Crushing jar for pebble bed high temperature reactor

Abstract

The present invention relates to the technical field of reactor supporting equipment, and provides a ball crushing tank for a pebble bed high temperature reactor, comprising a storage container, a ball storage pipe, a first flange cover and an outer shielding member; a sealed accommodating chamber is formed in the storage container, and a side feed hole, a top feed hole and an air inlet hole connected to the accommodating chamber are formed on the top of the storage container; the ball storage pipe is connected to the side feed hole, and the end of the ball storage pipe away from the side feed hole is used to connect to the system pipeline; the first flange cover is detachably connected to the air inlet hole; and the outer shielding member is arranged on the outside of the storage container. The ball storage pipe is used to receive the broken balls, debris and dust generated during the normal operation of the system pipeline. When the storage container is fully loaded, the top feed hole is opened, and the broken balls, debris and dust are sucked and transported to an external transfer container through a special tooling. During the suction process, the first flange cover is opened to let air in from the air inlet hole, which is conducive to the smooth suction of materials.

Description

Technical Field

[0001] The invention relates to the technical field of reactor supporting equipment, in particular to a ball crushing tank used for a pebble bed high temperature reactor. Background Art

[0002] The pebble bed high temperature reactor is a fourth generation advanced reactor with inherent safety features. It can achieve continuous operation without stopping the reactor through its fully automatic fuel loading and unloading system. Since the fuel elements of the high temperature reactor are spherical elements based on graphite, the flow of a large number of spherical elements in the reactor is random, and the transportation in the fuel loading and unloading system is discrete. During the flow of spherical elements in the reactor and the transportation in the pipelines of the fuel loading and unloading system, friction and collision between graphite balls, between graphite balls and components in the reactor, and with steel equipment and pipelines will inevitably cause dust, as well as small probability damage, resulting in broken balls and debris. In the fuel loading and unloading system, after the spherical elements are unloaded from the core in a singular manner, the process that usually follows is the sorting of broken balls. The sorted broken balls, debris, and dust accumulated in the reactor will be temporarily stored in the broken ball tank after the broken balls are separated. In the related art, the fuel loading and unloading system of the pebble bed high temperature reactor is continuously operated online without stopping the reactor. The ball crushing tank is usually designed to have the ball storage capacity for the entire life cycle of the reactor. Its capacity is estimated based on the experience of ball production during the operation of the pebble bed reactor. However, the amount of debris and dust from the reactor will also occupy the volume of the ball crushing tank. The unexpected amount of debris, dust and the actual amount of ball crushing produced may cause the ball crushing tank to be fully loaded in the middle of the reactor life cycle. For this reason, it is necessary to provide a transfer interface when it is fully loaded. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a ball crushing tank for a high-temperature pebble bed reactor, wherein the ball pipe is used to receive the broken balls, debris and dust generated during the normal operation of the system pipeline. When the storage container is fully loaded, the top feed hole is opened, and the broken balls, debris and dust are sucked and transported to an external transfer container through a special tool. During the suction process, the first flange cover is opened to allow air to enter from the air inlet hole, which is beneficial to prolonging the service life of the ball crushing tank.

[0004] A ball crushing tank for a pebble bed high temperature reactor according to an embodiment of the present invention comprises:

[0005] A storage container is formed with a sealed accommodating cavity, and a side feed hole, a top feed hole and an air inlet hole connected to the accommodating cavity are formed on the top of the storage container;

[0006] A ball pipe is connected to the side feed hole, and an end of the ball pipe facing away from the side feed hole is used to be connected to a system pipeline;

[0007] a first flange cover, detachably connected to the air inlet;

[0008] The outer shielding member is arranged on the outer side of the storage container.

[0009] According to one embodiment of the present invention, the storage container comprises:

[0010] The barrel section is a hollow structure with openings at both ends;

[0011] a top shielding member, sealingly connected to the opening at one end of the barrel section;

[0012] The bottom shielding component is sealed and connected to the opening at the other end of the barrel section. The accommodating cavity is formed among the top shielding component, the barrel section and the bottom shielding component.

[0013] According to one embodiment of the present invention, the outer shielding member comprises:

[0014] A cylindrical outer shell is sleeved on the outer side of the storage container, and an annular cavity is formed in the outer shell;

[0015] A high-density metal filler is arranged in the annular cavity, and the high-density metal filler is used to shield the lateral radiation in the storage container.

