JP3316509B2 - Radioactive waste disposal container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing container for storing and solidifying a container body filled with radioactive waste together with a solidifying material.

[0002]

BACKGROUND OF THE INVENTION Until now, low-level radioactive waste generated in nuclear facilities such as nuclear power plants has been filled in steel drums, solidified with cement paste, etc., and stored in the facility. . However,
Recently, low-level radioactive waste burial facilities have been completed, and drums filled with radioactive waste stored at nuclear facilities in various locations have been transported to the burial facilities.

[0003] By the way, some steel drums (hereinafter referred to as drums) filled with radioactive waste stored in a nuclear facility are several decades old. Drums whose soundness has been impaired when transported to the airport may be found. And
If the integrity is only slightly impaired, there is no problem if it is merely stored, but sufficient measures must be taken when it is shipped.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made to satisfy the above-mentioned demands, and has as its object to provide a technique which is safe in the treatment of radioactive waste. In other words, if the soundness of a drum that has been stored for several decades has been impaired, it has been considered that a metal piece may be attached to the corresponding location with an adhesive or the like. It is never easy to do it remotely. In addition, it is conceivable to work closer,
Attention must also be paid to the possibility of radiation exposure.

[0005] In view of the above, as a result of further investigations, it has been found that, in order to remotely treat a drum can filled with radioactive waste and solidified, the possibility of deteriorating the soundness of the drum can be reduced by the aforementioned method. It has been decided that a method of preparing a drum can slightly larger than the drum can and adopting a method of storing a drum can whose soundness may be impaired in the large drum can be adopted.

However, it is not sufficient to simply prepare a slightly larger drum. That is, a large drum was used to house a drum that was assumed to be impaired in soundness, and filled with a solidified material such as cement paste from the viewpoint of safety, and tested for safety such as a drop test. We found that there was a problem to be solved. In other words, the drum can be assumed to have deteriorated in soundness in a large drum, and a cement paste or other solidified material is filled, and cement paste is injected between the stored drum and the drum outside. The missing part was found.

The present invention has been achieved as a solution based on such knowledge, and the present invention provides a method for storing and solidifying a container body in which radioactive waste is filled together with a solidifying material. A processing container, wherein a container body support member is provided such that a space for inflow of a solidified material is formed between an inner bottom surface of the processing container and an outer bottom surface of the container body in a state where the container body is stored. And the inner bottom of the processing vessel is substantially
A J-shaped or substantially S-shaped air vent pipe is provided
The present invention proposes a radioactive waste treatment container characterized in that:

In the radioactive waste treatment container, the container support member is formed in a shaft shape.
It is preferable that the strength of the processing container is improved by combining shaft members such as a shape, a hexagonal shape, and an H shape. Preferably, a body positioning mechanism is configured.

When the radioactive waste treatment container having the above-mentioned structure is used, a drum can whose soundness has been impaired is housed therein, and a solidified material such as cement paste is injected into the container. The solidified material spreads so as to uniformly cover the entire drum with impaired soundness and solidifies in this state, so safety is sufficiently ensured and even if it is used for transportation there is no problem.

Moreover, if the radioactive waste treatment container is formed in a shape similar to that of the drum can whose soundness is impaired, that is, a somewhat larger and substantially similar shape, a drum can handling device whose soundness is not impaired is directly used. Since it can be used and does not require a new handling device, workability is high and economical. Hereinafter, the present invention will be described with reference to specific examples.

[0011]

1 and 2 show a first embodiment of a radioactive waste treatment container according to the present invention. FIG. 1 is an overall sectional view, and FIG. 2 is a perspective view of a main part. In each figure, A is a drum with impaired soundness. In addition, this drum A is
As is well known, for example, a homogeneous solidified waste liquid, miscellaneous solids, and other low-level radioactive waste are filled therein, and a solidifying material such as cement paste is filled therein.
It is solidified.

1 has a diameter of 20 to 30 than that of the drum A
It is a slightly larger drum such as about mm.
Therefore, the drum A with the lid removed can be stored in the drum 1 without any problem. The drum 1 can also be operated by a handling device that can operate the drum A. In addition, the height of the drum 1 is 20 to 30 m higher than the height of the drum A.
m higher.

