JP3178715U - Storage box for waste containing radioactive materials - Google Patents

Abstract

The present invention provides a storage box for waste containing radioactive materials that can be opened and closed manually without using a small crane or unic car.
An input opening 56 for introducing a waste containing radioactive material into a top plate portion 50 of a precast concrete storage box 1a including a bottom plate portion 20, a peripheral wall portion 30, and a top plate portion 50; And an opening / closing lid 60 for opening and closing the charging opening. The opening / closing lid 60 includes a main body portion 61 made of a metal plate, a space for forming a radiation shielding layer made of concrete in the main body portion 61, and an injection port 63 for injecting concrete into the space. It is configured.
[Selection] Figure 1

Description

  The present invention relates to a storage facility for waste containing radioactive materials.

  The Tohoku-Pacific Ocean Earthquake that occurred on March 11, 2011, and the accompanying tsunami damaged the nuclear power generation facility at the Fukushima Daiichi Nuclear Power Station. Released outside the house and scattered around. Since then, radioactive substances have been detected one after another from sludge in sewage treatment facilities in various locations where rainwater flows.

  In general, sewage sludge discards incineration ash, uses molten slag produced by incineration at high temperature as concrete aggregate (Patent Document 1), uses dried organic matter as compost and fuel (patent) Document 2, 3). However, sewage sludge containing radioactive substances has a problem of health damage, so that the general treatment as described above is difficult. Therefore, at present, the treatment method of sewage sludge containing radioactive substances is not clear, and it is temporarily stored only by a simple curing method such as storage in a large soil bag or a sheet. However, these methods hardly expect a radiation shielding effect, and care must be taken not only during storage but also during transportation.

  In addition, as a method of storing waste such as sewage sludge so as to shield radiation, a method of covering soil with a thickness of 50 cm or more has been proposed. However, in this method, it takes time to maintain and manage the soil during long-term storage. In addition, there are problems such as treatment of leachate from waste, outflow of radioactive materials into the ground, and concerns about the appearance of residents. In addition, there is a problem that the waste may be scattered to the surroundings when the final disposal method and the destination of the waste are determined, and the excavation is performed at the time of relocation.

JP-A-6-279084 JP-A-5-155678 JP-A-9-248600

  Therefore, the present applicant is responsible for waste such as sewage sludge, soil, weeds, crops, and fishery products that contain a small amount of radioactive material generated by decontamination of local communities such as residential areas and public land such as children's parks. We have developed a storage box that can be stored safely while shielding the radiation, and can be stored for a long time if necessary.

  The storage box includes a concrete body block integrally formed with a bottom plate portion extending in the horizontal direction and a square frame-shaped peripheral wall portion standing up from an outer edge portion of the bottom plate portion, and a concrete that blocks an upper opening of the peripheral wall portion. It consists of a heaven plate block made of. And after storing a waste in the inside of a main body block, a top plate block is mounted on it and it fixes with metal fittings. This shields the radiation from the waste stored in the storage box with concrete.

  The mass of this storage box is about 5.9 t per piece, of which the mass of the main body block is about 4.6 t. For this reason, a large transport vehicle (about 10 tons) is required for transporting the main body block. Moreover, it is necessary to use a large crane having a lifting capacity of at least 15 tons for installation work for installing the main body block at a predetermined position.

  However, in public land such as residential areas and children's parks where storage boxes are installed, it is installed because the road width of the approach road is narrow and large transport vehicles and large cranes cannot enter, and the land area is small. There are areas around large places where a large crane work area cannot be secured.

  In addition, since the amount of waste generated by decontamination in the community unit is small, in order to fill the storage box, the storage box top block is opened and closed several times to add additional waste. There is a need to. However, since the top plate block of the storage box has a mass of about 1.3 t, it is difficult to manually open and close the top block, and at least a small crane or unic car must be used.

  Therefore, the primary purpose is to allow the storage box to be opened and closed manually without using a small crane or unic car, and it is possible to reduce the size without using a large transport vehicle and a large crane. The second purpose is to enable the storage box to be transported and installed by a transport vehicle and a small crane or by a UNIC vehicle.

