JP3707564B2 - Waste repack container and method for repairing waste - Google Patents

Description

[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a solid waste repair technology in which waste, particularly low-level radioactive waste discharged from nuclear facilities, is filled in a drum can and solidified with cement, and a repack container used therefor .
[0002]
BACKGROUND OF THE INVENTION
Currently, low-level radioactive waste such as waste liquid discharged from nuclear power plants is filled in drums, solidified with cement, and stored in the power generation facility in the form of solid waste . And recently, the radioactive waste solid waste as described above has been transported to the underground burying treatment facility and processed there.
[0003]
By the way, among those that have been stored in the power generation facility for a long period of time, if the soundness is impaired, there may be a waste body that needs to be treated in some way. Therefore, it is necessary to consider in advance a countermeasure in such a case.
[0004]
DISCLOSURE OF THE INVENTION
A first object of the present invention is to provide a technique capable of repairing a waste body whose soundness is impaired so that it can be handled safely.
A second object of the present invention is to provide a technique that can easily repair a waste body at a low cost.
[0005]
A third object of the present invention is to provide a technique in which a repaired waste body can be transported by an existing system.
The third object of the present invention provides a container for repacking the waste to be used for transport by repacking the solid waste material formed by filling the waste drums,
The container is
A container body;
A lid for closing the opening of the container body,
The container body is
It has a two-body structure where the trunk and bottom are joined,
The inner diameter of the bottom bottom side is substantially equal to the outer diameter of the waste body,
The waste body repack container is characterized in that an inner diameter of the body portion is larger than an inner diameter of the bottom bottom surface side .
[0006]
The first and second objects of the present invention are a method for repairing a solid waste formed by filling a drum can with waste,
Separating the upper end and / or the lower end of the drum from the drum body, and
A step of storing the waste material end is disconnected to the repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
And a step of attaching a lid to the repack container body and closing the opening.
[0007]
The first and second objects of the present invention are a method for repairing a solid waste formed by filling a drum can with waste,
Separating the upper end of the drum from the drum body together with the cover plate;
In a state where the lid plate is placed on the solidified body in the drum can, folding the upper end of the side wall of the drum can body portion inward to re-fix the lid plate;
A step of storing the waste body cover plate is again fixed to the repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
It is also achieved by a method for repairing a waste body comprising a step of attaching a lid to the repack container body and closing the opening.
[0008]
In addition, a method for repairing a solid waste formed by filling a drum can with waste,
Folding the lower end of the drum can inward;
A step of accommodating the lower end folded the said waste in the repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
It is also achieved by a method for repairing a waste body comprising a step of attaching a lid to the repack container body and closing the opening.
[0009]
That is, in the present invention, the repacking inside diameter of the bottom portion bottom side of the container body of the container substantially equal to the outer diameter of the waste, such as waste filling drum, and the outer diameter of the bottom portion bottom and waste filling drums Since it was stored in a slightly larger container than the waste of this type and repacked and repaired, it can be safely handled even if the waste is damaged. There is no risk of disruption.
[0010]
Further, since it is not necessary to perform a special process that takes time and effort on the waste body, the repair work is easy and can be processed together with the drum can, so that the generation of waste materials such as drum can scraps can be minimized. Furthermore, the difference between the outer diameter of the bottom surface of the bottom of the repack container and the outer diameter of the drum can for filling the waste is slight and within the allowable range, so the bottom surface of the bottom of the drum for filling the waste can be held. It is possible to use a standardized container corresponding to the drum can configured as described above, and low-cost transport using an existing system can be performed.
[0011]
In the above repack container, it is preferable that the lid body has a peripheral edge part of a length that is fixed by being wound around an annular hook part provided around the opening in the container body. This eliminates the need for special fasteners and simplifies the lid fixing operation.
The container body is preferably composed of a bottom part and a body part fitted to the bottom part, and the bottom part and the body part can be joined to each other by changing the fitting length. Thereby, the height dimension of the container body can be adjusted, and the versatility of the container is improved.
[0012]
Moreover, it is preferable that a strip-shaped rib is formed on the side surface of the container body along the circumferential direction. Thereby, the strength of the container is greatly improved, and damage can be effectively prevented.
Further, in the step of closing the opening of the repack container body, it is preferable that the periphery of the lid is fixed by being wound around an annular hook provided around the opening in the repack container body. As a result, the lid can be fixed without using a fastener, and the outer diameter on the upper end side of the container can be made smaller than when a fastener is used. Difficult to occur.
[0013]
Hereinafter, the present invention will be described in detail based on examples.
[0014]
【Example】
1 to 5 relate to a first embodiment of the present invention, FIG. 1 is a cross-sectional view of a repack container in a state in which a waste body is accommodated, FIG. 2 is an enlarged view of a portion A in FIG. FIG. 4 is an enlarged view of a portion B in FIG. 1, FIG. 4 is an enlarged view of a portion C in FIG. 1, and FIG.
[0015]
In each figure, F is a primary waste that is filled with low-level radioactive waste (waste liquid) in a drum can and solidified with cement, and will be clearly distinguished from secondary waste that has been repaired. In other cases, it is simply called a waste body. In addition, the waste body F shown in FIG. 1 has the upper and lower ends cut off.
Reference numeral 1 denotes a repack container main body in which the waste body F is stored. The repack container main body 1 has a two-body structure in which a body portion 2 and a bottom portion 3 are joined.
[0016]
