the shell 21 due to dimensional changes caused by irradiation swelling, thermal expansion and other factors during its service life.

[0079] The aforementioned partition 242 can axially divide the absorber core block 23, reducing the cumulative effect of the collapse tendency caused by the cracking of the absorber core block 23 in the axial direction. In addition, the partition 242 can isolate the absorber dust generated by the absorber core block 23 in different partitions, reducing the tendency of absorber dust to leak to the vent on the drive mechanism connector 1 side.

[0080] The above settings can improve the structural stability of the absorber core block 23 during its lifespan and reduce the total amount of absorber dust leaking into the vent on the drive mechanism connector 1 side.

[0081] Example 2: This invention also provides a reactor control device for a horizontal reactor. The reactor control device includes a dust leakage prevention control rod and a drive mechanism as described in Embodiment 1. The drive mechanism is connected to the drive mechanism connector 1 of the dust leakage prevention control rod and is used to drive the dust leakage prevention control rod to move.

[0082] For example, the drive mechanism includes a drive motor and a drive rod, the motor is connected to the drive rod, and the drive rod is connected to the drive mechanism connector 1.

[0083] The above settings can prevent dust from the absorber in the reactor control unit from leaking into the reactor core and affecting its normal operation.

[0084] Example 3: This invention also provides a horizontal reactor, which includes a reactor core and the reactor control device described in Embodiment 2.

[0085] The reactor control unit is located in the reactor core and is used to control the operation of the reactor core.

[0086] The above settings can prevent absorber dust from leaking into the reactor core outside the dust leak-proof control rods and affecting the normal operation of the reactor core, thereby improving the stability of the horizontal reactor during operation.

[0087] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dust leakage prevention control rod for a horizontal reactor, characterized in that, include: The rod body (2) includes an outer shell (21) and a bottom end (22); the bottom end (22) is sealed at the bottom end of the outer shell (21); and, The drive mechanism connector (1) is sealed at the top of the outer shell (21) to form a core block receiving cavity together with the bottom end (22) and the outer shell (21); The drive mechanism connector (1) has a powder storage chamber at one end located in the core block cavity. The powder storage chamber is connected to the core block cavity and is used to settle and store the absorbent dust in the core block cavity. The drive mechanism connector (1) also has a vent hole inside, and the powder storage chamber is connected to the outside through the vent hole.

2. The dust leakage prevention control rod according to claim 1, characterized in that, The drive mechanism connector (1) includes: The connector body (11) is sealed at the top of the outer casing (21); the vent is formed on the connector body (11) and extends through the end face of the connector body (11) facing the bottom end (22); and, The shroud assembly is fastened to the end face of the connector body (11) facing the bottom end (22) and simultaneously fastened to the vent hole, so as to form the powder storage cavity together with the end face of the connector body (11).

3. The dust leakage prevention control rod according to claim 2, characterized in that, The powder storage chamber includes a first powder storage chamber (4). The shroud assembly includes a first shroud (12), which is fastened to the end face of the connector body (11) facing the bottom end (22) and simultaneously fastened to the vent hole, so as to form the first powder storage cavity (4) together with the end face of the connector body (11); the first powder storage cavity (4) is in communication with the core block receiving cavity.

4. The dust leakage prevention control rod according to claim 3, characterized in that, A boss (111) is formed on the end face of the connector body (11) facing the bottom end (22), and the vent hole passes through the boss (111). The first diaphragm (12) is fastened to the end face of the connector body (11) facing the bottom end (22) and is also fastened to the boss (111). The end face of the connector body (11), the inner side of the first diaphragm (12) and the outer side of the boss (111) form the first powder storage cavity (4). At least one first annular powder storage groove (112) is formed on the outer side of the boss (111).

5. The dust leakage prevention control rod according to claim 4, characterized in that, A second annular powder storage trough (121) is formed on the inner side of the first diaphragm (12) at the position corresponding to the first annular powder storage trough (112).

6. The dust leakage prevention control rod according to claim 5, characterized in that, From the direction of the connector body (11) to the bottom end (22), the first powder storage cavity (4) is a trumpet shape with gradually decreasing size.

7. The dust leakage prevention control rod according to any one of claims 3-6, characterized in that, The powder storage chamber also includes a second powder storage chamber (3); The shroud assembly further includes a second shroud (13), which is fastened to the end face of the connector body (11) facing the bottom end (22) and simultaneously fastened to the first shroud (12), so as to form a second powder storage cavity (3) together with the end face of the connector body (11) and the first shroud (12); the second powder storage cavity (3) is connected to the core block receiving cavity and the first powder storage cavity (4) respectively.

8. The dust leakage prevention control rod according to claim 7, characterized in that, At least one third annular powder storage tank (122) is formed on the outer surface of the first diaphragm (12).

9. The dust leakage prevention control rod according to claim 8, characterized in that, A fourth annular powder storage tank (131) is formed on the inner side of the second diaphragm (13) at the position corresponding to the third annular powder storage tank (122).

10. The dust leakage prevention control rod according to claim 9, characterized in that, From the direction of the connector body (11) to the bottom end (22), the second powder storage cavity (3) is a trumpet shape with gradually decreasing size.

11. The dust leakage prevention control rod according to claim 7, characterized in that, There is a first gap between the edge of the first diaphragm (12) and the end face of the connector body (11), and the first powder storage chamber (4) communicates with the second powder storage chamber (3) through the first gap; There is a second gap between the edge of the second diaphragm (13) and the end face of the connector body (11), and the second powder storage cavity (3) is connected to the core block receiving cavity through the second gap.

12. The dust leakage prevention control rod according to claim 1, characterized in that, The rod (2) also includes an absorber core block (23) and an inner liner (24) disposed in the core block accommodating cavity; there are multiple absorber core blocks (23), and multiple absorber core blocks (23) are sequentially sleeved on the inner liner (24) along the axial direction of the inner liner (24).

13. The dust leakage prevention control rod according to claim 12, characterized in that, From the direction of the drive mechanism connector (1) pointing to the bottom end (22), the outer diameter of the inner liner (24) decreases from large to small; The outer diameters of the absorber core blocks (23) are all the same, and the inner diameter of the absorber core blocks (23) is adapted to the outer diameter of the inner liner (24) at the same location.

14. A reactor control device for a horizontal reactor, characterized in that, include: Dust leakage prevention control rod according to any one of claims 1-13; and, The drive mechanism is connected to the drive mechanism connector (1) of the dust leakage prevention control rod and is used to drive the dust leakage prevention control rod to move.

15. A horizontal reactor, characterized in that, include: Core; and, The reactor control apparatus of claim 14.

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