Neutron reflector, radiation experimental device and neutron experimental device

Abstract

A neutron reflector, a radiation experimental device and a neutron experimental device. The neutron reflector is arranged outside the core. The neutron reflector includes a plurality of moving components and a driving component. The plurality of moving components can move relative to the core to reflect neutrons overflowing from the core. The driving component can drive the plurality of moving components to move toward or away from the core along a preset trajectory. The driving component can be used to drive the moving components to move toward or away from the core, so that when some moving components are away from the core, the operator can replace the moving components away from the core according to the needs, thereby improving the safety of the operator.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of nuclear reactions, and in particular to a neutron reflector, a radiation experimental device and a neutron experimental device. Background Art

[0002] When designing and using critical devices, the reflector layer is an important component of the device and plays an important role in reflecting neutrons in the core and reducing the critical volume of the core. After the design and processing of common critical devices are completed, the reflector layer is fixed and difficult to replace. Especially for solution-type critical devices containing uranium or plutonium, the core needs to be disassembled to replace the reflector layer, which often easily causes leakage and contamination of radioactive solutions. The operation process is cumbersome and takes a long time. Summary of the invention

[0003] Embodiments of the present invention provide a neutron reflector, a radiation experimental device and a neutron experimental device.

[0004] A neutron reflector in an embodiment of the present invention is arranged on the outside of the core, and the neutron reflector includes multiple moving components and a driving component; the multiple moving components can move relative to the core to reflect neutrons overflowing from the core; the driving component can drive the multiple moving components to move along a preset trajectory toward or away from the core.

[0005] A radiation experiment device according to an embodiment of the present invention is arranged on the outside of a core, and includes a plurality of moving components and a driving component; the plurality of moving components can move relative to the core, and the moving components include a moving shell provided with a containing cavity for placing irradiated materials, so as to irradiate the moving shell with neutrons overflowing from the core; the driving component can drive the plurality of moving components to move along a preset trajectory toward or away from the core.

[0006] A neutron experimental device according to an embodiment of the present invention is arranged on the outside of the core, and the neutron experimental device includes multiple mobile components and partitions; the multiple mobile components can move relative to the core, and each mobile component includes a mobile shell provided with a accommodating cavity for placing reflective materials; the partition is located in the accommodating cavity to divide the accommodating cavity into multiple independent placement cavities along the circumferential direction, and at least one placement cavity is in a cavity state.

[0007] In the neutron reflection layer of the embodiment of the present invention, the driving assembly can be used to drive the mobile assembly to move closer to or away from the core. According to needs, when some mobile assemblies are away from the core, the operator can replace the mobile assembly away from the core, thereby improving the safety of the operator.

[0008] Additional aspects and advantages of the embodiments of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0010] Figure 1 FIG. 1 is a top view of a neutron reflector according to an embodiment of the present invention.

[0011] Figure 2 It is a schematic structural diagram of a neutron reflector according to an embodiment of the present invention.

[0012] Figure 3 yes Figure 2 Schematic diagram of the structure of the mobile components of the neutron reflector.

[0013] Figure 4 It is a structural schematic diagram of a radiation experimental device according to an embodiment of the present invention.

[0014] Figure 5 yes Figure 4 Schematic diagram of the structure of the mobile components of the radiation experimental device.

[0015] Figure 6 It is a structural schematic diagram of a neutron experimental device according to an embodiment of the present invention.

[0016] Figure 7 yes Figure 6 Schematic diagram of the structure of the mobile components of the neutron experimental device.

[0017] Figure 8 yes Figure 1 Side view of a combined reflective layer.

[0018] Description of main component symbols:

[0019] 10. Neutron reflector; 20. Radiation experimental device; 30. Neutron experimental device;

[0020] 100, moving assembly; 110, moving housing; 111, first plate; 112, second plate; 113, third plate; 114, fourth plate; 120, partition; 130, accommodating chamber; 131, placement chamber;

[0021] 200, driving assembly; 210, slide rail portion; 220, moving portion;

[0022] 40. Core. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Figure 1 It is a top view of the neutron reflector 10 according to the embodiment of the present invention. Figure 2 is a schematic structural diagram of the neutron reflector 10 according to an embodiment of the present invention. Figure 1 and Figure 2 The neutron reflector 10 is arranged outside the core 40. The neutron reflector 10 includes a plurality of moving components 100 and a driving component 200. The neutron reflector 10 refers to a coating layer of nuclear charge to prevent neutron leakage. During the nuclear reaction process, the neutron reflector 10 can reflect the neutrons released by the nuclear charge participating in the reaction but possibly leaked back to the reaction area, so that the neutrons participate in the nuclear reaction to improve the reaction efficiency, thereby significantly reducing the critical mass of the nuclear charge.

[0025] The plurality of mobile assemblies 100 can move relative to the core 40 to reflect neutrons overflowing from the core 40. The distance between each mobile assembly 100 and the core 40 can be adjusted. When a mobile assembly 100 needs to be repaired or replaced, it can be moved to a location away from the core 40 and then operated without replacing the entire neutron reflector 10, thereby saving materials and facilitating operation.