[0016] According to one embodiment of the present invention, the cylindrical outer shell comprises:

[0017] An inner cylinder, sleeved on the outer side of the storage container;

[0018] The outer cylinder is sleeved on the outer side of the inner cylinder and is coaxially arranged with the inner cylinder;

[0019] An annular bottom plate connected to the bottom of the inner tube and the outer tube;

[0020] An annular top plate is connected to the tops of the inner cylinder and the outer cylinder, and the annular cavity is formed among the inner cylinder, the outer cylinder, the annular bottom plate and the annular top plate.

[0021] According to one embodiment of the present invention, it also includes:

[0022] A chassis, disposed at the bottom of the storage container and the outer shielding member, and connected to the outer shielding member;

[0023] And / or, a pressure cover is arranged on the top of the storage container and the outer shielding member and connected to the outer shielding member, and the pressure cover is used to fix the storage container.

[0024] According to one embodiment of the present invention, it also includes:

[0025] A feed inlet assembly is detachably connected to the top feed hole, and the feed inlet assembly is used to receive waste materials when the system fails.

[0026] According to one embodiment of the present invention, the feed port assembly comprises:

[0027] A hole plug connected to the top feed hole;

[0028] An inclined through component is connected to the hole plug, and a feed channel is formed in the inclined through component and the hole plug, and a feed end of the feed channel avoids the axis of the top feed hole.

[0029] According to one embodiment of the present invention, the inclined through assembly includes a shielding column, and the shielding column corresponds to the axis of the top feed hole.

[0030] According to one embodiment of the present invention, a detection hole is further formed on the top of the storage container, and the detection hole is used to connect to a detection hole plug or a material level detection component;

[0031] Under normal operating conditions, the detection hole is connected to the detection hole plug;

[0032] In the material level detection working condition, the detection hole is connected to the material level detection component.

[0033] According to one embodiment of the present invention, under the material level detection working condition, a shielding sleeve is provided on the top of the storage container at a position corresponding to the detection hole, and the shielding sleeve is connected to the storage container or the material level detection component.

[0034] According to one embodiment of the present invention, the angle between the axis of the goal tube and the horizontal plane is greater than 35°.

[0035] The above one or more technical solutions in the present invention have at least one of the following technical effects:

[0036] The ball crushing tank for a high-temperature pile of a ball bed provided according to an embodiment of the present invention comprises a storage container, a ball injection pipe, a first flange cover and an outer shielding member; a sealed accommodating chamber is formed in the storage container, and a side feed hole, a top feed hole and an air inlet hole connected to the accommodating chamber are formed on the top of the storage container; the ball injection pipe is connected to the side feed hole, and the end of the ball injection pipe away from the side feed hole is used to connect to the system pipeline; the first flange cover is detachably connected to the air inlet hole; and the outer shielding member is arranged on the outside of the storage container. The ball injection pipe is used to receive the broken balls, debris and dust generated during the normal operation of the system pipeline. When the storage container is fully loaded, the top feed hole is opened, and the broken balls, debris and dust are sucked and transported to the external transfer container through a special tooling. During the suction process, the first flange cover is opened to let air in from the air inlet hole, which is conducive to the smooth suction of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic cross-sectional view of a ball crushing tank for a pebble bed high temperature reactor provided by an embodiment of the present invention Figure 1 ;

[0039] Figure 2 A three-dimensional schematic diagram of a top shielding component of a storage container of a crushed ball tank for a pebble bed high temperature reactor provided by an embodiment of the present invention;

[0040] Figure 3 A partial three-dimensional schematic diagram of a ball crushing tank for a pebble bed high temperature reactor provided by an embodiment of the present invention;

[0041] Figure 4 A schematic cross-sectional view of a ball crushing tank for a pebble bed high temperature reactor provided by an embodiment of the present invention Figure 2 ;

[0042] Figure 5 A schematic perspective view of an annular bottom plate provided by an embodiment of the present invention at one angle;

[0043] Figure 6 A schematic diagram of a shielding reinforcement plate provided in an embodiment of the present invention;