Reference numeral 2 denotes a + shaped reinforcing member fixed inside the bottom surface of the drum 1. That is, the channel steel 2a and the channel steel 2b are integrated into a + shape, and the notch 3 is formed at the end of the channel steel 2a, 2b of the reinforcing member 2 having the + shape. . The notch 3 is formed at a concentric position from the center, and
As can be seen from FIG. 1, the drum chime at the lower end of the drum A is caught by the end of the notch 3 and the drum A
Is configured to be positioned. In other words, the drum mechanism A is configured to be concentrically housed inside the drum 1 by the positioning mechanism.

Reference numeral 4 denotes a notch formed in the center of the channel steel 2a. Reference numeral 5 denotes a substantially J-shaped air vent pipe, which is attached at a desired position on the bottom of the drum 1. Reference numeral 6 denotes an elastic body provided on the peripheral wall of the drum 1, which plays a role of a guide when the drum A is stored in the drum 1 and a role of preventing the peripheral wall from being damaged.

Reference numeral 7 denotes a reinforcing annular rib provided on the peripheral wall of the drum 1. 8 is a lid for the drum 1. When the drum 1 configured as described above is used, the operation can be safely performed when the drum A having the possibility of deteriorating the soundness is transported from the nuclear facility to the burial facility.

That is, when there is a drum A that may be damaged in soundness, the drum A is operated by a remote handling device and stored in the drum 1. In addition, a + -shaped reinforcing member 2 is disposed at the bottom of the drum 1, and a notch is formed at the end of the reinforcing member 2 at a position on a circumference having a diameter substantially equal to the diameter of the drum A. Since the portion 3 is formed, when the drum A is stored, the notch 3 of the reinforcing member 2 causes the drum A to be stored concentrically with the drum 1.

After the drum A is stored in the drum 1,
A solidifying material 9 such as cement paste is injected. The injected solidified material 9 has the reinforcing member 2 composed of the channel steels 2a and 2b between the drum can A and the drum can 1, so that the inside of the drum can 1 is covered so as to cover the entire drum can A from a gap formed by the reinforcing member 2. Will be evenly distributed to every corner. Therefore, after the solidified material 9 is solidified, the entire drum A with impaired soundness is covered with the solidified material 9 and the outside thereof is covered with the drum 1. It is extremely safe, and there is no problem even if it is used for transportation.

The handling device used for remote operation of the drum can A is not so different from the size of the drum can A because the whole drum can A whose soundness has been impaired is covered with the solidified material 9. And can be transported to the burial facility in the same manner, without causing any inconvenience. FIG. 3 is a perspective view of a main part (reinforcing member 2) in a second embodiment of the radioactive waste disposal container according to the present invention.

In this embodiment, the reinforcing member 2 is formed by using the square pipes 12a and 12b, and the basic technical concept is the same as that described in the above embodiment. Description is omitted. 13 is a square pipe 12
a, 12b are cutouts formed at the ends. FIG.
It is a top view of the important section (reinforcement member 2) in the 3rd example of a radioactive waste disposal container concerning the present invention.

In this embodiment, the reinforcing member 2 is formed in a six-handed shape using the square pipes 12a, 12b and 12c, and the basic technical idea is the same as that described in the above embodiment. Therefore, detailed description is omitted. Incidentally, 13
Is a notch formed at the end of the square pipes 12a, 12b, 12c. FIG. 5 is a plan view of a main part (reinforcing member 2) of a radioactive waste disposal container according to a fourth embodiment of the present invention.

In this embodiment, the reinforcing member 2 is formed in an H shape by using square pipes 12a, 12b, 12c, and the basic technical concept is the same as that described in the above embodiment. Therefore, detailed description is omitted. In addition, 13
It is a notch formed at the end of the square pipes 12a and 12b. FIG. 6 shows a fifth embodiment of the radioactive waste treatment container according to the present invention.
It is a perspective view of the important section (reinforcement member 2) in an example.

