A storage device for high level radioactive waste targets

Abstract

The utility model relates to medical equipment technical field, concretely relates to a kind of storage device of high radioactive waste target;Including pedestal, universal self-locking wheel, target piece bearing frame, left side storage cover, right side storage cover, moving assembly, limiting component and locking assembly, locking assembly includes oilless bushing, handle presser plate, handle lock pin, handle bolt pin and blocking limit pin, the main material of pedestal, left side storage cover and right side storage cover is pure lead and thickness is enough, play the gamma ray induced radioactivity of shielding waste target piece, staff can be close after device closure, and be carried to special radio cooling space by means of universal self-locking wheel, simultaneously, the application adopts local replacement design, only need to replace waste target piece instead of integral target station, save material cost and hoisting expense, further can avoid the high cost of integral replacement neutron target station, optimize resource utilization by local replacement waste target piece, reduce equipment downtime and maintenance expenditure, with better economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a storage device for high-radioactive waste targets. Background Technology

[0002] Boron neutron capture therapy (BNCT) is a binary, targeted, cellular-level precision radiotherapy modality based on neutron capture reactions, combining the advantages of both "biological targeting" and "heavy ion radiotherapy." The core component of this treatment device is the neutron target station, a device used to generate neutrons. Specifically, a proton beam of a certain energy in the upstream beam tube bombards a target within the neutron target station. The target typically consists of a copper base and a thin lithium plating layer. Protons react with Li⁻⁷ in the lithium plating layer to produce neutrons. A water-cooled microchannel is usually installed within the copper base, through which deionized water carries away the heat generated by the protons bombarding the target. Neutron target stations can be classified as fixed targets and rotating targets.

[0003] In existing boron neutron capture therapy devices for tumor treatment, there are two main pathways for the generation of defective targets: 1. Defective targets are generated when the device reaches its performance limit during normal operation. After a fixed period of proton bombardment, the amount of Li-7 material available for nuclear reactions decreases. When the Li-7 material becomes insufficient to produce a sufficient neutron flux for clinical use, the target becomes a defective target. 2. During operation, individual differences in the target can cause abnormalities such as melting or peeling of the lithium plating layer, radiation damage, and bubble formation, leading to a significant reduction in the neutron yield generated by proton bombardment. These defective targets need to be replaced with new targets for the neutron therapy device to continue to be used. After prolonged proton irradiation, the following nuclear reactions occur on the defective target: 7 Li(p,n) 7 Be, the product 7 Be is radioactive and emits gamma rays. With the accumulation of irradiation time, the target sheet has a high dose of induced radioactivity. If manual replacement is used, maintenance personnel need to wear heavy radiation protection clothing. Not only is the maintenance work cumbersome and inefficient, but it also poses a serious risk to the health of the workers.

[0004] The main existing technical solution is to hoist the neutron target station out of the equipment room as a whole and replace it with a new neutron target station. This solution has problems such as large volume of radioactive waste, troublesome transportation and storage, long maintenance cycle, and expensive target replacement. Utility Model Content

[0005] The purpose of this invention is to provide a storage device for high-radioactivity waste targets, which can avoid the high cost of replacing the entire neutron target station, optimize resource utilization by partially replacing waste target pieces, reduce equipment downtime and maintenance expenses, and has better economic benefits.

[0006] To achieve the above objectives, this utility model provides a storage device for high-radioactive waste targets, including a base, a plurality of universal self-locking wheels installed at the bottom of the base, a target sheet support frame installed on the upper side of the base, and waste target sheets placed on the target sheet support frame;

[0007] The base is also equipped with a left storage cover and a right storage cover via a movable component;

[0008] The left storage cover and the right storage cover are limited to each other by limiting components on both sides, and are connected and assembled by locking components on the top.

[0009] The locking assembly includes an oil-free bushing, a handle pressure plate, a handle locking pin, a handle bolt, and a blocking pin. The oil-free bushing and the handle pressure plate are respectively fixed on the left storage cover and the right storage cover. The handle locking pin and the handle bolt are nested in the oil-free bushing, and the blocking pin is installed at the bottom of the handle bolt.

[0010] The base, the left storage cover, and the right storage cover are all made of pure lead.

[0011] The moving component includes a linear guide rail and a slider. The linear guide rail is detachably connected to the base and is symmetrically arranged. The slider can slide linearly on the linear guide rail and is connected to the bottom connecting parts of the left storage cover and the right storage cover respectively by bolts.

[0012] The limiting component includes a blocking plate and a buffer pad. Multiple blocking plates are detached and installed on the base and arranged symmetrically in pairs. The buffer pads are adhered and fixed to the blocking plates and are respectively close to the left storage cover and the right storage cover.

[0013] The linear guide rail can be extended in length by splicing it in a straight line.

[0014] The top ends of both the handle locking pin and the handle bolt pin are provided with handle portions.