[0044] Figure 7 A schematic three-dimensional diagram of a gland provided in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1. Storage container; 2. External shielding component; 3. Chassis; 4. Gland; 5. Feed inlet assembly; 6. Material level detection assembly; 7. Inlet tube; 8. Shielding reinforcement plate; 9. Shielding sleeve; 10. Matching flange; 11. Bottom shielding component; 12. Cylinder section; 13. Top shielding component; 14. Boss; 15. Side feed hole; 16. Top feed hole; 17. Detection hole; 18. Air inlet; 19a. First lifting ear; 19b. Second lifting ear; 20. Top surface; 21. Slope surface; 22. Flat cut surface; 23. Stopper; 24. Annular bottom plate; 25. Inner cylinder; 26. Outer cylinder; 27. High density 1. metal filling piece; 28. annular top plate; 29. ​​hole plug; 30. inclined through assembly; 31. shielding column; 32. feed port; 33. feed elbow; 34. feed pipe; 35. flange; 36. second flange cover; 37. first flange cover; 38. feed cavity; 39. shielding chamber; 40. motor support; 41. magnetic transmission device; 42. stirring head; 43. countersunk hole; 44. outer plane; 45. first group of bolt holes; 46. lifting hole; 47. oblique cut; 48. oblique section; 49. second group of bolt holes; 50. annular surface; 51. longitudinal section; 52. third group of bolt holes. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the invention clearer, the technical solution in the invention will be clearly described below in conjunction with the drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0050] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] In the related art, the fuel loading and unloading system of the pebble bed high temperature reactor is continuously operated online without stopping the reactor. The ball crushing tank is usually designed to have the ball storage capacity for the entire life cycle of the reactor. Its capacity is estimated based on the experience of ball production during the operation of the pebble bed reactor. However, the amount of debris and dust from the reactor will also occupy the volume of the ball crushing tank. The unexpected amount of debris, dust and the actual amount of ball crushing produced may cause the ball crushing tank to be fully loaded in the middle of the reactor life cycle. For this reason, it is necessary to provide a transfer interface when it is fully loaded.

[0053] According to the embodiment of the present invention, the ball crushing tank for the pebble bed high temperature reactor is provided. Figures 1 to 7 , including a storage container 1, a goal tube 7, a first flange cover 37 and an outer shielding member 2.

[0054] A sealed accommodating cavity is formed in the storage container 1, and the accommodating cavity is used to place broken balls, debris and dust, etc. A side feed hole 15, a top feed hole 16 and an air inlet hole 18 connected to the accommodating cavity are formed on the top of the storage container 1.

[0055] The goal tube 7 is coaxially connected to the side feed hole 15 of the storage container 1 and has the same diameter as the side feed hole 15. The end of the goal tube 7 away from the side feed hole 15 is the feed end. The goal tube 7 is directly or through a matching flange 10 connected to the system pipeline. During the normal operation of the fuel loading and unloading system, the goal tube 7 and the side feed hole 15 serve together as a channel for online material transportation. The angle between the axis of the goal tube 7 and the horizontal plane is greater than 35°, so that the broken balls, debris and dust can flow into the accommodating cavity of the storage container 1 by their own weight for storage.

[0056] The top feed hole 16 is connected online to another pipeline for collecting broken balls, debris and dust from another pipeline online. Under different usage conditions, a shielding hole plug can also be configured for the top feed hole 16.

[0057] The first flange cover 37 is detachably connected to the air inlet hole 18 , and can put the air inlet hole 18 in a conducting state or a blocked state.

[0058] The air inlet 18 is used to transfer the waste in the storage container 1. When the fuel loading and unloading system operates normally, the air inlet 18 is sealed by the first flange cover 37. When the storage container 1 is fully loaded and waste needs to be transferred, the shielding hole plug of the top feed hole 16 is opened, and the broken balls, debris and dust are sucked and transported to the external transfer container through a special tool. During the suction process, the first flange cover 37 needs to be opened to let air in from the air inlet 18 to facilitate the smooth suction of the material. During the life of the reactor, the waste in the storage container 1 can be pumped out through the top feed hole 16 and the air inlet 18, thereby ensuring the normal operation of the system.

[0059] The outer shielding member 2 is disposed outside the storage container 1 to shield the waste material in the storage container 1 from radiation.

