Radioactive waste treatment containers and methods

Abstract

To provide a radioactive waste processing container and a method for processing a radioactive waste which can improve the efficiency of a drying work of a radioactive waste.SOLUTION: The present invention includes: a cylindrical outer cylinder having an upper opening part and a closed lower part; an inner cylinder which forms a first gas flow passage between the inner cylinder and the outer cylinder by having an upper opening part, forming a porous cylindrical shape, and being arranged in the inside of the outer cylinder; a cylindrical member which forms a second gas flow passage inside by forming a porous cylindrical shape and being arranged in the inside of the inner cylinder; a lid for closing the upper opening part of the outer cylinder and the upper opening part of the inner cylinder; a first communication unit communicated with the outside and the first gas flow passage; and a second communication unit communicated with the outside and the second gas flow passage.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a radioactive waste processing container and method.

Background Art

[0002] In a nuclear power plant, when core fuel disposed inside a reactor pressure vessel melts, structures inside the reactor containment vessel also melt and solidify, becoming debris as radioactive waste. Therefore, it is necessary to recover radioactive waste such as debris from the reactor containment vessel and process it. As a technique for processing radioactive waste, for example, there is one described in Patent Document 1. The technique described in Patent Document 1 accommodates radioactive waste in a canister, and heats the canister with a heater disposed outside the canister, thereby drying the radioactive waste inside.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When radioactive waste is accommodated in a canister and the canister is heated from the outside to dry the radioactive waste inside, the heat of the heater is less likely to be transmitted to the radioactive waste inside the canister, leading to the problem that the drying operation takes a long time.

[0005] The present disclosure solves the above-described problem, and aims to provide a radioactive waste processing container and method that improve the efficiency of the drying operation for radioactive waste.

Means for Solving the Problems

[0006] To achieve the above objective, the radioactive waste processing container of this disclosure comprises: an outer cylinder having an upper opening and a closed lower end; an inner cylinder having an upper opening and a porous cylindrical shape, and positioned inside the outer cylinder to form a first gas flow path between itself and the outer cylinder; a cylindrical member having a porous cylindrical shape and positioned inside the inner cylinder to form a second gas flow path inside itself; a lid that closes the upper opening of the outer cylinder and the upper opening of the inner cylinder; a first communication section that connects the outside to the first gas flow path; and a second communication section that connects the outside to the second gas flow path.

[0007] Furthermore, the radioactive waste treatment method of the present disclosure is a treatment container in which a porous cylindrical inner cylinder is arranged inside an outer cylinder whose lower part is closed, a porous cylindrical cylindrical member is arranged inside the inner cylinder, and the upper opening of the inner cylinder and the upper opening of the outer cylinder can be opened and closed by a lid, the method comprising the steps of: placing radioactive waste inside through the upper opening of the inner cylinder; closing the upper opening of the outer cylinder and the upper opening of the inner cylinder with the lid; supplying drying gas to a second gas flow path inside the cylindrical member; and discharging gas from a first gas flow path provided between the outer cylinder and the inner cylinder to the outside. [Effects of the Invention]

[0008] The radioactive waste treatment container and method described herein can improve the efficiency of drying radioactive waste. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram representing a radioactive waste processing container according to the first embodiment. [Figure 2] Figure 2 is an exploded view of a radioactive waste processing container. [Figure 3] Figure 3 is a flowchart illustrating the radioactive waste processing method according to the first embodiment. [Figure 4] Figure 4 is a schematic diagram illustrating the drying process in the processing container. [Figure 5]Figure 5 is a schematic diagram showing a radioactive waste processing container according to the second embodiment. [Modes for carrying out the invention]

[0010] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. However, these embodiments do not limit the present disclosure, and where there are multiple embodiments, they may be combinations of these embodiments. Furthermore, the components in the embodiments include those readily conceivable by those skilled in the art, those that are substantially identical, and those that are equivalent.

[0011] [First Embodiment] <Containers for processing radioactive waste> Figure 1 is a schematic diagram representing the radioactive waste treatment container of the first embodiment, and Figure 2 is an exploded view representing the radioactive waste treatment container.

