Pollution prevention device for radioactive waste solidification device

Abstract

The present invention provides a contamination prevention mechanism for a radioactive waste solidification device that prevents contamination of the conveyor by blocking solidified material adhering to the agitator from falling onto the conveyor during the transfer process of the agitation drum, and resolves the difficulty of removing contaminants caused by the hardening of solidified material and the problem of conveyor failure. The pollution prevention mechanism of the present invention comprises a pollution prevention plate positioned between a stirring drum, which is placed on a conveyor of a radioactive waste solidification device and stirred by a stirrer at the solidification material input and stirring position, and a rear drum that is conveyed next to the stirring drum, thereby blocking a predetermined space between the stirring drum and the rear drum in the vertical direction, and a detachment means for attaching and detaching the pollution prevention plate to the rear drum.

Description

Technology Field

[0001] The present invention relates to a contamination prevention mechanism for a radioactive waste solidification device, and more specifically, to a contamination prevention mechanism for a radioactive waste solidification device that prevents solidified material falling from a stirrer from contaminating a conveyor belt when moving a drum for stirring the next drum after stirring solidified material containing radioactive waste and a solidifying agent introduced into a drum. Background Technology

[0003] Generally, radioactive waste generated from nuclear power plants is ultimately disposed of by burying it underground, and it is necessary to ensure that it remains stably protected even after a long period of time. As a radioactive waste treatment method for this purpose, a method is known in which a solidified material containing radioactive waste and a solidifying agent is placed inside a drum to perform solidification treatment, and then the drum is sealed.

[0004] As such a solidification method, cement-based solidification has been put into practical use. Cement is a practical method because it is cheaper and easier to handle compared to other solidifying agents, and it can achieve high solidification strength.

[0005] FIG. 1 shows a radioactive waste solidification device using cement as a solidification agent. As illustrated, drums (D1, D2) move along a conveyor belt (1) in an open state, and a solidified material (W) containing radioactive waste and a solidification agent is fed by an input device not illustrated at a predetermined position on the conveyor belt (1), and then a stirrer (2) descends into the drum (D1) at the stirring position (hereinafter referred to as the 'stirring drum') to uniformly stir the solidified material (W).

[0006] When the stirring of the stirring drum (D1) by the stirrer (2) is finished, the conveyor (1) operates to transfer the stirring drum (D) to the next sealing process position, and the next drum (D2) (hereinafter referred to as the 'rear drum') is transferred thereafter to the input and stirring position, and the input and stirring process for the rear drum (D2) is performed.

[0007] At this time, as shown in FIG. 2, the operation of transferring the stirring drum (D1) after the input and stirring process is completed and transferring the next rear drum (D2) to the input and stirring process position is performed with the stirrer (2) raised to the top of the stirring drum (D1).

[0008] Therefore, during the transfer process of the stirring drum (D1), there is a problem where solidified material (W) adhering to the stirrer (2) falls onto the transfer conveyor (1) between the stirring drum (D1) and the rear drum (D2) and contaminates it.

[0009] Since the solidified material (W) is a mixture of radioactive waste and cement (solidifying agent), it can cause further radioactive contamination of the conveyor (1), and furthermore, once the solidified material (W) hardens and solidifies, it is very difficult to remove, and there is a problem of causing the conveyor (1) to malfunction. The problem to be solved

[0011] In order to solve the aforementioned conventional problems, the present invention provides a contamination prevention mechanism for a radioactive waste solidification device that prevents contamination of the conveyor by blocking solidified material adhering to the agitator from falling onto the conveyor during the transfer process of the agitation drum, and resolves the difficulty of removing contaminants caused by the hardening of the solidified material and the problem of conveyor failure. means of solving the problem

[0013] To achieve the above objective, the present invention is characterized by a contamination prevention mechanism for a radioactive waste solidification device comprising: a mixing drum placed on a conveyor of a radioactive waste solidification device and mixed by a mixer at the solidification input and mixing position, and a rear drum transferred after the mixing drum, which blocks a predetermined space between the mixing drum and the rear drum in the vertical direction; and a detachment means for attaching and detaching the contamination prevention plate to the rear drum, wherein the detachment means is integrally provided with the contamination prevention plate and is formed as a ring-shaped part capable of being hooked and maintained on the upper end of the drum, and the contamination prevention plate is provided with a support part having one end fixed to the bottom surface of the contamination prevention plate and the other end supported on the side of the rear drum.

[0014] delete

[0015] delete Effects of the invention

[0017] According to the present invention having the above-described characteristic configuration, a contamination prevention plate is provided between the stirring drum and the rear drum to be subsequently conveyed at the solid material input and stirring position of the conveyor, thereby preventing solid material adhering to the stirrer from falling onto the conveyor during the process of transferring to the next process after the stirring process on the stirring drum is completed, and thus the conveyor has the effect of preventing contamination and malfunction.

[0018] In addition, according to the present invention, the contamination prevention plate can be quickly and conveniently attached to the rear drum by means of a detachable means comprising a ring-shaped part that is easy to hang on the top of the drum, thereby providing the effect of being very convenient to use.

