JP6027337B2 - Radioactive waste container - Google Patents

Description

  The present invention relates to a radioactive waste container, and more particularly, to a radioactive waste container having durability and high radiation shielding performance.

  Currently, a large amount of flexible containers are used to store decontaminated topsoil that is contaminated with radioactive materials, for example, waste from decontamination of the ground.

  However, the durability of flexible containers is about 3 years, and long-term durability cannot be expected.

  Further, a container for disposal of radioactive waste as disclosed in Patent Document 1 is known as one having durability.

  In this container, the container main body and the container lid are made of a strong material so that the work for disposal of the geological layer can be easily performed, and the radioactive waste can be disposed of in a stable state.

Japanese Patent Laid-Open No. 9-68593

  In such a container, although the container is formed of a strength member to improve durability, it is not assumed that a large amount of high-level radioactive material is generated, so that radiation shielding performance is not so much. I can't expect it.

  In addition, no consideration is given to the storage of large amounts of radioactive waste.

  Furthermore, in order to store a large amount of radioactive waste, it is necessary to follow the procedures of temporary storage, intermediate storage, and final disposal for the purpose of securing the site, but no consideration is given to movement for that purpose.

  An object of the present invention is to provide a radioactive waste container that can sufficiently shield against radiation of a high level of radioactive material.

  Another object of the present invention is to provide a radioactive waste container that can load and store a large amount of radioactive waste.

  Still another object of the present invention is to provide a radioactive waste container that can be easily moved in accordance with procedures of temporary storage, intermediate storage, and final disposal.

(1) In order to achieve the above object, a radioactive waste container according to the present invention has a radioactive waste container having a container body made of reinforced concrete having an opening at the top and a container lid covering the opening of the container body. a container, not covered by plate material made of the inner surface of the side wall of at least the container main body from a material having a high shielding performance of the radiation,
The container body is connected in a horizontal direction via a connection fitting with the container lid attached, and the upper container body can be restricted in movement in the horizontal direction with respect to the lower container body. It can be loaded on the
The container lid has a recess in which the coupling fitting is disposed at four corner positions on the upper surface of the container lid, and a bolt insertion hole that penetrates the container lid at the position of the recess.
The container body has a screw hole at a position corresponding to the bolt insertion hole with the container lid attached.
The connection fitting has a horizontal connection portion of a metal plate provided with a plurality of bolt holes, and a horizontal movement restriction portion erected upward from the horizontal connection portion,
The bolt hole of the horizontal connecting portion disposed in the concave portion of the container lid and the concave portion of the container lid of the radioactive waste container adjacent to the container main body with the container lid attached to the container main body. The bolt is inserted into the screw hole and screwed into the screw hole of the container body adjacent to the screw hole and connected in the horizontal direction, and the container lid and the container body can be fixed.
When another radioactive waste container is loaded on the container lid, the horizontal movement restricting portion stands above the upper surface of the container lid and along the corner of the upper container body, The container main body is characterized in that the movement can be restricted in a horizontal direction with respect to the container main body on the lower side .

According to the present invention, the container body is made of reinforced concrete, and at least the side wall inner surface of the container body is covered with a plate made of a material having high radiation shielding performance. The plate material having a high shielding performance can be sufficiently shielded against a high level of radioactive material radiation.
In addition, by adopting such a configuration, it is possible to easily carry and load and store a large amount of radioactive waste by performing connection in the horizontal direction and restriction of movement of the upper side container main body with the connection fitting. Can be easily performed.

(2) In the present invention, in (1), the inner surface of the container lid may be covered with a plate material made of a material having high radiation shielding performance.

  By adopting such a configuration, the container lid is also provided with a plate made of a material having a high radiation shielding performance, so that it can sufficiently shield even higher levels of radioactive material radiation. Can do.

( 3 ) In the present invention, in (1) or (2) , the container lid or the container main body may be provided with a screw hole for lifting.

  By adopting such a configuration, the radioactive waste container can be easily moved according to the procedures of temporary placement, intermediate storage, and final disposal by lifting the container body using the lifting screw holes. It becomes.

