KR102164503B1 - Intergrated form type cover for radioactive waste disposal container - Google Patents

Abstract

The present invention relates to a cover for a radioactive waste disposal container. Specifically, a mold for pouring concrete is manufactured of a steel plate when manufacturing the cover for the disposal container, a connection clamp is welded to a bottom of the mold, and then a rebar is placed in the connection clamp. After the rebar is placed in the connection clamp, the concrete is poured to manufacture the mold integrated type cover so as to allow the rebar and the steel plate to withstand a load caused by gravity, thereby removing a central deflection phenomenon. Moreover, a lower portion is composed of the steel plate to reduce the thickness of the cover since structural stability is higher than structural stability of an existing cover so as to reduce a lifting phenomenon of the cover due to expansion of a drum, thereby, accordingly, preventing an occurrence of collapse when stacking the disposal container in advance.

Description

Cover for radioactive waste disposal container with integrated form {INTERGRATED FORM TYPE COVER FOR RADIOACTIVE WASTE DISPOSAL CONTAINER}

The present invention relates to a lid for a container for disposing of radioactive waste, and the details are as follows. When manufacturing a disposal container cover, a formwork for pouring concrete is made of steel plate, and a connection clamp is welded to the bottom of the formwork. After that, reinforcing bars are placed on the connecting clamp, and then concrete is poured to form an integral cover, so that the reinforcing bar and the steel plate hold up the load due to gravity, and the deflection of the center of the cover is eliminated. In addition, the present invention can reduce the thickness of the cover because the lower portion is composed of a steel plate, so that the structural stability is higher than that of the existing cover, thereby reducing the lifting of the cover due to the expansion of the drum, and thus collapse occurs when the disposal container is stacked and disposed. It relates to a formwork-integrated radioactive waste disposal container cover to prevent in advance.

Radioactive waste is waste from nuclear facilities, workshops or laboratories dealing with radioactive materials, and is classified into medium and low level radioactive waste and high level radioactive waste according to the degree of contamination with radioactive materials. The definition of radioactive waste is a radioactive material or a material contaminated by it, and is stipulated in relevant laws and regulations. Contaminated work supplies during maintenance and repair generated in nuclear power plants, contaminated products during treatment in hospitals, and non-destructive testing in industries. In addition, high-level radioactive waste includes nuclear fuel remaining after generating electricity from a nuclear power plant. In other words, radioactive waste is generated in all fields that use nuclear power, such as schools, hospitals, research institutes, industries, and nuclear power.

In the case of the disposal method of medium and low level radioactive waste, it is disposed within several hundred meters below ground in consideration of topographic characteristics. Near Surface Disposal is a method of embedding concrete structures on the ground surface, and Rock Cavern Disposal is buried inside by excavating tunnels/silos in an underground rock mass of at least tens to hundreds of meters. This is how to dispose of it. In the case of high-level radioactive waste, deep geological disposal is carried out in rock mass within 500 to 1,000 m underground.

Disposal methods of low- and medium-level radioactive waste vary from country to country, and are determined in combination with public sentiment, economic feasibility, constructability, and safety. When a disposal facility is exposed to the air, shielding is necessary to attenuate and block radiation existing inside the disposal facility, and it is necessary to improve the shielding structure to reduce the exposure dose of terrorism, residents, and to consider public sentiment.

These radioactive wastes are placed in a disposal container of a concrete structure having a rectangular shape according to the standard and placed inside the disposal facility.

As an example of such a disposal container, a radioactive waste disposal container, which is Korean Patent No. 10-1618826, is disclosed.

The radioactive waste disposal container is divided into a container part 100 and a lid part 200 as shown in FIGS. 1 to 4, and the container part 100 may be formed as a circular or polygonal container opened to the top. , It is formed in a square tube, and the lid part 200 is inserted into the upper end of the open container part 100 to close it.

At least three lid support jaws 110 protrude from the inner side so that the lid portion 200 inserted into the top of the container portion 100 can be supported at a certain height, and the lid support jaws 110 are uniform in plan view. It is formed protruding from the inner side to a height excluding the thickness of the lid part 200 from the bottom of the inside of the angle point.