[0012] In nuclear power plants, when the reactor core and other components inside the reactor vessel melt, molten material such as molten fuel is generated, and this solidified molten material (debris) is subject to recovery as radioactive waste. The radioactive waste processing container and method of this embodiment, for example, recovers and stores radioactive waste generated at a nuclear power plant and dries it. However, the radioactive waste is not limited to debris, but may also include spent fuel or structures generated during decommissioning.

[0013] As shown in Figures 1 and 2, the radioactive waste processing container 10 comprises an outer cylinder 11, an inner cylinder 12, a cylindrical member 13, and a lid 14.

[0014] The outer cylinder 11 is cylindrical in shape, with an open top and a closed bottom. The outer cylinder 11 comprises an outer cylinder body 21, a bottom 22, an upper opening 23, a flange portion 24, and a guide cylinder 25. The outer cylinder body 21 is cylindrical, but may also be rectangular in shape. The bottom 22 is disc-shaped according to the shape of the outer cylinder body 21 and is integrally provided at the lower part of the outer cylinder body 21. The upper opening 23 is provided at the upper end of the outer cylinder body 21 and allows air to flow between the inside and outside of the outer cylinder body 21. The flange portion 24 is ring-shaped and is integrally provided on the outside of the upper end of the outer cylinder body 21. The guide cylinder 25 is a porous cylindrical shape and is erected at the center of the bottom 22 inside the outer cylinder body 21. That is, the vertical length of the guide cylinder 25 is approximately the same as the vertical length of the outer cylinder body 21, and its lower end is integrally connected to the bottom 22. In this case, the lower end of the guide tube 25 is closed by the bottom 22. The guide tube 25 is made of perforated metal or the like, which has a number of holes 25a that penetrate in the thickness direction of the plate.

[0015] The inner cylinder 12 has a porous cylindrical shape, with an open top and a closed bottom. The inner cylinder 12 has an inner cylinder body 31, a bottom 32, and an upper opening 33. The inner cylinder body 31 has a porous cylindrical shape, but it may also be a rectangular cylinder shape. In other words, the inner cylinder body 31 has a cylindrical shape of mesh (wire mesh, etc.). The bottom 32 has a disc shape corresponding to the shape of the inner cylinder body 31 and is integrally provided at the lower part of the inner cylinder body 31. The upper opening 33 is provided at the upper end of the inner cylinder body 31 and allows for the flow of contents between the inside and outside of the inner cylinder body 31. The holes in the mesh of the inner cylinder body 31 are set according to the type and size of radioactive waste contained inside the inner cylinder 12. That is, it is preferable that the mesh is large enough that the radioactive waste contained inside the inner cylinder 12 cannot pass through.

[0016] The tubular member 13 has a perforated cylindrical shape with its upper part and lower part open. Specifically, the tubular member 13 has a mesh cylindrical shape. The tubular member 13 is not limited to a cylindrical shape, and may have a rectangular tubular shape. One tubular member 13 is disposed at the central portion inside the inner cylinder 12. However, the position and number of the tubular members 13 are not limited, and a plurality of the tubular members 13 may be provided at positions other than the central portion. The mesh pores of the tubular member 13 are set according to the type and size of the radioactive waste accommodated in the inner cylinder 12. That is, the mesh preferably has a size that does not allow the radioactive waste accommodated in the inner cylinder 12 to pass therethrough.

[0017] In the present embodiment, the tubular member 13 is provided integrally with the inner cylinder 12. That is, the tubular member 13 is erected at the center of the bottom portion 32 inside the inner cylinder main body 31. That is, the vertical length of the tubular member 13 is substantially the same as the vertical length of the inner cylinder main body 31, and the lower end portion thereof is integrally connected to the bottom portion 32. In this case, the lower end portion of the tubular member 13 is closed by the bottom portion 32. However, the tubular member 13 may be provided separately from the inner cylinder 12.