It is sectional drawing of the radioactive waste storage container concerning one embodiment of this invention. It is an enlarged view of the side wall part of FIG. It is a side view which shows the state which piled up the radioactive waste storage container of FIG. 1 in multiple stages. It is a top view of the connector which connects a radioactive waste storage container in a horizontal direction. It is a top view of the coupling tool which performs steadying of an upper radioactive waste storage container, connecting a radioactive waste storage container in a horizontal direction. It is a side view of the coupling tool of FIG. It is a top view of the connector which connects the radioactive waste storage container of an end part site. It is sectional drawing which shows the modification of a radioactive waste storage container. (A) The left side is a partially enlarged sectional view of the vent hole in FIG. 8, the right side is a right side view thereof, (B) the left side is a partially enlarged sectional view of the drain hole in FIG. 8, and the right side is a right side view thereof. It is sectional drawing which shows the temporary placement state of the radioactive waste storage container in a place with few sites. It is sectional drawing which shows the state which applied the radioactive waste storage container to the temporary storage or the intermediate storage facility. It is sectional drawing which shows the temporary storage state when there is no storage place of the radioactive waste decontaminated before construction, such as a building. It is sectional drawing which shows the state which utilizes a radioactive waste storage container as a radioactive waste collection box. The radioactive waste storage container concerning other embodiment of this invention is shown, (A) is a longitudinal cross-sectional view of a radioactive waste storage container, (B) is the X section partial enlarged view of (A). . It is explanatory drawing which shows the state from temporary placement of the radioactive waste using the radioactive waste storage container of FIG. 14 to final disposal. (A) is a front view which shows an example which piles up a container main body and a container lid in multiple steps, (B) is the top view. (A) is a front view which shows the other example which piles up a container main body and a container lid in multiple steps, (B) is the top view. It is a side view which shows the state which moves a radioactive waste storage container using a pallet hanger or a forklift. It is a side view which shows the state which moves a radioactive waste storage container using a sling belt. (A) is sectional drawing which shows the state which connects adjacent container main bodies with a connection metal fitting, (B) is the Y section partial enlarged plan view. It is sectional drawing which shows the state which connects the several adjacent container main body with a wire.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-13 is a figure which shows the radioactive waste storage container concerning one embodiment of this invention.

  FIG. 1 is a cross-sectional view showing a radioactive waste container according to the present embodiment, and this radioactive waste container 10 has a container body 12 and a container lid 14.

  The container body 12 is made of reinforced concrete having an opening 16 at the top.

  Moreover, the container main body 12 is made into the state which covered the inner surface of the four side walls 18 with the board | plate material 20 which consists of material with a high radiation shielding performance.

  As the plate material 20 made of a material having high radiation shielding performance, for example, a barium sulfate fine aggregate heavy concrete 22 having glass fiber reinforced concrete decorative layers 24 applied on both sides thereof is employed.

  In addition, as the plate member 20, heavy concrete using heavy aggregates such as barite and blast furnace slag, a lead plate, or the like can be adopted.

  When this container body 12 is manufactured, a part of the formwork is omitted by assembling the plate material 20 as a formwork, further assembling the formwork on the outside, and placing concrete between them to place concrete. Is possible.

  In this way, the container body 12 is made of reinforced concrete, and at least the inner surface of the side wall 18 of the container body 12 is covered with the plate material 20 made of a material having a high radiation shielding performance, thereby ensuring the strength of the container body 12 and The plate member 20 made of a material having a high shielding performance can be sufficiently shielded against high-level radioactive material radiation.

  The container lid 14 covers the opening 16 of the container main body 12 and is made of reinforced concrete like the container main body 12.

  Further, the inner surface of the container lid 14 is also covered with a plate material 20 made of a material having a high radiation shielding performance, similar to the container main body 12, so that it can sufficiently shield against radiation of a higher level of radioactive material. It is supposed to be.

  As shown in FIG. 3, the radioactive waste container 10 can be arranged in parallel and in multiple stages on a crushed stone, ground, or leveled concrete 26.

  For example, when a plurality of radioactive waste containers 10 are arranged in the horizontal direction, they are connected in the horizontal direction by using a connection fitting 28 as shown in FIG.