[0060] It can be understood that according to the ball crushing tank for the pebble bed high temperature reactor provided by the embodiment of the present invention, the storage container 1 is placed in the outer shielding member 2, so that the storage container 1 and the outer shielding member 2 can be manufactured separately, which greatly reduces the process difficulty of manufacturing the storage container 1 and the outer shielding member 2, and can significantly shorten the manufacturing period, simplify the detection process, and thus reduce the manufacturing cost. Compared with the related art, the ball crushing tank for the pebble bed high temperature reactor provided by the embodiment of the present invention can solve the technical problem of on-site temporary storage of large-capacity, highly radioactive spherical elements; and because the ball crushing tank provided by the embodiment of the present invention is provided with a side feed hole 15 and a top feed hole 16 at the same time, online loading and offline loading can be realized through the two feed ports, which meets the on-site storage of broken balls, debris, dust and good balls during normal operation and maintenance.

[0061] According to one embodiment of the present invention, the storage container 1 includes a top shielding component 13, a cylinder segment 12 and a bottom shielding component 11. The cylinder segment 12 is a hollow structure with openings at both ends. Multiple cylinder segments 12 can be connected in series to increase the length / depth of the storage container 1. The top shielding component 13 is sealed and connected to the opening at one end of the cylinder segment 12. The bottom shielding component 11 is sealed and connected to the opening at the other end of the cylinder segment 12. An accommodating cavity is formed among the top shielding component 13, the cylinder segment 12 and the bottom shielding component 11. The side feed hole 15, the top feed hole 16 and the air inlet hole 18 are arranged on the top shielding component 13.

[0062] The top shielding component 13 and the bottom shielding component 11 can be formed by forging, so that the storage container 1 becomes a pressure container, and the top shielding component 13, the bottom shielding component 11 and the outer shielding component 2 together constitute the main shielding, which is used to safely and reliably protect the personnel and external equipment from excessive exposure to gamma rays from the broken balls, debris and dust in the storage container 1.

[0063] In some embodiments, due to the influence of the installation orientation of the goal tube 7, part of the top surface 20 of the top shielding component 13 is processed into a slope surface 21, which facilitates the drilling of the side feed hole 15, and the top surface 20 is also formed with a flat cut surface 22.

[0064] It can be understood that the storage container 1 is welded as a whole by the top shielding component 13, the cylinder section 12 and the bottom shielding component 11. The steel top shielding component 13 is pressure-bearing and can be used to configure related accessories, such as additional shielding, material level agitator, feed port assembly 5, etc. By arranging the steel top shielding component 13 and the bottom shielding component 11 on the storage container 1, the manufacturing difficulty and cost are significantly reduced compared with casting high-density metal or alloy in the container, or the outer shielding member 2 including the top and bottom shielding components.

[0065] According to one embodiment of the present invention, the outer shielding member 2 includes a cylindrical outer shell and a high-density metal filler 27. The cylindrical outer shell is sleeved on the outside of the storage container 1, and an annular cavity is formed in the cylindrical outer shell. The high-density metal filler 27 is arranged in the annular cavity for shielding lateral radiation in the storage container 1.

[0066] It can be understood that the cylindrical outer shell can be an integral structure or can be composed of multiple parts. The sealed and complete outer shielding component 2 has a good shielding effect and is used to safely and reliably protect personnel and external equipment from excessive exposure to gamma rays from broken balls, debris and dust in the storage container 1.

[0067] In some embodiments, the cylindrical outer shell includes an inner cylinder 25, an outer cylinder 26, an annular bottom plate 24 and an annular top plate 28. The inner cylinder 25 is sleeved on the outside of the storage container 1, the outer cylinder 26 is sleeved on the outside of the storage container 1 and is coaxially arranged with the inner cylinder 25, an annular gap is formed between the inner cylinder 25 and the outer cylinder 26, the annular bottom plate 24 is connected to the bottom of the inner cylinder 25 and the outer cylinder 26, the annular top plate 28 is connected to the top of the inner cylinder 25 and the outer cylinder 26, and an annular cavity is formed between the annular bottom plate 24, the inner cylinder 25, the outer cylinder 26 and the annular top plate 28.