[0018] The inner diameter of the outer cylinder 11 is larger than the outer diameter of the inner cylinder 12. The overall length (axial length) of the outer cylinder 11 is substantially the same as the overall length (axial length) of the inner cylinder 12. The inner cylinder 12 is disposed inside the outer cylinder 11. In this case, the outer cylinder 11 and the inner cylinder 12 are disposed such that the centers of both coincide with each other. The inner cylinder 12 is positioned and fixed inside the outer cylinder 11 by fitting the tubular member 13 into the guide cylinder 25 of the outer cylinder 11. In order to secure the strength of the outer cylinder 11 and the inner cylinder 12, a connecting member may be provided between the outer cylinder 11 and the inner cylinder 12 for connection.

[0019] In the processing container 10, a first gas flow path 41 is provided between the inner peripheral surface of the outer cylinder main body 21 in the outer cylinder 11 and the outer peripheral surface of the inner cylinder main body 31 in the inner cylinder 12. The first gas flow path 41 has a cylindrical shape. Further, in the processing container 10, a second gas flow path 42 is provided inside the tubular member 13. The second gas flow path 42 has a cylindrical column shape.

[0020] The lid 14 has a disc shape. The outer diameter of the lid 14 is substantially the same as the outer diameter of the flange portion 24 of the outer cylinder 11. The lid 14 is disposed on the upper portion of the outer cylinder 11 and the upper portion of the inner cylinder 12, and is fixed to the outer cylinder 11 and the inner cylinder 12 by a plurality of bolts 15. By being fixed to the upper portions of the outer cylinder 11 and the inner cylinder 12, the lid 14 closes the upper opening 23 of the outer cylinder 11 and the upper opening 33 of the inner cylinder 12. The lid 14 is detachably attached to the outer cylinder 11 and the inner cylinder 12 by the plurality of bolts 15.

[0021] The lid 14 is provided with a first communication portion 51 and a second communication portion 52 that penetrate in the thickness direction. The first communication portion 51 is disposed at the outer peripheral portion of the lid 14, and the second communication portion 52 is disposed at the central portion of the lid 14. The first communication portion 51 communicates with the upper part of the first gas flow path 41 between the outer cylinder 11 and the inner cylinder 12. The second communication portion 52 communicates with the upper part of the second gas flow path 42 inside the tubular member 13. In the present embodiment, a plurality of the first communication portions 51 are provided and one second communication portion 52 is provided, but the numbers of the first communication portions 51 and the second communication portions 52 are not limited, and for example, a plurality of the second communication portions 52 may be provided.

[0022] Although not shown, the lid 14 has a coupler corresponding to the first communication portion 51 mounted on the upper portion thereof, and a coupler corresponding to the second communication portion 52 is mounted thereon. Each of the couplers is a pipe connection coupler. That is, the coupler has a valve provided therein, and the valve is biased and supported in a direction to close the passage by the biasing force of a spring. Then, the valve is opened by connecting the plug of a pipe to the coupler.

[0023] In the present embodiment, the second communication portion 52 communicates with the second gas flow path 42 and functions as a gas inlet portion that supplies a drying gas from the outside to the second gas flow path 42. On the other hand, the first communication portion 51 communicates with the first gas flow path 41 and functions as a gas outlet portion that discharges the gas in the first gas flow path 41 to the outside.

[0024] Note that the first communication portion 51 may be caused to function as a gas inlet portion that supplies a drying gas from the outside to the first gas flow path 41, and the second communication portion 52 may be caused to function as a gas outlet portion that discharges the gas in the second gas flow path 42 to the outside.

[0025] The outer cylinder 11 is provided with a heating device 61 on its outer circumference. The heating device 61 is, for example, an electric heater. The heating device 61 is cylindrical in shape and is fixed so as to be in close contact with the outer surface of the outer cylinder 11.