  The connection fitting 28 is made of a rectangular metal plate, and is provided with bolt holes (not shown) at the four corner positions thereof, so that the bolts 32 can be inserted.

The container lid 14 of each radioactive waste container 10 is formed with a recess 34 so that the head of the bolt 32 does not protrude at the four corner positions, and a bolt insertion hole 30 (see FIG. 6) is provided at the position of the recess 34. The container body 12 at the position corresponding to the bolt insertion hole 30 is provided with a screw hole 36 for the bolt 32 (see FIG. 6).

  Then, in the horizontal direction, with the corners of the four radioactive waste containers 10 aligned, the connection fitting 28 is installed in the recess 34, the bolt 32 is inserted into the bolt hole of the connection tool 28, and the bolt of the container lid 14 is inserted. The hole 30 is penetrated and connected by screwing into the screw hole 36 of the container body.

  Further, when the radioactive waste container 10 is stacked in multiple stages, the upper side container body 12 is placed horizontally with respect to the lower side container body 12 and the container lid 14 by using the connection fitting 38 shown in FIGS. The movement can be restricted in the direction.

  The connecting fitting 38 has a horizontal connecting portion 40 having the same configuration as the connecting fitting 28, and a horizontal erected in a cross shape along the corners of the four container bodies 12 on the upper side from the horizontal connecting portion 40. And a direction movement restricting portion 42.

  Therefore, by connecting the radioactive waste container 10 in the horizontal direction and restricting the movement of the upper radioactive waste container 10 in the horizontal direction by the connecting bracket 38, it is possible to easily perform multi-stage loading and storage. This makes it possible to easily store a large amount of radioactive waste, and contributes to the saving of storage land.

  Further, the screw hole 36 provided in the container body 12 is also used as a screw hole for lifting the radioactive waste container 10, and by lifting the radioactive waste container 10 using the screw hole 36 for lifting, The radioactive waste container 10 can be easily moved according to the procedures of temporary placement, intermediate storage, and final disposal.

  Further, at the end position of the radioactive waste storage container 10 stacked in multiple stages, the radioactive waste storage container 10 is connected in the horizontal direction and the upper side radioactive waste storage container 10 by a connecting metal fitting 44 as shown in FIG. The horizontal movement is restricted.

  The connecting bracket 44 has a shape in which the horizontal connecting bracket 38 is vertically halved, and includes a horizontal connecting portion 46 corresponding to a corner portion of two radioactive waste storage containers 10 arranged side by side, and the horizontal connecting portion. 46 and a horizontal movement restricting portion 48 erected in a T shape along the corners of the two container main bodies 12 on the upper side.

  Thus, by connecting with the connection metal fittings 28, 38, and 44, the radioactive waste container 10 stacked in multiple stages is prevented from collapsing due to an earthquake or the like.

  In addition, when radioactive waste containers 10 are loaded and stored in multiple stages, information on the contents, degree of contamination, location of occurrence, storage date and time, etc. of each radioactive waste container 10 is recorded in an IC tag embedded in concrete. It is good to do.

  In this case, since the IC tag cannot read data from a distance, for example, a metal plate having a different color or shape can be sandwiched between the radioactive waste containers 10 according to the degree of contamination and contents, and can be identified from a distance. It is good to do so.

  8 and 9 show a modification of the radioactive waste container 10.

  As shown in FIG. 8, the radioactive waste container 10 is provided with a gas vent hole 50 in the upper part of the container body 12 and a water drain hole 52 in the lower part.

  In the case of radioactive waste with a lot of organic matter, the gas vent hole 50 is used to discharge the gas out of the container. As shown in FIG. Is provided with a filter 54.

  When the radioactive waste container 10 is used above the groundwater level, the drain hole 52 may penetrate rainwater due to rain or the like, and if water stays for a long time, the radioactive material comes into contact with the radioactive waste. Since there is a possibility of elution, water is to be discharged quickly. As shown in FIG. 9B, a filter 56 is provided in the drain hole 52.

  10 to 13 show an example of the radioactive waste container 10.

