JP2001255399A - Cover for container charged with radioactive waste and method for charging the container with the cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a container charged with radioactive wastes that makes it possible to transport them to a treatment reactor along an opened transportation route and a method for charging them by using the cover. SOLUTION: The container 3 charged with the radioactive wastes is stowed inside a cover body 1 of the cover, and an opening 9 is covered with a detachable/attachable top 2 of the cover. In this state, the container is transported to the disposal reactor 20. The top 2 of the cover is removed in an upper part of the disposal reactor 20 to take the container 3 out of the cover body 1 of the cover, and the radioactive wastes are charged into the reactor 20 by opening a bottom cover 5. Even though the radioactive wastes might generate dust like a filter or a thermal insulating material, the transportation route can be formed into an opened structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging container cover for a charging container for a radioactive waste used for charging a radioactive waste into a processing furnace, and a method for charging a radioactive waste using the same. It is.

[0002]

2. Description of the Related Art Combustible radioactive waste generated from a nuclear power plant or the like is filled in a dedicated charging container, transferred to a processing furnace such as an incinerator or a melting furnace, and is charged into the furnace for processing. I have. When the radioactive waste is in the form of a block, there is no real harm if the input container filled with the radioactive waste is transferred along an open transfer path.

[0003] However, if the radioactive waste is a substance that may generate dust such as a filter or a heat insulating material, the surroundings of the transfer path may be contaminated.
Conventionally, this transfer path has been completely sealed. For this reason, there are problems that maintenance is difficult, and a large space is required to make the transfer path a sealed structure.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and is capable of transferring radioactive waste that may generate dust to a processing furnace along an open transfer path. The purpose of the present invention is to provide a radioactive waste input container cover and a radioactive waste input method using the same.

[0005]

According to the first aspect of the present invention, there is provided a radioactive waste charging container cover having a bottom cover and capable of storing therein a radioactive waste charging container. It is characterized by comprising a cover main body, and a detachable cover upper cover for covering an opening formed in an upper part of the cover main body. It is preferable that the cover body includes a container receiver that supports the bottom lid of the charging container and a container guide that supports the side surface of the charging container.

[0006] The method for charging radioactive waste according to the present invention comprises:
The radioactive waste is filled in a charging container provided with a bottom cover, and the charging container is stored in the cover main body of the radioactive waste charging container cover according to claim 1, and is sealed to the processing furnace with a cover upper cover. The method is characterized in that the container is transferred, the cover upper cover is removed at the upper part of the processing furnace, the charging container is taken out of the cover body, the bottom cover is opened, and the radioactive waste is charged into the furnace.

According to the present invention, since the radioactive waste charging container is housed inside the cover body and the upper opening can be closed by the cover upper cover, the radioactive waste which may generate dust can be removed. Can also be transferred to the processing furnace along an open transfer path.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a vertical sectional view of a radioactive waste charging container cover of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. The charging container cover includes a cover main body 1 and a cover upper cover 2, and a charging container 3 for radioactive waste is stored therein.

First, the charging container 3 will be described. The charging container 3 has been used conventionally, and has a bottom lid 5 which can be opened and closed at the bottom of the cylindrical container portion 4. The bottom lid 5 has a shape like a bird's beak obtained by bisecting an inverted conical surface by a vertical plane passing through the center thereof, and is pivotally attached to the bottom of the cylindrical container portion 4. Opening / closing cylinders 6 are provided on both sides of the cylindrical container portion 4, and the lower ends of the rods 7 are connected to the bottom lid 5 via a pair of links 8. When the rod 7 is in the position where the rod 7 is pulled up as shown in FIG. 1, the bottom cover 5 is closed, and when the rod 7 is pushed down, as shown in FIG.

The cover main body 1 of the charging container cover has a cylindrical shape with a bottom as shown in FIG. 1, and a circular opening 9 for inserting and removing the charging container 3 is formed only on the upper surface.
On the bottom surface of the cover body 1, a container receiver 10 that supports the bottom lid 5 of the charging container 3 and a container guide 11 that supports a side surface of the charging container 3 are provided. The container receiver 10 has four bolts set up vertically at symmetrical positions, and can support the inverted conical bottom lid 5 at four points. The container guide 11 is made of L-shaped steel 4 as shown in FIGS.
Bolts 12 are attached inward to the tips of the columns, and these bolts 12 are engaged with recesses of ribs 13 formed on the outer peripheral surface of the charging container 3 to prevent the charging container 3 from tipping over. is there. The container 3 and the container guide 11 allow the container 3 to be inserted into the cover body 1.
Can be held stably.