[0026] The outer cylinder 11 is positioned and fixed with the inner cylinder 12 inserted inside. At this time, the cylindrical member 13 of the inner cylinder 12 is positioned outside the guide cylinder 25 of the outer cylinder 11. The heating device 61 is positioned and fixed outside the outer cylinder 11. The lid 14 is detachably attached to the outer cylinder 11 and the inner cylinder 12. Although the cylindrical member 13 is positioned outside the guide cylinder 25 of the outer cylinder 11, this configuration is not limited to this, and for example, the cylindrical member 13 may be constructed separately from the inner cylinder 12 and positioned inside the guide cylinder 25 of the outer cylinder 11.

[0027] <Methods for disposing of radioactive waste> Figure 3 is a flowchart illustrating the radioactive waste processing method of the first embodiment, and Figure 4 is a schematic diagram illustrating the drying process in the processing container.

[0028] As shown in Figures 3 and 4, the radioactive waste processing method of the first embodiment is a method for processing radioactive waste using the processing container 10 described above, and involves drying and storing the radioactive waste. Furthermore, in the radioactive waste processing method of this embodiment, various processing operations are performed remotely by an operator using a manipulator (not shown).

[0029] In step S11, the radioactive waste 100 is placed in the processing container 10. In this case, the processing container 10 has its lid 14 removed, and the radioactive waste 100 is placed inside the inner cylinder 12 through the open upper opening 33. In step S12, the lid 14 is attached to the processing container 10 to close the upper opening 33, and the radioactive waste 100 is sealed inside the processing container 10.

[0030] In step S13, various pipes constituting the drying apparatus are connected to the lid 14 of the processing container 10. Specifically, the gas supply pipe 71 has a heating device 72 at its base end and branches into multiple pipes at its tip, with plugs connected to the ends of each branch pipe. The gas discharge pipe 73 has a filter 74 and a blower 75, and a plug is connected to its base end. The operator remotely operates the manipulator to connect the gas supply pipe 71 to the second communication section 52 and the gas discharge pipe 73 to the first communication section 51.

[0031] In step S14, the drying process of the radioactive waste 100 is started. Specifically, the blower 75 is activated to apply negative pressure to the first gas flow path 41 between the outer cylinder 11 and the inner cylinder 12 through the first communication section 51 from the gas discharge pipe 73. The negative pressure in the first gas flow path 41 acts on the radioactive waste 100 contained in the inner cylinder 12 through the mesh-shaped inner cylinder body 31. The negative pressure acting on the radioactive waste 100 then acts on the second gas flow path 42 through the holes 25a of the mesh-shaped cylindrical member 13 and the guide cylinder 25, and acts on the gas supply pipe 71 via the second communication section 52.

[0032] Then, the drying gas (heated air) heated by the heating device 72 is drawn into the inner cylinder 12 through the gas supply pipe 71, the second communication section 52, the second gas flow path 42, the hole 25a of the guide cylinder 25, and the mesh-shaped cylindrical member 13, and supplied to the radioactive waste 100. The heated air moves radially outward inside the inner cylinder 12, heating the radioactive waste 100 inside the inner cylinder 12, evaporating any moisture adhering to or contained in the radioactive waste 100, and sweeping the generated water vapor to the outside of the inner cylinder 12, thereby drying the radioactive waste 100. In addition, the heating device 61 heats the radioactive waste 100 contained inside the inner cylinder 12 using radiant heat. Note that the drying gas is not limited to heated air, but may also be dry air with a low moisture content or an inert gas (such as nitrogen).

[0033] Then, the air heated with radioactive waste 100 and the evaporated gas evaporated from the radioactive waste 100 flow through the mesh-like inner cylinder body 31 into the first gas flow path 41 and are discharged from the first communication section 51 into the gas discharge pipe 73. At this time, the filter 74 adsorbs and removes harmful substances contained in the air and gas.

[0034] In step S15, it is determined whether a predetermined processing time has elapsed since the start of the drying process. If it is determined that the predetermined processing time has not elapsed since the start of the drying process (No), the drying process continues. On the other hand, if it is determined that the predetermined processing time has elapsed since the start of the drying process (Yes), the drying process is terminated. That is, the operation of the blower 75 is stopped, and the gas supply pipe 71 and gas discharge pipe 73 are removed from the lid 14. Then, in step S17, the lid 14 of the processing container 10 is replaced with a storage lid (not shown), and the radioactive waste 100 is stored in the processing container 10.