  FIG. 10 shows a temporary storage state in a place where there is little land. The radioactive waste container 10 is arranged side by side in the horizontal direction and is loaded in multiple stages to save the land.

  FIG. 11 shows a state applied to a temporary storage site or an intermediate storage facility. Bentonite mixed soil 60 is laid on the ground 58, a crushed stone drainage layer 72 is laid thereon, and the radioactive waste container 10 is placed thereon. Horizontally arranged and stacked in multiple stages, covered with locally generated soil 62 or purchased sand from above, covered with bentonite mixed soil 60 or sheet, and further covered with locally generated soil 62 To cover.

  Further, this facility is provided with a rainwater collecting / draining groove 64 and a groundwater monitoring well 66.

  FIG. 12 shows a state where there is no storage place for radioactive waste decontaminated before construction of a factory or building in a contaminated area. The radioactive waste is accommodated in the radioactive waste container 10 and is parked. It is buried in the ground of 68 etc., and when the intermediate storage facility etc. where the pollutant is picked up later is prepared, the radioactive waste container 10 is dug out and moved.

  Fig. 13 shows the state of use as a radioactive waste collection box after decontamination. If additional contaminants are found even after decontamination, it will be difficult to dispose of it, so a lid that can be opened at a town hall or public facility. A radioactive waste container 10 with 70 is arranged so that radioactive waste can be received at any time.

  FIGS. 14-21 is a figure which shows the radioactive waste storage container concerning other embodiment of this invention.

  FIG. 14 shows a radioactive waste container according to the present embodiment, in which (A) is a longitudinal sectional view thereof, and (B) is an enlarged view of a portion X in (A).

  The radioactive waste container 80 has a container body 82 and a container lid 84.

  The container body 82 is made of reinforced concrete having an opening 16 in the upper part.

  The container body 82 has an inner diameter and a depth of about 1,110 mm and a thickness of about 120 mm.

  The container lid 84 covers the opening 16 of the container main body 82, and is made of reinforced concrete like the container main body 82.

  The thickness of the container lid 84 is about 120 mm, similar to the container body 82.

  The container main body 82 and the container lid 84 are connected by bolts 32 at four corners.

  Moreover, in this Embodiment, it has the some uneven | corrugated | grooved part 86a, 86b which can be engaged with the lower surface of the container main body 82, and the upper surface of the container lid 84, and is for conveyance between the two uneven | corrugated parts 86a, 86b engaged at least. The gap 88 (see FIGS. 16A, 17A, and 21) is provided.

  In this way, by engaging the plurality of concave and convex portions 86 formed on the lower surface of the container main body 82 and the upper surface of the container lid 84, the container main body 82 is stacked as shown in FIG. 16, FIG. 17, FIG. The container body 82 can be positioned in the horizontal direction easily and reliably, and the pallet hanger shown in FIG. 18 or the fork of the forklift shown in the conveyance gap 88 formed between the two concavo-convex parts 86a and 86b. A sling belt 92 shown in FIG. 90 or FIG. 19 is inserted so that it can be easily moved from the storage location.

  Further, in the present embodiment, at least the outer surface of the side wall 18 of the container main body 82 and the outer surface of the container lid 84 are covered with a plate material 94 made of a material having high radiation shielding performance.

  In this way, the container body 82 and the container lid 84 are made of reinforced concrete, and at least the outer side wall of the container body 82 and the outer surface of the container lid 84 are covered with a plate material made of a material having high radiation shielding performance. In addition to ensuring the strength, the plate member 92 having a high radiation shielding performance can be sufficiently shielded against high-level radioactive material radiation.

  As the plate member 94 made of a material having high radiation shielding performance, for example, as shown in FIG. 1B, a barium sulfate fine aggregate heavy concrete 22 having glass fiber reinforced concrete decorative layers 24 applied on both sides thereof is used. Adopted.

  In addition, as the plate member 94, heavy concrete using a heavy aggregate such as barite or blast furnace slag, a lead plate, or the like can be adopted.

  The plate member 94 made of a material having a high radiation shielding performance is assembled and formed in advance as a shielding box 96 that covers at least the outer surface of the side wall 18 of the container body 82 and the outer surface of the container lid 84. Can be removed.