  In order to achieve the first object, the storage box for waste containing radioactive material of [i] of the present invention is a precast concrete storage box including a bottom plate portion, a peripheral wall portion, and a top plate portion, The top plate or the peripheral wall is provided with a loading opening for loading waste containing radioactive material, and an open / close lid for opening and closing the loading opening.

  In addition, in order to achieve the same purpose, the storage box for waste containing radioactive material of [ii] of the present invention is a storage box including a bottom plate portion and a peripheral wall portion made of precast concrete and a metal top plate portion. The top plate is provided with a loading opening for loading waste containing radioactive material, and an opening / closing lid for opening and closing the loading opening.

  In the above [ii], the material and thickness of the metal top plate portion are not particularly limited, and can be determined to such an extent that it can be sufficiently shielded according to the radiation dose of the waste, for example. For example, when the radiation dose is low, it is made of a steel plate, and when the radiation dose is high, it is made of a thick steel plate, a combination of a steel plate and a concrete plate, a combination of a steel plate and a lead plate, or the like. Preferably, the metal top plate includes a radiation shielding layer made of concrete. The specific shielding performance of the open / close lid is not particularly limited, but is preferably 10 to 100% of the shielding performance of each block.

  In the above [i] and [ii], the material and thickness of the opening / closing lid are not particularly limited, and can be determined to such an extent that it can be sufficiently shielded according to the radiation dose of the waste, for example. For example, when the radiation dose is low, it is made of steel plate, and when the radiation dose is high, it is made of precast concrete, thick steel plate, a combination of steel plate and concrete plate, a combination of steel plate and lead plate, etc. is there. The specific shielding performance of the open / close lid is not particularly limited, but is preferably 10 to 100% of the shielding performance of each block.

As specific embodiments of the opening / closing lid, the following embodiments [1] to [3] are exemplified.
[1] A mode in which the open / close lid includes a radiation shielding layer made of concrete. More specifically, the opening / closing lid exemplifies a mode including a metal plate and a concrete radiation shielding layer.

[2] A mode in which the opening / closing lid includes a space for forming a radiation shielding layer made of concrete and an injection port for injecting concrete into the space. More specifically, the open / close lid includes a main body made of a metal plate, a space for forming a radiation shielding layer made of concrete in the main body, and an inlet for injecting concrete into the space. An embodiment is illustrated.

[3] A mode in which the opening / closing lid does not include a concrete radiation shielding layer or a space for forming the concrete radiation shielding layer. More specifically, the open / close lid is exemplified by a metal plate, an ALC plate, a wooden plate, or a resin plate.

  In the above aspect [3], the top plate portion is not particularly limited, but the top plate portion is provided with an opening for opening and an opening / closing lid, and the top plate portion is configured to be replaceable, and the inside of the storage box It is preferable to provide a top block made of precast concrete without an opening for opening and an opening / closing lid for replacing in place of the top plate after the sky is full. This is because it is possible to prevent radiation from being easily leaked from the opening portion for opening and the opening / closing lid portion after the filling is completed.

  The inner space of the storage box is not particularly limited, but it is preferable that a water shielding sheet is laid along the inner surface of the storage box. This is because the leachate contaminated with radioactive material can be prevented from flowing out.

  Although it does not specifically limit as a water-impervious sheet, The sheet | seat consisting of elastomers, such as sheets, such as polyethylene resin and polyvinyl chloride, and polyethylene-type elastomer, can be illustrated. Moreover, what formed the clay mineral (bentonite) which has waterproof performance and adsorption | suction performance in the sheet form can also be used as a water-impervious sheet.

  Although there is no particular limitation on the laying of the water shielding sheet, a sheet fixing tool having a heat welding material on the surface is attached to the inner wall of the box-shaped block, and the water shielding sheet is laid and welded to the heat welding material. Is preferred. This is because displacement and peeling of the water shielding sheet are prevented.