[0015] This utility model discloses a storage device for high-radioactivity waste targets. When in use, the base, left storage cover, and right storage cover are all made of pure lead with sufficient thickness to shield against gamma-ray induced radioactivity from the waste target sheets. After the device is closed, personnel can approach it and transport it to a dedicated radiation cooling space using the universal self-locking wheels at the bottom. Furthermore, this application employs a partial replacement design, requiring only the replacement of the waste target sheets rather than the entire target station, saving material and hoisting costs, thereby significantly reducing operating costs. This avoids the high cost of replacing the entire neutron target station. By partially replacing the waste target sheets, resource utilization is optimized, equipment downtime and maintenance expenses are reduced, resulting in better economic benefits. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of the storage device for high-radioactive waste targets of this utility model.

[0018] Figure 2 This is a schematic diagram of the target support frame of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the rotating handle locking pin and the left storage cover of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the screw pin of this utility model and the right storage cover.

[0021] Figure 5 This is a schematic diagram of the screw locking pin of this utility model.

[0022] Figure 6 This invention uses Monte Carlo simulation to calculate the gamma dose distribution map of the height section.

[0023] Figure 7 This invention uses Monte Carlo simulation to calculate the γ dose distribution map of a horizontal cross section.

[0024] In the diagram: 101-Base, 102-Universal self-locking wheel, 103-Target plate support frame, 104-Scrap target plate, 105-Left storage cover, 106-Right storage cover, 107-Oil-free bushing, 108-Handle pressure plate, 109-Handle locking pin, 110-Handle bolt pin, 111-Blocking limit pin, 112-Linear guide rail, 113-Slider, 114-Blocking plate, 115-Buffer pad. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] like Figures 1 to 5 As shown, where Figure 1 This is a schematic diagram of the overall structure of the storage device for high-radioactive waste targets. Figure 2 This is a structural schematic diagram of the target support frame 103. Figure 3 This is a schematic diagram of the structure of the locking pin 109 of the rotary handle engaging with the left storage cover 105. Figure 4 This is a schematic diagram of the structure of the screw pin 110 and the right storage cover 106. Figure 5 This is a schematic diagram of the structure of the handle locking pin 109. This utility model provides a storage device for high-radioactivity waste targets: it includes a base 101, a universal self-locking wheel 102, a target support frame 103, a left storage cover 105, a right storage cover 106, a moving component, a limiting component, and a locking component. The locking component includes an oil-free bushing 107, a handle pressure plate 108, a handle locking pin 109, a handle bolt pin 110, and a blocking limiting pin 111. The moving component includes a linear guide rail 112 and a slider 113. The limiting component includes a blocking plate 114 and a buffer pad 115. This solution avoids the high cost of replacing the entire neutron target station. By partially replacing the waste target pieces 104, resource utilization is optimized, reducing equipment downtime and maintenance costs, resulting in better economic benefits. It is understood that the aforementioned solution can optimize resource utilization and reduce equipment downtime and maintenance costs through partial replacement of the waste target pieces 104, thus achieving better economic benefits.

[0027] In this embodiment, a plurality of universal self-locking wheels 102 are installed at the bottom of the base 101. The universal self-locking wheels 102 are used for direct movement of the device.

[0028] The base 101 is equipped with a target support frame 103, on which waste target pieces 104 are placed. The bottom end of the target support frame 103 is fixed to the base 101 by bolts and is provided with a placement structure to facilitate the symmetrical placement of the waste target pieces 104.

[0029] A left storage cover 105 and a right storage cover 106 are also installed on the base 101 via a movable component; the left storage cover 105 and the right storage cover 106 cooperate with the base 101 to form a protective lead room structure.

[0030] The left storage cover 105 and the right storage cover 106 are limited by limiting components on both sides to keep them apart when they are far apart, and are connected and assembled by a locking component at the top. The limiting components are used to buffer and protect the left storage cover 105 and the right storage cover 106 when they are far apart to their maximum position. The locking component is used to protect the left storage cover 105 and the right storage cover 106 when they are close together and fit together. At this time, the inner sides of the left storage cover 105 and the right storage cover 106 respectively abut against the two outer sides of the target support frame 103. After the locking component is installed, there is a safe distance between it and the top side of the target support frame 103 to ensure smooth locking and unlocking.

[0031] The oil-free bushing 107 and the handle pressure plate 108 are respectively fixed to the left storage cover 105 and the right storage cover 106. The handle locking pin 109 and the handle bolt pin 110 are nested in the oil-free bushing 107. The blocking limit pin 111 is installed at the bottom of the handle bolt pin 110. When the device is in the initial open position: the handle locking pin 109 is in the retracted latch and hidden in the storage cavity of the left storage cover 105, and the flat opening structure at the bottom of the handle bolt pin 110 faces the storage cavity. When the device is in the closed position: the handle locking pin 109 is in the extended latch and embedded in the mating cavity of the right storage cover 106 that aligns with the storage cavity, and the flat opening structure at the bottom of the handle bolt pin 110 faces the handle locking pin 109. At this time, the entire device is in a closed and locked state, and the entire device cannot be opened without external force. The attitude change of the handle locking pin 109 and the handle bolt pin 110 only requires the application of a certain torque externally. The left storage cover 105 and the right storage cover 106 are respectively provided with stepped holes vertically to facilitate the installation and positioning of the oil-free bushing 107. The top of the oil-free bushing 107 is fixed to the handle pressure plate 108 by bolts for positioning.