  Specifically, the shielding box 96 has a shielding performance for four pieces of radiation having a height corresponding to the height of the side wall 18 of the container body 82 and the height of the container lid 84 by the width of the side wall 18 of the container body 82. The plate material made of a high material and the plate material made of a material having a large area corresponding to the upper surface of the container lid 84 and having a high radiation shielding performance are connected by angle members 98 respectively.

  In the present embodiment, the shielding box 96 is provided with a screw hole 100 for lifting, and a shielding box made of a plate material having high radiation shielding performance by attaching a lifting jig 102 to the screw hole 100. The body 96 can be easily moved, attached and detached.

  FIG. 15 shows a state from temporary placement of radioactive waste using such a radioactive waste container 80 to final disposal.

  First, for example, radioactive waste 104 such as incinerated ash of combustible material generated by decontamination is accommodated in the container main body 82, the opening is closed by the container lid 84, and a shielding box is provided on the container main body 82 and the container lid 84. 96 is put on and covers the outer surface of the side wall of the container body 82 and the outer surface of the container lid 84 so as to shield the radiation.

  In this case, as shown in FIG. 14A, the shielding box 96 can be easily attached by attaching the lifting jig 102 to the screw hole 100 formed on the upper surface of the shielding box 96 and lifting it with a crane or the like.

  Next, the container main body 82 containing the radioactive waste 104 is moved and transported to the temporary storage place 106 with the shielding box 96 attached thereto, and the container main body 82 containing the radioactive waste 104 is temporarily transferred to the temporary storage place 106. Put.

  In this case, when temporarily placing the temporary storage place 106, the temporary storage place 96 is temporarily removed with the shield box 96 removed.

  Since temporary placement in the temporary storage place 106 is in a piled-up state, a temporary enclosure 108 is provided around.

  Next, after temporarily placing in the temporary storage place 106 for a predetermined period, the container body 82 containing the radioactive waste 104 is stored in the intermediate storage facility 110 by being moved and transported to the intermediate storage facility 110.

  The container body 82 is moved and transported from the temporary storage place 106 to the intermediate storage facility 110 with the shielding box 96 attached, and the intermediate storage facility 110 stores the container body 82 with the shielding box 96 removed.

  The intermediate storage facility 110 is substantially the same as that shown in FIG.

  Next, after being stored in the intermediate storage facility 110 for a predetermined period, the container body 82 containing the radioactive waste 104 is buried in the final disposal site 112 by being moved and transported to the final disposal site 112.

  The container main body 82 is moved and transported from the intermediate storage facility 110 to the final disposal site 112 with the shielding box 96 attached, and the final disposal site 112 is embedded with the shielding box 96 removed.

  In this way, radioactive waste 104 such as incinerated ash of combustible material generated by decontamination is accommodated in the container main body 82, the container lid 84 is provided, and a shielding box made of a plate material having high radiation shielding performance thereon. 96 is transported to the temporary storage site 106, the intermediate storage facility 110 or the final disposal site 112 in a state of being covered with 96, and in these temporary storage site 106, the intermediate storage facility 110 or the final disposal site 112, a shielding box made of a plate material having high radiation shielding performance By removing the body 96, the use of a member having a high material cost is reduced to reduce the cost.

  Further, in the temporary storage place 106, the intermediate storage facility 110, and the final disposal site 112, it is difficult to secure a sufficient site. Therefore, it is necessary to stack the container main bodies 82 with the openings closed with the container lid 84 in multiple stages. The site is reduced, and the form of stacking is shown in FIGS. 16 and 17.

  In FIG. 16, as shown in the front view of (A) and the plan view of (B), the upper and lower containers are disposed via the concave and convex portions 86 a and 86 b formed on the lower surface of the container body 82 and the upper surface of the container lid 84, respectively. The main body 82 is stacked in a staggered manner.