[0026] The driving assembly 200 can drive the plurality of mobile assemblies 100 to move along a preset trajectory toward or away from the core 40. The driving assembly 200 can be used to drive the mobile assemblies 100 to move toward or away from the core 40, so that when some of the mobile assemblies 100 are away from the core 40, the operator can replace the mobile assemblies 100 away from the core 40 according to the needs, thereby improving the safety of the operator.

[0027] In some embodiments, each mobile component 100 can be independently operated and run, that is, one or several mobile components 100 can be controlled to move, so as to facilitate corresponding operations on the mobile components 100 that are damaged or need to be replaced.

[0028] In other embodiments, the plurality of moving assemblies 100 may be operated and run synchronously, that is, the plurality of moving assemblies 100 may move together.

[0029] The mobile assembly 100 includes a mobile housing 110. The mobile housing 110 is provided with a receiving cavity 130 for placing a reflective material. That is, the mobile assembly 100 includes the mobile housing 110 and the reflective material, and the reflective material is located in the mobile housing 110, and neutrons can be reflected back to the reaction zone through the reflective material.

[0030] In some embodiments, the moving housing 110 is made of stainless steel to accommodate the reflective material so that the reflective material is arranged outside the core 40 .

[0031] In some embodiments, the reflective material may be one or more of the following materials: water, concrete, and graphite. Each moving component 100 may contain water alone, concrete alone, or graphite alone; or water and concrete, water and graphite, concrete and graphite; or water, concrete, and graphite. When multiple reflective materials are used, the multiple reflective materials are located in independent positions.

[0032] Specifically, when the reflective material is a solid reflective material such as concrete or graphite, it can be placed in the accommodating cavity 130 in a stacked manner.

[0033] Specifically, when the reflective material is a liquid reflective material such as water, it can be injected into the accommodating cavity 130 .

[0034] The projection of the movable shell 110 on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core 40 ; the projection of the movable shell 110 on the second preset projection plane is a fan ring, and the second preset projection plane is perpendicular to the axis of the core 40 .

[0035] Figure 3 yes Figure 2 A schematic structural diagram of the mobile assembly 100 of the neutron reflector 10. Figure 3 The moving housing 110 has a first plate body 111 and a second plate body 112 which are arranged opposite to each other in the circumferential direction. Specifically, the first plate body 111 and the second plate body 112 are straight plates.

[0036] The angle between the first plate 111 and the second plate 112 is a first preset angle. The sum of the first preset angles of the plurality of mobile assemblies 100 is equal to 360°, that is, when the plurality of mobile assemblies 100 are located outside the core 40, neutrons leaking in the radial direction of the core 40 can be reflected back to the reaction zone at 360°, thereby preventing neutrons from not passing through the mobile assembly 100.

[0037] In some embodiments, a plurality of movable assemblies 100 are spliced ​​together to surround the outside of the core 40 , and can be moved to cover or reveal the circumferential side of the core 40 .

[0038] Specifically, a plurality of moving assemblies 100 are spliced ​​to form an annular cylinder, the first plates 111 and the second plates 112 of adjacent moving assemblies 100 are in contact with each other, and the outer wall of the annular cylinder with a smaller inner diameter completely fits the outer wall of the core 40 .

[0039] See also Figure 3 The neutron reflector 10 further includes a partition 120. The partition 120 is located in the accommodating cavity 130 to divide the accommodating cavity 130 into a plurality of mutually independent placement cavities 131 in the radial direction, and a reflective material is placed in at least one placement cavity 131. The placement cavity 131 in which the reflective material is placed can reflect neutrons, and the thickness of the cavity in which each moving component 100 can reflect neutrons in the radial direction is the working thickness of the neutron reflector 10. By placing the partition 120 at different positions in the moving housing 110, the working thickness of the neutron reflector 10 can be changed.

[0040] In some embodiments, different reflective materials may be placed in different placement cavities 131 in each moving component 100 , or the same reflective material may be placed in the same placement cavities 131 .

[0041] See also Figure 2 The movable shell 110 has a third plate 113 and a fourth plate 114 which are arranged opposite to each other in the radial direction. The projections of the third plate 113 and the fourth plate 114 on the second preset projection plane are arcs with the same center. The second preset projection plane is perpendicular to the axis of the core 40. The projections of the partition 120 and the third plate 113 on the second preset projection plane are arcs with the same center.

[0042] That is to say, the third plate body 113 , the partition plate 120 and the fourth plate body 114 are all arc-shaped plates.

[0043] The arc radius of the third plate 113 is smaller than the arc radius of the fourth plate 114. The third plate 113 fits tightly with the outer wall shell of the core 40 to avoid the introduction of air gaps and impurities.

[0044] The arc radius of the partition 120 is greater than or equal to the arc radius of the third plate 113, and less than or equal to the arc radius of the fourth plate 114. When the arc radius of the partition 120 is equal to the arc radius of the third plate 113 or the arc radius of the partition 120 is equal to the arc radius of the fourth plate 114, the working thickness of the neutron reflector 10 is the distance between the third plate 113 and the fourth plate 114; when the arc radius of the partition 120 is greater than the arc radius of the third plate 113 and less than the arc radius of the fourth plate 114, the partition 120 is located between the third plate 113 and the fourth plate 114, and the working thickness of the neutron reflector 10 is less than the distance between the third plate 113 and the fourth plate 114.