[0032] The base 101, the left storage cover 105, and the right storage cover 106 are all made of pure lead. The thickness of these components is designed to ensure good protective performance.

[0033] Secondly, the linear guide rail 112 is detachably connected to the base 101 and symmetrically arranged; the slider 113 can slide linearly on the linear guide rail 112 and is connected to the bottom connecting parts of the left storage cover 105 and the right storage cover 106 respectively by bolts. The linear guide rail 112 is fixed by countersunk bolts, and multiple sliders 113 are arranged on a single linear guide rail 112. The sliders 113 are connected to the connecting parts at the bottom of the left storage cover 105 and the right storage cover 106 respectively by bolts. The sliding structure of the linear guide rail 112 and the slider 113 is consistent with the guide rail slider structure at the bottom of the X-axis worktable of the existing vertical CNC machining center, which is used to ensure the stability of sliding.

[0034] Then, multiple baffles 114 are detached and installed on the base 101, arranged symmetrically in pairs; buffer pads 115 are bonded and fixed to the baffles 114, respectively close to the left storage cover 105 and the right storage cover 106. The baffles 114 are fixed to the base 101 by bolts, and the buffer pads 115 are used to buffer contact when the left storage cover 105 and the right storage cover 106 are at their maximum distance from each other.

[0035] Furthermore, the linear guide rail 112 can be extended in length by using a one-piece splicing method. This structure facilitates increasing the sliding stroke and can be set according to the length of the device, ensuring that the slider 113 slides stably in a straight line, which is convenient for moving the left storage cover 105 and the right storage cover 106 closer to each other and further apart.

[0036] Finally, both the top ends of the handle locking pin 109 and the handle bolt pin 110 are provided with handle portions. This structure facilitates the rotation of the corresponding components. The arc-shaped locking tongue structure on the handle locking pin 109 can actually be made into a split structure. First, a square mounting groove is made to prevent the upper handle from rotating relative to the locking tongue, and then the bottom is fixed with a countersunk screw. The blocking and limiting pin 111 on the handle bolt pin 110 is used to limit its rotation after it comes into contact with the inner wall of the cavity of the storage cover on that side.

[0037] When using the storage device for high-radioactivity waste targets of this utility model, the main body material of the base 101, the left storage cover 105, and the right storage cover 106 is pure lead with sufficient thickness, which can shield the gamma-ray induced radioactivity of the waste target sheet 104. After the device is closed, the staff can approach the device and use the universal self-locking wheels 102 at the bottom of the device to transport it to the dedicated radiation cooling space. At the same time, this application adopts a partial replacement design, which only requires the replacement of the waste target sheet 104 instead of the entire target station, saving material costs and hoisting costs, thereby greatly reducing the cost of use. When replacing the target sheet, the good target sheet can be transported directly through this device. Then, the waste target sheet is placed directly inside the device during replacement, and can be transported directly through this device afterward. This avoids the high cost of replacing the entire neutron target station. By partially replacing the waste target sheet 104, resource utilization is optimized, equipment downtime and maintenance expenses are reduced, and better economic benefits are achieved.

[0038] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A storage device for high-level radioactive waste targets, comprising a base, wherein a plurality of omnidirectional self-locking wheels are mounted on the bottom of the base, characterized in that: A target support frame is installed on the upper side of the base, and waste target pieces are placed on the target support frame. The base is also equipped with a left storage cover and a right storage cover via a movable component; The left storage cover and the right storage cover are limited to each other by limiting components on both sides, and are connected and assembled by locking components on the top. The locking assembly includes an oil-free bushing, a handle pressure plate, a handle locking pin, a handle bolt, and a blocking pin. The oil-free bushing and the handle pressure plate are respectively fixed on the left storage cover and the right storage cover. The handle locking pin and the handle bolt are nested in the oil-free bushing, and the blocking pin is installed at the bottom of the handle bolt. The base, the left storage cover, and the right storage cover are all made of pure lead.

2. The storage device for high-radioactivity waste targets as described in claim 1, characterized in that: The moving component includes a linear guide rail and a slider. The linear guide rail is detachably connected to the base and is symmetrically arranged. The slider can slide linearly on the linear guide rail and is connected to the bottom connecting parts of the left storage cover and the right storage cover respectively by bolts.

3. The storage device for high-radioactivity waste targets as described in claim 1, characterized in that: The limiting component includes a blocking plate and a buffer pad. Multiple blocking plates are detached and installed on the base and arranged symmetrically in pairs. The buffer pads are glued and fixed to the blocking plates and are respectively close to the left storage cover and the right storage cover.

4. The storage device for high-radioactivity waste targets as described in claim 2, characterized in that: The linear guide rail can be extended in length by splicing it in a straight line.

5. The storage device for high-radioactivity waste targets as described in claim 1, characterized in that... : Both the top end of the handle locking pin and the handle bolt pin are provided with a handle portion.

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