  Specifically, the concavo-convex portion 86a on the container body 82 side includes a central wide convex portion, two concave portions having the same width as the central wide convex portion on both sides thereof, and a wide width continuous to the two concave portions. The convex part 86b on the container lid 84 side has the same width as that of the central wide concave part and the central wide concave part on both sides thereof. The two convex portions having the two convex portions and the two concave portions having a width approximately half of the wide concave portion connected to the two convex portions are provided in parallel.

  Then, between the two concave portions on the end side of the adjacent container lid 84 located on the lower side, the central convex portion on the container body 82 side located on the upper side is engaged, and the wide convex portions on the both end sides are engaged. Is engaged with the concave portion at the center of the container lid 84.

  In FIG. 17, as shown in the front view of (A) and the plan view of (B), the upper and lower containers are disposed via the concave and convex portions 86 a and 86 b formed on the lower surface of the container main body 82 and the upper surface of the container lid 84. The body 82 is stacked with its joints aligned.

  In this case, the concave portion at the center of the container lid 84 and the convex portion at the center of the container main body 82 are stacked so as to engage with each other.

  Further, in the present embodiment, when the container main body 82 is stacked and stored as described above, the stacked state is stabilized by using the connecting means of the container main body 82 as shown in FIGS. ing.

  In FIG. 20, as shown in the cross-sectional view of FIG. 20A and the enlarged plan view of FIG.

  Two long holes 116 are formed in the connection fitting 114, and the bolt 32 is fixed by inserting the bolt 32 that connects the container lid 84 and the container main body 82 into the long hole 116. Connection between each other is also possible.

  In FIG. 21, the wire body 118 is wound around the outer periphery of the stacked container body 82 to restrain the container body 82.

  In this case, the wire 118 is fixed to the wire fixing bracket 120 fastened together by the bolt 32.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the embodiment shown in FIGS. 1 to 13, a plate made of a material having a high radiation shielding property is provided only on the side wall portion of the container body of the radioactive waste container. However, the present invention is not limited to this example. Further, a plate made of a material having a high shielding property may also be provided at the bottom.

  In the embodiment shown in FIGS. 1 to 13, the lifting screw hole is provided in the container body. However, the present invention is not limited to this example and may be provided in the container lid.

10, 80 Radioactive waste container 12, 82 Container body 14, 84 Container lid 16 Opening portion 18 Side wall 20, 94 Plate members 28, 38, 44, 114 connecting brackets 36, 100 made of a material having high radiation shielding properties Screw holes 40, 48 Horizontal direction connecting part 42, 48 Horizontal direction movement restricting part 96 Shielding box 104 Radial waste

Claims (3)

A radioactive waste container having a container body made of reinforced concrete having an opening at the top, and a container lid covering the opening of the container body,
The inner surface of the side wall of at least the container main body has covering at plate made of a material having high shielding performance of the radiation,
The container body is connected in a horizontal direction via a connection fitting with the container lid attached, and the upper container body can be restricted in movement in the horizontal direction with respect to the lower container body. It can be loaded on the
The container lid has a recess in which the coupling fitting is disposed at four corner positions on the upper surface of the container lid, and a bolt insertion hole that penetrates the container lid at the position of the recess.
The container body has a screw hole at a position corresponding to the bolt insertion hole with the container lid attached.
The connection fitting has a horizontal connection portion of a metal plate provided with a plurality of bolt holes, and a horizontal movement restriction portion erected upward from the horizontal connection portion,
The bolt hole of the horizontal connecting portion disposed in the concave portion of the container lid and the concave portion of the container lid of the radioactive waste container adjacent to the container main body with the container lid attached to the container main body. The bolt is inserted into the screw hole and screwed into the screw hole of the container body adjacent to the screw hole and connected in the horizontal direction, and the container lid and the container body can be fixed.
When another radioactive waste container is loaded on the container lid, the horizontal movement restricting portion stands above the upper surface of the container lid and along the corner of the upper container body, The radioactive waste container is characterized in that the container main body can be restricted in movement in the horizontal direction with respect to the lower container main body . In claim 1,
A radioactive waste container, wherein an inner surface of the container lid is covered with a plate made of a material having high radiation shielding performance. In claim 1 or 2 ,
The radioactive waste container according to claim 1, wherein the container lid or the container body is provided with a screw hole for lifting.