[0068] It can be understood that the outer shielding member 2 includes an annular bottom plate 24, an inner cylinder 25, an outer cylinder 26, a high-density metal filler 27 and an annular top plate 28. The inner cylinder 25 and the outer cylinder 26 are welded to the annular bottom plate 24 to form a deep cylindrical container with a double-layer cylindrical frame. It is convenient to cast high-density metal or alloy into the double-layer open container to manufacture a compact shield. After the casting is completed, the outer shielding member 2 is manufactured through fine processing and welding of the annular top plate 28. The annular top plate 28 can also be used as a part of the double-layer cylindrical frame, by partially opening a casting hole, using a suitable casting process, and then partially processing and filling the top plate to complete the manufacture of the outer shielding member 2.

[0069] According to one embodiment of the present invention, the ball crushing tank for the pebble bed high temperature reactor further includes a bottom plate 3 and / or a pressure cover 4.

[0070] The bottom plate 3 is arranged at the bottom of the storage container 1 and the outer shielding member 2, and the bottom plate 3 is connected to the outer shielding member 2. The pressure cover 4 is arranged at the top of the storage container 1 and the outer shielding member 2, and the pressure cover 4 is connected to the outer shielding member 2, and the pressure cover 4 is used to fix the storage container 1.

[0071] It can be understood that the chassis 3 and the outer shielding member 2 , the pressure cover 4 and the outer shielding member 2 , and the pressure cover 4 and the top shielding member 13 can all be connected by a bolt structure or a snap-fit ​​structure.

[0072] The chassis 3 is placed at the bottom of the storage container 1 and the outer shielding member 2. The outer shielding member 2 is connected to the outer plane 44 of the chassis 3. The outer shielding member 2 is connected to the chassis 3 as a whole through the first group of bolt holes 45 and fasteners. The gland 4 is arranged on the top of the outer shielding member 2. The outer side wall of the top shielding member 13 is formed with a stepped stop 23. The gland 4 is clamped to the stop 23 of the top shielding member 13 and is connected to the outer shielding member 2 as a whole through the third group of bolt holes 52 and fasteners.

[0073] A countersunk hole 43 is formed on the side of the chassis 3 facing the storage container 1 , and a boss 14 is formed on the side of the bottom shielding component 11 facing the chassis 3 . The boss 14 is limited in the countersunk hole 43 of the chassis 3 . The storage container 1 is fixed in the outer shielding component 2 by the chassis 3 and the pressure cover 4 .

[0074] In some embodiments, the outer side wall of the chassis 3 is formed with a hoisting hole 46, which helps to fix and transport the ball crushing jar.

[0075] The top shielding component 13 is thinned at a position corresponding to the plane section 22 , and the pressure cover 4 is also thinned at a position corresponding to the plane section 22 , forming an annular surface 50 and longitudinal sections 51 at both ends of the annular surface 50 on one side.

[0076] In order to compensate for the excessive exposure of the top shielding component 13 of the storage container to the highly radioactive materials in the container due to gamma rays, a shielding reinforcement plate 8 is additionally provided, on which a chamfered surface 48 adapted to the sloped surface 21 of the top shielding component 13 and a chamfered cut 47 for avoiding the entry of the ball tube 7 are provided. The shielding reinforcement plate 8 is connected to the outer shielding component 2 through a second set of bolt holes 49 and fasteners, so as to press the pressure cover 4 and the storage container 1 tightly.

[0077] Two lifting ears are also provided on the top shielding component 13 of the storage container 1, including a first lifting ear 19a and a second lifting ear 19b. The chassis 3, the outer shielding component 2, the pressure cover 4 and the fixed storage container 1 are lifted as a whole by the lifting ears 19a and 19b.

[0078] According to the ball crushing tank for a pebble bed high temperature reactor provided by an embodiment of the present invention, the chassis 3 is arranged at the bottom of the storage container 1 and the outer shielding member 2, and the pressure cover 4 is placed on the top of the storage container 1 and the outer shielding member 2. This configuration is more conducive to the casting of the high-density metal layer in the outer shielding member 2, as well as the assembly, testing and transportation of the overall structure of the ball crushing tank.

[0079] In some embodiments, the ball crushing tank for the pebble bed high temperature reactor further includes a feed port assembly 5, which is detachably connected to the top feed hole 16, and the feed port assembly 5 is used to receive waste materials when the system fails.