In order to achieve the second object, it is preferable to adopt the following aspect [1] or [2].
[1] The storage box is constructed by stacking at least two precast concrete blocks formed by dividing the upper and lower parts, and the mass ratio of the relatively high mass block to the relatively low mass block is 1. The aspect containing two blocks which are -2.

[2] The storage box is divided into upper and lower parts, one bottom plate block including the bottom plate portion, at least one peripheral wall block constituting only the peripheral wall portion, and one top plate including the top plate portion. A mode constructed by stacking plate blocks.

  As a method for producing such a storage box, a partition plate may be inserted into an existing mold, and the partition box may be divided as described above, or a new mold for split formation may be manufactured.

  Although the specific mass of each block is not specifically limited, It is preferable that it is 1-2t. This is because if it is 1 t or less, the division of the block becomes too fine, while if it is 2 t or more, there is a possibility that the storage box cannot be transported and installed by a small transport vehicle or a small crane.

  The size of the inner space of the storage box is not particularly limited, but the width, length, and height of the inner space are 800 to 2000 mm from the balance of the storage amount and the block mass suitable for transportation and installation. It is preferable that

  The concrete thickness of each block (hereinafter simply referred to as “member thickness”) is preferably 10 to 50 cm in view of the balance between the radiation dose attenuation performance and the block mass suitable for transportation and installation. This is because, if the distance is less than 10 cm, the radiation attenuation performance is low, whereas if it exceeds 50 cm, the radiation attenuation performance is not so high, but becomes heavy. Specifically, for example, when the thickness is 12 cm, the radiation dose can be attenuated by about 75%, when the thickness is 15 cm, the radiation dose can be attenuated by about 80%, and when the thickness is 20 cm. The radiation dose can be attenuated by about 90%, and when the thickness is 40 cm, the radiation dose can be attenuated by about 99%.

  The joint portion between the blocks is not particularly limited, but it is preferable that all gaps formed between the upper and lower blocks bend in the middle so as not to be in a straight line from the inner surface to the outer surface of the box. The radiation radiated from the waste has a property of going straight, and if the gap is in a straight line from the inner surface to the outer surface, there is a risk of leaking to the outside through the gap, but the gap is from the inner surface to the outer surface. This is because if it is bent so as not to be in a straight line, it always passes through the concrete part and attenuates.

  The connection between the blocks is not particularly limited, but it is preferable that at least two stacked blocks adjacent to each other are connected by a connection fitting. This is because two blocks can be stably connected. Furthermore, it is more preferable that all the stacked blocks are connected by a connecting metal fitting. This is because all the blocks can be stably connected.

  Although it does not specifically limit as a waste containing a radioactive substance, Sewage sludge, soil, weeds, agricultural products, fishery products, etc. can be illustrated. Among these, the state of sewage sludge is not particularly limited, and may be any of dewatered sewage sludge, incinerated ash of incinerated sewage sludge, or molten slag of incinerated sewage sludge. Further, the waste may be in a bare state, but it is preferable that the waste is put in a container such as a bag or a box from the viewpoint of ease of transfer.

  [I] According to the present invention of [ii], the top plate portion or the peripheral wall portion has the opening for opening and the opening / closing lid, so that even if the top plate portion is not opened with a small crane or a unic car, The waste can be thrown into the inside of the storage box through the opening for opening by opening the open / close lid. Therefore, a small amount of waste generated at any time can be recovered and stored efficiently.

It is a perspective view which shows the storage box of Example 1. FIG. FIG. 3 is an exploded perspective view illustrating a storage box according to the first embodiment. (A) is a top view which shows the storage box of Example 1, (b) is a front view. (A) is a plane sectional view showing the storage box of Example 1, and (b) is a front sectional view. It is a perspective view which shows the procedure which installs the storage box of Example 1 in (a)-(f). It is front sectional drawing which shows the following procedure which installs the storage box of Example 1 in (g) (h). It is a perspective view shown to (a)-(d) when the storage box of Example 1 is installed changing the number of steps. It is a perspective view which shows the storage box of Example 2. FIG. (A) is a top view which shows the storage box of Example 2, (b) is a front view. (A) is a plane sectional view showing a storage box of Example 2, and (b) is a front sectional view. (A) is front sectional drawing which shows the storage box of Example 3, (b) is front sectional drawing which shows the storage box of Example 4. FIG. (A) is front sectional drawing which shows the time of waste input before a waste becomes full in the storage box of Example 5, (b) is front sectional drawing which shows the time of waste storage after becoming full. It is. It is a perspective view which shows the storage box of Example 6. FIG.