[0045] The device also includes a detector, which is used to measure the power, neutron injection rate or gamma dose of the reactor core 40. The placement position of the detector can be changed based on the filling material inside the mobile shell 110. During a single experiment, the detector and the mobile assembly 100 are relatively stationary, that is, the detector is located in the placement cavity 131, and the detector is fixed relative to the inner wall of the mobile shell 110. When the mobile assembly 100 moves, the detector does not shake in the placement cavity 131. According to needs, the detector located in the placement cavity 131 of the mobile shell 110 can be replaced when the mobile assembly 100 is away from the core 40 to improve the safety of the operator.

[0046] When the reflective material in the placement cavity 131 is solid, the solid reflective material is stacked in the placement cavity 131 to form a position where the detector can be placed. The detector abuts against the solid reflective material to prevent the detector from shaking.

[0047] When the reflective material in the placement cavity 131 is liquid, the liquid is directly injected into the placement cavity 131. Since the liquid is in a flowing state, to prevent the detector from shaking, the detector can be fixedly connected to the inner wall of the placement cavity 131 through a connecting piece, such as a bracket.

[0048] Figure 8 yes Figure 1 Side view of the combined reflective layer. Figure 8 The driving assembly 200 includes a driving part, a slide rail part 210 extending along a preset trajectory direction, and a moving part 220 movable on the slide rail part 210. The driving part can drive the moving part 220 to move along the preset trajectory of the slide rail part 210 to drive the moving assembly 100 connected to the moving part 220 to approach or move away from the core 40.

[0049] Specifically, the driving part, the slide rail part 210 and the moving part 220 form a set of driving devices, and the driving assembly 200 includes a plurality of driving devices. The driving devices are arranged in a one-to-one correspondence with the moving assembly 100 .

[0050] In some embodiments, the moving part 220 includes universal wheels located at four diagonal positions, and the driving motor drives the four universal wheels to move along the track.

[0051] Specifically, the driving assembly 200 includes a driving motor, a track extending along a preset track direction, and a rotating wheel movable along the track. The driving motor can drive the rotating wheel to move along the preset track of the track to drive the moving assembly 100 connected to the rotating wheel to approach or move away from the core 40.

[0052] In some embodiments, the first preset angles of each moving assembly 100 are the same.

[0053] Preferably, the neutron reflector 10 includes three moving assemblies 100 and three sets of driving devices, the first preset angle of each moving assembly 100 is 120°, each set of driving devices is used to drive a moving assembly 100 away from or close to the core 40, and the shape of each moving assembly 100 is the same. When the neutron reflector 10 includes more than three moving assemblies 100, the cost of the neutron reflector 10 will increase; when the neutron reflector 10 includes less than three moving assemblies 100, the mass of a single moving assembly 100 is heavy, and it is not easy for the driving assembly 200 to drive it to move.

[0054] Figure 4 2 is a schematic structural diagram of a radiation experiment device 20 according to an embodiment of the present invention. Figure 4 The radiation experiment device 20 is disposed outside the core 40. The radiation experiment device 20 includes a plurality of moving components 100 and a driving component 200.

[0055] Multiple mobile components 100 can move relative to the core 40, and the distance between each mobile component 100 and the core 40 can be adjusted. When a mobile component 100 needs to be repaired or replaced, it can be moved to the location of the core 40 alone and then operated on without replacing the entire radiation experimental device 20, thereby saving materials and facilitating operation.

[0056] The mobile assembly 100 includes a mobile housing 110 provided with a housing 130 for placing irradiation materials, so that the mobile housing 110 is irradiated with neutrons overflowing from the core 40. That is, the mobile assembly 100 includes the mobile housing 110 and the irradiation materials, and the irradiation materials are located in the mobile housing 110, so that the mobile housing 110 is irradiated with neutrons overflowing from the core 40. A test object can be placed in the mobile housing 110 to test the irradiation of the neutrons. The irradiation material can be one or more of the following materials: silicon carbide, 238 U. 237 Np.

[0057] In some embodiments, the moving housing 110 is made of stainless steel to accommodate the irradiated material so that the irradiated material is arranged outside the core 40 .

[0058] The driving assembly 200 can drive the plurality of moving assemblies 100 to move toward or away from the core 40 along a preset trajectory.

[0059] The driving assembly 200 can be used to drive the mobile assembly 100 to move closer to or away from the core 40. According to needs, when part of the mobile assembly 100 is away from the core 40, the operator can replace the mobile assembly 100 away from the core 40, thereby improving the safety of the operator.

[0060] In some embodiments, each mobile component 100 can be independently operated and run, that is, one or several mobile components 100 can be controlled to move, so as to facilitate corresponding operations on the mobile components 100 that are damaged or need to be replaced.