[0080] During the process of troubleshooting the system, the radioactive broken balls, debris, dust and good balls in the pipeline and equipment are transported offline to the storage container 1 for storage through the feed port assembly 5. The feed port assembly 5 includes a hole plug 29 with a hole and an inclined through assembly 30 connected as one body. A feed channel is formed in the hole plug 29 and the inclined through assembly 30. The hole plug 29 is connected to the top shielding component 13 of the storage container 1 through fasteners and seals. After the feed port assembly 5 is removed as a whole, the waste in the storage container 1 can be transferred from the top feed hole 16 in conjunction with the air inlet 18. The feed end of the feed channel, that is, the end away from the hole plug 29, avoids the axis of the top feed hole 16, and can avoid radiation from the waste in the storage container 1.

[0081] The inclined passage assembly 30 includes a feed chamber 38, a feed port 32, a feed elbow 33, a feed pipe 34, a flange 35, a second flange cover 36 and a shielding column 31. The feed chamber 38, the feed port 32, the feed elbow 33, the feed pipe 34 and the flange 35 constitute an offline feed channel. By opening the second flange cover 36, the good balls, broken balls, debris and dust that have been cleared of the fault can be loaded into the storage container 1 through the channel through a special tool. Since the top feed hole 16 and the feed chamber 38 are connected, a shielding column 31 is set just above the axis of the top feed hole 16 to protect the personnel and equipment just above from excessive doses of gamma rays.

[0082] In some embodiments, a detection hole 17 is further formed on the top of the storage container 1 , and the detection hole 17 is used to connect to a detection hole plug or a material level detection component 6 .

[0083] The material level detection component 6 is a permanent magnet transmission metal stirrer driven by a micromotor, and its detection head is the stirring head 42 of the stirrer. The stirring head 42 includes a stirring shaft system and blades. After passing through the detection hole 17, it is placed at the top position off the center in the storage container 1. The metal stirrer is driven by a permanent magnet driven magnetic transmission device 41. The outer magnetic rotor of the magnetic transmission device 41 is connected to the stirring shaft system and blades, and the inner magnetic rotor is connected to the micromotor. The micromotor is installed on the top shielding component 13 through the motor support 40, which improves the position stability of the material level detection component 6.

[0084] Under normal operating conditions, considering that dust, debris and broken balls gradually and slowly accumulate in the ball crushing tank, it takes a long time to reach the material level. The micro motors that are not resistant to radiation are disassembled and stored in the warehouse to reduce excessive exposure to them by the highly radioactive gamma-ray materials in the storage container 1.

[0085] Under the material level detection condition, the material level detection component 6 is installed at the detection hole 17. If the material level reaches or submerges the stirring head 42 of the metal stirrer, when the stirrer is running, the stirring shaft and blades contact the material in the container and are blocked by the material. Under the action of resistance and friction, the resistance signal of the stirring head 42 is collected and processed by the external electrical control box and converted into an electrical signal. When the threshold is exceeded, it can be judged that the material level has been reached. The main purpose of adopting this offline passive detection method is to solve technical problems such as temperature resistance, radiation resistance, and dust resistance that cannot be solved by various industrial level sensors.

[0086] The isolation cover is connected to the top shielding component 13 of the storage container 1 through fasteners and seals. The isolation cover of the magnetic actuator changes the dynamic seal into a static seal to achieve reliable sealing in a helium environment.

[0087] In the material level detection condition, a shielding sleeve 9 is provided on the top of the storage container 1 at a position corresponding to the detection hole 17 , a shielding chamber 39 is formed inside the shielding sleeve 9 , and the shielding sleeve 9 is connected to the storage container 1 or the material level detection component 6 .

[0088] It can be understood that since the level agitator passes through the top shielding component 13 of the storage container 1, the thickness of the shielding layer is weakened, and therefore a shielding sleeve 9 is provided directly above the level detection component. By reinforcing the shielding performance of the shielding sleeve 9, the personnel and equipment directly above are protected from excessive doses of gamma rays.