[0035] [Second Embodiment] Figure 5 is a schematic diagram showing a radioactive waste processing container according to the second embodiment.

[0036] As shown in Figure 5, the radioactive waste processing container 10A comprises an outer cylinder 11, an inner cylinder 12, a cylindrical member 13, and a lid 14. The basic configuration of the radioactive waste processing container 10A is substantially the same as that of the radioactive waste processing container 10 of the first embodiment.

[0037] The processing container 10A has a first gas passage 41 between the outer cylinder body 21 of the outer cylinder 11 and the inner cylinder body 31 of the inner cylinder 12. The processing container 10A also has a second gas passage 42 inside the cylindrical member 13. The lid 14 is provided with a first communication section 51 that penetrates in the thickness direction. The first communication section 51 is located on the outer circumference of the lid 14. The first communication section 51 communicates with the upper part of the first gas passage 41 between the outer cylinder 11 and the inner cylinder 12. The outer cylinder 11 and the inner cylinder 12 are provided with a second communication section 52 that penetrates in the thickness direction of the bottoms 22 and 32. The second communication section 52 is located in the center of the bottoms 22 and 32 of the outer cylinder 11 and the inner cylinder 12. The second communication section 52 communicates with the upper part of the second gas passage 42 inside the cylindrical member 13.

[0038] In this embodiment, the second communication section 52 communicates with the second gas passage 42 and functions as a gas inlet that supplies drying gas to the second gas passage 42 from the outside. On the other hand, the first communication section 51 communicates with the first gas passage 41 and functions as a gas outlet that discharges the gas from the first gas passage 41 to the outside. The gas supply pipe 71 (see Figure 4) can be connected to the second communication section 52, and the gas discharge pipe 73 (see Figure 4) can be connected to the first communication section 51.

[0039] The method for processing radioactive waste using processing container 10A is almost the same as in the first embodiment, and therefore, no explanation is provided.

[0040] [Effects of this embodiment] The radioactive waste processing container according to the first embodiment comprises an outer cylinder 11 having an upper opening 23 and a closed lower end, an inner cylinder 12 having an upper opening 33 and a porous cylindrical shape, and being positioned inside the outer cylinder 11 to form a first gas flow path 41 between itself and the outer cylinder 11, a cylindrical member 13 having a porous cylindrical shape and being positioned inside the inner cylinder 12 to form a second gas flow path 42 inside, a lid 14 that closes the upper opening 23 of the outer cylinder 11 and the upper opening 33 of the inner cylinder 12, a first communication part 51 that connects the outside to the first gas flow path 41, and a second communication part 52 that connects the outside to the second gas flow path 42.

[0041] According to the first embodiment of the radioactive waste processing container, a porous cylindrical inner cylinder 12 is placed inside an outer cylinder 11, and a porous cylindrical member 13 is placed inside the inner cylinder 12, forming a first gas flow path 41 between the outer cylinder 11 and the inner cylinder 12, and a second gas flow path 42 inside the cylindrical member 13. When drying gas is supplied to one of the first gas flow path 41 and the second gas flow path 42, the drying gas flows radially between the inner cylinder 12 and the cylindrical member 13, heating the radioactive waste 100, and the drying gas and steam from the radioactive waste 100 can be discharged to the outside from the other of the first gas flow path 41 and the second gas flow path 42, thereby efficiently drying the radioactive waste 100. As a result, the efficiency of the drying work on the radioactive waste 100 can be improved.

[0042] The radioactive waste processing container according to the second embodiment is the radioactive waste processing container according to the first embodiment, further comprising the first connecting portion 51 and the second connecting portion 52 provided on the bottom 22 of the outer cylinder 11 or the lid 14. As a result, providing the first connecting portion 51 and the second connecting portion 52 on the bottom 22 of the outer cylinder 11 simplifies the lid 14, and providing the first connecting portion 51 and the second connecting portion 52 on the lid 14 simplifies the outer cylinder 11.