[0061] In other embodiments, the plurality of moving assemblies 100 may be operated and run synchronously, that is, the plurality of moving assemblies 100 may move together.

[0062] The projection of the movable shell 110 on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core 40 ; the projection of the movable shell 110 on the second preset projection plane is a fan ring, and the second preset projection plane is perpendicular to the axis of the core 40 .

[0063] Figure 5 yes Figure 4 A schematic structural diagram of the mobile component 100 of the radiation experimental device 20. Figure 5 The moving housing 110 has a first plate body 111 and a second plate body 112 which are arranged opposite to each other in the circumferential direction. Specifically, the first plate body 111 and the second plate body 112 are straight plates.

[0064] The angle between the first plate 111 and the second plate 112 is a first preset angle. The sum of the first preset angles of the plurality of mobile assemblies 100 is equal to 360°. That is, when the plurality of mobile assemblies 100 are located outside the core 40, 360° utilization of neutrons leaked in the radial direction of the core 40 can be achieved to improve efficiency.

[0065] In some embodiments, a plurality of movable assemblies 100 are spliced ​​together to surround the outside of the core 40 , and can be moved to cover or reveal the circumferential side of the core 40 .

[0066] Specifically, a plurality of moving assemblies 100 are spliced ​​to form an annular cylinder, the first plates 111 and the second plates 112 of adjacent moving assemblies 100 are in contact with each other, and the outer wall of the annular cylinder with a smaller inner diameter completely fits the outer wall of the core 40 .

[0067] See also Figure 5 , the radiation experiment device 20 further includes a partition 120. The partition 120 is located in the accommodating chamber 130 to divide the accommodating chamber 130 into a plurality of mutually independent placement chambers 131 in the radial direction, and an irradiated material is placed in at least one placement chamber 131. The placement chamber 131 in which the irradiated material is placed can be used to perform experiments using neutrons, and the thickness of the cavity in which each mobile assembly 100 can perform experiments using neutrons in the radial direction is the working thickness of the radiation experiment device 20. By placing the partition 120 at different positions in the mobile housing 110, the working thickness of the radiation experiment device 20 can be changed.

[0068] In some embodiments, different irradiation materials may be placed in different placement cavities 131 in each moving assembly 100 , or the same irradiation material may be placed in the same placement cavities 131 .

[0069] See also Figure 4 The movable shell 110 has a third plate 113 and a fourth plate 114 which are arranged opposite to each other in the radial direction. The projections of the third plate 113 and the fourth plate 114 on the second preset projection plane are arcs with the same center. The second preset projection plane is perpendicular to the axis of the core 40 .

[0070] The projections of the partition 120 and the third plate 113 on the second preset projection plane are arcs with the same center. In other words, the third plate 113, the partition 120 and the fourth plate 114 are all arc-shaped plates.

[0071] The arc radius of the third plate 113 is smaller than the arc radius of the fourth plate 114. The third plate 113 is closely fitted to the outer wall of the core 40.

[0072] The arc radius of the partition 120 is greater than or equal to the arc radius of the third plate 113, and less than or equal to the arc radius of the fourth plate 114. When the arc radius of the partition 120 is equal to the arc radius of the third plate 113 or the arc radius of the partition 120 is equal to the arc radius of the fourth plate 114, the working thickness of the radiation experiment device 20 is the distance between the third plate 113 and the fourth plate 114; when the arc radius of the partition 120 is greater than the arc radius of the third plate 113 and less than the arc radius of the fourth plate 114, the partition 120 is located between the third plate 113 and the fourth plate 114, and the working thickness of the radiation experiment device 20 is less than the distance between the third plate 113 and the fourth plate 114.

[0073] The device also includes a detector, which is used to measure the power, neutron injection rate or gamma dose of the reactor core 40. The placement position of the detector can be changed based on the filling material inside the mobile shell 110. During a single experiment, the detector and the mobile assembly 100 are relatively stationary, that is, the detector is located in the placement cavity 131, and the detector is fixed relative to the inner wall of the mobile shell 110. When the mobile assembly 100 moves, the detector does not shake in the placement cavity 131. According to the experimental requirements, when multiple mobile assemblies 100 are away from the core 40, the detector located in the placement cavity 131 of the mobile shell 110 can be replaced to improve the safety of the operator.

[0074] When the reflective material in the placement cavity 131 is solid, the solid reflective material is stacked in the placement cavity 131 to form a position where the detector can be placed. The detector abuts against the solid reflective material to prevent the detector from shaking.

[0075] When the reflective material in the placement cavity 131 is liquid, the liquid is directly injected into the placement cavity 131. Since the liquid is in a flowing state, to prevent the detector from shaking, the detector can be fixedly connected to the inner wall of the placement cavity 131 through a connecting piece, such as a bracket.

[0076] The driving assembly 200 includes a driving part, a slide rail part 210 extending along a preset trajectory direction, and a moving part 220 movable on the slide rail part 210. The driving part can drive the moving part 220 to move along the preset trajectory of the slide rail part 210 to drive the moving assembly 100 connected to the moving part 220 to move closer to or away from the core 40.