At this time, the lid support jaw 110 is formed in a horizontal haunch structure having a chamfered shape for each of the inner four corners of the square cylinder, as shown in Figs. 2 and 3, in the case of the container part 100 of the square cylinder. It is preferable that the lid support jaw 110 protrudes at least strongly, because the inner side mold portion 310 for forming the inner side of the container portion 100 in the mold portion for the container portion to be described later is the lid support jaw ( 110) is divided based on the point where it is formed, and must be moved sequentially or crosswise to the center of the mold for the container part to facilitate the demolding of the cured container part 100, but the inner side mold part 310 is divided into two. In the case of loss, it is because the inner side mold part 310 divided in two is very difficult to move to the center of the mold part for the container part.

In addition, the container part 100 has a plurality of protruding portions 120 and recessed portions 130 for stacking corresponding to each other at the top and bottom of the same position on the plane to facilitate stacking during use, as shown in FIG. As described above, in the case of the container part 100 of a square cylinder, it is preferable that each side of the container part 100 is formed at the upper and lower ends of the center, and the concave portion 130 for stacking and the protruding part for stacking ( 120) may be formed by a concave-shaped formwork and a protruding formwork when forming the container part 100.

As described above, the lid part 200 is seated on the lid support jaw 110 so as to be inserted into the upper end of the container part 100, the same as or slightly smaller than the inner circumferential surface of the container part 100. 100) It is formed at a height that does not protrude to the top.

And the lid portion 200, as shown in Figures 1 and 3, to facilitate lifting, while a plurality of locking portions 210 for lifting the lid are formed on the top surface, the lid lifting auxiliary locking portion 220 is also An oblique guide groove 230 corresponding to the concave portion 130 for lamination of the container portion 100 is formed to facilitate the lamination of the radioactive waste disposal container 1, and the lid portion ( The insert edge protector 240 made of a metal material may be configured to prevent damage to the edge portion of the 200).

However, since the lid part of such a conventional radioactive waste disposal container, that is, the lid is manufactured using only concrete and the central reinforcement, there is a problem that the center of the cover is struck during long-term storage, and the tolerance of the drum itself (10 mm ), drums of more than standard size are generated due to drum expansion due to gas generation after disposal, which causes the lid to be lifted, and the lid lifted phenomenon has a problem that may cause collapse during stacking disposal of the disposal container. In particular, the disposal container is loaded in 26 layers in the cave disposal facility, and the loading of the 26-layer disposal container is tilted due to the lifting of the cover, and if the degree is severe, a serious problem may occur. Damage to containers and spillage of radioactive materials cause significant time and cost consuming to restore the disposal facility.

In addition, the cover of such a conventional radioactive waste disposal container is made of reinforced concrete, and the reinforcement spacing of the reinforcing bars is designed to be very tight in order to secure sufficient strength of the cover. Since the dense reinforcement spacing limits the choice of aggregate standard, there is a problem in that structural safety is lowered due to this.

Domestic registered patent No. 10-1618826

The present invention is to solve the above problems, when manufacturing a disposal container cover, a formwork for pouring concrete is made of a steel plate, a connection clamp is welded to the bottom of the formed formwork, and then rebar is placed on the connection clamp to pour concrete. do. It is an object of the present invention to provide a cover for a form-integrated radioactive waste disposal container in which the central sagging phenomenon of the reinforcing bar and the steel plate to withstand the load by gravity by producing such an integral cover is eliminated.

In addition, in the present invention, since the lower part is composed of a steel plate, the structural stability is higher than that of the existing cover, so that the thickness of the cover can be reduced, thereby reducing the lifting of the cover due to the deformation of the drum. There is an additional purpose to provide a cover for a radioactive waste disposal container in a formwork that prevents it from occurring.

In addition, in the present invention, it is possible to manufacture a disposal cover only by pouring concrete by welding the main/auxiliary lifting rings together when the formwork is manufactured, and since the concrete demoulding process is omitted, the cover manufacturing process can be shortened. This can reduce the cost of manufacturing and maintenance by relatively lowering the rate of damage to the container cover due to demolding, and by welding and fixing the formwork and the connecting clamp, it is possible to prevent the concrete and the floor plate from being separated by the load of the floor plate during lifting. Another object is to provide a lid for a waste disposal container.