[0043] The radioactive waste processing container according to the third embodiment is a radioactive waste processing container according to the first or second embodiment, further comprising: a second communication section 52 which is a gas inlet for supplying drying gas to the second gas flow path 42 from the outside; and a first communication section 51 which is a gas outlet for discharging the gas from the first gas flow path 41 to the outside. This allows the drying gas supplied to the second gas flow path 42 to flow radially between the inner cylinder 12 and the cylindrical member 13, thereby shortening the length of the flow path through which the drying gas flows and enabling efficient drying of the radioactive waste 100.

[0044] The radioactive waste processing container according to the fourth embodiment is a radioactive waste processing container according to any one of the first to third embodiments, further comprising an outer cylinder 11 having a cylindrical outer cylinder body 21, a bottom portion 22 provided at the lower part of the outer cylinder body 21, and a guide cylinder 25 having a porous cylindrical shape with a smaller diameter than the outer cylinder body 21, and the cylindrical member 13 is arranged on the outside (or inside) of the guide cylinder 25. As a result, the cylindrical member 13 is supported by the guide cylinder 25, and the rigidity of the cylindrical member 13 can be reduced, thereby simplifying and lowering costs.

[0045] The radioactive waste processing container according to the fifth embodiment is a radioactive waste processing container according to any one of the first to fourth embodiments, further comprising an inner cylinder 12 having a porous cylindrical inner cylinder body 31 and a bottom portion 32 provided at the lower part of the inner cylinder body 31, and a cylindrical member 13 integrally provided on the bottom portion 32. This allows the inner cylinder 12 and the cylindrical member 13 to be provided integrally, simplifying assembly to the outer cylinder 11.

[0046] The radioactive waste processing container according to the sixth embodiment is a radioactive waste processing container according to any one of the first to fifth embodiments, and furthermore, a heating device 61 is arranged on the outer surface of the outer cylinder 11. This makes it possible to effectively heat the radioactive waste 100.

[0047] The seventh embodiment of the radioactive waste processing method includes the steps of: placing radioactive waste inside the inner cylinder 12 through the upper opening 33; closing the upper opening 23 of the outer cylinder 11 and the upper opening 33 of the inner cylinder 12 with a lid 14; supplying drying gas to the second gas flow path inside the cylindrical member 13; and discharging the gas from the first gas flow path provided between the outer cylinder 11 and the inner cylinder 12 to the outside.

[0048] According to the seventh embodiment of the radioactive waste processing method, the drying gas flows radially between the inner cylinder 12 and the cylindrical member 13, heating the radioactive waste 100 and sweeping the generated water vapor to the outside of the inner cylinder 12, thereby efficiently drying the radioactive waste 100. As a result, the efficiency of the drying process for the radioactive waste 100 can be improved. [Explanation of Symbols]

[0049] 10,10A Radioactive waste processing container 11 Outer cylinder 12 Inner cylinder 13. Cylindrical member 14 Lid 15 volts 21 Outer cylinder body 22 Bottom 23 Upper opening 24 Flange section 25 Guide tube 31 Inner cylinder body 32 Bottom 33 Upper opening 41 First gas channel 42 Second gas channel 51 1st communication part 52 2nd communication part 61 Heating device 71 Gas supply piping 72 Heating device 73 Gas exhaust piping 74 filters 75 Blower 100 Radioactive waste

Claims

1. An outer cylinder having an opening at the top and a closed bottom, An inner cylinder having an upper opening and forming a porous cylindrical shape, and positioned inside the outer cylinder to form a first gas flow path between itself and the outer cylinder, A cylindrical member having a porous cylindrical shape and positioned inside the inner cylinder to form a second gas flow path inside, A lid that closes the upper opening of the outer cylinder and the upper opening of the inner cylinder, A first communication section that connects the outside to the first gas flow path, A second communication section that connects the outside with the second gas flow path, Equipped with, The inner cylinder has an inner cylinder body having a porous cylindrical shape and a bottom portion provided at the lower part of the inner cylinder body, and the cylindrical member is integrally provided on the bottom portion. The first communication section is either a gas inlet for supplying drying gas from the outside or a gas outlet for discharging internal gas to the outside due to negative pressure, and the second communication section is the other of the gas inlet and the gas outlet. A container for processing radioactive waste.