  The waste storage box 1a containing the radioactive substance of Example 1 shown in FIGS. 1 to 7 includes a bottom plate portion 2 extending in the horizontal direction, and a square frame-shaped peripheral wall portion 3 standing up from the outer edge portion of the bottom plate portion 2. The top plate portion 5 closes the upper opening of the peripheral wall portion 3 and is divided into a bottom plate block 20, a plurality of peripheral wall blocks 30, 30 and a top plate block 50 shown below. In each block, reinforcing reinforcing bars (not shown) are embedded. Further, a water shielding sheet 40 is provided in the interior of the storage box 1a.

  The bottom slab block 20 is a square plate-like block made of precast concrete, and a rectangular frame-like peripheral wall lower portion 23 rising from an outer edge portion is provided on the upper surface thereof. At the four corners of the peripheral wall lower portion 23, connecting metal fitting screw holes 21 for screwing the tips of the connecting metal parts 11 are provided. The mass of the bottom block 20 is about 1.6 t.

  The upper surface of the peripheral wall lower portion 23 is joined to the lower surface of the lowermost peripheral wall block 30 as follows. In other words, the upper surface of the peripheral wall lower portion 23 and the lower surface of the lowermost peripheral wall block 30 are close to each other (including a contact. Due to the limit of member accuracy, a space is formed even if the contact is made). The inner edge protrusion p projecting upward along the inner edge of the peripheral wall lower portion 23 is formed along the outer edge of the lower surface of the lowermost peripheral wall block 30 so that all the gaps are not in a straight line from the inner surface to the outer surface of the peripheral wall portion 3. It joins so that it may fit inside the outer edge protrusion part q which protruded below. By this joining, even if radiation is applied to the gap between the bottom block 20 and the peripheral wall block 30, it always passes through the concrete portion and attenuates. Further, since the inner edge protrusion p of the peripheral wall lower portion 23 of the bottom block 20 protrudes upward from the outer peripheral side, the water entering the gap from the outside of the peripheral wall part 3 cannot pass the inner edge protrusion p, and the inner edge protrusion It is stopped before part p. For this reason, it is difficult for water such as rainwater to enter the interior of the storage box 1a from the gap. Further, packing (not shown) is interposed between the bottom block 20 and the peripheral wall block 30. The same applies to the joint portion between the peripheral wall blocks 30, 30 arranged in the vertical direction and the joint portion between the uppermost peripheral wall block 30 and the top plate block 50.

  Each peripheral wall block 30 is a square cylindrical block made of precast concrete, and at its four corners, connecting metal insertion holes 31 for inserting the connection metal 11 are provided. Further, the outer edge projection q described above protrudes along the outer edge at the lower end portion of each peripheral wall block 30, and the inner edge protrusion p along the inner edge at the upper end portion, like the peripheral wall lower portion 23 of the bottom block 20. Is formed. Further, a connecting fitting screwing hole 32 for screwing the tip end portion of another connecting fitting 12 is provided at the intermediate portion in the side direction of the uppermost peripheral wall block 30. The mass of each peripheral wall block 30 is about 1.4 t.

  The water-impervious sheet 40 is a sheet laid along the inner peripheral surface of the storage box 1a, and a rectangular flexible container bag 45 is placed therein. The material of the water shielding sheet 40 is not particularly limited, and examples thereof include resins such as polyethylene resin and polyvinyl chloride, and elastomers such as polyethylene elastomer. Moreover, what formed the clay mineral (bentonite) which has waterproof performance and adsorption | suction performance in the sheet form can also be used as the water-impervious sheet 40.