[0077] The driving part, the slide rail part 210 and the moving part 220 form a set of driving devices, and the driving assembly 200 includes at least one set of driving devices. The driving devices are arranged in a one-to-one correspondence with the moving assembly 100.

[0078] In some embodiments, the moving part 220 includes universal wheels located at four diagonal positions, and the driving motor drives the four universal wheels to move along the track.

[0079] The driving assembly 200 includes a driving motor, a track extending along a preset track direction, and a rotating wheel movable along the track. The driving motor can drive the rotating wheel to move along the preset track of the track to drive the moving assembly 100 connected to the rotating wheel to approach or move away from the core 40.

[0080] In some embodiments, the first preset angles of each moving assembly 100 are the same.

[0081] Preferably, the radiation experiment device 20 includes three mobile assemblies 100 and three sets of driving devices, the first preset angle of each mobile assembly 100 is 120°, each set of driving devices is used to drive a mobile assembly 100 away from or close to the core 40, and the shape of each mobile assembly 100 is the same. When the radiation experiment device 20 includes more than three mobile assemblies 100, the cost of the radiation experiment device 20 will increase; when the radiation experiment device 20 includes less than three mobile assemblies 100, the mass of a single mobile assembly 100 is heavy, and the driving assembly 200 is not easy to drive it to move.

[0082] Figure 6 3 is a schematic structural diagram of a neutron experiment device 30 according to an embodiment of the present invention. Figure 6 The neutron experiment device 30 is disposed outside the core 40. The neutron experiment device 30 includes a plurality of moving components 100 and a partition plate 120.

[0083] Multiple mobile assemblies 100 can move relative to the core 40, and each mobile assembly 100 includes a mobile housing 110 provided with a receiving cavity 130 for placing a reflective material. The distance between each mobile assembly 100 and the core 40 can be adjusted. When a mobile assembly 100 needs to be repaired or replaced, it can be moved to a location away from the core 40 and then operated without replacing the entire neutron reflector 10, thereby saving materials and facilitating operation.

[0084] That is to say, the moving assembly 100 includes a moving shell 110 and a reflective material. The reflective material is located inside the moving shell 110 and can reflect neutrons back to the reaction zone through the reflective material.

[0085] In some embodiments, the moving housing 110 is made of stainless steel to accommodate the reflective material so that the reflective material is arranged outside the core 40 .

[0086] In some embodiments, the reflective material is one or more of the following materials: water, concrete, and graphite. Each moving component 100 may contain water alone, concrete alone, or graphite alone; or water and concrete, water and graphite, concrete and graphite; or water, concrete, and graphite. When multiple reflective materials are used, the multiple reflective materials are located in independent positions.

[0087] Specifically, when the reflective material is a solid reflective material such as concrete or graphite, it can be placed in a stacked manner in the accommodation cavity 130. Specifically, when the reflective material is a liquid reflective material such as water, it can be injected into the accommodation cavity 130.

[0088] Figure 7 yes Figure 6 A schematic structural diagram of the mobile assembly 100 of the neutron experimental device 30. Figure 7 The partition 120 is located in the accommodation cavity 130 to divide the accommodation cavity 130 into a plurality of mutually independent placement cavities 131 along the circumferential direction, and at least one placement cavity 131 is in an empty state to allow neutrons of the core 40 to pass through the neutron experiment device 30, and the neutrons can be used to test the object to be tested. The empty state of the placement cavity 131 means that no reflective material is placed in the placement cavity 131.

[0089] The placement cavity 131 with the reflective material can reflect the neutrons, and the placement cavity 131 without the reflective material can allow the neutrons to pass through. The thickness of the cavity of each mobile assembly 100 that allows the neutrons to pass through in the circumferential direction is the working thickness of the neutron experimental device 30. By placing the partition 120 at different positions in the mobile housing 110, the working thickness of the neutron experimental device 30 can be changed.

[0090] In some embodiments, different reflective materials may be placed in different placement cavities 131 in each moving component 100 , or the same reflective material may be placed in the same placement cavities 131 .

[0091] The projection of the movable shell 110 on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core 40 ; the projection of the movable shell 110 on the second preset projection plane is a fan ring, and the second preset projection plane is perpendicular to the axis of the core 40 .

[0092] See also Figure 7 The moving housing 110 has a first plate body 111 and a second plate body 112 which are arranged opposite to each other in the circumferential direction. Specifically, the first plate body 111 and the second plate body 112 are straight plates.

[0093] The angle between the first plate 111 and the second plate 112 is a first preset angle, and the sum of the first preset angles of the multiple mobile assemblies 100 is equal to 360°, that is, when the multiple mobile assemblies 100 are located outside the core 40, neutrons in any direction can be allowed to pass through the neutron experimental device 30.

[0094] In some embodiments, a plurality of movable assemblies 100 are spliced ​​together to surround the outside of the core 40 , and can be moved to cover or reveal the circumferential side of the core 40 .

[0095] Specifically, a plurality of moving assemblies 100 are spliced ​​to form an annular cylinder, the first plates 111 and the second plates 112 of adjacent moving assemblies 100 are in contact with each other, and the outer wall of the annular cylinder with a smaller inner diameter completely fits the outer wall of the core 40 .