The bottom portion 3 is composed of a bottom surface side portion having an inner diameter substantially the same as the outer diameter of the waste body F and a large diameter portion that receives the lower end portion of the body portion 2. And as shown in FIG. 3, the trunk | drum 2 is engage | inserted by the bottom part 3, The height dimension of the repack container main body 1 is adjusted by changing this insertion length l, and it is fixed by welding. In addition, the part which has an internal diameter substantially the same as the outer diameter of the waste body F in the bottom part 3 is made to exist below the position of the rib formed in the drum can of the waste body F.
[0017]
Reinforcing ribs 4a and 4b similar to those formed on the drum can of the waste body F are also formed on the side surface of the repack container main body 1 along the circumferential direction.
Reference numeral 5 denotes a lid that covers the opening of the repack container body 1, and its peripheral edge 5a is extended from the conventional one, and as shown in FIG. 2, an annular latch provided around the opening of the repack container body 1 It is fastened and fixed to the part 6 via a packing 7.
[0018]
A cylindrical base 9 is welded to the bottom plate 8 of the repack container body 1. And the baseplate 8 itself is attached by welding the reinforcement part 10 formed by bending the peripheral part to the right angle to the inner wall face of the repack container main body 1, and the required intensity | strength is ensured by this. As can be seen from FIG. 4, the inner diameter of the bottom surface of the repack container body 1 is almost equal to the outer diameter of the waste F, and the gap d is only a few millimeters. Therefore, the outer diameter of the bottom surface side of the repack container body 1 is almost equal to the outer diameter of the waste body F. The difference between the repack container body 1 and the waste body F is that a general 200-liter drum can is held at its lower end. Therefore, the container can be transported at a low cost using the existing system as it is.
[0019]
Next, a method for repairing a waste body using the repack container will be described with reference to FIG. First, the upper and lower end portions indicated by hatching in the waste body F are separated from the main body portion with a cutter, and the outer diameter of the end portion is made small. Note that it is not always necessary to separate both the upper and lower ends, and only the portion located on the bottom bottom side when stored in the repack container body 1 may be separated.
[0020]
Subsequently, the waste body F from which the end portion is cut is stored in the repack container main body 1 by an appropriate method. Then, in order to balance the weight, the waste body F and the repack container body 1 are centered, and then the mortar 11 is filled in the gap.
After the mortar 11 is cured and solidified, the repack container main body 1 is covered with the lid 5 and its peripheral edge is wound and fixed. Thereby, the repair of the primary waste body F is completed, and a secondary waste body that can be handled safely is obtained.
[0021]
The secondary waste obtained through such repair work is loaded into a container and transported to the final disposal site. As described above, the repack container is compatible with existing systems. Waste can be transported at low cost. In addition, the repair of the waste can be performed easily and at a low cost, and it has a great effect on the treatment of radioactive waste.
[0022]
FIGS. 6 to 8 relate to a second embodiment of the present invention, FIG. 6 is a process diagram showing a drum can processing operation, FIG. 7 is a process diagram of a waste body repair operation, and FIG. 8 is a repack state of the waste body. It is sectional drawing shown.
The same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0023]
In the method of the second embodiment, first, the upper end of the waste can F, that is, the drum can filled with radioactive waste, is cut obliquely together with the cover plate 12 along the line XX as shown in FIG. Then, the separated lid plate 12 is placed on the solidified body 13 in the drum can, and in this state, the side wall upper end 14 (the portion indicated by hatching in FIG. 7) is folded inward to re-fix the lid plate 12. To do.
[0024]
The waste body F having a small size in the height direction in this way is stored in the repack container main body 1 in an inverted state, and the gap is filled with the mortar 11.
After the mortar 11 is cured and solidified, the lid 5 is put on the repack container main body 1 and the peripheral edge thereof is wound and fixed, so that the primary waste F is repacked as shown in FIG. 8 and can be handled safely. Become a body.
[0025]
In FIG. 8, reference numeral 15 denotes a waste body (repack container) holding claw in the container for transporting the waste body. As shown in FIG. 8, the waste body repaired using the waste body repack container of the present invention is Can be loaded into containers without any problems. Even if the method shown in the second embodiment is used, the same effect as that described in the first embodiment is obviously exhibited. In particular, since the lid plate of the drum can is reused, This has the effect of reducing the amount of waste material emitted. Further, even when the content is a fluid, there is a feature that it can be repacked without spilling it.
[0026]
FIG. 9 relates to a third embodiment of the present invention and is a process diagram of a waste body repairing operation. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In this third embodiment, the waste body F is inverted, and the tightening portion 16, that is, the lower end portion (the portion indicated by the hatching in FIG. 9) is forcibly folded inward to reduce the height dimension of the waste body F. Shall.
[0027]
And the waste body F is accommodated in the repack container main body 1, and the mortar 11 is filled into the space | gap. After the mortar 11 is cured and solidified, the repack container body 1 is covered with the lid 5, and the peripheral edge thereof is wound and fixed, whereby the primary waste F is repacked and becomes a secondary waste that can be handled safely.
In the method of the third embodiment, since the operation can be performed without touching the solidified body in the drum can, it is particularly excellent in safety, and the amount of waste material discharged with the processing of the drum can is extremely small. Therefore, there is a feature that processing can be performed more easily.
[0028]
【effect】
According to the present invention, it is possible to repair a waste body that has lost its soundness so that it can be handled safely, and this repair work can be performed easily and at low cost, and the repaired waste body can be transported by an existing system. It is excellent in economy and workability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a repack container in a state where a waste body is stored.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is an enlarged view of a portion B in FIG.
4 is an enlarged view of a portion C in FIG.
FIG. 5 is a process diagram of a waste body repairing operation (first embodiment).
FIG. 6 is a process diagram showing a drum can processing operation.
FIG. 7 is a process diagram of a waste body repairing operation (second embodiment).
FIG. 8 is a cross-sectional view showing a repacked state of a waste body.
FIG. 9 is a process diagram of a waste body repairing operation (third embodiment).
[Explanation of symbols]
F waste body 1 repack container main body 2 trunk 3 bottom 4a, 4b rib 5 lid 5a peripheral edge 11 mortar