In this embodiment, the reinforcing member 2 is formed by using angle irons 22a and 22b, and the basic technical concept is the same as that described in the above embodiment.
Detailed description is omitted. 23 is an angle iron 22a, 2
It is a notch formed at the end of 2b. FIG. 7 is a side view of an air vent pipe in a sixth embodiment of the radioactive waste disposal container according to the present invention.

In the present embodiment, the solidified material 9 is formed into a substantially S shape with respect to the J shape described in the first embodiment so that the injected solidified material 9 does not enter from above the pipe 5. And the basic technical ideas for others are
Since this is the same as that of the embodiment, detailed description is omitted. FIG. 8 shows a seventh embodiment of the radioactive waste treatment container according to the present invention.
It is a side view of a pipe for air bleeding in an example.

In this embodiment, the injected solidified material 9
Is provided with an umbrella 5a at the upper end of the J-shaped pipe 5 so that it does not enter from above the pipe 5, and the other basic technical ideas are the same as those of the first embodiment. Detailed description is omitted.

[0025]

[Effect] The treatment of drums filled with radioactive waste, which may impair the soundness, is thorough, and there is no problem even if the drum can be used for transportation. In addition, if this radioactive waste disposal container has a similar shape to the drum that may impair the soundness, that is, if it has a somewhat larger similar shape, the drum handling device that does not impair the soundness can be used as it is. As a result, there is no need for a new handling device, so workability is high and economical.

[Brief description of the drawings]

FIG. 1 is a sectional view of an entire radioactive waste treatment container (first embodiment) according to the present invention.

FIG. 2 is a perspective view of a main part of a radioactive waste treatment container (first embodiment) according to the present invention.

FIG. 3 is a perspective view of a main part of a radioactive waste treatment container (second embodiment) according to the present invention.

FIG. 4 is a plan view of a main part of a radioactive waste treatment container (third embodiment) according to the present invention.

FIG. 5 is a plan view of a main part of a radioactive waste treatment container (fourth embodiment) according to the present invention.

FIG. 6 is a perspective view of a main part of a radioactive waste treatment container (fifth embodiment) according to the present invention.

FIG. 7 is a side view of a main part of a radioactive waste disposal container (sixth embodiment) according to the present invention.

FIG. 8 is a sectional view of a main part of a radioactive waste treatment container (seventh embodiment) according to the present invention.

[Explanation of symbols]

 A Drum can whose soundness is impaired 1 Drum can 2 Reinforcement member 2a, 2b Channel steel 3, 13, 23 Notch 5 Pipe for air bleeding 6 Elastic body 7 Reinforcing annular rib 8 Lid 9 Solidification material 12a, 12b , 12c Square pipe 22a, 22b Angle iron

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masumi Fukahori 1-28-10 Hongo, Bunkyo-ku, Tokyo Chichibu Cement Co., Ltd. Related Products Division (72) Inventor Mitsuyuki Ino 1-7- Ginza, Chuo-ku, Tokyo 10 Nippon Steel Drum Co., Ltd. Special Can Division (72) Inventor Masaru Utamura 5-7-1 Nishihashimoto, Sagamihara City, Kanagawa Prefecture Nippon Steel Drum Co., Ltd.Technical Center Examiner Atsushi Yamaguchi (56) References JP Akira 52-85700 (JP, A) JP-A-5-2098 (JP, A) JP-A-57-88400 (JP, A) JP-A-59-80800 (JP, U) (58) Fields investigated (Int. Cl. ^7, DB name) G21F 9/36 501 G21F 5/00 G21C 19/32

Claims (1)

(57) [Claims] 1. A radioactive waste is filled together with a solidified material.
A processing container for storing and solidifying the container body comprising: a bottom of the processing container in a state where the container body is stored.
Between the inner surface of the container and the outer surface of the bottom of
A container support member is provided so that a space is formed.Become A substantially J-shaped or substantially S-shaped empty space is formed at the inner bottom of the processing container.
A venting pipe is provided Radiation characterized by that
Waste disposal container.