[0096] The projection of the partition 120 on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core 40. The projections of the partition 120, the first plate 111, and the second plate 112 on the second preset projection plane are three line segments, and the extension lines of the three line segments intersect at one point, and the second preset projection plane is perpendicular to the axis of the core 40. In other words, the first plate 111, the partition 120, and the second plate 112 are all straight plates.

[0097] The angle between the partition 120 and the first plate 111 is a second preset angle, which is less than or equal to the first preset angle. When the second preset angle is equal to the first preset angle, the working thickness of the neutron experiment device 30 is equal to the distance between the first plate 111 and the second plate 112; when the second preset angle is less than the first preset angle, the partition 120 is located between the first plate 111 and the second plate 112, and the working thickness of the neutron reflector 10 is less than the distance between the first plate 111 and the second plate 112.

[0098] The device also includes a detector, which is used to measure the power, neutron injection rate or gamma dose of the reactor core 40. The placement position of the detector can be changed based on the filling material inside the mobile shell 110. During a single experiment, the detector and the mobile assembly 100 are relatively stationary, that is, the detector is located in the placement cavity 131, and the detector is fixed relative to the inner wall of the mobile shell 110. When the mobile assembly 100 moves, the detector does not shake in the placement cavity 131. According to needs, the detector located in the placement cavity 131 of the mobile shell 110 can be replaced when the mobile assembly 100 is away from the core 40 to improve the safety of the operator.

[0099] When the reflective material in the placement cavity 131 is solid, the solid reflective material is stacked in the placement cavity 131 to form a position where the detector can be placed. The detector abuts against the solid reflective material to prevent the detector from shaking.

[0100] When the reflective material in the placement cavity 131 is liquid, the liquid is directly injected into the placement cavity 131. Since the liquid is in a flowing state, to prevent the detector from shaking, the detector can be fixedly connected to the inner wall of the placement cavity 131 through a connecting piece, such as a bracket.

[0101] See also Figure 6 The neutron experiment device 30 includes a driving assembly 200. The driving assembly 200 can drive multiple mobile assemblies 100 to move closer to or away from the core 40 along a preset trajectory. In this embodiment, the driving assembly 200 can be used to drive the mobile assembly 100 to move closer to or away from the core 40, so that when some mobile assemblies 100 are away from the core 40, the operator can replace the mobile assembly 100 away from the core 40 according to the needs, thereby improving the safety of the operator.

[0102] In some embodiments, each mobile assembly 100 can operate and function independently.

[0103] In other embodiments, multiple mobile assemblies 100 may operate and function synchronously.

[0104] In some embodiments, the driving assembly 200 includes a driving portion, a slide rail portion 210 extending along a preset track direction, and a moving portion 220 movable on the slide rail portion 210. The driving portion can drive the moving portion 220 to move along the preset track of the slide rail portion 210 to drive the moving assembly 100 connected to the moving portion 220 to move closer to or away from the core 40.

[0105] Specifically, the driving part, the slide rail part 210 and the moving part 220 form a set of driving devices, and the driving assembly 200 includes at least one set of driving devices. The driving devices are arranged in a one-to-one correspondence with the moving assembly 100.

[0106] In some embodiments, the moving part 220 includes universal wheels located at four diagonal positions, and the driving motor drives the four universal wheels to move along the track.

[0107] Specifically, the driving assembly 200 includes a driving motor, a track extending along a preset track direction, and a rotating wheel movable along the track. The driving motor can drive the rotating wheel to move along the preset track of the track to drive the moving assembly 100 connected to the rotating wheel to approach or move away from the core 40.

[0108] See also Figure 6 A plurality of movable assemblies 100 are spliced ​​together and surround the outside of the core 40 , and can be moved to cover or reveal the circumferential side of the core 40 .

[0109] In some embodiments, the first preset angles of each moving assembly 100 are the same.

[0110] Preferably, the neutron experiment device 30 includes three mobile assemblies 100 and three sets of driving devices, the first preset angle of each mobile assembly 100 is 120°, each set of driving devices is used to drive a mobile assembly 100 away from or close to the core 40, and the shape of each mobile assembly 100 is the same. When the neutron reflector 10 includes more than three mobile assemblies 100, the cost of the neutron reflector 10 will increase; when the neutron reflector 10 includes less than three mobile assemblies 100, the mass of a single mobile assembly 100 is heavy, and it is not easy for the driving assembly 200 to drive it to move.

[0111] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0112] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0113] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0114] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does 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.