Features of the present invention for achieving the above object,

A formwork made of a rectangular shape of a steel plate material so that concrete is poured and integrated therein, and a vertical partition wall is fixedly installed on the upper edge; A connection clamp welded to the upper surface of the formwork; A reinforcing bar network reinforced to the formwork by the connection clamp; A main lifting ring that is welded and fixed in four directions from the center of the upper surface of the formwork at a position where there is no interference with the reinforcing bar network; And a sub-lifting ring that is an upper surface of the formwork at a position not interfering with the reinforcing bar network, and is welded and fixed in the same line with an edge from the outside of the main lifting ring.

Here, a plurality of connection clamps are disposed at equal intervals on the upper edge of the formwork so as not to interfere with the main lifting ring and the sub lifting ring.

Here, also, the reinforcing bar mesh is manufactured in one step by crossing vertical and horizontal reinforcing bars.

Here, the main lifting ring is manufactured in the form of a square box with an open upper surface, a first body having a locking protrusion on an upper surface, and a plurality of first fixing bolt holes on a lower surface; The upper end is fastened to the first fixing bolt hole of the first body by a nut, and the bottom is formed of a plurality of first vertical bolts welded and fixed to the upper surface of the formwork.

Here, the sub-lifting ring is manufactured in the form of a square box with an open upper surface, a lifting rod is provided at an inner central portion, and a second body having a second fixing bolt hole at the bottom surface; The upper end is fastened to the second fixing bolt hole of the second body by a nut, and the bottom is made of a second vertical bolt to which at least one is welded and fixed to the upper surface of the formwork.

According to the present inventor's formwork-integrated radioactive waste disposal container cover configured as described above, when manufacturing the disposal container cover, a formwork for pouring concrete is made of steel plate, a connection clamp is welded to the bottom of the formed formwork, and then reinforced to the connection clamp. The formwork-integrated cover in which the concrete is then poured can be made to eliminate the central deflection caused by gravity because the rebar and the steel plate hold the load.

In addition, according to the present invention, since the lower part is composed of a steel plate, the structural stability is higher than that of the existing cover, so that the thickness of the cover can be reduced, thereby reducing the lifting of the cover due to the expansion of the drum. This can be prevented from occurring.

In addition, according to the present invention, it is possible to manufacture a disposal cover only by pouring concrete by welding the main/auxiliary lifting rings together when making a formwork, so that the concrete demoulding process is omitted, so that the cover production process can be shortened, and the container cover is damaged due to demoulding. Manufacturing and maintenance costs can be reduced by relatively lowering the rate, and by welding and fixing the formwork and connection clamp, it is possible to prevent the concrete and the floor plate from being separated due to the load of the floor plate during lifting.

1 to 4 are views showing the configuration of a conventional radioactive waste disposal container.
5 is a perspective view showing the configuration of a formwork-integrated radioactive waste disposal container cover according to the present invention.
6 is an exploded perspective view of FIG. 5.
7 is a partial cross-sectional view taken along AA of FIG. 5.
8 is a cross-sectional view of a portion BB of FIG. 4.
9 is an explanatory diagram for explaining the prevention of the sagging phenomenon of the lid for the form-integrated radioactive waste disposal container according to the present invention.
10 is an explanatory view for explaining the prevention of lifting of the lid for a form-integrated radioactive waste disposal container according to the present invention.

Hereinafter, a configuration of a cover for a form-integrated radioactive waste disposal container according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

Figure 5 is a perspective view showing the configuration of a formwork-integrated radioactive waste disposal container cover according to the present invention, Figure 6 is an exploded perspective view of Figure 5, Figure 7 is a partial cross-sectional view AA of Figure 5, Figure 8 is BB of Figure 4 It is a partial cross-sectional view.