[0019] In addition, according to the present invention, since the support member provided on the contamination prevention plate is supported on the side of the rear drum, the contamination prevention plate can be installed in a stable horizontal state without shaking. Brief explanation of the drawing

[0021] FIG. 1 is a front view showing the usage state of a conventional radioactive waste solidification device. FIG. 2 is a front view showing the contamination process of a conventional radioactive waste solidification device. FIG. 3 is a front view of a radioactive waste solidification device showing the installation state of a pollution prevention mechanism according to the present invention. FIG. 4 is a plan view showing the installation state of a pollution prevention mechanism according to the present invention. FIG. 5 is a perspective view showing a pollution prevention mechanism according to the present invention. FIGS. 6 and 7 are front views of a radioactive waste solidification device showing the usage state of the pollution prevention mechanism according to the present invention. Specific details for implementing the invention

[0022] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. FIG. 3 shows the installation state of a contamination prevention device for radioactive waste according to the present invention. The contamination prevention device (10) of the present invention is installed between a stirring drum (D1) placed on a conveyor (1) of a radioactive waste solidification device and stirred by a stirrer (2) at the solidification input and stirring position, and a rear drum (D2) that is conveyed next to the stirring drum (D1).

[0023] As illustrated in FIGS. 4 and 5, the contamination prevention mechanism (10) comprises a contamination prevention plate (11) positioned between the stirring drum (D1) and the rear drum (D2) to block a predetermined space between the stirring drum (D1) and the rear drum (D2) in the vertical direction, and a detachment means for attaching and detaching the contamination prevention plate (11) to the rear drum (D2).

[0024] It is preferable that the anti-contamination plate (11) be made of metal or synthetic resin with relatively high structural strength.

[0025] The attachment / detachment means is preferably formed by a ring-shaped part (12) that can be secured at the top of the rear drum (D2), and in this case, the ring-shaped part (12) can be formed integrally by extending one side of the contamination prevention plate (11).

[0026] Additionally, the contamination prevention plate (11) further comprises a support member (13) that is supported on the side of the rear drum (D2). The support member (13) can be configured such that one end is fixed to the bottom surface of the contamination prevention plate (11) and the other end is supported on the side of the rear drum (D2).

[0027] In this embodiment, two ring-shaped parts (12) are formed and one support part (13) is formed in the center, but this is not limited thereto. If the width of the support part (13) is increased or two support parts (13) are formed, only one ring-shaped part (12) may be formed in the center.

[0028] The operation of the present invention, which is configured as such, is described as follows. As shown in FIG. 3, the pollution prevention mechanism (10) of the present invention can be installed by an operator on the stirring drum (D1) and the rear drum (D2) when the stirring drum (D1) is in the position for solidifying and stirring.

[0029] That is, the pollution prevention plate (11) of the pollution prevention device (10) can be positioned horizontally between the stirring drum (D1) and the rear drum (D2), and at the same time, the ring-shaped part (12) can be secured to the top of the rear drum (D2), allowing for very quick and convenient installation.

[0030] In addition, at the same time as the installation of the pollution prevention device (10), the support member (13) provided at the bottom of the pollution prevention plate (11) is supported on the side of the rear drum (D2), so the pollution prevention plate (11) of the pollution prevention device (10) can be installed stably without shaking while maintaining it horizontally.

[0031] In this manner, with the pollution prevention device (10) installed, a solidified material (W) containing radioactive waste and a solidifying agent is introduced into the stirring drum (D1), and is uniformly stirred by the stirrer (2). When stirring is finished, the stirrer (2) rises upward as shown in FIG. 6, the stirring drum (D1) is transferred to the sealing process position, which is the next process, and the rear drum (D2) is transferred to the solidified material introduction and stirring position.

[0032] During this process, the solidified material (W) attached to the mixer falls downward, but falls onto the contamination prevention plate (11) of the contamination prevention mechanism (10) installed between the mixing drum (D1) and the rear drum (D2), so the conveyor (1) can be prevented from being contaminated.

[0033] Next, as shown in FIG. 7, when the stirring drum (D1) is moved to a sealing process position (not shown) and sealed, and then removed from the transfer conveyor (1), the operator can remove the contamination prevention device (10) from the rear drum (D2) located at the solid material input and stirring position.

[0034] At this time, if the amount of solidified material (W) adhering to the contamination prevention plate (11) is small, the contamination prevention device (10) may be installed as is on the rear drum (D3) to be transferred next, and if the amount of solidified material (W) adhering to the contamination prevention plate (11) is large, it may be washed and the contamination prevention device (10) installed on the rear drum (D3) to be transferred next. In this way, the contamination prevention device (10) can be used repeatedly.

[0035] Optimal embodiments have been disclosed in the drawings and specification as described above. Specific terms have been used herein, but they are used only for the purpose of describing the invention and are not intended to limit the meaning or the scope of the invention as described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0037] 1 : Transfer conveyor 2 : Agitator 10 : Pollution Prevention Zone 11 : Pollution Prevention Panel 12: Ring-shaped part 13: Support part D1, D2, D3 : Drum W : Solidified material

Claims

Claim 1 A contamination prevention device for a radioactive waste solidification device, comprising: a contamination prevention plate positioned between a stirring drum placed on a conveyor of a waste solidification device and stirred by a stirrer at a solidification material input and stirring position, and a rear drum conveyed after the stirring drum, which blocks a predetermined space between the stirring drum and the rear drum in the vertical direction; and a detachment means for attaching and detaching the contamination prevention plate to the rear drum, wherein the detachment means is integrally provided with the contamination prevention plate and is formed as a ring-shaped part capable of being hooked and maintained on the top of the drum, and the contamination prevention plate is provided with a support part having one end fixed to the bottom surface of the contamination prevention plate and the other end supported on the side of the rear drum. Claim 2 delete Claim 3 delete

Images