[0116] While embodiments of the present invention have been shown and described, those skilled in the art will appreciate that numerous changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and scope of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A neutron reflector, arranged outside a core (40), characterized in that: The reflective layer comprises: A plurality of moving assemblies (100), wherein the plurality of moving assemblies (100) are movable relative to the core (40) to reflect neutrons overflowing from the core (40); A driving assembly (200), wherein the driving assembly (200) is capable of driving the plurality of moving assemblies (100) to move along a preset trajectory in a direction approaching or away from the core (40); The driving assembly (200) comprises a driving motor, a track extending along the preset track direction, and a rotating wheel movable along the track; The driving motor is capable of driving the rotating wheel to move along a preset track of the track, so as to drive the moving assembly (100) connected to the rotating wheel to move closer to or farther from the core (40); The plurality of movable assemblies (100) are spliced ​​together to surround the outside of the core (40), and are movable to cover or reveal the circumferential side surface of the core (40); The preset trajectory is set so that the plane where it is located is perpendicular to the axis of the core; The moving assembly (100) comprises: A mobile housing (110), wherein the mobile housing (110) is provided with a receiving cavity (130) for placing a reflective material; Wherein, the reflective material is one or more of the following materials: water, concrete, graphite; The projection of the movable shell (110) on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core (40); The projection of the movable shell (110) on the second preset projection plane is a sector ring, and the second preset projection plane is perpendicular to the axis of the core (40).

2. The reflective layer according to claim 1, characterized in that: The movable housing (110) comprises a first plate body (111) and a second plate body (112) which are arranged opposite to each other in a circumferential direction, and an angle between the first plate body (111) and the second plate body (112) is a first preset angle; The sum of the first preset angles of the plurality of moving components (100) is equal to 360°.

3. The reflective layer according to claim 2, characterized in that: The first preset angle of each moving component (100) is the same.

4. The reflective layer according to claim 1, characterized in that: The reflective layer further comprises: A partition (120), wherein the partition (120) is located in the accommodating cavity (130) so as to divide the accommodating cavity (130) into a plurality of mutually independent placement cavities (131) along a radial direction, and the reflective material is placed in at least one of the placement cavities (131).

5. The reflective layer according to claim 4, characterized in that: The movable shell (110) comprises a third plate (113) and a fourth plate (114) which are arranged opposite to each other in a radial direction, the projections of the third plate (113) and the fourth plate (114) on a second preset projection plane are circular arcs with the same center, and the second preset projection plane is perpendicular to the axis of the core (40); The projections of the partition plate (120) and the third plate body (113) on the second preset projection plane are arcs with the same center.

6. The reflective layer according to claim 5, characterized in that: The arc radius of the third plate body (113) is smaller than the arc radius of the fourth plate body (114); The arc radius of the partition plate (120) is greater than or equal to the arc radius of the third plate body (113), and less than or equal to the arc radius of the fourth plate body (114).

7. The reflective layer according to claim 4, characterized in that: The reflective layer further comprises: A detector is located in the placement cavity (131), and the position of the detector is fixed relative to the inner wall of the movable housing (110).

8. The reflective layer according to claim 7, characterized in that: The detector is fixedly connected to the inner wall of the placement cavity (131) via a connecting piece.

9. The reflective layer according to claim 1, characterized in that: The driving assembly (200) comprises a driving portion, a slide rail portion (210) extending along the direction of the preset track, and a moving portion (220) movable on the slide rail portion (210); The driving part, the slide rail part (210) and the moving part (220) form a set of driving devices, and the driving assembly (200) includes a plurality of sets of driving devices; The driving part is capable of driving the moving part (220) to move along a preset track of the slide rail part (210), so as to drive the moving assembly (100) connected to the moving part (220) to move closer to or farther from the core (40); The driving device and the moving assembly (100) are arranged in a one-to-one correspondence.

10. A radiation experiment device, arranged outside a core (40), characterized in that: include: A plurality of mobile assemblies (100), the plurality of mobile assemblies (100) being movable relative to the core (40), the mobile assemblies (100) comprising a mobile shell (110) provided with a containing cavity (130) for placing irradiated materials, so as to irradiate the mobile shell (110) with neutrons overflowing from the core (40); A driving assembly (200), wherein the driving assembly (200) is capable of driving the plurality of moving assemblies (100) to move along a preset trajectory in a direction approaching or away from the core (40); The driving assembly (200) comprises a driving motor, a track extending along the preset track direction, and a rotating wheel movable along the track; The driving motor is capable of driving the rotating wheel to move along a preset track of the track, so as to drive the moving assembly (100) connected to the rotating wheel to move closer to or farther from the core (40); The plurality of movable assemblies (100) are spliced ​​together to surround the outside of the core (40), and are movable to cover or reveal the circumferential side surface of the core (40); The preset trajectory is set so that the plane where it is located is perpendicular to the axis of the core; The projection of the movable shell (110) on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core (40); The projection of the movable shell (110) on the second preset projection plane is a sector ring, and the second preset projection plane is perpendicular to the axis of the core (40).

11. The device according to claim 10, characterized in that The movable housing (110) comprises a first plate body (111) and a second plate body (112) which are arranged opposite to each other in a circumferential direction, and an angle between the first plate body (111) and the second plate body (112) is a first preset angle; The sum of the first preset angles of the plurality of moving components (100) is equal to 360°.

12. The device according to claim 11, characterized in that When the device comprises a plurality of moving components (100), the first preset angle of each moving component (100) is the same.

13. The device according to claim 10, characterized in that The device also includes: A partition (120), wherein the partition (120) is located in the accommodating chamber (130) so as to divide the accommodating chamber (130) into a plurality of mutually independent placement chambers (131) along a radial direction, and the irradiated material is placed in at least one of the placement chambers (131).