5 to 8, a formwork-integrated radioactive waste disposal container cover (1) according to the present invention includes a formwork (10), a connection clamp (20), a reinforcing rod (30), and a main lifting ring (40). ) And a sub lifting ring (50).

First, the formwork 10 is made of a steel material in a square shape so that the concrete (C) is poured and integrated therein, and a vertical partition wall 11 is fixedly installed on the upper edge. At this time, the overall height of the formwork 10 is preferably manufactured to be less than 3/2 of the height of the existing formwork, and it is preferable to use an aggregate having a particle size of 10 mm or more in concrete for strength reinforcement.

In addition, the connection clamp 20 is welded and fixed to the upper surface of the formwork 10 made of a steel material. At this time, the connection clamp 20 is a clip type fixed to the scaffold pipe, which is a conventional structure, and a plurality of the upper edge of the formwork 10 so as to be non-interference with the main lifting ring 40 and the sub lifting ring 50 They are arranged at equal intervals.

In addition, the reinforcing bar network 30 is fixed to the connection clamp 20 and laid inside the formwork (central height), using an aggregate having a relatively large particle size, and using vertical and horizontal reinforcing bars to reduce the height of the cover. It is preferable to cross it in a lattice form and make it in one stage.

Subsequently, the main lifting ring 40 is welded and fixed in four directions from the center of the upper surface of the formwork 10 at a position where there is no interference with the reinforcing bar network 30, and the upper surface is fixed at the same height as the formwork 10.

At this time, the main lifting ring 40 is composed of a first body 41 and a first vertical bolt 45, the first body 41 is made of a steel material in the form of a square box with an open upper surface, A locking protrusion 42 is provided on the upper surface, a plurality of first fixing bolt holes 43 are provided on the bottom surface, and the first vertical bolt 45 is made of a steel material to fix the first of the first body 41 The upper end is fastened to the bolt hole 41b by a nut, and a plurality of bottoms are welded and fixed to the upper surface of the formwork 10.

Subsequently, the sub-lifting ring 50 is the upper surface of the formwork 10 at a position where it does not interfere with the reinforcing bar network 30, and is welded and fixed in the same line with the edge from the outside of the main lifting ring 40, and the upper surface is the formwork. It is fixed at the same height as (10).

At this time, the sub-lifting ring 50 is composed of a second body 51 and a second vertical bolt 55, and the second body 51 is made of a steel material in the shape of a square box with an open upper surface, A lifting rod 52 made of a steel material is provided in the inner central part, a second fixing bolt hole 53 is provided on the bottom surface, and the second vertical bolt 55 is made of a steel material. 2 The upper end is fastened to the fixing bolt hole 53 by a nut, and the bottom surface is welded and fixed to the upper surface of the formwork 10.

Hereinafter, the manufacturing process and operation of the lid for a form-integrated radioactive waste disposal container according to the present invention will be described in detail with reference to the accompanying drawings.

First, each connection clamp 20 is welded to the design position on the upper surface of the formwork 10 to vertically fix each connection clamp 20.

Then, the first vertical bolt 45 of the main lifting ring 40 and the second vertical bolt 55 of the sub lifting ring 50 are welded to the design position of the formwork 10 and fixed vertically.

Then, the pre-fabricated reinforcing bar network 30 is mounted on the connection clamp 20, and then the reinforcing bar network 30 is fixed with the connection clamp 20.

When the fixing of the reinforcing bar network 30 is completed, the first body 41 of the main lifting hook 40 and the second body 51 of the sub lifting hook 50 are moved to the first vertical of the main lifting hook 40. The bolt 45 and the second vertical bolt 55 of the sub lifting ring 50 are fastened and fixed.

Subsequently, concrete (C) is poured into the formwork 10 and then cured to complete the production. At this time, the tape to prevent the concrete (C) from flowing into the inside of the first body 41 of the main lifting ring 40 and the second body 51 of the sub lifting ring 50 when pouring concrete (C). Seal the inside with a lamp.

When the curing is completed, the locking jaws 42 provided on the first body 41 of the four main lifting hooks 40 and the lifting rod provided in the second body 51 of the four sub lifting hooks 50 ( 52) and store it in the loading space. At this time, it is possible to prevent the cover itself from being rotated due to the main lifting ring 40 and the sub lifting ring 50 located diagonally to the main lifting ring 40 and the lifting load being concentrated in the center.