[0089] In summary, the ball crushing tank for a high-temperature pebble bed reactor provided according to an embodiment of the present invention comprises a storage container 1, a ball inlet pipe 7, a first flange cover 37 and an outer shielding member 2; a sealed accommodating chamber is formed in the storage container 1, and a side feed hole 15, a top feed hole 16 and an air inlet 18 connected to the accommodating chamber are formed on the top of the storage container 1; the ball inlet pipe 7 is connected to the side feed hole 15, and the end of the ball inlet pipe 7 away from the side feed hole 15 is used to connect to the system pipeline; the first flange cover 37 is detachably connected to the air inlet 18; and the outer shielding member 2 is arranged on the outside of the storage container 1. The ball inlet pipe 7 is used to receive the broken balls, debris and dust generated during the normal operation of the system pipeline. When the storage container 1 is fully loaded, the top feed hole 16 is opened, and the broken balls, debris and dust are sucked and transported to the external transfer container through a special tooling. During the suction process, the first flange cover 37 is opened to let air in from the air inlet 18, which is conducive to the smooth suction of the material.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball crushing tank for a pebble bed high temperature reactor, characterized in that: include: A storage container is formed with a sealed accommodating cavity, and a side feed hole, a top feed hole and an air inlet hole connected to the accommodating cavity are formed on the top of the storage container; A ball pipe is connected to the side feed hole, and an end of the ball pipe facing away from the side feed hole is used to be connected to a system pipeline; a first flange cover, detachably connected to the air inlet; An outer shielding member, disposed outside the storage container; A feed inlet assembly is detachably connected to the top feed hole, and the feed inlet assembly is used to receive waste materials when the system fails.

2. The ball crushing tank for a pebble bed high temperature reactor according to claim 1, characterized in that: The storage container comprises: The barrel section is a hollow structure with openings at both ends; a top shielding member, sealingly connected to the opening at one end of the barrel section; The bottom shielding component is sealed and connected to the opening at the other end of the barrel section. The accommodating cavity is formed among the top shielding component, the barrel section and the bottom shielding component.

3. The ball crushing tank for a pebble bed high temperature reactor according to claim 1, characterized in that: The outer shielding member comprises: A cylindrical outer shell is sleeved on the outer side of the storage container, and an annular cavity is formed in the outer shell; A high-density metal filler is arranged in the annular cavity, and the high-density metal filler is used to shield the lateral radiation in the storage container.

4. The ball crushing tank for a pebble bed high temperature reactor according to claim 3, characterized in that: The cylindrical outer shell comprises: An inner cylinder, sleeved on the outer side of the storage container; The outer cylinder is sleeved on the outer side of the inner cylinder and is coaxially arranged with the inner cylinder; An annular bottom plate connected to the bottom of the inner tube and the outer tube; An annular top plate is connected to the tops of the inner cylinder and the outer cylinder, and the annular cavity is formed among the inner cylinder, the outer cylinder, the annular bottom plate and the annular top plate.

5. The ball crushing tank for a pebble bed high temperature reactor according to claim 1, characterized in that: Also includes: A chassis, disposed at the bottom of the storage container and the outer shielding member, and connected to the outer shielding member; And / or, a pressure cover is arranged on the top of the storage container and the outer shielding member and connected to the outer shielding member, and the pressure cover is used to fix the storage container.

6. The ball crushing tank for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: The feed port assembly comprises: A hole plug connected to the top feed hole; An inclined through component is connected to the hole plug, and a feed channel is formed in the inclined through component and the hole plug, and a feed end of the feed channel avoids the axis of the top feed hole.

7. The ball crushing tank for a pebble bed high temperature reactor according to claim 6, characterized in that: The inclined through assembly includes a shielding column, and the shielding column corresponds to the axis of the top feed hole.

8. The ball crushing tank for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: The top of the storage container is also formed with a detection hole, and the detection hole is used to connect to a detection hole plug or a material level detection component; Under normal operating conditions, the detection hole is connected to the detection hole plug; In the material level detection working condition, the detection hole is connected to the material level detection component.

9. The ball crushing tank for a pebble bed high temperature reactor according to claim 8, characterized in that: In the material level detection working condition, a shielding sleeve is provided on the top of the storage container at a position corresponding to the detection hole, and the shielding sleeve is connected to the storage container or the material level detection component.

10. The ball crushing tank for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: The angle between the axis of the goal tube and the horizontal plane is greater than 35°.

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