14. The device according to claim 13, characterized in that The movable shell (110) comprises a third plate (113) and a fourth plate (114) which are arranged opposite to each other in a radial direction, the projections of the third plate (113) and the fourth plate (114) on a second preset projection plane are circular arcs with the same center, and the second preset projection plane is perpendicular to the axis of the core (40); The projections of the partition plate (120) and the third plate body (113) on the second preset projection plane are arcs with the same center.

15. The device according to claim 14, characterized in that The arc radius of the third plate body (113) is smaller than the arc radius of the fourth plate body (114); The arc radius of the partition plate (120) is greater than or equal to the arc radius of the third plate body (113), and less than or equal to the arc radius of the fourth plate body (114).

16. The device according to claim 13, characterized in that The device also includes: A detector is located in the placement cavity (131), and the position of the detector is fixed relative to the inner wall of the movable housing (110).

17. The device according to claim 16, characterized in that The detector is fixedly connected to the inner wall of the placement cavity (131) via a connecting piece.

18. The device according to claim 10, characterized in that The driving assembly (200) comprises a driving portion, a slide rail portion (210) extending along the direction of the preset track, and a moving portion (220) movable on the slide rail portion (210); The driving part, the slide rail part (210) and the moving part (220) form a set of driving devices, and the driving assembly (200) includes at least one set of driving devices; The driving part is capable of driving the moving part (220) to move along a preset track of the slide rail part (210), so as to drive the moving assembly (100) connected to the moving part (220) to move closer to or farther from the core (40); The driving device and the moving assembly (100) are arranged in a one-to-one correspondence.

19. A neutron experiment device, arranged outside a core (40), characterized in that: The device comprises: A plurality of mobile assemblies (100), the plurality of mobile assemblies (100) being movable relative to the core (40), each of the mobile assemblies (100) comprising a mobile housing (110) provided with a receiving cavity (130) for placing a reflective material; a partition (120), the partition (120) being located in the accommodating cavity (130) so as to divide the accommodating cavity (130) into a plurality of mutually independent placement cavities (131) along a circumferential direction, at least one of the placement cavities (131) being in a hollow state so as to allow neutrons of the core (40) to pass through the neutron experimental device; A driving assembly (200), wherein the driving assembly (200) is capable of driving the plurality of moving assemblies (100) to move along a preset trajectory in a direction approaching or away from the core (40); The plurality of movable assemblies (100) are spliced ​​together to surround the outside of the core (40), and are movable to cover or reveal the circumferential side surface of the core (40); The preset trajectory is set so that the plane where it is located is perpendicular to the axis of the core; The projection of the movable shell (110) on the first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core (40); The projection of the movable shell (110) on the second preset projection plane is a sector ring, and the second preset projection plane is perpendicular to the axis of the core (40).

20. The device according to claim 19, characterized in that The movable housing (110) comprises a first plate body (111) and a second plate body (112) which are arranged opposite to each other in a circumferential direction, and an angle between the first plate body (111) and the second plate body (112) is a first preset angle; The sum of the first preset angles of the plurality of moving components (100) is equal to 360°.

21. The device according to claim 20, characterized in that When the device comprises a plurality of moving components (100), the first preset angle of each moving component (100) is the same.

22. The device according to claim 20, characterized in that The projection of the partition (120) on a first preset projection plane is a rectangle, and the first preset projection plane passes through the axis of the core (40); The projections of the partition (120), the first plate body (111) and the second plate body (112) on a second preset projection plane are three line segments, the extension lines of the three line segments intersect at one point, and the second preset projection plane is perpendicular to the axis of the core (40).

23. The device according to claim 22, characterized in that The angle between the partition (120) and the first plate body (111) is a second preset angle, and the second preset angle is less than or equal to the first preset angle.

24. The device according to claim 19, characterized in that The device also includes: A detector is located in the placement cavity (131), and the position of the detector is fixed relative to the inner wall of the movable housing (110).

25. The device according to claim 24, characterized in that The detector is fixedly connected to the inner wall of the placement cavity (131) via a connecting piece.

26. The device according to claim 19, characterized in that The driving assembly (200) comprises a driving portion, a slide rail portion (210) extending along the direction of the preset track, and a moving portion (220) movable on the slide rail portion (210); The driving part, the slide rail part (210) and the moving part (220) form a set of driving devices, and the driving assembly (200) includes at least one set of driving devices; The driving part is capable of driving the moving part (220) to move along a preset track of the slide rail part (210), so as to drive the moving assembly (100) connected to the moving part (220) to move closer to or farther from the core (40); The driving device and the moving assembly (100) are arranged in a one-to-one correspondence.

27. The device according to claim 19, characterized in that The driving assembly (200) comprises a driving motor, a track extending along the preset track direction, and a rotating wheel movable along the track; The driving motor is capable of driving the rotating wheel to move along a preset track of the track, so as to drive the moving assembly (100) connected to the rotating wheel to move closer to or farther from the core (40).

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