2. An outer cylinder having an opening at the top and a closed bottom, An inner cylinder having an upper opening and forming a porous cylindrical shape, and positioned inside the outer cylinder to form a first gas flow path between itself and the outer cylinder, A cylindrical member having a porous cylindrical shape and positioned inside the inner cylinder to form a second gas flow path inside, A lid that closes the upper opening of the outer cylinder and the upper opening of the inner cylinder, A first communication section that connects the outside to the first gas flow path, A second communication section that connects the outside with the second gas flow path, Equipped with, The outer cylinder comprises a cylindrical outer cylinder body, a bottom portion provided at the lower part of the outer cylinder body, and a porous cylindrical guide cylinder having a smaller diameter than the outer cylinder body, and the cylindrical member is positioned on the outside or inside of the guide cylinder. A container for processing radioactive waste.

3. The first and second communication portions are provided on the bottom of the outer cylinder or the lid. A radioactive waste treatment container according to claim 1 or claim 2.

4. The second connecting section is a gas inlet for supplying drying gas to the second gas flow path from the outside, and the first connecting section is a gas outlet for discharging the gas from the first gas flow path to the outside. A container for processing radioactive waste according to claim 2.

5. The outer cylinder comprises a cylindrical outer cylinder body, a bottom portion provided at the lower part of the outer cylinder body, and a porous cylindrical guide cylinder having a smaller diameter than the outer cylinder body, and the cylindrical member is positioned on the outside or inside of the guide cylinder. A radioactive waste treatment container according to claim 1.

6. The inner cylinder has an inner cylinder body having a porous cylindrical shape and a bottom portion provided at the lower part of the inner cylinder body, and the cylindrical member is integrally provided on the bottom portion. A container for processing radioactive waste according to claim 2.

7. The outer cylinder has a heating device arranged on its outer surface. A radioactive waste treatment container according to claim 1 or claim 2.

8. A method for processing radioactive waste using a processing container in which a porous cylindrical inner cylinder is placed inside an outer cylinder whose lower part is closed, thereby forming a first gas flow path between the outer cylinder and the inner cylinder, and a porous cylindrical member is erected at the bottom of the inner cylinder, thereby forming a second gas flow path inside the cylindrical member, and the upper openings of the inner cylinder and the outer cylinder can be opened and closed by lids, The steps include: placing radioactive waste inside the inner cylinder through the upper opening; The steps include closing the upper opening of the outer cylinder and the upper opening of the inner cylinder with the lid, The steps include supplying drying gas to the second gas flow path, The steps include: applying negative pressure to the first gas passage to discharge the gas in the first gas passage to the outside; A method for processing radioactive waste containing [unclear / unclear].

9. A method for processing radioactive waste using a processing container in which a porous cylindrical inner cylinder is arranged inside an outer cylinder whose lower part is closed, a porous cylindrical cylindrical member is arranged inside the inner cylinder, and the upper opening of the inner cylinder and the upper opening of the outer cylinder can be opened and closed by a lid, The steps include: placing radioactive waste inside the inner cylinder through the upper opening; The steps include closing the upper opening of the outer cylinder and the upper opening of the inner cylinder with the lid, The steps include supplying drying gas to a second gas passage inside the cylindrical member, A step of discharging the gas from the first gas passage provided between the outer cylinder and the inner cylinder to the outside, It has, The outer cylinder comprises a cylindrical outer cylinder body, a bottom portion provided at the lower part of the outer cylinder body, and a porous cylindrical guide cylinder having a smaller diameter than the outer cylinder body, and the cylindrical member is positioned on the outside or inside of the guide cylinder. Methods for disposing of radioactive waste.

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