  The top plate block 50 is a square plate-like block made of precast concrete that closes the opening of the uppermost peripheral wall block 30, and is provided with connecting metal insertion holes 31 for inserting the connection metal 11 at the four corners. In the intermediate portion in the side direction, another connection fitting insertion hole 32 for inserting another connection fitting 12 is provided. A square opening 56 is provided in the approximate center of the top block 50. The length of one side of the charging opening 56 is not particularly limited as long as it is equal to or less than the length of one side of the inner edge of the peripheral wall block 30, but is preferably 30 to 100 cm. If it is less than 30 cm, it will be difficult to insert, and if it exceeds 100 cm, it will become larger than necessary. The mass of the top block 50 is about 1.1 t.

  In each of the blocks 20, 30, 30, 50 shown above, a plurality of peripheral wall blocks 30, 30 are stacked on the bottom plate block 20, and a top plate block 50 is stacked on the uppermost peripheral wall block 30. In this state, after the connecting fitting 11 is inserted into the connecting fitting insertion holes 51 at the four corners of the top plate block 50 and the connecting fitting insertion holes 31, 31... Of the peripheral wall blocks 30, 30, Connection is made by screwing into the attachment hole 21. In addition, for the top plate block 50 and the uppermost peripheral wall block 30, after another connection fitting 12 is inserted into another connection fitting insertion hole 52 in the middle in the side direction of the top plate block 50, The connection is strengthened by screwing into the connecting metal fitting screw holes 32 of the peripheral wall block 30.

  In the opening 56 of the top block 50, a projecting portion 65 of the opening / closing lid 60 made of a rust-proof plated steel plate that is slightly larger than the opening 56 is removably fitted into the opening 56. Thus, the charging opening 56 can be opened and closed. The opening / closing lid 60 includes a metal plate main body 61, a space S for forming a concrete radiation shielding layer 62 in the main body 61, and an inlet for injecting concrete C into the space S. 63 and handles 64 and 64 are included. A waterproof packing (not shown) is interposed between the main body portion 61 and the peripheral portion of the opening for opening 56. Further, the opening / closing lid 60 is configured such that the outer edge of the main body 61 can be screwed to the top plate block 50 with bolts 66, 66. Therefore, the open / close lid 60 can be fixed to the top block 50 with the closing opening 56 closed.

The storage box 1a of the first embodiment is installed by the following procedure.
[1] First, the storage box 1a is carried around the installation location in the form of a separate body separated into blocks 20, 30, 30, and 50, and then the bottom plate is placed at the installation location as shown in FIG. 5 (a). Place block 20.

[2] Next, as shown in FIG. 5 (b), the peripheral wall blocks 30, 30 are stacked in a necessary number of steps on the peripheral wall lower part 23 of the bottom slab block 20. The number of steps required is calculated according to the area of the installation location and the amount of waste.

[3] Next, as shown in FIG. 5 (c), a water shielding sheet 40 is installed inside the bottom plate block 20 and the peripheral wall blocks 30, 30. The water shielding sheet 40 is stretched using the sheet fixture 34. That is, an anchor (not shown) made of, for example, an internal thread embedded in a key portion of the inner surface of the peripheral wall block 30 includes a sheet fixture 34 including a metal disk and a heat welding material attached to the surface thereof. For example, it is fixed by a bolt. As the sheet fixture 34, for example, trade name “IH disk” manufactured by Akiyamade can be used. Then, the water shielding sheet 40 is welded and fixed to the heat welding material of the sheet fixture 34.

[4] Next, as shown in FIG. 5 (d), the top block 50 is overlaid on the uppermost peripheral block 30, and then the top block 50 and the peripheral wall as shown in FIG. 5 (e). The four corners of the blocks 30 and 30 and the bottom plate block 20 are connected by connecting fittings 11, 11. At the same time, the intermediate portion in the side direction between the top block 50 and the uppermost peripheral wall block 30 is connected by another connecting fitting 12, 12,.