As shown in FIG. 1, the height of the cover main body 1 of the charging container cover is lower than the height of the charging container 3, and when the charging container 3 is stored, the upper part thereof rises upward from the opening 9 of the cover main body 1. Protrude. The cover upper lid 2 is a bottomless cylindrical body that is put on the upper portion of the cover body 1 so as to cover the projecting portion from the outside. At its lower end is a diagonally inward rib 14
Are projected and fit into the opening 9 of the cover main body 1 well.

Next, a method of charging radioactive waste using the charging container cover will be described with reference to FIG. First, as shown at the left end of FIG. 4, the inside of the charging container 3 is filled with radioactive waste. At this time, the bottom cover 5 is closed. Next, the upper portion of the charging container 3 is chucked and housed inside the cover main body 1, and the cover upper lid 2 is covered. As described above, in this state, the charging container 3 is stably supported by the container receiver 10 and the container guide 11 provided on the bottom surface of the cover body 1,
It is closed by the cover upper lid 2.

With the charging container 3 sealed in the charging container cover in this manner, the charging container 3 is transferred to a position above the processing furnace 20 as indicated by an arrow. The transfer is carried out by a conveyor (not shown). However, since the radioactive waste is double-covered by the charging container 3 and the charging container cover, there is a possibility that dust such as a filter or a heat insulating material may be generated. Even if there is, there is no risk that the radioactive material will scatter around. Further, since the charging container 3 is stably supported, there is no lighting inside the charging container cover. For this reason, conventionally, a sealed transfer path as shown by a dashed line in FIG. 4 was required, but in the present invention, an open transfer path can be used.

When the charging container 3 enclosed in the charging container cover reaches above the processing furnace 20, the cover upper cover 2 is removed by an automatic machine as shown in FIG. 4, and then the charging container 3 is removed from the cover main body 1. Taken out. At this time, since the upper portion of the charging container 3 protrudes from the opening 9 of the cover main body 1, attachment and detachment by an automatic machine is easy. The removed charging container 3 moves to the charging port 21 on the upper part of the processing furnace 20,
The bottom lid 5 is opened by the opening / closing cylinder 6, and the radioactive waste is put into the furnace. Thereafter, the charging container 3 and the charging container cover return to the original position again along the transfer path, and the same cycle is repeated.

[0015]

As described above, according to the radioactive waste input container cover and the radioactive waste input method using the same according to the present invention, the radioactive waste input container is housed inside the cover body. However, since the radioactive waste may generate dust like a filter or heat insulator, it can be safely transferred to the processing furnace along the open transfer path even if the radioactive waste may generate dust like a filter or heat insulator. Can be. For this reason, there is an advantage that a large space for making the transfer path a sealed structure is not required, and maintenance of the transfer path and the like is easy.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a radioactive waste charging container cover of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a state where a bottom cover of the charging container is opened.

FIG. 4 is an explanatory diagram of a method for charging radioactive waste according to the present invention.

[Explanation of symbols]

1 cover body, 2 cover top lid, 3 charging container, 4
Cylindrical container, 5 bottom lid, 6 opening / closing cylinder, 7 rod, 8 link, 9 opening, 10 container receiver, 11
Container guide, 12 bolts, 13 ribs, 14 oblique inward ribs, 20 processing furnace, 21 inlet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G21F 9/28 B09B 3/00 303J 303K

Claims (3)

[Claims] 1. A cover main body having a bottom lid and capable of storing a radioactive waste charging container therein, and a detachable cover upper lid for covering an opening formed at an upper portion of the cover main body. Container cover for waste radioactive waste. 2. The radioactive waste input container cover according to claim 1, wherein the cover main body includes a container receiver for supporting a bottom cover of the input container and a container guide for supporting a side surface of the input container. 3. The radioactive waste is filled in a charging container provided with a bottom lid, and the charging container is housed inside the cover body of the radioactive waste charging container cover according to claim 1 and sealed with a cover upper lid. Transferring to the processing furnace in the state, removing the top cover of the cover at the top of the processing furnace, taking out the charging container from the cover body, opening the bottom cover and charging the radioactive waste into the furnace Input method.