Claims (8)

A container for repacking the waste material used for solid waste material formed by filling the waste drums when transporting and repacking,
The container is
A container body;
A lid for closing the opening of the container body,
The container body is
It has a two-body structure where the trunk and bottom are joined,
The inner diameter of the bottom bottom side is substantially equal to the outer diameter of the waste body,
The waste repack container, wherein an inner diameter of the trunk portion is configured to be larger than an inner diameter of the bottom bottom surface side .   2. The waste repack container according to claim 1, wherein the lid body has a peripheral edge portion of a length that is fixed by being wound around an annular hook portion provided around the opening in the container body. Body of the container body, Ri Contact and fitted to the bottom, according to claim 1 or claim and said bottom and the body is characterized by comprising been configured for joining by changing the fitting length 2 waste repack containers.   The waste repack container according to any one of claims 1 to 3, wherein a belt-like rib is formed on a side surface of the container main body along a circumferential direction. A method for repairing solid waste formed by filling a drum can with waste,
Separating the upper end and / or the lower end of the drum from the drum body, and
A step of storing the waste material end is disconnected to claims 1 to 4 either repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
A method of repairing a waste body, comprising: attaching a lid to the repack container main body and closing the opening. A method for repairing solid waste formed by filling a drum can with waste,
Separating the upper end of the drum from the drum body together with the cover plate;
In a state where the lid plate is placed on the solidified body in the drum can, folding the upper end of the side wall of the drum can body portion inward to re-fix the lid plate;
A step of storing the waste body cover plate is again fixed to claims 1 to 4 either repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
A method of repairing a waste body, comprising: attaching a lid to the repack container main body and closing the opening. A method for repairing solid waste formed by filling a drum can with waste,
Folding the lower end of the drum can inward;
A step of accommodating the lower end folded the said waste to claims 1 to 4 either repack container body,
A step of the cementitious material filling and solidified in the gap between the repacking container body and the waste,
A method of repairing a waste body, comprising: attaching a lid to the repack container main body and closing the opening.   In the step of closing the opening of the repack container body, the lid body is fixed by being wound around an annular hook provided around the opening of the repack container body. The method for repairing a waste body according to any one of claims 5 to 7.

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