[5] Next, as shown in FIG. 5 (f), waste is introduced from the introduction opening 56 of the top block 50. At this time, for example, wastes such as soil, weeds, agricultural crops, fish catches, etc. containing radioactive materials (preferably a weight of 30 kg or less for ease of carrying) within the community or in individual units, such as bags 8 such as sandbags, 8... Is collected and opened, and the opening / closing lid 60 is opened, and the bags 8, 8... Are put into the storage box 1 a from the opening opening 56. After the charging, the closing opening 56 is closed with the opening / closing lid 60.

[6] When the interior of the storage box 1a is full, as shown in FIG. 6G, the space S inside the metal main body 61 of the opening / closing lid 60 is opened from the inlet 63. Concrete C is poured. As a result, as shown in FIG. 6 (h), a concrete radiation shielding layer 62 is formed inside the metal main body 61 of the opening / closing lid 60. Instead of the work [6], the top block 50 may be replaced with a top plate made of precast concrete having no opening 56 for loading.

According to the storage box 1a of the first embodiment, the following effects [A] to [G] can be obtained.
[A] In a conventional storage box having a main body block in which a bottom plate portion and a peripheral wall portion are integrally formed, a large transport vehicle and a large crane are necessary for transporting and installing the main body block. In 1, the portion corresponding to the main body block is divided into the bottom block 20 and the plurality of peripheral wall blocks 30 and 30, so that each block is small and light. Therefore, even if a large transport vehicle is not used, the storage box 1a can be transported by a small transport vehicle if transported separately. Therefore, the storage box 1a can be installed even when there is only a narrow road around the installation location. Further, since each block is small and light, the storage box 1a can be installed even with a small crane or a unic car without using a large crane. Therefore, the storage box 1a can be installed even when the work area of the large crane cannot be secured around the installation location. .

[B] As shown in FIGS. 7A to 7D, the storage box 1a is changed according to the amount of contaminated waste discharged from the community by changing the assembly height (number of steps) of the peripheral wall blocks 30 and 30. The capacity of can be rearranged.

[C] In the conventional storage box without the input opening 56, it is necessary to open the top block 50 with a small crane or unic car every time waste is additionally input into the interior of the storage box 1a. In the first embodiment, since the top block 50 has the opening 56 for opening and the opening / closing lid 60, the opening / closing lid 60 is manually opened while the top block 50 remains connected to the upper end of the peripheral wall block 30. Then, the waste (bag 8) can be put into the interior of the storage box 1a from the opening 56 for filling. Therefore, a small amount of waste generated at any time can be recovered and stored efficiently.

[D] When the waste (bag 8) is filled in the storage box 1a, concrete C is poured into the space S inside the opening / closing lid 60 as shown in [6] above. Since the top plate block 50 is replaced with a top plate made of precast concrete without the input opening 56, radiation is likely to leak from the input opening 56 and the opening / closing lid 60 after it is full. Can be prevented.

[E] When the storage box 1a is full, it is also possible to open the top block 50 and collect the waste inside the storage box 1a. Long-term use is possible. Therefore, it is particularly suitable when waste is handled in the community or on an individual basis, and the radiation dose is relatively low.

[F] Since the radiation dose can be attenuated with the attenuation performance corresponding to the concrete thickness of the bottom block 20, the peripheral block 30, 30 and the top block 50, the waste (bag 8) is shielded from radiation. It can be stored safely. In addition, since the gap is bent at the adjacent locations when the blocks are joined, the radiation can be reliably shielded. Further, since the concrete bottom slab block 20, the peripheral wall blocks 30, 30 and the top plate block 50 are robust, waste containing radioactive materials can be stored for a long period of time if necessary. Moreover, since the shielding structure can be selected according to the radiation dose of the waste stored inside, it becomes an economical specification.

[G] Since the water shielding sheet 40 can be separated from the external environment in a watertight manner, leakage of leachate contaminated with radioactive materials from waste can be prevented. Moreover, since the concrete bottom slab block 20, the peripheral wall blocks 30, 30 and the top block 50 protect the water shielding sheet 40, the water shielding sheet 40 is not easily cracked even if there is an earthquake or the like, and the water shielding is maintained. The Further, since the water shielding sheet 40 is welded and fixed to the heat welding material of the sheet fixture 34, the water shielding sheet 40 is not displaced or peeled off even in the event of an earthquake or the like, and has high reliability.