On the other hand, the form-integrated radioactive waste disposal container cover 1 according to the present invention prevents the central sagging or lifting phenomenon, as shown in FIGS. 9 and 10, which will be described in more detail as follows.

9 is an explanatory view for explaining the prevention of the sagging phenomenon of the lid for a form-integrated radioactive waste disposal container according to the present invention, and FIG. 10 is for explaining the prevention of lifting of the lid for a form-integrated radioactive waste disposal container according to the present invention It is an explanatory diagram.

As shown in (a) of FIG. 9, since the cover of the conventional radioactive waste disposal container is manufactured using only concrete and a central reinforcement, the central portion of the cover is struck during long-term storage.

On the other hand, in the formwork-integrated radioactive waste disposal container cover 1 according to the present invention, the formwork is made of a steel plate as shown in (b) of FIG. 9, and a connection clamp is welded to the bottom of the formwork, and then the connection clamp After reinforcing reinforcing bars in the wall, concrete is poured to form an integral cover to prevent the occurrence of central deflection as the reinforcing bar and the steel plate withstand the load by gravity.

In addition, as shown in (a) of FIG. 10, since the cover of the conventional radioactive waste disposal container has a relatively thick cover, if a drum exceeds the standard due to the tolerance (10 mm) of the drum itself and the deformation of the drum, , It comes into contact with the cover, and this causes the cover to be lifted.

On the other hand, the cover 1 for the form-integrated radioactive waste disposal container according to the present invention is manufactured to have a relatively thin thickness of the cover as shown in FIG. Even if a drum that exceeds the standard is generated due to the tolerance (10mm) of the drum and deformation of the drum, it does not come into contact with the cover, which prevents the cover from being lifted.

The present invention may be variously modified and may take various forms, and in the detailed description of the present invention, only specific embodiments thereof have been described. However, it should be understood that the present invention is not limited to a particular form mentioned in the detailed description, but rather, it is understood to include all modifications, equivalents, and substitutes within the spirit and scope of the present invention as defined by the appended claims. Should be.

10: formwork 20: connection clamp
30: reinforcing bar 40: main lifting hook
50: sub lifting ring

Claims (5)

A formwork made of a rectangular shape of a steel plate material so that concrete is poured and integrated therein, and a vertical partition wall is fixedly installed on the upper edge;
A connection clamp welded to the upper surface of the formwork;
A reinforcing bar network intersecting vertical reinforcing bars and horizontal reinforcing bars to be fabricated in a single stage and reinforced to the formwork by the connection clamp;
A main lifting ring which is welded and fixed in four directions from the center of the upper surface of the formwork at a position where the reinforcing bar mesh is not interfered with, and the upper surface is fixed to the same height as the formwork; And
It is an upper surface of the formwork at a position not interfering with the reinforcing bar network, and is welded and fixed in the same line as the edge from the outside of the main lifting ring, and the upper surface includes a sub lifting ring fixed to the same height as the formwork,
The connection clamp,
A plurality of the main lifting ring and the sub lifting ring are arranged at equal intervals on the upper edge of the formwork so as to be non-interference,
The main lifting ring,
A first body manufactured in the form of a rectangular box with an upper surface partially open, a locking protrusion provided at one side of the upper surface, and a plurality of first fixing bolt holes provided at the lower surface;
The upper end is fastened by a nut to the first fixing bolt hole of the first body, and the bottom surface is made of a plurality of first vertical bolts welded and fixed to the upper surface of the formwork,
The sub lifting ring,
A second body manufactured in the shape of a square box with an open upper surface, a lifting rod provided at an inner central part, and a second fixing bolt hole provided at a lower surface;
A form-integrated radioactive waste disposal container, characterized in that the upper end is fastened by a nut to the second fixing bolt hole of the second body, and the bottom surface is formed of a second vertical bolt welded and fixed to at least one upper surface of the formwork. Dragon cover. delete delete delete delete

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