  The storage box 1b of the third embodiment shown in FIGS. 8 to 10 is not provided with the opening 56 for opening and the opening / closing lid 60 in the top block 50 as compared with the storage box 1a of the first embodiment. 30, 30... Are different in that there is a loading opening 37 and an opening / closing lid 70, and the other points are the same.

  More specifically, a rectangular opening 37 is provided across the center of the front surfaces of the two peripheral wall blocks 30, 30 arranged vertically. A frame 77 formed by joining a rust-proof plated steel material in a square frame shape is attached to the edge of the input opening 37, and two opening / closing lids 70, 70 are hinged by hinges on two opposite sides of the frame 77. The closing opening 37 can be opened and closed by opening the open / close lids 70 and 70.

  Each open / close lid 70 includes a main body portion 71 made of a metal plate (rust-proof plated steel plate), a radiation shielding layer 72 in which concrete C is injected into the space in the main body portion 71, and handles 74 and 74. Has been. Both the opening / closing lids 70 and 70 can be locked with the closing opening 37 closed. Further, waterproof packing (not shown) is interposed between the frame 77 and the peripheral portion of the opening 37 and between the frame 77 and the outer edges of the opening / closing lids 70 and 70.

According to the second embodiment, the effects [A] [B] [E] [F] [G] described in the first embodiment and the following [C2] [D2] effects can be obtained.
[C2] In the conventional storage box without the input opening 37, it is necessary to open the top block 50 with a small crane or a unic car every time waste is added to the interior of the storage box 1b. In the first embodiment, since the peripheral wall block 30 has the opening 37 for opening and the open / close lids 70, 70, the open / close lid 70, which is manually connected with the top block 50 being connected to the upper end of the peripheral wall block 30. The waste (bag 8) can be thrown into the interior of the storage box 1b through the throwing opening 37 by opening 70. Therefore, a small amount of waste generated at any time can be recovered and stored efficiently.

[D2] Since the radiation shielding layers 72, 72 are provided on the opening / closing lids 70, 70, there is no fear that radiation will easily leak from the opening / closing lids 70, 70. In the second embodiment, since the opening / closing lids 70, 70 are opened forward rather than upward, the radiation shielding layers 72, 72 made of concrete are thus formed inside the opening / closing lids 70, 70, and the opening / closing lid 70 is thus formed. , 70 can also be opened manually by opening the lids 70, 70.

  The storage box 1c of the third embodiment shown in FIG. 11A is different from the storage box 1b of the second embodiment in that the bottom plate block 20 does not have the peripheral wall lower portion 23 at the outer edge, that is, the bottom plate block 20 However, it is different in that only the bottom plate portion 2 is included and the lower portion of the peripheral wall portion 3 is not included, and the other points are the same. Also in the third embodiment, the effect of [A] [B] [C2] [D2] [E] [F] [G] can be obtained as in the second embodiment.

  The storage box 1d of the fourth embodiment shown in FIG. 11 (b) is different from the storage box 1b of the second embodiment in that the top block 50 is not provided with a peripheral wall upper portion 53 protruding downward at the outer edge thereof. That is, the top plate block 50 is different in that it includes the top plate portion 5 and the upper portion of the peripheral wall portion 3, and is the same in other points. Also in the fourth embodiment, the effect of [A] [B] [C2] [D2] [E] [F] [G] can be obtained as in the second embodiment.

  The storage box 1e of the fifth embodiment shown in FIG. 12 is different from the storage box 1a of the first embodiment in that the top block 50 is made of metal instead of concrete, and the open / close lid 60 is made of concrete. After the point that neither the shielding layer 62 nor the space S for forming the layer is included and the inner space of the storage box 1e is full, the metal top block 50 is replaced with the work of [6]. It is different in that it is replaced by a precast concrete top block 50 ′ without the opening 56 for opening and the opening / closing lid 60, and the other points are the same. Also in the fifth embodiment, as in the first embodiment, the effects [A] to [G] can be obtained.

  The storage box 1f of the sixth embodiment shown in FIG. 13 is different from the storage box 1b of the second embodiment in that the bottom plate portion 2 and the peripheral wall portion 3 are integrally formed, and is the same in other points. is there. According to the sixth embodiment, the effects [C] to [G] described in the first embodiment can be obtained.

  It should be noted that the present invention is not limited to the configuration of the above-described embodiment, and can be modified and embodied as appropriate without departing from the spirit of the invention.

1a Storage box (Example 1)
1b Storage box (Example 2)
1c Storage box (Example 3)
1d Storage box (Example 4)
1e Storage box (Example 5)
1f Storage box (Example 6)
2 Bottom plate part 3 Perimeter wall part 5 Lid part 8 Bag (waste)
DESCRIPTION OF SYMBOLS 11 Connecting bracket 12 Connecting bracket 20 Bottom plate block 30 Perimeter wall block 37 Opening opening 40 Water shielding sheet 50 Lid block 56 Opening opening 60 Opening / closing lid 61 Opening / closing lid main body 62 Radiation shielding layer of opening / closing lid 63 Note of opening / closing lid Entrance 70 Opening / closing lid 71 Opening / closing lid main body 72 Radiation shielding layer of opening / closing lid

Claims (13)

  A storage box made of precast concrete including a bottom plate portion, a peripheral wall portion, and a top plate portion, and a charging opening for charging waste containing radioactive material into the top plate portion or the peripheral wall portion, and A waste storage box containing radioactive material provided with an open / close lid for opening and closing the opening.   A storage box including a bottom plate portion and a peripheral wall portion made of precast concrete, and a metal top plate portion, and a top opening portion for charging waste containing radioactive material, and for the input A waste storage box containing radioactive material provided with an open / close lid for opening and closing the opening.   3. The waste storage box containing radioactive material according to claim 2, wherein the metal top plate part includes a radiation shielding layer made of concrete.   4. The waste storage box containing radioactive material according to claim 1, wherein the opening / closing lid includes a radiation shielding layer made of concrete.   The waste storage box containing radioactive material according to claim 4, wherein the opening / closing lid includes a metal plate and a concrete radiation shielding layer.   4. A waste storage box containing radioactive material according to claim 1, wherein the open / close lid includes a space for forming a radiation shielding layer made of concrete and an inlet for injecting concrete into the space. .   The open / close lid includes a main body made of a metal plate, a space for forming a radiation shielding layer made of concrete in the main body, and an injection port for injecting concrete into the space. Storage box for waste containing substances.   The waste storage box containing a radioactive substance according to claim 1, wherein the opening / closing lid does not include a concrete radiation shielding layer or a space for forming the concrete radiation shielding layer.   The waste storage box containing radioactive material according to claim 8, wherein the opening / closing lid is formed of a metal plate, an ALC plate, a wooden plate, or a resin plate.   The top plate is provided with a loading opening and an opening / closing lid, the top plate is configured to be replaceable, and is used to replace the top plate after the storage box is full. 10. A storage box for waste containing radioactive material according to claim 8 or 9, comprising a precast concrete top plate block having no opening and an open / close lid.   The storage box of the waste containing the radioactive substance as described in any one of Claims 1-10 by which the impermeable sheet was laid along the inner surface of the storage box.   The storage box is constructed by stacking at least two precast concrete blocks formed by dividing the upper and lower sides, and the mass ratio of the relatively high mass block to the relatively low mass block is 1-2. The waste storage box containing the radioactive material according to any one of claims 1 to 11, which includes two blocks.   The storage box is divided into upper and lower parts, one bottom plate block including a bottom plate portion, at least one peripheral wall block constituting only the peripheral wall portion, and one top plate block including a top plate portion A waste storage box containing the radioactive material according to any one of claims 1 to 11, wherein the storage box is constructed by laminating the materials.

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